The invention relates to an application-specific
integrated circuit which is controlled by a switch
reluctance motor, wherein the structure mainly comprises a three-phase
electric current chopped wave module which can change time
delay length of chopped wave, a two-step commutating module which can change time
delay length, two PWM generating modules which are respectively set for cycle and
duty cycle and a counting and generating function module for positioning and angle controlling signals. The application-specific
integrated circuit has the advantages that angle control of the switch
reluctance motor can be finished through full
hardware application-specific integrated circuits, concrete closed-
loop control is still realized by a
microprocessor, the property requirement of the
microprocessor is led to greatly reduce, the application-specific
integrated circuit can be applied to wide range of rotating speed, in particular to high speed and super high speed range, and has strong anti-interference property, avoid compiling position to calculate
software, and the reliability of the
system is increased. The integrated circuit also integrates common controlling modules such as error protection,
electric current chopped wave, SPI communicating management and the like, and further reduces the hardware cost and development cost of the controlling device, simplifies complex degree of the switch
reluctance motor controlling device, and increases working stability and reliability of the
system.