Electric
drive car, has long been the use of the brushless motor, why not
electric wheelchair, looked at the advantages and disadvantages of both
the motor is not difficult to understand.
The characteristics of the brushless motor?
Advantages:
a)
the electronic exchange has always been to replace the traditional
mechanical commutation, reliable performance, never wear, low failure
rate, life expectancy than brushed motors increased by about six times,
representing the development direction of the electric car;
b) a static motor no-load current is small;
c) high efficiency;
d) small size.
Disadvantages:
a)
low-speed start there was a slight vibration, such as speed increased
commutation frequency increases, and not feel the vibration phenomenon;
b) price is high, the controller requires high;
c)
is easy to form a resonance, because any thing has a natural vibration
frequency, the vibration frequency of the brushless motor frame or
plastic vibration frequency of the same or close to it is easy to form
the resonance phenomenon, but by adjusting the resonance The phenomenon
is reduced to a minimum.Brushless motor driven electric car sometimes
makes a buzzing sound is a normal phenomenon.
d) foot when riding more effort, the best combination of electric drive with pedal power.