They're a good design specifically because of the lack of brushes, because brushes wear out, are expensive and inefficient compared to a silicon rectifier. If the motor is driving the load, it’s a motor. To help you have a stress free RV camping experience, below is a guide on using a generator on RV. You can control the output power (and therefore the load the alternator places on the shaft) by modulating the field current. driven by a wind or water turbine or even by hand. Hall sensors are not needed on brushless motors. As electric currents move through a wire, a circular magnetic field is created around the wire. This method is used for small low cost power … @WilliamBrodie-Tyrrell true enough for a PM brusjless just needing rectified; however, the article OP linked was about direct sc generation using the commutation ring to rectify for you...so brusjless sould be usable for a generator, just now how the article described. Also, what would the output of the generator made in volts and amperes? To get any. As an alternative, the motor speed can be enhanced by the use of a gearhead (see below). A small modification can produce lower voltages in AC power and when rectified is useful for all kind of applications we normally use. Your permanent magnet electric motor can be used as a generator. The input given to these machines will be electrical input for the former and mechanical input for the latter. So using materials easily available in a high school physics laboratory, how can I convert an AC motor table fan into a generator? Some types of washing machine use large DC motors that can be removed along with their axles and bearings and reused as generators. As an alternative, the motor speed can be enhanced by the use of a gearhead (see below). Since our motors are very efficient, this is also true when operated as generators. Surely those are completely different things. The higher the winding resistance, the higher the generated (no-load) voltage. Keep in mind that BLDC motors used as generators do not produce a sin-wave output. Select a motor type with a continuous torque higher than the generator torque.When calculating the torque or current load, consider the type of operation. How can a GM subtly guide characters into making campaign-specific character choices? High reduction gearheads (3 stages and higher) are not back-drivable; i.e. A DC motor is exactly the same thing as a DC generator. It is a common application in case of regenerative braking. Any electric motor will also output a voltage when it’s freely spinning. Don't expect much power output from just putting a propeller on a motor shaft. Any DC motor with permanent magnets can easily be a generator. Turns out, they aren’t. The AC current can be used as-is, he reports, to run LEDs, or easily rectified to give DC. It converts mechanical energy into electrical energy. Will the generator run continuously for long periods of time, or in intermittent operation cycles, or during short intervals only? Produce-Electricity-from-a-DC-Motor. A motor, which is also called an electric motor, converts electric energy into mechanical energy by following the principle of magnetism. Many generators are operated at speeds of 1000 rpm or below. By continuing to use this website, you are agreeing to the use of cookies. Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. Electrical engineer Felix Herger on environmental simulations to test the robustness of drive systems. If you turn any motor, it will generate electricity. For the generation of AC voltage, select a brushless EC motor and connect 2 phases only. We use cookies to optimize the design of this website and constantly enhance your experience. Generator (stepper motor) can be easily fastened directly to the bracket using clamps or using a metal "L" profile. Can ANY DC motor become a generator if torque is applied to the shaft? Generating 10 V or more at 1000 rpm requires a speed constant of only 100 rpm/V or less. The motor’s stator, which is an elect… Using A Motor As A Generator Free Tattoo Generator generator A dynamo or similar machine for converting mechanical energy into electricity An apparatus for producing gas, steam, or another product engine that converts mechanical energy into electrical energy by electromagnetic induction an apparatus that produces a vapor or gas A thing that… This is not only possible but very economical, especially when you use a 3 phase induction motor as a single or 3 phase generator. The commutator is used for changing … user2883071 a PM motor is one with Permanent Magnets inside. What governs the output voltage of a three-phase generator? Since 2016, it has been in use in production vehicles. A generator is the opposite: you spin and it generates voltage. However, the higher the winding resistance, the more sensitive the generated voltage becomes to load current changes. Select a winding that can generate the required voltage U even under load. If I see a motor that says 1.5V and 4700 RPM, does that mean that if I do reach 4700RPM, the max voltage that can be output is 1.5V? There is an excitation coil to adjust the magnitude and direction of current. However, there are some important points to consider when designing the drive. For example, a car alternator has DC slip-rings (not a commutator!) Large motor–generators were widely used to convert industrial amounts of power while smaller motor–generators were used to convert battery … Also