Torque Ripple Description and Its Suppression through Flux Linkage Reconstruction

Zhong, Zaimin; Li, Junjie; Zhou, Shuihua; Zhou, Yifei; Jiang, Shang

doi:10.4271/2017-01-9077

Cited by 5 publications

(1 citation statement)

References 9 publications

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“…The main parameters of the PMSM used in this paper are shown in Table 2. The PMSM is a strong complex-coupling, high-order, and multivariable nonlinear system [19,20]. In order to realize the vector control of the motor, the mathematical model of the PMSM in the two-phase rotating reference frame (d-q axis) was used to establish the simulation model.…”

Section: The Modeling Of Pmsmmentioning

confidence: 99%

Torque Coordination Control of an Electro-Hydraulic Composite Brake System During Mode Switching Based on Braking Intention

Yang

Zhong³

et al. 2020

Energies

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The electro-hydraulic composite braking system of a pure electric vehicle can select different braking modes according to braking conditions. However, the differences in dynamic response characteristics between the motor braking system (MBS) and hydraulic braking system (HBS) cause total braking torque to fluctuate significantly during mode switching, resulting in jerking of the vehicle and affecting ride comfort. In this paper, torque coordination control during mode switching is studied for a four-wheel-drive pure electric vehicle with a dual motor. After the dynamic analysis of braking, a braking force distribution control strategy is developed based on the I-curve, and the boundary conditions of mode switching are determined. A novel combined pressure control algorithm, which contains a PID (proportional-integral-derivative) and fuzzy controller, is used to control the brake pressure of each wheel cylinder, to realize precise control of the hydraulic brake torque. Then, a novel torque coordination control strategy is proposed based on brake pedal stroke and its change rate, to modify the target hydraulic braking torque and reflect the driver’s braking intention. Meanwhile, motor braking torque is used to compensate for the insufficient braking torque caused by HBS, so as to realize a smooth transition between the braking modes. Simulation results show that the proposed coordination control strategy can effectively reduce torque fluctuation and vehicle jerk during mode switching.

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Section: The Modeling Of Pmsmmentioning

confidence: 99%