Speed controllable drive for an asynchronous motor

Details Speed controllable drive for an asynchronous motor Speed controllable drive for an asynchronous motor

1975-04-10

1977-06-14

Rubinson, Gene Z.

Electricity: motive power systems

With flywheel or massive rotary member

318237, H02P 736

Patent

active

040300064

ABSTRACT:
A speed controllable three phase drive including an asynchronous motor having a slip ring rotor which can be connected to a three phase network and a d.c. motor mechanically coupled to the asynchronous motor with the d.c. motor fed through an uncontrolled rectifier connected to the slip ring of the asynchronous motor has a controlled static converter in series with the uncontrolled rectifier and d.c. motor. In an alternate embodiment the d.c. motor is replaced by a static converter motor fed by a controlled inverter connected to the uncontrolled rectifier. The controlled static converter is coupled to the three phase network to result in a three phase drive with a greater speed range and a lower reactive power requirement as compared to subsynchronous static converter cascades.

REFERENCES:
patent: 2201006 (1940-05-01), Kilgore
patent: 3327189 (1967-06-01), Hedstrom
patent: 3519909 (1970-07-01), Mathias et al.
patent: 3531701 (1970-09-01), Shibata
patent: 3551767 (1970-12-01), Shibata

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