SLLU336A May   2021  – January 2022 MCT8316A

 

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3.4.1 Cycle by cycle current limit (ILIMIT)

Cycle by cycle current limit provides a means of controlling the amount of current delivered to the motor. This is useful when the system must limit the amount of current pulled from the power supply during motor start-up. The cycle by cycle current-limit limits the current applied to the motor from exceeding the configured threshold. Configure Cycle by cycle current limit [ILIMIT] to the rated peak phase current of the motor. Check the motor datasheet for the rated peak phase current in Amps. Use Equation 2 to choose the correct ILIMIT in volts.

Equation 2. ILIMIT V=Cycle by cycle current limitA×[CSA_GAIN] (vA)

If the motor is unable to reach the maximum speed, increase ILIMIT in steps until the motor reaches maximum speed.