Driving circuit for controlling the speed of a motor in PWM and

Details Driving circuit for controlling the speed of a motor in PWM and Driving circuit for controlling the speed of a motor in PWM and

1992-02-06

1994-04-26

Wysocki, Jonathan

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388829, H02P 517

Patent

active

053074394

ABSTRACT:
A driving circuit for a motor such as a spindle motor used in a floppy disc driver, a hard disc driver, etc. includes an output stage driver which supplies a driving current to a motor to rotate at a constant rotation speed. The driving current is supplied to the motor in an off-and-on way in which the power loss is small at a starting state, while the driving current is supplied thereto in changing linearly in which there generates little noise at a stationary state.

REFERENCES:
patent: 4712050 (1987-12-01), Nagasawa et al.
patent: 4868469 (1989-09-01), Chan
patent: 4926104 (1990-05-01), King et al.

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