CN207117523U

CN207117523U - Current trigger formula electric motor electricity saver

Info

Publication number: CN207117523U
Application number: CN201721011689.3U
Authority: CN
Inventors: 高玉琴
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-08-14
Filing date: 2017-08-14
Publication date: 2018-03-16
Anticipated expiration: 2027-08-14

Abstract

A kind of current trigger formula electric motor electricity saver, it includes bidirectional triode thyristor SCR, the triggers circuit of triggering bidirectional triode thyristor conducting being serially connected in single-phase motor MD current supply circuits, and described triggers circuit includes current transformer LH, triode T1, optocoupler GE1；The electric current Ia of single-phase motor is converted to corresponding voltage by current transformer, all-view signal voltage Ui is formed after the voltage is rectified, its waveform is compared with a reference voltage Ug, when waveform is less than reference voltage, the pulse signal of triggering bidirectional triode thyristor is produced, when the power factor of motor reduces, reduce the angle of flow of controllable silicon, the terminal voltage of single-phase motor reduces, and the power factor of single-phase motor rises, and its power savings is up to 20%.Current transformer provides the power supply of synchronizing signal and triggers circuit, eliminates traditional phase detecting circuit so that the electronic line structure of electricity-saving appliance simplifies significantly.

Description

Current trigger formula electric motor electricity saver

Technical field

A kind of electric motor electricity saver is the utility model is related to, its terminal voltage by adjusting motor, reaches the mesh of economize on electricity , it can be supported the use with little power single phase motor.

Background technology

Its structure of existing electric motor electricity saver generally comprises controllable silicon, phase detecting circuit, comparison circuit, triggers circuit And working power, wherein phase detecting circuit are used for detecting the phase between supply voltage and motor current, phase-detection Circuit includes current transformer, step-down transformer and some electronic components；Comparison circuit enters phase signal and a setting value Row compares, and triggers circuit exports the trigger signal of triggering controllable silicon according to comparative result, and working power will be set in addition, to compare Circuit, triggers circuit provide operating voltage.The structure of this kind of electricity-saving appliance is more complicated, and production cost is high, is unfavorable for promoting.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of current trigger formula electric motor electricity saver, the letter of its structure Single, the electronic component used is few, and has preferable power savings.

The technical solution of the utility model is that a kind of current trigger formula electric motor electricity saver, it includes being serially connected in single-phase electricity Bidirectional triode thyristor SCR, the triggers circuit and start triggering circuit of triggering bidirectional triode thyristor conducting in motivation MD current supply circuits The start-up circuit of work, it is characterized in that, described triggers circuit includes current transformer LH, triode T1, optocoupler GE1, electric current Transformer LH primary coil is serially connected in the current supply circuit of motor, current transformer LH secondary coil and a bridge rectifier Device QL1 input connection, the negative pole ground connection of bridge rectifier QL1 output end, the positive pole of bridge rectifier QL1 output end It is grounded by resistance R1, the positive pole of bridge rectifier QL1 output end connects triode T1 base stage, and triode T1 emitter stage connects Potentiometer W1 cursor slide, the output end of a potentiometer W1 termination working power, potentiometer W1 other end ground connection, triode T1 Colelctor electrode connect by a current-limiting circuit optocoupler GE1 light emitting diode anode, the negative electrode of optocoupler GE1 light emitting diode connects Ground, one end of optocoupler GE1 optoelectronic controlled silicon connect bidirectional triode thyristor SCR anode by resistance R3, optoelectronic controlled silicon it is another Terminate bidirectional triode thyristor SCR control pole；

Diode D1 anode is connected with the positive pole of full-wave rectifier QL1 output ends, and diode D1 negative electrode passes through electric capacity C1 is grounded, and the tie point between diode D1 negative electrode and electric capacity C1 is the output end of working power.

The characteristics of the utility model is that the electric current Ia of single-phase motor is converted to corresponding voltage by current transformer, should After the rectified circuit rectifies of voltage formed all-view signal voltage Ui, the trailing edge of its waveform compared with a reference voltage Ug, When trailing edge is less than reference voltage, the pulse signal of triggering bidirectional triode thyristor is produced, when the power factor of motor reduces, The electric current of motor can be lagged more, triggered the pulse signal of controllable silicon and can also be lagged generation, reduce the angle of flow of controllable silicon, single The terminal voltage of phase motor reduces, and the power factor of single-phase motor rises.Set again in all-view signal voltage Ui rear class in addition There is filter circuit, the working power as triggers circuit.The utility model provides synchronizing signal and triggering using current transformer The power supply of circuit, eliminate traditional phase detecting circuit so that the electronic line structure of electricity-saving appliance simplifies significantly, electricity-saving appliance line The high-pressure section on road transmits signal without direct electrical connection with low-pressure section by coupling, and when debugging low-pressure section, avoids grasping Workmanship gets an electric shock.

