Phase‐current waveform for switched reluctance motors to eliminate input‐current ripple and torque ripple in low‐power propulsion below magnetic saturation

Kusumi, Takayuki; Hara, Takuto; Umetani, Kazuhiro; Hiraki, Eiji

doi:10.1049/iet-pel.2019.1207

Cited by 12 publications

(6 citation statements)

References 28 publications

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“…Nevertheless, this may make the model sophisticated and produce heavy burden of the processor. In Reference [19], phase-current waveform for switched reluctance motors is analyzed, which is applied to mitigate input-current ripple and torque ripple in low-power propulsion below magnetic saturation.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Modified PWM Direct Instantaneous Torque Control System for SRM

Cheng

2021

Mathematical Problems in Engineering

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Torque ripple is a defect of switched reluctant motors. DITC (direct instantaneous torque control) is harnessed to solve the problem as a traditional method, which is superior to TSF (torque sharing function). In this paper, a new controller is proposed with modified hysteresis and PWM in DITC. With the modified algorithm, the torque error will be reduced with PWM in DITC. The proposed algorithm is effective to improve sample and 0 status in a period. The modified algorithm is based on application of zero in the asymmetric half bridge, which is implemented as the buffer zone. In case of big torque error, hysteresis will mitigate error under the characteristic of fast responding. In case of small errors, the modified PWM will solve torque error in the equivalent strategy, which has adopted the essence of the impulse equivalent method. The modified controller is designed to reduce responding time and minimize the torque ripple under the proposed algorithm, which has been designed to harness different functions in different torque errors. Based on final simulation and experimental results, responding speed and reduction of output torque ripple are enhanced effectively.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Modified PWM Direct Instantaneous Torque Control System for SRM

Cheng

2021

Mathematical Problems in Engineering

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“…The use of a torque sharing function to minimize the torque ripple requires an adjustment of the phase currents in a way that maintains the required shape of the torques generated by each phase [14,16,17]. Figure 2 shows examples of the waveforms of phase currents, phase torque sharing functions (with cosine slopes) [15], and derivatives of torque sharing functions, with an indication of the individual phases: outgoing (k − 1), current (k) and incoming (k + 1).…”

Section: Classical Torque Current Controlmentioning

confidence: 99%

“…Torque ripples can be minimized structurally by increasing the number of phases and poles of the machine and optimizing the shape or span of its poles [11][12][13][14]. Algorithmic methods are a second group of methods used for reducing torque ripple.…”

Section: Introductionmentioning

confidence: 99%

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Analysis Performance of SRM Based on the Novel Dependent Torque Control Method

et al. 2021

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This paper presents a description and the results of simulations and laboratory tests of proposed methods for dependent torque control in a Switched Reluctance Motor (SRM). The proposed methods are based on Dependent Torque Motor Control (Rising Slope), DTMC(RC), and Dependent Torque Motor Control (Falling Slope), DTMC(FC). The results of these studies were compared with those on the Classical Torque Motor Control (CTMC) method. Studies were conducted for each of the analyzed control methods by determining the efficiency of the drive and the RMS of the source current and analyzing the vibrations generated for each of the control methods. The harmonics of the phase currents, which caused an increase in the level of vibrations generated, were determined. The usefulness of the proposed methods for controlling SRMs was assessed based on simulations and experiments. Additionally, the natural frequencies of the stator of the tested SRM were determined by a simulation using the Ansys Maxwell suite. The levels of vibration acceleration generated by the SRM were compared for the considered control methods.

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“…For example, in literature [5], a fuzzy control algorithm is proposed to find the optimal combination of switching angles at different speeds, so as to suppress the torque ripple of SRM motor. Literature [6] proposes to use a new phase current waveform instead of the traditional square wave current to drive SRM motor, so as to solve the torque ripple problem caused by the commutation stage, and ultimately reduce the total torque ripple. Literature [7] proposed a method to reduce the torque pulsation and improve the average torque of SRM motor based on multistage ant colony optimization algorithm (MSCA).…”

Section: Introduction *mentioning

confidence: 99%

Suppression of Torque Ripple in Switched Reluctance Motors Which is Based on Synchronization Technology

Li,

Wei,

Zhang

et al. 2024

EAI Endorsed Trans Energy Web

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The double salient pole structure of Switched Reluctance Motor (SRM) makes its electromagnetic field exist nonlinear saturation characteristics, resulting in its large torque pulsation in operation, so it is difficult to achieve speed regulation smoothly by traditional control methods. In view of this problem, a sliding mode control strategy which is based on synchronous transmission technology was proposed.Firstly, the basic structure of switched reluctance motor was analyzed, and the mathematical model of mechanical motion of switched reluctance motor was established. Secondly, an improved sliding mode controller which is based on synchronous signal transmission technology was designed by analyzing the reason of large torque ripple of switched reluctance motor, and the stability of the system was proved. Finally, simulation is used to verify the effectiveness of the control strategy.Compared with the traditional PID (Proportional Integral Differential) control algorithm, this control technology not only suppresses the SRM torque ripple effectively , but also makes the sliding mode controller output the precise target electromagnetic torque quickly by increasing the control variables. The results of research indicate that this design can not only restrain the torque ripple effectively, but also adjust the convergence speed and overshoot of the controller by adjusting the design parameters.

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Phase‐current waveform for switched reluctance motors to eliminate input‐current ripple and torque ripple in low‐power propulsion below magnetic saturation

Cited by 12 publications

References 28 publications

Modified PWM Direct Instantaneous Torque Control System for SRM

Modified PWM Direct Instantaneous Torque Control System for SRM

Analysis Performance of SRM Based on the Novel Dependent Torque Control Method

Suppression of Torque Ripple in Switched Reluctance Motors Which is Based on Synchronization Technology

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