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

Method and control device for switching contactor

A control device and contactor technology, applied in relays, electromagnetic relays, electromagnetic relay details, etc., can solve problems such as unevenness, reduced thickness of contact materials, and different degrees of corrosion of main contacts, and achieves lower product costs, The effect of increasing the service life

Active Publication Date: 2021-03-12
ABB (SCHWEIZ) AG
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the thickness of the contact material of the most affected main contacts may decrease faster
This leads to different degrees of corrosion on the different main contacts, i.e. non-uniform
Therefore, the service life of the contactor is limited by which main contact fails first

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
  • Method and control device for switching contactor
  • Method and control device for switching contactor
  • Method and control device for switching contactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025]In the following description, specific details, such as specific architecture, interfaces, technologies, etc. are set forth in the following description, such as specific architectures, interfaces, technologies, etc. to provide a thorough understanding. In other cases, a detailed description of the well-known devices, circuits, and methods is omitted to avoid unnecessary details. In the entire specification, the same reference numerals refer to the same or similar elements.

[0026]figure 1 A contactor 1 and a control device 20 for switching contactor 1 are shown in accordance with an embodiment of the present invention. The contactor 1 is a low voltage contactor and is used to connect and disconnect the electrical load 2. For example, the electrical load 2 can be an electric motor, but it should be noted that the electrical load 2 can be any type. The electrical load 2 is connected to a main grid having a phase or more phase. In a particular illustrated, the main grid has three-...

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

A method (30) for switching a contactor (1) is provided. The method (30) is carried out by the control device (20), which controls the control voltage supplied to the coil (10) of the contactor (1), wherein the coil (10) is energized and de-energized to control the contact switching of device (1). The method (30) comprises obtaining a delay time ΔT from a predefined set of N values, wherein the obtained delay time ΔT is different from a previously selected delay time ΔT, determining (31) a reference time point t1 based on the obtained delay time ΔT, wherein Setting the starting point t0 of the delay time ΔT with respect to the initiation of the method (30), estimating (32) the half-period Tp of the control voltage, determining (33) the duration of the measurement interval Tm based on the estimated half-period Tp of the control voltage, based on setting (34) the start point of the first measurement interval Tm with reference to the time point t1, and setting the start point of the subsequent measurement interval equal to the end point of the immediately preceding measurement interval, acquired (35) during the duration of the measurement interval Tm The measurement of the control voltage is performed and the contactor (1) is switched (36) based on the measurement taken during the measurement interval Tm. Also provided are a control device (20), a computer program (23) and a computer program product (22).

Description

Technical field[0001]The techniques disclosed herein generally relate to the field of contactors used in power networks, and particularly to methods for switching contactors for controlling contactors, computer programs, and computer program products.Background technique[0002]The contactor is an electronically controlled switching device for switching the electrical load connected to the circuit. For example, the electric charge can be a three-phase load. For connection / disconnecting, the contactor includes a contact unit, and the contact unit further comprises a plurality of main contacts, such as three main contacts. The main contact is configured such as connecting the electrical load to the main grid or disconnecting from the main grid. The contactor further includes an actuation unit, and the actuation unit includes a coil for actuating the main contact. The electronic control circuit of the contactor is used to control the voltage supplied to the coil. Typically, the control...

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 Patents(China)
IPC IPC(8): H01H47/18H01H50/86H01H9/56
CPCH01H9/56H01H47/18H01H50/86H01H2009/566
Inventor G·约翰森A·维什努
Owner ABB (SCHWEIZ) AG