Control of induction motor using PWM inverter

Details Control of induction motor using PWM inverter Control of induction motor using PWM inverter

1982-08-10

1984-12-25

Goldberg, E. A.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318802, H02P 742

Patent

active

044906668

ABSTRACT:
For controlling the rotational speed of an induction motor, an inverter is provided which converts direct current to alternating current and feeds the converted current to the motor. The output voltage and frequency of the inverter is controlled by a pulse-width modulated control device. The number of pulses contained in a half cycle of the inverter output voltage are changed every time the inverter output frequency reaches one of plural predetermined reference values. The plural predetermined reference values are adjusted in accordance with the DC supply voltage and/or with the motor current.

REFERENCES:
patent: 4281276 (1981-07-01), Cutler
patent: 4295189 (1981-10-01), Boys

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