Drive circuit for a brushless direct-current motor

Details Drive circuit for a brushless direct-current motor Drive circuit for a brushless direct-current motor

1992-08-25

1993-06-15

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02P 602

Patent

active

052202585

ABSTRACT:
A drive circuit for a brushless direct-current motor, particularly a fan motor, which permits a flexible control or regulation of the power delivered to the direct-current motor depending on a desired or reference value. The drive circuit consists of power output stages which are supplied via a rectifier circuit direct from the a.c. supply, while the control of the power output stages is effected by a special control circuit. This control circuit is supplied via an auxiliary supply part from the a.c. supply. The control circuit delivers ramp-shaped output pluses each driving a control pulse for the motor current which comprises within each commutation phase a pulse that can vary from a symmetrical triangular form to a trapezoidal form. The driving circuit includes a restart circuit which supplies a separate supply voltage to an intermediate drive stage in a fashion which becomes intermittent if the motor is overloaded or blocked.

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M. Yamamoto et al., "High Voltage DC Brushless Motor Driven in PWM Mode" National Technical Report, vol. 37, No. 2, Apr. 1991.
The published data sheet of Harris Corporation for the HV-2405E Single Chip Power Supply, consisting of 12 pages and published Feb. 1990.

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