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This paper proposes an end-effect equivalent 2D model to analyze back-EMF of high speed permanent magnet synchronous motor(PMSM) in order to consider a leakage flux in the end region of stator and air-gap. Since 2D FEA does not provide a precise analyzing result of back-EMF calculation due to the long airgap, an equivalent back-EMF simulation method is proposed. The proposed model of back-EMF analysis...
This paper proposes a novel integrated control system including PMSM drive and vehicle-to-grid (V2G) technology based on open winding PMSM. It realizes motor drive mode and bidirectional energy flow for Electric Vehicles in V2G control mode. These modes can be switched easily and smoothly according to commands from integrated controller. Compared with the traditional EVs control system which controls...
This paper proposes a sensorless field-oriented control(FOC) strategy for Surface-mount Permanent Magnet Synchronous Motor(SPMSM). Firstly, a rotor flux estimation method with a high pass filter is introduced. Secondly, the basic principle of PLL and PI parameters tuning method derivation are demonstrated. And then, the compensation method for the phase shift caused by the high pass filter has been...
The follow-up control system has the feature of input signal random changing. On the basis of motor driving technology, the system can follow the change of the input signal. Permanent Magnet Synchronous Motor (PMSM) has small output torque ripple feature. Thus it has broad application prospect in the follow-up control system. The vector control of PMSM has coupling feature, reducing the speed dynamic...
In this paper, an optimal switching table for PMSM DTC system using zero voltage vector is proposed. Zero voltage vector decreases stator flux and torque very slowly, so it can be used to suppress torque ripple when the system is at steady-state. And when the system is at dynamic-state, non-zero voltage is used to get quicker response. As both 111 and 000 can be used to generate zero voltage vector,...
Safe and reliable of inverter is directly related to the normal operation of permanent magnet synchronous motor drive system. Therefore, in the paper, taking a 12.5kW Permanent Magnet Synchronous Motor (PMSM) as the research object, two-dimensional transient electromagnetic field calculation model based on vector control strategy is established, and the corresponding assumptions and boundary conditions...
To investigate the influence of sectionalized stators on shaft voltage in integer slot permanent magnetic synchronous machine (PMSM), an aid of magnet circuit and analytical method is proposed to deduce the shaft voltage, whilst segment and pole number combinations are further discussed. Finite element method (FEM) is used to verify the accuracy of above qualitative analysis. The influence of various...
To enhance the control precision of permanent magnet synchronous motor (PMSM) under parameter variations and load torque disturbances, a minimal reduced-order load torque observer (MRLTO) based discrete-time sliding mode control (DSMC) scheme is presented. First, a DSMC controller is presented on the basis of the second-order discrete-time PMSM dynamics model to enhance the speed tracking response...
Due to the space size of the vehicle itself and vehicle energy capacity constraints, hybrid electric vehicles (HEV) usually use high power density and high efficiency permanent magnet synchronous motor (PMSM) as the integrated starter/generator (ISG) motor of drive system, but the temperature rise caused by the losses in the process of running will lead to some problems. It is necessary to obtain...
This paper proposes a novel technique to estimate online the inductances of a Permanent Magnet Synchronous Machine (PMSM) based on the measurement of the current derivatives excited by two active-voltage vectors and one zero-voltage vector within a PWM cycle. The d- and q-axes inductances of PMSMs are calculated during normal operation of the drive system. The influence of the magnetic saturation...
The topology of neutral-point clamped (NPC) is widely used for multilevel inverters, and the balance of the neutral-point voltage is one of the key technologies which determines the performance of Permanent Magnet Synchronous Motor(PMSM). Repetitive control can ensure control precisions by keeping the appropriateness of the control signal when the system is stable. In this paper, neutral-point balancing...
The eddy current loss (ECL) impacts the stability of high speed permanent magnet synchronous motor (HSPMSM), the high efficiency and temperature of it. This paper analyzes the ECL in rotor by calculation method and separates it by experiment. In all kinds of losses, core loss and coil loss can be separated by traditional calculation method with related parameters being tested actually. Besides, Windage...
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