7.6.2 Slow Speed Cyclo Converter Parameters
Slow Speed: The Slow Speed parameter selects the speed of motor operation when slow speed is selected. When set to
Off, slow speed operation is disabled.
Slow Speed Current Level: The Slow Speed Current Level parameter selects the level of current applied to the motor during slow speed
operation. The parameter is set as a percentage of motor full load amps (FLA). This value should be set to
the lowest possible current level that will properly operate the motor.
Slow Speed Time Limit: The Slow Speed Time Limits parameter sets the amount of time that continuous operation of slow speed may
take place. When this parameter is set to OFF the timer is disabled. This parameter can be used to limit the
amount of continuous slow speed operation to protect the motor and/or load.
z NOTE: The Slow Speed Time Limit includes the time used for the Slow Speed Kick if kick is enabled.
z NOTE: The Slow Speed Time Limit resets when the motor is stopped. This timer does not prevent the
operator from stopping and re-starting the motor which can result in the slow speed operation time of the
motor being exceeded.
Slow Speed Kick Level: The Slow Speed Kick Level sets the short-term current level that is applied to the motor to accelerate the motor for
slow speed operation. The Slow Speed Kick feature is disabled if it is set to off. Slow Speed Kick can be used to
"break loose" difficult to start loads while keeping the operating slow speed current level lower.
This parameter should be set to a midrange value and then the Slow Speed Kick Time should be increased in 0.1
second intervals until the kick is applied long enough to start the motor rotating. If the motor does not start
rotating with the set Slow Speed Kick Level increase the level and begin adjusting the kick time from 1.0 seconds
again.
If the motor initially accelerates too fast then reduce the Slow Speed Kick Level and/or reduce the Slow Speed
Kick Time.
Slow Speed Kick Time: The Slow Speed Kick Time parameter sets the length of time that the Slow Speed Kick current level is applied to
the motor at the beginning of slow speed operation. After the Slow Speed Kick Level is set, the Slow Speed Kick
Time should be adjusted so that the motor starts rotating when a slow speed command is given.
If the motor initially accelerates too fast then reduce the Slow Speed Kick Level and/or reduce the Slow Speed
Kick Time.
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7 - THEORY OF OPERATION
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