CN2473809Y

CN2473809Y - Energy saver for motor

Info

Publication number: CN2473809Y
Application number: CN 01205970
Authority: CN
Inventors: 郭长信
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-02
Filing date: 2001-04-02
Publication date: 2002-01-23
Anticipated expiration: 2011-04-02

Abstract

The utility model relates to an energy saver for motor pertaining to motor economical operation controlling technology, which comprises a motor contactor, a controller K and wiring terminals 1, 2, 3, 4. The motor contactor consists of a main circuit contactor MK for motor M, an angle-connected operation contactor Delta K, a star-connected operation contactor YK. In the state of no-load or light-load, the motor is automatically transferred to star-connected wire operation form angle-connected to save energy via the operation contactor K. Thus, the utility model is suitable for the motor which is always keeping the state of no-load or light-load, such as lathes, punches, belt conveyers, oil-field suction machines, cranes and crushers etc.

Description

Motor energy saver

The utility model belongs to the motor economic operation control technology, particularly a kind of motor energy saver.

At present, in electric drive, many motor often run on zero load or light condition, as lathe, punch press, belt conveyer, oil-field oil pumper, crane and disintegrating machine etc.And these motor all exist the energy waste phenomenon in running.

The purpose of this utility model provides a kind of employing motor angle-star-corner connection line automatic conversion technology, makes motor transfer star wiring operation in zero load or light running state automatically to by the corner connection line, reaches the motor energy saver on economize on electricity order ground.

The utility model motor energy saver comprises motor contactor and controller K and binding post, it is characterized in that: the motor contactor is by motor M main circuit contact device MK, corner connection operation contactor △ K, star meet operation contactor YK and form, the binding post of controller K is 1,2,3,4, motor M main circuit contact device MK coil, corner connection operation contactor △ K coil, star connects operation contactor YK coil and controller K binding post 1, connects power supply A phase; Coil MK one end links to each other with starting button QA, contactor MK normally opened contact with controller K binding post 3; The other end of starting button QA and the normally opened contact of contactor MK and connect the back be connected power supply B phase by stop button TA; The other end of the △ K coil of corner connection operation contact, the normally-closed contact that meets operation contactor YK by star links to each other with controller K binding post 4, constitute corner connection operation circuit, the other end that star connects operation contactor YK coil links to each other with controller K binding post 2 by corner connection operation contactor △ K normally-closed contact, constitutes star and connects the operation circuit.Current transformer L in the controller K ₁, L ₂, L ₃One end connects diode D respectively ₁, D ₂, D ₃Negative pole, D ₁, D ₂, D ₃Anodal and connect the back and connect capacitor C ₁Negative pole and potentiometer RW, the other end of potentiometer RW and triode V1 base stage and resistance R ₁Link to each other triode V ₁Collector electrode and resistance R ₂With triode V ₂Base stage links to each other, triode V ₂Collector electrode by luminous tube D ₄Connect resistance R ₃And R ₄, resistance R ₄The other end and capacitor C ₂Positive pole and voltage-stabiliser tube D ₅Negative pole links to each other, voltage-stabiliser tube D ₅Positive pole connect triode V ₃Base stage, triode V ₃Collector electrode pass through resistance R ₅Connect resistance R ₆With triode V ₄Base stage, triode V ₄Collector electrode by relay J coil and voltage-stabiliser tube D ₆Anodal, triode V ₃Emitter, capacitor C ₂Negative pole, diode D ₇, D ₈Positive pole and resistance R ₂, R ₃Be connected diode D ₉, D ₁₀Negative pole and connect after pass through resistance R ₇With current transformer L ₁, L ₂, L ₃The other end, capacitor C ₁Positive pole, triode V ₁, V ₂, V ₄Emitter, voltage-stabiliser tube D ₆Negative pole and resistance R ₁, R ₆Be connected; Diode D ₈Negative pole, D ₁₀Positive pole and capacitor C ₃, resistance R ₈Connect capacitor C ₃, resistance R ₈The other end be connected with the binding post 1 of controller K.Diode D ₇Negative pole, D ₉The binding post 3 of often the opening of anodal, relay J, normally closed moving contact and controller K and connect after, more respectively by relay J often open fixed contact J-Y, be connected with the binding post 2 of controller K, constitute star wiring running control circuit.Be connected with the binding post 4 of controller K by the normally closed fixed contact J-△ of relay J, constitute corner connection line running control circuit.

