CN103166177A - Leakage blocking protective circuit - Google Patents
Leakage blocking protective circuit Download PDFInfo
- Publication number
- CN103166177A CN103166177A CN2011104174136A CN201110417413A CN103166177A CN 103166177 A CN103166177 A CN 103166177A CN 2011104174136 A CN2011104174136 A CN 2011104174136A CN 201110417413 A CN201110417413 A CN 201110417413A CN 103166177 A CN103166177 A CN 103166177A
- Authority
- CN
- China
- Prior art keywords
- module
- circuit
- resistance
- comparison module
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000903 blocking effect Effects 0.000 title abstract 9
- 230000001681 protective effect Effects 0.000 title abstract 4
- 238000009413 insulation Methods 0.000 claims abstract description 51
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 230000005611 electricity Effects 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 47
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to a leakage blocking protective circuit. The leakage blocking protective circuit comprises a detection comparison module (A), a detection time-delay module (B), a blocking circuit module (C) and a signal output module (D), wherein an input end of the detection comparison module (A) is connected with a peripheral detected equipment insulation resistor so as to detect insulation performance of the detected equipment insulation resistor, comparing a detected equipment insulation resistor value and an insulation critical value and then outputting the detected equipment insulation resistor value. The detection time-delay module (B) is connected with an output end of the detection comparison module (A) so as to prolong detection time of the detection comparison module (A). The blocking circuit module (C) is connected with the output end of the detection comparison module (A) and feeds back output signals of the detection comparison module to the input end of the detection comparison module (A) to form blocking. The signal output module (D) is connected with the detection time-delay module (B) so as to output passive contact signals to ban power transmission to a major loop of the detected equipment and to achieve leakage of electricity blocking protection of the detected equipment. The leakage blocking protective circuit can output the passive contact blocking signals and guarantee security of power supply.
Description
Technical field
The present invention relates to a kind of electric device, especially relate to a kind of electricity leakage locking protection circuit of electric equipment.
Background technology
Under coal mine, condition of work is special, and humid environment has very high requirement to the insulation property of electric equipment and cable.According to safety regulations in coal mine; the control appliance of low-tension motor and low voltage feeder line should possess the leakage latching protection device; therefore before giving the energising of mineral electrical apparatus major loop; need to the insulation property of equipment be detected; in case insulation property are reduced to below setting; to forbid to the major loop power transmission, realize the leakage latching protection function to equipment.
In existing electricity leakage locking protection circuit, one class is by adopting the digital circuits such as CPU control unit (such as single-chip microcomputer) (for example: patent No. ZL200920144489.4) to consist of, this kind method need to be programmed to the CPU control unit, and circuit structure is complicated, and cost is higher; Also having a class is directly to adopt comparator to consist of testing circuit, but the sort circuit reliability is not high, easily misoperation, poor anti jamming capability.
Summary of the invention
The object of the invention be to provide a kind of easy to use, antijamming capability strong, make simple, cost is low, the insulation property that can detect electric equipment; can export the electricity leakage locking protection circuit of passive contact block signal, guarantee the power supply safety of electric equipment.
Electricity leakage locking protection circuit provided by the invention comprises and detects comparison module A, detection time delay module B, exclusive circuit module C and signal output module D; Wherein, the input that detects comparison module A is connected with peripheral equipment under test insulation resistance, for detection of the insulation property of equipment under test insulation resistance, equipment under test insulating resistance value and insulation critical value is exported more afterwards; Detect time delay module B and be connected with the output that detects comparison module A, be used for extending the detection time of detecting comparison module A; Exclusive circuit module C is connected with the output that detects comparison module A, the output signal that detects comparison module A is fed back to the input that detects comparison module A, forms locking; Signal output module D is connected with detection time delay module B, is used for exporting passive contact signal, to forbid the major loop power transmission to equipment under test, realizes the leakage latching protection to equipment under test.
Described detection comparison module A comprises testing circuit, input filter circuit and comparison output circuit; Described testing circuit comprises DC power supply and divider resistance, and divider resistance and equipment under test insulation resistance are serially connected with DC power supply, adopts the mode of electric resistance partial pressure that insulating resistance value is converted to voltage signal; Described input filter circuit adopts the RC filter circuit; Described relatively output circuit adopts operational amplifier and resistance to consist of.
