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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 Method with Pure Integrator.
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pone.0130923.g001: Torque Estimation Method with Pure Integrator.

Mentions: Instead of using actual stator voltages, reference voltages can be used to eliminate costs of voltage transducers, so stator flux linkages of the IPMSM can be estimated as:{ψ^α=∫(Vα*−Rsiα)dtψ^β=∫(Vβ*−Rsiβ)dt(2)where , are reference voltages. And the estimated electromagnetic torque can be calculated from the estimated flux linkages as:T^e=32p(ψ^αiβ−ψ^βiα)(3)where p is the pole pairs number of IPMSM. The schematic diagram of the described torque estimation method is shown in Fig 1.


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 Method with Pure Integrator.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0130923.g001: Torque Estimation Method with Pure Integrator.
Mentions: Instead of using actual stator voltages, reference voltages can be used to eliminate costs of voltage transducers, so stator flux linkages of the IPMSM can be estimated as:{ψ^α=∫(Vα*−Rsiα)dtψ^β=∫(Vβ*−Rsiβ)dt(2)where , are reference voltages. And the estimated electromagnetic torque can be calculated from the estimated flux linkages as:T^e=32p(ψ^αiβ−ψ^βiα)(3)where p is the pole pairs number of IPMSM. The schematic diagram of the described torque estimation method is shown in Fig 1.

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.