CN102790375B - Direct current undervoltage release and circuit breaker - Google Patents
Direct current undervoltage release and circuit breaker Download PDFInfo
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- CN102790375B CN102790375B CN201210277426.2A CN201210277426A CN102790375B CN 102790375 B CN102790375 B CN 102790375B CN 201210277426 A CN201210277426 A CN 201210277426A CN 102790375 B CN102790375 B CN 102790375B
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Abstract
The invention discloses a direct current undervoltage release and a circuit breaker. The direct current undervoltage release comprises a release mechanism and a control circuit, wherein the control circuit comprises an undervoltage detection module, a release control module and a power supply module, wherein the undervoltage detection module is connected with a voltage detection input end; the release control module is coupled with the undervoltage detection module and can carry out pulse width control; the power supply module is connected with the release control module and is used for providing work voltage for the release control module; the release control module comprises a release controllable switch and a PWM (Pulse Width Modulation) control chip; the release controllable switch is connected with the release mechanism; and the PWM control chip is coupled with the release controllable switch and is used for controlling the release controllable switch to be opened or closed. The duty ratio of an output pulse signal is controlled by the PWM control chip capable of carry out pulse width control, so that low power consumption is realized; and the release mechanism is controlled by the PWM control chip to trigger a release operation, so that the possibility of mistaken action caused by fuzzy intermediate state is avoided and the accuracy and the reliability are improved.
Description
Technical field
The present invention relates to field of power distribution, in particular, relate to a kind of direct current undervoltage release and circuit breaker.
Background technology
The use of the overload of distribution line and equipment, under voltage, short-circuit protection mainly born by low-voltage circuit breaker.Under-voltage release is exactly above-mentioned circuit breaker carries out under voltage protection mechanism to low-voltage circuit and power consumption equipment.Under-voltage release needs long-term energising continuously, and its operating characteristics should reach: when voltage detecting input terminal voltage lower than rated operational voltage 35% time, under-voltage release can not close, and prevents breaker closing; Should be able to close when voltage detecting input terminal voltage is equal to or greater than 85% of rated operational voltage, ensure that circuit breaker reliably closes; When voltage detecting input terminal voltage drops in 70% and 35% scope of rated operational voltage, device for under-voltage releasing equipment should disconnect; In addition, under-voltage release also must have high voltage withstanding ability, after tolerance rated voltage detects 110%4 hours of input terminal voltage, still have normal tripping characteristic.Namely require that under-voltage release can reliably close when low-voltage, working properly when high voltage, coil does not burn out.
Current numerous device for under-voltage releasing equipment adopts clapper-type or electromagnet structure form (namely electromagnet discharges automatically when low-voltage) to realize under-voltage protection usually, is all be that main body is to produce suction to ferromagnetic material, electromagnetic energy to be converted to a kind of mechanism of mechanical energy after coil electricity with electromagnetic mechanism.There is the problem of release accuracy of action and consistency difference in this structure, and electromagnet is serious in maintenance adhesive (i.e. coil long-time galvanization under operating conditions) stage heating, easily causes trip coil to burn.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of energy-conservation, that accurately can control release action direct current undervoltage release and circuit breaker.
The object of the invention is to be achieved through the following technical solutions:
A kind of direct current undervoltage release, comprise tripping mechanism and control circuit, described control circuit comprise the under-voltage detection module be connected with voltage detecting input, the carried out pulse width control be coupled with under-voltage detection module dropout operational module, be connected with dropout operational module provide the power module of operating voltage for dropout operational module; Described dropout operational module comprise be connected with described tripping mechanism dropout gate-controlled switch, be coupled with described dropout gate-controlled switch, for controlling the pwm chip that dropout gate-controlled switch divides/closes.
Further, described tripping mechanism comprises the actuating mechanism of magnetic flux coil and the triggering trip action with magnetic flux coil coupling.
Further, current-limiting resistance is in series with between the output of described pwm chip and described dropout gate-controlled switch.Current-limiting resistance can limit the electric current of control loop, avoids dropout gate-controlled switch to damage.
