Method and circuit arrangement for controlling an asynchronous m

Details Method and circuit arrangement for controlling an asynchronous m Method and circuit arrangement for controlling an asynchronous m

1978-11-27

1981-04-21

Rubinson, Gene Z.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318807, 318812, H02P 540

Patent

active

042635420

ABSTRACT:
Method for controlling the speed and torque of an asynchronous machine fed through a static frequency changer with impressed intermediate current link, a control variable for the frequency of the current delivered by the frequency changer being formed from an electrical variable corresponding to a slip frequency value and an electrical variable corresponding to actual value of a frequency proportional to the rotor speed of the asynchronous machine which includes operating the asynchronous machine with constant flux in a region of constant maximal torque, and adjusting the flux in the machine, in a region of constant maximal power, as a function both of voltage at commutating capacitors of a self-commutating inverter and of a respective load condition of the asynchronous machine.

REFERENCES:
patent: 4041361 (1977-08-01), Cornell
patent: 4044284 (1977-08-01), Plunkett et al.
patent: 4044285 (1977-08-01), Plunkett et al.
patent: 4047083 (1977-09-01), Plunkett
patent: 4088934 (1978-05-01), D'Atre et al.
patent: 4088935 (1978-05-01), D'Atre et al.

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