CN2249984Y

CN2249984Y - Integrated multifunctional self-protecting electric motor

Info

Publication number: CN2249984Y
Application number: CN 95221299
Authority: CN
Inventors: 高志良; 金兆勋
Original assignee: PINGQUAN ELECTRICAL MACHINERY FACTORY
Current assignee: PINGQUAN ELECTRICAL MACHINERY FACTORY
Priority date: 1994-09-01
Filing date: 1995-08-25
Publication date: 1997-03-19
Anticipated expiration: 2005-08-25

Abstract

The utility model relates to an integrated multifunctional self-protecting electric motor, comprising a protector which is installed in the electric motor terminal box. The utility model is characterized in that the protector is also composed of an open-phase protector, a temperature controller, a current leakage controller and a photoelectric controller; when the fault such as phase loss, overvoltage, undervoltage, overload and superheat and current leakage are generated in the operating process of the electric motor, the protector automatically cuts off power supply. No external contactor is needed to be connected by using the integrated multifunctional self-protecting electric motor which can be frequently started.

Description

Integrated multi-functional self-shield motor

The utility model relates to a kind of motor, especially a kind of integrated multi-functional self-shield motor.

The present unprotect device of motor that uses own often because of the phase failure, overvoltage, under-voltage, overload, the overheated motor windings of burning, or because of body leakage jeopardizes people and animals, causes enormous economic loss and social danger.

And present protective device also is independently, is not contained in the motor, uses devices such as A.C. contactor, air switch, thermal relay more, and volume is big, cost is high, take material, and unsuitable Fraquent start easily burns contact, and action is unstable, and inconvenient maintenance.

The purpose of this utility model is to provide a kind of integrated multi-functional self-shield motor, and it solves shortcomings such as the complete and excessive cost height of volume of defencive function when front motor with the characteristics of its protector and motor integration.

The purpose of this utility model is achieved in that a kind of integrated multi-functional self-shield motor, it comprises master control power supply, motor, connection box for motor, is installed in the protector in the connection box for motor, it is characterized in that, described protector is made of phase failure protector, temperature controller, photoelectric controller, earth leakage protective device, and wherein: the three phase terminals a of phase failure protector, b, c join with binding post A ', B ', C ' three ends of motor power respectively; The simple end of the thermoswitch one end of temperature controller and the variator T of master control power supply joins, the other end joins through an end of the controllable silicon SCR 3 of shutdown, the start break of switch and phase failure protector respectively; The resistance R 1 of photoelectric protector, the common port of R2, R3 and master control power supply+5 volts of ends join, and the A of photoelectric controller, B, C the three-phase common port of photoelectricity integrated package MOC3063 and the electrochemical capacitor negative pole end of master control power supply separately join; Pin 1 end of the integrated package 7805 of its anode tap of the controllable silicon of earth leakage protective device and master control power supply joins, pin 2 ends of its cathode terminal and integrated package 7805 join.By the work that cooperatively interacts of each protector on the protector that is contained in the connection box for motor, the automatic cut-off motor power supply is realized the purpose of protection motor when fault such as phase shortage, superpressure, under-voltage, overload, overheated, electric leakage occurring when motor.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is a connection box for motor backplane wiring post schematic diagram of the present utility model;

Fig. 2 is the side sectional view of connection box for motor of the present utility model;

Fig. 3 is the fundamental diagram that is installed in the protector in the terminal box.

Wherein, the frame of broken lines among Fig. 3 is respectively:

1.-phase failure protector; 2.-temperature controller; 3.-photoelectric controller; 4.-earth leakage protective device.

