THE PERFORMANCE ANALYSIS OF HIGH SPEED PERMANENT MAGNET AC SYNCHRONOUS DRIVES USING DIGITAL SIGNAL

PROCESSING *Ram Gopal Sonker HOD, Department of Electronics & Communication Engineering, SHEAT College of Engineering, Varanasi and Assistant Center Controller (ACS) through GBTU Lucknow ( mail- id rgsindiaglobal.zone@gmail.com ) *Jitendra Kumar HOD, Department Elecrical & Electronics Engineering, SHEAT College of Engineering, Varanasi (mail- id kumarjeetu024@gmail.com ) *Anand Gandhi Patel Assistant Professor, Department Electronics & Communication Engineering, SHEAT College of Engineering, Varanasi (mail- id engganand.gandhi@gmail.com ) Abstract This work is improving the speed of Permanent Magnet Synchronous Motor (PMSM) using the Digital Signal Processing (DSP), TMS320LF207. This new family of DSPs enables cost-effective design of intelligent controllers for brushless motors which can fulfill enhanced operations, consisting of less system components, lower system cost and increased performances. The control method presented relies on the field orientated control (F.O.C.). This algorithm maintains efficiency in a wide range of speeds and takes into consideration torque changes with transient phases by controlling the flux directly from the rotor coordinates. In the first part there is account working principle and design of PMSM. Below there is mathematic model of PMSM, which is used in calculation of behavior PMSM. The second part is deal with parameters influence on transient phenomenon, especially his starting and synchronization process. Within this report different enhanced algorithms are presented. Among the solutions proposed are ways to suppress phase current sensors and using a sliding mode observer for speed sensor less control. third case is an IGBTs Inverter with supply cable applied to a PMSM and the last case is Influence of quality of supplied electricity on the behavior of PMSM. Keywords: Permanent Magnet Synchronous Motor (PMSM), Digital Signal Processing (DSP), TMS320LF207, Rectifiers, Gate Drive, Voltage Source Inverter, Sensor and Interfacing card.

1. Introduction The Permanent magnet synchronous motors are increasing applied in several areas such as traction, automobiles, robotics and aerospace technology. The Motor control industry is a strong aggressive sector. For each industry to remain competitive they must not only reduce costs imposed by governments and power plant lobbies but also answers to power consumption reduction and EMI radiation reduction issues. The power density of permanent magnet synchronous motor is higher than one of induction motor with the same ratings due to the no stator power dedicated to the magnetic field production. Nowadays, permanent magnet synchronous motor is designed not only to be more powerful but also with lower mass and lower moment of inertia. This model is the results of these constraining factors are the need of enhanced algorithms. DSP technology allows both a high level of performance as well as system cost reduction. Texas Instruments launches a new DSP, the TMS320LF207, specifically designed for the Digital Motor Control segment. This device combines a 16-bit fixed-point DSP core with microcontroller peripherals in a single chip solution and is part of a new generation of DSPs called the DSP controllers. The Block diagram of PMSM Drive using digital signal processing are given below.

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The PMSM basically a synchronous motor but in place of dc field winding in rotor permanent magnet is replaced. that way the elimination of field copper loss, it possible a) higher power density b) lower rotor inertia c) robust construction of rotor As with most motors, the synchronous motor (SM) has two primary parts.The non-moving is called the stator and the moving, usually inside the stator, is called the rotor. SM can be built in different structures.To enable a motor to rotate two flux are needed, one from the stator and the other one from the rotor. For this process several motor configurations are possible. From the stator side three-phase motors are the most common. There are mainly two ways to generate a rotor flux. One uses rotor windings fed from the stator and the other is made of permanent magnets and generates a constant flux by itself. The use of magnets enables an efficient use of the radial space and replaces the rotor windings, therefore suppressing the rotor copper losses. Advanced magnet materials such as Sm2Co17 or NdFeB permit a considerable reduction in motor dimensions while maintaining a very high power density. In the case of embedded systems where the space occupied is important, a PMSM is usually preferred to an AC synchronous motor with brushes. In high-speed regions a point is reached where the supply voltage is maximum and the rotor field has to be weakened as an invert to the angular speed. In the high-speed region also called the field-weakening region, while a PMS motor needs an angle shift to demagnetize the stator windings, the SM with rotor windings maintains maximum efficiency by regulating the rotor currents and then the flux. For high-speed systems where high efficiency is required, AC synchronous motors with rotor windings may be a good compromise.the figure are as.

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eferences

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ntrolled SPWM

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