CN206948203U - Voltage adaptive controlling frequency conversion high-voltage DC power supply - Google Patents
Voltage adaptive controlling frequency conversion high-voltage DC power supply Download PDFInfo
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- CN206948203U CN206948203U CN201720389933.3U CN201720389933U CN206948203U CN 206948203 U CN206948203 U CN 206948203U CN 201720389933 U CN201720389933 U CN 201720389933U CN 206948203 U CN206948203 U CN 206948203U
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- transformer
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- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a kind of voltage adaptive controlling frequency conversion high-voltage DC power supply, including the three phase full bridge section rectification thyristor summation current transformer being connected with three-phase alternating-current supply, the output end of three phase full bridge section rectification thyristor is connected with storage capacitor and IGBT inversion modules, the output end of IGBT inversion modules is connected with L/C resonance modules and high voltagehigh frequency silicon rectifier voltage changing module, also include single chip microcomputer main control system and cooling system, single chip microcomputer main control system is connected to three-phase alternating-current supply by power circuit, and cooling system is additionally coupled to three-phase alternating-current supply.The angle of flow of controllable silicon realizes system soft start in regulation three phase full bridge section rectification thyristor, adjust IGBT inversion modules working frequency and realize output pressure regulation, when output needs low voltage, output voltage is turned down in regulation IGBT inversion modules working frequency can combine controllable silicon in regulation three phase full bridge section rectification thyristor angle of flow realization when can not realize, prevent flashover from frequently occurring, improve efficiency of dust collection and device security.
Description
Technical field
The industry electric precipitation control technology field such as coal-burning power plant, metallurgy, building materials, chemical industry, papermaking is the utility model is related to, is
Voltage adaptive controlling frequency conversion high-voltage DC power supply.
Background technology
Electric precipitation high frequency high voltage dc power source at present, it is widely used to coal-burning power plant, metallurgy, building materials, chemical industry, papermaking etc.
Electrostatic precipitation technology field.Generally realize that output voltage, electric current adjust using mode of frequency regulation.Under unmanageable high specific resistance operating mode
The frequent phenomenon of flashover.Single mode of frequency regulation can not ensure that equipment is operated in optimal shape when output parameter is less than 50% rated value
State.
Utility model content
Technical problem to be solved in the utility model be to provide it is a kind of it is safe and reliable, be favorably improved power utilization rate
Voltage adaptive controlling frequency conversion high-voltage DC power supply.
In order to solve the above technical problems, the technical solution of the utility model is：Voltage adaptive controlling frequency conversion high-voltage DC power supply,
Including the three phase full bridge section rectification thyristor being connected with three-phase alternating-current supply, the three phase full bridge section rectification thyristor input
Power circuit is provided with current transformer, and the output end of the three phase full bridge section rectification thyristor is connected with storage capacitor, described
Storage capacitor is parallel with IGBT inversion modules, and the output end of the IGBT inversion modules is connected with L/C resonance modules and high pressure is high
Frequency silicon rectifier voltage changing module, the high voltagehigh frequency silicon rectifier voltage changing module output end is in electric precipitation electric field, in addition to monolithic
Machine master control system and cooling system, the single chip microcomputer main control system are connected to the three-phase alternating-current supply by power circuit, and
Be connected with the three-phase alternating-current supply of the power circuit input control loop switch, the current transformer with it is described
Current sampling circuit, the three phase full bridge section rectification thyristor and the single-chip microcomputer master control are connected between single chip microcomputer main control system
SCR drive modules are connected between system, IGBT is connected between the IGBT inversion modules and the single chip microcomputer main control system
Drive module, the cooling system are additionally coupled to the three-phase alternating-current supply, the IGBT inversion modules and the high voltagehigh frequency
Silicon rectifier voltage changing module is further connected to temperature sampling module, and the temperature sampling module is connected to the single-chip microcomputer master control system
System.
As preferable technical scheme, the high voltagehigh frequency silicon rectifier voltage changing module includes transformer T, the transformer T
Primary side the IGBT drive module is connected to by resonant capacitance C2, the secondary side of the transformer T is connected with rectified current
Road, the output end of the rectification circuit are in series with divider resistance R1, divider resistance R2 and divider resistance R3.