By Fig. 1,2,3, it comprises the utility model master control power supply, motor, connection box for motor, is installed in the protector in the connection box for motor, it is characterized in that, described protector is made of phase failure protector, temperature controller, photoelectric controller, earth leakage protective device, and wherein: the three phase terminals a of phase failure protector, b, c join with binding post A ', B ', C ' three ends of motor power respectively; The simple end of the thermoswitch one end of temperature controller and the variator T of master control power supply joins, the other end joins through an end of the controllable silicon SCR 3 of shutdown, the start break of switch and phase failure protector respectively; The resistance R 1 of photoelectric protector, the common port of R2, R3 and master control power supply+5 volts of ends join, and the A of photoelectric controller, B, C the three-phase common port of photoelectricity integrated package MOC3063 and the electrochemical capacitor negative pole end of master control power supply separately join; Pin 1 end of the integrated package 7805 of its anode tap of the controllable silicon of earth leakage protective device and master control power supply joins, pin 2 ends of its cathode terminal and integrated package 7805 join.

In Fig. 1,2,1 among Fig. 1 is terminal box, and 2 among Fig. 2 is protector, and A ', B ', C ' are the motor power binding post, and e is the common port of starting stop button, and f is the starting button other end, and g is the stop button other end.

Start: in Fig. 3, A, B, C are three groups of power supplys, K is a switch, RH1, RH2, RH3 are fuse, and it is elementary to master control power transformer T to draw 380 ± 20V mutually by A, and (hand is pressed and do not decontroled to the movable contact of starting shooting to the shutdown break (connections) of external shift knob through temperature controller thermoswitch control conducting, connect) connection C phase, constitute 380V ± 20V path, making master control transformer T get electric is the master control power connection, and the T transformer becomes interchange low-voltage 6.3V * 2.Through the R11 protective resistance; 1A/1000V bridge drag flow device, output DC is through C1 filtering; R10 filter discharge resistance; one the tunnel supplies 4. DC power supply of earth leakage protective device, another road 7805 integrated packages, and the C2 filtering voltage regulation goes out+the 5V direct current; supply with 3. power supply of photoelectric controller; when+5V power supply, photoelectric controller 3. electric, control the conducting of powerful TRIAC41A700B thyristor.Connect motor 380 ± 20V power supply, motor rotation.Each must have electric current mutually through phase failure protector three magnetic ring coil of TA, TB, TC 1. the ACB three-phase, utilizes electromagnetic induction principle, and the inferior utmost point induces about 0.6-1.2V voltage, controls three controllable silicon SCR 1, SCR2, SCR3 and makes its conducting.

Self-insurance: it is elementary to master control power transformer T to draw 380 ± 20V mutually by A, through temperature controller 2. thermoswitch control conducting to the shutdown break (connections) of external switching on and shutting down button to the break of starting shooting (hand is decontroled and disconnected) but since when starting shooting motor 1. phase failure protector has been controlled three controllable silicon SCR 1, SCR2S, SCR3 conducting in the running.The start movable contact that has replaced the switching on and shutting down buttons is to the C phase; same formation 380 ± 20V path; master control transformer T is got; be the master control power supply still electric, dc power supply, a kind of earth leakage protective of giving; another kind makes 3. conducting of photoelectric controller; connect motor 380 ± 20V power supply, motor remains in operation, and has reached the order ground of self-shield running.

Shutdown: the shutdown button (movable contact disconnection) that hand is pressed external switching on and shutting down button disconnects master control power supply A, C phase path, master control power supply dead electricity, and no direct current output, motor shuts down.A, B, C three-phase no current, phase failure protector three controllable silicon SCR 1, SCR2, SCR3 1. close.

In Fig. 3; the phase failure principle of this circuit is: zero load and full load; AB, the arbitrary outage mutually of C three-phase; protector is cut off the electricity supply automatically; the motor stall; operating principle: when motor ran well, each had alternating current mutually three phase mains, utilized the electromagnetic induction principle secondary induction to go out three series connection of about 0.6V-1.2V voltage control may command SCR1, SCR2, SCR3 conducting by phase failure protector three magnetic ring coil Ta, Tb, Tc 1..Motor runs well.Magnet ring TA, TB, TC coil have a peculiar property, and promptly the secondary electrical pressure energy remains between the 0.6V-1.2V variation when elementary electric current 2A to 50A changes, and voltage stabilizing character is promptly arranged.Guaranteed that SCR control is reliable and stable.When one cuts off the power supply mutually; this phase no current, this phase magnet ring secondary coil do not have voltage output, and this phase SCR controllable silicon is closed; master control power supply 380 ± 20V outage; no direct current output, motor shuts down, and phase failure protector three controllable silicon SCR 1, SCR2, SCR3 1. close; this is sent a telegram here mutually again; motor can not turn round, and must press external start button again, and motor could turn round.

