CN101789705B - Small positive output high voltage module power with function of self-recovery protection - Google Patents
Small positive output high voltage module power with function of self-recovery protection Download PDFInfo
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- CN101789705B CN101789705B CN2010101250519A CN201010125051A CN101789705B CN 101789705 B CN101789705 B CN 101789705B CN 2010101250519 A CN2010101250519 A CN 2010101250519A CN 201010125051 A CN201010125051 A CN 201010125051A CN 101789705 B CN101789705 B CN 101789705B
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Abstract
The invention relates to a small positive output high voltage module power with function of self-recovery protection, comprising a power circuit packaged in a shell. A plurality of withdrawing needles are welded on the power circuit. The power circuit comprises a control circuit, an assist and drive circuit, a self-recovery protection circuit, a high voltage feedback circuit and a voltage-doubler rectifying and filtering circuit. The control circuit is connected with the self-recovery protection circuit and the high voltage feedback circuit respectively by the assist and drive circuit and the voltage-doubler rectifying and filtering circuit. The self-recovery protection circuit and the high voltage feedback circuit are respectively connected with the control circuit. The power has the following benefits: the output adjustment range is wide and adjustment can be carried out from zero; high voltage output can be adjusted by external control voltage or a potentiometer; the output conversion efficiency is high; the power has the function of external start/stop control; the power has the function of self-recovery protection during output overload or short circuit; the power has low temperature drift, high stability, low output ripple and good long-time stability; and the power has small overall dimension and light weight and is easy in PCB installation.
Description
Technical field
The present invention relates to a kind of small positive output high voltage module power with function of self-recovery protection that is widely used in the aspect instrument and equipments such as mass spectrum and solid surface analysis, high-energy physics detection, semiconductor element detection system, environmental monitoring and airborne particle counter, medical use.
Background technology
Existing low-power high-voltage modular power source product on the market, though kind and purposes are a lot, ubiquity the defective of the multiple functional parameter requirement that can not get both, if any volume bigger, be difficult for PCB and install; The delivery efficiency that has is low, makes from loss to increase; The output protecting function that has is poor, is prone to cause damage; The output adjustable range that has is narrow, and it is restricted at work; What have can only regulate output with variable resistor, regulates dumb etc.
Summary of the invention
In view of the deficiency that prior art exists, the invention provides high, the more comprehensive small positive output high voltage module power with function of self-recovery protection of function of a kind of reliability and stability.
The present invention is for realizing above-mentioned purpose; The technical scheme of being taked is: small positive output high voltage module power with function of self-recovery protection; Comprise the power circuit that is encapsulated in the housing; Be welded with several pins that draw on the power circuit; It is characterized in that: said power circuit comprises control circuit, auxiliary and drive circuit, self-recovery protection circuit, high pressure feedback circuit, voltage multiplying rectifier and filter circuit, and said control circuit is connected with self-recovery protection circuit, high pressure feedback circuit respectively through auxiliary and drive circuit, voltage multiplying rectifier and filter circuit, and said self-recovery protection circuit is connected with control circuit respectively with the high pressure feedback circuit;
2 pin of control chip U1 link to each other with 6 pin and an end of connecting resistance R4 and capacitor C 1 respectively in the said control circuit; The other end of capacitor C 1 links to each other with 1 pin of control chip U1 and meets input ground GND; The end of the 7 pin difference connecting resistance R3 of control chip U1 and the other end of resistance R 4; The end of the 8 pin difference connecting resistance R5 of control chip U1 and the other end of resistance R 3, the other end of resistance R 5 connects 4 pin of control chip U1 and the collector electrode of triode T4 respectively, and an end of resistance R 6 connects an end of base stage and the capacitor C 2 of triode T4 respectively; Another termination start and stop control end R/S of resistance R 6, the other end of capacitor C 2 link to each other with triode T4 emitter and meet input ground GND;
Said auxiliary 1 pin that reaches voltage stabilizing a reference source U3 in the drive circuit links to each other with 3 pin and the end of difference connecting resistance R2 and the positive pole of capacitor C 4; Simultaneously again as reference voltage output end Vref; The negative pole of capacitor C 4 links to each other with 2 pin of voltage stabilizing a reference source U3 and meets input ground GND; One end of resistance R 1 connects 8 pin of control chip U1 in the positive pole, control circuit of negative pole, the capacitor C 5 of diode D1 respectively and as in-line power end Vcc, and resistance R 1 links to each other with the other end of resistance R 2 and meets an end, the power input+Vin of inductance L respectively, and the other end of inductance L connects the positive pole of capacitor C 3 and 1 end of transformer TRF primary coil Lp respectively; The negative pole of capacitor C 1 meets input ground GND; The drain electrode of the 2 termination triode T1 of transformer TRF primary coil Lp, resistance R 7 is parallelly connected with diode D4, and the grid of triode T1 connects the positive pole of diode D4 and an end of capacitor C 6 respectively; 3 pin of control chip U1 in the negative pole connection control circuit of diode D4, the other end of capacitor C 6 link to each other with the source electrode of triode T1 and meet input ground GND;
An end of 5 pin of amplifier U2B difference connecting resistance R16, resistance R 17, capacitor C 12 in the said self-recovery protection circuit; Another termination input ground GND of resistance R 16; 6 pin of amplifier U2B respectively connecting resistance R15 and resistance R 18 an end and meet input ground GND through capacitor C 13; The other end of resistance R 17 and resistance R 18 links to each other and meets reference voltage output end Vref, and resistance R 21 is parallelly connected with capacitor C 14 and diode D7 respectively, the end of the other end connecting resistance R21 of resistance R 15; Another termination output ground HGND of resistance R 21; 7 pin of amplifier U2B connect the other end of capacitor C 12 and the positive pole of diode D3 respectively, the end of the negative pole difference connecting resistance R13 of diode D3 and the positive pole of capacitor C 11, and the negative pole of capacitor C 11 meets input ground GND; The end of the other end difference connecting resistance R12 of resistance R 13 and the base stage of triode T2; Triode T2 emitter links to each other with the base stage of triode T3, the collector electrode of triode T2 link to each other with the collector electrode of triode T3 and connection control circuit in 5 pin of control chip U1, triode T3 emitter links to each other with the other end of resistance R 12 and GND with connecing input;
An end of 2 pin of amplifier U2A difference connecting resistance R11, resistance R 19, capacitor C 8 in the said high pressure feedback circuit; Another termination input ground GND of resistance R 11, resistance R 20 is parallelly connected with capacitor C 10, the end of the other end connecting resistance R20 of resistance R 19; Resistance R 8 is parallelly connected with capacitor C 9; 3 pin of amplifier U2A are an end and the voltage-regulation input Vadj of connecting resistance R8 respectively, and resistance R 10 is parallelly connected with diode D2, and 1 pin of amplifier U2A is an end, the other end of capacitor C 8 and the negative pole of diode D2 of connecting resistance R9 respectively; The positive pole of diode D2 connects 5 pin of control chip U1 in an end and the control circuit of capacitor C 7 respectively; Capacitor C 7 links to each other with the other end of resistance R 9 and meets input ground GND, and 8 pin of amplifier U2A meet in-line power end Vcc, and 4 pin of amplifier U2A meet input ground GND;
3 ends of transformer TRF secondary high coil Ls connect the positive pole of diode D6 and the negative pole of diode D5 respectively through capacitor C 15 in said voltage multiplying rectifier and the filter circuit; 4 ends of transformer TRF secondary high coil Ls connect the negative pole of diode D7 in an end and the self-recovery protection circuit of positive pole, capacitor C 16 of diode D5 respectively; The other end of capacitor C 16 connects the negative pole of diode D6 and an end of resistance R 14 respectively; The other end of resistance R 14 meets the other end, the high-voltage output end+HV of resistance R 20 in the end, high pressure feedback circuit of capacitor C 17, another termination output ground HGND of capacitor C 17 respectively.
The invention has the beneficial effects as follows: the output adjustable range is wide, can transfer from zero; High pressure output can be regulated through external control voltage or potentiometer; The output conversion efficiency is high; Outside start and stop controlled function is arranged; Self-recovery protection function when having to output overloading or short circuit; Temperature is floated little, and stability is high, and output ripple is low, and long-time stability are good; Overall dimension is little, and is in light weight, is easy to PCB and installs.
Description of drawings
Fig. 1 is a profile sketch map of the present invention.
Fig. 2 is the upward view of Fig. 1.
Fig. 3 is that circuit of the present invention connects block diagram.
Fig. 4 is circuit theory diagrams of the present invention.
Embodiment
Like Fig. 1,2,3, shown in 4; Small positive output high voltage module power with function of self-recovery protection; Comprise the power circuit that is encapsulated in the housing 1; Be welded with several pins 2 that draw on the power circuit; Power circuit comprises control circuit, auxiliary and drive circuit, self-recovery protection circuit, high pressure feedback circuit, voltage multiplying rectifier and filter circuit, and said control circuit is connected with self-recovery protection circuit, high pressure feedback circuit respectively through auxiliary and drive circuit, voltage multiplying rectifier and filter circuit, and said self-recovery protection circuit is connected with control circuit respectively with the high pressure feedback circuit;
2 pin of control chip U1 link to each other with 6 pin and an end of connecting resistance R4 and capacitor C 1 respectively in the control circuit; The other end of capacitor C 1 links to each other with 1 pin of control chip U1 and meets input ground GND; The end of the 7 pin difference connecting resistance R3 of control chip U1 and the other end of resistance R 4; The end of the 8 pin difference connecting resistance R5 of control chip U1 and the other end of resistance R 3, the other end of resistance R 5 connects 4 pin of control chip U1 and the collector electrode of triode T4 respectively, and an end of resistance R 6 connects an end of base stage and the capacitor C 2 of triode T4 respectively; Another termination start and stop control end R/S of resistance R 6, the other end of capacitor C 2 link to each other with triode T4 emitter and meet input ground GND;
Auxiliary 1 pin that reaches voltage stabilizing a reference source U3 in the drive circuit links to each other with 3 pin and the end of difference connecting resistance R2 and the positive pole of capacitor C 4; Simultaneously again as reference voltage output end Vref; The negative pole of capacitor C 4 links to each other with 2 pin of voltage stabilizing a reference source U3 and meets input ground GND; One end of resistance R 1 connects 8 pin of control chip U1 in the positive pole, control circuit of negative pole, the capacitor C 5 of diode D1 respectively and as in-line power end Vcc, and resistance R 1 links to each other with the other end of resistance R 2 and meets an end, the power input+Vin of inductance L respectively, and the other end of inductance L connects the positive pole of capacitor C 3 and 1 end of transformer TRF primary coil Lp respectively; The negative pole of capacitor C 1 meets input ground GND; The drain electrode of the 2 termination triode T1 of transformer TRF primary coil Lp, resistance R 7 is parallelly connected with diode D4, and the grid of triode T1 connects the positive pole of diode D4 and an end of capacitor C 6 respectively; 3 pin of control chip U1 in the negative pole connection control circuit of diode D4, the other end of capacitor C 6 link to each other with the source electrode of triode T1 and meet input ground GND;
An end of 5 pin of amplifier U2B difference connecting resistance R16, resistance R 17, capacitor C 12 in the self-recovery protection circuit; Another termination input ground GND of resistance R 16; 6 pin of amplifier U2B respectively connecting resistance R15 and resistance R 18 an end and meet input ground GND through capacitor C 13; The other end of resistance R 17 and resistance R 18 links to each other and meets reference voltage output end Vref, and resistance R 21 is parallelly connected with capacitor C 14 and diode D7 respectively, the end of the other end connecting resistance R21 of resistance R 15; Another termination output ground HGND of resistance R 21; 7 pin of amplifier U2B connect the other end of capacitor C 12 and the positive pole of diode D3 respectively, the end of the negative pole difference connecting resistance R13 of diode D3 and the positive pole of capacitor C 11, and the negative pole of capacitor C 11 meets input ground GND; The end of the other end difference connecting resistance R12 of resistance R 13 and the base stage of triode T2; Triode T2 emitter links to each other with the base stage of triode T3, the collector electrode of triode T2 link to each other with the collector electrode of triode T3 and connection control circuit in 5 pin of control chip U1, triode T3 emitter links to each other with the other end of resistance R 12 and GND with connecing input;
An end of 2 pin of amplifier U2A difference connecting resistance R11, resistance R 19, capacitor C 8 in the high pressure feedback circuit; Another termination input ground GND of resistance R 11, resistance R 20 is parallelly connected with capacitor C 10, the end of the other end connecting resistance R20 of resistance R 19; Resistance R 8 is parallelly connected with capacitor C 9; 3 pin of amplifier U2A are an end and the voltage-regulation input Vadj of connecting resistance R8 respectively, and resistance R 10 is parallelly connected with diode D2, and 1 pin of amplifier U2A is an end, the other end of capacitor C 8 and the negative pole of diode D2 of connecting resistance R9 respectively; The positive pole of diode D2 connects 5 pin of control chip U1 in an end and the control circuit of capacitor C 7 respectively; Capacitor C 7 links to each other with the other end of resistance R 9 and meets input ground GND, and 8 pin of amplifier U2A meet in-line power end Vcc, and 4 pin of amplifier U2A meet input ground GND;
3 ends of transformer TRF secondary high coil Ls connect the positive pole of diode D6 and the negative pole of diode D5 respectively through capacitor C 15 in voltage multiplying rectifier and the filter circuit; 4 ends of transformer TRF secondary high coil Ls connect the negative pole of diode D7 in an end and the self-recovery protection circuit of positive pole, capacitor C 16 of diode D5 respectively; The other end of capacitor C 16 connects the negative pole of diode D6 and an end of resistance R 14 respectively; The other end of resistance R 14 meets the other end, the high-voltage output end+HV of resistance R 20 in the end, high pressure feedback circuit of capacitor C 17, another termination output ground HGND of capacitor C 17 respectively.
Main control circuit adopts the separated exciting oscillating circuit, and has the start and stop control end, and circuit structure is simple, and control is convenient; Novel self-recovery protection circuit when high pressure output overloading or short circuit, is protected high voltage source well.
Select control chip and other components and parts of low noise, low temperature drift, good stability for use; Rational PCB layout is guaranteed the independent pathway between each ' ', avoids crosstalking each other between each signal; Reliability and stability that high-voltage module power supply is long-term are guaranteed in good transformer line pack arrangement technology, technique for coiling and High-Voltage Insulation processing etc.
Modular power source adopts metal shell, and with its frame ground, externally has good electromagnetic shielding action, has improved the antijamming capability of power supply.
Operation principle: form oscillating circuit by control chip U1, capacitor C 1, resistance R 3 and resistance R 4 etc.; 3 pin output oscillation pulse signal from control chip U1 through triode T1 driving transformer TRF primary coil Lp, produces the high frequency of oscillation alternating voltage; And at its two ends generation induced potential; Be coupled to its secondary high-tension coil Ls through transformer TRF, and behind the voltage multiplying rectifier and filter circuit via compositions such as diode D5, D6 and capacitor C 15, C16, C17, the high direct voltage of output smoothing.
High pressure sampled signal from feedback resistance R11, resistance R 19, resistance R 20 and capacitor C 10 acquisitions; Current potential with voltage-regulation input Vadj; Through the high pressure feedback circuit of forming by amplifier U2A etc.; Remove to control the current potential of control chip U15 pin, change the frequency and the duty ratio of the 3 pin output pulse of control chip U1, the output high pressure is stablized.
Output current sampled signal from resistance R 21 obtains moves 6 pin that are added to amplifier U2B through resistance R 15 and through level, with the benchmark partial pressure potential of resistance R that is added to amplifier U2B 5 pin 16 and resistance R 17, and control amplifier U2B output.When the mean value of output current during greater than set point, 7 pin of amplifier U2B are high potential, and give capacitor C 11 chargings and be full of through diode D3 moment; Make triode T2 and triode T3 conducting through resistance R 13 simultaneously, the 5 pin current potentials of control chip U1 are pulled near zero potential, and then closing control output pulse; High pressure output is descended rapidly, and the mean value of output current is less than set point at this moment, and 7 pin of amplifier U2B become electronegative potential; Capacitor C 11 is slowly discharged through resistance R 13, triode T2 and triode T3; T3 ends until triode, and the 5 pin current potentials of control chip U1 also slowly rise, and high pressure output is risen gradually.
In addition, when when start and stop control end R/S adds a high level, but the output of positive closing high pressure; Inductance L plays the isolation barrier effect to the high frequency of oscillation alternating voltage, reduces the interference of high-frequency ac working pulse to control circuit and supply power voltage.
Claims (2)
1. small positive output high voltage module power with function of self-recovery protection; Comprise the power circuit that is encapsulated in the housing (1); Be welded with several pins (2) that draw on the power circuit; It is characterized in that: said power circuit comprises control circuit, auxiliary and drive circuit, self-recovery protection circuit, high pressure feedback circuit, voltage multiplying rectifier and filter circuit; Said control circuit is connected with self-recovery protection circuit input end, high pressure feedback circuit input respectively through auxiliary and drive circuit, voltage multiplying rectifier and filter circuit, and said self-recovery protection circuit output end is connected with control circuit respectively with high pressure feedback circuit output;
The trigger end TRIG of control chip U1 links to each other with threshold value end THR and an end of connecting resistance R4 and capacitor C 1 respectively in the said control circuit; The other end of capacitor C 1 links to each other with control chip U1 earth terminal and meets input ground GND; The end of the discharge end DIS difference connecting resistance R3 of control chip U1 and the other end of resistance R 4; The end of the power end VCC difference connecting resistance R5 of control chip U1 and the other end of resistance R 3; The other end of resistance R 5 connects the collector electrode of reset terminal R and the triode T4 of control chip U1 respectively; One end of resistance R 6 connects an end of base stage and the capacitor C 2 of triode T4 respectively, and another termination start and stop control end R/S of resistance R 6, the other end of capacitor C 2 link to each other with triode T4 emitter and meet input ground GND;
The said auxiliary reference utmost point that reaches voltage stabilizing a reference source U3 in the drive circuit links to each other with negative electrode and the end of difference connecting resistance R2 and the positive pole of capacitor C 4; Simultaneously again as reference voltage output end Vref; The negative pole of capacitor C 4 links to each other with the anode of voltage stabilizing a reference source U3 and meets input ground GND; One end of resistance R 1 meets the power end VCC of control chip U1 in the positive pole, control circuit of negative pole, the capacitor C 5 of diode D1 respectively and as in-line power end Vcc; Resistance R 1 links to each other with the other end of resistance R 2 and meets an end, the power input+Vin of inductance L respectively; The other end of inductance L connects the positive pole of capacitor C 3 and 1 end of transformer TRF primary coil Lp respectively, and the negative pole of capacitor C 1 connects input ground GND, the drain electrode of the 2 termination triode T1 of transformer TRF primary coil Lp; Resistance R 7 is parallelly connected with diode D4; The grid of triode T1 connects the positive pole of diode D4 and an end of capacitor C 6 respectively, and the output Q of control chip U1 in the negative pole connection control circuit of diode D4, the other end of capacitor C 6 link to each other with the source electrode of triode T1 and meet input ground GND;
An end of the in-phase input end of amplifier U2B difference connecting resistance R16, resistance R 17, capacitor C 12 in the said self-recovery protection circuit; Another termination input ground GND of resistance R 16; The inverting input of amplifier U2B respectively connecting resistance R15 and resistance R 18 an end and meet input ground GND through capacitor C 13; The other end of resistance R 17 and resistance R 18 links to each other and meets reference voltage output end Vref, and resistance R 21 is parallelly connected with capacitor C 14 and diode D7 respectively, the end of the other end connecting resistance R21 of resistance R 15; Another termination output ground HGND of resistance R 21; The output of amplifier U2B connects the other end of capacitor C 12 and the positive pole of diode D3 respectively, the end of the negative pole difference connecting resistance R13 of diode D3 and the positive pole of capacitor C 11, and the negative pole of capacitor C 11 meets input ground GND; The end of the other end difference connecting resistance R12 of resistance R 13 and the base stage of triode T2; Triode T2 emitter links to each other with the base stage of triode T3, the collector electrode of triode T2 link to each other with the collector electrode of triode T3 and connection control circuit in the control end CVOlt of control chip U1, triode T3 emitter links to each other with the other end of resistance R 12 and GND with connecing input;
An end of the inverting input of amplifier U2A difference connecting resistance R11, resistance R 19, capacitor C 8 in the said high pressure feedback circuit; Another termination input ground GND of resistance R 11, resistance R 20 is parallelly connected with capacitor C 10, the end of the other end connecting resistance R20 of resistance R 19; Resistance R 8 is parallelly connected with capacitor C 9; The in-phase input end of amplifier U2A is an end and the voltage-regulation input Vadj of connecting resistance R8 respectively, and resistance R 10 is parallelly connected with diode D2, and the output of amplifier U2A is an end, the other end of capacitor C 8 and the negative pole of diode D2 of connecting resistance R9 respectively; The positive pole of diode D2 meets the control end CVOlt of control chip U1 in an end and the control circuit of capacitor C 7 respectively; Capacitor C 7 links to each other with the other end of resistance R 9 and meets input ground GND, the power supply termination in-line power end Vcc of amplifier U2A, termination input ground, the ground GND of amplifier U2A; 3 ends of transformer TRF secondary high coil Ls connect the positive pole of diode D6 and the negative pole of diode D5 respectively through capacitor C 15 in said voltage multiplying rectifier and the filter circuit; 4 ends of transformer TRF secondary high coil Ls connect the negative pole of diode D7 in an end and the self-recovery protection circuit of positive pole, capacitor C 16 of diode D5 respectively; The other end of capacitor C 16 connects the negative pole of diode D6 and an end of resistance R 14 respectively; The other end of resistance R 14 meets the other end, the high-voltage output end+HV of resistance R 20 in the end, high pressure feedback circuit of capacitor C 17, another termination output ground HGND of capacitor C 17 respectively.
2. a kind of small positive output high voltage module power with function of self-recovery protection according to claim 1; It is characterized in that: said several pins (2) that draw are exposed to outside the housing (1); One side is five and draws pin (2) GND, start and stop control end R/S, voltage-regulation input Vadj, reference voltage output end Vref sequence arrangement with pressing power input+Vin, input; Opposite side is two and draws pin (2), presses high-voltage output end+HV, output ground HGND sequence arrangement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101250519A CN101789705B (en) | 2010-03-16 | 2010-03-16 | Small positive output high voltage module power with function of self-recovery protection |
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| CN2010101250519A CN101789705B (en) | 2010-03-16 | 2010-03-16 | Small positive output high voltage module power with function of self-recovery protection |
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| CN101789705A CN101789705A (en) | 2010-07-28 |
| CN101789705B true CN101789705B (en) | 2012-04-18 |
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Families Citing this family (2)
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| CN103633851A (en) * | 2013-12-19 | 2014-03-12 | 东文高压电源（天津）有限公司 | Voltage-adjustable current-adjustable high-performance positive laser power supply circuit composed of 555 |
| CN106028609B (en) * | 2016-07-13 | 2018-03-16 | 东文高压电源（天津）股份有限公司 | A kind of xenon flashing light high-voltage module power supply of wide scope triggering frequency |
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| CN2167784Y (en) * | 1993-03-11 | 1994-06-08 | 刘坤明 | High-frequency conversion electrostatic power source arrangement |
| CN101127484A (en) * | 2007-05-23 | 2008-02-20 | 中国科学院电工研究所 | A digital high voltage DC power |
| CN101188900A (en) * | 2007-10-17 | 2008-05-28 | 廖云峰 | Medical diagnosis X radial high-frequency and high-voltage generator based on dual-bed and dual-tube |
| CN201623648U (en) * | 2010-03-16 | 2010-11-03 | 天津市东文高压电源厂 | Small-volume self-recovery protection positive-output high-voltage module power source |
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2010
- 2010-03-16 CN CN2010101250519A patent/CN101789705B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2167784Y (en) * | 1993-03-11 | 1994-06-08 | 刘坤明 | High-frequency conversion electrostatic power source arrangement |
| CN101127484A (en) * | 2007-05-23 | 2008-02-20 | 中国科学院电工研究所 | A digital high voltage DC power |
| CN101188900A (en) * | 2007-10-17 | 2008-05-28 | 廖云峰 | Medical diagnosis X radial high-frequency and high-voltage generator based on dual-bed and dual-tube |
| CN201623648U (en) * | 2010-03-16 | 2010-11-03 | 天津市东文高压电源厂 | Small-volume self-recovery protection positive-output high-voltage module power source |
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Owner name: TIANJIN DONGWEN HIGH VOLTAGE POWER SUPPLY CO., LTD Free format text: FORMER OWNER: TIANJIN DONGWEN HIGH VOLTAGE POWER SUPPLY FACTORY Effective date: 20120625 |
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Effective date of registration: 20120625 Address after: 300171, blue mansion, No. eleven, No. 47, Hedong Road, Hedong District, Tianjin, 8F Patentee after: Tianjin Dongwen High Voltage Power Supply Plant Address before: 300171, blue mansion, No. eleven, No. 47, Hedong Road, Hedong District, Tianjin, 8F Patentee before: Tianjin Dongwen High Voltage Power Supply Factory |
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Owner name: DONGWEN HIGH VOLTAGE POWER SUPPLY (TIANJIN) CO., L Free format text: FORMER NAME: TIANJIN DONGWEN HIGH-VOLTAGE POWER SUPPLY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 300220, Tianjin, Hexi District, 20 Dongting Road, Chen Tong Technology Business District Service Center 415-3 Patentee after: Wen Dong high voltage power supply (Tianjin) Limited by Share Ltd Address before: 300171, blue mansion, No. eleven, No. 47, Hedong Road, Hedong District, Tianjin, 8F Patentee before: Tianjin Dongwen High Voltage Power Supply Plant |