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This paper presents a method for reducing computational time in constrained single objective optimization problems related to permanent magnet motors modeled using computationally intensive finite element method. The method is based on differential evolution algorithm. The principal approach is to interrupt the evaluation of inequality constraints after encountering the constraint which is violated...
This research analyzes the vibration phenomenon in certain types of fractional slot permanent magnet synchronous machines that excites low order radial forces. The study utilizes a motor topology from the group having 12-stator slots and 10-rotor poles (12s10p) to identify and propose several design-based solutions to reduce vibration. Some electromagnetic design feature variations in the motor geometry...
Permanent magnet synchronous motor with its high torque density, high efficiency and high reliability, has become the mainstream of the drive system for electric vehicles, elevators, etc. The existing method of fault diagnosis based on the motor model has not considered the fractional characteristics of motor. it is difficult to effectively diagnose minor faults of the current. With the permanent...
Motor drive operation mechanism of High-Voltage Circuit Breaker(HVCB) need permanent magnet synchronous motor(PMSM) with high-dynamic response. Reducing the rotor inertia of PMSM is one technique to realize high dynamic response of the motor. By digging holes in the rotor, the inertia can be reduced. The influence of shape, position and size of inertia-reducing holes on the performance of PMSM is...
Formula SAE is an international engineering design competition for university students to design, build and test a four-wheel race car in one year. Formula student electric series has been introduced into formula student duo to the increasing interest in electric mobility. This paper presents the development of a permanent magnet synchronous motor for a formula student electric race car. A 10 poles/12...
A passivity-based controllers with integral actions is proposed to control the current loop of permanent magnet synchronous motor (PMSM). The Port-controlled Hamiltonian system with dissipation (PCHD) model of permanent magnet synchronous motor with voltage disturbance is established by introduction of the state error and the integral action. The Lyapunov function is constructed to analyze the stability...
There is the high surge current emerging when the asynchronous traction motor is replaced by PMSM with power down-rejoining on. The high back EMF voltage exists when traction PMSM is passing the switching phase insulator. The reason is due to the constant value existence of the permanent magnet. Aiming at above mentioned problems, this paper analyses the reasons of causing transient surge current...
The low-efficiency design method of traditional motor usually needs a long time, so Cloud Computing is introduced for the traditional FEM and BP neural network to reduce the time consuming. In this paper, the electromagnetic axial torque of permanent magnet synchronous motor (PMSM) is used as calculation case. The utilizing Cloud Computing curtails approximately 4 times hour to calculate this case...
This paper proposes a model predictive torque-vector control (MPTVC) scheme for four-switch three-phase inverter (FSTPI)-fed permanent magnet synchronous motor (PMSM). A cost function consist of a new constructed reference torque-vector is designed. Thus, the control of the FSTPI-fed motor drive with the capacitor voltages dc offset suppression can be ensured by only tracking the reference torque-vector...
The stable operation regions are the important issues for direct torque control (DTC) system of permanent magnet synchronous motor (PMSM). The influences of the parameters, such as voltage, current, flux linkage and load angle, on the system operation are investigated through the analysis model presented in this paper. The analysis results show that the parameters must be properly regulated within...
The mathematical models of the permanent magnet synchronous motor (PMSM) are complex systems, characterized by high coupling, nonlinearity, parameter variation and they are highly influenced by disturbances. Conventional PID control method cannot make the system set value tracking and interference suppression both in optimal. In this paper, a two-degree-of-freedom (2DOF) PID controller with a set-valued...
This research analyzes two stator design features as structural solutions to reduce noise and vibration in permanent magnet synchronous machines (PMSM). The study was focused on a surface mounted PMSM with 12-stator slots and 10-rotor poles where vibration is a well-known issue. The structural-harmonic analysis was used to quantify the vibration by analyzing the radial deformation and acceleration...
This paper describes the causes of cogging torque in Permanent Magnet synchronous Motor. Establishes a motor model by ANSOFT software, uses Finite Element Method to quantitative analysis and comparative peak cogging torque and torque with notches at different locations, and different number of auxiliary slot. The conclusion is that notch reasonable can reduce the cogging torque of permanent magnet...
This paper introduces a new topology of multi-stator hybrid excitation permanent magnet synchronous motor with flux weakening capacity. The presented machine features a hybrid magnetic circuit in which the flux generated by PMs are routed into two paths by employing an axial stator. The detailed structure of the presented machine is given in this paper together with the principle of flux weakening...
In this paper, the torque production mechanisms of integral slot distributed, fractional slot concentrated winding (FSCW) and Vernier permanent magnet synchronous machines (PMSMs) are firstly investigated together from the perspective of magnetic gearing effect. The torque contribution and magnetic gearing effect in eight 12-slot PMSMs with different rotor pole numbers are analysed and compared. The...
This paper proposes a method to estimate the stator winding temperature of permanent magnet synchronous motor (PMSM) driven by direct torque control (DTC) strategy, where the stator resistance is used as a direct indicator of the temperature. In this method, the quantitative relationship between the dc current offset and the corresponding changes in torque is derived. The dc current offset is generated...
The traction motor for Electric Vehicle requires space saving, fault tolerant characteristic and high efficiency driving. This research proposes a dual winding multi-phase motor by integrating with SiC-inverter. This paper reveals the proposed permanent magnet synchronous motor achieves the variable characteristics by simulation results and experimental results. The variable characteristics are revealed...
Simulation of a permanent magnet synchronous motor (PMSM) servo system which was based on active disturbance rejection controller (ADRC) was presented in this paper. A new Monte-Carlo method for parameter tuning was invented, which was based on different parameter values and their corresponding dynamic performance. What's more, according to the simulation results of the servo system, the ADRC controller...
In this paper a novel methodology for analysis of electrical machines using finite element method is presented. At the beginning a short presentation of the investigated motor as well as the basic topologies, performance properties and characteristics is presented. Afterwards a brief presentation of the finite element method and its application in design and analysis of electrical machines is introduced...
To broaden the speed range of PMSM (Permanent Magnet Synchronous Motor) for the electric vehicles and to improve the stability in the high speed and small torque operating conditions of the electric vehicles, the control strategy based on flux-weakening control algorithm, using voltage feedback method, combined with SMVSC (Sliding Mode Variable Structure Control) algorithm, using the improved exponential...
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