In like manner, its temperature control principle is: 2. temperature controller is made up of two thermoswitches, promptly is placed between A and B winding one, between B and C winding one, two thermoswitches series connection are not when just often the coil windings temperature surpasses 120 ± 5 ℃, the thermoswitch conducting, the master control power supply gets electric, motor rotation, when motor be subjected to overburden, overvoltage, when the machine winding coil temperature rises to 120 ± 5 ℃ when under-voltage, overheated, thermoswitch cuts out, the master control power cut-off, no direct current output, motor shuts down.

In like manner; its electric leakage principle is: earth leakage protective device is 4. by magnet ring TD controllable silicon BT169; control master control power supply low-tension supply is formed; when motor housing leaks electricity; the protector operating current is 28mA＜30mA; 0.5 second action, promptly when motor housing leaked electricity, TD magnetic ring coil main winding connect motor housing extremely greatly; constitute path; when secondary winding induces about 0.6V voltage, make controllable silicon BT169 conducting, short circuit master control power supply; the low-pressure side power supply; make master control power supply VD be reduced to 2V, 3. photoelectric controller all cuts out because of low three thyristors of TRIAC of voltage, and motor shuts down; phase failure protector is three controllable silicon SCR 1 1.; SCR2; SCR3 closes; master control power supply dead electricity, motor can not rerun, and has guaranteed personal safety.

In like manner, its photoelectric controller principle is: 3. photoelectric controller adds protector by electronic original part photoelectricity integrated package thyristor and forms.When DC power supply, through R1, R2, R3 dropping resistor, three photoelectricity integrated packages, the MOC3063 action, operating current is 5-10mA, through R4, R5, R6, R7, R8, R9, three thyristor conductings of controlling resistance control TRIAC, a-a ', b-b ', c-c ' connection motor power, motor rotates.When disconnecting DC power supply, three photoelectric controllers are dead electricity 3., and three photoelectricity integrated packages are failure to actuate, and three TRIAC thyristors are closed, and the motor stall for guaranteeing thyristor safety, adds C3, C4, C5, R12, R13, R14, resistance-capacitance protection device.

The utility model is compared with protector with existing motor, and volume is little, heavy Amount is light, and is easy to use by filling, and must not connect contactor again, and defencive function is complete, Stable performance is active in one's movements, but Fraquent start does not produce arc light, uses the longevity Close length, be difficult for burning, can save a large amount of copper silver nonferrous materials, and can protect Protect the person poultry safety.

Claims

1, a kind of integrated multi-functional self-shield motor, it comprises master control power supply, motor, connection box for motor, is installed in the protector in the connection box for motor, it is characterized in that, described protector is made of phase failure protector, temperature controller, photoelectric controller, earth leakage protective device, and wherein: the three phase terminals a of phase failure protector, b, c join with binding post A ', B ', C ' three ends of motor power respectively; The simple end of the thermoswitch one end of temperature controller and the variator T of master control power supply joins, the other end joins through an end of the controllable silicon SCR 3 of shutdown, the start break of switch and phase failure protector respectively; The resistance R 1 of photoelectric protector, the common port of R2, R3 and master control power supply+5 volts of ends join, and the A of photoelectric controller, B, C the three-phase common port of photoelectricity integrated package MOC3063 and the electrochemical capacitor negative pole end of master control power supply separately join; Pin 1 end of the integrated package 7805 of its anode tap of the controllable silicon of earth leakage protective device and master control power supply joins, pin 2 ends of its cathode terminal and integrated package 7805 join.