Speed control of dc shunt motor using matlab simulink software

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. This example shows how to simulate systems that span electrical and mechanical domains. Modeling and simulation of the dc motor using matlab and. The control subsystem includes the outer speed control loop, the inner current control loop, and the pwm generation. This model shows how to use the controlled pwm voltage and hbridge blocks to control a motor. Previously, we discussed how we can control a bldc motor at varying speeds by adjusting the dc voltage provided to the threephase inverter. Speed control of dc motor under varying load using pid. Modeling and simulation of dc motor speed regulation by. The backemf is given by lafifiaw, where if is the field current, ia is the.

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. The motor and driver are modeled as a single masked subsystem. Speed control of a dc motor using bjt hbridge matlab. 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. A linear model of the system can be extracted from the simulink model into the matlab workspace. 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.

Automatic speed controller of a dc motor using arduino, for laboratory applications. Modeling and speed control of separately excited dc motor. A pwm controlled fourquadrant chopper is used to feed the dc motor. Speed control of a dc motor using controllers science. The speed torque curve for shunt motor is shown below. Bldc motors offer many advantages over brushed dc motors. In armaturecontrolled dc motors, the applied voltage va controls the angular velocity w of the shaft. 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. We use this method to increase the speed of these motors above the base speed. 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. Simulation used in education for a separately excited dc motor.

They have high efficiency and low maintenance and have been commonly used in home appliances, robotics, and the automotive industry. Modelling and simulation of armaturecontrolled direct. Automatic speed controller of a dc motor using arduino. 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. In this demonstration you will see how to quickly tune the pid controller for a planned model in simulink. Starting current at rated dc supply voltage starting current at rated dc. Matlab simulink model of the dc motor with compounded excitation initial values of this model are. In shunt dc motors the variable resistance inserted as, field control method on shunt dc motor. Simulation of voltage and current in series circuit matlab. This example shows a cascade speed control structure for a dc motor. Mathematical modeling and close loop speed control of separately excited dc motor. To see the completed model, open the pwmcontrolled dc motor example. A comparison of the torque speed characteristics for five different motor types.

The speed controller ac block represents a pi speed regulator model for ac machines used in vectorcontrolled drives. You can also visit the web page with resources for designing and tuning pid controllers. Dc shunt motor, modeling, simulation, pid controller. 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. Speed control of dc shunt motor your electrical guide. Dc motor speed control methods using matlab simulink. The purpose of this experiment is to design and implement a closeloop speed control of a dc motor drive. This paper discusses the speed and torque control of a shunt dc motor through matlab simulink simulations. This paper describes the matlab simulink realization of the dc motor speed control methods, namely. This example shows how to control the rotor speed in a bldc based electrical drive. We will now employ these models within simulink to simulate the system response and design different approaches to control. The linear system model of separately excited dc motor with torquevariation is designed using pid controller.

Modeling and simulation of the dc motor using matlab and labview nicolae patrascoiu automatic and industrial information department, university of petrosani, romania. A common actuator in control systems is the dc motor. 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. Pid controller is used to control a simple dc motor modeled in simulink. Simulation of speed control and protection of dc shunt motor. This model of a brushless dc motor uses a standard configuration. This paper presents a dc motor speed controlling technique under varying load condition. Speed control of dc shunt motor by armature control. There is a limit to the maximum obtainable speed by this method due to poor commutation at week fluxes. A antiwindup technique is used in controller to avoid integrator windup problem. The torquespeed characteristic for the shunt motor block model is related to the. Dc motor speed control in matlab the engineering projects. An introduction to brushless dc motors learn the fundamentals of brushless dc motors bldcs. A mathematical model of the process has been developed using real plant data and then conventional controllers and fuzzy logic controller has been designed.

In this block dialog are the parameters that define the behavior of the motor. 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. The problem with this method is that when we increase the resistance, the slope becomes steeper. These simulation models are developed as a part of a software laboratory to support and enhance undergraduate. In a shunt motor, the field and armature windings are connected in parallel. 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. The difference between actual and required speeds is given as input to the controller. Matlab simulink for position control of the motor, and verify its operation.

The control subsystem uses a pibased cascade control structure with an outer speed control loop and an inner dc link voltage control loop. Below are some tweaks we did for rotating the dc motor clockwise, anticlockwise and stop using. 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. An inner feedback loop controls current and an outer feedback loop controls motor speed. To select the motor type, rightclick on the electric motor block, select variantoverride using and then the desired motor. Dc motor speed control using matlabsimulink youtube. Close loop control is done in two loop, first inner current loop having currenttorque controller and outer speed controller loop control the speed.

Dc shunt motor speed control and analysis using ziegler. Complete matlab code, after editing it for dc motor control, is given at the end of this project. Speed control of a dc motor using pwm video matlab. We can use this technique to control motor speed above its rated value.

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. All motors have been sized for roughly the same mechanical power rating. To see how to tune the pid controller, please see the video demo andor read the blog post. The threephase bldc motor and threephase power inverter have been modeled in simscape electrical. The dc link voltage is adjusted through a dc dc buck converter.

It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational. Shunt motor with electrical and torque characteristics simulink. To control the speed of dc motor with pid controller using matlab simulink application. 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. 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. Experiment 5 dc motor speed control walter scott, jr. To design the pid controller and tune it using matlab simulink.

Simulink modeling page we generated two different dc motor models in simulink. It also adds a few of the blocks commonly used in simscape. 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. Equivalent circuit parameters are armature resistance ra 110 ohms, field resistance rf 2. Pdf modeling and simulation of dc motor speed regulation by. In addition the result obtained shows that at different input voltages, the speed the dc motor is. So it is possible to create characteristics of armature current ir, motor torque m, motor speed. 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. We shall use the same dc motor for which the parameters were calculated in the. The shunt motor block represents the electrical and torque characteristics of a shunt.

Mathematical modeling of brushless dc motor and its speed. 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. The dc shunt motor is 120vdc with rated speed of 1800 revolutions per minute. This example shows the starting of a 5 hp 240v dc motor with a threestep. Design a speed controller for a dc motor using pulsewidth modulation pwm. To model our dc motor, the first thing that well need is a dc voltage source. Dc motor speed control methods using matlabsimulink and. Field control method on separately excited dc motor. 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. Modelling and simulation of speed control of dc shunt motor using. 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.