Modified PWM Direct Instantaneous Torque Control System for SRM

Cheng, Yuhua

doi:10.1155/2021/1158360

Cited by 9 publications

(7 citation statements)

References 31 publications

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“…Figure 4 shows the three working states of the drive circuit and the drive signal of the power tube.  according to the region of the rotor position and (11,13), and then applies the obtained duty cycle to the PWM signal generator to generate the corresponding PWM drive signal to control the power tube. Figure 5 is a control block diagram of the segmental PWM duty cycle analysis method based on current chopping control.…”

Section: B Analytical Formula Of Pwm Duty Cycle In the Region θ2<θ<θ3mentioning

confidence: 99%

“…Y. Cheng and C. Zhao combined both direct instantaneous torque control (DITC) and PWM control with segmented control. The results show that the proposed method can reduce the inherent torque ripple [13], [14]. Scholars also proposed a new active vibration cancellation (AVC) control for variable-speed SR motor drives under digital PWM control to suppress the vibration that occurs on the stator body during commutation [15].…”

Section: Introductionmentioning

confidence: 99%

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An Analytic Method of Segmented PWM Duty Cycle for Switched Reluctance Motor

Huang

et al. 2023

Trans. Electr. Mach. Syst.

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In view of the large current peak and torque ripple in the actual current chopping control of switched reluctance motor, a segmented PWM duty cycle analysis method of switched reluctance motor based on current chopping control is proposed in this paper. The method realizes the control of the winding current by adjusting the average voltage of the two ends of the winding in one cycle through the PWM duty cycle. At the same time, according to the inductance linear model, the conduction phase is divided into a small inductance region and an inductance rising region, and the analytical formulas of PWM duty cycle in the two regions are deduced respectively. Finally, through matlab/simulink simulation and motor platform experiment, the current chopping control is compared with the segmented PWM duty cycle analysis method in this paper. Simulation and experimental results show that the segmented PWM duty cycle analysis method can effectively reduce the current peak and torque ripple, and has high practical application value.

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Section: B Analytical Formula Of Pwm Duty Cycle In the Region θ2<θ<θ3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Analytic Method of Segmented PWM Duty Cycle for Switched Reluctance Motor

Huang

et al. 2023

Trans. Electr. Mach. Syst.

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“…Therefore, in order to overcome this situation, a PWM control algorithm is introduced in this paper, which uses PWM to "smooth" control the average voltage in different conduction intervals and different torque error sampling values. References [19] and [21] also use similar methods to adjust the average voltage across the winding and control the excitation demagnetization time. However, the PWM duty cycle remains unchanged at different speeds, which cannot achieve the optimal effect.…”

Section: Pwm Duty Cycle Control Principlementioning

confidence: 99%

“…Advanced motor topologies were also described in [17]. In [19], Cheng proposed an improved DITC controller combining hysteresis and PWM. By improving the algorithm, using PWM in DITC can reduce the torque error.…”

Section: Introductionmentioning

confidence: 99%

A Three-Interval PWM Duty Cycle Adaptive Method for Torque Ripple Suppression of Switched Reluctance Motor

Huang¹,

Wu²,

Cao³

et al. 2022

PIER M

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Aiming at the problem of excessive torque ripple of switched reluctance motor (SRM), a three-interval PWM duty cycle adaptive control strategy is proposed in this paper. The method changes the PWM duty cycle to adjust the voltage across the windings according to the torque error, divides the interval according to the inductance linear model, and adapts to different PWM duty cycles in different intervals, different speeds, and different torque errors. And the optimal PWM duty cycle group under different rotation speeds is obtained by trial and error, and this duty cycle group is used as the control method to adapt the PWM duty cycle group. Finally, through Matlab/Simulink simulation and motor platform experiments, the three-interval fixed PWM duty cycle control strategy and the three-interval PWM duty cycle adaptive control strategy in this paper are compared. The results show that the three-interval PWM duty cycle adaptive control strategy proposed in this paper has a good torque ripple suppression effect in a wide speed and wide load range.

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“…While the switchoff angle is defined via solving an optimization problem, the objective of this problem is to attain the lowest torque ripples with the highest machine efficiency. In [32], both hysteresis and PWM techniques are involved in performing a modified DITC. With this modification, the torque profile of the SRM is highly improved.…”

Section: Introductionmentioning

confidence: 99%

Research on Novel Hybrid Torque Sharing Function for Switched Reluctance Motors

Al-Amyal

Számel

2022

IEEE Access

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Torque Sharing Function (TSF) approach can be considered a promising method to solve the torque ripple issue in switched reluctance motors (SRMs) drives at low and medium speed ranges. However, at the high-speed operation of the machine, the actual phase current fails to track the reference current profile. This limitation primarily occurs over the demagnetization period of each phase current. Consequently, each phase torque will also fail to track its corresponding reference torque created by the TSF strategy. As a result, of the torque tracking error, a considerable torque ripple will be produced. To address this issue, a novel hybrid TSF is proposed in this research article. The hybrid TSF can adapt during the real-time operation relying on the current (and thus the torque) tracking capability during the magnetization period, which is much higher than during the demagnetization period. At each electrical cycle, the rising part of the incoming phase torque reference is re-profiled to mirror the declining part of the actual torque of the outgoing phases. And therefore, the torque tracking error can be compensated, and a remarkable torque ripple suppression will be attained. Additionally, within the hybrid TSF, an overlap angle controller is also proposed in this work and participated in high-speed operation. The controller keeps monitoring the error between the commanded torque and the actual average torque of the machine, and by adjusting the overlap angle in real-time, the error can be further compensated. Thus, further torque tracking capability is attained. A set of simulation results are presented and favorably compared with other traditional TSF approaches to demonstrate the feasibility and validity of the proposed hybrid TSF.INDEX TERMS Switched reluctance motor, hybrid torque sharing function, indirect instantaneous torque control.

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Modified PWM Direct Instantaneous Torque Control System for SRM

Cited by 9 publications

References 31 publications

An Analytic Method of Segmented PWM Duty Cycle for Switched Reluctance Motor

An Analytic Method of Segmented PWM Duty Cycle for Switched Reluctance Motor

A Three-Interval PWM Duty Cycle Adaptive Method for Torque Ripple Suppression of Switched Reluctance Motor

Research on Novel Hybrid Torque Sharing Function for Switched Reluctance Motors

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