Divider resistance in described testing circuit comprises a variable resistor.
The feedback circuit of described exclusive circuit module C for adopting triode and resistance to consist of, exclusive circuit module C will detect the output signal of comparison module A by the input of resistance feedback to detection comparison module A, form locking.
Described detection time delay module B adopts resistance and electric capacity to consist of, and by to the discharging and recharging of electric capacity, realizes extending detection time.
Described signal output module D comprises the comparison holding circuit that signal is overturn and keep and the outputting circuit for relay of controlling the passive contact signal of output; Described relatively holding circuit input is connected with the detection delay circuit, and output is connected with outputting circuit for relay.
Described relatively holding circuit adopts operational amplifier and resistance to consist of; Described outputting circuit for relay adopts resistance, triode and relay to consist of.
Described equipment under test insulation resistance is the insulation resistance of motor, speed regulating device or Transformer Winding.
Described equipment under test insulation resistance is the insulation resistance of switched reluctance machines; the switched reluctance machines shell is connected with ground; detecting comparison module is connected with negative busbar in switched reluctance machines by serial connection relay normally-closed contact, diode; relay normally open contact is connected in the contactor coil that powers on, and switched reluctance machines is carried out latch-up protection.
Electricity leakage locking protection circuit provided by the invention detects the insulation property that comparison module detects the equipment under test insulation resistance; By being connected the exclusive circuit module with input at the output that detects comparison module, the output signal that detects comparison module is fed back to the input that detects comparison module, form locking; Block signal is by detecting comparison module and the acting in conjunction of exclusive circuit module output; Signal output module converts block signal to passive contact signal and exports, and to forbid the major loop power transmission to equipment under test, realizes the leakage latching protection to equipment under test; Whole electricity leakage locking protection circuit, can be exported passive contact block signal at the insulation property that easy to use, antijamming capability is strong, it is simple to make, cost is low, can detect electric equipment, guarantees the power supply safety of electric equipment; Further, by adopting the divider resistance that includes divider resistance detecting comparison module, make the electricity leakage locking protection circuit can be according to insulating requirements adjustment insulation critical value.
Description of drawings
Fig. 1 is the connection diagram of electricity leakage locking protection circuit of the present invention;
Fig. 2 is the circuit structure diagram of electricity leakage locking protection circuit of the present invention;
Fig. 3 is the circuit structure diagram that electricity leakage locking protection circuit of the present invention is applied to magnetic resistance switch speed-adjustable.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Electricity leakage locking protection circuit provided by the invention as shown in Figure 1, comprises and detects comparison module A, detection time delay module B, exclusive circuit module C and signal output module D; Wherein, the input that detects comparison module A is connected with peripheral equipment under test insulation resistance, for detection of the insulation property of equipment under test insulation resistance, equipment under test insulating resistance value and insulation critical value is exported more afterwards; Detect time delay module B and be connected with the output that detects comparison module A, be used for extending the detection time of detecting comparison module A; Exclusive circuit module C is connected with the output that detects comparison module A, the output signal that detects comparison module A is fed back to the input that detects comparison module A, forms locking; Signal output module D is connected with detection time delay module B, is used for exporting passive contact signal, to forbid the major loop power transmission to equipment under test, realizes the leakage latching protection to equipment under test, prevents misoperation, has improved reliability.
Detect comparison module A and comprise testing circuit, input filter circuit and comparison output circuit; Testing circuit comprises DC power supply and divider resistance, and divider resistance and equipment under test insulation resistance are serially connected with DC power supply, adopts the mode of electric resistance partial pressure that insulating resistance value is converted to voltage signal; Input filter circuit adopts the RC filter circuit; Relatively output circuit adopts operational amplifier and resistance to consist of.
Divider resistance in testing circuit can comprise a variable resistor, can be according to insulating requirements adjustment insulation critical value with realization.
