Is a PM Generators output greater than an A/C motors input?

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SUMMARY

The discussion centers on the feasibility of using a permanent magnet (PM) generator powered by a 1/2 hp A/C motor to produce greater output wattage than the input required to run the motor. It is established that this scenario violates the law of conservation of energy, as the output cannot exceed the input. The conversation highlights the misconception that PM generators require less drive torque under load compared to conventional generators, emphasizing the need for a clear understanding of energy principles in electrical engineering.

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  • Understanding of the law of conservation of energy
  • Basic knowledge of electrical engineering principles
  • Familiarity with permanent magnet generators
  • Experience with A/C motors and their operational characteristics
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  • Study the characteristics and efficiency of A/C motors
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Electrical engineers, industrial mechanics, and anyone interested in the principles of energy conversion and generator efficiency.

imac567
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Hi, If I powered a permanent magnet generator like one found in a wind turbine, with let's say with a 1/2 hp A/C motor for example and directly coupled them together or used a gear reducer to increase the torque and rpm's, would the output watts created by the generator be greater than the wattage needed to run the input motor?
I'm asking this because what I've heard is that a pm generators required drive torque under load is much less than a conventional generator. I'm no electrical engineer by any means but I am and industrial mechanic specializing in rotating assemblies and and other boiler plant equipment and operations. Any help would be greatly appreciated.

Thank you, Mark
 
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No never you'd be violating the law of conservation of energy.
 

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