A new vibration reduction control strategy of switched reluctance machine

Abstract

This paper proposes a control strategy capable of reducing the vibration while keeping a low torque ripple for a switched reluctance machine (SRM). The aim is to minimize the variation of the radial force and to optimize the torque control parameters. At first, the torque ripple reduction method is introduced, for which an off-line optimization of control parameters is adopted. Then, the vibration reduction is achieved by Direct Force Control (DFC), whose purpose is to reduce the variation of the sum of radial forces. However, in order to cope with the drawback of DFC that amplifies the torque ripple, a reference current adapter is proposed based on the limitation of torque and radial force variations. The reference current adapter produces an auto-tuning reference current that achieves a tradeoff between torque ripple and vibration. Finally, simulation results are presented to validate the effectiveness of the proposed control method under different operating points.

Advanced Control of Switched Reluctance Motors (SRMs): A Review on Current Regulation, Torque Control and Vibration Suppression

“…The outer average torque control loop provides the radial force reference and a feed-forward predicted radial force controller is used to regulate the radial force in [192]. A more commonly utilized DIFC implementation is described in Figure 26, which not only avoids the inverse of radial force characteristics but also reduce the switching frequency [193], [194]. Although the mode-0 noise is indeed reduced with the above methods, the torque ripple is inevitably introduced since the radial force and torque characteristics differ a lot.…”

Vibration Reduction Control of Switched Reluctance Machine

“…In part III, since the A-phase force is high near aligned position, the hysteresis (c) allows a limited variation of the force around F ref . The detailed explanations of the DFC are introduced in [28].…”

Damper Winding for Noise and Vibration Reduction of a Permanent Magnet Synchronous Machine

“…The electromagnetic noise is generated by the radial electromagnetic force harmonics in the air gap exciting the stator and the rotor. In order to reduce the electromagnetic noise in electrical machines, many researchers have proposed several methods, which can be classified into two categories: Passive noise reduction methods, which include Slot numbers combination [ 10 , 11 ]; Machine geometry design [ 12 , 13 , 14 ]; Machine PWM strategy [ 15 , 16 , 17 , 18 ]; Passive anti-harmonic filter [ 19 , 20 , 21 ]; and Active noise reduction methods, which include Piezoelectric actuator [ 22 ]; Injection of current harmonics [ 23 , 24 ]; Injection of current harmonics in auxiliary windings [ 25 ]; Active filter topology [ 26 , 27 ]; …”