CN2281601Y - Multifunctional automatic motor burnout protector - Google Patents

Abstract

The utility model relates to a multifunction full automatic motor burnout protector, which can carry out comprehensive protection for the motor. An automatic manual transfer switch HK and a transformer B are connected to an alternating current contactor JC of a power supply. Each temperature sensor CL is sticky on each phase stator winding in a motor D and is series connection with a switch. The sublevel of the transformer B is connected with an N-shaped filter circuit through a bridge type rectifier ZL. The filter circuit is connected with an NE555 type integrated block G, a resistor (R<3>, R<2>), a capacitor C<3> and two branches of a resistor R<4> and a relay J. A foot 3 of the integrated block G is connected with a loudspeaker through a capacitor C<4> to form an alarm circuit. When the compressor takes place a failure and the temperature of the stator winding rises, a sensor is broken to protect the processor and to alarm.

Description

The unburned protector of multi-functional full-automatic motor

The utility model relates to the protector of motor, belongs to the unburned protector of multi-functional full-automatic motor.

Motor is a power-equipment, and various faults often take place in the long-term operation process, even motor burnt and cause fire, thereby people are paid attention to the protection of motor.At present, what have is equipped with overload protection, open-phase protection and overcurrent protector on motor, but the performance of these protectors is single, does not reach the purpose of protection fully.These protector majorities are contained in outside the machine simultaneously, and are fragile in transportation and installation process, disturbed in the work.

The purpose of this utility model is to avoid the deficiency in the above-mentioned present technology, and provides a kind of multi-functional full-automatic motor unburned protector.

The purpose of this utility model can reach by the following technical programs: the most faults that take place because of motor at first make stator winding temperature raise, again according to the characteristics of temperature sensor, as it is connected in the circuit, it under the normal condition conductor in the circuit, when temperature is elevated to design temperature and disconnect, can be considered temperature switch.Thus, A.C. contactor at first connects and meets transformer B on automatic and hand-operated chargeover switch HK and the power circuit in the power control of motor, be stained with temperature sensor on every phase stator winding in the motor then, sticking 3 of threephase motor is being connected on the automatic and manual contact of automatic and hand-operated chargeover switch after each temperature sensor series connection.On transformer secondary, meet the normally opened contact JC of A.C. contactor JC ₅Connect π type filter circuit and NE555 type integrated package through bridge rectifier, series resistance (R between the pin (8,1) of integrated package ₃, R ₂), capacitor C ₃With relay, resistance R ₄Two loops; Wherein the pin of integrated package (2,6) is connected to resistance R ₂With capacitor C ₃Between, pin 7 is connected between the resistance (2,3), and pin 4 is connected to resistance R ₄And on the circuit between the relay J, pin 3 is through capacitor C ₄Be connected to loudspeaker (loud speaker).Be connected to guard lamp on transformer B secondary, relay indicating light respectively has the contact of A.C. contactor on the circuit of two lamps, more than form this protector and can finish the design's purpose.

Can on actuating coil and operating coils, each glue a temperature sensor for above-mentioned single-phase motor.

The utility model is compared with above-mentioned present technology can have following advantage: when overload, overcurrent, phase shortage appear in motor in operation process and stator winding temperature is raise; temperature sensor when exceeding design temperature and disconnecting; motor shuts down; motor is protected; be provided with alarm lamp and loud speaker simultaneously; the staff can in time fix a breakdown, and recovers running rapidly.

Accompanying drawing is this protector fundamental diagram.

