Direct current brushless motor control method for water pump

Abstract

The invention discloses a direct current brushless motor control method for a water pump, and the method comprises the following steps: 1, the rotation motion process of a brushless motor is controlled, and the control of the motion process is that the direction of current flowing into a brushless motor coil is changed through the arrangement of two groups of MOS tubes, so that the motor rotates continuously; and step 2, current conduction time and frequency are controlled, the time and frequency are controlled by adjusting the current flowing through the two groups of MOS tubes in a PWM control mode. The beneficial effects of the invention are that the upper bridge arm of one group of bridge arms and the lower bridge arm of the other group of bridge arms are utilized, and the corresponding MOS transistors are continuously and alternately conducted, so that the continuous rotation of the motor can be realized, and the alternate conduction mode can protect a power supply from short circuit, and the service life of the motor is prolonged. And meanwhile, the conduction frequency and time of the current at the MOS tube are controlled in a PWM control mode, so that the rotation of the motor is more stable.

Description

technical field [0001] The invention relates to a motor control method, in particular to a DC brushless motor control method for a water pump, and belongs to the technical field of motor control. Background technique [0002] Brushless DC motors for water pumps are composed of a motor body and a driver. They are a typical mechatronics product. motor. [0003] The control of the existing DC brushless motor mostly uses two opposite MOS tubes to conduct the current conduction directly, so as to change the direction of the current flowing into the motor coil, and then through the interaction between the generated induced magnetic field and the original magnetic field. The function makes the motor rotate. This kind of current control method only conducts conduction by two opposite MOS tubes. When the motor works for a long time, it will cause a short circuit in the power supply and burn out the components. Contents of the invention [0004] The object of the present invention...

AI Technical Summary

Problems solved by technology

[0003] The control of the existing DC brushless motor mostly uses two opposite MOS tubes to conduct the current conduction directly, so as to change the direction of the current flowing into the motor coil, and then through the interaction between the generated induced magnetic field and the original magnetic field. The function makes the motor rotate. This kind of current control method is only conducted by two opposite MOS tubes. When the motor works for a long time, it will cause a short circuit in the power supply and burn out the components.

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