As shown in Figure 2, detect that in comparison module A, testing circuit comprises+the 24V DC power supply, resistance R 1 and a variable resistor potentiometer RP1, wherein resistance R 1, potentiometer RP1, equipment under test insulation resistance are serially connected with this+the 24V DC power supply, adopt the mode of electric resistance partial pressure that insulating resistance value is converted to voltage signal, be connected in series relay K 1 normally-closed contact, diode VD1 between insulation resistance and test point X1; Detect the RC filter circuit that in comparison module A, the input filter circuit employing is made of resistance R 2, R3, filter capacitor C2, C3; Detect and compare output circuit employing operational amplifier U1A in comparison module A, resistance R 4, R5 consist of.Concrete annexation is: 8 pin of operational amplifier U1A connect+the 24V DC power supply, 4 pin of operational amplifier U1A connect power supply ground, power supply ground is with shell ground connection, + 24V DC power supply and resistance R 4, R5 are connected in series, resistance R 5 partial pressure value outputs are connected with positive input 3 pin of operational amplifier U1A, + 24V DC power supply is connected in series to reverse input end 2 pin of operational amplifier fortune U1A by resistance R 1, potentiometer RP1, resistance R 2, R3, filter capacitor C2, C3 and resistance R 2, R3 consist of the input filter circuit of reverse input end 2 pin of operational amplifier U1A.
An application of the present invention is that this electricity leakage locking protection circuit is used for magnetic resistance switch speed-adjustable, and this moment, equipment under test was switched reluctance machines, and the equipment under test insulation resistance is the insulation resistance of switched reluctance machines.As shown in Figure 3, the switched reluctance machines shell is connected with ground, test point X1 is connected with the interior negative busbar of switched reluctance machines device by relay K 1 contact, diode VD1, like this+24V direct voltage will produce partial pressure value at the insulation resistance of switched reluctance machines by the fly-wheel diode in the switch magnetic resistance controller main circuit, the partial pressure value of insulation resistance will be applied to reverse input end 2 pin of operational amplifier U1A.
The feedback circuit of exclusive circuit module C for adopting triode and resistance to consist of, exclusive circuit module C will detect the output signal of comparison module A by the input of resistance feedback to detection comparison module A, form locking.
As shown in Figure 2, the feedback circuit of exclusive circuit module C for adopting triode VT1, resistance R 6, R7, R8 to consist of, 2 pin that 1 pin of resistance R 6 is connected to output 1 pin, the resistance R 6 of the operational amplifier U1A that detects comparison module A are connected with 1 pin of R7,2 pin of resistance R 7 are connected with 1 pin of R8, the emitter e of the 2 pin connecting triode VT1 of R8, the collector electrode c of triode VT1 is connected with 1 pin of the potentiometer RP1 that detects comparison module A, the collector electrode b of triode VT1 is connected with 1 pin of resistance R 8, and 1 pin of R7 is connected on reseting terminal RES.The signal that detects comparison module A output is connected in series to power supply ground by resistance R 6, R7, R8; the partial pressure value of resistance R 8 is applied to the collector electrode b of triode VT1; control the conducting of triode VT1; thereby the output signal that will detect comparison module A feeds back to the input that detects comparison module A; form block signal; when reseting terminal RES and power supply ground short circuit, can control triode VT1 cut-off, the latch-up protection of relieving circuit.
Detect time delay module B and adopt resistance and electric capacity to consist of, by to the discharging and recharging of electric capacity, to realize extending detection time.
As shown in Figure 2, detect time delay module B and comprise diode V1, resistance R 17, R10, electrochemical capacitor C1, anodal 1 pin with R17 of diode V1 is parallel-connected to output 1 pin of operational amplifier U1A, 2 pin of diode V1 negative pole and R17 are parallel-connected to 1 pin of resistance R 10, the positive pole of electrochemical capacitor C1 with+the 24V power supply is connected, negative pole is connected with 2 pin of resistance R 10, by discharging and recharging of electrochemical capacitor C1, can realize extending detection time.
Signal output module D comprises comparison holding circuit and outputting circuit for relay; Described relatively holding circuit input is connected with the detection delay circuit, and output is connected with outputting circuit for relay.Relatively the holding circuit effect is that signal overturns and keeps, and the outputting circuit for relay effect is to control the passive contact signal of output.
