CN2652008Y

CN2652008Y - Idle in situ compensator of motor

Info

Publication number: CN2652008Y
Application number: CN 200320113060
Authority: CN
Inventors: 陈鹤
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-18
Filing date: 2003-10-18
Publication date: 2004-10-27
Anticipated expiration: 2013-10-18

Abstract

The utility model relates to a reactive in-situ compensator of a motor, particularly a motor reactive compensating device. The utility model is characterized by comprising three discharge circuits which are respectively composed of a resistor and an indicating lamp, are respectively connected with three compensation capacitors of the motor in parallel, and are controlled by a multi-contact switch K. With the device connected between the motor and a power source, when the motor is powered on, the compensation capacitors and the motor are powered on simultaneously. When the motor is powered off, the compensation capacitors quit from a power network, while the compensation capacitors and the motor are disconnected simultaneously, so the compensation capacitors can not discharge electricity to the motor. Thus, when the full load power factor is compensated to 1, the utility model switches off the power so as to protect the motor and the compensation capacitors effectively. Therefore, the utility model can effectively reduce the loss of power resource in transmission lines, save resources and raise the efficiency of electrical supply equipment in the maximum extent.

Description

The Electrometer's Unactive device

One, technical field

The utility model is a kind of motor reactive power compensator.

Two, background technology

At present motor on the spot reactive power compensation be that capacitor is directly in parallel with motor, so the power factor compensation to 1 can only be the motor zero load time.But load or burden without work minimum during because of zero load, the compensation back still for postpone, does not reach compensation effect preferably at full load power of electric motor factor.As the full-load power factor is compensated to 1, just be bound to become leading when zero load or underloading, in the transient process after cutting off the electricity supply like this, motor and capacitor still are in the closed circuit, because the discharge of capacitor, voltage can exceed many times of power supplys in the closed circuit, can cause damage to motor and capacitor like this.

Three, summary of the invention

The utility model is for effectively reducing motor loss in the circuit under idle function situation, improving the efficient of power supply unit.

This device includes three groups of discharge circuits of being made up of same resistance and indicator light, respectively with motor in three building-out capacitors and connect, three groups of discharge circuits and three building-out capacitors are by the break-make of the control of multiconductor control switch and power supply and motor.

Inserting such device between motor and power supply can be at motor connecting power the time, building-out capacitor and motor be energized simultaneously, and during powered-down, building-out capacitor withdraws from from electrical network simultaneously, building-out capacitor and motor disconnect simultaneously, and building-out capacitor can't discharge to motor.Cut off the electricity supply the full-load power factor being compensated under 1 the state, effectively protect motor and building-out capacitor.Can effectively reduce the loss of electric power resource in transmission line like this, economize on resources, farthest improve the efficient of power supply unit.

Four, description of drawings

Accompanying drawing is the circuit diagram of this device, is this device circuit structure chart in the square frame.

Five, embodiment

The utility model is assemblied in the housing G of a high insulation, as mould in the shell, a multicontact switch K is housed, one end external power supply, other is termination motor W, three building-out capacitor C respectively and on the K switch contact, on every group of building-out capacitor C respectively and be connected to the discharge circuit of forming by identical indicator light D and resistance R.Building-out capacitor C is identical with the capacity of original motor configuration, and indicator light is high pressure resistant indicator light, and the resistance R resistance is not less than the resistance of 100K Ω.

Claims

The Electrometer's Unactive device relates to the motor reactive power compensator, it is characterized in that: it includes three groups of discharge circuits of being made up of same resistance R and indicator light D, respectively with three building-out capacitor C of motor W and connect, three groups of discharge circuits and three building-out capacitor C are by the break-make of multicontact switch K control and power supply and motor.