Further, described dropout operational module is also included in the first resistance connected successively, the second resistance, the 3rd resistance that are arranged in series between the both positive and negative polarity of voltage detecting input; The first voltage stabilizing didoe is provided with between the negative pole of described voltage detecting input and the first resistance, the second resistance link; Described second resistance, the 3rd resistance link are coupled to the MOD end of described pwm chip; Be provided with the 4th resistance between the SET end of described pwm chip and the negative pole of voltage detecting input, the operating voltage that power end exports with described power module is connected; The power end of described pwm chip is followed between the negative pole of voltage detecting input and is provided with filter capacitor, and the 5th resistance be arranged in series and the 6th resistance, described 5th resistance and the 6th resistance are arranged in parallel with filter capacitor, and its link is coupled to the DIV end of described pwm chip; The OUT end of described pwm chip is provided with current-limiting resistance with between described dropout gate-controlled switch.This is a kind of dropout operational module circuit based on pwm chip specifically.
Further, described power module has been arranged in series the 7th resistance and the second voltage stabilizing didoe between the both positive and negative polarity of voltage detecting input, and the burning voltage of described second voltage stabilizing didoe is described pwm chip output services voltage.
Further, described under-voltage detection module is included in the 8th resistance and the 9th resistance that are arranged in series between the both positive and negative polarity of voltage detecting input, and follows the 3rd voltage stabilizing didoe of the 9th resistor coupled in parallel setting and postpone electric capacity; The tenth resistance be arranged in series between the both positive and negative polarity of voltage detecting input and the first gate-controlled switch, the control end of described first gate-controlled switch is coupled between described 8th resistance and the 9th resistance; The 4th voltage stabilizing didoe be arranged in parallel with described first gate-controlled switch; Also comprise the second gate-controlled switch between negative pole and pwm chip being arranged on voltage detecting input, the control end of described second gate-controlled switch is coupled between described tenth resistance and the first gate-controlled switch.This is a kind of under-voltage detection module structure specifically; this is under-voltage, and detection module has delay protection function; when accidental fluctuation appears in voltage detecting input; time voltage transient recovers again normal voltage after declining; pwm chip attonity can be guaranteed, improve the reliability of direct current undervoltage release action.
Further, piezo-resistance is provided with between the both positive and negative polarity of the voltage detecting input of described direct current undervoltage release.Piezo-resistance can when voltage detecting input terminal voltage increases suddenly, and resistance declines rapidly, produces transient high-current, consumes most of energy, avoid circuit burnout below between voltage detecting input both positive and negative polarity.
Further, described magnetic flux coil two ends parallel connection is provided with fly-wheel diode, and the negative electrode of described fly-wheel diode is coupled to the positive pole of voltage detecting input, and its anode is coupled to described dropout gate-controlled switch.Like this when dropout gate-controlled switch disconnects, magnetic flux coil can be discharged by fly-wheel diode, is consumed in time by the energy in coil, can guarantee the impact to dropout gate-controlled switch and circuit of induced current that coil produces like this.
Further, the model of described pwm chip is LTC6992.This is a kind of concrete pwm chip.
A kind of circuit breaker, comprises a kind of direct current undervoltage release of the present invention.
Circuit breaker of the present invention comprises a kind of direct current undervoltage release, is controlled the duty ratio of output pulse signal, export small area analysis and realize low-power consumption under rated operational voltage by the pwm chip that can carry out pulse width control; And control tripping mechanism triggering dropout by pwm chip, the under-voltage detection module and the power port of pwm chip is coupled, under-voltage judgement is carried out by under-voltage detection module, whether the operating voltage controlling to export to pwm chip U1 comes into operation to manipulate pwm chip, compare the under-voltage control mode of analog voltage mode, reliability is high, avoids fuzzy intermediateness to cause the possibility of misoperation, circuit structure is simple, improves release accuracy of action and reliability.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of circuit breaker of the present invention;
Fig. 2 is the principle schematic of direct current undervoltage release of the present invention;
Fig. 3 is the embodiment principle schematic that the present invention is based on LTC6992 chip;
Fig. 4 is that LTC6992 chip pin and peripheral circuit in the present embodiment thereof form schematic diagram;
Wherein: 1, circuit breaker; 11, operating mechanism; 12, contact apparatus; 13, instantaneous trip device; 14, delayed releasing device; 2, direct current undervoltage release; 21, control circuit; 211, power module; 212, under-voltage detection module; 213, dropout operational module; 22, tripping mechanism; 221, magnetic flux coil; 222, actuating mechanism; 23, the positive pole of voltage detecting input; 24, the negative pole of voltage detecting input.
Embodiment
As shown in Figure 1-2, the invention provides a kind of circuit breaker, comprising: the contact apparatus 12 be connected with the both positive and negative polarity of power supply, the instantaneous trip device 13 be coupled with contact apparatus 12 output, delayed releasing device 14; The operating mechanism 11 be coupled with described contact apparatus 12, instantaneous trip device 13 and delayed releasing device 14; Described operating mechanism 11 is also coupled with a kind of direct current undervoltage release 2; Described operating mechanism 11 can receive the control signal of instantaneous trip device 13, delayed releasing device 14 and direct current undervoltage release 2 simultaneously, controls contact apparatus 12 and to carry out point/closing operation.
Direct current undervoltage release 2 of the present invention comprises control circuit 21 and tripping mechanism 22.The actuating mechanism 222 of triggering trip action that tripping mechanism 22 comprises magnetic flux coil 221 and is coupled with magnetic flux coil 221; Described control circuit 21 comprise the under-voltage detection module 212 be connected with the both positive and negative polarity of voltage detecting input, the carried out pulse width control be coupled with under-voltage detection module 212 dropout operational module 213, be connected with dropout operational module 213 provide the power module 211 of operating voltage for dropout operational module 213.Dropout operational module 213 comprises the dropout gate-controlled switch (MOSFET V3) of connecting with the magnetic flux coil 221 of described tripping mechanism 22, be coupled with described MOSFET V3, for the pwm chip U1 (PWM controller chip) of the carried out pulse width control that control MOSFET V3 divides/closes.When direct current undervoltage release 2 detects voltage lower than threshold values, magnetic flux coil 221 no power, direct current undervoltage release 2 action, actuating mechanism 222 trigger mechanism 11 is threaded off, make circuit breaker 1 separating brake, if voltage keeps is lower than threshold values, magnetic flux coil 221 no power of direct current undervoltage release 2, actuating mechanism 222 just can not reset in adhesive, therefore circuit breaker 1 just closes not brake application, when voltage resume being detected, namely voltage is normal, now direct current undervoltage release 2 magnetic flux coil 221 is energized, actuating mechanism 222 adhesive of direct current undervoltage release 2 is driven to reset in the process of being closed a floodgate by breaker body 1.
Circuit breaker of the present invention comprises a kind of direct current undervoltage release, described direct current undervoltage release is due to the MOSFET V3 at magnetic flux coil circuit in series, and dividing/closing by pwm chip U1 control MOSFET V3, the power circuit at such magnetic flux coil place is without the need to judging the height of input voltage, the circuit structure in loop is simple, and reliability is high; The under-voltage detection module and the power port of pwm chip U1 is coupled, under-voltage judgement is carried out by under-voltage detection module, whether the operating voltage controlling to export to pwm chip U1 comes into operation to manipulate pwm chip U1, compare the under-voltage control mode of analog voltage mode, reliability is high, avoid fuzzy intermediateness to cause the possibility of misoperation, improve release accuracy of action and reliability further.Simultaneously, in the heating of maintenance adhesive (i.e. magnetic flux coil under operating conditions long-time galvanization) stage seriously, power is high and easily cause magnetic flux coil burnout, particularly when overtension for electromagnet, the electric current of magnetic flux coil increases, and more easily burns; Therefore, the duty ratio of output pulse signal is controlled by the pwm chip U1 that can carry out pulse width control, when the voltage increases, output pulse signal duty ratio reduces, by the corresponding reduction of the electric current of magnetic flux coil to keep low-power consumption, when the adhesive of magnetic flux coil, small area analysis maintains the attracting state of magnetic flux coil, realizes the low-power consumption needed under rated operational voltage.LTC6992 chip is example below, and the invention will be further described with preferred embodiment by reference to the accompanying drawings, and pwm chip of the present invention is not limited only to LTC6992 chip, but LTC6992 chip is preferred version.
Participate in Fig. 3-4, direct current undervoltage release is from the positive pole 23 (V of voltage detecting input
+) and negative pole 24 (V) power taking of voltage detecting input, comprise power module 211, under-voltage detection module 212 and dropout operational module 213 successively.
Power module 211 has been arranged in series resistance R7 and the second voltage stabilizing didoe D2 between the both positive and negative polarity of voltage detecting input, one end of resistance R7 is connected with the positive pole of voltage detecting input, the other end is connected with the negative pole of the second voltage stabilizing didoe D2, and the positive pole of the second voltage stabilizing didoe D2 is connected with the negative pole of voltage detecting input; The described burning voltage at the second voltage stabilizing didoe D2 negative pole place and the power end (V of pwm chip U1
+) connect, be the operating voltage that described pwm chip U1 exports 5V, guarantee the stable operating voltage of pwm chip U1, promote the reliability of pwm chip.Rectifier diode D6 is also provided with between the second voltage stabilizing didoe D2 and the negative pole of voltage detecting input.Further, piezo-resistance RV1 is provided with between the both positive and negative polarity of voltage detecting input, piezo-resistance RV1 can when voltage detecting input terminal voltage increases suddenly, resistance declines rapidly, transient high-current is produced between voltage detecting input both positive and negative polarity, consume most of energy, avoid circuit burnout below.
Under-voltage detection module 212 is included in the resistance R8 and resistance R9 that are arranged in series between the both positive and negative polarity of voltage detecting input, and with the 3rd voltage stabilizing didoe D3, delay electric capacity C2 that resistance R9 is arranged in parallel, resistance R8 one end is connected with the positive pole of voltage detecting input, the other end is connected with one end of resistance R9, the other end of resistance R9 is connected with the negative pole of voltage detecting input, postpone electric capacity C2 one end to be connected with the negative pole of voltage detecting input, the other end is connected between resistance R8 and resistance R9; The resistance R10 be arranged in series between the both positive and negative polarity of voltage detecting input and the first gate-controlled switch (MOSFET V1), resistance R10 one end is connected with the positive pole of voltage detecting input, the other end is connected with the drain electrode of the first gate-controlled switch, and the source electrode of the first gate-controlled switch is connected with the negative pole of voltage detecting input; The control end of MOSFET V1 is coupled between described resistance R8 and resistance R9; MOSFET V1 has been arranged in parallel the 4th voltage stabilizing didoe D4; The positive pole of the 3rd voltage stabilizing didoe D3 is connected with the negative pole of voltage detecting input, and positive pole is connected between resistance R8 and resistance R9, and the positive pole of the 4th voltage stabilizing didoe D4 is connected with the negative pole of voltage detecting input, and negative pole is connected with the drain electrode of the first gate-controlled switch.Under-voltage detection module 212 also comprises the second gate-controlled switch (MOSFET V2) between negative pole and pwm chip U1 being arranged on voltage detecting input, and the control end of MOSFET V2 is coupled between resistance R10 and MOSFET V1.The source electrode of MOSFET V2 is connected with the negative pole of voltage detecting input, the power end (V of drain electrode and pwm chip U1
+) connect, under-voltage detection module 212 exports to the operating voltage of pwm chip U1 by the control that divides/close of MOSFET V2, realizes the startup/shutoff of pwm chip U1.This under-voltage detection module 212 has delay protection function; when accidental fluctuation appears in voltage detecting input; time voltage transient recovers again normal voltage after declining; pwm chip U1 attonity can be guaranteed; continue the adhesive maintaining magnetic flux coil 221, improve the reliability of direct current undervoltage release action.
