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Belt-coupled Motor Generator (MG) Sets

Belt coupling is the simplest and least expensive method of coupling the drive motor to the Georator generator, using drive belts and pulleys. This method not only transfers the energy from motor to generator, but also is used to change the frequency by pulley ratios. The motor generator set converts frequencies of 50Hz, 60Hz, and 400Hz up to 500KVA power capacity. Phase and/or voltage conversion are inherently available in this process. Standard designs, including a motor starter, motor, breaker, and generator mounted to a compact skid, are available with short-lead times.

Features of Louis Allis Belt-coupled Motor Generator Sets

  • 50 to 60 Hz, 60 to 50 Hz designs
  • Power ratings: 10 - 500 KVA
  • Complete electrical isolation from harmonics, spikes.
  • High-efficiency induction motor
  • Synchronous generator w/voltage regulator
  • Tight frequency regulation (+/-1%)
  • Waveform: THD < 5%


  • Meters only, no starter or breaker
  • Weather/Acoustic enclosure

We can also provide custom designs for your specific requirements. If you are a contractor or buyer interested in MG sets but you are not sure what you need, our expert engineers are here to guide you through the specifying process.

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belt driven motor generator

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