As preferable technical scheme, the L/C resonance modules include the transformer T and resonant capacitance C2.
As preferable technical scheme, the IGBT inversion modules are provided with four IGBT inverters, and the IGBT drives mould
Block includes the IGBT drivers being connected in the single chip microcomputer main control system, and the IGBT drivers are provided with four groups and are used to correspond to
Connect the connection terminal of the IGBT inverters.
As preferable technical scheme, the power circuit includes the transformer being connected on the three-phase alternating-current supply
TC2 first side winding, the secondary side winding of the transformer TC2 include four low pressure windings for exporting 9V voltages and one
The normal voltage winding of 220 voltages is exported, the low pressure winding is respectively connecting to the single chip microcomputer main control system.
As preferable technical scheme, the SCR drive module settings are that installation is connected to the single chip microcomputer main control system
Interior SCR driving chips, the temperature sampling module are arranged to the temperature control core that installation is connected in the single chip microcomputer main control system
Piece.
As preferable technical scheme, the single chip microcomputer main control system includes being used for the switch control for controlling the cooling system
Coremaking piece and touch-screen control chip, the touch-screen control chip are connected with touch-screen, and the single chip microcomputer main control system is also set
There is communication module.
As preferable technical scheme, the cooling system includes the circulated air being connected on the three-phase alternating-current supply
Machine, transformer TC1 first side winding is also associated with the three-phase alternating-current supply, and the secondary side of the transformer TC1 is provided with
Two 220V export winding, wherein the 220V output windings are connected with cooling blower by controlling switch K2, it is another described
220V output windings are connected with cooling pump by controlling switch K3, and the controlling switch K2 and the controlling switch K3 are connected respectively
To the switch control chip.
By adopting the above-described technical solution, the beneficial effects of the utility model are：Pass through single chip microcomputer main control system, regulation
The angle of flow of controllable silicon realizes system soft start, regulation IGBT inversion modules working frequency reality in three phase full bridge section rectification thyristor
Pressure regulation is now exported, regulation can be combined when output needs low voltage, and regulation IGBT inversion modules working frequency can not be realized
The angle of flow of controllable silicon, which is realized, in three phase full bridge section rectification thyristor turns down output voltage, prevents flashover from frequently occurring, raising removes
Dirt efficiency and device security, can also keeping IGBT inversion module working frequencies, constant directly to turn down three phase full bridge section rectification controllable
The angle of flow of controllable silicon, which is realized, in silicon turns down voltage, prevents flashover from frequently occurring, improves power utilization rate.
Brief description of the drawings
The following drawings is only intended to, in doing the utility model schematic illustration and explanation, not limit model of the present utility model
Enclose.Wherein：
Fig. 1 is the structured flowchart of the utility model embodiment；
Fig. 2 is the electrical schematic diagram of the utility model embodiment；
In figure：1- three-phase alternating-current supplies；2- three phase full bridge section rectification thyristors；3-IGBT inversion modules；4-L/C resonant modes
Block；5- high voltagehigh frequency silicon rectifier voltage changing modules；6- single chip microcomputer main control systems；61- touch-screens；62- communication modules；7- radiatings system
System；8- electric precipitation electric fields；9- power circuits；10- current sampling circuits；11-SCR drive modules；12- voltage sample circuits；
13- output sampling circuits；14- temperature sampling modules；15-SCR driving chips；16- Temperature Controlling Chips；17- switch control chips；
18- touch-screen control chips；19-IGBT drive modules.
Embodiment
With reference to the accompanying drawings and examples, the utility model is expanded on further.In the following detailed description, only pass through
Bright mode describes some one exemplary embodiments of the present utility model.Undoubtedly, one of ordinary skill in the art can be with
Recognize, can be with a variety of modes to described in the case of without departing from spirit and scope of the present utility model
Embodiment is modified.Therefore, accompanying drawing and description are inherently illustrative, rather than for limiting the protection of claim
Scope.
As depicted in figs. 1 and 2, voltage adaptive controlling frequency conversion high-voltage DC power supply, including three be connected with three-phase alternating-current supply 1
Phase full-bridge section rectification thyristor 2, the three-phase alternating-current supply 1 are whole using AC380 ± 5%50HZ power supplys, the three phase full bridge section
Stream controllable silicon 2 can be selected using Xi Menkang SKKT series by six controllable silicons three-phase alternating-current supply 1 that is formed by connecting, can root
According to power supply output capacity size, the DC voltage of output is adjusted.The power line of the input of three phase full bridge section rectification thyristor 2
Road is provided with current transformer TA, the current transformer TA and uses just safe BH-0.66-30I 250/1, can be according to place capacity
From dimension model.
Main switching control QF, the master control are connected with the three-phase alternating-current supply 1 on front side of the current transformer TA
System switch QF uses Schneider NSX400N breakers, and the main switching control QF can be according to the capacity of equipment from corresponding rule
Lattice number, the output end of the three phase full bridge section rectification thyristor 2 is connected with storage capacitor C1, the storage capacitor C1 can be with
Using 360uF-1000V electric capacity, dimension model can be selected according to place capacity.The storage capacitor C1 is parallel with IGBT
Inversion module 3, the IGBT inversion modules 3 can select to use Infineon FF600R12ME4, the IGBT inversion modules 3
Output end is connected with L/C resonance modules 4 and high voltagehigh frequency silicon rectifier voltage changing module 5, in addition to single chip microcomputer main control system 6 and radiating
System 7, the cooling system 7 are additionally coupled to the three-phase alternating-current supply 1.
As shown in Fig. 2 the high voltagehigh frequency silicon rectifier voltage changing module 5 includes transformer T, the primary side of the transformer T
The IGBT drive module 19 is connected to by resonant capacitance C2, the secondary side of the transformer T is connected with rectification circuit, described
The output end of rectification circuit is in series with divider resistance R1, divider resistance R2 and divider resistance R3, and the L/C resonance modules 4 include
The transformer T and resonant capacitance C2.The L/C resonance modules 4 use the transformer T direct impedances and extra resonance
Electric capacity is combined mode, realizes IGBT zero-crossing switchings.The output end of high voltagehigh frequency silicon rectifier voltage changing module 5 is located at electric precipitation electricity
In field 8.
IGBT drive module 19 is connected between the IGBT inversion modules 3 and the single chip microcomputer main control system 6, it is described
IGBT inversion modules 3 are provided with four IGBT inverters, and the IGBT drive module 19 includes being connected to the single-chip microcomputer master control system
IGBT drivers on system 6, the IGBT drivers are provided with four groups and are used for the corresponding connection end for connecting the IGBT inverters
Son.The IGBT drive module 19 is controlled using independent TM4C123 single-chip microcomputers, and light is used with the single chip microcomputer main control system 6
Fibre connection, can effectively avoid electromagnetic interference, improve stabilization of equipment performance, prevent the false triggering of IGBT inversion modules 3, reduction is set
Standby security incident and personal safety accident.
The single chip microcomputer main control system 6 is connected to the three-phase alternating-current supply 1, and power supply electricity by power circuit 9
Control loop switch QF1, the current transformer TA and the list are connected with the three-phase alternating-current supply 1 of the input of road 9
Current sampling circuit 10, the three phase full bridge section rectification thyristor 2 and the monolithic owner are connected between piece machine master control system 6
SCR drive modules 11 are connected between control system 6, electricity is connected between the storage capacitor and the single chip microcomputer main control system 6
Sample circuit 12 is pressed, output is connected between the high voltagehigh frequency silicon rectifier voltage changing module 5 and the single chip microcomputer main control system 6 and takes
Sample circuit 13, the IGBT inversion modules 3 and the high voltagehigh frequency silicon rectifier voltage changing module 5 are further connected to temperature sampling mold
Block 14, the temperature sampling module 14 are connected to the single chip microcomputer main control system 6.
The power circuit 9 includes the first side winding for the transformer TC2 being connected on the three-phase alternating-current supply 1, institute
Stating transformer TC2 secondary side winding includes the low pressure winding and a standard electric for exporting 220 voltages of four output 9V voltages
Winding is pressed, the low pressure winding is respectively connecting to the single chip microcomputer main control system 6.
The SCR drive modules 11 are arranged to the SCR driving chips that installation is connected in the single chip microcomputer main control system 6
15, described SCR drive modules 11 have a phase sequence self-recognition function, need not judge phase sequence during installation, can drive reliably, exactly
Six controllable silicons, 2 accurate Regulation Control of three phase full bridge section rectification thyristor is realized, the SCR drive modules 11 are set also in addition
Using TLP521 Phototube Couplings, realize that input/output signal isolation improves equipment anti-interference, there is phase sequence self-recognition function.
The temperature sampling module 14 is arranged to the Temperature Controlling Chip 16 that installation is connected in the single chip microcomputer main control system 6.
The single chip microcomputer main control system 6 includes being used for the switch control chip 17 and touch-screen for controlling the cooling system 7
Control chip 18, the touch-screen control chip 18 are connected with touch-screen 61, and the single chip microcomputer main control system 6 is additionally provided with communication mould
Block 62.The single chip microcomputer main control system 6 uses 32 TM4C123 single-chip microcomputers.The touch-screen 61 leads to MT6070 systems using prestige synthetic fibre
Row, can show a variety of curves and character by software programming, realize friendly human-computer dialogue.Described communication module 62 can basis
Scene needs to select RS485 modes and RS422 modes are realized and upper machine communication, has optical fiber and Modbus TCP/IP etc. more
Kind communication modes expansion interface.
The cooling system 7 includes the circulating fan being connected on the three-phase alternating-current supply 1, the three-phase alternating-current supply
Transformer TC1 first side winding is also associated with 1, the secondary side of the transformer TC1 is provided with two 220V and exports winding,
The wherein one 220V output windings are connected with cooling blower by controlling switch K2, and another 220V outputs winding passes through control
System switch K3 is connected with cooling pump, and the controlling switch K2 and the controlling switch K3 are respectively connecting to the switch control chip
17。
Each external box of microvave of power supply as the structures such as inversion casing be those of ordinary skill in the art known in
Hold, be no longer described in detail.As can be seen here, the present embodiment the cooling system 7 using oil cooling but with air-cooled two systems
Composition.Oil cooling system：The oil temperature of the transformer T is circulated by the heat exchanger in transformer tank body and oil pump, and temperature is passed
Condenser is passed to distribute.Oil storage tank design is installed additional in circulation loop, for oil storage and oil pressure release action.Air-cooled system
System：The circulating fan that rectification, inversion device are installed by inversion box bottom carries out heat dissipation design, and the flow direction of wind is designed by setting
Standby bottom screen pack enters, and from lower to upper, the hot blast on top is sent to atmosphere by inversion box both sides air channel.Device in inversion box
The heat of part was both radiated by circulating fan, was passed to heat in transformer oil simultaneously also by device installation aluminium sheet, by oil cooling
But system is cooled down.
The operation principle of the present embodiment is as described below：
The three-phase alternating-current supply 1 of input delivers to the main switching control QF and control loop switch QF1, realizes
Control is opened/broken to major loop and control loop.The main switching control QF connections current transformer TA, the current transformer
Current signal is also delivered to the current sampling by the TA connections three phase full bridge section rectification thyristor 2, the current transformer TA
Circuit 10, realize primary current detection and protection.The three phase full bridge section rectification thyristor 2 connects the storage capacitor C1, institute
State three phase full bridge section rectification thyristor 2 and output pressure regulation is realized according to described SCR drive modules 11.The storage capacitor C1 connects
Connect, voltage signal is delivered to the voltage sample circuit 12 by the storage capacitor C1, realizes primary voltage detection and protection.It is described
IGBT inverters connect the L/C resonance modules 4, and the IGBT inverters realize frequency modulation according to the IGBT drive module 19,
Temperature signal is delivered to the temperature sampling module 14 by the IGBT inverters, realizes temperature detection and protection.The high pressure is high
Frequency silicon rectifier voltage changing module 5 delivers to temperature signal temperature detection and the protection that the temperature sampling module 14 realizes transformer,
Output voltage and current signal are delivered to output sampling circuit 13 and realize input and output by the high voltagehigh frequency silicon rectifier voltage changing module 5
Closed-loop control.The single chip microcomputer main control system 6 is according to the current sampling circuit 10, the voltage sample circuit 12 and described defeated
Go out sample circuit 13 by signal deliver to the SCR drive modules 11 and the IGBT drive module 19 realize voltage adaptive controlling adjust
Frequency is controlled, and signal is delivered to the cooling fan and realized by the single chip microcomputer main control system 6 according to the temperature sampling module 14 to be dissipated
Air-heater startup/stopping, the single chip microcomputer main control system 6 connect the touch-screen 61 and realize human-computer exchange, the monolithic owner
Control system 6 connects the communication module 62 and realizes remote control.
The utility model is simple in construction, high intelligent control degree is high, using 32 based on TM4C123 series monolithic masters
Control system 6.Controllable silicon in the three phase full bridge section rectification thyristor 2 is controlled using three-phase phase-sequence self-identifying mode, realizes nothing
Pole pressure regulation.It is combined control with adjustment input voltage control output, adjustment incoming frequency control output and voltage regulation and frequency modulation and ensures
Equipment is operated in optimum state.
The signal that described single chip microcomputer main control system 6 can be fed back according to output sampling circuit 13, is accurately switched on or off
Controllable silicon in three phase full bridge section rectification thyristor 2, and adjust the frequency of IGBT inversion modules 3, reach optimum output voltage and defeated
Go out electric current, effectively reduce the internal flashover of electric precipitation electric field 8 and occur, improve efficiency of dust collection.
The utility model is controlled by 32 single-chip microcomputers, and the thyristor operating angle of regulation three phase full bridge section rectification thyristor 2 is real
Existing system soft start, the working frequency of regulation IGBT inversion modules 3 realize output pressure regulation.When output needs low voltage, regulation
The working frequency of IGBT inversion modules 3 can turn down output voltage when can not realize with reference to thyristor operating angle realization is turned down, and prevent
Flashover frequently occurs, and improves efficiency of dust collection and device security；Also the working frequency of regulation IGBT inversion modules 3 can be kept not straighten
Connect turn down thyristor operating angle realize turn down voltage, prevent flashover from frequently occurring, improve power utilization rate.
The advantages of general principle of the present utility model, principal character and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (8)
1. voltage adaptive controlling frequency conversion high-voltage DC power supply, it is characterised in that：Including the three phase full bridge being connected with three-phase alternating-current supply
Section rectification thyristor, the power circuit of the three phase full bridge section rectification thyristor input are provided with current transformer, and described three
The output end of phase full-bridge section rectification thyristor is connected with storage capacitor, and the storage capacitor is parallel with IGBT inversion modules, described
The output end of IGBT inversion modules is connected with L/C resonance modules and high voltagehigh frequency silicon rectifier voltage changing module, the high voltagehigh frequency silicon
Rectifier transformer module output end is in electric precipitation electric field, in addition to single chip microcomputer main control system and cooling system, the single-chip microcomputer
Master control system is connected to the three-phase alternating-current supply, and the three-phase alternating current of the power circuit input by power circuit
Control loop switch is connected with power supply, current sampling is connected between the current transformer and the single chip microcomputer main control system
Circuit, SCR drive modules are connected between the three phase full bridge section rectification thyristor and the single chip microcomputer main control system, it is described
IGBT drive module is connected between IGBT inversion modules and the single chip microcomputer main control system, the cooling system is additionally coupled to institute
Three-phase alternating-current supply is stated, the IGBT inversion modules and the high voltagehigh frequency silicon rectifier voltage changing module are further connected to temperature and taken
Egf block, the temperature sampling module are connected to the single chip microcomputer main control system.
