Motor speed adjusting apparatus

Details Motor speed adjusting apparatus Motor speed adjusting apparatus

H - Electricity

02

P

318/120

H02P 7/00 (2006.01) G05B 19/18 (2006.01) H02P 23/00 (2006.01)

Patent

CA 1124321

A MOTOR SPEED ADJUSTING APPARATUS ABSTRACT OF THE DISCLOSURE A motor speed adjusting apparatus comprises a motor, a motor speed setting device such as an up-down counter, a programmable divider a divisor of which is programmed by the motor speed setting device, a reference frequency signal genera- tor, a phase comparator which generates a d.c. voltage corres- ponding to a phase difference between a reference frequency signal and the output signal of the programmable divider, and a voltage controlled oscillator which oscillates at a frequency according to the output of the phase comparator. The motor speed is adjusted according to the output frequency of the os- cillator by a step deviation from the standard motor speed, and further that deviation is displayed by a display device control- led by the motor speed setting device. -0-

302041

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