The model presents speed control of brushless dc motor. Speed control of dc motor using analog pwm technique which eased the use of dc motor movement used in many applications 2. We can achieve speed control of dc motor using mechanical or electrical techniques but they require large size hardware to implement but a microcontroller based system provides an easy way to control the speed of dc motor. This paper reports a microcontroller based control system to change the speed and direction of rotation of dc motor. Pulse width modulation, abbreviated as pwm, is a method of transmitting information on a series of pulses. Categories 2011 latest ece projects, ece and eee project abstracts, electrical projects, electronics abstracts, electronics projects topics. How to make a pwm dc motor speed controller using the 555 timer ic duration. The pic16f72 was used in 15 in the control method for dc motor armature voltage control that involves the pulse width modulation pwm based on the hbridge motor circuit. Most of these use analogue methods to generate the pwm signal which in turn drives a power mosfet or transistor. Pwm based speed control for dc motors full project available. But in terms of benefits of pwm, i thought they were that pwm gave peek torque at low rpm, but as ive learnt in practice, this isnt true as the motor sees simply an average lower voltage, and hence using lower current to drive the motor at slow speeds is. The paper deals with design of control for dc motor and analysis with focus on speed control.
The speed of a standard mechanically commutated dc motor is expressed by this equation. There is complete dynamic model of brushless dc motor. Pwm makes controlling speed of a dc motor via micro controller easier. Dc motor speed and direction control with pwm the demand of automation is increasing day by day. Programming the pic16f877a microcontroller for speed. Speed control of dc motor using analog pwm technique ijert. The optimization of dc motor uses requires speed control that can be done using pulse width modulation pwm 5. This drive can control a brushed dc motor in one direction. Analog technology, it offers a high degree of performance. Speed control of single phase induction motor using ac. The modulation of pulse width is obtained using cd4010b schmitt trigger and rectifier 1n4140.
In this tutorial we will see how to control the speed of a dc motor using pulse width modulation. The duty cycle is defined as the percentage of digital high to digital low plus digital high pulsewidth during a pwm period. The speed control of dc motor can be achieved by pwm direct transmission through rf 1. Speedcontrol techniques in acdc operated bldc applications to achieve four different steps of speed, 0. Explained industrial automation through rf base multi channel wireless remote controller which helps in. Block diagram of pwm based speed control of dc motor. In this paper, to control the speed of dc motor using pulse width modulation pwm method. For controller design two methods are used, namely frequency shaping method and pwm control. But in this tutorial, we are explaining simple and easy way by using the pulse width modulation pwm. There are lots of designs on the internet for dc power controllers using pulse width modulation pwm to control the speed of a motor or power to a resistive load. Im variable speed ac drives with vc technique has been popular in recent years for better performance set by dc drives.
Download a free power electronics control design trial. In our robotics applications we may have to control the speed of the dc motor. Pulse width modulation used for motor control electronicstutorials. Direct current dc motors have been widely used in many industrial applications such as electric vehicles, steel rolling mills, electric cranes, and robotic manipulators due to precise, wide, simple, and continuous control characteristics. Armature voltage is varied by pulse width modulation pwm of input dc voltage. Speed control of dc motor using pulse wi authorstream.
Picmicro dc motor control tips n tricks microchip technology. What we can control are eg and eg is the voltage applied to. There are many different ways to control the speed of dc motors but one very simple and easy way is to use pulse width modulation. Download speed control of dc motor using pwm technique pdf. Speed control of dc motor using pulsewidth modulation. We have explained pwm in this tutorial using 2 examples which will help you learn how to control led brightness using pwm and how to control dc motor speed using pwm. Pwm controlled high current dmos universal motor driver. Generally, a dc motor consists of either an electromagnet or a permanent magnet and a wounded coil known as the armature. Speed control of dc motor by pwm in proteus simulation. Pwm based dc motor speed control using microcontroller. Dc motor are mostly used in industries so we used to control the speed of the motor by using pwm. L293d ic is used to drive the motor which is made up of two hbridge. Speed control of dc motor with pc interface is an easy diy project. The pwm speed regulation of dc motor based on intelligent.
The modulation of pulse width is obtained using pulse width generator in atmega16 microcontroller. In this chapter, speed control of a dc motor using pulse width modulation pwm technique is described. Writing a pwm value to the ccp registers with a midrange. Design a speed controller for a dc motor using pulsewidth modulation pwm. For example in robotics it is generally used to control the moving speed of a robot whatever it may be path. Hello i have problem with my project speed control of dc motor using keypad and pwm. In this project, speed control is attained using pwm pulse width. Pulsewidth modulation pwm or dutycycle variation methods are commonly used in speed control of dc motors. Speed control of a dc motor using pwm video matlab. To control the speed of a motor, there are different ways. In the previous tutorials, dc motor direction control using arduino and dc motor direction control using matlab we have learnt that how to control the direction of the dc motor. The module is a small assembled device with an onboard trim pot to control the pulse width modulator output. A couple of years back, the automation of drives was very difficult due to the bad efficiencies of the components but after the invention of microcontrollers, it is very easy to control and automate the drives. A more efficient way to proceed is by using pulse width modulation technique to control the speed of our dc motor.
