Speed control of dc shunt motor using matlab simulink software

Simulation of voltage and current in series circuit matlab. Speed control of dc motor under varying load using pid. To control the speed of dc motor with pid controller using matlab simulink application. A pwm controlled fourquadrant chopper is used to feed the dc motor. Speed control of dc shunt motor by armature control. The analysis and results show that the simulation models in the study can be used directly in and out of class, and the programming ability of the student also may be developed. All motors have been sized for roughly the same mechanical power rating. These simulation models are developed as a part of a software laboratory to support and enhance undergraduate. Shunt motor with electrical and torque characteristics simulink. The dc shunt motor is 120vdc with rated speed of 1800 revolutions per minute.

To compare and analyze the result between the simulation result using a dc motor mathematical model in matlab simulink and the experimental result using the actual motor. The purpose of this experiment is to design and implement a closeloop speed control of a dc motor drive. Matlab simulink model of pi controller for the speed control of dc motor from the laboratory studies it is proved that pi controller is best in all other controlling techniques. The main objective of this paper is to minimize transient response specifications chosen as rise time, settling time and overshoot, for better speed response of dc shunt motor. In this video, were going to learn what pwm, or pulse width modulation is and how its used to control the speed of a bldc motor. Pdf modeling and simulation of dc motor speed regulation by.

Previously, we discussed how we can control a bldc motor at varying speeds by adjusting the dc voltage provided to the threephase inverter. In armaturecontrolled dc motors, the applied voltage va controls the angular velocity w of the shaft. The shunt motor block represents the electrical and torque characteristics of a shunt. Automatic speed controller of a dc motor using arduino. Dc motor speed control using matlabsimulink youtube. The dc link voltage is adjusted through a dc dc buck converter. It also adds a few of the blocks commonly used in simscape. The backemf is given by lafifiaw, where if is the field current, ia is the.

This paper describes the matlab simulink realization of the dc motor speed control methods, namely. Close loop control is done in two loop, first inner current loop having currenttorque controller and outer speed controller loop control the speed. The objective of the paper is to develop a simulation of speed control and protection of dc shunt motor and analyze the characteristics of the. Speed control of a dc motor using bjt hbridge matlab. We shall use the same dc motor for which the parameters were calculated in the. Based on this data pi controller controls the duty cycles of the pwm pulses which corresponds to the voltage change required to maintain the speed. Complete matlab code, after editing it for dc motor control, is given at the end of this project. We can use this technique to control motor speed above its rated value.

Bldc motors offer many advantages over brushed dc motors. Matlab simulink model of the dc motor with compounded excitation initial values of this model are. This example shows two dc motor control techniques for reducing the sensitivity of w to load variations changes in the torque opposed by the motor load. Dc shunt motor, modeling, simulation, pid controller. Matlab simulink for position control of the motor, and verify its operation. To select the motor type, rightclick on the electric motor block, select variantoverride using and then the desired motor. Below are some tweaks we did for rotating the dc motor clockwise, anticlockwise and stop using. Pid controller is used to control a simple dc motor modeled in simulink. You can also visit the web page with resources for designing and tuning pid controllers. They have high efficiency and low maintenance and have been commonly used in home appliances, robotics, and the automotive industry.

Modeling and simulation of dc motor speed regulation by. To design the pid controller and tune it using matlab simulink. Automatic speed controller of a dc motor using arduino, for laboratory applications. This example shows how to control the rotor speed in a bldc based electrical drive. This paper describes a matlab simulink realization of the direct current dc motor speed control method by controlling the voltage applied to the field circuit of a separately excited dc motor in. Used existing mathematical models of the library of matlab simulink version 7. The backemf is given by lafifiaw, where if is the field current, ia is the armature current, and w is the rotor speed in radianss.

We use this method to increase the speed of these motors above the base speed. So it is possible to create characteristics of armature current ir, motor torque m, motor speed. The speed controller ac block represents a pi speed regulator model for ac machines used in vectorcontrolled drives. Learn how to automatically tune gains of a cascaded pid controller that controls the inner voltage and the outer speed loop of a brushless dc motor with a trapezoidal backemf. The threephase bldc motor and threephase power inverter have been modeled in simscape electrical. In this example, you model a dc motor driven by a constant input signal that approximates a pulsewidth modulated signal and look at the current and rotational motion at the motor output. A common actuator in control systems is the dc motor. If you would like to actually run the models developed above and use them to simulate and develop control algorithms, you may continue on to the dc motor speed. Dc motor speed control methods using matlabsimulink and. In this block dialog are the parameters that define the behavior of the motor. The dc motor block uses manufacturer datasheet parameters, which specify the motor as delivering 10w mechanical power at 2500 rpm and noload speed as 4000 rpm when run from a 12v dc supply.

Starting current at rated dc supply voltage starting current at rated dc. Design a speed controller for a dc motor using pulsewidth modulation pwm. The control subsystem uses a pibased cascade control structure with an outer speed control loop and an inner dc link voltage control loop. Modeling and simulation of the dc motor using matlab and. Field control method on separately excited dc motor. The torquespeed characteristic for the shunt motor block model is related to the. Simulink model of a full state observer for a dc motor. An inner feedback loop controls current and an outer feedback loop controls motor speed. This example shows how to simulate systems that span electrical and mechanical domains. Dc shunt motor speed control and analysis using ziegler. Speed control of a dc motor using pwm video matlab. Modelling and simulation of armaturecontrolled direct.

There is a limit to the maximum obtainable speed by this method due to poor commutation at week fluxes. Simulation of speed control and protection of dc shunt motor. This paper describes the speed control of a dc shunt motor using conventional controllers pid, imc and fuzzy logic controller based on matlab simulation program. A antiwindup technique is used in controller to avoid integrator windup problem. Equivalent circuit parameters are armature resistance ra 110 ohms, field resistance rf 2. We will now employ these models within simulink to simulate the system response and design different approaches to control. Abstract this paper describes the matlab simulink realization of the dc motor speed control methods, namely field resistance, armature voltage and armature resistance control methods, and feedback. Mathematical modeling of brushless dc motor and its speed. This paper presents a dc motor speed controlling technique under varying load condition. A mathematical model of the process has been developed using real plant data and then conventional controllers and fuzzy logic controller has been designed.

This paper describes the matlab simulink realization of the dc motor speed control methods, namely field resistance, armature voltage and armature resistance control methods, and feedback control system for dc motor drives. Speed control of dc shunt motor your electrical guide. It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational. The problem with this method is that when we increase the resistance, the slope becomes steeper. Experiment 5 dc motor speed control walter scott, jr. Mathematical modeling and close loop speed control of separately excited dc motor. An introduction to brushless dc motors learn the fundamentals of brushless dc motors bldcs. Speed control of a dc motor using controllers science. The difference between actual and required speeds is given as input to the controller. To see the completed model, open the pwmcontrolled dc motor example. Modeling and simulation of the dc motor using matlab and labview nicolae patrascoiu automatic and industrial information department, university of petrosani, romania. Modeling and speed control of separately excited dc motor. Simulation used in education for a separately excited dc motor.

Dc motor speed control methods using matlab simulink. The speed torque curve for shunt motor is shown below. The linear system model of separately excited dc motor with torquevariation is designed using pid controller. This example shows a cascade speed control structure for a dc motor. This paper discusses the speed and torque control of a shunt dc motor through matlab simulink simulations. To model our dc motor, the first thing that well need is a dc voltage source. A comparison of the torque speed characteristics for five different motor types. Speed control of a dc motor using bjt hbridge open model this example shows the simulation of an hbridge used to generate a chopped voltage and to control the speed of a dc motor. In this demonstration you will see how to quickly tune the pid controller for a planned model in simulink. Simulink modeling page we generated two different dc motor models in simulink. Dc motor speed control in matlab the engineering projects. The motor and driver are modeled as a single masked subsystem. The performance analysis of the modeled system shows that usage of feedback enhances the performance of the transient response of the armature controlled dc motor. Here, in this tutorial i will explain about how can make a program for dc motor speed control in matlab by creating a gui having different buttons on it to control the direction of rotation of the dc motor as well as the speed of the dc motor by sending different commands through the serial port.

Control tutorials for matlab and simulink motor speed. This model shows how to use the controlled pwm voltage and hbridge blocks to control a motor. Modelling and simulation of speed control of dc shunt motor using. To see how to tune the pid controller, please see the video demo andor read the blog post.