A Compensated Motor Anti-Shaking System
An anti-shake and power supply technology, applied in the electrical field, can solve problems such as economic losses of enterprises, and achieve the effect of reducing operating losses, avoiding economic losses, and reducing hidden dangers of accidents.
Active Publication Date: 2019-04-12
合肥联信电源有限公司
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Problems solved by technology
Every time the unplanned downtime caused by power grid swaying and low-voltage trip of key motors will cause great economic losses to the enterprise, ranging from hundreds of thousands to millions
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[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0017] Such as figure 2 As shown, the present invention provides a compensating electric motor anti-shaking system, including a U-phase power supply, a V-phase power supply and a W-phase power supply of the grid, wherein the U-phase power supply and the V-phase power supply are the drive power supplies for the motor M, and the W-phase power supply For the input power of the control circuit.
[0018] The U-phase power supply and V-phase power supply are connected ...
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The invention discloses an anti-interference electricity system of a compensating motor. The anti-interference electricity system comprises a U-phase power supply, a V-phase power supply and a W-phase power supply of a power grid, wherein the U-phase power supply and the V-phase power supply are connected to a motor M through a thermal relay FR and normally open main contacts KM1 of a contactor; the W-phase power supply is connected to a control circuit; the control circuit comprises an anti-interference electricity device, a normally closed auxiliary contact FR1 of the thermal relay, a stop button SB2, a start button SB1 and a contactor coil KM which are connected with one another in series; and the start button SB1 is connected with a normally open auxiliary contact KM2 of the contactor in parallel. The anti-interference electricity device is connected to a motor control circuit, and the motor control circuit is provided with normal operation voltage when the power grid of the system generates interference electricity, so that normal work of the motor is ensured and relatively large economic losses are avoided. The anti-interference electricity device carries out voltage compensation in an undervoltage state, so that the operating loss is reduced; meanwhile, switching is not needed; and the hidden danger of an accident caused by a power supply switching problem is reduced.
Description
technical field [0001] The invention belongs to the technical field of electricity and relates to an anti-sway system, in particular to a compensation type anti-sway system for a motor. Background technique [0002] With the development of society, people's demand for electricity is becoming more and more obvious. Some industrial occasions rely more and more on electricity. Industrial process equipment, when short-circuit faults, induction motor startup, lightning strikes, and switch operations occur in the transmission and distribution system Voltage sags can be caused by events such as switching of inverters, inverters, and capacitor banks. Among them, short-circuit fault, induction motor start-up and lightning strike are the main causes of voltage sag. The flashover of the insulator or the discharge to the ground caused by the lightning strike will cause the protection device to operate, resulting in a sag of the supply voltage. This sag has a wide range of influence, a...
Claims
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IPC IPC(8): H02J9/00
CPCH02J9/005
Inventor 李多山刘晖
Owner 合肥联信电源有限公司