Relatively holding circuit adopts operational amplifier and resistance to consist of; Described outputting circuit for relay adopts resistance, triode and relay to consist of, and can export passive contact signal.
As shown in Figure 2, compare holding circuit in signal output module D and comprise resistance R 11, R12, R13, operational amplifier U2A, signal output module D repeat circuit output circuit comprises relay K 1, diode V2, resistance R 14, R15 and triode VT2.reverse input end 6 pin of operational amplifier U2A are connected with 2 pin of resistance R 10, 1 pin of R11 is connected with+24V DC power supply, 2 pin of R11 are connected with positive input 5 pin of operational amplifier U2A, 1 pin of resistance R 12 is connected with 2 pin of R11,2 pin of resistance R 12 are connected with power supply ground, 1 pin of resistance R 13 is connected with output 7 pin of operational amplifier U2A, and 2 pin of resistance R 13 are connected with 1 pin of resistance R 12, output 7 pin of 1 pin concatenation operation amplifier U2A of resistance R 14, 2 pin of resistance R 14 are connected with triode VT2 base stage b, 1 pin of resistance R 15 is connected with triode VT2 base stage b, 2 pin of resistance R 15 are connected with triode VT2 emitter e, triode VT2 emitter e is connected with power supply ground, the coil electrode of relay K 1 is connected with+24V power supply, negative pole is connected with triode VT2 collector electrode c, diode V2 is anodal to be connected with the coil negative pole of relay K 1, diode V2 negative pole is connected with+24V DC power supply, relay K 1 has normally opened contact and normally-closed contact, relay K 1 normally opened contact is connected in electric contactor KM1 coil, equipment under test is carried out latch-up protection.
The equipment under test insulation resistance that the present invention can be used for testing can be the insulation resistance of motor, speed regulating device or Transformer Winding.
The present invention goes for the insulation property of electric equipment and cable are had the operational environment of very high requirement, under the coal mine as humid environment, and the mine of the large easy dewfall of day and night temperature, oil field.
In sum, electricity leakage locking protection circuit provided by the invention detects the insulation property that comparison module detects the equipment under test insulation resistance; By being connected the exclusive circuit module with input at the output that detects comparison module, the output signal that detects comparison module A is fed back to the input that detects comparison module, form locking; Block signal is by detecting comparison module and the acting in conjunction of exclusive circuit module output; Signal output module converts block signal to passive contact signal and exports, and to forbid the major loop power transmission to equipment under test, realizes the leakage latching protection to equipment under test; Whole electricity leakage locking protection circuit, can be exported passive contact block signal at the insulation property that easy to use, antijamming capability is strong, it is simple to make, cost is low, can detect electric equipment, guarantees the power supply safety of electric equipment; Further, by adopting the divider resistance that includes divider resistance detecting comparison module A, make the electricity leakage locking protection circuit can be according to insulating requirements adjustment insulation critical value.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. an electricity leakage locking protection circuit, comprise and detect comparison module (A), detection time delay module (B), exclusive circuit module (C) and signal output module (D); It is characterized in that, the input that detects comparison module (A) is connected with peripheral equipment under test insulation resistance, for detection of the insulation property of equipment under test insulation resistance, equipment under test insulating resistance value and insulation critical value is exported more afterwards; Detect time delay module (B) and be connected with the output that detects comparison module (A), be used for extending the detection time of detecting comparison module (A); Exclusive circuit module (C) is connected with the output that detects comparison module (A), and the output signal that will detect comparison module (A) feeds back to the input that detects comparison module (A), forms locking; Signal output module (D) is connected with detection time delay module (B), is used for exporting passive contact signal, to forbid the major loop power transmission to equipment under test, realizes the leakage latching protection to equipment under test.
2. electricity leakage locking protection circuit according to claim 1, is characterized in that, described detection comparison module (A) comprises testing circuit, input filter circuit and comparison output circuit; Described testing circuit comprises DC power supply and divider resistance, and divider resistance and equipment under test insulation resistance are serially connected with DC power supply, adopts the mode of electric resistance partial pressure that insulating resistance value is converted to voltage signal; Described input filter circuit adopts the RC filter circuit; Described relatively output circuit adopts operational amplifier and resistance to consist of.