Brief description of the drawings

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

When Fig. 2 is rated load, the oscillogram of each reference point in Fig. 1.

When Fig. 3 is Smaller load, the oscillogram of each reference point in Fig. 1.

Embodiment

In conjunction with brief description of the drawings specific embodiment of the present utility model.

A kind of current trigger formula electric motor electricity saver, it include being serially connected in single-phase motor MD current supply circuits it is two-way can Control silicon SCR, the triggers circuit of triggering bidirectional triode thyristor conducting and start triggering circuit work start-up circuit.

Described triggers circuit includes current transformer LH, triode T1, optocoupler GE1, current transformer LH primary line Circle is serially connected in the current supply circuit of motor, and current transformer LH secondary coil and a bridge rectifier QL1 input connect Connecing, the negative pole ground connection of bridge rectifier QL1 output end, the positive pole of bridge rectifier QL1 output end is grounded by resistance R1, The positive pole of bridge rectifier QL1 output end connects triode T1 base stage, and triode T1 emitter stage connects potentiometer W1 cursor slide, The output end of a potentiometer W1 termination working power, potentiometer W1 other end ground connection, triode T1 colelctor electrode pass through one Current-limiting circuit connects the anode of optocoupler GE1 light emitting diode, the minus earth of optocoupler GE1 light emitting diode, optocoupler GE1 light One end of electrically controllable silicon connects bidirectional triode thyristor SCR anode, another termination bidirectional triode thyristor of optoelectronic controlled silicon by resistance R6 SCR control pole.

Working power circuit includes diode D1, electric capacity C1, diode D1 anode and full-wave rectifier QL1 output ends Positive pole is connected, and diode D1 negative electrode is grounded by electric capacity C1, and the tie point between diode D1 negative electrode and electric capacity C1 is work Make the output end of power supply.The working power circuit structure of electricity-saving appliance can so be simplified.

When single-phase motor is run in rated load condition, working power output voltage VDD can be 9V, 12V or 15V, preferably 12V.The grade of the voltage of working power output is determined by the turn ratio of current mutual inductor coil.

Optocoupler GE1 model TLP160G or TLP525G.

Triode T1 can be the silicon triode of positive-negative-positive, to improve the pole of germanium three for the optional positive-negative-positive of sensitivity for forming pulse Pipe, because the base voltage Ube of germanium triode is only the 1/2 of silicon triode.

The voltage VDD that potentiometer W1 exports to working power carries out partial pressure and forms reference voltage Ug, and reference voltage Ug applies In triode T1 emitter stage, reference voltage Ug waveform is straight line as shown in curve 3 in Fig. 2, the ripple in triode T1 base stages Shape be full-wave rectification ripple shaped like shown in curve in Fig. 24, when the trailing edge or rising edge of current waveform in full-wave rectifier are higher than reference voltage Ug When, triode T1 ON-OFFs；When the trailing edge or rising edge of current waveform in full-wave rectifier are less than in reference voltage Ug, triode T1 Conducting, triode T1 collector current form trigger pulse T as shown in curve 5 in Fig. 2.

By optocoupler GE1 light emitting diode, optocoupler GE1 optoelectronic controlled silicon turns on to be touched triode T1 collector current Bidirectional triode thyristor SCR is sent out, bidirectional triode thyristor SCR conducting region is as shown in curve 6 in Fig. 2.

Described current-limiting circuit is a resistance R2, and resistance R2 termination triode T1 colelctor electrode, resistance R2's is another The anode of optocoupler GE1 light emitting diode is terminated, resistance plays metering function, and to protect light emitting diode, described resistance R2 is such as Shown in dotted portion in Fig. 1.

As an improvement described current-limiting circuit is made up of potentiometer W2 and voltage-stabiliser tube DW1, a potentiometer W2 termination Triode T1 colelctor electrode, the anode of potentiometer W2 another termination optocoupler GE1 light emitting diode, potentiometer W2 cursor slide connect Voltage-stabiliser tube DW1 negative electrode, voltage-stabiliser tube DW1 plus earth.When working power output voltage VDD within the specific limits, current potential Device W2 plays that metering function is identical with resistance R2, when the voltage VDD of working power output is higher than certain value, voltage-stabiliser tube DW1 plays shunting action, and regulation potentiometer W2 can change split ratio, so preferably light emitting diode can be protected.

Trigger pulse T width is related to reference voltage Ug, and the higher trigger pulse T of reference voltage Ug width is wider, adjusts Nodal potential device W1 can adjust reference voltage Ug, make single-phase motor bidirectional triode thyristor SCR in the rated load operation angle of flow Close to 180 degree.

