Brushless direct current motor

Details Brushless direct current motor Brushless direct current motor

1993-09-24

1994-09-20

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02P 602

Patent

active

053492757

ABSTRACT:
The stator winding of a brushless D.C. motor receives two current pulses per 360.degree.-el. of rotor rotation, each current pulse being furnished via a respective current path. Each current path contains at least one power transistor switch having conductive and non-conductive states. These states are determined by respective driver transistor switches; when the driver transistor switch is in a high-output-impedance state the respective power transistor switch is rendered conductive, but when in the low-output-impedance state it renders the power transistor switch non-conductive. In various ways disclosed herein measures are taken to prevent the power transistor switches of both current paths from being simultaneously conductive. This may be accomplished using inherent or discrete base-emitter capacitances so connected that a power transistor switch is switched off abruptly but switches-on only after the elapse of a predetermined delay. Alternatively, the Hall voltage produced by the motor's rotor-position-sensing Hall cell may be applied to comparators such that the power transistor switches are not even commanded to conduct except during respective periods each shorter than 180.degree.-el.

REFERENCES:
patent: 3559013 (1971-01-01), Burch et al.
patent: 3559014 (1971-01-01), Rakes
patent: 3873898 (1975-03-01), Muller
patent: 3887844 (1975-06-01), Yoshida
patent: 3898544 (1975-08-01), Tanikoshi
patent: 3909690 (1975-09-01), Sugiura
patent: 3988652 (1976-10-01), Endo et al.
patent: 4070606 (1978-01-01), Morozumi et al.
patent: 4105940 (1978-08-01), Kuhnlein
patent: 4119895 (1978-10-01), Muller
patent: 4135120 (1979-01-01), Hoshimi et al.
patent: 4292575 (1981-09-01), Kuhnlein et al.
patent: 4296362 (1981-10-01), Beasley
patent: 4347464 (1982-08-01), Park et al.
patent: 4356437 (1982-10-01), Saito et al.
patent: 4365187 (1982-12-01), McDaniel et al.
patent: 4393339 (1983-07-01), Kimura
patent: 4403174 (1983-09-01), Miyazaki et al.
patent: 4449081 (1984-05-01), Doemen
patent: 4484114 (1984-11-01), Ebbs
patent: 4535275 (1985-08-01), Muller

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