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User manual SID116 – 09.04.2015r. v.1.0 page 34
5.7
Dynamic braking (braking resistor)
5.7.1
Dynamic braking function.
SID116 is a 4Q driver. It allows motor control as well as normal operation as at generator mode. At normal mode
motor charge energy from power supply and exchange into mechanical energy driving mechanical system. At
generator mode motor is drive by mechanical system e.g. as a result of inertia or gravity mechanical energy
transmitted to motor shaft is convert into electric energy, which returns to power supply source through the
driver. The advantage of this solution is possibility of using returned energy for charging e.g. storage batteries
when motor operates at mobile application.
In case of electric motors energy returns in form of high power short pulses. Excess of energy from motor is
converted into thermal energy through braking resistor.
Picture. 28. Driver operation modes
Depend on driver voltage supply can be distinguished following driver operation modes:
I
Safe mode. Below 10 V driver voltage supply is too low and normal operation is not possible. SID116 turns
into safe mode (error: voltage supply <10 V).
II
Normal operation state. Driver transmits energy to motor.
III
Normal operation state. Driver is in return energy to power source mode.
IV
Normal operation state. Driver lose energy on braking resistor.
V
Safe mode. Voltage on motor is above safe level for driver. Driver turns into safe mode (error: Voltage
supply >36 V ). Motor plugging braking.
