CN208209832U - bipolar pulse generator - Google Patents
bipolar pulse generator Download PDFInfo
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- CN208209832U CN208209832U CN201820856528.2U CN201820856528U CN208209832U CN 208209832 U CN208209832 U CN 208209832U CN 201820856528 U CN201820856528 U CN 201820856528U CN 208209832 U CN208209832 U CN 208209832U
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- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 230000005611 electricity Effects 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 4
- 210000001367 artery Anatomy 0.000 claims description 3
- 210000003462 vein Anatomy 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000001131 transforming effect Effects 0.000 claims description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Abstract
The utility model provides a kind of technically bipolar pulse generator easy to accomplish, including DC power supply unit, resonance-inversion unit, pulse transformer and secondary side output unit；The DC power supply unit includes two DC power supplies, two DC support capacitors and two choke coils；Resonance-the inversion unit includes two resonant capacitances and two resonant switch.Can obtain one in such a way that resonant transformation adds full-bridge inverting the utility model frequency is adjustable, amplitude is adjustable, positive negative pulse stuffing quantity is than adjustable bipolar pulse generator, have many advantages, such as high-efficient, simple structure, convenient control, low in cost.
Description
Technical field:
A kind of the utility model category field of power conversion, and in particular to bipolar pulse generator.
Background technique:
With the development of power electronics technology, Switching Power Supply is all widely used in every profession and trade, as switch electricity
The one kind in source, controlled resonant converter are in the industry cycle widely applied due to the advantages such as its high efficiency, simple.
It requires to provide microsecond rank, the power supply plan of Bi-Directional Pulsed Voltage Technique, such as electrostatic in many applications at present
The fields such as dust removal field, VOCs removing, wastewater zero discharge.The utility model proposes a kind of new topological structures, pass through resonance
The mode of transformation plus full-bridge inverting provides one, and frequency is adjustable, amplitude is adjustable, positive negative pulse stuffing quantity is than adjustable bipolar pulse
Generator has many advantages, such as high-efficient, simple structure, convenient control, low in cost.
Summary of the invention:
The purpose of this utility model is to provide a kind of novel bipolar pulse generators technically easy to accomplish.
The specific technical solution of the utility model is as follows:
A kind of bipolar pulse generator, including DC power supply unit, resonance-inversion unit, pulse transformer 15 and pair
Side output unit；The DC power supply unit includes two DC power supplies, two DC support capacitors and two choke coils；It is described
Resonance-inversion unit includes two resonant capacitances and two resonant switch；Wherein, 1 first output end of the first DC power supply and
After one direct current Support Capacitor, 3 first output end is connected, after the first choke coil 5, all the way through the first resonant switch 7 and pulse transforming
15 input terminal a of device is connected；Another way is connected through resonant capacitance 13 with pulse transformer input terminal b after the first choke coil 5；Through
There are also be connected through third resonant switch 9 with pulse transformer input terminal c all the way after one choke coil 5；First DC power supply 1 second is defeated
After outlet is connected with 3 second output terminal of the first DC support capacitor and place of working 23 is connected；Second DC power supply 2 first is defeated
Outlet is connected after being connected with 4 first output end of the second DC support capacitor with place of working 23,2 second output terminal of the second DC power supply
After being connected with 5 second output terminal of the second DC support capacitor, all the way through the second resonant switch 8 and pulse after the second choke coil 6
Transformer inputs a is connected；Another way is connected through resonant capacitance 14 with pulse transformer input terminal b after the second choke coil 6；Through
There are also be connected through the 4th resonant switch 10, resonant inductance 17 with pulse transformer input terminal c all the way after second choke coil 6；Pulse
Transformer primary winding centre tap b is connected with place of working 23.
The further design of the utility model is:
Resonance-inversion unit further includes the first resonant inductance 16 and the second resonant inductance 17, the connection of the first resonant inductance 16
Between 15 input terminal a of the first resonant switch 7 and pulse transformer；Second resonant inductance 17 is connected to 9 He of third resonant switch
Between 15 input terminal c of pulse transformer；
Or first resonant inductance 16 be connected between 15 centre tap b of the first resonant capacitance 13 and pulse transformer；The
Two resonant inductances 17 are connected between 15 centre tap b of the second resonant capacitance 14 and pulse transformer or the second resonant inductance 17
It is connected between the second choke coil 6 and the second resonant capacitance 14；
Or first resonant inductance 16 be connected between the first choke coil 5 and the first resonant capacitance 13；Second resonant inductance
17 are connected between the second choke coil 6 and the second resonant capacitance 14 or the second resonant inductance 17 is connected to the second resonant capacitance 14
Between 15 centre tap b of pulse transformer.
The bipolar pulse generator further includes the first protection location 11 and the second protection location 12；First protection location 11
First output end and 13 first output end of the first resonant capacitance are connected, 11 second output terminal of the first protection location and the first resonance electricity
Hold 13 second output terminals to be connected；Second protection location, 12 first output end and 14 first output end of the second resonant capacitance are connected, the
Two protection locations, 12 second output terminal is connected with 14 second output terminal of the second resonant capacitance.
