ABSTRACT
A speed sensor based on Hall's permanent magnet brushless DC motor speed control system applied to electric bicycles, and other low-power work, And the surplus power can return to collapse. The system has good speed performance, high power factor, energy efficiency, small size, light weight advantage.
This paper from the system start the functional requirements of the entire system is divided into four parts circuit, Control Strategy and Implementation of the analysis and discussion. Parts of the system control circuit is based on Intel's 8051 chip microcontroller, Under the permanent magnet brushless DC motor characteristics, Using the PWM control technology，Hall and through speed sensor measurement speed, Eight digital control using dynamic display of speed, This paper presents the various links with the hardware design of the whole system to meet the overall design requirements.
Keywords : Hall Effect Speed sensor Brushless DC motor PWM (Pulse Width Modulation)
