Abstract:
There are various methods for controlling the speed of a DC
motor. PWM technique is one of the most advanced and cost effective
method .It can be established using advanced Digital Signal Processor.
The digital signal processor (Microchip’s dspic30F2010) furnished with
dedicated motor control PWM module is utilized to drive the power
driving circuitry to get perfect duty cycle and frequency control. In this
working demo the controller is designed for low voltage type (12V) DC
motor and can easily convert to higher voltage ranges by increasing the
rated capacities of the power driving circuitries. MOSFETs are used as
switching device, in the power driving circuitry. Overload protection can
be achieved by using current shunt and feedback circuitry. The built in
Analog to digital converter of the DSP samples the circuit’s current and
switches off the driving circuit if overload situation arise.
A remote control on the speed and the direction of the motor is
established using a wireless remote control working at the frequency of
2.4GHz. This bidirectional communication ranges up to 1KM and hence
a remote monitoring of speed and direction is also possible, if a speed
feedback circuitry is added in addition as a futuristic of this project
The remote control is connected to a personal computer with a
GUI through which the operator can change the speed and direction.