Corresponding dropout operational module 213, the resistance R1 be arranged in series between the both positive and negative polarity of voltage detecting input, resistance R2, resistance R3; The first voltage stabilizing didoe D1 is provided with between the negative pole of voltage detecting input and resistance R1, resistance R2 link, resistance R1 one end is connected with the positive pole of voltage detecting input, the other end is connected with resistance R2 one end, the resistance R2 other end is connected with resistance R3 one end, the resistance R3 other end is connected with the negative pole of voltage detecting input, the positive pole of the first voltage stabilizing didoe D1 is connected with the negative pole of voltage detecting input, and negative pole is connected between resistance R1 and resistance R2; Resistance R2, resistance R3 link are coupled to the MOD end of described pwm chip U1; Resistance R4 is provided with between the SET end of pwm chip U1 and the negative pole of voltage detecting input; Power end (the V of pwm chip U1
+) be connected with the operating voltage that described power module 211 exports; Power end (the V of described pwm chip U1
+) be provided with filter capacitor C1 between negative pole with voltage detecting input, and the resistance R5 be arranged in series and resistance R6, resistance R5 and resistance R6 are arranged in parallel with filter capacitor C1, its link is coupled to the DIV end of described pwm chip U1; The OUT end of pwm chip U1 is provided with current-limiting resistance R11 with between described MOSFET V3.Further, magnetic flux coil 221 two ends parallel connection is provided with sustained diode 5, and the negative electrode of sustained diode 5 is coupled to the positive pole of voltage detecting input, and its anode is coupled to described MOSFET V3.Like this when MOSFET V3 disconnects, magnetic flux coil 221 can be discharged by sustained diode 5, is consumed in time by the energy in coil, can guarantee the impact to MOSFET and circuit of induced current that coil produces like this.
Resistance R1 in dropout operational module 213, resistance R2, resistance R3 are that pattern arranges resistance, and the first voltage stabilizing didoe D1 is in fact with the resistance connection in series-parallel of resistance R2, resistance R3 composition, constant to guarantee the pressure reduction of resistance R2, resistance R3.And the MOD end of pwm chip U1 is coupled between resistance R2, resistance R3, under the prerequisite that resistance R2, resistance R3 resistance are fixed, voltage MOD being held when detecting voltage and being greater than certain value also keeps constant, to guarantee the stability of model selection.Resistance R5 and resistance R6 is divider resistance, same, due to stable operating voltage, when resistance R5 and resistance R6 resistance certain, be coupled to the pwm chip U1 between them DIV end voltage be also constant.
Present embodiment controls the work of pwm chip U1 by under-voltage detection module 212 and closes with the accurate protection act realizing release.When the voltage of voltage detecting input is normal rating operating voltage, the voltage of divider resistance R9 end (i.e. the gate pole of V1) of under-voltage detection module 212 is the conducting voltage of MOSFET V1, V1 conducting, the source voltage of V1 is low, namely the gate pole conducting voltage of MOSFET V2 is low, then MOSFET V2 ends, now the voltage of the power end of pwm chip U1 is the operating voltage 5V that described power module exports, the drain voltage of MOSFET V2 is also 5V, pwm chip U1 normally works, the OUT of pwm chip U1 holds the Continuity signal of output mos FET V3, MOSFET V3 conducting, tripping mechanism 22 attracting state, when the voltage of voltage detecting input is lower than set action voltage, the voltage that divider resistance R9 holds is lower than the conducting voltage of V1, V1 ends, the voltage stabilization of the 4th voltage stabilizing didoe D4 is at 5V, namely the gate pole conducting voltage of MOSFETV2 is 5V, V2 conducting, the source voltage of V2 is low, now because the power end of pwm chip U1 is connected voltage also for low with the drain electrode of MOSFET V2, then pwm chip U1 quits work, magnetic flux coil 221 discharges, actuating mechanism 222 action, and band pneumatic operating mechanism 11 controls contact apparatus 12 and performs disjunction operation.
After in dropout operational module 213, elected mould-fixed arranges resistance (R4/R5/R6) and divider resistance (R1/R2/R3); during the change in voltage of voltage detecting input; the pulsewidth of pwm chip LTC6992 output pulse signal also can corresponding change; when the voltage increases; output pulse signal duty ratio reduces; by the corresponding reduction of the electric current of magnetic flux coil; to keep low-power consumption; under rated operational voltage, realize the low-power consumption needed, magnetic flux coil also can be protected not burnt by big current simultaneously.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a direct current undervoltage release, comprises tripping mechanism and control circuit, it is characterized in that,
Described control circuit comprise the under-voltage detection module be connected with voltage detecting input, the carried out pulse width control be coupled with under-voltage detection module dropout operational module, be connected with dropout operational module provide the power module of operating voltage for dropout operational module;
Described dropout operational module comprise be connected with described tripping mechanism dropout gate-controlled switch, be coupled with described dropout gate-controlled switch, for controlling the pwm chip that dropout gate-controlled switch divides/closes;
Described under-voltage detection module comprises the 8th resistance, the 9th resistance and postpones electric capacity, 8th resistance one end is connected with the positive pole of voltage detecting input, the other end is connected with one end of the 9th resistance, the other end of the 9th resistance is connected with the negative pole of voltage detecting input, postpone electric capacity one end to be connected with the negative pole of voltage detecting input, the other end is connected between the 8th resistance and the 9th resistance;
Also comprise the tenth resistance and the first gate-controlled switch, tenth resistance one end is connected with the positive pole of voltage detecting input, the other end is connected with the drain electrode of the first gate-controlled switch, the source electrode of the first gate-controlled switch is connected with the negative pole of voltage detecting input, and the control end of described first gate-controlled switch is coupled between described 8th resistance and the 9th resistance; Also comprise the second gate-controlled switch between negative pole and pwm chip being arranged on voltage detecting input, the control end of described second gate-controlled switch is coupled between described tenth resistance and the first gate-controlled switch,
The source electrode of described second gate-controlled switch is connected with the negative pole of voltage detecting input, and drain electrode is connected with the power end of pwm chip.
2. a kind of direct current undervoltage release as claimed in claim 1, is characterized in that, described tripping mechanism comprises the actuating mechanism of magnetic flux coil and the triggering trip action with magnetic flux coil coupling.
3. a kind of direct current undervoltage release as claimed in claim 1, is characterized in that, is in series with current-limiting resistance between the output of described pwm chip and described dropout gate-controlled switch.
4. a kind of direct current undervoltage release as claimed in claim 1, is characterized in that, described dropout operational module also comprises:
First resistance, the second resistance, the 3rd resistance and the first voltage stabilizing didoe, first resistance one end is connected with the positive pole of voltage detecting input, the other end is connected with second resistance one end, the second resistance other end is connected with the 3rd resistance one end, the 3rd resistance other end is connected with the negative pole of voltage detecting input, the positive pole of the first voltage stabilizing didoe is connected with the negative pole of voltage detecting input, and negative pole is connected between the first resistance and the second resistance;
Described second resistance, the 3rd resistance link are coupled to the MOD end of described pwm chip;
Be provided with the 4th resistance between the SET end of described pwm chip and the negative pole of voltage detecting input, the operating voltage that power end exports with described power module is connected;
The power end of described pwm chip is followed between the negative pole of voltage detecting input and is provided with filter capacitor, and the 5th resistance be arranged in series and the 6th resistance, described 5th resistance and the 6th resistance are arranged in parallel with filter capacitor, and its link is coupled to the DIV end of described pwm chip;
The OUT end of described pwm chip is provided with current-limiting resistance with between described dropout gate-controlled switch.
5. a kind of direct current undervoltage release as claimed in claim 1, it is characterized in that, described power module has been arranged in series the 7th resistance and the second voltage stabilizing didoe between the both positive and negative polarity of voltage detecting input, one end of 7th resistance is connected with the positive pole of voltage detecting input, the other end is connected with the negative pole of the second voltage stabilizing didoe, and the positive pole of the second voltage stabilizing didoe is connected with the negative pole of voltage detecting input; The burning voltage at the negative pole place of the second voltage stabilizing didoe is described pwm chip output services voltage.
6. a kind of direct current undervoltage release as claimed in claim 1, is characterized in that, described under-voltage detection module also comprises: the 3rd voltage stabilizing didoe arranged with the 9th resistor coupled in parallel; The 4th voltage stabilizing didoe be arranged in parallel with described first gate-controlled switch; The positive pole of the 3rd voltage stabilizing didoe is connected with the negative pole of voltage detecting input, and negative pole is connected between the 8th resistance and the 9th resistance; The positive pole of the 4th voltage stabilizing didoe is connected with the negative pole of voltage detecting input, and negative pole is connected with the drain electrode of the first gate-controlled switch.
