Rotary Frequency Converters
(also called "Motor-Generator Sets" or MG Sets")
Rotary units convert incoming AC Power into rotary mechanical power (spinning motor), which transmits its rotary power to a generator, which converts its mechanical power into Electric AC Power. Rotary power is often described in terms of Horsepower, while Electrical power is described in Kilowatts (kW) or Kilovolt-Amperes (KVA).
Typical Characteristics
- More attuned to larger applications 10 KVA plus.
- Much better at starting motor loads.
- Rugged floor mount construction
- Generally, fixed output frequency
- Costs do not increase linearly with power; e.g., 3x power = 1.5x cost.
- Harmonic distortion and noise on input power is not passed to the output.
- Can source heavy overload currents 2-4X for short periods of time.
- Full load efficiency up to 90+% on large units
Rotary Frequency Converter: Belt-Coupled
- Economical; connected by belts/pulleys
- Power Ratings 1-500 KVA
- Complete electrical isolation from harmonics, spikes.
- High Efficiency Induction Motor
- Synchronous Generator w/voltage regulator.
- Tight Frequency Regulation (+/-1%)
- Waveform: THD < 5%
Rotary Frequency Converter: Common Shaft
- Precision; exact frequency output.
- Power Ratings: 1-1000++ KVA
- Complete electrical isolation from harmonics, spikes.
- Low maintenance.
- Synchronous Motor
- Synchronous Generator w/voltage regulator.
- Waveform: THD < 5%
Rotary Frequency Converter: Power Line Isolator/Conditioner
- Complete isolation between the load and input power
- Power Ratings: 2.5 to 500 KVA
- Maintains approx. 100 milliseconds of ride-through during power outages.
- High Efficiency Induction Motor or Synchronous Motor
- Synchronous Generator w/voltage regulator.
- Waveform: THD < 5%
Rotary Frequency Converter - Power Line Isolator/Conditioner product page