D.C. MOTOR SPEED CONTROL AND COMMUNICATION THROUGH CANBUS PROTOCOL
Keywords:CAN,Brushless DC motor, LM 35 temperature sensor, AVR controller, AVR studio.
This paper describes how to control the DC motor based on the parameters like temperature
changes using CAN protocol implementation. This Paper deals with the Control of DC Motor based upon
the temperature changes that occur in a process in Industry. The LM35 series are precision integrated
circuit temperature sensors, whose output voltage is directly proportional to the Celsius (Centigrade)
temperature. The Temperature changes are measured by the ADC and transmitted to the other node using
the CAN Bus and the data is received at the other node based upon the data received the speed of the DC
motor is Regulated using the PWM (pulse width Modulation) Technique. The Controller Area Network
(CAN) is a Serial, Asynchronous, Multi-master communication protocol for connecting electronic control
modules in Automobile and industrial applications. CAN have many features like less cost, Ease of
implementation, point to point Networking with powerful Error Checking and with High Transmission
Rate of 1MBitps.The CAN Network is a Peer to Peer Network consisting of different nodes. Different
parameters can be monitored by these Nodes and can be updated to the Central Control Unit. The CAN
bus is used in vehicles to connect engine control unit and transmission, or (on a different bus) to connect
the door locks, temperature control, seat adjustments etc.