| 摘要 |
PURPOSE:To simplify the circuit configuration of a 3-phase brushless motor by driving a coil for 2-phase in drive circuits of two sets which input the outputs of two position detectors and driving the coil of the third phase with the resultant output signal of the drive circuit. CONSTITUTION:The pole position of a rotor 15 is detected by position detectors 11a, 11b, the detection signals are respectively amplified by amplifiers 12a, 12b, applied to points A and B, coils 13a, 13b are respectively amplified by the output signals of the amplifiers 12a, 12b, and a coil 13c is excited by the resultant vector signal of the output signals of the amplifiers 12a, 12b. Accordingly, since the detectors 11b is shifted by 2pi/3 to the detector 11a, the applied voltage of the coil 13b to that of the coil 12a is shifted by 2pi/3, and the applied voltage of the coil 13c is shifted by 2pi/3 to that of the coil 13a, and to that of the coil 13b, thereby enabling continuous rotation. |
