Speed control of separately excited dc motor by ppt 2. Dc motors designed for your application dc motor applications tecowestinghouse motor company dc motors are ideally suited to a multitude of industrial and marine applications in which high torque and variable speed are required. Speed control can be achieved by variable battery tappings, variable supply voltage, resistors or electronic controls. Field weakening control of a separately excited dc motor. One of the most important features of the dc motor is. It is one of the most popular converter circuits and is widely used in the speed control of separately excited dc machines. Basically, the rotational speed of a dc motor is corresponding to the emf in its coil the voltage applied to it minus voltage lost on its resistance, and the torque is corresponding to the current. In this report, we have implemented a dc motor speed.
Controlling speed of dc motor with fuzzy controller in. This paper describes speed control of separately excited dc motor using chopper as power converter and pi as speed and current controller. In this paper, we have done speed control for rated and below rated speed. This variable voltage is supplied by a motor generator set which consists of either a dc or an ac motor m2. A antiwindup technique is used in controller to avoid integrator windup problem. Close loop control is done in two loop, first inner current loop having currenttorque controller and.
The objective of this paper is to describe the principle of dc motor speed control using. Speed control of separately excited dc motor using chopper irjet. M1 is the main motor whose speed control is required. Traditionally rheostat armature control method was used for low power dc motors. A common actuator in control systems is the dc motor. Abstract the thesis describes about the concept of dc motor and speed control separately excited dc motor.
It is one of the most popular converter circuits and is widely. Pdf speed control of separately excited dc motor zacarias. A statespace controller for dc motor position control. These values were derived by experiment from an actual motor in carnegie mellons. This paper proposes two methods of speed controlling for separately excited dc motor. Feb 16, 2014 depending upon the type of connections to the field winding for excitation, the dc motors can be classified into two categories. By applying a variable voltage across its armature, any desired speed can be obtained. In the constant power region, field flux should be reduced to achieve speed above the.
The controller is designed based on the expert knowledge of the system. In armature control, speed controller has been used in outer loop. Simple simulation of separately excited dc motor duration. We can control the speed of a dc motor using pid controller in two different methods. The flexible control of dc motor has been donated in the extensive use of dc motor in the era of industry, as the increasing usage of semiconductor power converter units. Sir i want to control the speed of 220v dc shunt motor using same technique. The transfer function model of the motor is then used to design the pid controller to generate a set of coefficients associated with the desired. The output control method of a speed control circuit can be divided. Abstract the thesis describes about the concept of dc motor and. Varying the armature voltage in the constant torque region.
A fuzzy logic speed controller for separately excited dc motor and. A fuzzy logic speed controller for separately excited dc motor. Speed conrol of separately excited dc motor using fuzzy. One of the most important features of the dc motor is that their speed can easily be control according to the requirement by using simple methods. This paper proposes the speed control of a separately excited dc motor varying armature voltage. For this example, we will assume that the input of the system is. Speed control techniques of separately excited dc motor. Close loop control is done in two loop, first inner current loop having currenttorque controller and outer speed controller loop control the speed. Full text of speed conrol of separately excited dc motor. Speed control of separately excited dc motor using chopper. Pdf speed control of separately excited dc motor using. Pid controller design for a dc motor file exchange matlab. Abstract the aim of the paper is to control the separately excited dc motor by using the igbt based chopper.
Speed control of dc motor using chopper linkedin slideshare. The separately excited dc motor can be controlled from below and up to rated speed. Mathematical modeling and close loop speed control of separately excited dc motor. Due to this the speed can be controlled for below rated speed and speed above the rated speed, respectively. Fuzzy speed control of separately excited dc motor using. May 07, 2014 speed control of separately excited dc motor exp no 1 set 1. When a separately excited motor is excited by a field current of if and an armature current of ia flows in the circuit, the motor develops a back emf and a torque to balance the load torque at a particular speed. This paper presents the speed control of a separately excited dc motor sedm using a speed controller designed to vary the armature voltage. For the proposed dc motor case, there are 9 fuzzy rules designed for fuzzy logic controller.
The speed of dc motor has been controlled by controlling the armature voltage by using thyristors. Dc motor brochure singles tecowestinghouse motor company. Pdf armature voltage speed control of a separately. Concepts of dc motor for there are two types of motor. The electric circuit of the armature and the freebody diagram of the rotor are shown in the following figure. Speed control of separately excited dc motor moleykutty george.
Dc motors are widely used in industry because of its low cost, less complex control structure and wide range of. The aim of this work is to control the speed of a separately excited dc motor using combined armature voltage and field current control method with the following objectives. Optimization filter of speed is obtained using modulus hugging approach. The field of this motor is permanently connected across the dc supply lines. The characteristic of the dc generators explain the relations between the loads, excitation and terminals voltage through graph. Modeling block diagram of separately excited dc motor 2 2. Praveen kumar3, associate professor, mrec abstract this. By applying a variable voltage across its armature, any desired speed can. Write a power balance for a separately excited motor and compute its efficiency. Our research work aims at speed controlling of separately excited dc motor rather than selfexcited dc motor. Pid controller is used to control a simple dc motor modeled in simulink. Speed control of dc motor the speed of a dc motor is given by i flux control. Pdf control of separately excited dc motor researchgate.
Introduction the variable speed, reliability and high performance are three main characteristics of an electric drive system due to which it can be. Explain how changing motor load affects efficiency. Presentation on ieee topic, speed control of dc motor using triac. The methods are provided with their schematics and block diagram, the construction of each scheme was made in breadboard at the first. Such a fine speed control is generally not possible with a. Praveen kumar3, associate professor, mrec abstract this project presents a comparison of performance of controllers such as pi, pid controller, self tuned fuzzy controller for dc motor speed control. Indeed, the rle load shown in this figure may represent the electrical. In the constant power region, field flux should be reduced to achieve speed above the rated speed. Pdf dc motors are exceptionally eminent in various applications where speed is the foremost aspect such as industrial applications, robot manipulators. Matlab simulation for speed control of separately excited dc motor can be use to other types of motors. In armature control, speed controller has been used in outer loop while current controller in inner loop is used.
To see how to tune the pid controller, please see the video demo andor read the blog post. Large dc motors with separately excited fields were generally used with winder drives for mine hoists, for high torque as well as smooth speed control using thyristor drives. Pdf speed control of separately excited dc motor and performance analysis by software simulation has been done. The separately excited dc motor has some advantages compare to the others type of motors. Dc motor speed control using pid controller implementation. Modeling and speed control of separately excited dc motor. The transfer function net input n, again a scalar, is the sum of the weighted.
A fuzzybased speed control of dc motor using combined. Dc motors are widely used in industry because of its low cost, less complex control structure and wide range of speed and torque. When a separately excited motor is excited by a field current of if and an armature current of ia flows in the circuit, the motor develops a back emf and a torque to. Full text of speed conrol of separately excited dc motor using fuzzy technique see other formats aceee int. In fact, fine speed control is one of the reasons for the strong competitive position of d. Introduction the variable speed, reliability and high. Speed control of separately excited dc motor using triac. If external mechanical power is applied to a dc motor it acts as a dc generator, a dynamo. Characteristic of dc generators separately excited self. Speed control methods of the various speed control motors. The speed control of dc motor is very sophisticated and specific. I hope it will help me a lot to understand the speed control technique of dc motor. This paper presents the speed control of a separately excited dc motor using fuzzy logic control flc.
Lab based analysis of speed control of dc motor by using. Draw a circuit model of a separately excited dc motor. So can you please me what all the changes i need to make in the circuit as well as the code for the microcontroller. Separately excited dc motors the field winding is excited from a supply which is not connected to the armature winding. Speed of dc motor can be varied by following methods armature voltage control for below base speed field flux. Depending upon the type of connections to the field winding for excitation, the dc motors can be classified into two categories. A separately excited dc motor with name plate ratings of 300kw, 40 0vdc, 50 radsec is used in all simulations. The speed of separately excited dc motor can be control by changing the armature voltage. Closed loop control, separately excited dc motor and dc motor.
A statespace controller for dc motor position control the electric circuit of the armature and the free body diagram of the rotor are shown in the following figure. You can also visit the web page with resources for designing and tuning pid controllers. Speed of dc motor can be varied by following methods armature voltage control for below base speed field flux control for above base speed armature resistance control here, we are using armature voltage control method for speed control. It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational motion. Speed control of a separately excited dc motor engineering essay.
The speed control techniques of separately excited dc motor in the highspeed sedm are. The speed of separately excited dc motor can be control by changing the armature voltage and changing field flux. The rules are in if then format, where the if side is called the. With the the increasing use of power semicondutor units, the speed control of dc motor is increasingly getting sophisticated and precise. Speed control of separately excited dc motor and performance analysis by software simulation has been done. So the control for above the rated speed can be achieved by controlling of field flux. Characteristic of dc generators separately excited self excited and compound generator characteristic is the graph between the two dependent quantities. Identify and utilize equations that represent motor performance to solve separately excited dc motor problems. It shows the steady state characteristic of dc generators.
A separately excited dc motor with name plate ratings of 300kw, 40 0v dc, 50 radsec is used in all simulations. Pdf speed control of separately excited dc motor using chopper. This paper presents the speed control of a separately excited dc motor using neural network nn controller in field weakening region. For the proposed dc motor case, we recommend 7 fuzzy rules for fuzzy logic controller. Dc motor speed control system the speed control of a motor is frequently required in industrial applications, robotics, home appliances, etc. This paper also discusses speed control of a sedm using chopper circuit. For this example, we will assume the following values for the physical parameters. The novelty of this paper lies in the application of nonlinear autoregressivemoving averagel2 controller for the speed control of sedm. Fuzzy controller design the objective of this case study is to perform the speed control of a separately excited dc motor figure 1 using fuzzy logic controller flc. The speed of the motor is controlled from 0 to the. Introduction the variable speed, reliability and high performance are three main characteristics of an electric drive system due to which it can be easily controlled. Types of dc motors separately excited motor shunt excited motor series excited motor compound excited motor permanent magnet pm motor. To control the speed of a separately excited dc motor using the independent armature voltage and field control methods. These are now replaced with large ac motors with variable frequency drives.
Complete layout for dc motor speed control 2problem statement. Pdf speed control of separately excited dc motor with efficiency. Dc motors designed for your application dc motor applications tecowestinghouse motor company dc motors are ideally suited. By simplifying the above motor model, the overall transfer function be. Matlabsimpowersystems model of a separately excited dc motor speed control 229 am.
The basic difference between the two types is that selfexcited dc motor is initiated by its own field circuit while separately excited dc motor is initiated by an external input supply. Speed control of separately excited dc motor by ppt 2 free download as powerpoint presentation. The controller will be designed based on the expert knowledge of the system. Dc motor speed control using pid controller implementation by. Dc motor speed control using pic microcontroller pwm method. Matlab closed loop control of chopper fed dc motor. Armature resistance control and field flux control the dc motor converts the mechanical power into dc electrical power. Speed control methods of various types of speed control. Oct 17, 2014 mathematical modeling and close loop speed control of separately excited dc motor.
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