Driving mechanism and method for single phase motor

Abstract

The invention relates to a drive unit and a drive method of a single-phase motor, wherein two drive currents of the same direction are provided for a single-phase coil by means of a drive transistor group and an auxiliary drive transistor group; moreover, a control unit controls the switching on / off of the drive transistor group and the auxiliary drive transistor group according to the rotation position of the rotating device of a single-phase motor; therefore, drive current regeneration of the single-phase coil is realized so as to reduce the vibration and noise of the single-phase motor and prevent the halted state of the single-phase motor.

Description

technical field [0001] The invention relates to a single-phase motor, in particular to a driving device and a driving method for the single-phase motor. Background technique [0002] Please refer to Figure 1A~ Figure 1C Description about the driving device of single-phase motor in the prior art, Fig. 1A~ Figure 1B is a schematic block diagram of a driving device for a single-phase motor in the prior art, Figure 1C It is a timing diagram of the internal signals of the driving device of the single-phase motor in the prior art. This prior art driving device includes four driving transistors 102, 104, 108 and 110, two regenerative diodes 112 and 114, a single-phase coil 106, a Hall element 116, a comparison circuit 118, an absolute value circuit 120, and a detection device 122 And the control circuit 132. [0003] First, the Hall element 116 outputs a sine wave signal corresponding to the rotational position of the single-phase motor, that is, corresponding to the change of...

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Problems solved by technology

[0010] However, the change timing of the driving signals A, B, C, and D is slightly offset. When the transistors 2, 4 and the transistors 8, 10 are turned on or off in a complementary manner, the driving current on the one-way coil 6 has almost no effect. The slanted ineffective current that contributes to the torque causes the direction of the driving current of the one-way coil 6 to change sharply. As a result, the one-way motor has problems of vibration, noise and large power consumption

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