GE DS3800DSFC Multiplexer switch card

Active damping monitors the ZETA6104’s motor terminals and, like anti-resonance, uses the same current command modulator to modify motor current. Active damping uses a different method to extract information about rotor position error, however. The circuit’s gains are adjustable—you can configure it for your particular system. The DMTIND and DMTSTT commands scale the circuit for motor inductance and static torque, respectively. The DACTDP command scales the circuit for system inertia.

The active damping circuit uses this information for two purposes: 

1. It determines error in rotor position very accurately. 

2. It adjusts the gains of its feedback loop, based upon how much inertia the system has, and how much torque the motor can produce. If the rotor rings or vibrates, the active damping circuit will detect the corresponding error in rotor position. It will then modify the motor current command to damp the ringing.

Common problem

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