UM-YROTATE-IT-RX62T datasheet(45/54 Pages) RENESAS

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RX62T

YROTATE-IT-RX62T Motor Control Kit

UM-YROTATE-IT-RX62T Rev.1.00

Page 45 of 51

Jan 15, 2014

Troubleshooting:

At the stage i) if the motor doesn’t start or generate an alarm n°3, please set the speed to “0” to clear the alarm

which indicates that the software lost the phase. One first test is to increase or decrease the start-up current and the

minimum speed or the speed PI gains

When the motor is running, you can verify the number of pole pairs taking measurement of the effective speed, and

comparing it with the imposed frequency: the number of pole pairs n is: n=freq*60/speed; if you change the number

of pole pairs, remember to adjust also the minimum (and maximum) speed values.

Sometimes the no load start-up is easier if the inductance parameter is set to 0.

All the procedure is tuned to manage motors which maximum current is close to the inverter capability, which is

around 6Arms for the external power stage (shunt=0.05Ohm) and 3Arms for the internal power stage

(shunt=0.1Ohm); if you try to use it for very different motors, the results will be influenced by the losses in current

reading resolution.

Another possible trick when the things are very difficult, is trying to increase the flux feedback gain; sometimes I

used 500 instead of 100.

UM-YROTATE-IT-RX62T 数据表(PDF) 45 Page - Renesas Technology Corp