28-05-2012, 11:09 AM
Wireless Bluetooth Controller For DC Motor
Wireless Bluetooth Controller For DC Motor.ppt (Size: 5.97 MB / Downloads: 200)
Introduction
Wireless becoming more and more available and widely used
Bluetooth is one of the major players
Interested in power and motor control
Objectives
Wireless Controller for DC Motor
Bluetooth Wireless Standard
Windows based GUI
12 V Permanent Magnet Geared Motor
Battery powered
Variable speed
Applications
Robotics
Remote control car
Industrial Uses
Household Uses
Design Specs
Output voltage varying from 0-12 Vdc
Adjustable speed from 0 to 95 RPM
and 0 to 6222 RPM on load side
Motor can turn in both directions
Continuous motor loads of 15 W
Maximum motor torque of 2.12 N-m
Wireless control up to 60 feet
Bluetooth
PC Side:
Bluetooth USB Receiver for PC
Set up as COM port
Transmits USART serial data to WML-C40 Bluetooth Module
Motor Side:
BlueSMIRF WML-C40 Module
Vcc = 5 V, with internal regulator
Receives USART serial data from USB module
Transmits to PIC16F877 via serial TX
Microcontroller
PIC16F877 40 pin DIP
Programmed in C using CSS Compiler
Receives speed control signal from user software
Translates desired speed to necessary duty cycle
16 kHz internal clock used for timers
Sends duty cycle to H-bridge inputs using onboard PWMs