Control circuit for direct current brushless motors

Details Control circuit for direct current brushless motors Control circuit for direct current brushless motors

1986-04-11

1988-02-09

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, H02P 602

Patent

active

047243651

ABSTRACT:
An actuation circuit for direct current motors without collectors having at least one analogously operating galvanomagnetic sensor, of the Hall generator type which serves to control the currents in at least two end stage transistors. At least two differential amplifier stages having a high voltage gain and a high input resistance feed the amplified output signal of the galvanomagnetic sensor to the end stage transistors. Ohmic voltage dividers are provided for generating time pauses between the "on" states of the end stage transistors, these ohmic voltage dividers utilizing part of the voltage between the control terminals of the at least one galvanomagnetic sensor to form switching thresholds for the at least two differential amplifier stages. At least one capacitive coupling element is disposed between the outputs of the galvanomagnetic sensor and the inputs of the differential amplifier stages to transfer the alternating voltage component of the output signal of the galvanomagnetic sensor to the differential amplifier stages and to the direct voltage component.

REFERENCES:
patent: 3906320 (1975-09-01), Doemen
patent: 4030005 (1977-06-01), Doemen
patent: 4127799 (1978-11-01), Nakamura et al.
patent: 4230976 (1980-10-01), Muller
patent: 4374347 (1983-02-01), Muller
patent: 4379984 (1983-04-01), Muller
patent: 4473782 (1984-09-01), Reinhardt et al.

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