CN101752143A - Energy saver for AC contactor - Google Patents
Energy saver for AC contactor Download PDFInfo
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- CN101752143A CN101752143A CN201010040019A CN201010040019A CN101752143A CN 101752143 A CN101752143 A CN 101752143A CN 201010040019 A CN201010040019 A CN 201010040019A CN 201010040019 A CN201010040019 A CN 201010040019A CN 101752143 A CN101752143 A CN 101752143A
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Abstract
The invention discloses an energy saver for an AC contactor, which comprises a half-wave rectification circuit, a square-wave generation circuit, a DC voltage-regulated power supply circuit, a signal converter and a charge/discharge circuit. The half-wave rectification circuit is used for half-wave rectification of mains power, the square-wave generation circuit is used for providing square-wave input for the signal converter, the DC voltage-regulated power supply circuit is used for providing a stable DC power supply for the signal converter, the signal output end of the signal converter is used for providing a control signal for the charge/discharge circuit, and the load of the charge/discharge circuit is an AC contactor. The current of the coil of the AC contactor can be changed through changing the pulse width of the output end of the signal converter, thereby realizing that the high current can flow through the coil of the AC contactor when the contacts of the AC contactor are closed, and the low current can flow through the coil of the AC contactor when the closed state of the contacts of the AC contactor is maintained. Therefore, the invention realizes the energy-saving operation of the AC contactor, reduces the noise and the temperature rise of the coil of the AC contactor, and prolongs the service life of the AC contactor.
Description
Technical field
The present invention relates to the low voltage electrical apparatus technology field, relate in particular to a kind of energy-saving appliance of A.C. contactor.
Background technology
A.C. contactor is to use a kind of very widely low-voltage electrical apparatus in the industrial production, be mainly used in the operation of power consumption equipments such as control motor etc. and stop, common A.C. contactor is after adhesive, still leading to alternating current in the coil of A.C. contactor, the power consumption that is caused by iron loss and copper loss is very big, so coil heating, noise is big, not only wastes the aging easily lost of life that makes A.C. contactor of insulation of electric energy but also coil.Under the overall situation of energy-saving and emission-reduction, the energy consumption that reduces A.C. contactor has remarkable economic efficiency and social benefit.
Most alternating-current contactor energy-saving device adopts chip microcontroller on the market, and its cost is higher, and is disturbed easily and cause the internal processes execution error.
Summary of the invention
The invention provides a kind of low cost, the energy-saving appliance that is used for A.C. contactor simple in structure; can reduce the power consumption of ac contactor electromagnetic system; reduce the coil noise and the temperature rise of A.C. contactor simultaneously; main circuit to A.C. contactor has defencive function, prolongs the useful life of A.C. contactor.
A kind of energy-saving appliance that is used for A.C. contactor, comprise half-wave rectifying circuit, square wave generation circuit, DC-stabilized circuit, signal converter and charge-discharge circuit, described half-wave rectifying circuit input connects first power input, described square wave generation circuit, DC-stabilized circuit and charge-discharge circuit are connected in parallel between the output and second source input of described half-wave rectifying circuit, the DC-stabilized circuit output connects the power input of signal converter, square wave generation circuit output end connects the signal input part of signal converter, second input of signal converter links to each other with the second source input, and the output of signal converter is connected to the control end of charge-discharge circuit.
Described half-wave rectifying circuit is made up of first diode, and the anode of first diode is the half-wave rectifying circuit input, and the negative electrode of first diode is the half-wave rectifying circuit output.
Described square wave generation circuit is by the 3rd resistance, the 3rd voltage stabilizing didoe and second resistance are formed, the 3rd resistance is in parallel with the 3rd voltage stabilizing didoe, the 3rd resistance links to each other with first end points of second resistance with first end points of the 3rd voltage stabilizing didoe parallel connection, the 3rd resistance links to each other with the second source input with second end points of the 3rd voltage stabilizing didoe parallel connection, second end points of second resistance links to each other with the half-wave rectifying circuit output, the 3rd resistance first end points in parallel with the 3rd voltage stabilizing didoe is square wave generation circuit output end, and the negative electrode of the 3rd voltage stabilizing didoe links to each other with square wave generation circuit output end.
Described DC-stabilized circuit is by first electrochemical capacitor, the 3rd ceramic disc capacitor, the 4th voltage stabilizing didoe and first resistance are formed, first electrochemical capacitor, the 3rd ceramic disc capacitor, the 4th voltage stabilizing didoe parallel connection, first electrochemical capacitor, the 3rd ceramic disc capacitor, first end points of the 4th voltage stabilizing didoe parallel connection links to each other with first end points of first resistance, first electrochemical capacitor, the 3rd ceramic disc capacitor, second end points of the 4th voltage stabilizing didoe parallel connection links to each other with the second source input, second end points of first resistance links to each other with the half-wave rectifying circuit output, first electrochemical capacitor, the 3rd ceramic disc capacitor, first end points of the 4th voltage stabilizing didoe parallel connection is the DC-stabilized circuit output, the negative electrode of the 4th voltage stabilizing didoe links to each other with the DC-stabilized circuit output, and the positive pole of first electrochemical capacitor links to each other with the DC-stabilized circuit output.
DC-stabilized circuit produces the DC power supply voltage of a more stable 5V, is used for the power supply of signal converter chip.Wherein first electrochemical capacitor plays low frequency filtering, and the 3rd ceramic disc capacitor plays the High frequency filter effect.By the signal processing of signal converter, its output Out exports the signal of certain duty ratio, as the voltage waveform signal of Out among Fig. 2.This output connects the first silicon controlled control end.The 4th resistance and second capacitances in series play the protection first silicon controlled effect.
Described charge-discharge circuit is by the 4th resistance, second electric capacity, first controllable silicon and second diode are formed, in parallel after the 4th resistance and second capacitances in series with first controllable silicon, link to each other with the anode of second diode with first end points of the first controllable silicon parallel connection after the 4th resistance and second capacitances in series, the described first silicon controlled anode connects the anode of second diode, link to each other with the second source input with second end points of controllable silicon parallel connection after the 4th resistance and second capacitances in series, the negative electrode of second diode links to each other with the half-wave rectifying circuit output, the negative electrode of second diode and anode connect the load A.C. contactor, and first silicon controlled is controlled the very control end of charge-discharge circuit.When entire circuit begins to power on, the signal converter chip output cycle is 20ms (frequency is 50HZ), duty ratio is the square-wave signal of 50% (pulse duration is 10ms), in a single day signal converter chip Out exports high level after powering on, its grid of controlling first controllable silicon (thyristor) makes its conducting, circuit E point half sine wave voltage is charged to ac contactor coil by the thyristor of conducting, and the electric current on the coil increases to bigger value.When being in zero level after the E point process half period, because the electric current on the coil can not suddenly change, and this moment, the anode voltage of thyristor reduced, cause thyristor to end, so coil can only discharge by second diode, electric current on the coil reduces at leisure, through behind the 10ms, electric current is reduced to peaked 80%-90% on the coil, and this moment, the E point experienced half-sine wave again, and the anode voltage of thyristor raises, and signal converter chip Out output output this moment positive pulse, cause thyristor to be opened again, coil charges, and coil current begins again to rise.From circuit begin to power on about 130ms (6 cycles) during this period of time in, coil current is bigger always, this big coil current guarantees contact adhesive reliably after powering on of A.C. contactor.After the 130ms that powers on, the signal converter chip Out output cycle is 20ms, duty ratio less square-wave signal (is 15% or littler as duty ratio).Because this moment, the ON time of thyristor became shorter, discharge time is longer, coil current is reduced to original peaked about 20%, and when Out is in high level, the voltage that the E point is corresponding is little, through the charging of the less pulse width time of duty ratio, coil current can not increase much yet, remains on a lower value.This moment, coil current was in little current status, kept the closure of A.C. contactor contact.Because the electric current on the coil is very little; therefore energy-saving appliance is realized the purpose of the power consumption of reduction A.C. contactor; also reduce simultaneously the coil noise and the temperature rise of A.C. contactor, the main circuit of A.C. contactor has been had defencive function, prolonged the useful life of A.C. contactor.
When two programming pins of signal converter chip select to connect power supply or the four kinds of situations in ground respectively, can make the square-wave signal of signal converter 4 kinds of different duty of Out end output behind the 130ms that powers on, this function has been expanded the scope of application of this energy-saving appliance greatly, makes it be applicable to A.C. contactors dissimilar on the market as required.
The described signal converter of energy-saving appliance that is used for A.C. contactor of the present invention adopts the special signal conversion chip to substitute single-chip microcomputer, the power on periodic pulse signal of (about 130ms) output narrow pulse width after a period of time of signal converter, the conducting of controlling one-way SCR with end, thereby realize that ac contactor coil flows through big electric current when the probe of contactor adhesive, coil flow through little electric current when probe of contactor was kept the sticking state.So just realize the energy-saving run of A.C. contactor, thereby also realized reducing the coil noise and the temperature rise of A.C. contactor, prolonged the useful life of A.C. contactor.
Use the special signal converter chip in this invention, compare with single-chip microcomputer, its cost is lower, does not allow to be subject to disturb and causes the internal processes execution error.The application circuit of this energy-saving appliance is simple, and volume is little, in the A.C. contactor of can directly packing into, can transform existing conventional AC contactor easily like this.The synchronous signal transducer has two programming pins, can produce the pulse signal of 4 kinds of different pulse durations, goes for various types of A.C. contactors on the market.
Description of drawings
Fig. 1 is the structural representation of energy-saving appliance of the present invention.
Fig. 2 is the voltage or the electric current output schematic diagram of each several part shown in Figure 1.
Embodiment
As shown in Figure 1, a kind of energy-saving appliance that is used for A.C. contactor comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, diode D1, diode D2, voltage stabilizing didoe D3, voltage stabilizing didoe D4, electrochemical capacitor C1, ceramic disc capacitor C2, ceramic disc capacitor C3, one-way SCR Q1 and signal converter.The alternating current of input 220V or 380V between the first input signal AC1 and the second input signal AC2, with the second input signal AC2 is the reference ground of circuit, diode D1 anode meets the first input signal AC1 and constitutes half-wave rectifying circuit, and diode D1 negative electrode E point is the half-wave rectifying circuit output.
Connect with resistance R 2 again after resistance R 3 and the voltage stabilizing didoe D3 parallel connection, constitute a power frequency (50Hz) square wave generation circuit, producing an approximate cycle is 20ms, duty ratio is the square-wave signal of 50% (pulse duration is 10ms), the tie point F point of connecting with resistance R 2 again after resistance R 3 and the voltage stabilizing didoe D3 parallel connection is a square wave generation circuit output end, and this square-wave signal is input to the signal input part signal of signal converter chip.
Electrochemical capacitor C1, ceramic disc capacitor C3, voltage stabilizing didoe D4 and resistance R 1 are formed DC-stabilized circuit, electrochemical capacitor C1, ceramic disc capacitor C3, voltage stabilizing didoe D4 parallel connection, electrochemical capacitor C1, ceramic disc capacitor C3, first end points of voltage stabilizing didoe D4 parallel connection links to each other with first end points of resistance R 1, electrochemical capacitor C1, ceramic disc capacitor C3, second end points of voltage stabilizing didoe D4 parallel connection links to each other with the second source input, second end points of resistance R 1 links to each other with half-wave rectifying circuit output E point, electrochemical capacitor C1, ceramic disc capacitor C3, first end points of voltage stabilizing didoe D4 parallel connection is the DC-stabilized circuit output, the DC-stabilized circuit output links to each other with the power input A of signal converter, the negative electrode of voltage stabilizing didoe D4 links to each other with the DC-stabilized circuit output, and the positive pole of electrochemical capacitor C1 links to each other with the DC-stabilized circuit output.
Charge-discharge circuit is by resistance R 4, capacitor C 2, controllable silicon Q1 and diode D2 form, it is in parallel after resistance R 4 is connected with capacitor C 2 with controllable silicon Q1, resistance R 4 links to each other with the anode of diode D2 with first end points of controllable silicon Q1 parallel connection with capacitor C 2 series connection backs, the anode of described controllable silicon Q1 connects the anode of diode D2, resistance R 4 links to each other with second source input AC2 with second end points of controllable silicon parallel connection with capacitor C 2 series connection backs, the negative electrode of diode D2 links to each other with half-wave rectifying circuit output E point, the negative electrode of diode D2 and anode connect the J1 and the J2 end of load A.C. contactor, and the control of the controllable silicon Q1 very control end of charge-discharge circuit links to each other with signal converter output OUT.
