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Smart Motor Protector

A technology of intelligent motors and protectors, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as single function and low precision, and achieve the effects of simplifying the adjustment process, improving installation efficiency, and improving compatibility

Active Publication Date: 2018-01-09
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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Smart motor protectors such as Figure 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, wherein the current sampling circuit 1 uses a current sensor 7 to connect the three live wires of the motor to conduct current Sampling, the output end of the power supply circuit 2 is connected to the voltage sampling circuit 3, the output ends 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 rectification circuit and an operational amplifier, and the precision half-wave rectification The circuit rectifies the sampling signal, the operational amplifier amplifies the rectified sampling signal, the output end of the signal processing unit 4 is connected to the sampling port of the central processing unit 5, the output end ...

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PUM

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Abstract

The invention relates to an automatic control and motor protection device, and discloses an intelligent motor protector, which includes a current sampling circuit, a power supply circuit, a voltage sampling circuit, a signal processing unit, a central processing unit and a control module. The invention has the advantages of simple structure, high accuracy of current setting and sampling, real-time display of current value during motor operation, multiple functions such as overvoltage, undervoltage, short circuit, three-phase unbalance protection and remote communication, etc. High 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 to the motor. In the event of overcurrent, undercurrent, phase failure, stalled rotor, short circuit, overvoltage, undervoltage, leakage, three-phase imbalance, overheating, grounding, bearing wear, When the stator and rotor are eccentric and the winding is aging, an alarm or protection control is given. Due to the emergence of production automation and various automatic control and sequence control equipment, the motor will be in the state of frequent switching of starting, braking, forward and reverse, intermittent and load changing for a long time. In addition, the operation requirements of the motor are becoming more and more The higher the temperature, the more harsh the operating environment, which puts forwa...

Claims

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Application Information

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Patent Type & Authority Patents(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