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A Practical Torque Estimation Method for Interior Permanent Magnet Synchronous Machine in Electric Vehicles.

Wu Z, Lu K, Zhu Y - PLoS ONE (2015)

Bottom Line: The torque output accuracy of the IPMSM in electric vehicles using a state of the art MTPA strategy highly depends on the accuracy of machine parameters, thus, a torque estimation method is necessary for the safety of the vehicle.Moreover, by taking into account the non-ideal characteristic of the inverter, the torque estimation accuracy is improved significantly.The effectiveness of the proposed method is demonstrated through MATLAB/Simulink simulation and experiment.

View Article: PubMed Central - PubMed

Affiliation: School of Automotive Engineering, Tongji University, Shanghai, China; Sino-German School for Postgraduate Studies, Tongji University, Shanghai, China.

ABSTRACT
The torque output accuracy of the IPMSM in electric vehicles using a state of the art MTPA strategy highly depends on the accuracy of machine parameters, thus, a torque estimation method is necessary for the safety of the vehicle. In this paper, a torque estimation method based on flux estimator with a modified low pass filter is presented. Moreover, by taking into account the non-ideal characteristic of the inverter, the torque estimation accuracy is improved significantly. The effectiveness of the proposed method is demonstrated through MATLAB/Simulink simulation and experiment.

No MeSH data available.


Torque Estimation Results with the Reference Current  = 100A and the Reference Current  = 0A at 2000rpm.
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pone.0130923.g007: Torque Estimation Results with the Reference Current = 100A and the Reference Current = 0A at 2000rpm.

Mentions: Fig 7 shows the estimation results at 2000rpm with the reference current of 100A and the reference current of 0A. The actual torque output is from 48Nm to 55Nm. The average estimation error of the proposed method is within 1Nm. The average error of the second method is 6Nm and is smaller than the error when the motor is operating in the low speed range, because the BEMF increases with the speed and makes voltage errors relatively smaller. The estimated result of the third method fluctuates from 100Nm to 200Nm.


A Practical Torque Estimation Method for Interior Permanent Magnet Synchronous Machine in Electric Vehicles.

Wu Z, Lu K, Zhu Y - PLoS ONE (2015)

Torque Estimation Results with the Reference Current  = 100A and the Reference Current  = 0A at 2000rpm.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4482678&req=5

pone.0130923.g007: Torque Estimation Results with the Reference Current = 100A and the Reference Current = 0A at 2000rpm.
Mentions: Fig 7 shows the estimation results at 2000rpm with the reference current of 100A and the reference current of 0A. The actual torque output is from 48Nm to 55Nm. The average estimation error of the proposed method is within 1Nm. The average error of the second method is 6Nm and is smaller than the error when the motor is operating in the low speed range, because the BEMF increases with the speed and makes voltage errors relatively smaller. The estimated result of the third method fluctuates from 100Nm to 200Nm.

Bottom Line: The torque output accuracy of the IPMSM in electric vehicles using a state of the art MTPA strategy highly depends on the accuracy of machine parameters, thus, a torque estimation method is necessary for the safety of the vehicle.Moreover, by taking into account the non-ideal characteristic of the inverter, the torque estimation accuracy is improved significantly.The effectiveness of the proposed method is demonstrated through MATLAB/Simulink simulation and experiment.

View Article: PubMed Central - PubMed

Affiliation: School of Automotive Engineering, Tongji University, Shanghai, China; Sino-German School for Postgraduate Studies, Tongji University, Shanghai, China.

ABSTRACT
The torque output accuracy of the IPMSM in electric vehicles using a state of the art MTPA strategy highly depends on the accuracy of machine parameters, thus, a torque estimation method is necessary for the safety of the vehicle. In this paper, a torque estimation method based on flux estimator with a modified low pass filter is presented. Moreover, by taking into account the non-ideal characteristic of the inverter, the torque estimation accuracy is improved significantly. The effectiveness of the proposed method is demonstrated through MATLAB/Simulink simulation and experiment.

No MeSH data available.