Control apparatus for PWM-controlled, variable voltage/variable

Details Control apparatus for PWM-controlled, variable voltage/variable Control apparatus for PWM-controlled, variable voltage/variable

1989-07-12

1990-05-08

Beha, Jr., William H.

Electricity: motive power systems

Induction motor systems

Primary circuit control

363 41, H02M 112

Patent

active

049241680

ABSTRACT:
In a PWM-controlled, variable voltage/variable frequency inverter, a pulse mode, which is identified by a number of voltage pulses within one cycle of an output AC voltage of the inverter, is changed in accordance with a frequency of the output AC voltage and an output AC voltage factor, which is a ratio of an output AC voltage to be produced by the inverter at that time to a maximum value of the output AC voltage which can be produced under a then-present value of a voltage of a DC voltage source for the inverter.

REFERENCES:
patent: 4480299 (1984-10-01), Muto et al.
patent: 4607321 (1986-08-01), Obi

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