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

Wang, Shuanghong; Hu, Zihui; Cui, Xianjin

doi:10.1109/access.2020.2986393

Cited by 51 publications

(28 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Hysteresis is key to higher performance, which is set under constant experimentation and experience. In Reference [22], for the sake of the hysteresis controller in traditional DITC, the PWM is introduced to modulate the torque deviation. However, there is no comprehensive consideration of the characteristics of the two methods, and integrate them together.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Modified PWM Direct Instantaneous Torque Control System for SRM

Cheng

2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

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.

show abstract

Section: Theoretical Backgroundmentioning

confidence: 99%

Modified PWM Direct Instantaneous Torque Control System for SRM

Cheng

2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…e method can output a specific reference torque by setting the switching angle reasonably and adjusting the torque change rate, so as to achieve smooth commutation and effectively reduce the torque fluctuation [19,20,22]. e TSF includes linear, sine, cosine, cubic, and exponential types.…”

Section: Design Of Torque Control Systemmentioning

confidence: 99%

“…However, this method requires complex mathematical model calculations and has large fluctuation of levitation force and torque. At present, there is a hot topic of research in applying the control methods from SRM to BSRM [15][16][17][18][19][20]. e DTC (direct torque control) and DFC can better suppress torque and levitation force ripples by setting the space voltage vector table reasonably well.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Control System Design for 16/6/8 Double-Stator Bearingless Switched Reluctance Motor

Sun

Yang

Han

et al. 2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The 16/6/8 double-stator bearingless switched reluctance motor (DSBSRM) is used as the object of study in this paper. To solve the problem of torque and levitation force ripples in this motor, a control system direct force control (DFC) and direct instantaneous torque control (DITC) based on the torque sharing function (TSF) are proposed. With the strong nonlinearity and approximation capability of radial basis function neural networks, the torque and levitation force observer are designed. The observed torque and levitation forces are used as feedback for the internal loop control, which is combined with the external loop control to make a double closed-loop control. In order to further improve the output torque and system robustness and suppress the torque ripple in steady-state process, the motor winding method is optimized and a set of switching angles is added on the basis of TSF. The simulation results verify the effectiveness and superiority of the proposed control method. It effectively suppresses speed ripple and reduces torque and levitation force fluctuations and rotor radial displacement jitter.

show abstract

“…The addition of a semi-oval auxiliary core on both sides of rotor tooth alleviates the torque ripple [16]. In active method, the shaping of phase currents through switching control is employed to reduce the torque ripple [17,18]. The increase in phase number also lessens the torque ripple in SRMs.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Method Based Design and Analysis of a Low Torque Ripple Double-Stator Switched Reluctance Motor

Gupta¹,

Chaudhary²

2021

PIER C

View full text Add to dashboard Cite

Double-stator switched reluctance motors (DSSRMs) acquire attention because of their high torque/power generating capability compared to conventional and segmented rotor switched reluctance motors. One of the main limiting performance indices of such motors for industrial applications is its high torque ripple. This paper proposes a 12/10/12 pole DSSRM with an angular shift of half of the stroke angle between inner and outer stators. The respective phase windings of the inner and outer stators are parallelly excited with the same phase angle shift to reduce the torque ripple. Each rotor segment is constructed with a pair of half rotor segments that are isolated from each other through the insertion of a non-magnetic isolator between them. Firstly, the design hypothesis for a low torque ripple DSSRM has been presented; thereafter, some geometric modifications have been suggested and investigated to obtain a nearby response in the proposed DSSRM. The calculation of the width of the non-magnetic isolator, modification in the pole height of outer stator and modification in the arc angles of rotor segments/stator poles are discussed in detail. The effectiveness of the proposed motor is investigated through a 2D finite-element modelling and simulation in ANSYS/MAXWELL software. Simulation results show that the torque ripple is significantly reduced by 74.9% in the proposed DSSRM compared to the baseline DSSRM.

show abstract

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

Cited by 51 publications

References 30 publications

Modified PWM Direct Instantaneous Torque Control System for SRM

Modified PWM Direct Instantaneous Torque Control System for SRM

Control System Design for 16/6/8 Double-Stator Bearingless Switched Reluctance Motor

Finite Element Method Based Design and Analysis of a Low Torque Ripple Double-Stator Switched Reluctance Motor

Contact Info

Product

Resources

About