Unlock instant, AI-driven research and patent intelligence for your innovation.

Motor open-phase display protection device

A protection device and motor technology, which is applied in the direction of automatic disconnection emergency protection device, emergency protection circuit device, circuit device, etc., can solve the problems of occupying a large location of the electrical box, increasing costs, contact oxidation, etc., to achieve sensitive action, Low cost and long life effect

Inactive Publication Date: 2010-11-24
XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main motor of some equipment has such as figure 1 The traditional phase loss protection device shown in the figure requires 3 AC contactors, which takes up a large space in the electrical box and is expensive. When the motor is running normally, the coils of the 3 contactors are in the energized state. After a long time, the contactor Oxidation problems will occur, and if the contactor is replaced, it will increase the cost. If there are problems such as adhesion after the contact is oxidized, then the device will fail

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Motor open-phase display protection device
  • Motor open-phase display protection device
  • Motor open-phase display protection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: as figure 2 As shown, a motor phase loss display protection device is characterized in that: a motor phase loss display protection circuit is connected to the three-phase line of the three-phase four-wire system power supply line of the motor. The motor phase loss display protection circuit includes a parallel circuit of a resistor R in series with a DC relay ZJ and a capacitor C, and a parallel circuit composed of diodes D1, D2, diodes D3, and D4 connected in series with the parallel circuit. The connection between diodes D1 and D2 is In series relationship, the relationship between diodes D3 and D4 is also in series. Between diodes D1 and D2 is the input terminal of the entire motor phase loss display protection circuit. This terminal is connected to the three-phase line of the three-phase four-wire power supply line of the motor. The connection between diodes D3 and D4 is grounded.

Embodiment 2

[0012] Embodiment 2: as figure 2 As shown, a motor phase loss display protection device is characterized in that: a motor phase loss display protection circuit is connected to the three-phase line of the three-phase four-wire system power supply line of the motor. The motor phase loss display protection circuit includes a parallel circuit of resistor R in series with DC relay ZJ and capacitor C, and a parallel circuit composed of diodes D1, D2, diodes D3, and D4 connected in series with the parallel circuit. The connection between diodes D1 and D2 is In series relationship, the relationship between diodes D3 and D4 is also in series. Between diodes D1 and D2 is the input terminal of the entire motor phase loss display protection circuit. This terminal is connected to the three-phase line of the three-phase four-wire system power supply line of the motor. The connection between diodes D3 and D4 is grounded. There are 3 neon lamps with a withstand voltage of 380V that will lig...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a motor open-phase display protection device which can perform open-phase protection to a motor. A three-phase wire of a three-phase four-wire power supply circuit of the motor is connected with a motor open-phase display protection circuit, the motor open-phase display protection circuit comprises two parallel circuits, wherein in the first parallel circuit, a resistor R is in parallel connection with a capacitor C after being connected with a DC relay ZJ in series, and the second parallel circuit is connected with the first parallel circuit in series and formed by connecting diodes D1, D2 and diodes D3, D4 in parallel; the diode D1 is connected with the diode D2 in series, and the diode D3 is connected with the diode D4 in series; an end between the diode D1 and the diode D2 is the input end of the whole motor open-phase display protection circuit and is connected with the three-phase wire of the three-phase four-wire power supply circuit of the motor; and the middle of the diode D3 and the diode D4 is grounded. The invention has the advantages of low cost, very sensitive control and good effect, and can perform open-phase protection to various AC motors.

Description

Technical field: [0001] The invention relates to a motor phase loss display protection device capable of carrying out phase loss protection for a motor. Background technique: [0002] Through investigation, it is found that the main reason for burning out the motor is due to lack of phase, which can account for more than 90%. At present, the main motor of some equipment has such as figure 1 The traditional phase loss protection device shown in the figure requires 3 AC contactors, which takes up a large space in the electrical box and is expensive. When the motor is running normally, the coils of the 3 contactors are in the energized state. After a long time, the contactor If the contacts are oxidized, there will be oxidation problems, and if the contactor is replaced, the cost will increase. If there are problems such as adhesion after the contacts are oxidized, then the device will fail. Invention content: [0003] The purpose of the present invention is to overcome the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/09H02H3/04
Inventor 赵新卫
Owner XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER