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Generally, because of the temperature rise, the ageing, the saturation, etc. the resistance value and inductance value of the machine windings and the magnetic flux will be changed. The control performance of the permanent magnetic synchronous motors (PMSM) can be influenced by the plant parameter variation and external disturbance. This paper presents a robust H∞ control for PMSM drivers. Firstly,...
The objective of this paper is to give an insight about the methodology of developing the algorithm for a DSP controlled motor drive in order to reduce complexity and development time by using re-useable software modules from TI?? library, and by constructing the flow block diagram within the incremental system build (ISB) levels logic frame. The proposed methodology is applied for the implementation...
As a novel electrical variable transmission (EVT) in hybrid electric vehicles (HEV), the dual mechanical port electric machine (DMPM) has been being researched and developed recently. In this paper, a control and drive system for permanent magnetic DMPM (PM-DMPM), consisting of the inverter unit and the control unit, is designed and developed. The inverter unit adopts a back-to-back inverter topology...
In this paper, a new composite control strategy is proposed for permanent magnet synchronous motor (PMSM) drives to achieve fast dynamic response and minimum steady state error. Based on the prior given the scope of the deviation, it implemented the automatical switch between fuzzy control and the PI control, and designed the control system model of permanent magnet synchronous motor. It established...
This paper discusses application of nonlinear decoupling algorithm for a permanent magnet synchronous motors with adaptive control, capable of combining the input-output linearization technique and Lyapunov stability theory. Based on the Lyapunov stability theory, the adaptation law of the proposed controller is derived along with the verification of the overall system's stability. Computer simulation...
To solve the problems of torque ripple and in constant switch frequency of inverter in the conventional direct torque control (DTC), a novel DTC method using space vector pulse width modulation (SVM) is proposed based on analysis of permanent magnet synchronous motor (PMSM) mathematical model, where hysteresis controller is substituted by PI controller and switch table is substituted by SVM. In order...
The performance of a speed sensorless variable structure direct torque controlled interior permanent magnet synchronous motor drive is investigated in this paper. The speed is estimated using position information extracted using high frequency signal injection at low speeds and a sliding observer at high speeds. The changeover between these two algorithms is performed using a weighting function which...
In this paper the theory of direct torque control (DTC) in permanent magnet synchronous motor (PMSM) is investigated. The effect of zero voltage vectors on the performances of the PMSM DTC drives is analyzed. Different from the conventional switching table eliminating zero voltage vectors, a novel switching table using zero voltage vectors is proposed. Simulation results show that the PMSM DTC drives...
The paper deals with the problem of robust speed control of electrical servodrives. A robust controller is developed using a nonlinear IP controller. The controller nonlinear characteristic is obtained due to fuzzy logic technique application. An original method of controller settings adjustment is presented. The use of this adjustment procedure ensures robust speed control against the variations...
In this paper, a PWM inverter-fed Interior Permanent Magnet Synchronous Motor (IPMSM) Drive System for Hybrid Vehicle is modeled considering battery with two quadrant chopper in order to step up a voltage of the battery. Using the step-up chopper, a capacity of the battery can become smaller, and regenerate power under braking. The drive system is controlled by Maximum Torque/Ampere Control strategy...
Cost and reliability reasons lead to motion sensorless control of high speed PMSM drives. This paper introduces a novel emf based observer for rotor position and speed estimation that provides very fast starting from pre-produced zero initial position (less than 100 milliseconds from zero to 10 krpm in a 750 W surface PMSM) with very good dynamics response to large step torque perturbations. Implementations...
To solve the problems of torque ripple and inconstant switch frequency of inverter in the conventional direct torque control (DTC) for permanent magnet synchronous motor (PMSM) drive, a novel DTC method using space vector pulse width modulation (SVM) is proposed based on analysis of PMSM mathematical model. In this novel DTC system of PMSM , traditional torque hysteresis controller and flux hysteresis...
The performance of a speed sensorless variable structure direct torque controlled interior permanent magnet synchronous motor drive at very low speeds including standstill is investigated in this paper. The rotor position and speed are estimated using a high frequency signal injection algorithm at low speeds and a sliding observer at medium to high speeds. The changeover between these two algorithms...
Generally, PWM voltage source inverter (VSI) has been used for the variable speed permanent magnet synchronous motor (PMSM) drives. However, the PWM-VSI fed PMSMs has two disadvantages. Firstly, PMSMs cannot operate at the speed at which the motor terminal voltage exceeds voltage constraint imposed by the DC-link voltage. Secondly, the distortion of the voltage commands increase at the low speed,...
This paper deals with the problem of robust speed control of electrical servodrives. A robust controller is developed using a nonlinear PI controller. The controller nonlinear characteristics is obtained due to fuzzy logic technique application. An original method of controller settings adjustment is presented. The use of this adjustment procedure ensures robust speed control against the variations...
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