CN203722468U - Hysteresis control unit used in power supply starting process of electronic tripper of low-voltage circuit breaker - Google Patents
Hysteresis control unit used in power supply starting process of electronic tripper of low-voltage circuit breaker Download PDFInfo
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- CN203722468U CN203722468U CN201420059030.5U CN201420059030U CN203722468U CN 203722468 U CN203722468 U CN 203722468U CN 201420059030 U CN201420059030 U CN 201420059030U CN 203722468 U CN203722468 U CN 203722468U
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- 230000000977 initiatory effect Effects 0.000 claims description 9
- 230000000052 comparative effect Effects 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The utility model relates to a hysteresis control unit used in the power supply starting process of an electronic tripper of a low-voltage circuit breaker. The hysteresis control unit comprises a quickly-saturated current transformer which passes through a rectification circuit to form output. An energy storage circuit is connected across the two output ends of the rectification circuit, and the energy storage circuit stores energy required for a driving unit to drive the tripper to perform tripping. The hysteresis control unit is characterized in that the output ends of the rectification circuit are connected with a switching power supply through a switching circuit unit, the output ends of the rectification circuit are further connected to a control unit, the control unit causes the switching circuit unit to be opened and conducted when the voltage is higher than a set threshold and causes the switching circuit unit to be closed and cut off when the voltage is lower than the set threshold, and the output end of the switching power supply is connected with a load side. The following beneficial effects are achieved: a switching power supply voltage stabilizing chip is prevented from outputting power supply voltage of which fluctuation deviates from normal level to an MCU; and current starting is improved after improvement compared with the existing controller scheme.
Description
Technical field
The utility model relates to a kind of hysteresis control unit that is applied to low-voltage circuit breaker electronic trip unit power initiation process.
Background technology
Electronic controller is the core control devices of frame circuit breaker, and the power supply of electronic controller is mainly by being arranged on quick-magnetic saturated current transformer and the two kinds of modes of external accessory power supply on circuit breaker busbar.The iron core of quick-magnetic saturated current transformer is to design at magnetic saturation state, and in the time that once winding current is greater than certain current value, the actual current ratio of first and second winding no longer keeps certain constant, secondary winding current saturation, and power in current source mode.It is the time institute's energy requirement of normally working to controller that accessory power supply can provide the voltage transitions of 220VAC or 380VAC by transformer.
In the situation that electronic type release is powered without accessory power supply at the scene, when electronic controller is in the time that the little electric current of busbar is powered, electronic controller power supply, in start-up course, can present " dummy load side " phenomenon.When switching tube is opened while powering to load-side, the voltage of input can be by drop-down and can form very large hysteresis voltage.The hysteresis voltage of input can cause power conversion chip output voltage return difference large, can cause like this MCU supply voltage in normal power supply voltage fluctuation.Once supply voltage lower than MCU reference voltage, can cause the sampling of MCU mistake, misoperation, can cause very large risk to electronic controller defencive function.
As shown in Figure 1, in existing electronic type release, in power initiation process, can process the hysteresis voltage forming by metal-oxide-semiconductor copped wave, but this kind of scheme to drawback be that in start-up course metal-oxide-semiconductor can loss of energy, can increase like this power consumption.
Summary of the invention
The technical problems to be solved in the utility model is in to hysteresis voltage processing, can not increase power consumption.
In order to achieve the above object, the technical solution of the utility model has been to provide a kind of for low-voltage circuit breaker electronic trip unit power initiation process hysteresis control unit, comprise quick-magnetic saturated current transformer, quick-magnetic saturated current transformer forms output via rectification circuit, cross-over connection accumulator between two outputs of rectification circuit, carry out dropout institute energy requirement by accumulator storing driver unit drives release, it is characterized in that: the output of rectification circuit is via switching circuit unit connecting valve power supply, the output of rectification circuit is access control unit also, when higher than setting threshold, open and keep conducting when lower than setting threshold, to close and remain off simultaneously by control unit control switch circuit unit, the output of Switching Power Supply connects load-side.
Preferably, described switching circuit unit comprises the first switching device and the second switch device of serial connection, the output of described control unit connects the control end of second switch device, by control unit control this second switch break-over of device or cut-off, the output of second switch device connects the control end of the first switching device, by second switch device control the first switching device conducting or cut-off, the output of described rectification circuit connects the input of described Switching Power Supply via the first switching device.
Preferably, described control unit adopts the positive feedback hysteresis unit being made up of operational amplifier.
Preferably, described positive feedback hysteresis unit comprises operational amplifier, the output of described rectification circuit is via the in-phase input end of resistance concatenation operation amplifier, the inverting input of operational amplifier connects comparative voltage, the output of operational amplifier takes back its in-phase input end via resistance, and the output of this operational amplifier also connects described switching circuit unit via resistance.
In the utility model, load-side is mainly MCU and MCU peripheral circuit institute energy requirement.
Feature of the present utility model is:
The first, quick-magnetic saturated current transformer output current is large through load-side formation voltage back diffirence, adds hysteresis design, avoids Switching Power Supply voltage stabilizing chip to export to MCU mains ripple and departs from normal Power supply voltage.
The second, remove the chopper circuit of industry electronic controller metal-oxide-semiconductor, improve after-current startup and increase than existing controller scheme.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing control circuit;
Fig. 2 A is basic circuit diagram of the present utility model;
Fig. 2 B is the basic circuit diagram of positive feedback hysteresis unit;
Fig. 3 be by the utility model for circuit the circuit diagram for the supporting intelligent controller scheme of NA1-1000.
Embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
In conjunction with Fig. 2 A, the one that the utility model provides is for low-voltage circuit breaker electronic trip unit power initiation process hysteresis control unit, comprise quick-magnetic saturated current transformer, quick-magnetic saturated current transformer forms output via rectification circuit (this rectification circuit is not shown), this output via the diode of serial connection after one end form output PV2, the other end connects with reference to ground PGND.The energy that storage capacitor C1 stores is to drive release to carry out to thread off.
In conjunction with Fig. 2 B, the in-phase input end of operational amplifier U4A connects with reference to ground PGND via resistance R 6, also connect output PV2 via resistance R 4 simultaneously, the reverse input end of operational amplifier U4A connects 2.5V reference voltage, the output connection of operational amplifier U4A takes back its in-phase input end via resistance R 5, thereby formed positive feedback hysteresis unit, the output of operational amplifier U4A is via resistance R 7 formation control output EN1.This control output end EN1 drives metal-oxide-semiconductor Q1 conducting and the cut-off in Fig. 2 A, this area designer should Rational choice resistance R 6, the resistance of resistance R 4 and resistance R 5, while making the voltage of output PV2 reach 16V, control output end EN1 produces and drives signal controlling metal-oxide-semiconductor Q1 to open, and continue to produce driving signal preservation metal-oxide-semiconductor Q1 in conducting state by control output end EN1, until the voltage of output PV2 is during lower than 10V, control output end EN1 does not produce signal, and metal-oxide-semiconductor Q1 closes and remain off state.
Get back to Fig. 2 A, the control end of triode Q2 connects metal-oxide-semiconductor Q1, its input connects output PV2, output connecting valve power supply U1, when metal-oxide-semiconductor Q1 is during in conducting state, the driving signal that control output end EN1 produces drives triode Q2 open and keep conducting state via metal-oxide-semiconductor Q1, and the voltage of output PV2, via triode Q2 input switch power supply U1, makes Switching Power Supply U1 voltage stabilizing export to load-side R energy is provided.When metal-oxide-semiconductor Q1 is during in cut-off state, triode Q2 is corresponding cut-off also, and Switching Power Supply U1 closes, and has eliminated like this impact that causes the MCU supply power voltage on load-side R because of hysteresis voltage.Between the input of triode Q2 and control end, the Schottky diode ZD1 of cross-over connection, for the protection of the PN junction voltage of triode Q2, prevents that overvoltage from damaging pipe.
As shown in Figure 3, by the utility model for after the supporting intelligent controller scheme of NA1-1000 be example as shown in Figure 3, C3, C5 are storage capacitor, C4, C6 are filter capacitor.
Claims (4)
1. one kind for low-voltage circuit breaker electronic trip unit power initiation process hysteresis control unit, comprise quick-magnetic saturated current transformer, quick-magnetic saturated current transformer forms output via rectification circuit, cross-over connection accumulator between two outputs of rectification circuit, carry out dropout institute energy requirement by accumulator storing driver unit drives release, it is characterized in that: the output of rectification circuit is via switching circuit unit connecting valve power supply (U1), the output of rectification circuit is access control unit also, when higher than setting threshold, open and keep conducting when lower than setting threshold, to close and remain off simultaneously by control unit control switch circuit unit, the output of Switching Power Supply (U1) connects load-side (R).
2. one as claimed in claim 1 is for low-voltage circuit breaker electronic trip unit power initiation process hysteresis control unit, it is characterized in that: described switching circuit unit comprises the first switching device and the second switch device of serial connection, the output of described control unit connects the control end of second switch device, by control unit control this second switch break-over of device or cut-off, the output of second switch device connects the control end of the first switching device, by second switch device control the first switching device conducting or cut-off, the output of described rectification circuit connects the input of described Switching Power Supply (U1) via the first switching device.
3. one as claimed in claim 1, for low-voltage circuit breaker electronic trip unit power initiation process hysteresis control unit, is characterized in that: described control unit adopts the positive feedback hysteresis unit being made up of operational amplifier.
4. one as claimed in claim 3 is for low-voltage circuit breaker electronic trip unit power initiation process hysteresis control unit, it is characterized in that: described positive feedback hysteresis unit comprises operational amplifier (U4A), the output of described rectification circuit is via the in-phase input end of resistance concatenation operation amplifier (U4A), the inverting input of operational amplifier (U4A) connects comparative voltage, the output of operational amplifier (U4A) takes back its in-phase input end via resistance, the output of this operational amplifier (U4A) also connects described switching circuit unit via resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420059030.5U CN203722468U (en) | 2014-02-08 | 2014-02-08 | Hysteresis control unit used in power supply starting process of electronic tripper of low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420059030.5U CN203722468U (en) | 2014-02-08 | 2014-02-08 | Hysteresis control unit used in power supply starting process of electronic tripper of low-voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203722468U true CN203722468U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420059030.5U Expired - Lifetime CN203722468U (en) | 2014-02-08 | 2014-02-08 | Hysteresis control unit used in power supply starting process of electronic tripper of low-voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203722468U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559047A (en) * | 2014-09-30 | 2017-04-05 | 天工方案公司 | The enhanced biasing circuit of Schottky |
-
2014
- 2014-02-08 CN CN201420059030.5U patent/CN203722468U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559047A (en) * | 2014-09-30 | 2017-04-05 | 天工方案公司 | The enhanced biasing circuit of Schottky |
| CN106559047B (en) * | 2014-09-30 | 2022-02-25 | 天工方案公司 | Schottky enhanced bias circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHEJIANG CHINT ELECTRICS Co.,Ltd. Assignor: SHANGHAI NOARK ELECTRIC Co.,Ltd. Contract record no.: X2021330000593 Denomination of utility model: Hysteresis control unit for starting power supply of electronic release of low voltage circuit breaker Granted publication date: 20140716 License type: Common License Record date: 20211025 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |
|
| CX01 | Expiry of patent term |