Brushless DC motor control network

Electricity: motive power systems – Switched reluctance motor commutation control

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H02P 602

Patent

active

053172450

ABSTRACT:
A power control and commutation network for a brushless DC motor includes a first section proximate the motor and a second section remote from and connected to the first section by a pair of conductors. Included in the first section is a servo control amplifier defining a main motor power supply and, in the second section, a polyphase brushless DC motor, a commutation module, an auxiliary power supply for the module, motor rotor position sensors and a switching network, the motor stator coils being connected through the switching network to the conductors. The amplifier may have an amplitude modulated DC output and the output of a high frequency oscillator in the second section is AC coupled to the conductors and the auxiliary power supply with its input is AC coupled between the conductors. Alternatively, the amplifier is PWM and the auxiliary power supply includes a rectifier with an input connected across the conductors and a voltage regulator controlling the output voltage.

REFERENCES:
patent: 3577059 (1971-05-01), Kelly, Jr.
patent: 3584279 (1971-06-01), Krauthamer
patent: 3772588 (1973-11-01), Kelly et al.
patent: 4510422 (1985-04-01), Ogura
patent: 4583028 (1986-04-01), Angersbach et al.
patent: 4763049 (1988-08-01), Magee
patent: 4827196 (1989-05-01), Odell
patent: 5063338 (1991-11-01), Capel et al.
patent: 5136220 (1992-08-01), Philipp
patent: 5189349 (1993-02-01), Haga

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