To make the switch reluctance motor at different
speeds achieve the best braking effect, and that does not
cause excessive pumping voltage, combined the position
angle with full voltage shut down, angle position with
zero voltage remain open three steps, the two methods
have their own advantages and disadvantages, and at low
speed optimization turn-on angle and turn off angle, in
high speed optimization of zero voltage turn-on angle and
full voltage turn off angle, in a certain extent can reduce
the bus voltage pumping and decrease the over charging
current peak, also can meet the braking requirements, so
as to meet the needs of industrial.