Method and apparatus for controlling reflected voltage using a m

Details Method and apparatus for controlling reflected voltage using a m Method and apparatus for controlling reflected voltage using a m

1997-10-01

1999-06-15

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 41, 363132, 318811, H02M 7521, H02P 540

Patent

active

059128135

ABSTRACT:
A method and apparatus for eliminating greater than twice motor over voltage by altering modulating signals provided to a PWM controller which in turn provides firing pulses to a PWM inverter. The modulating waves are altered by either tying them to positive or negative DC buses or limiting their maximum magnitudes when their instantaneous characteristics are known to cause greater than twice overvoltage. The modulating waveforms are altered in a symmetrical fashion so that the resulting fundamental terminal voltages remain essentially unchanged.

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patent: 5736825 (1998-04-01), Kaura et al.
patent: 5811949 (1998-09-01), Garces

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