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Interior permanent magnet-synchronous machines (IPMSM) feature many favourable properties for e-mobility application as high power density and good efficiency. However, they require careful modelling because of strong anisotropies of the rotor, as they are also known from salient-pole synchronous machines. These anisotropies are often accounted for by different values for the d-axis and q-axis inductances...
For induction motor rotating near the synchronous speed, re-switching of power supply could be realized by rapid soft re-switching technology which could eliminate or reduce the inrush current and torque. The intelligent hybrid switches(IHS) based on SCRs is used to implement the control strategy of rapid soft re-switching with series of firing angles. Aiming at the alternating state of soft re-switching...
This paper presents the effect of magnetization of the permanent magnet on torque pulsation and performances of the permanent magnet brushless DC (PM BLDC) motor. Three common types of PM magnetization field patterns, radial, parallel and sinusoidal magnetization, are applied to the electromagnetic field system and investigated the motor performances and output torque profiles. The testing and simulation...
The opposite-rotation dual mechanical ports (ODMP) PMSM is a novel machine applied to special situation, its electrical-magnetic relationship is different from traditional PMSM, so research on analysis method and design theory is necessary, especially for influence of main parameters on machine performance. The structure and operation principle are discussed. Its mathematic model adopted by dual d-q...
After introduced several common hybrid systems, the article gives out a new hybrid system typology which uses a dual rotor machine as an electrical variable transmission. The article briefly introduces the basic working principles of the machine, then analysis the mathematical model of a novel machine in the outer rotor synchronous reference frame, it gives out the equivalent circuit as well. According...
In this paper, we are going to introduce a new kind of electrical variable transmission (EVT), which is called brushless doubly-fed electrical variable transmission (BL-DF-EVT). The structures of the BL-DF-EVT are given in detail. And the operational principles in different conditions are discussed. We also established the mathematic model, and the simulation by using Matlab will prove the feasibility...
In this paper, two emerging outer-rotor stator-permanent-magnet (PM) brushless motor drives, namely the doubly-salient PM motor drive and the PM hybrid brushless motor drive, are firstly quantitatively compared, which are particularly attractive for serving as in-wheel motor drives for electric vehicles. In order to enable a fair comparison, these two motor drives are designed with the same peripheral...
Permanent magnet brushless motor (PMBM) is widely used in driving system of electric vehicle because of its high power density, wide speed regulating range and high efficiency. 120deg square current for PMBM is simple in control method, but complex in simulation. A kind of simple and useful simulation module for PMBM is the key point for analyzing the torque ripple and upgrading its performance. This...
Compared with their three-phase counterparts, multiphase machines with phase number n ges 5 have many advantages like lower torque pulsation, higher power density, better fault tolerance, etc. Due to these advantages and the increasing demands on high performance and high power adjustable speed drives, the research on multiphase drives has experienced a significant growth since the end of last century...
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