Abstract
With the constant advancement of modern society, the environment and energy
issues more and more people's attention. As fuel vehicle emissions caused by
environmental pollution, noise pollution and oil resources of the crisis, non-polluting,
low noise and the electric energy-saving modes of transport has become the world's
hot spots developed countries. Electric bicycles as the most simple of electric
vehicles in recent years around the world especially in the Asian region has made
tremendous progress.
The operation of electric bicycles and general industrial applications different,
the drive system of higher demand for electric bicycle motor vehicle reliability, and
in a harsh environment of long-term work. Brushless DC motor drive inverter used
for the conduct of electronic switch, with no change to spark strong anti-interference,
reliable operation, maintenance is simple, long life and other advantages of using
permanent magnet electric bicycles in general as BLDCM Electric drives.
Electric Bicycle control system designed to run electric bicycles played a very
important role. SCM used for the control of the motor controller core than ever
before with analog circuits, digital circuits, ASIC caused by controllers, the functions
and overall performance has greatly improved. In this paper, designed by Electric
Bicycle control system to ATMEL's AT89C2051 SCM control as the core, from Hall
governor handles, from A / D converter, brakes, motor-driven and under-voltage
circuit, overcurrent protection circuits, and other groups 10%. Through the integrated
hardware and software design, with under-voltage protection, overcurrent protection,
brake power and other protection.
Key words: Electric bicycles； Eermanent magnet brushless DC motor；
Control system； Overcurrent protection
