Torque sharing function control of switched reluctance machines with reduced current sensors

Peng, Wei; Gyselinck, Johan; Ahn, Jin Woo; Lee, Dong Hee

doi:10.30941/cestems.2018.00045

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…Table 1 gives the characteristics of some configurations of SRM. One phase in SRM generally requires a set of electronics consisting of two switches and at least one current sensor [13]. Converter price is based on the number of phase.…”

Section: Design Considerationsmentioning

confidence: 99%

“…Miller converter or shared-switch topology was first introduced in [11]. The idea is to share the same switch and diode set between more than one phase and there are many configurations according to the number of phase (even or odd) as shown in [12,13]. The change only affects the upper switch, leaving the lower switches the same as AHB configuration and thus independent phase control is still possible.…”

Section: Miller Converter For the Proposed 8/6 Srmmentioning

confidence: 99%

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Design Considerations and Selection of Cost-Effective Switched Reluctance Drive for Radiator Cooling Fans

et al. 2021

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Switched reluctance motors (SRMs) are simple in structure, easy to manufacture, magnet-less, brushless, and highly robust compared to other AC motors which makes them a good option for applications that operate in harsh environment. However, the motor has non-linear magnetic characteristics, and it comes with various pole-phase combinations and circuit topologies that causes many difficulties in deciding on which type to choose. In this paper, the viability of SRM as a low-cost, rugged machine for vehicle radiator cooling fan is considered. First, necessary design considerations are presented, then three commonly use types of SRM are analyzed: A 3-phase 6/4, 3-phase 12/8, and a 4-phase 8/6 to find their static and dynamic characteristics so the most suitable type can be selected. Simulation results show that the 8/6 SRM produces the highest efficiency with less phase current which reduces the converter burden. However, with asymmetric half bridge converter, eight power switches are required for 8/6 SRM and thus put a burden on the overall drive cost. As a solution, the Miller converter with only six switches for four phase SRM. To verify the proposed idea, the 8/6 SRM was manufactured and tested. The results show that Miller converter can be used for the proposed SRM with slightly reduced efficiency at 80.4%.

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Section: Design Considerationsmentioning

confidence: 99%

Section: Miller Converter For the Proposed 8/6 Srmmentioning

confidence: 99%

Design Considerations and Selection of Cost-Effective Switched Reluctance Drive for Radiator Cooling Fans

et al. 2021

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“…In [10], the authors propose a current model-based prediction to predict the pulse cycle duty cycle of the reference current. In [11], in order to ensure the accuracy of current sampling, two sets of current sensors are selected to track the PWM voltage signal to obtain single-phase current and improve the output performance of torque. In [12], in order to limit the high torque ripple of the motor, a new commutation control strategy is proposed, which defines the position-angle relationship and operation mode of the adjacent rotor, and the operation of the two position angles can be well optimized online by genetic algorithm in the operation of high torque and low torque, so as to suppress the torque ripple of the motor.…”

Section: Introductionmentioning

confidence: 99%

A Torque Ripple Suppression Strategy for Hysteresis Segmented PWM-DITC Permanent Magnet Assisted Switched Reluctance Motor

Huang,

Dai,

et al. 2023

PIER B

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In the traditional Direct Instantaneous Torque Control (DITC) strategy for permanent magnet assisted switched reluctance motors, the hysteresis control mode during the commutation phase and single-phase on-period is not smooth, resulting in excessive synthetic torque ripple. In this paper, we analyzed this problem, combined with the principle of hysteresis segmentation control and pulse width modulation (PWM), and proposed a hysteresis segmented PWM-DITC strategy. By analyzing the torque error changes in each division area of the inductor, the torque error is adjusted by the internal hysteresis loop during the commutation period and single-phase on-period, so that the hysteresis control is smoother, and the torque ripple is reduced. At the same time, the linear model of rotor angle and inductance is established; the PWM voltage modulation calculation formula at both ends of the winding is calculated and derived; the hysteresis output signal at the commutation time and the single-phase on-time is optimized to further suppress the torque ripple. Finally, through simulation and experimental demonstration, the proposed hysteresis loop segmented PWM-DITC strategy can overcome the problem of unsmooth hysteresis control mode and can effectively suppress torque ripple.

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“…Based on flux linkage and torque double hysteresis loop, the flux magnitude and rotation speed of the flux linkage are controlled by selecting the appropriate voltage vector to achieve torque control. Combined with the flux characteristics of SRM, literatures [20]- [23] eliminates the redundant design of the flux linkage closed-loop, and proposes direct instantaneous torque control (DITC), The control algorithm is greatly simplified, but there is a switching frequency uncontrollable problem; To realize accurate distribution of the front-rear phase torque in the commutation interval, torque sharing function (TSF) [24]- [26] selects the appropriate distribution function based on mathematical modeling. Model predictive control (MPC) [27], [28] predicts the future state from the current state according to the state equation, sets the cost function and minimizes it to determine the optimal control signal.…”

Section: Introductionmentioning

confidence: 99%

Research on Novel Direct Instantaneous Torque Control Strategy for Switched Reluctance Motor

Wang

Cui

2020

IEEE Access

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In order to solve the frequent problem of breaking shaft in the starter/generator system of switched reluctance motor, a novel Direct Instantaneous Torque Control (DITC) is proposed to control the torque ripple in this paper. Instead of the hysteresis controller in traditional DITC, the PWM is introduced to modulate the torque deviation; the optimal switching signal is selected according to the PWM modulation signal and the sector where the rotor position is located. Based on the torque characteristic curves, the torque ripple during commutation period is analyzed and the compensation methods are proposed. Simulation results prove that the compensated PWM-DITC can suppress the torque ripple of switched reluctance motor effectively.INDEX TERMS Switched reluctance motor (SRM), direct instantaneous torque control, fixed switching frequency.

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Torque sharing function control of switched reluctance machines with reduced current sensors

Cited by 9 publications

References 9 publications

Design Considerations and Selection of Cost-Effective Switched Reluctance Drive for Radiator Cooling Fans

Design Considerations and Selection of Cost-Effective Switched Reluctance Drive for Radiator Cooling Fans

A Torque Ripple Suppression Strategy for Hysteresis Segmented PWM-DITC Permanent Magnet Assisted Switched Reluctance Motor

Research on Novel Direct Instantaneous Torque Control Strategy for Switched Reluctance Motor

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