Electric signal acquisition system and method of three-phase motor

Abstract

The invention provides an electric signal acquisition system and method of a three-phase motor, and belongs to the technical field of electronics. The system comprises a three-phase upper half bridge arm, a three-phase lower half bridge arm, a micro-control unit and a first resistor; the first ends of the three-phase upper half bridge arm are connected with a first power supply, the control ends of the three-phase upper half bridge arm are respectively connected with the first control end, the second control end and the third control end of the micro-control unit, and the second ends of the three-phase upper half bridge arm and the first ends of the three-phase lower half bridge arm are respectively connected with three-phase binding posts of a three-phase motor; control ends of the three-phase lower half bridge arm are respectively connected with the fourth control end, the fifth control end and the sixth control end of the micro-control unit, and second ends of the three-phase lower half bridge arm are grounded through the first resistor; and each detection end of the micro-control unit is respectively connected with the first end of the three-phase lower half bridge arm and the three-phase binding post of the three-phase motor or the first end of the first resistor. According to the invention, the effects of reducing energy consumption, failure rate and cost can be achieved.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular, to an electrical signal acquisition system and acquisition method for a three-phase motor. Background technique [0002] With the development of electronic technology, three-phase motors have been applied to various equipment, such as electronic mopeds, electric vehicles, elevators and other equipment. Generally, the operating state of the three-phase motor can be controlled by controlling the output current of the three-phase bridge arm drive circuit in the controller of the three-phase motor. In order to ensure the safe operation of the three-phase motor, it is necessary to control the phase current of the three-phase motor Collection monitoring. [0003] In the related art, the three-phase bridge arm driving circuit of the three-phase motor generally has three upper bridge arms of U phase, V phase and W phase and three lower bridge arms of U phase, V phase and W p...

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Problems solved by technology

[0004] However, this solution has the problems of using many components and complex circuits, which leads to the problems of high energy consumption, high failure rate and high cost of this solution.

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