Inj Braking - Parker AC890 Product Manual

INJ BRAKING

SETUP::MOTOR CONTROL::INJ BRAKING
Designed for VOLTS/Hz Motor Control Mode.
The injection braking block provides a method of stopping spinning induction motors without returning the kinetic energy of
the motor and load back in to the dc link of the Drive. This is achieved by running the motor highly inefficiently so that all the
energy stored in the load is dissipated in the motor. Thus, high inertia loads can be stopped without the need for an external
dynamic braking resistor.
Parameter Descriptions
DEFLUX TIME
Determines the time in which the Drive defluxes the motor prior injection braking.
FREQUENCY
Determines the maximum frequency applied to the motor for the low frequency injection braking mode. It is also clamped
internally so as never to exceed 50% of base speed value.
I-LIM LEVEL
Determines the level of motor current flowing during low frequency injection braking.
DC PULSE
Determines the duration of the dc pulse applied to the motor when injection braking is required for motor speeds below 20% of
base speed. The actual dc pulse time applied to the motor is dependent on the ratio of initial motor speed to 20% of base speed.
FINAL DC PULSE
Determines the duration of the final dc holding pulse applied to the motor after either low frequency injection braking or timed
dc pulse.
DC LEVEL
Determines the level of dc pulse applied to the motor during either the timed or final dc pulse.
890SD Standalone Drive - Frames G, H & J
PREF: 29.01
PREF: 29.02
PREF: 29.03
PREF: 29.04
PREF: 29.05
PREF: 29.06
Default: 0.5 s
Default: 9.0 Hz
Default: 100.00 %
Default: 2.0 s
Default: 1.0 s
Default: 3.00 %
Range: 0.1 to 20.0 s
Range: 1.0 to 500.0 Hz
Range: 50.00 to 150.00 %
Range: 0.0 to 100.0 s
Range: 0.0 to 10.0 s
Range: 0.00 to 25.00 %
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