Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1981-08-31
1984-02-14
Truhe, J. V.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, H02K 2900
Patent
active
044319533
ABSTRACT:
Commutation of the stator windings of a synchronous motor energized by a d.c. supply is controlled by comparison of voltages induced in two stator windings neither of which is a winding previously energized nor a winding about be energized. For speed control, turning on of the winding next energized can be delayed controllably. Motor current during start-up or overload can be limited by chopping, with a variable keying ratio, the d.c. supply connection to the motor during the first 80% of the period of energization of each stator winding. For reducing delay in starting, the rotor may be brought into a particular position automatically every time the motor is stopped or, in the case of a fuel pump motor for an injection type internal combustion engine, just before starting the engine through a supplementary contact controlled by the ignition key. Starting up can be provided by two initial pulses of commutation provided by means of an oscillator and two transistors.
REFERENCES:
patent: 4162435 (1979-07-01), Wright
patent: 4172990 (1979-10-01), Everett et al.
patent: 4262237 (1981-04-01), Gelenius
Schray Hans-Dieter
Taubitz Bernd
Wirtz Rainer
Bergmann Saul M.
Robert & Bosch GmbH
Truhe J. V.
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