Low-voltage motor restarting device

A low-voltage motor, restarting technology, applied in the direction of motor generator/starter, motor starter, etc., can solve the problems of unsuitable management, high cost, poor efficiency, etc., to achieve perfect electrical and safety isolation, easy equipment maintenance , the effect of convenient function throwing and withdrawing

Inactive Publication Date: 2011-11-09
SHANGHAI HUAJIAN ELECTRICAL EQUIP
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  • Abstract
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Problems solved by technology

[0003] In order to overcome the shortcomings of the existing restarting device, such as complex configuration of peripheral components, poor efficiency, high cost, un

Method used

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Embodiment Construction

[0015] The present invention is further described below in conjunction with accompanying drawing:

[0016] See attached figure 1 , the connection of the low-voltage motor restart device is to use the power supply unit (1) and the main CPU control unit (2), display unit (3), input unit (4), output unit (5), analog unit (6) direct connection. The main CPU control unit (2), the display unit (3), the input unit (4), the output unit (5), and the analog unit (6) communicate through the CAN bus according to a certain protocol.

[0017] See attached figure 1 , in the low-voltage system of 380V (690V) and below, for the continuous operation of the motor circuit, when the system loses power for a short time, in order to restore the process as soon as possible, the motor needs to be able to restart automatically when the power is restored, the three-phase voltage and current Connect to the analog unit (6), convert it into a voltage signal within the AD sampling range, and upload the d...

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Abstract

The invention discloses a low-voltage motor restarting device, which comprises a master central processing unit (CPU) control unit, a power unit, analogue quantity units, input units, output units and a display unit. Each unit adopts a modular design and independent detection and control ways. The power unit is connected with the other units, and supplies working power to the other units. A low-voltage motor restarting function and data transmission among the master CPU control unit, the analogue quantity units, the input units, the output units and the display unit are realized by a controller area network (CAN) bus. The device has the characteristics of high reliability, high real-time performance, wide application range, low cost and flexibility and convenience of operation and maintenance.

Description

technical field [0001] The invention integrates real-time measurement, intelligent control, and field bus communication, and is a device capable of automatically restarting batches of low-voltage motors in the event of "power shaking" or short-term power failure in industrial production. It belongs to the technical field of electric power system intelligent control. Background technique [0002] Most of the existing low-voltage motor restart devices use various protection and auxiliary relays, various electric meters and signal lamps configured in separate columns to realize the motor restart control function. Although such a structure can achieve the effect of motor restart, However, such a structure has huge costs, low system integration, and low efficiency. It cannot well meet the functional requirements of restarting a large number of motors. At the same time, it brings great inconvenience to modern equipment management and accident analysis. The degree of intelligence i...

Claims

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Application Information

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IPC IPC(8): H02P1/58
Inventor 王晓辉孙旭熹张峰王琦刘尧华
Owner SHANGHAI HUAJIAN ELECTRICAL EQUIP
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