Below in conjunction with accompanying drawing will the utility model is described in further detail:

Shown in accompanying drawing, three phase mains (X ₁, X ₂, X ₃) respectively be connected to fuse protection device RD through inlet wire (D ₁, D ₂, D ₃) insert threephase motor D, at power supply (X ₂, X ₃) power control is housed on mutually.A.C. contactor JC is arranged in the power control, stop button TA and starting button QA are arranged, on the A.C. contactor JC at inlet wire (D ₁, D ₂, D ₃) the contact JC of A.C. contactor JC respectively is housed ₁The utility model is to meet automatic and hand-operated chargeover switch HK on the A.C. contactor JC and meet transformer B in power control on power circuit; Be stained with temperature sensor CL on every phase stator winding in the motor D, threephase motor has three groups of stator winding, being connected on the automatic and manual contact (1,2) of automatic and hand-operated chargeover switch HK after each temperature sensor CL series connection.Decide the highest (bearing) temperature of temperature sensor by power of electric motor; the normal condition lower sensor is that temperature raises and reaches when bearing (specified) temperature when making the stator winding fever for a certain reason for the part of circuit in the power control of motor; transducer disconnects; promptly disconnected the power supply of motor, motor is protected.On above-mentioned transformer B secondary through the normally opened contact JC of A.C. contactor JC ₅Through bridge rectifier ZL (D ₁～D ₄) meet π type filter circuit (C ₁, R ₁, C ₂), meet the resistance (R of series connection between the both positive and negative polarity of filter circuit ₃, R ₂), electric capacity (C ₃) branch road, NE555 type integrated package branch road and be connected resistance R ₄, the loop that forms of relay J; Wherein the pin (2,6) of NE555 type integrated package G is connected to resistance R ₂With capacitor C ₃Between, pin 7 is connected between the resistance (2,3), and pin 4 is connected to resistance R ₄And between the relay J, pin 3 is through capacitor C ₄Insert on the loudspeaker (loud speaker).In addition, on transformer B secondary, be connected to guard lamp ZD ₁With relay indicating light ZD ₂, two lamps respectively are connected to the contact (JC of A.C. contactor ₃, JC ₄).

Above-mentioned to single-phase motor can be on actuating coil and operating coils each sticking temperature sensor CL.

Because temperature sensor CL is connected on the A.C. contactor JC through automatic and hand-operated chargeover switch HK, stator winding temperature is raise when exceeding detected temperatures, open the contact of transducer CL, has cut off the power supply on the contactor JC; Also cut off the power supply of motor simultaneously and make its stall, motor is protected.During the motor proper motion, relay indicating light ZD ₂Shinny, illustrate that motor operation is normal.When the power supply of the contactor JC that breaks down disconnects, contact (JC ₄, JC ₅) connect protection indicator light ZD ₁Shinny, illustrate that motor breaks down; Circuit on B level of this while transformer is through contact JC ₅Connect, make the relay J adhesive, amplify oscillating current through integrated package G and can make loud speaker Y produce alarm signal, can notify the staff to overhaul.

Claims (2)

1, the unburned protector of a kind of multi-functional full-automatic motor has the control device of motor (D) and power supply, and A.C. contactor (JC) and stop button (TA) thereof, starting button (QA) are arranged in the control device, it is characterized in that:

A) in power control, connect on the A.C. contactor (JC) and connect transformer (B) on automatic and hand-operated chargeover switch (HK) and the power circuit;

B) on the every phase stator winding in motor (D) lining, be stained with temperature sensor (CL), the automatic and manual contact that is connected on automatic and hand-operated chargeover switch (HK) after each temperature sensor (CL) series connection.On (1,2);

C) handing over the normally opened contact (JC that connects A.C. contactor (JC) on depressor (B) secondary ₅) meet π type filter circuit (C through bridge rectifier (ZL) ₁, R ₁C ₂) and NE555 type integrated package (G);

D) series resistance (R between the pin (8,1) of NE555 type integrated package (G) ₃, R ₂), electric capacity (C ₃) and resistance (R ₄), two loops of relay (J); Wherein the pin (2,6) of integrated package (G) is connected to resistance (R ₂) and electric capacity (G) between, pin (7) is connected between the resistance (2,3), pin (4) is connected to resistance (R ₄) and relay (J) between, pin (3) is through electric capacity (C ₄) be connected to loudspeaker (Y);

E) on transformer (B) secondary, be connected to guard lamp (ZD ₁), relay indicating light (ZD ₂), two lamps respectively are connected to the contact of A.C. contactor.

2, protector according to claim 1 is characterized in that: for single-phase motor at each sticking temperature sensor (CL) of actuating coil and operating coils.

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