Tachometerless Motor Speed Control

Posted on Nov 6, 2012

This provides bidirectional speed regulation for small motors and requires no tachometer. The voltage th

Tachometerless Motor Speed Control
Click here to download the full size of the above Circuit.

at summing amplifier IC1A applies to the motor"s windings equals: where Vc is the command voltage and IM is the motor current. If you set the motor"s winding resistance and brush resistance (RM) equal to: the command voltage will be proportional to the motor winding"s counter emf. CI provides compensation. Set Rl"s value so that it equals 5 to 10% of RM"s value. You can generally find RM"s value in a motor"s spec sheet.

Leave Comment

characters left:

New Circuits



Popular Circuits

Car 12V to +-20V DC converter
High Quality Valve Amplifier
555 Based Alarm Circuit
51 surround amplifier circuit schematic
6 Channel Auto Reverse Sequential Disco Running Lightss
Voltage Controlled Switch
Variable PSU
Frequency meter circuit
One group of integrated circuits using electrical circuit 555 when the load limit
ADC0809 and PC bus interface circuit