Port pins P2.4 mode of the motor to continuous, rethrough P2.6 are connected to the inputs versible or jogging of inverters N3, N2 and N1 of 74LS04 5. the microcontroller are used for LED S7 Increase time Changes indication of run, stop, clockwise and S8 Decrease time the running anti-clockwise rotation. Port pins P2.0 through P2.3 of S6 Decrease speed 4. S4 Change the direction es and inEA pin (pin 31) of the microcontroller dicated by S5 Increase speed is connected to 5V to enable internal LED access. Capacitors C2 and S3 Change the mode ton switchC3 provide stability to the oscillator. A 12MHz crystal S1 To start motor controlled provides the basic clock frequency to S2 To stop the motor by pushbutthe microcontroller.
Switch S9 provides manual reset to Switch Function the motor the microcontroller. Start, Power-on reset signal for the miFunctions of stop and crocontroller is generated by the comDifferent Switches change of bination of capacitor C1 and resistor direction of R1. 3: Proposed panel arrangement for the DC motor controller various operations. Port pins P1.0 through P1.7 are connected to switches S1 through S8 for performing the Fig. Contrast of the LCD is set by preset VR1. Controlled through microcontroller AT89C51 2. Here are some of the features of this DC motor controller: 1. Using the DC drive you can program the motion of the motor, i.e., how it should rotate. But many of the DC drives have an inbuilt microcontroller that provides programmable facilities, message display on LCD, precise control and also protection for motors.
Some of the DC drives are just a rectifier with a series resistor that converts standard AC supply into DC and gives it to the motor through a switch and a series resistor to change the speed and direction of rotation of the motor. DC drive changes the speed and direction of motion of the motor. The motion of a DC motor is controlled using a DC drive. Of these, DC motors are widely used because controlling a DC motor is somewhat easier than other kinds of motors. Different types of motors-AC, DC, servo or stepper-are used depending upon the application. And it may be a flatbelt application, flow-control application or mixing of substances. Manufacturing plants in industries like chemical, pharmaceutical, plastic and textile, all require motion control. Otion control plays a vital role in industrial automation. 1: Circuit of the microcontroller-based DC motor controller Microcontroller-based DC Motor Controllerįig.