The utility model is that following advantage is arranged compared with the prior art:

1, because the utility model takes angle-star-angle with the load automatic conversion technology, motor transfers star wiring operation automatically to when zero load or light running.This product reaches about 10-60% than traditional motor starter, switchgear economize on electricity.

2, the utility model is simple in structure, cost is low, volume is little, is convenient to advantages such as tissue production.

The utility model is provided by the following drawings and embodiment.

Fig. 1 is an electrical schematic diagram of the present utility model.

Fig. 2 is that winding diagram is installed in use of the present utility model.

Example of the present utility model is as shown in Figure 1: when clicking starting button QA, main circuit contact device MK coil, corner connection operation contactor △ K line chart immediately, motor M starting operation, the utility model is in running order, at this moment, motor M load current as greater than potentiometer RW set-point the time, triode V ₁Be in conducting state, triode V ₂, V ₃, V ₄All be in and end, relay J is failure to actuate, if the motor load electric current drops to potentiometer RW set-point when following, triode V ₁End immediately, simultaneously triode V ₂Resistance R is passed through in conducting ₄, capacitor C ₂With voltage-stabiliser tube D ₂The rc-delay circuit that constitutes makes triode V ₃, V ₄The time-delay conducting, the relay J action transfers star to by the corner connection operation and connects operation, if load current during once again greater than the RW set-point, recovers the corner connection operation again automatically.

Claims

1, a kind of motor energy saver comprises motor contactor and controller K and binding post, it is characterized in that:

A, motor contactor are by motor M main circuit contact device MK, and corner connection operation contactor △ K, star meet operation contactor YK to be formed, and the binding post of controller K is 1,2,3,4;

B, motor M main circuit contact device MK coil, corner connection operation contactor △ K coil, star connects operation contactor YK coil and is connected power supply A phase with controller K binding post 1, the other end of coil MK and controller K binding post 3 and starting button QA, the normally opened contact of main circuit contact device MK links to each other, starting button QA, the other end of the normally opened contact of contactor MK also connects the back by stop button TA connection power supply B phase, the other end of corner connection operation contactor △ K coil links to each other with the binding post 4 of controller K by the normally-closed contact that star meets operation contactor YK, constitute corner connection operation circuit, the other end that star connects operation contactor YK coil links to each other with the binding post 2 of controller K by the normally-closed contact that corner connection moves contactor △ K, constitutes star and connects the operation circuit;

Current transformer L in C, the controller K ₁, L ₂, L ₃An end connect diode D respectively ₁, D ₂, D ₃Negative pole, D ₁, D ₂, D ₃Anodal and connect the back and connect capacitor C ₁Negative pole and potentiometer RW, the other end of potentiometer RW and triode V ₁Base stage and resistance R ₁Link to each other triode V ₁Collector electrode and resistance R ₂With triode V ₂Base stage links to each other, triode V ₂Collector electrode by luminous tube D ₄Connect resistance R ₃And R ₄, resistance R ₄The other end and capacitor C ₂Positive pole and voltage-stabiliser tube D ₅Negative pole links to each other, voltage-stabiliser tube D ₅Positive pole connect triode V ₃Base stage, triode V ₃Collector electrode pass through resistance R ₅Connect resistance R ₆With triode V ₄Base stage, triode V ₄Collector electrode by relay J coil and voltage-stabiliser tube D ₆Anodal, triode V ₃Emitter, capacitor C ₂Negative pole, diode D ₇, D ₈Positive pole and resistance R ₂, R ₃Be connected diode D ₉, D ₁₀Negative pole and connect after pass through resistance R ₇With current transformer L ₁, L ₂, L ₃The other end, capacitor C ₁Anodal, triode V ₁, V ₂, V ₄Emitter, voltage-stabiliser tube D ₆Negative pole and resistance R ₁, R ₆Be connected diode D ₈Negative pole, D ₁₀Positive pole and capacitor C ₃, resistance R ₈Connect capacitor C ₃, resistance R ₈The other end be connected diode D with controller K binding post 1 ₇Negative pole, D ₉The normally-open normally-close moving contact and the controller K binding post 3 of anodal, relay factory and connect after, again respectively by relay J often open fixed contact J-Y and controller K binding post 2 is connected to form star wiring running control circuit, be connected to form corner connection line running control circuit by normally closed fixed contact J-△ of relay J and controller K binding post 4.