Speed up digital control design of dcdc converters with. The principles of pwm and hall sensor have been introduced by w. For creating and simulating the mathematical model matlab program with simulink extension was used. Also efficiently control brush dc motors with external mosfet. Speed control of dc motor using pulse width modulation, 555. Hello friends here is a proteus simulation of speed control of dc motor with the help of pulse width modulation pwm control, pwm signals are generated by 8051 microcontroller. In the example below, pin 3 is set as digital output mode. In this project dc motors speed is controlled by sending the command through pc. Here we are going to interface a dc motor to arduino uno and its speed is controlled. When pwm technique is used to control the speed of dc motor, the average. If you are new to electronics, we have a detailed article explaining pulse width modulation.
Arduino is directly connected to pc through the usb cable and command is. Guo 9 designed a highperformance lowcost lowloss wireless dc motor speed control unit. In this article we explain how to do pwm pulse width modulation control using arduino. What should i know about the speed control of dc motor. Dc motor speed controller witrh pwm am using a 555 timer to do it, dont forget to hit the like button and subscribe for more videos. The brushless dc motor is actually a permanent magnet ac motor whose torque current characteristics mimic the dc motor.
Dc motor speed control using arduino the engineering. This model of bldc motor can be used in sensorless control of bldc motor as well. Speed control of single phase induction motor using ac chopper by asymmetrical pwm technique. Pulsewidth modulation pwm, or pulseduration modulation pdm, is a technique used to encode a message into a pulsing signal. The adaptive fuzzy controller designed and implemented in 1 is an alternative method of using microcontroller to control the speed of a. Microcontroller based speed control of a dc motor using. Speed control of dc motor using pulse width modulation submitted by shakti mohan patnaik063261 abinash padhi063273 ritesh kumar lenka063262. Parameters a, z, p and k are all fixed by the physical construction of the motor in question. By using pwm we can easily control the average power delivered to a load and by thus we can easily control the speed of the dc motor. As we have discussed earlier that proteus is a really good simulation software for beginners and 8051 is the most basic among all microcontroller so this. Microcontroller based speed control of a dc motor using pwm technique v srikanth, g prasad, b c chakrapani, samule jaswanth, v ravi shankar, p sridhar department of. Pdf microcontroller based dc motor speed control using. Thus we conclude that the pwm technique is the most efficient for controlling the speed of the dc motor.
Actual speed of motor is compared with reference speed to control three phase inverter to adjust the terminal voltage. A brushless dc motor is a dc motor turned inside out, so that the field is on the rotor and the armature is on the stator. Speed control of a dc motor using pulsewidth modulation author. Dc motor speed control system using the microcontroller is developed and tested. Abstract this report focuses on controlling the speed of a dc motor using pwm technique. Firstly, mathematical model of dc motor was created. Speed control of dc motor with simple anolog circuits. Here is a sample program written to control a motor via the mosfet diagram of page 11 in onedirection only.
These packages have a leadfree second level interconnect. I have interfaced 4x3 keypad and 16x2 lcd, i want to control speed of dc motor using keypad input like 25% duty cycle 50% duty cycle etc. Speed control of dc motor by using pwm technique ppt, project report, circuit diagram. The modulation is a process of varying the parameter of a carrier signal in accordance with the. Controlling of dc motor using the pulse width modulation pwm. Therefore, in order to enhance dc motor speed control system of antijamming and robustness, and improve the response speed and stable precision of the speed regulation system, this paper discuss the pwm dc motor speed control system based on the fuzzy control and neural network control.
Here we will use a technique called pwm pulse width modulation to control the speed of dc motor. Mc33033 brushless dc motor controller on semiconductor. This feature is enabled in uno to get variable voltage over constant voltage. Speed control of brushless dc motor using microcontroller. My problem is in program that is i cannot stay in conditional loop after i enter value by keypad. Dc motor speed control using pwm with pic microcontroller. We used the commands c, a and s for the clockwise rotation, anti clockwise rotation and stopping the. Speed control of dc motor using pwm a pulse width modulation concept the purpose of a motor speed controller is to drive a system at the demanded speed. Pwm control using arduinohow to control dc motor and led. There are several methods for controlling the speed of dc motors. The speed control input signal dc, pwm, no terminal no speed control terminal, and. Dc motor speed control using pwm international journal of.
Direct current is applied to the armature by means of a carbon brush or by means of electromagnetic induction. Dc motor speed control using arduino uno circuitdigest. Weve described here a pwm based speed control circuit that smoothly controls the speed of generalpurpose dc motors. Speed control of dc motor using analog pwm technique written by nandkishor p.