Single-phase motor is in rated load operation, in the voltage u waveforms such as Fig. 2 of civil power shown in curve 1, single-phase motor Current waveform is as shown in curve 2 in Fig. 2, and the bidirectional triode thyristor SCR angle of flow is close to 180 degree as shown in curve 6 in Fig. 2.

Single-phase motor is in Smaller load running, and power factor declines, and the current waveform of single-phase motor is with respect to city The voltage u waveforms of electricity（As shown in curve 1 in Fig. 3）Move to right, trigger pulse T is moved to right, and the angle of flow of controllable silicon reduces（In Fig. 3 Shown in curve 6）, the terminal voltage decline of single-phase motor, the exciting current decline of single-phase motor, power factor rising.

Described start-up circuit can be a button, and the both ends of button are in parallel with optocoupler GE1 optoelectronic controlled silicon both ends（Accompanying drawing In be not drawn into）, after single-phase motor connects civil power, button triggering bidirectional triode thyristor is pressed, single-phase motor has electric current, electric current It is transformer induced go out voltage, release button electricity-saving appliance enters normal operating conditions.

As an improvement described start-up circuit by can diode D2 and electric capacity C2 form, diode D2 anode connects light One end of coupling GE1 optoelectronic controlled silicon, diode D2 negative electrode meet the another of optocoupler GE1 optoelectronic controlled silicon by electric capacity C2 End；Its starting pinciple is, is powered moment in motor, has charging current in electric capacity C2, the charging current be enough to trigger it is two-way can Silicon is controlled, because diode D2 backward resistance is very big, it is believed that electric capacity C2 can only charge and can not discharge, and be tied when electric capacity C2 charges Shu Hou, it is minimum to form electric current in start-up circuit, can not trigger bidirectional triode thyristor, the entrance normal work shape of electricity-saving appliance again State；Charge constant is relevant with resistance R3 resistance and electric capacity C2 capacitance, and charge constant is more than 10 milliseconds with regard to energy Make the entrance normal operating conditions of electricity-saving appliance.

The utility model is applied to below 1KW resistance-start type or capacitor start formula single-phase motor, its power savings Up to 20%.The electronic component used in addition is less, reduces fault rate；The volume of electricity-saving appliance can be substantially reduced, and be easily installed in electricity In the terminal box of motivation, can with it is electronic machine integrated.

Claims

1. a kind of current trigger formula electric motor electricity saver, it includes being serially connected in two-way controllable in single-phase motor MD current supply circuits Silicon SCR, the triggers circuit of triggering bidirectional triode thyristor conducting and start triggering circuit work start-up circuit, it is characterized in that, institute The triggers circuit stated includes current transformer LH, triode T1, optocoupler GE1, and current transformer LH primary coil is serially connected in electricity In the current supply circuit of motivation, current transformer LH secondary coil is connected with the input of a bridge rectifier QL1, bridge rectifier The negative pole ground connection of device QL1 output end, the positive pole of bridge rectifier QL1 output end are grounded by resistance R1, bridge rectifier The positive pole of QL1 output end connects triode T1 base stage, and triode T1 emitter stage connects potentiometer W1 cursor slide, potentiometer W1's The output end of one termination working power, potentiometer W1 other end ground connection, triode T1 colelctor electrode are connect by a current-limiting circuit The anode of optocoupler GE1 light emitting diode, the minus earth of optocoupler GE1 light emitting diode, optocoupler GE1 optoelectronic controlled silicon One end connects bidirectional triode thyristor SCR anode, another termination bidirectional triode thyristor SCR of optoelectronic controlled silicon control by resistance R3 Pole；

Diode D1 anode is connected with the positive pole of full-wave rectifier QL1 output ends, and diode D1 negative electrode is connect by electric capacity C1 Ground, the tie point between diode D1 negative electrode and electric capacity C1 are the output end of working power；

Optocoupler GE1 model TLP160G or TLP525G.

2. current trigger formula electric motor electricity saver according to claim 1, it is characterized in that, described current-limiting circuit is by current potential Device W2 and voltage-stabiliser tube DW1 compositions, potentiometer W2 termination triode T1 colelctor electrode, potentiometer W2 another termination optocoupler The anode of GE1 light emitting diode, potentiometer W2 cursor slide connect voltage-stabiliser tube DW1 negative electrode, voltage-stabiliser tube DW1 plus earth.

3. current trigger formula electric motor electricity saver according to claim 1, it is characterized in that, described start-up circuit is by two poles Pipe D2 and electric capacity C2 compositions, diode D2 anode connect one end of optocoupler GE1 optoelectronic controlled silicon, and diode D2 negative electrode passes through Electric capacity C2 connects the other end of optocoupler GE1 optoelectronic controlled silicon.