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Motor overvoltage protection circuit, undervoltage protection circuit, voltage protection circuit and motor

An overvoltage protection circuit and voltage protection technology, which is applied in the fields of undervoltage protection circuit, motor overvoltage protection circuit, voltage protection circuit and motor, can solve the problems of lack of voltage protection, achieve undervoltage protection and reduce chip resources requirements, the effect of a simple circuit structure

Inactive Publication Date: 2019-11-05
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a motor over-voltage protection circuit, under-voltage protection circuit, voltage protection circuit and motor, to overcome the lack of the existing technology for using non-programmable DC brushless motor to drive the main control chip The problem of motor DC bus voltage protection

Method used

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  • Motor overvoltage protection circuit, undervoltage protection circuit, voltage protection circuit and motor
  • Motor overvoltage protection circuit, undervoltage protection circuit, voltage protection circuit and motor
  • Motor overvoltage protection circuit, undervoltage protection circuit, voltage protection circuit and motor

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0026] The technical features involved in different embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0027] figure 1 A schematic structural diagram of the motor overvoltage protection circuit provided by the embodiment of the present invention is shown, as sho...

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Abstract

The invention provides a motor overvoltage protection circuit, undervoltage protection circuit, voltage protection circuit and a motor. The motor overvoltage protection circuit comprises a first controllable switch of which the control end receives a bus voltage acquisition signal of the motor and the first end is grounded; and a second controllable switch of which the control end is connected with the second end of the first controllable switch, the first end is grounded and the second end is connected with the fault detection end of the driving chip of the motor. The overvoltage protection of the motor is realized by the motor overvoltage protection circuit. The motor overvoltage protection circuit has the characteristics of simple circuit structure, low cost and wide application range.The overvoltage protection is realized by utilizing the inherent protection function of the driving chip without occupying the existing working circuit port so that the requirements of the overvoltageprotection function on the chip resources can be reduced without influencing the existing protection function of the circuit.

Description

technical field [0001] The invention relates to the technical field of protection circuits, in particular to motor overvoltage protection circuits, undervoltage protection circuits, voltage protection circuits and motors. Background technique [0002] At present, DC brushless motors are more and more widely used in various industries, such as air conditioners, air purifiers, etc. This puts forward higher requirements on the performance, reliability and cost of DC brushless motors. Protection functions such as over-current protection, current-limiting protection, stall protection, over-temperature protection, over-voltage protection, and under-voltage protection have become important indicators for measuring the reliability of brushless DC motors. Among them, the overvoltage protection and undervoltage protection of the DC bus voltage belong to a kind of motor protection. When the DC bus voltage exceeds the voltage range that the components can withstand, it is easy to caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/09
CPCH02H7/09
Inventor 全威张晓菲敖文彬王颜章李宁
Owner GREE ELECTRIC APPLIANCES INC
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