CN201838985U - A-leakage circuit - Google Patents
A-leakage circuit Download PDFInfo
- Publication number
- CN201838985U CN201838985U CN2010205924427U CN201020592442U CN201838985U CN 201838985 U CN201838985 U CN 201838985U CN 2010205924427 U CN2010205924427 U CN 2010205924427U CN 201020592442 U CN201020592442 U CN 201020592442U CN 201838985 U CN201838985 U CN 201838985U
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- comparator
- resistance
- capacitor
- diode
- triode
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Abstract
The utility model discloses an A-leakage circuit, which comprises a zero-sequence current transformer, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first comparator, a second comparator, a first diode, a second diode, a DSP (digital signal processing) chip, a triode and a trip. One end of the zero-sequence current transformer is connected with the first capacitor, the other end of the zero-sequence current transformer is connected with the second resistor, the first capacitor is connected with the first comparator, the first comparator is connected with the second comparator and the DSP chip, the second comparator is connected with the third resistor and the fourth resistor, the fourth resistor is connected with triode through the first diode, the second capacitor is connected with the third resistor, and the triode is connected with the second diode, the third capacitor and the trip. The A-leakage circuit is capable of the trip and guaranteeing precision.
Description
Technical field
The utility model relates to a kind of leakage circuit, particularly a kind of A type leakage circuit.
Background technology
Existing leakage circuit have only overload the moving protection of short circuit and wink, the also right and wrong A type of leaking electricity, can not protect release, and existing electric capacity and electricity coupling difficulty, precision is difficult to be guaranteed.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of A type leakage circuit, and it can be protected release and guarantee precision.
For solveing the technical problem, the utility model provides a kind of A type leakage circuit, it is characterized in that, it comprises zero sequence current mutual inductor, first electric capacity, second electric capacity, the 3rd electric capacity, first resistance, second resistance, the 3rd resistance, the 4th resistance, first comparator, second comparator, first diode, second diode, dsp chip, triode and release, one end of zero sequence current mutual inductor is connected with first electric capacity, the other end of zero sequence current mutual inductor is connected with second resistance, first electric capacity is connected with first comparator, first comparator and second comparator, dsp chip connects, second comparator and the 3rd resistance, the 4th resistance connects, the 4th resistance is connected with triode by first diode, second electric capacity is connected with the 3rd resistance, the triode and second diode, the 3rd electric capacity is connected with release.
Preferably, described first resistance and second resistance connect to form bleeder circuit.Preferably, described dsp chip is connected with triode.
Positive progressive effect of the present utility model is: the utility model A type leakage circuit can be protected release.
Description of drawings
Fig. 1 is the circuit diagram of the utility model one embodiment.
Embodiment
Lift a preferred embodiment below, and come the clearer the utility model that intactly illustrates in conjunction with the accompanying drawings.
As shown in Figure 1, the utility model A type leakage circuit comprises zero sequence current mutual inductor ZCT, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first comparator U1B, the second comparator U1D, the first diode V1, the second diode V2, DSP(Digital Signal Processor, digital signal processor) chip, triode Q1 and release, the end (ZCT_1) of zero sequence current mutual inductor ZCT is connected with first capacitor C 1, the other end of zero sequence current mutual inductor ZCT (ZCT_2) is connected with second resistance R 2, first resistance R 1 and second resistance R 2 connect to form bleeder circuit, first capacitor C 1 is connected with the first comparator U1B, the first comparator U1B and the second comparator U1D, dsp chip connects, the second comparator U1D and the 3rd resistance R 3, the 4th resistance R 4 connects, the 4th resistance R 4 is connected with triode Q1 by the first diode V1, dsp chip is connected with triode Q1, second capacitor C 2 is connected with the 3rd resistance R 3, the triode Q1 and the second diode V2, the 3rd capacitor C 3 is connected with release.
The utility model A type leakage circuit comprises that the hardware dropout is handled and the software dropout is handled, and adopts two kinds of modes of software and hardware to realize, can guarantee precision.
The operation principle that the hardware dropout is handled is as follows: as electric leakage signal process zero sequence current mutual inductor ZCT, the effect of first capacitor C 1 is that stopping direct current passes interchange, and for the first comparator U1B provides reference voltage, the effect of the first comparator U1B has been the effect that isolation is followed; The output of the first comparator U1B connects the positive input of the second comparator U1D; input signal as the second comparator U1D; the negative-phase input of the second comparator U1D meets the PWM(Pulse Width Modulation of dsp chip after through the 3rd resistance R 3 and second capacitor C 2; pulse-width modulation) port; the 3rd resistance R 3 and second capacitor C 2 are formed the RC filter circuit; minimizing is disturbed dsp chip; level by dsp chip real time altering PWM port; thereby compare with the input signal of the second comparator U1D; control the conducting of triode and end (the 4th resistance R 4 plays isolation with diode V1) by the output of the second comparator U1D at last; thereby control release action be failure to actuate; so both realized the electric leakage of A type; the 3rd capacitor C 3 plays the energy storage effect, and the effect of the second diode V2 is the protection release.
