Two-Segment Three-Phase PMSM Drive With Carrier Phase-Shift PWM for Torque Ripple and Vibration Reduction

Characteristic Analysis and Predictive Torque Control of the Modular Three-Phase PMSM for Low-Voltage High Power Application

“…The main unit motor parameters are given in Table 1, featured by a single-layer winding with the segregated coils. The Ansys/Maxwell package software was As stated in [12][13][14][15][16][17][18][19][20][21], if the three-phase winding of the motor unit does not share any slot with the other motor units, the mutual inductances among the three motor units can be negligible, realizing independent control of each winding set and dramatically reducing the difficulty of controller design. The neutral points of different three-phase winding sets are isolated from each other.…”

“…Thus, the proposed machine can be modeled as multiple segregated three-phase PMSMs, reducing the mathematical model complexity. Thus, the d-q axis model of the proposed machine in the synchronous rotor reference frame can be expressed by the traditional three-phase PMSM [14,20,21]. In this case, the d-q axis voltage transformation of each three-phase winding set can be expressed as…”

“…To facilitate the implementation of the control algorithm of the multi-three-phase PMSM, the modular three-phase PMSM with a novel and untraditional stator winding arrangement has attracted the attention of scholars [12][13][14][15][16][17][18][19][20][21]. The merit of the stator winding placement is that the mutual couplings among the multi-three-phase winding sets are negligible.…”

“…In [19], a general modeling method for a triple three-phase permanent magnet assisted synchronous reluctance machine with segregated winding sets was proposed, offering excellent flexibility for fault monitoring performance evaluation, fault detection, and post fault control. In [20], a multi-segment PMSM drive system with phase-shift pulse width modulation (PWM)was presented, which can meet the requirements of lower torque ripple, vibration, and noise. Furthermore, the circulating current between the two VSIs can be avoided with this winding configuration.…”

“…In [21], a dual three-phase PMSM topology fed by two Ttype neutral point clamped inverters was proposed for low-voltage and high-power applications, realizing the decoupling of PWM control and dc-link capacitor voltage balance control. In [12][13][14][15][16][17][18][19][20][21], the asymmetrical mutual inductances of each motor unit caused by the segregated winding configuration are not considered when the mathematical model of modular three-phase PMSM is established, which can dramatically affect the static and dynamic characteristics. In addition, the modular three-phase PMSM in the actual operation process is a nonlinear system with parameter variation and uncertain disturbance.…”