CN2395455Y

CN2395455Y - Automatic starting relay for motor instantaneous power-off

Info

Publication number: CN2395455Y
Application number: CN 99232430
Authority: CN
Inventors: 叶体平
Original assignee: Chuandong Natural Gas Purification General Plant Sichuan Petroleum Administrati
Current assignee: Chuandong Natural Gas Purification General Plant Sichuan Petroleum Administrati
Priority date: 1999-08-25
Filing date: 1999-08-25
Publication date: 2000-09-06
Anticipated expiration: 2009-08-25

Abstract

The utility model relates to an automatic start relay for a motor in the instantaneous power-off state, which is used for a motor control loop and belongs to the technical field of electrically automatic control technology. The utility model has the structure that the automatic start relay for a motor composed of a capacitor, a relay, a resistor, a diode and a decompression coil are added on a conventional motor control circuit; accordingly, the problem that after the motor is in the instantaneous power-off state, the motor can not be automatically started under the condition that the power is suddenly on because of the disconnection of a switch button is solved. The utility model uses the characteristic that the capacitor can store small quantity of electric power, and the power can be supplied to the relay when the power is instantly off; the phenomenon that the motor can be automatically started through low current after the power is on after the instantaneous power-off, and lost working environment can be reduced.

Description

Motor instantaneous power failure self-starting relay

A kind of motor instantaneous power failure self-starting relay is used for the Motor Control loop, belongs to technical field of electrical automatic control.

In the prior art, what all adopt on Motor Control is conventional circuit for controlling motor, it has comprised an A.C. contactor, shift knob, air switch and thermal relay, starter motor need manually be pressed shift knob, and motor could turn round, and often runs into the situation of thunderbolt or switching power supply and reclosing but be in operation, when these problems occurring, tend to cause user's instantaneous power failure, this power failure often was no more than for 2 seconds, but owing to have a power failure, the contactor of former adhesive just disconnects immediately, so even come electricity immediately again, motor can not work on yet, at this moment factory's continuous productive process, boiler, the colliery, the problem that can not return to normal production for a long time can be caused in chemical plant etc.

The purpose of this utility model is must press the problem that the shift knob motor just can work on again after will solving power failure, designs a kind of at the instantaneous power failure device of rear motor with self-starting of sending a telegram here again.

The utility model is to realize like this, on conventional circuit for controlling motor, increase by one by electric capacity, relay and resistance, diminishing coil, the motor self-starting relay that diode constitutes, utilize electric capacity can store the characteristic of small amount of electrical energy, when instantaneous power failure, power to relay by electric capacity, the loop of a connection is provided for the conventional circuit for controlling motor that has disconnected because of having a power failure, so just can make when sending a telegram here again behind the instantaneous power failure, make electric power restart contactor, and motor is remained in operation by the loop that provides.The utility model has the advantages that, utilized electric capacity can store the characteristics of small amount of electrical energy, to the relay power supply, so that keep the loop of a connection, no matter which kind of instantaneous power failure can restart the motor that also turns round behind the incoming call voluntarily under effect of inertia.

Fig. 1 is a self-starting relay circuit connection layout in the utility model.

Fig. 2 is a device connection diagram of the present utility model.

Fig. 3 is a self-starting relay pin distribution map in the utility model.

Is example below in conjunction with accompanying drawing to have a power failure 2 seconds, provide embodiment of the present utility model, the utility model is by A.C. contactor 1, shift knob 3, air switch 2 and self-starting relay 4 and self-starting relay socket 5 constitute, self-starting relay 4 has 4 pin a, b, c, d, with an alignment pin 6, self-starting relay socket 5 has 4 jack a1, b1, c1, d1,4 jacks link to each other with shift knob 3 with A.C. contactor 1 respectively, wherein jack a1 links to each other with shift knob 3, b1 links to each other with air switch 2 with shift knob 3, jack c1 links to each other with shift knob 3 with A.C. contactor 1, jack d1 links to each other with A.C. contactor 1, and self-starting relay 4 comprises electric capacity c, resistance R, contact J1, J2 and diode D, diminishing coil L, an end of capacitor C links to each other with resistance R, one end links to each other with contact J2, the other end of resistance R links to each other with diminishing coil L with relay J and through diode D, and the other end of relay J divides two-way, and the contact J1 of leading up to links to each other with shift knob 3, another road directly links to each other with shift knob 3, the end of contact J2 links to each other with capacitor C, and the other end links to each other with shift knob 3 with A.C. contactor 1, and the other end of diminishing coil L links to each other with A.C. contactor 1 through a protective tube RD, self-starting relay 4 is inserted in the jack of the self-starting relay socket 5 that has connected, during instantaneous power failure, capacitor C is by contact J2, and TA and resistance R are powered to relay J, make contact J1 closure, so when sending a telegram here suddenly, just can motor be restarted by contact J1 to A.C. contactor CJ power supply.

Claims

1. motor instantaneous power failure self-starting relay, by A.C. contactor, shift knob, air switch and the self-starting relay formation that links is characterized in that: described self-starting relay comprise a self-starting relay that four pins and an alignment pin arranged and four jack respectively with A.C. contactor and the joining self-starting relay socket of shift knob.

2. motor instantaneous power failure self-starting relay according to claim 1, it is characterized in that: described self-starting relay comprises a capacitor C, a resistance R, contact J1, J2 and, diminishing coil L, diode D, wherein, an end and the resistance R of capacitor C link, and an end and contact J2 link, the other end of resistance R and relay J and diode D link, and link to each other with diminishing coil L by diode D, the other end of relay J divides two-way, leads up to contact J1 and shift knob to link, another road directly and shift knob link, an end and the capacitor C of contact J2 link, and the other end and A.C. contactor and shift knob link, and the other end of diminishing coil L links by a protective tube RD and A.C. contactor.