User Manual
MCP Series
Brushed DC Motor Controllers
MCP Series User Manual
41
1.7.5 Voltage Clamp Setup and Testing
The circuits shown will need to be modiî‚żed for each application to make sure it properly
dissipates the regenerative voltages. Testing should consist of running the motor up to 25% of
its speed and then quickly slowing down without braking or E-Stop while checking the voltage
spike generated. Repeat, increasing the speed and power by 5% each time and checking the
voltage spike again. Repeat this process until 100% power is achieved or excessive over voltage
is detected. If over voltages are not clamped within requirements, either a lower Ohm resistor
will be required or additional DC Link capacitance will need to be added across B+ and B-.
Adding additional DC Link capacitance increases the amount of time the power resistor will have
to dissipate the regenerated power.