CN114726242A - Radiation-resistant three-phase multiple protection rectifying circuit - Google Patents

Radiation-resistant three-phase multiple protection rectifying circuit Download PDF

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Publication number
CN114726242A
CN114726242A CN202210452734.8A CN202210452734A CN114726242A CN 114726242 A CN114726242 A CN 114726242A CN 202210452734 A CN202210452734 A CN 202210452734A CN 114726242 A CN114726242 A CN 114726242A
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CN
China
Prior art keywords
live wire
diode
series
output end
anode
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Pending
Application number
CN202210452734.8A
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Chinese (zh)
Inventor
王亚德
周青
唐树华
刘保华
冯晓花
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China Nuclear Power Technology Research Institute Co Ltd
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Huarong Technology Co Ltd
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Publication date
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Priority to CN202210452734.8A priority Critical patent/CN114726242A/en
Publication of CN114726242A publication Critical patent/CN114726242A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The invention provides an irradiation-resistant three-phase multiple protection rectifying circuit, which comprises a first live wire, a second live wire and a third live wire, wherein the first live wire, the second live wire and the third live wire are respectively input with alternating-current phase voltages; the first live wire, the second live wire and the third live wire are connected with a rectifier bridge unit; a rectifier bridge unit connected to the first live wire, the second live wire and the third live wire, respectively, for converting an ac voltage into a dc voltage; the voltage output end is connected with the rectifier bridge unit and used for outputting the direct-current voltage; a first fuse is connected in series with the first live wire; a second fuse is connected in series with the second live wire; and a third fuse is connected in series with the third live wire. Each live wire is respectively connected with a fuse in series, so that overcurrent or short-circuit protection is realized on the rectifier circuit, and a stable, safe and reliable constant-current power supply is provided for a load.

Description

Radiation-resistant three-phase multiple protection rectifying circuit
Technical Field
The invention relates to the technical field of power electronics, in particular to an irradiation-resistant three-phase multiple protection rectifying circuit.
Background
At present, a temperature switch is mostly adopted in a conventional circuit to protect a power element in the circuit, but the protection only relates to temperature, the protection range is limited, how to improve the stability, reliability and radiation-resistant element of the circuit performance is to provide a reliable and stable constant current power supply for an LED light source, so that the whole lamp is safer and more reliable, and the problem to be solved is solved.
Disclosure of Invention
Based on the existing problems, the invention provides an irradiation-resistant three-phase multiple protection rectifying circuit, and aims to solve the technical problems that a constant current power supply circuit in the prior art is unstable in performance and the like.
An irradiation-resistant three-phase multiple protection rectifying circuit comprises:
the device comprises a first live wire, a second live wire and a third live wire which are respectively input with alternating-current phase voltages;
the first live wire, the second live wire and the third live wire are connected with a rectifier bridge unit;
a rectifier bridge unit connected to the first live wire, the second live wire and the third live wire, respectively, for converting an ac voltage into a dc voltage;
the voltage output end is connected with the rectifier bridge unit and used for outputting the direct-current voltage;
a first fuse is connected in series with the first live wire;
a second fuse is connected in series with the second live wire;
and a third fuse is connected in series with the third live wire.
Further, a first thermistor is connected in series with the first live wire;
the second fire wire is also connected with a second thermistor in series;
and a third thermistor is also connected in series with the third live wire.
Further, a first voltage dependent resistor is connected between the first live wire and the second live wire;
a second piezoresistor and a second gas discharge tube are connected between the first live wire and the third live wire;
and a third piezoresistor is connected between the second live wire and the third live wire.
Further, a first gas discharge tube connected with a first voltage dependent resistor in series is further arranged between the first live wire and the second live wire;
a second gas discharge tube connected in series with a second piezoresistor is further arranged between the first live wire and the third live wire;
and a third gas discharge tube connected with a third voltage dependent resistor in series is further arranged between the second live wire and the third live wire.
Further, the rectifier bridge unit includes a diode rectifier bridge, the diode rectifier bridge includes a first bridge arm, a second bridge arm and a third bridge arm, and the voltage output end includes a positive output end and a negative output end;
the first bridge arm comprises a first diode and a second diode, the anode of the first diode is connected with the cathode of the second diode, the cathode of the first diode is connected with the anode output end, the anode of the second diode is connected with the cathode output end, and the output end of the first live wire is connected between the anode of the first diode and the cathode of the second diode;
the second bridge arm comprises a third diode and a fourth diode, the anode of the third diode is connected with the cathode of the fourth diode, the cathode of the third diode is connected with the anode output end, the anode of the fourth diode is connected with the cathode output end, and the output end of the second live wire is connected between the anode of the third diode and the cathode of the fourth diode;
the third bridge arm comprises a fifth diode and a sixth diode, the anode of the fifth diode is connected with the cathode of the sixth diode, the cathode of the fifth diode is connected with the anode output end, the anode of the sixth diode is connected with the cathode output end, and the output end of the third live wire is connected between the anode of the fifth diode and the cathode of the sixth diode.
Furthermore, the rectifier bridge unit further comprises a capacitor unit, one end of the capacitor unit is connected with the positive electrode output end, and the other end of the capacitor unit is connected with the negative electrode output end.
Wherein the capacitance unit comprises at least one ceramic chip capacitance.
Further, the capacitor unit comprises at least two ceramic chip capacitors, and the ceramic chip capacitors are connected in parallel.
Further, a fourth voltage dependent resistor, a fifth voltage dependent resistor and a sixth voltage dependent resistor are connected in series between the grounding protection line and the negative output end.
Furthermore, the gas discharge tube also comprises a fourth gas discharge tube which is connected with the fifth piezoresistor and the sixth piezoresistor in parallel and connected with the fourth piezoresistor in series.
Furthermore, a first Y-shaped safety capacitor and a second Y-shaped safety capacitor are connected in series between the grounding protection wire and the negative output end.
The invention has the beneficial technical effects that: each live wire is respectively connected with a fuse in series, so that overcurrent or short-circuit protection is realized on the rectifier circuit, and a stable, safe and reliable constant-current power supply is provided for a load.
Drawings
Fig. 1 is a circuit structure diagram of an embodiment of an irradiation-resistant three-phase multiple protection rectification circuit of the present invention.
Fig. 2 is a circuit structure diagram of another embodiment of the radiation-resistant three-phase multiple protection rectification circuit of the present invention.
Wherein the content of the first and second substances,
f1, F2, F3-fuses;
RV1, RV2, RV4, RV6, RV7 and RV 8-piezoresistors;
GDT1, GDT2, GDT3, GDT 4-gas discharge tubes;
c1, C2, C3, C4-ceramic chip capacitance;
d1, D4, D6, D8, D10, D12-diodes;
CY1, CY2-Y type safety capacitors;
RT1, RT2, RT 3-thermistors.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Referring to fig. 1, the invention provides an irradiation-resistant three-phase multiple protection rectification circuit, comprising:
the system comprises a first live wire, a second live wire and a third live wire which are respectively input with alternating-current phase voltage;
the first live wire, the second live wire and the third live wire are connected with a rectifier bridge unit;
a rectifier bridge unit connected to the first live wire, the second live wire and the third live wire, respectively, for converting an ac voltage into a dc voltage;
the voltage output end is connected with the rectifier bridge unit and used for outputting the direct-current voltage;
a first fuse (F1) is connected in series with the first live wire;
a second fuse (F2) is connected in series with the second live wire;
and a third fuse (F3) is connected in series to the third live wire.
Referring to fig. 2, further, a first thermistor (RT1) is connected in series with the first live wire;
a second thermistor (RT2) is also connected in series with the second live wire;
and a third thermistor (RT3) is also connected in series with the third live wire.
Specifically, a first alternating-current phase voltage is input to an input end (L1) of the first live wire, a second alternating-current phase voltage is input to an input end (L2) of the second live wire, and a third alternating-current phase voltage is input to an input end (L3) of the third live wire.
In the invention, each live wire is connected with a fuse in series in the rectifier circuit, when the input current exceeds a fusing value, the fuse circuit protects the rear end circuit, the rectifier circuit is subjected to overcurrent and short-circuit protection, the voltage output end is connected with the lamp, and a stable and reliable constant current power supply is output to the LED light source, so that the whole lamp is safer and more reliable.
Specifically, the rated voltage of the three-phase alternating-current voltage is 380V AC, and the total power of the rated power is 150W. Specifically, surge protection is achieved by using a piezoresistor.
Specifically, a first end of the first fuse (F1) is connected with an input end (L1) of a first live wire, a second end of the first fuse is connected with a first end of the first thermistor (RT1), and a second end of the first thermistor (RT1) is connected with the rectifier bridge unit.
Specifically, a first end of the second fuse (F2) is connected to the input end (L2) of the second live wire, a second end of the second fuse is connected to a first end of the second thermistor (RT2), and a second end of the second thermistor (RT2) is connected to the rectifier bridge unit.
Specifically, a first end of the third fuse (F3) is connected to the input end (L3) of the third live wire, a second end of the third fuse is connected to a first end of the third thermistor (RT3), and a second end of the third thermistor (RT3) is connected to the rectifier bridge unit.
When the current in the circuit is overlarge, the heating resistance value of the thermistor is increased, and the current is reduced, so that the circuit is protected.
Further, a first piezoresistor (RV1) is connected between the first live wire and the second live wire;
a second piezoresistor (RV2) is connected between the first live wire and the third live wire;
and a third piezoresistor (RV4) is connected between the second live wire and the third live wire.
Further, a first gas discharge tube (GDT1) connected in series with a first voltage dependent resistor (RV1) is included between the first live wire and the second live wire;
a second gas discharge tube (GDT3) connected in series with a second varistor (RV2) is further included between the first firing line and the third firing line;
and a third gas discharge tube (GDT2) connected in series with a third piezoresistor (RV4) is also included between the second firing line and the third firing line.
Specifically, a first end of a first piezoresistor (RV1) is connected to a second end of a first thermistor (RT1), a second end of the first piezoresistor (RV1) is connected with a first end of a first gas discharge tube (GDT1), and a second end of the first gas discharge tube (GDT1) is connected with a second end of a second thermistor (RT 2).
Specifically, a first end of the second piezoresistor (RV2) is connected to a second end of the first thermistor (RT1), a second end of the second piezoresistor (RV2) is connected to a first end of the second gas discharge tube (GDT3), and a second end of the second gas discharge tube (GDT3) is connected to a second end of the third thermistor (RT 3).
Specifically, the first end of the third piezoresistor (RV4) is connected to the second end of the second thermistor (RT2), the second end of the third piezoresistor (RV4) is connected to the first end of the third gas discharge tube (GDT2), and the second end of the third gas discharge tube (GDT2) is connected to the second end of the third thermistor (RT 3).
Specifically, the gas discharge tube is also called as a ceramic gas discharge tube, the piezoresistor sometimes has the defect of unstable leakage current, after the piezoresistor with poor performance is used for a period of time, the piezoresistor can generate heat and explode automatically due to the increase of the leakage current, and the problem can be solved by connecting the piezoresistor and the gas discharge tube in series. The piezoresistor and the gas discharge tube are connected in series, so that the transient overvoltage tolerance level of the circuit can be improved, and the limiting voltage when the piezoresistor is used independently can be reduced.
Further, the rectifier bridge unit includes a diode rectifier bridge, the diode rectifier bridge includes a first bridge arm, a second bridge arm and a third bridge arm, and the voltage output end includes a positive output end and a negative output end;
the first bridge arm comprises a first diode (D1) and a second diode (D8), the anode of the first diode (D1) is connected with the cathode of the second diode (D8), the cathode of the first diode (D1) is connected with the positive output end, the anode of the second diode (D8) is connected with the negative output end, and the output end of the first live wire is connected between the anode of the first diode (D1) and the cathode of the second diode (D8);
the second bridge leg comprises a third diode (D4) and a fourth diode (D10), the anode of the third diode (D4) is connected to the cathode of the fourth diode (D10), the cathode of the third diode (D4) is connected to the positive output terminal, the anode of the fourth diode (D10) is connected to the negative output terminal, and the output of the second live line is connected between the anode of the third diode (D4) and the cathode of the fourth diode (D10);
the third bridge arm comprises a fifth diode (D6) and a sixth diode (D12), the anode of the fifth diode (D6) is connected to the cathode of the sixth diode (D12), the cathode of the fifth diode (D6) is connected to the positive output, the anode of the sixth diode (D12) is connected to the negative output, and the output of the third hot line is connected between the anode of the fifth diode (D6) and the cathode of the sixth diode (D12).
The first diode (D1), the second diode (D8), the third diode (D4), the fourth diode (D10), the fifth diode (D6), and the sixth diode (D12) are fast recovery diodes.
Furthermore, the rectifier bridge unit further comprises a capacitor unit, one end of the capacitor unit is connected with the positive output end, and the other end of the capacitor unit is connected with the negative output end.
Wherein the capacitance unit comprises at least one ceramic chip capacitance.
Further, the capacitance unit comprises at least two ceramic chip capacitances, and the ceramic chip capacitances are connected in parallel.
Specifically, the capacitor unit comprises four ceramic chip capacitors (C1, C2, C3 and C4).
Furthermore, a fourth piezoresistor (RV8), a fifth piezoresistor (RV6) and a sixth piezoresistor (RV7) are sequentially connected in series between the grounding protection line PE line and the negative output end.
Further, the gas discharge tube type power supply further comprises a fourth gas discharge tube (GDT4), the fourth gas discharge tube is connected with the fifth piezoresistor (RV6) and the sixth piezoresistor (RV7) in parallel, and the fourth gas discharge tube is connected with the fourth piezoresistor (RV8) in series.
Furthermore, a first Y-type safety capacitor (CY1) and a second Y-type safety capacitor (CY2) are connected in series between the grounding protection line and the negative output end.
The first Y-type safety capacitor (CY1) and the second Y-type safety capacitor (C2) which are connected in series form a parallel connection relation with the fourth piezoresistor (RV8), the fifth piezoresistor (RV6) and the sixth piezoresistor (RV7) which are connected in series.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims (10)

1. An irradiation-resistant three-phase multiple protection rectifying circuit is characterized by comprising:
the system comprises a first live wire, a second live wire and a third live wire which are respectively input with alternating-current phase voltage;
the first live wire, the second live wire and the third live wire are connected with a rectifier bridge unit;
a rectifier bridge unit connected to the first live wire, the second live wire and the third live wire, respectively, for converting an ac voltage into a dc voltage;
the voltage output end is connected with the rectifier bridge unit and used for outputting the direct-current voltage;
a first fuse is connected in series with the first live wire;
a second fuse is connected in series with the second live wire;
and a third fuse is connected in series with the third live wire.
2. The radiation-resistant three-phase multiple protection rectifying circuit as claimed in claim 1, wherein a first thermistor is further connected in series to the first live wire;
the second fire wire is also connected with a second thermistor in series;
and a third thermistor is also connected in series with the third live wire.
3. The radiation-resistant three-phase multiple protection rectifier circuit according to claim 2, wherein a first voltage dependent resistor is connected between the first live wire and the second live wire;
a second piezoresistor is connected between the first live wire and the third live wire;
and a third piezoresistor is connected between the second live wire and the third live wire.
4. The radiation-resistant three-phase multiple protection rectifier circuit of claim 3 further comprising a first gas discharge tube connected in series with the first varistor between the first live line and the second live line;
a second gas discharge tube connected in series with a second piezoresistor is further arranged between the first live wire and the third live wire;
and a third gas discharge tube connected with a third voltage dependent resistor in series is further arranged between the second live wire and the third live wire.
5. The radiation-resistant three-phase multiple protection rectifier circuit of claim 1, wherein the rectifier bridge unit comprises a diode rectifier bridge, the diode rectifier bridge comprises a first bridge arm, a second bridge arm and a third bridge arm, and the voltage output end comprises a positive output end and a negative output end;
the first bridge arm comprises a first diode and a second diode, the anode of the first diode is connected with the cathode of the second diode, the cathode of the first diode is connected with the anode output end, the anode of the second diode is connected with the cathode output end, and the output end of the first live wire is connected between the anode of the first diode and the cathode of the second diode;
the second bridge arm comprises a third diode and a fourth diode, the anode of the third diode is connected with the cathode of the fourth diode, the cathode of the third diode is connected with the anode output end, the anode of the fourth diode is connected with the cathode output end, and the output end of the second live wire is connected between the anode of the third diode and the cathode of the fourth diode;
the third bridge arm comprises a fifth diode and a sixth diode, the anode of the fifth diode is connected with the cathode of the sixth diode, the cathode of the fifth diode is connected with the anode output end, the anode of the sixth diode is connected with the cathode output end, and the output end of the third live wire is connected between the anode of the fifth diode and the cathode of the sixth diode.
6. The radiation-resistant three-phase multiple protection rectifier circuit of claim 5, wherein the rectifier bridge unit further comprises a capacitor unit, one end of the capacitor unit is connected to the positive output terminal, and the other end of the capacitor unit is connected to the negative output terminal.
Wherein the capacitance unit comprises at least one ceramic chip capacitance.
7. The radiation-resistant three-phase multiple protection rectifier circuit of claim 6 wherein said capacitor unit comprises at least two said ceramic capacitors, said ceramic capacitors being connected in parallel.
8. The radiation-resistant three-phase multiple protection rectifying circuit according to claim 5, wherein a fourth voltage dependent resistor, a fifth voltage dependent resistor and a sixth voltage dependent resistor are connected in series between the grounding protection line and the negative output terminal.
9. The radiation-resistant three-phase multiple protection rectifier circuit of claim 8 further comprising a fourth gas discharge tube connected in parallel with the fifth and sixth piezoresistors and in series with the fourth piezoresistor.
10. The radiation-resistant three-phase multiple protection rectification circuit of claim 9, wherein a first Y-type safety capacitor and a second Y-type safety capacitor are connected in series between the grounding protection line and the negative output end.
CN202210452734.8A 2022-04-27 2022-04-27 Radiation-resistant three-phase multiple protection rectifying circuit Pending CN114726242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210452734.8A CN114726242A (en) 2022-04-27 2022-04-27 Radiation-resistant three-phase multiple protection rectifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210452734.8A CN114726242A (en) 2022-04-27 2022-04-27 Radiation-resistant three-phase multiple protection rectifying circuit

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CN114726242A true CN114726242A (en) 2022-07-08

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887897A (en) * 2016-09-29 2018-04-06 维谛技术有限公司 A kind of three-phase PFC surging protection circuits and power electronic equipment
CN211744341U (en) * 2019-12-31 2020-10-23 宁波三星智能电气有限公司 Power supply circuit with overvoltage protection circuit
CN114400907A (en) * 2021-12-09 2022-04-26 华荣科技股份有限公司 Radiation-resistant three-phase diode series dual-protection rectifying circuit
CN114400906A (en) * 2021-12-09 2022-04-26 华荣科技股份有限公司 Radiation-resistant three-phase capacitor parallel piezoresistor rectifying circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887897A (en) * 2016-09-29 2018-04-06 维谛技术有限公司 A kind of three-phase PFC surging protection circuits and power electronic equipment
CN211744341U (en) * 2019-12-31 2020-10-23 宁波三星智能电气有限公司 Power supply circuit with overvoltage protection circuit
CN114400907A (en) * 2021-12-09 2022-04-26 华荣科技股份有限公司 Radiation-resistant three-phase diode series dual-protection rectifying circuit
CN114400906A (en) * 2021-12-09 2022-04-26 华荣科技股份有限公司 Radiation-resistant three-phase capacitor parallel piezoresistor rectifying circuit

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CB03 Change of inventor or designer information

Inventor after: Zhao Apeng

Inventor after: Huang Haihua

Inventor after: Yuan Longwu

Inventor after: Wang Yade

Inventor after: Zhou Qing

Inventor after: Feng Xiaohua

Inventor before: Wang Yade

Inventor before: Zhou Qing

Inventor before: Tang Shuhua

Inventor before: Liu Baohua

Inventor before: Feng Xiaohua

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Effective date of registration: 20240416

Address after: 518028, 15th Floor, Shenzhen Science and Technology Building, West Shangbu Middle Road, Futian District, Shenzhen City, Guangdong Province (1502-1504, 1506)

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Address before: 201808 No. 555 treasure road, Shanghai, Jiading District

Applicant before: Warom Technology Incorporated Company

Country or region before: China