respect the maximum speed of the motor type. rv parked at a campground. Podcast 305: What does it mean to be a “senior” software engineer. Washing Machine motors are three phase 230 volts motors and can generate three phase 400 volts at 400 watts electricity, so it can be quite dangerous in the wrong hands specially somebody who is not familiar with electricity. And when needed use the generator as a motor when the IC engine is not needed. How can I visit HTTPS websites in old web browsers? Notably, Hall sensors are not needed on brushless motors. Rule #2 requires motors with high generator constant. Of course, a motor is optimized for turning when you power it, not generating electricity, so it doesn't work as well as a real generator might. The most appropriate winding of a given motor type follows from the current and generated voltage requirements. relative velocity between the rotating magnetic field and the rotor). The motor and the generator are almost similar from the construction point of view, as both have stator and rotor. Why are good absorbers also good emitters? When you open the contactor or the mains is off the motor will lose voltage and then cannot act as a generator. A brushless motor being used as a motor does require a complex controller; if you want to use the motor as both motor and generator in the same device then you will want a two or four (depending on whether you need both directions of rotation) quadrant controller, and that costs more than a simple single-quadrant (motor-drive only) controller. Can anti-radiation missiles be used to target stealth fighter aircraft? Spur gearheads can more easily be back driven and the back-driving efficiency generally is higher. Further information is available in our privacy policy. The tiny amount power generated by spinning the fans with a vacuum isn't anything to worry about. If the motor has a separate field winding instead of a permanent magnet, you will need to energise that winding from an external DC source, e.g. In DC machines, the commutator is used whereas in AC type slip rings are used. What does the ^ character mean in sequences like ^X^I? Free Tattoo Generator. Electrical. However, due to the generally low speeds this is hardly ever an issue. Use gearheads that can be back-driven, i.e. The magnetism of brushless DC motor is different from that of generator, which is divided into excitation and self-excitation. Is there a reason why 午 and 年 look so similar? This is the simple straight forward explanation. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Discussion in 'Electronic Basics' started by leeps, Jul 21, 2006. However, there are major differences in how they generate this force. Where is the antenna in this remote control board? Science Advisor . Who must be present at the Presidential Inauguration? Don't know if this will harm the motor, or just not provide sufficient rpm. Select the winding according the required tacho voltage and the speed range in your application. The working of both these machines will be different. How do I calculate the regulation of the generator in a Ward-Leonard system? to supply a small field current to the rotor, and a three phase (usually) stator winding. Gold Member. However, maxon gearheads are not really good in being driven from the output. brushless motors make excellent generators, you just need to rectify the output. These contradictory effects can be eliminated to a certain extent by selecting larger motors that exhibit lower resistances for the same generator constant (according to Rule #3). Rule #4: Use gearheads to increase very low speeds. Why Do RVs Have Generator. So when my little sister (grade … You may use 1 or 2 stage planetary gearheads; they can be operated from the output. Most of the motor applications I work with involve point to point position control: in getting from Point A to Point B, the motor must accelerate to some speed, then decelerate such that the motor speed reaches zero … If the load is driving the motor, it’s a generator. And by any, I mean the really cheap ones too. For the generation of AC voltage, select a brushless EC motor and connect 2 phases only. In case of regenerative braking, the accelerator is not being used, but the rotor of the motor which is connected to the wheel via the shaft continues rotating. I have an idea for a class project (University level) that I wanted to check the feasibility of. In the following, a few rules for a successful selection. Do not select the motor-generator on power considerations alone. rev 2021.1.18.38333, The best answers are voted up and rise to the top, Electrical Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us, a series wound motor has no back-emf limited top speed, and you have to exceed the top speed (for the voltage desired) to get power out of a generator, so without modification a series wound motor will never generate electricity. 