About the spindle output(U/V/W) in TPIC2060

Hello,

My customer is asking about spindle output(U/V/W) in TPIC2060.

They will change from spindle acceleration to CAV(Constant Angular Velocity) control by host controller.

At changing timing, the spindle outputs became to sin curve while about 20msec..

(Please refer attached captured waveform.)

When they used TPIC2050 as same application, this phenomenon is not be happened.

(Question)

(1) Is this phenomenon from unique specification in TPIC2060 ?

(2)Why isn't this phenomenon happened on TPIC2050?

(3) Due to solve this phenomenon, is there something method or idea in TPIC2060 ?

Regards,

Tao_2199

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