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Intelligent motor protector

An intelligent motor and protector technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of low precision and single function, and achieve the effect of improving installation efficiency, simplifying the adjustment process, and high measurement accuracy

Active Publication Date: 2013-11-20
巨元智能电气(浙江)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of low precision and single function in the prior art, the present invention provides a novel intelligent motor protector

Method used

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Examples

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Embodiment 1

[0030] Intelligent motor protector, such as Picture 9 As shown, it includes a current sampling circuit 1, a power supply circuit 2, a voltage sampling circuit 3, a signal processing unit 4, a central processing unit 5, and a control module 6. Among them, the current sampling circuit 1 uses a current sensor 7 to respectively connect the three live wires of the motor for current For sampling, the output terminal of the power supply circuit 2 is connected to the voltage sampling circuit 3, and the output terminals of the current sampling circuit 1 and the voltage sampling circuit 3 are connected to the signal processing unit 4. The signal processing unit 4 includes a precision half-wave rectifier circuit and an operational amplifier, and a precision half-wave rectifier The circuit rectifies the sampled signal, and the operational amplifier amplifies the rectified sampled signal. The output of the signal processing unit 4 is connected to the sampling port of the central processing u...

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Abstract

The invention relates to automation control and motor protectors and discloses an intelligent motor protector, comprising a current sampling circuit, a power supply circuit, a voltage sampling circuit, a signal processing circuit, a central processing unit and a control module. The intelligent motor protector has the advantages of being compact in structure, high in current rectifying and sampling precision, capable of displaying the current value in real time in the operation process of a motor, and has multiple functions of undervoltage property, overvoltage, short circuit, three-phase unbalance protection and remote communication, and has higher practical value.

Description

Technical field [0001] The invention relates to an automatic control and motor protection device, in particular to an intelligent motor protector. Background technique [0002] The function of the motor protector is to provide comprehensive protection and control for the motor. When the motor has overcurrent, undercurrent, open phase, locked rotor, short circuit, overvoltage, undervoltage, leakage, three-phase imbalance, overheating, grounding, bearing wear, When the stator and rotor are eccentric, the winding aging will give an alarm or protection control. Due to the emergence of production automation and various automatic control and sequence control equipment, the motor will be in the frequent switching state of starting, braking, forward and reverse, intermittent and variable load for a long time. In addition, the operation requirements of the motor are increasing. The higher the operating environment is, the more demanding it is, and higher requirements are placed on the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/08
Inventor 黄新知周海波
Owner 巨元智能电气(浙江)有限公司
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