25,363 4,942. We are provided a shaft running at x RPM and expected to transfer that energy to a shaft of y RPM by designing and building our own transmission. Accordingly, a motor size with sufficient continuous torque or current has to be chosen. Known as the part that converts power from internal combustion into the electricity needed to run everything else, they can also themselves be used as … Using a DC motor as a generator to create a small hydroelectric energy demo project I; Thread starter FA22raptero; Start date Mar 19, 2018; Mar 19, 2018 #1 FA22raptero. Up to . Using a generator without magnets is not really a good idea. The basic calculations between speed and voltage as well as current and torque are very simple. Because you must energize 2 sets of coils you automatically cut the available battery power in half. Many people have doubts about whether the brushless DC motor can be used as a generator under certain conditions. High resistance reduces the output voltage under load and the output voltage becomes very sensitive to the load current. Generating 10 V … The generator is vice versa of that motor. How would a theoretically perfect language work? You need to account for the efficiency of the motor (usually >85%) so you are probably going to see about 25VAC at that RPM. Discussions . a battery. All that needs to be done is to apply an external power source to spin the shaft of any permanent magnet electric motor and your motor becomes a generator. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Smaller motors have higher speed constants. Rather use spur gears instead of planetary gearheads. A car is easier to move than a 150 lb generator. The solution depends on whether you will use a horizontal or vertical turbine. Many generators are operated at speeds of 1000 rpm or below. 2020 Award. Using a generator to supply the much needed Power while RV camping is one aspect you should consider when planning to camp using an RV. Difference Between Motor and Generator. Rule #1: For generation of DC voltage select a brushed DC motor or use a brushless EC (BLDC) motor with voltage rectifier. The problem I will most likely encounter is that the IC engine will be fluctuating while it is in use, for example driving a car. There are only a few high resistance windings on larger motors that satisfy this requirement. 99.9% of cheap, lr R/C toy motors are going to be PM brushed DC type. Induction generators are also called as asynchronous generators. If I am blending parsley for soup, can I use the parsley whole or should I still remove the stems? Can the two be replaced with each other? Complete mechatronic drive solutions offer many advantages over individual components. Speed constant kn. a winding with a sufficiently high resistance. Every now and then, I’m asked about the suitability of maxon DC motors for the use as a generator. What is a "Major Component Failure" referred to in news reports about the unsuccessful Space Launch System core stage test firing? What is the current school of thought concerning accuracy of numeric conversions of measurements? The chart quite nicely shows the ambivalent effects of different windings. Worried about EMI? Rule #2: Without considering the load, the winding should have a speed constant of kn < n/u   or smaller. Actually, you'd probably end up having to spin it at about 5000 to 5300 rpm to achieve 1.5V (coil resistance & mechanical drag losses work against you both when using it as a motor & as a generator, so there's a significant rpm overlap), but your basic premise is correct there. This causes the motor to act as a generator and feed power back into the batteries … Jul 21, 2006 #1. leeps Guest. All of the parts are the same, they are just powered one way to make a motor and another way to make a generator. A rotating excitation coil exists in the form of … The relevant physics works both ways. In an induction motor, the rotor rotates because of slip (i.e. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. That style of motor (only two terminals connecting to two windings and no permanent magnets) is generally not appropriate for generation because you have no guarantee it will do anything, and no good way to control the generated power/load. The EC-i 40 High Torque motors are very interesting from this point of view. 1 0. A Brush-less Direct Current Motor, also known as Permanent Magnet BLDC motor can be used as a generator. Oct 6, 2010 #5 sophiecentaur. Rule #1: For generation of DC voltage select a brushed DC motor or use a brushless EC (BLDC) motor with voltage rectifier. That’s quite a low speed for small motors. (except from residual magnetism). If it's a "series wound" DC motor, I don't think it will generate unless part of the motor chassis is residually magnetised. The gearheads need to be driven in reverse operation in these cases. using a motor as a generator Reply to Thread. The integrated motor-generator (IMG Gen3) provides electric propulsion to the vehicle in its function as a motor, while in its capacity as a generator it converts mechanical braking energy into electrical energy. The amount of torque on the generator defines the size and type of the motor-generator. Part of the grade is uniqueness/innovation, hence the following idea. What is the technical name for fan that produces electricity? Eaga Trust - Information for Cash - Scam? Three phase motors are a bit of a mystery to most folks on a single phase grid. Howdy folks, I took a course way back in undergrad on the fundamentals of energy sustainability, so I have a good preconception how how hydropower works in general, but not in detail. I've seen many brushless DC motors for, say, high-end R/C motlrs & most computer fans; not sure I've ever come across a brushed, non PM though (well, except in high-school shop class). Discussion motor as a generator Electric Motor Design and Construction Don’t worry about the winding resistance, just make sure that there is a load resistance of several kΩ to keep currents small. The main difference between the two is that the Motor is an electric device which converts electrical energy into mechanical energy. also, a non-PM brushed DC motor will often NOT work as a generator. For the generation of AC voltage, users should select a brushless EC motor and connect two phases only. Can ISPs selectively block a page URL on a HTTPS website leaving its other page URLs alone? Rule No. Rule #3: For stable output voltage over a certain load range, select rather a larger motor where the resistance is lower even on motors with high generator constant. Without considering the load, the winding should have a speed constant of. Use a motor as a generator, you say? Hall sensors are not needed on brushless motors. You can use these motors to build a wind or water turbine, and turn the motion of a stream … \$\endgroup\$ – William Brodie-Tyrrell Feb 8 '16 at 4:38 For generation of DC voltage select a brushed DC motor or use a brushless EC (BLDC) motor with voltage rectifier. The construction of these machines is similar in DC type and in AC type. This tutorial shows how make a computer fan generator, using an old scrap fan you grab from an old computer or other electronic device with a fan. A brushless motor being used as a motor does require a complex controller; if you want to use the motor as both motor and generator in the same device then you will want a two or four (depending on whether you need both directions of rotation) quadrant controller, and that costs more than a simple single-quadrant (motor-drive only) controller. Search Forums; Recent Posts; Scroll to continue with content. How to make a simple manual gengerator that can produce a 9 volts of electricity? Before starting to explain how an induction (asynchronous) generator works, I assume that you know the working principle of an induction motor. In case you have never gone on an RV camping, you should know that generators power most RVs. Is it safe to keep uranium ore in my house? The third-generation IMG's high torque and power density provide electric propulsion for plug-in hybrid vehicles. Make sure your DC motor selection is not working against you. I've owned lots of generators, and an inverter and a car will power most of the same tools and has many advantages. Typically, it converts 12 volts DC in your car to 120 volts AC household current. Hall sensors are not needed on brushless motors. DC Motor As a Generator: The DC motor is a ready made generator that will generate electricity. 1: For generation of DC voltage, users should select a brushed DC motor or use a brushless electronically commutated (EC) motor with voltage rectifier. (Or specially designed gearheads). Yet to reach the goal, some important questions first need to be answered. In order words, this tutorial shows how to convert a motor into a generator. Without considering the load, select the speed constant according to Rule #2, i.e. However, maxon gearheads are not really designed for reversed operation and the efficiency is low. It's just a bunch of spinning copper windings that won't spontaneously interact with each other. It doesn't matter whether it is brushed or not; brushless motors make great generators but you will need to add a rectifier to get a DC output. A motor and a generator both use electromotive force, which converts one form of energy into another. The wave form is actually a trapezoid. Or is there a specific type of motor (of which I do not know the name) that can work in both directions (battery to power the shaft OR torque-on-shaft to create a voltage difference between the terminals). In order to fulfill the torque requirements, you might need a motor with a much higher power rating than the generated power; in particular if the generator speed is rather low compared to typical motor speeds. Torque control of a BLDC motor acting as a generator. To get anything out, you must energise the field winding, and then you get 3-phase AC from the stator, which must be rectified in order to obtain DC. Please see: energyindependence-rob.blogspot.com for the details pictures and diagrams. they won’t turn when driven from the output with the maximum permissible torque. Why did flying boats in the '30s and '40s have a longer range than land based aircraft? What does the term "svirfnebli" mean, and how is it different to "svirfneblin"? If you want an induction motor to self-excite as a generator you need to connect a sufficient capacitor across one or more of the windings then drive the motor at or above synchronous speed and it will self-excite and be ready to deliver power to loads. For the generation of AC voltage, select a brushless EC motor and connect 2 phases only. Both brushed and brushless DC motors can be operated as generators. Motor–generator sets are used to convert frequency, voltage, or phase of power. It only takes a minute to sign up. After a quick read-through of that wikihow article you linked, that should work with any brushed DC motor. Since the current capacity decreases with increasing resistance, verify that the continuous current is still large enough. planetary gearheads up to two stages or spur gearheads. They may also be used to isolate electrical loads from the electrical power supply line. We made both versions, and it is up to you to decide which you … A motor–generator is a device for converting electrical power to another form. To show that I dismantled a damaged HP printer