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Multiple-motor drive system is usually adopted in electric vehicles, high speed rail and some industry applications, such as textile, steel and paper making. In order to save cost and simplify structure, a dual permanent magnet synchronous motors (D-PMSMs) drive system fed by a five-leg inverter is investigated in this paper. Based on the space vector pulse width modulation (SVPWM) method, unity power...
This paper presents a comparative study of constant power speed range of permanent magnet brushless (PMBL) machines with different d-axis inductance for electric vehicles (EVs). According to the flux weakening principle, three typical operation cases, namely, characteristic current is higher, lower than and equals current limitation, are given and analyzed in details. By the finite element analysis...
In this paper, an equivalent variable permeance-networks (EVPN) method for analyzing the out-rotor double-salient permanent-magnet in-wheel (OR-DSPMIW) motor is proposed due to the inaccuracy of conventional magnet circuit method and the time-consuming feature of finite-element analysis (FEA). Firstly, the EVPN method is established, which includes the permeance-networks configuration, the permeance...
Flux switching permanent magnet (FSPM) motor is becoming attractive due to its advantages of high torque density, high efficiency and robust rotor. However, since the permanent magnet (PM) and armature windings of the FSPM motor are both located on the stator, the heat sources are relatively concentrated. Thus, more attentions have to be paid to the heat dissipation. In this paper, the losses of a...
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