7. a kind of direct current undervoltage release as claimed in claim 1, is characterized in that, is provided with piezo-resistance between the both positive and negative polarity of the voltage detecting input of described direct current undervoltage release.
8. a kind of direct current undervoltage release as claimed in claim 2, it is characterized in that, described magnetic flux coil two ends parallel connection is provided with fly-wheel diode, and the negative electrode of described fly-wheel diode is coupled to the positive pole of voltage detecting input, and its anode is coupled to described dropout gate-controlled switch.
9. a kind of direct current undervoltage release as claimed in claim 1, is characterized in that, the model of described pwm chip is LTC6992.
10. a circuit breaker, is characterized in that, comprise as arbitrary in claim 1 ~ 9 as described in a kind of direct current undervoltage release.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210277426.2A CN102790375B (en) | 2012-08-06 | 2012-08-06 | Direct current undervoltage release and circuit breaker |
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|---|---|---|---|
| CN201210277426.2A CN102790375B (en) | 2012-08-06 | 2012-08-06 | Direct current undervoltage release and circuit breaker |
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| CN102790375B true CN102790375B (en) | 2015-04-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210401058A1 (en) * | 2018-09-29 | 2021-12-30 | Shenzhen First Union Technology Co., Ltd. | Output control circuit |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6168342B2 (en) * | 2013-03-29 | 2017-07-26 | パナソニックＩｐマネジメント株式会社 | Circuit breaker overvoltage / undervoltage trip device |
| CN103500982A (en) * | 2013-09-30 | 2014-01-08 | 长城电器集团有限公司 | Under-voltage tripper circuit for miniature circuit breaker |
| CN104135691B (en) * | 2014-08-14 | 2017-12-22 | 广州创维平面显示科技有限公司 | MCU reset control circuits and television set |
| CN104241014B (en) * | 2014-09-13 | 2016-02-24 | 安徽中电兴发与鑫龙科技股份有限公司 | Vacuum circuit-breaker separating brake, closing coil protection controller and method |
| CN105450017B (en) * | 2015-11-26 | 2018-06-05 | 同济大学 | Time adjustable anti-interference under-voltage protection on-off circuit |
| CN114530837B (en) * | 2022-03-09 | 2023-07-28 | 沈阳工程学院 | Electric power automation cubical switchboard |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118197Y (en) * | 2007-11-08 | 2008-09-17 | 德力西电气有限公司 | Alternating current voltage under-voltage releasing equipment control circuit |
| CN201498974U (en) * | 2009-07-21 | 2010-06-02 | 常熟开关制造有限公司(原常熟开关厂） | Under-voltage trip circuit |
| CN102097778A (en) * | 2011-02-11 | 2011-06-15 | 上海诺雅克电气有限公司 | Energy-saving undervoltage/overvoltage protective device |
| CN202817699U (en) * | 2012-08-06 | 2013-03-20 | 上海诺雅克电气有限公司 | DC undervoltage tripping device and breaker |
-
2012
- 2012-08-06 CN CN201210277426.2A patent/CN102790375B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118197Y (en) * | 2007-11-08 | 2008-09-17 | 德力西电气有限公司 | Alternating current voltage under-voltage releasing equipment control circuit |
| CN201498974U (en) * | 2009-07-21 | 2010-06-02 | 常熟开关制造有限公司(原常熟开关厂） | Under-voltage trip circuit |
| CN102097778A (en) * | 2011-02-11 | 2011-06-15 | 上海诺雅克电气有限公司 | Energy-saving undervoltage/overvoltage protective device |
| CN202817699U (en) * | 2012-08-06 | 2013-03-20 | 上海诺雅克电气有限公司 | DC undervoltage tripping device and breaker |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210401058A1 (en) * | 2018-09-29 | 2021-12-30 | Shenzhen First Union Technology Co., Ltd. | Output control circuit |
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Application publication date: 20121121 Assignee: ZHEJIANG CHINT ELECTRICS Co.,Ltd. Assignor: SHANGHAI NOARK ELECTRIC Co.,Ltd. Contract record no.: X2021330000593 Denomination of invention: DC undervoltage release and circuit breaker Granted publication date: 20150422 License type: Common License Record date: 20211025 |
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