3. electricity leakage locking protection circuit according to claim 2, is characterized in that, the divider resistance of described testing circuit comprises a variable resistor.
4. electricity leakage locking protection circuit according to claim 1; it is characterized in that; the feedback circuit of described exclusive circuit module (C) for adopting triode and resistance to consist of; exclusive circuit module (C) will detect the output signal of comparison module (A) by the input of resistance feedback to detection comparison module (A), form locking.
5. electricity leakage locking protection circuit according to claim 1, is characterized in that, described detection time delay module (B) adopts resistance and electric capacity to consist of, and by to the discharging and recharging of electric capacity, realizes extending detection time.
6. electricity leakage locking protection circuit according to claim 1, is characterized in that, described signal output module (D) comprises the comparison holding circuit that signal is overturn and keep and the outputting circuit for relay of controlling the passive contact signal of output; Described relatively holding circuit input is connected with the detection delay circuit, and output is connected with outputting circuit for relay.
7. electricity leakage locking protection circuit according to claim 6, is characterized in that, described relatively holding circuit adopts operational amplifier and resistance to consist of; Described outputting circuit for relay adopts resistance, triode and relay to consist of.
8. electricity leakage locking protection circuit according to claim 1, is characterized in that, described equipment under test insulation resistance is the insulation resistance of motor, speed regulating device or Transformer Winding.
9. electricity leakage locking protection circuit according to claim 8; it is characterized in that; described equipment under test insulation resistance is the insulation resistance of switched reluctance machines; the switched reluctance machines shell is connected with ground; detecting comparison module is connected with negative busbar in switched reluctance machines by serial connection relay normally-closed contact, diode; relay normally open contact is connected in the contactor coil that powers on, and switched reluctance machines is carried out latch-up protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110417413.6A CN103166177B (en) | 2011-12-14 | 2011-12-14 | A kind of electricity leakage locking protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110417413.6A CN103166177B (en) | 2011-12-14 | 2011-12-14 | A kind of electricity leakage locking protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103166177A true CN103166177A (en) | 2013-06-19 |
| CN103166177B CN103166177B (en) | 2016-01-20 |
Family
ID=48589026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110417413.6A Expired - Fee Related CN103166177B (en) | 2011-12-14 | 2011-12-14 | A kind of electricity leakage locking protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103166177B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300240A (en) * | 2016-09-28 | 2017-01-04 | 杭州先途电子有限公司 | Delay protection circuit |
| CN110441603A (en) * | 2019-08-13 | 2019-11-12 | 西安西驰电气股份有限公司 | A kind of earth leakage search/lockout sample circuit and detection method |
| CN112072629A (en) * | 2020-09-10 | 2020-12-11 | 新风光电子科技股份有限公司 | 3300V and following voltage class electric leakage blocking circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2258095A (en) * | 1991-07-26 | 1993-01-27 | Paul Victor Brennan | Residual current device |
| CN2582243Y (en) * | 2002-11-08 | 2003-10-22 | 杨运富 | Comprehensive protective device for coal mine motor |
| EP1914557A2 (en) * | 2006-10-20 | 2008-04-23 | Fanuc Ltd | Insulation-resistance degradation detecting device for motors |
| US20090195205A1 (en) * | 2008-02-01 | 2009-08-06 | Sanyo Denki Co., Ltd. | Motor control system including electrical insulation deterioration detecting system |
| CN101593961A (en) * | 2009-07-07 | 2009-12-02 | 中国科学技术大学 | DC power supply short-circuit protection circuit based on contactless current sample |
| CN202424119U (en) * | 2011-12-14 | 2012-09-05 | 山西潞安环保能源开发股份有限公司 | Leakage lockout protecting circuit |
-
2011
