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MATHEMATICAL MODELING AND SIMULATION OF PERMANENT MAGNET SYNCHRONOUS MOTOR

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مارس 23, 2017

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MATHEMATICAL MODELING AND SIMULATION OF PERMANENT MAGNET SYNCHRONOUS MOTOR

مدل سازی و شبیه سازی درایو موتور القایی با کنترل فضای برداری

نام مقاله به فارسی:

MATHEMATICAL MODELING AND SIMULATION OF PERMANENT MAGNET SYNCHRONOUS MOTOR

نام مقاله به انگلیسی:

مدل سازی و شبیه سازی درایو موتور القایی با کنترل فضای برداری

Abstract:

Multilevel voltage-fed inverters with space vector pulse width modulation strategy are gained importance in high power high performance industrial drive applications. A number of Pulse Width Modulation (PWM) schemes are used to obtain variable voltage and frequency supply from an inverter. There is an increasing trend of using space vector PWM (SVPWM) because of their easier digital realization and better dc bus utilization. This paper proposes a new simplified space vector PWM method for a three-level inverter fed induction motor drive. Firstly model of a three-phase VSI is discussed based on space vector representation. Next a simple and flexible simulation model of SVPWM is developed using MATLAB/SIMULINK. Simulation results verify the effectiveness of the proposed approach.
Key words: Power Induction motor drive, Space vector, PWM, Voltage source inverter

INTRODUCTION:
The voltage source inverters (VSI) fed variable speed AC drives have gained more importance in many industrial applications. To get variable voltage, variable frequency supplies from a VSI, the PWM algorithms are becoming more popular due to their advantages. A detailed survey of various PWM algorithms is given in (Holtz, 1992). Three-level voltage-fed PWM inverters are recently showing popularity for multi-megawatt industrial drive applications (Mondal et al, 2003). In recent years, the space vector PWM (SVPWM) algorithm is attracting many researchers. The Space Vector Pulse Width Modulation (SVPWM) method is an advanced, computation-intensive PWM method and possibly the best among all the PWM techniques for variable frequency drive application (Iqbal, 2008), (Mondal et al, 2003). This technique results in higher magnitude of fundamental output voltage available as compared to sinusoidal PWM. However, SVPWM algorithm used in three-level inverters is more complex because of large number of inverter switching states. Space vector approach has the advantages of lower current harmonics and a possible higher modulation index compared with the three phase sinusoidal modulation method and ease of digital implementation (Willi et al, 1988). The SVPWM method considers interaction of the phase and optimizes the harmonic content of the three phase isolated neutral load as shown in Fig. 1.