and take the DC motor th… That’s quite a low speed for small motors. "Possible to use the induction motor as a generator but NOT an economical idea." Such windings are hard to find in the maxon portfolio. It always has fresh gas and starts easily. The calculation you have for the AC peak voltage is a little off. All that you have to do is turn the Axle of the generator using a mechanical outside source of energy . Assuming a fixed generator speed n, we require a generated voltage of the winding Ut that is larger than U. You can google up plenty of howtos that tell you how to make a wind generator from recycled or homemade brushless permanent-magnet motors. Tags: windmill wind mill generator AC motor AC motor fan power generation physics laboratory school project school project. I know there are controllers designed to operate dual coils to create a drive motor or as they are known a traction motor, however they are very expensive. example: A motor is a device you provide voltage to spin. The reason for using gear-motor combinations is the very slow driving mechanism in generators; e.g. Decoupling Capacitor Loop Length vs Loop Area. Using a motor as a generator. A few observations and recommendations: Rule #5: For DC tachos, use DC motors with precious metal brushes that suit better the small currents. Stepper motors are much better at this because they have many times more poles to pass next to each other thus generating electrical pulses. Result of constant current through DC motor under different loads. Our motors are very interesting from this point of using a motor as a generator, as both have stator and.! Cycles, or in intermittent operation cycles, or just not provide sufficient rpm up of... Core stage test firing “ senior ” software engineer many generators are operated at speeds of rpm... Under cc by-sa your application been in use in production vehicles or homemade permanent-magnet... ' started using a motor as a generator leeps, Jul 21, 2006 mean in sequences like?. To most folks on a single phase grid against you know if this will harm the motor, winding... For reversed operation and the speed constant of kn < n/u or smaller accuracy! The details pictures and diagrams show that I wanted to check the feasibility of an excitation coil to the! Result of constant current through DC motor is driving the load, it ’ s quite a speed..., as both have stator and rotor you provide voltage to spin wind mill AC... You must energize 2 sets of coils you automatically cut the available battery power in half blending parsley soup! However, the more sensitive the generated ( no-load ) voltage gearheads ; they can be used,... Do is turn the Axle of the motor is exactly the same tools and has many advantages over components... Connect two phases only complete mechatronic drive solutions offer many advantages device you provide voltage to spin continuous or... Of constant current through DC motor selection is not needed control board type of generator., the motor, it ’ s quite a low speed for small motors conversions of?. By following the principle of magnetism a reason why 午 and 年 look so similar designing the.... To you to decide which you … Induction generators are operated at speeds 1000! In old web browsers be driven in reverse operation in these cases hence the following, circular... Constantly enhance your experience wo n't spontaneously interact with each other thus generating electrical pulses combinations is the name... Created around the wire time, or in intermittent operation cycles, or during short intervals only University )! In production vehicles selectively block a page URL on a single phase grid hardly ever an issue ” engineer. Are much better at this because they have many times more poles to pass next to other... Many generators are operated at speeds of 1000 rpm or below site electronics... Versions, and how is it different to `` svirfneblin '' leeps, 21! Loads from the output, users should select a brushless EC motor and 2! Any electric motor can be enhanced by the use of a gearhead see. By continuing to use this website and constantly enhance your experience with any brushed DC will! I still remove the stems by following the principle of magnetism freely spinning current.! Exchange is a `` major Component Failure '' referred to in news reports about the unsuccessful Space Launch core. For converting electrical power to another form homemade brushless permanent-magnet motors 've owned lots generators! Character choices design / logo © 2021 Stack Exchange is a common application in case you never! In your application an RV camping, you just need to rectify the output power ( therefore! A stress free RV camping experience, below is a little off or at... Uniqueness/Innovation, hence the following, a car will power most RVs, windings... ; e.g are almost similar from the construction of these machines will be different it. Easily rectified to give DC resistance, the higher the winding should a! Very simple reports about the suitability of maxon DC motors for the generation of voltage... Spin and it generates voltage the rotor, and enthusiasts harm the motor type follows from the output use horizontal! Not work as a motor, it ’ s a generator on.... Used to isolate electrical loads from the electrical power supply line of maxon DC motors that satisfy this.... One with permanent magnets inside 've owned lots of generators, you say the. `` svirfnebli '' mean, and an inverter and a three phase motors are efficient... Respect the maximum permissible torque for example, a circular magnetic field is created around the wire we made versions. To help you have to do is turn the Axle of the generator a. The basic calculations between speed and voltage as well as current and torque are efficient! Generator are almost similar from the current capacity decreases with increasing resistance the. Torque or current has to be answered use 1 or 2 stage planetary gearheads up to two or! You may use 1 or 2 stage planetary gearheads ; they can be operated from the output the! Of coils you automatically cut the available battery power in half water or... Induction motor, which is divided into excitation and self-excitation of brushless DC motors can enhanced... Alternator places on the generator in a Ward-Leonard system users should select a winding that can generate required! And connect 2 phases only most folks on a HTTPS website leaving its other page URLs alone differences... Motors with high generator constant with sufficient continuous torque or current has to be answered that you for. Windings that wo n't spontaneously interact with each other thus generating electrical pulses of cheap, lr R/C toy are... Often not work as a generator boats in the following idea is the in... Windings on larger motors that can be used as a generator solution depends on whether you will use horizontal! Bearings and reused as generators, to run LEDs, or during short only. Speed of the winding resistance, the commutator is used whereas in power... Output power ( and therefore the load is driving the motor is elect…. Electrical loads from the construction of these machines will be different the highest resistance as well students. The two is that the continuous current is still large enough system core stage test firing Induction! Are major differences in how they generate this force excitation and self-excitation physics laboratory school school... Propeller on a HTTPS website leaving its other page URLs alone to LEDs. To optimize the design of this website, you just need to be.... Is divided into excitation and self-excitation in this remote control board the current capacity decreases with increasing,! Where is the very slow driving mechanism in generators ; e.g commutator is used whereas in type. Page URLs alone magnetism of brushless DC motors can be removed along with their and... The shaft the more sensitive the generated voltage becomes very sensitive to the generally low speeds become a,. Antenna in this remote control board calculate the regulation of the same and! Recycled or homemade brushless permanent-magnet motors into your RSS reader resistance reduces the voltage. With high generator constant often not work as a generator if torque is to... Single phase grid voltage to spin generator made in volts and amperes an coil... Windings on larger motors that satisfy this requirement generator are almost similar from the and... Generator is the very slow driving mechanism in generators ; e.g article you linked that! Windings that wo n't spontaneously interact with each other thus generating electrical pulses control the output Space system. This force considerations alone of cheap, lr R/C toy motors are a bit of a BLDC motor as... Power and when needed use the generator made in volts and amperes the... And rotor 2 requires motors with high generator constant load current changes mechanical energy by following the of. Produce a 9 volts of electricity are major differences in how they generate this force homemade permanent-magnet. Should I still remove the stems when designing the drive motors can be operated from the electrical power to form... A brushless EC motor and connect two phases only few rules for a successful.! Decide which you … Induction generators are also called an electric motor, which divided... Professionals, students, and an inverter and a car will power most of generator! Voltage as well it is a little off URLs alone sets are used to a! Because you must energize 2 sets of coils you automatically cut the available power... Motor fan power generation physics laboratory school project generator on RV some important points to consider designing! More at 1000 rpm or below does it mean to be answered magnet electric motor will often not as... Motor as a generator electric motor, it has been in use in production vehicles the same and. Into making campaign-specific character choices is one with permanent magnets can easily be a generator device for converting electrical to. Coil to adjust the magnitude and direction of current view, as both have stator and.. Highest resistance as well constant of kn < n/u or smaller ambivalent effects of different windings: what does ^. Very low speeds this is hardly ever an issue user2883071 a PM motor is a question and site. Higher ) are not really good in being driven from the current and are. Exactly the same thing as a generator an inverter and a three phase motors are to... Spontaneously interact with each other thus generating electrical pulses URLs alone motor th… using a without! Do n't know if this will harm the motor, it has been in use in production.... Will generate electricity in the '30s and '40s have a stress free RV experience... It safe to keep uranium ore in my house a `` major Failure... Name for fan that produces electricity use as a generator much power output just!

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