Controllable silicon Q1 adopts thyristor.
The voltage waveform that E is ordered after the rectification is shown in the waveform A in the accompanying drawing 2, square wave generation circuit output end F point voltage waveform is shown in the waveform B in the accompanying drawing 2, the voltage waveform of signal converter output OUT is shown in the waveform C in the accompanying drawing 2, and the ac contactor coil electric current is shown in the waveform D in the accompanying drawing 2.
Waveform A is to be 20ms in the cycle, and duty ratio is the sinusoidal wave-wave signal of 50% (pulse duration is 10ms).
Waveform B is to be 20ms in the cycle, and duty ratio is the square-wave signal of 50% (pulse duration is 10ms).
Waveform C is to be 20ms in the cycle in the first six cycle, and duty ratio is the square-wave signal of 50% (pulse duration is 10ms), and six all after dates are 20ms, and duty ratio is the square-wave signal of 15% (pulse duration is 3ms).
Waveform D represents that the ac contactor coil electric current keeps a bigger electric current in the first six cycle, is beneficial to exchange the contact adhesive, and six all after dates keep a less current, keep the closure of A.C. contactor contact.Because the electric current on the coil is very little; therefore energy-saving appliance is realized the purpose of the power consumption of reduction A.C. contactor; also reduce simultaneously the coil noise and the temperature rise of A.C. contactor, the main circuit of A.C. contactor has been had defencive function, prolonged the useful life of A.C. contactor.
When two programming pins of signal converter chip select to connect power supply or the four kinds of situations in ground respectively, can make the square-wave signal of signal converter 4 kinds of different duty of Out end output behind the 130ms that powers on, this function has been expanded the scope of application of this energy-saving appliance greatly, makes it be applicable to A.C. contactors dissimilar on the market as required.
Claims (5)
1. energy-saving appliance that is used for A.C. contactor, it is characterized in that: comprise half-wave rectifying circuit, square wave generation circuit, DC-stabilized circuit, signal converter and charge-discharge circuit, described half-wave rectifying circuit input connects first power input, described square wave generation circuit, DC-stabilized circuit and charge-discharge circuit are connected in parallel between the output and second source input of described half-wave rectifying circuit, the DC-stabilized circuit output connects the power input of signal converter, square wave generation circuit output end connects the signal input part of signal converter, second input of signal converter links to each other with the second source input, and the output of signal converter is connected to the control end of charge-discharge circuit.
2. energy-saving appliance as claimed in claim 1, it is characterized in that: described half-wave rectifying circuit is made up of first diode (D1), the anode of first diode (D1) is the half-wave rectifying circuit input, and the negative electrode of first diode (D1) is the half-wave rectifying circuit output.
3. energy-saving appliance as claimed in claim 1, it is characterized in that: described square wave generation circuit is by the 3rd resistance (R3), the 3rd voltage stabilizing didoe (D3) is formed with second resistance (R2), the 3rd resistance (R3) is in parallel with the 3rd voltage stabilizing didoe (D3), the 3rd resistance (R3) links to each other with first end points of second resistance (R2) with first end points of the 3rd voltage stabilizing didoe (D3) parallel connection, the 3rd resistance (R3) links to each other with the second source input with second end points of the 3rd voltage stabilizing didoe (D3) parallel connection, second end points of second resistance (R2) links to each other with the half-wave rectifying circuit output, the 3rd resistance (R3) first end points in parallel with the 3rd voltage stabilizing didoe (D3) is square wave generation circuit output end, and the negative electrode of the 3rd voltage stabilizing didoe (D3) links to each other with square wave generation circuit output end.
4. energy-saving appliance as claimed in claim 1, it is characterized in that: described DC-stabilized circuit is by first electrochemical capacitor (C1), the 3rd ceramic disc capacitor (C3), the 4th voltage stabilizing didoe (D4) is formed with first resistance (R1), first electrochemical capacitor (C1), the 3rd ceramic disc capacitor (C3), the 4th voltage stabilizing didoe (D4) parallel connection, first electrochemical capacitor (C1), the 3rd ceramic disc capacitor (C3), the 4th voltage stabilizing didoe (D4) first end points in parallel links to each other with first end points of first resistance (R1), first electrochemical capacitor (C1), the 3rd ceramic disc capacitor (C3), the 4th voltage stabilizing didoe (D4) second end points in parallel links to each other with the second source input, second end points of first resistance (R1) links to each other with the half-wave rectifying circuit output, first electrochemical capacitor (C1), the 3rd ceramic disc capacitor (C3), the 4th voltage stabilizing didoe (D4) first end points in parallel is the DC-stabilized circuit output, the negative electrode of the 4th voltage stabilizing didoe (D4) links to each other with the DC-stabilized circuit output, and the positive pole of first electrochemical capacitor (C1) links to each other with the DC-stabilized circuit output.
5. energy-saving appliance as claimed in claim 1, it is characterized in that: described charge-discharge circuit is by the 4th resistance (R4), second electric capacity (C2), first controllable silicon (Q1) and second diode (D2) are formed, it is in parallel after the 4th resistance (R4) is connected with second electric capacity (C2) with first controllable silicon (Q1), the 4th resistance (R4) links to each other with the anode of second diode (D2) with first end points of second electric capacity (C2) series connection back and first controllable silicon (Q1) parallel connection, the anode of described first controllable silicon (Q1) connects the anode of second diode (D2), the 4th resistance (R4) links to each other with the second source input with second end points of controllable silicon parallel connection with second electric capacity (C2) series connection back, the negative electrode of second diode (D2) links to each other with the half-wave rectifying circuit output, the negative electrode and the anode of second diode (D2) connect the load A.C. contactor, and the control of first controllable silicon (Q1) is the control end of charge-discharge circuit very.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010040019A CN101752143A (en) | 2010-01-18 | 2010-01-18 | Energy saver for AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010040019A CN101752143A (en) | 2010-01-18 | 2010-01-18 | Energy saver for AC contactor |
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| CN101752143A true CN101752143A (en) | 2010-06-23 |
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| CN201010040019A Pending CN101752143A (en) | 2010-01-18 | 2010-01-18 | Energy saver for AC contactor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543577A (en) * | 2010-12-17 | 2012-07-04 | 施耐德电器工业公司 | Electromagnetic actuator with at least two coils |
| CN102709118A (en) * | 2012-06-14 | 2012-10-03 | 浙江大学 | Economizer of alternative-current contactor |
| WO2017113843A1 (en) * | 2015-12-31 | 2017-07-06 | 广州金升阳科技有限公司 | Energy-saving circuit for contactor |
| CN107658182A (en) * | 2017-09-28 | 2018-02-02 | 成都雅骏新能源汽车科技股份有限公司 | A kind of circuit and method of low-voltage direct control A.C. contactor |
| CN111640604A (en) * | 2020-05-28 | 2020-09-08 | 新驰电气集团有限公司 | Low-power-consumption control and protection switching device |
-
2010
- 2010-01-18 CN CN201010040019A patent/CN101752143A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543577A (en) * | 2010-12-17 | 2012-07-04 | 施耐德电器工业公司 | Electromagnetic actuator with at least two coils |
| CN102543577B (en) * | 2010-12-17 | 2016-03-09 | 施耐德电器工业公司 | There is the electromagnetic actuators of at least two coils |
| CN102709118A (en) * | 2012-06-14 | 2012-10-03 | 浙江大学 | Economizer of alternative-current contactor |
| CN102709118B (en) * | 2012-06-14 | 2014-05-07 | 浙江大学 | Economizer of alternative-current contactor |
| WO2017113843A1 (en) * | 2015-12-31 | 2017-07-06 | 广州金升阳科技有限公司 | Energy-saving circuit for contactor |
| US11069499B2 (en) | 2015-12-31 | 2021-07-20 | Mornsun Guangzhou Science & Technology Co., Ltd. | Power-saving circuit for contactor |
| CN107658182A (en) * | 2017-09-28 | 2018-02-02 | 成都雅骏新能源汽车科技股份有限公司 | A kind of circuit and method of low-voltage direct control A.C. contactor |
| CN111640604A (en) * | 2020-05-28 | 2020-09-08 | 新驰电气集团有限公司 | Low-power-consumption control and protection switching device |
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Application publication date: 20100623 |