Parker AC890PX Series, Engineering Reference

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D-92
A p p e n d i x D : P r o g r a m m i n g
AC890PX AC Drive
PATTERN GEN
SETUP::MOTOR CONTROL::PATTERN GEN
Designed for all Motor Control Modes.
The pattern generator function block allows you to configure the Drive PWM (Pulse Width Modulator) operation.
Parameter Descriptions
RANDOM PATTERN PREF: 73.01 Default: TRUE Range: FALSE / TRUE
Designed for all Motor Control Modes, except PMAC Control Mode.
This parameter selects between random pattern (quiet motor noise) or the more conventional fixed carrier PWM strategies. When TRUE, random
pattern is enabled.
FREQ SELECT PREF: 73.02 Default: 3000 Hz Range: 2000 to 6000 Hz
For all motor control modes, except PMAC control mode:
This parameter selects the PWM switching frequency of the output power stack.
The higher the switching frequency, the lower the level of motor audible noise. However, this is only achieved at the expense of increased
drive losses and reduced stack current rating.
For PMAC control mode (for test purposes):
This parameter selects the PWM switching frequency of the output power stack if the parameter PWM FREQ PMAC is set to ‘OTHERS’.
The range is 2000 to 4000Hz.
DEFLUX DELAY PREF: 73.03 Default: 2.0 s Range: 0.1 to 10.0 s
Designed for all Motor Control Modes, except PMAC Control Mode.
Sets the minimum allowed delay between disabling and then re-enabling PWM production (i.e. stopping and starting the drive).
DRIVE FREQUENCY PREF: 73.04 Default: —.xx Hz Range: —.xx Hz
The output frequency provided to the motor.
ACTUAL PWM FREQ PREF: 73.05 Default: —. Hz Range: —. Hz
The actual pwm switch frequency applied to the motor.
This can reduce in overload conditions in all Control Mode, except PMAC Control Mode.