Err trials on chat lines

Notice that the output from the VFD is a “rectangular” wave form. This rectangular waveform would not be a good choice for a general purpose distribution system, but is perfectly adequate for a motor.

If we want to reduce the motor frequency to 30 Hz, then we simply switch the inverter output transistors more slowly.

A capacitor operates in a similar fashion to a reservoir or accumulator in a plumbing system.

This capacitor absorbs the ac ripple and delivers a smooth dc voltage.

In other words, the faster the frequency, the faster the RPMs go.

While this would not be practical for plumbing systems, it works very well for VFD’s.

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  2. eric   •  

    While the flow has dried up, it's fun to watch some vintage Pinay talent from tropical Puerto Galera.

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