Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1987-01-12
1989-05-09
Smith, Jr., David
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
318811, H02M 7527, H02P 540
Patent
active
048294160
ABSTRACT:
In a three phase inverter which is composed of transistors turned on or off in accordance with the PWM control, the pulse widths of PWM gate signals for the transistors are determined in accordance with the magnitudes of two of the three phases of the current to be output by the inverter.
The load of a processor for generating the gate signals can be reduced to the great extent, and in addition thereto, the waveform of the output current of the inverter is much improved.
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Sen et al., "Induction Motor Drives with Microcomputer Control System", Conference: IAS Annual Meeting, 1980, Cincinnati, OH, USA, Sep. 22-Oct. 3 1980.
Hokari Sadao
Inaba Hiromi
Shima Seiya
Takahashi Hideaki
Tobita Toshimitsu
Hitachi , Ltd.
Smith Jr. David
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