Patent ID: 6593715
Filing Date: 2003-07-15
Classification: H02P

Abstract:
A single-phase motor with a conversion circuit, comprisinga two-phase motor drivel IC comprising a first output, a second output, and a ground, wherein the driver IC is a US79KUA IC comprising a DC voltage-regulating circuit module, a control and protection circuit module, and a Hall latch module; a coil including a first end and a second end; and a conversion circuit connected to the first output and the second output of the driver IC, the conversion circuit including a first transistor and a third transistor connected to the first end of the coil, and a second transistor and a fourth transistor connected to the second end of the coil, the first, second, third, and fourth transistors forming a complementary type driver circuit, the first output and the second output of the drivel IC being alternately turned on and off to control a direction of current from the first end to the second end of the coil and vice versa, the coil thereby generating alternative magnetic fields for driving a rotor, wherein the conversion circuit further comprises a fifth transistor and a sixth transistor, the fifth transistor and the sixth transistor together forming an on/off control circuit and being respectively connected to the first output and the second output of the driver IC, the fifth transistor and the sixth transistor respectively controlling on/off of the third transistor and the fourth transistor, wherein the Hall latch module of the driver IC detects a specific period of the change in the magnetic field generated by the permanent magnet of the rotor, wherein when the first output of the driver IC turns the fifth transistor on while the second output turns the sixth transistor off, the current passes the first transistor, the second end of the coil, the first end of the coil, and the fourth transistor, and wherein when the first Output of the driver IC turns the fifth transistor off while the second output turns the sixth transistor on, the current passes the second transistor, the first end of the coil, the second end of the coil, and the third transistor, and further comprising two sets of voltage dividing circuits for respectively controlling the fifth transistor and the sixth transistor and for dividing voltages, each of the sets of voltage dividing circuits including plural resistors.