The operation principle that the software dropout is handled is as follows: as electric leakage signal process zero sequence current mutual inductor ZCT, the effect of first capacitor C 1 is that stopping direct current passes interchange, and for the first comparator U1B provides reference voltage, the effect of the first comparator U1B has been the effect that isolation is followed; The output of the first comparator U1B enters the AD thief hatch of dsp chip, by analog sampling, calculate the sampled value of electric leakage signal in real time, compare with inner setting value by sampled value at last, knot is relatively crossed conducting that the height of exporting behind the I/O by dsp chip controls triode and is ended, thereby the action of control release be failure to actuate, so both realized A type electric leakage.
Though more than described embodiment of the present utility model, but those skilled in the art is to be understood that, these only illustrate, and under the prerequisite that does not deviate from principle of the present utility model and essence, can make numerous variations or modification to these execution modes.Therefore, protection range of the present utility model is limited by appended claims.
Claims (3)
1. A type leakage circuit, it is characterized in that, it comprises zero sequence current mutual inductor, first electric capacity, second electric capacity, the 3rd electric capacity, first resistance, second resistance, the 3rd resistance, the 4th resistance, first comparator, second comparator, first diode, second diode, dsp chip, triode and release, one end of zero sequence current mutual inductor is connected with first electric capacity, the other end of zero sequence current mutual inductor is connected with second resistance, first electric capacity is connected with first comparator, first comparator and second comparator, dsp chip connects, second comparator and the 3rd resistance, the 4th resistance connects, the 4th resistance is connected with triode by first diode, second electric capacity is connected with the 3rd resistance, the triode and second diode, the 3rd electric capacity is connected with release.
2. A type leakage circuit as claimed in claim 1 is characterized in that described first resistance and second resistance connect to form bleeder circuit.
3. A type leakage circuit as claimed in claim 1 is characterized in that described dsp chip is connected with triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205924427U CN201838985U (en) | 2010-11-04 | 2010-11-04 | A-leakage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205924427U CN201838985U (en) | 2010-11-04 | 2010-11-04 | A-leakage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201838985U true CN201838985U (en) | 2011-05-18 |
Family
ID=44009085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205924427U Expired - Lifetime CN201838985U (en) | 2010-11-04 | 2010-11-04 | A-leakage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201838985U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953555A (en) * | 2015-06-19 | 2015-09-30 | 威睿电动汽车技术（苏州）有限公司 | Over-voltage and over-current protection system and over-voltage and over-current protection method for battery |
-
2010
- 2010-11-04 CN CN2010205924427U patent/CN201838985U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953555A (en) * | 2015-06-19 | 2015-09-30 | 威睿电动汽车技术（苏州）有限公司 | Over-voltage and over-current protection system and over-voltage and over-current protection method for battery |
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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: Shanghai Chaoan Electrical Co., Ltd. Assignor: Zhejiang Gacia Electrical Appliances Co., Ltd. Contract record no.: 2012330000250 Denomination of utility model: A-leakage circuit Granted publication date: 20110518 License type: Exclusive License Record date: 20120509 |
|
| C56 | Change in the name or address of the patentee |
Owner name: GACIA ELECTRICAL APPLIANCE CO., LTD. Free format text: FORMER NAME: ZHEJIANG GACIA ELECTRICAL APPLIANCES CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Yueqing East Street North Baixiang Town Industrial Zone 325603 Bai TA Wang Zhejiang province Wenzhou City No. 545 Patentee after: GACIA ELECTRICAL APPLIANCE CO., LTD. Address before: Yueqing East Street North Baixiang Town Industrial Zone 325603 Bai TA Wang Zhejiang province Wenzhou City No. 545 Patentee before: Zhejiang Gacia Electrical Appliances Co., Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Chaoan Electrical Co., Ltd. Assignor: Zhejiang Gacia Electrical Appliances Co., Ltd. Contract record no.: 2012330000250 Denomination of utility model: A-leakage circuit Granted publication date: 20110518 License type: Exclusive License Record date: 20120509 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Yueqing East Street North Baixiang Town Industrial Zone 325603 Bai TA Wang Zhejiang province Wenzhou City No. 545 Patentee after: Garcia electronic appliance Limited by Share Ltd Address before: Yueqing East Street North Baixiang Town Industrial Zone 325603 Bai TA Wang Zhejiang province Wenzhou City No. 545 Patentee before: GACIA ELECTRICAL APPLIANCE CO., LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110518 |