Method and apparatus for connecting a static inverter to a...

Details Method and apparatus for connecting a static inverter to a... Method and apparatus for connecting a static inverter to a...

H - Electricity

02

P

318/88

H02P 1/16 (2006.01) H02P 1/30 (2006.01)

Patent

CA 1199674

ABSTRACT A method and apparatus for connecting a static inverter to a rotating motor, such as a three phase induction motor, is disclosed. A high frequency, low voltage signal is provided to the rotating motor through a suitable rectifier and inverter, which are in turn controlled by a suitable regulator and oscillator. The current is maintained at full load value, and the fre- quency is lowered in a controlled manner while the impedance of the motor is monitored. When the frequency of the inverter equals the rotational speed of the motor, the impedance of the motor increases dramatically. The supply voltage is then permitted to control the motor, and is allowed to rise to the rated value, causing the motor to be fully fluxed. Apparatus for implementing the method are disclosed.

412537

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