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Waseem
Level 1
Level 1
First reply posted 5 sign-ins First question asked

We have created parameter file using MCEwizard and MCEdesigner, we have disabled the PFC by accessing the register FeatureID_selectH and making bit 0 to 0. The leg current sense is also left open just the 6 pwm outputs and 3 hall inputs are connected between motor and the controller, gate kill is also disabled. By ignoring the PFC and the non essential components we are able to make the motor rotate by just 1 step rarely and then stop, sometimes the mosfet gets damaged, I am sharing the parameter file and .mc2 file for your reference. Kindly suggest the vital parameters in order to run the motor

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1 Solution
Krupashankar
Moderator
Moderator
Moderator
500 replies posted 50 likes received 25 likes received

Hi @Waseem,

Can you please let us know the error when operating the motor?

can you please try interchanging the hall sensor cables in all possible patterns? 

HALL A- HALL B- HALL C

HALL B- HALL C-HALL A

HALL C-HALL A- HALL B

Please ensure the following parameters

Ques-83 Motor 1 Current Input Scaling

Ques-84 Internal Current Feedback amplifier gain

Ques85- Motor 1 Current Input to ADC Offset Voltage 

are according to the  3-Phase Smart Gate Driver current sensing circuit.

 

Thanks,

Krupashankar

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3 Replies
Krupashankar
Moderator
Moderator
Moderator
500 replies posted 50 likes received 25 likes received

Hi @Waseem,

Please connect leg current sensing as the current feedback is very essential for the FOC operation in MCE. Improper current sensing will damage the MOSFET and we would recommend enabling gate kill fault to protect the device from overcurrent.

In case of using a hall sensor please measure the hall sensor angle offset (Ques 97 - Hall Angle Offset) If the problem still exists please try interchanging hall sensor cables.

Could you please share the motor datasheet this will help in identifying the correct motor parameters for MCE Wizard. If motor datasheet is not available please refer to the document How to Measure Motor Parameters for identifying the motor parameter and share the schematics of the power board.

 

Thanks,

Krupashankar

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Waseem
Level 1
Level 1
First reply posted 5 sign-ins First question asked

Hi,

Thanks for your reply. From your insights we modified our design and parameters bit still we are unable to make the motor rotate. The following are the measured motor parameters

1. Hall angle offset we got 120 deg obtained from the vendor,
2. Back emf is found to be 4.01V,
3. Per phase inductance is 0.133 mH and per phase resistance is 0.1 ohm.

I have shared the .mc2 file and power board schematics for your reference. We are using different power board  for H bridge and current sensing . In the current sense circuit we only the first OP-amp is taken into account the "Ibus_AN0" is given to ISSU pin in microcontroller.

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Krupashankar
Moderator
Moderator
Moderator
500 replies posted 50 likes received 25 likes received

Hi @Waseem,

Can you please let us know the error when operating the motor?

can you please try interchanging the hall sensor cables in all possible patterns? 

HALL A- HALL B- HALL C

HALL B- HALL C-HALL A

HALL C-HALL A- HALL B

Please ensure the following parameters

Ques-83 Motor 1 Current Input Scaling

Ques-84 Internal Current Feedback amplifier gain

Ques85- Motor 1 Current Input to ADC Offset Voltage 

are according to the  3-Phase Smart Gate Driver current sensing circuit.

 

Thanks,

Krupashankar

0 Likes