Function description: external control board, it applies no HALL mode with which it can get such advantages: simplify motor production, reduce motor failure rate while increase motor working efficiency, increase performance consistency and reliability on mass production.
Working under speed control and double closed loop current control, it has brake function by which the chain saw rotation can be stopped very quickly; The function of time delay for power cutting after the tool is stopped working can achieve zero power consumption.

Protective functions: over current protection; low voltage protection; overheat protection (for control board and motor); motor blocking protection; starting up protection etc.