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Delta Electronics VFD-EL series - Pre-Heat DC Current Duty Cycle

Delta Electronics VFD-EL series
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Revision 2016/03, 6ELE, V1.14
4-71
08.22
Pre-heat DC Current Duty Cycle Unit: 1%
Settings 0~100% Factory Setting: 0
This parameter is to set up the duty cycle of the pre-heat DC current input to the motor. 0% ~ 100%
corresponds to 0 sec to 10sec. When the setting is 0%, which means no output current from the motor drive.
While setting is 100%, there will be continuous output DC current. For example: when the setting of this
parameter is 50%, the cycle time is to input current to motor for 5 seconds and stop inputting for 5 seconds.
When MI #26 is enabled, this parameter will operate periodically with MI#26 until the motor drive start to run
motor or until MI#26 is disabled.
The figure below shows the sequential relationship, when MI=26 pre-heat can be auto-triggered, pre-heat DC
current is enabled and cycle time is 50%.
Pre-heat function works when Pr08-21 and Pr08-22 are not equal to 0.
When MI=26 is enabled (Auto-trigger Pre-heat function), MI =26 controls the start and stop of pre-heat
function.
When MI=26 is DISABLED, the pre-heat function will start when:
The motor drive stops its first operation.
The motor drive being powered on again to restart its operation.
The figure below shows the sequential relationship, when MI=26 pre-heat is disabled, pre-heat DC current is
enabled and cycle time is 50%. When the motor drive is stopped, the pre-heat function will start to output DC
current continuously.

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