Method for improving the dynamic converter drive for a direct cu

Details Method for improving the dynamic converter drive for a direct cu Method for improving the dynamic converter drive for a direct cu

1985-07-25

1986-11-04

Dobeck, B.

Electricity: motive power systems

Generator-fed motor systems having generator control

Automatic generator control and/or with time-delay means

318317, 187 29R, 290 14, H02P 716

Patent

active

046212221

ABSTRACT:
The present invention concerns a method for improving the dynamic converter drive for a direct current elevator motor, in which the said motor is controlled by adjusting the magnetization of the generator linked to the lifting motor, such adjustment being achieved by means of a power electronics stage controlled by the elevator speed control system, using at least elevator speed and motor current consumption (or other current information proportional thereto) as feedback parameters. The intended improvement is achieved by measuring the current values at two different points in the magnetizing circuit of the generator by means of current measuring resistors, the result of the measurement at the first point indicating the generator magnetizing current value, which is supplied to the speed control unit of the speed control system, and the current measured at the second point representing the thyristor bridge current value, which is supplied to the circuit responsible for bridge changeover control in the said power electronics stage.

REFERENCES:
patent: 4143280 (1979-03-01), Kuehn, Jr. et al.
patent: 4171505 (1979-10-01), Shima et al.
patent: 4263988 (1981-04-01), Inaba et al.

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