- 2011-12-14 CN CN201110417413.6A patent/CN103166177B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2258095A (en) * | 1991-07-26 | 1993-01-27 | Paul Victor Brennan | Residual current device |
| CN2582243Y (en) * | 2002-11-08 | 2003-10-22 | 杨运富 | Comprehensive protective device for coal mine motor |
| EP1914557A2 (en) * | 2006-10-20 | 2008-04-23 | Fanuc Ltd | Insulation-resistance degradation detecting device for motors |
| US20090195205A1 (en) * | 2008-02-01 | 2009-08-06 | Sanyo Denki Co., Ltd. | Motor control system including electrical insulation deterioration detecting system |
| CN101593961A (en) * | 2009-07-07 | 2009-12-02 | 中国科学技术大学 | DC power supply short-circuit protection circuit based on contactless current sample |
| CN202424119U (en) * | 2011-12-14 | 2012-09-05 | 山西潞安环保能源开发股份有限公司 | Leakage lockout protecting circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300240A (en) * | 2016-09-28 | 2017-01-04 | 杭州先途电子有限公司 | Delay protection circuit |
| CN110441603A (en) * | 2019-08-13 | 2019-11-12 | 西安西驰电气股份有限公司 | A kind of earth leakage search/lockout sample circuit and detection method |
| CN110441603B (en) * | 2019-08-13 | 2021-07-20 | 西安西驰电气股份有限公司 | Electric leakage blocking sampling circuit and detection method |
| CN112072629A (en) * | 2020-09-10 | 2020-12-11 | 新风光电子科技股份有限公司 | 3300V and following voltage class electric leakage blocking circuit |
| CN112072629B (en) * | 2020-09-10 | 2022-10-25 | 新风光电子科技股份有限公司 | 3300V and following voltage class electric leakage blocking circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103166177B (en) | 2016-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102810893A (en) | Power generator module connectivity control | |
| CN105449633A (en) | Over/under voltage protection system of electrical equipment | |
| CN202794900U (en) | Wireless on-site device provided with independent input/output | |
| CN105896622A (en) | High-reliability inductive energy taking power supply for power transmission line | |
| CN205051931U (en) | LED driving power supply | |
| CN103166177B (en) | A kind of electricity leakage locking protection circuit | |
| CN105762883A (en) | Method for charging electronic equipment, and electronic equipment | |
| CN204243728U (en) | Transformer overload protection warning device | |
| CN105514944A (en) | Power protection circuit and method | |
| CN204167961U (en) | USB automobile charger automatic shutdown circuitry | |
| CN203339658U (en) | Electric leakage protection device | |
| CN104037846A (en) | Wireless charging remote control and charger | |
| CN205051933U (en) | LED driving power supply | |
| CN205622245U (en) | High reliability transmission line responds to draw -out power supply | |
| CN202524069U (en) | Reverse-polarity protection circuit | |
| CN202424119U (en) | Leakage lockout protecting circuit | |
| CN114094934A (en) | Photovoltaic module turn-off module and turn-off method | |
| CN204559141U (en) | Charge power supply of battery system | |
| CN202268715U (en) | Charging device possessing overcharge detection protection function | |
| CN104578339A (en) | Inductive power-obtaining device of high-voltage line robot and working method of inductive power-obtaining device | |
| US20160315550A1 (en) | Power conversion device and control method thereof | |
| CN209250219U (en) | A kind of under-voltage delay protection device of power supply | |
| CN203259837U (en) | Loop state signal acquisition apparatus of motor control center | |
| CN105743180A (en) | Method for charging electronic equipment, and electronic equipment | |
| CN204440088U (en) | Output switch parameter self-protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: NIDEC (BEIJING) DRIVE SYSTEM TECHNIQUE CO., LTD. Free format text: FORMER OWNER: BEIJING CHINA TEX MECHANICAL + ELECTRICAL ENGINEERING LTD. Effective date: 20150731 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150731 Address after: 046204 Hou Town, Xiangyuan County, Changzhi, Shanxi Applicant after: SHANXI LU'AN ENVIRONMENTAL ENERGY DEVELOPMENT Co.,Ltd. Applicant after: Nidec (Beijing) Transmission Technology Co.,Ltd. Address before: 046204 Hou Town, Xiangyuan County, Changzhi, Shanxi Applicant before: SHANXI LU'AN ENVIRONMENTAL ENERGY DEVELOPMENT Co.,Ltd. Applicant before: Beijing China Tex Mechanical & Electrical Engineering Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20211214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |