Multi Motor Control System Using Can Bus

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  • Topic: Control engineering, Pulse-width modulation, Serial communication
  • Pages : 2 (317 words )
  • Download(s) : 396
  • Published : June 13, 2012
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+++Multi-motor Control System Design Based on Can Bus
Intro:
Motor is used in many industries for various purposes. it acts as a bridge between man and machine. Even though we use different types of motor we need a control unit to control the motor. Controlling plays a vital role in industries. Typical industries may use hundreds of motor and hence they need a individual control unit for each motor.

Existing System:
Each motor is provided with individual motor control unit will increase the cost, complexity, maintenance and increase in wiring harness which cause difficulty in error finding and debugging. The installation of the control unit must be placed near the motor itself hence it requires more efficient working areas.

Proposed System:
In our system each and every individual motor unit is been grouped by an individual network called CONTROL AREA NETWORK (CAN) Bus. it is a two wire serial communication protocol in which N number of nodes can be connected to form a network. Hence the number of controlling unit used can be reduced, achieve greater efficiency and efficient usage of area is achieved.

Working:
The Motor controlling node will be connected with two potentiometers to control the individual speed of each motor. The potentiometer is been connected with ADC of the Microcontroller .the motor nodes will receives the data from the control node and generate PWM signals accordingly and this PWM signal is been given to a motor driver and the motors are been driven individually. The communication between the control node and the Motor node is provided by Control Area Network.

Block Diagram:
Control Keys
I/O
POT 1
ADC
NODE 1

CAN ECU
LCD Display

NODE 2
CAN ECU
Motor
Driver
Motor
PWM

NODE 2
CAN ECU
Motor
Driver
Motor
PWM
ADC
POT2...
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