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Current digital sensor for AC motor controllers

A technology of digital sensors and AC motors, applied in the direction of using digital measurement technology for measurement, etc., to achieve the effects of reducing ratio difference, optimizing the system, and increasing heat dissipation costs

Pending Publication Date: 2017-03-15
杭州亿为科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] How to overcome the defect of the current detection of the existing electric vehicle AC motor controller is exactly the problem to be solved by the present invention

Method used

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  • Current digital sensor for AC motor controllers
  • Current digital sensor for AC motor controllers
  • Current digital sensor for AC motor controllers

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Embodiment Construction

[0049] The current digital sensor for the AC motor controller according to the present invention is as Figure 1 to Figure 10 shown. The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0050] A current digital sensor for an AC motor controller, consisting of an upper cover 1, a lower cover 2, a microcrystalline annular iron core body 5, a PCB board 6, a single-chip microcomputer 12, and a Hall element 13, the main points of which are:

[0051] In the closed space formed by the upper cover 1 and the lower cover 2, a microcrystalline annular iron core body 5 and a PCB board 6 are packaged, and the microcrystalline annular iron core body 5 is made of a microcrystalline thin strip according to Archimedes A circular column formed by winding a German spiral, with a rectangular cutout 11 on the circular column;

[0052] The PCB board 6 is welded with a single-chip microcomputer 12 and a Hall element 13, ...

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Abstract

A current digital sensor for AC motor controllers is composed of an upper cover, a lower cover, a microcrystalline toroidal core body, a PCB, a single chip microcomputer, and a Hall element. The current digital sensor is characterized in that the microcrystalline toroidal core body and the PCB are packaged in a closed space formed by the upper cover and the lower cover; the microcrystalline toroidal core body is a cylinder formed by winding a microcrystalline thin tape according to the Archimedes spiral, and the cylinder has a rectangular notch; and the single chip microcomputer and the Hall element are welded on the PCB, and the Hall element is arranged in the middle position of the rectangular notch of the microcrystalline toroidal core body. A systematically integrated modular structure is adopted. A current detection component and a data processing component are integrated in one shell. The single chip microcomputer implements coordination as a core device. The traditional method of current detection using a sampling resistor and a comparison circuit is abandoned completely. Maximum saving of the system and overall optimization are achieved.

Description

technical field [0001] The invention relates to a current digital sensor, which is mainly used for three-phase current detection and detection of an AC motor drive controller of an electric vehicle. Background technique [0002] Current detection is one of the most important detection technologies for AC motor controllers of electric vehicles. At the moment when the AC motor is locked or a surge current occurs, if the harmful damage to the limit of the VMOS tube or IGBT module can be detected at the first time The inrush current and the timely shutdown of the current channel of the power device are one of the effective protection measures to prevent the motor power control module from being burned. [0003] The three-phase current detection of the electric vehicle drive motor controller usually uses high-efficiency constantan wire or constantan plate alloy as the sampling resistor, which is directly used as a component in the three-phase current loop of the motor controlle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 张金泉
Owner 杭州亿为科技有限公司
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