Speed Control Of Se.d. C Motor Using Imc

TM4, the industrial partner, is a leading manufacturer and supplier of traction motors and drives for electric vehicle industry in Canada. As a drive manufacturer, they always aim to provide solution which is energy efficient with small footprint. In order to achieve this, they always look for alternative software and hardware solutions. Software modifications, which may improve the system performance in comparison to their existing drive control strategy without increasing the size of the system, are always sought after for continuous improvement of their system. In this regards, the internship is relevant to them for exploring alternative control strategies.

Using Field Oriented Control, current control is largely unaffected by speed of rotation of the motor[6].In the scheme of filed oriented control motor currents and voltages obtained from the motor are transformed into d-q reference frame. Measured currents from three stator phases these currents which are now in the stator reference frame are converted into two phase using Clarke transformations which are further converted into the corresponding rotor reference frame using Park transformation. The resultant current obtained is dc which is easier for the PI controllers to operate.

A dc Brushless Motor uses a permanent magnet external rotor, three phases of driving coils, one or more Hall Effect devices to sense the position of the rotor, and the associated drive electronics. The coils are activated, one phase after the other, by the drive electronics as cued by the signals from the Hall effect sensors, they act as three phase synchronous motors containing their own variable frequency drive electronics. A simplified current controlled modulation technique for BLDC motors is presented.

D.C Motor is used for variable speed operation because in dc motor torque and flux that can be control independently and that is achieved by armature and field current control respectively. D.C motor has many advantages delivering high starting torque, ease of control and non linear performance. But due to certain disadvantage of dc machine such as mechanical commutator and brush holder required time to time maintenance [1] .So cost of the drive system is increases. But now D.C Motor is less used in industrial applications. Because of low cost, better performance and the requirement of maintenance is less as compared to D.C Motor it make the asynchronous motor advantageous in many industrial applications. SCIM are most widely used than all the rest of the electric motor as they have all the advantages of A.C Motors and are cheaper in cost as compared to slip ring induction motor. Because of absence of slip rings, brush maintenance duration and cost associated with the wear and tear of brush are minimized. Because of these advantages, the induction motor is used in element of most of the electrical drive system for all the conditions like starting, braking, change in speed and speed reversal. To achieve the maximum efficiency of the induction motor drive, so many techniques are developed in the last few years. Now a day’s high switching frequency converters are used for changing the frequency, phase and amplitude of the input to an A.C. Motor can be changed, hence the speed and motor torque can be controlled. With the help of power electronic it is possible to

In this chapter, an overview of the state of the art system of an induction motor is carried out. It looks at various induction motor control methodologies utilizing current and voltage control to control the flux and the torque of the dynamic system. Highlight of the current and future challenges of induction motor drives are presented. To do that, a general principle of induction motor drives is discussed first follow by phase controlled of induction motor drives, frequency controlled of induction motor, and vector controlled of induction motor.

PID controllers, also known as a proportional integral device controller, are one of the most commonly used controllers in industry. A PID algorithm is derived from three coefficients. These tuning parameters are the proportional, integral and derivative coefficients, which are adjusted per device to obtain an optimal response.

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is the rotor resistor value and when the slip stays a very small value, then the s is also very small so it can be treat as a 0 value. is rotor induced EMF and it is in direct proportion to the voltage. Torque is in direct proportion to the s. Therefore, we know that torque T is also in direct proportion to . When we increase(decrease)the voltage supply, the torque will increase(decrease), therefore the speed increase(decrease). By changing the voltage supply we can achieve the speed control, this is the simplest way to control the speed. But not widely use in the real industry. Because: change a very large voltage but the speed only changes a little, the speed control range is too small. When the supply voltage has a sudden changing, the flux density in the motor, a sudden changing flus density will result a change in magnetic conditions of the motor. This result is not welcomed in the real condition of use. So changing the supply voltage is rarely used.[5][6]

A variable speed pump is operated by a circuit consisting of a rectifier that converts alternating current (AC) to direct current (DC), and another circuit known as inverter circuit to transform the DC into a different version of the AC. Then, the AC produced by the inverter controls the speed of an electric motor. This is the operation of the variable frequency drive (VFD) which is also known as variable speed drive (VSD). By controlling the speed of the centrifugal pump

ABSTRACT: In order to optimize the speed-control performance of the permanent-magnet synchronous motor (PMSM) system with different disturbances and uncertainties,. In further improve the disturbance rejection performance of SMC method, extended sliding-mode disturbance observer (ESMDO) is proposed, and the estimated system disturbance is considered as the feed forward compensation part to compensate sliding-mode speed controller. Thus, a composite control method combining an SMC part and a feed forward compensation part based on ESMDO, called SMC+ESMDO method, is developed. First, a sliding-mode control method based on one novel sliding-mode

During this period I was made aware about the fundamentals and components involved in the field of automation, from manual switches to sophisticated sensors, along with their operating principles, powering circuits and application based installation. Training was also provided on the operation of Programmable Logic Controllers (PLCs) in order to control each of the various components involved in a process with a purpose to remotely control, troubleshoot and manipulate that process in accordance with the need of the industry, all with the help of a computer device. It also comprised of the basics about Variable Frequency Drives (VFDs) and their applications in speed and rotational direction control of motors.

The aim of this project is to do simulation and hardware implementation of Impedance inverter and controlling speed of three phase induction motor. In Impedance inverter one control circuit which has elements like L & C which is known as impedance network in which L is connected in series & C is connected in parallel. By creating short through fault in this network, we can get voltage Buck or Boost. This is the main advantage of impedance inverter.

The controller for the SSSC can be isolated, generally, into two main controllers, namely internal and external controllers. The main function of the internal controller is to give the control signal to drive the gate pattern generator of the power converter keeping in mind to generate a fundamental output voltage waveform with the desired magnitude and phase angle in synchronism with the ac power system. The function of the external controller, if exists, is to alter the reference signals which decides the practical operation of the SSSC so as to accomplish the desired system performance. The block diagram of the SSSC controller is represented in Figure 3.13.

RC2 is open to ensure that the forward coil cannot be activated when the motor is running in the reverse direction. RC1 is closed to ensure that the motor keeps running even when the start button return to its normal position.

PID controllers are the most widely-used type of controller for industrial applications. They are structurally simple and exhibit robust performance over a wide range of operating conditions. In the absence of the complete knowledge of the process these types of controllers are the most efficient of choices.