2. voltage adaptive controlling frequency conversion high-voltage DC power supply as claimed in claim 1, it is characterised in that：The high voltagehigh frequency silicon is whole
The primary side that rheology die block includes transformer T, the transformer T is connected to the IGBT drivings mould by resonant capacitance C2
Block, the secondary side of the transformer T are connected with rectification circuit, and the output end of the rectification circuit is in series with divider resistance R1, divided
Piezoresistance R2 and divider resistance R3.
3. voltage adaptive controlling frequency conversion high-voltage DC power supply as claimed in claim 2, it is characterised in that：The L/C resonance modules
Including the transformer T and the resonant capacitance C2.
4. voltage adaptive controlling frequency conversion high-voltage DC power supply as claimed in claim 1, it is characterised in that：The IGBT inversion modules
Provided with four IGBT inverters, the IGBT drive module includes the IGBT drivings being connected in the single chip microcomputer main control system
Device, the IGBT drivers are provided with four groups and are used for the corresponding connection terminal for connecting the IGBT inverters.
5. the voltage adaptive controlling frequency conversion high-voltage DC power supply as described in Claims 1-4 any claim, it is characterised in that：
The power circuit includes the first side winding for the transformer TC2 being connected on the three-phase alternating-current supply, the transformer TC2
Secondary side winding include four output 9V voltages low pressure windings and one output 220 voltages normal voltage winding, it is described
Low pressure winding is respectively connecting to the single chip microcomputer main control system.
6. voltage adaptive controlling frequency conversion high-voltage DC power supply as claimed in claim 1, it is characterised in that：The SCR drive modules
The SCR driving chips that installation is connected in the single chip microcomputer main control system are arranged to, the temperature sampling module is arranged to install
The Temperature Controlling Chip being connected in the single chip microcomputer main control system.
7. voltage adaptive controlling frequency conversion high-voltage DC power supply as claimed in claim 6, it is characterised in that：The single-chip microcomputer master control system
System includes being used for the switch control chip and touch-screen control chip for controlling the cooling system, and the touch-screen control chip connects
Touch-screen is connected to, the single chip microcomputer main control system is additionally provided with communication module.
8. voltage adaptive controlling frequency conversion high-voltage DC power supply as claimed in claim 7, it is characterised in that：The cooling system includes
The circulating fan being connected on the three-phase alternating-current supply, transformer TC1 is also associated with once on the three-phase alternating-current supply
Side winding, the secondary side of the transformer TC1 are provided with two 220V and export winding, wherein a 220V outputs winding passes through control
System switch K2 is connected with cooling blower, and another 220V outputs winding is connected with cooling pump, the control by controlling switch K3
The system switch K2 and controlling switch K3 is respectively connecting to the switch control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720389933.3U CN206948203U (en) | 2017-04-14 | 2017-04-14 | Voltage adaptive controlling frequency conversion high-voltage DC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720389933.3U CN206948203U (en) | 2017-04-14 | 2017-04-14 | Voltage adaptive controlling frequency conversion high-voltage DC power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206948203U true CN206948203U (en) | 2018-01-30 |
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ID=61359408
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|---|---|---|---|
| CN201720389933.3U Active CN206948203U (en) | 2017-04-14 | 2017-04-14 | Voltage adaptive controlling frequency conversion high-voltage DC power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109327013A (en) * | 2018-11-05 | 2019-02-12 | 苏州科技大学 | A kind of series resonance test overtemperature protection system |
-
2017
- 2017-04-14 CN CN201720389933.3U patent/CN206948203U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109327013A (en) * | 2018-11-05 | 2019-02-12 | 苏州科技大学 | A kind of series resonance test overtemperature protection system |
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Address after: 321000 599 peak street, Wucheng District, Jinhua, Zhejiang, 599 Patentee after: Jinhua Zhonghe Environmental Protection Technology Co., Ltd. Address before: 321000 Jinhua, Zhejiang, 966 Jin Fan street, science and technology incubator base 1, 2 floor, 210 rooms. Patentee before: Jinhua Zhonghe Environmental Protection Technology Co., Ltd. |