13
Dynamic braking
Operation
Warning
For frequent starts and stops, short the inhibit terminals,
decelerate to a minimum speed, or apply a dynamic brake to
the motor. Do not use any of these methods for emergency
stopping. They may not stop a drive that is malfunctioning.
Removing AC line power (both L1 and L2) is the only
acceptable method for emergency stopping.
Frequent starting and stopping can produce high torque. This
may cause damage to motors, especially gearmotors that are
not properly sized for the application.
Dynamic braking may be used to rapidly stop a motor (Figure 9).
For the RUN/BRAKE switch, use a two pole, two position switch
rated for at least 15 amps at 180 VDC. For the dynamic brake
resistor, use a 40 watt minimum, high-power, wire-wound
resistor.
Sizing the dynamic brake resistor depends on load inertia, motor
voltage, and braking time. Use a lower-value, higher-wattage
dynamic brake resistor to stop a motor more rapidly.
All manuals and user guides at all-guides.com