First protection location 11 and the second protection location 12 use passive clamping absorbing circuit, such as RCD, RC form, or
Person's active clamp circuit, protection location can choose whether to use according to practical application request, for protecting resonant switch 7-
10,
The bipolar pulse generator further includes magnetic core bias unit, including choke coil 18 and current-limiting resistance 19, clamp electricity
Appearance 21 and DC power supply 20,20 first output end of DC power supply are defeated through current-limiting resistance 19, choke coil 18 and pulse transformer
Outlet d is connected, and second output terminal is connected with pulse transformer output end e；21 first output end of clamping capacitance is through choke coil
18 are connected with pulse transformer output end d, and second output terminal is connected with pulse transformer output end e.
The pair side output unit is load 22, and load 22 is in parallel using capacitive load, resistive and capacitive load；Pulse becomes
Depressor Ausgang is connected with 22 first output ends of load, and pulse transformer output end g is connected with 22 second output terminals of load.
The first, second resonant capacitance capacitance is equal；The first, second resonant inductance inductance value is equal.
Two or more expansible units of the resonance-inversion unit of the utility model are formed in parallel.
The DC power supply can be any type of DC voltage source, such as three-phase rectifier power supply, three phase ac voltage regulation
Power supply, DC voltage regulator power supply or any type of Switching Power Supply.
The resonant switch 7-10 uses semiconductor switch IGBT, IGCT or GTO.
What the utility model was compared with the prior art has the beneficial effect that
The utility model is bipolar to realize in such a way that a resonance-inversion unit adds pulse transformer output all the way
Property pulse output, and pulse frequency can be adjusted by changing resonant switch working frequency, and impulse amplitude can be straight by adjusting
Power source voltage amplitude is flowed to adjust, meanwhile, positive negative pulse stuffing is adjusted by changing the frequency that two groups of resonant switch work alternatively
Quantity ratio, it might even be possible to export positive pulse or negative pulse always.
The voltage being applied on resonant switch can be reduced to the 1/2 of total DC bus-bar voltage by the utility model, effectively
The voltage stress of resonant switch is reduced, so as to effectively reduce system using the switching device of low voltage stress
Application cost, and be conducive to the design of resonant switch protection circuit.
The bipolar pulse generator of the utility model is full symmetric from topological structure, can effectively reduce system
Differential mode noise can effectively reduce noise current to other portions of system in addition, transformer primary winding centre tap is grounded
The influence divided.
Since resonant switch is not simply to connect in working condition in the utility model, individual resonant switch and its
Corresponding resonant capacitance, resonant inductance can independently constitute resonant tank, so when one group of resonant switch driving is asynchronous, no
It will appear the case where single resonant switch is damaged since receiving voltage stress is excessive.
In addition, in the case that resonant switch current stress is constant in single resonance-inversion unit, it can be by parallel multiple
Resonance-inversion unit increases the output power of system.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of the example of the utility model 1；
Fig. 2 is the structural schematic diagram of the example of the utility model 2；
Fig. 3 is the structural schematic diagram of the example of the utility model 3；
Fig. 4 is the structural schematic diagram of the example of the utility model 4；
Fig. 5 is the structural schematic diagram of the example of the utility model 5；
Fig. 6 is the structural schematic diagram of the example of the utility model 6.
Fig. 7 is the structural schematic diagram that 7 primary side resonant element of the example of the utility model is extended to Unit 2.
Fig. 8 is that 8 primary side resonant element of the example of the utility model is extended to multiunit structural schematic diagram.
Fig. 9 is the output positive pulse equivalent operation circuit of example 1.
Figure 10 is the output negative pulse equivalent operation circuit of example 1.
Figure 11 is 1 positive negative pulse stuffing and 1 negative pulse alternating output waveform figure of example 1.
Figure 12 is 2 positive pulses and 2 negative pulse alternating output waveform figures of example 1.
Figure 13 is the n positive pulse and m negative pulse alternating output waveform figure of example 1.
In figure: the first DC power supply of 1- 1；The second DC power supply of 2-；3- the first DC support capacitor；The second DC support of 4-
Capacitor；The first choke coil of 5-；The second choke coil of 6-；The first resonant switch of 7-；The second resonant switch of 8-；9- third resonance is opened simultaneously；
The 4th resonant switch of 10-；The first protection location of 11-；The second protection location of 12-；The first resonant capacitance of 13-；14- the second resonance electricity
Hold；15- pulse transformer；The first resonant inductance of 16-；The second resonant inductance of 17-；18- choke coil；19- current-limiting resistance；20- is straight
Galvanic electricity source；21- clamping capacitance；22- load；23- indicates place of working；24- choke coil；25- choke coil.
Specific embodiment:
With reference to the accompanying drawing, technical solutions of the utility model are further elaborated as follows.
Example 1
As shown in Figure 1, the bipolar pulse generator of the utility model, including DC power supply unit, resonance-inversion list
Member, pulse transformer 15, magnetic core bias unit, absorptive unit and secondary side output unit.
As shown in Figure 1, specifically 1 first output end of the first DC power supply and the output of the first DC support capacitor 3 first
After end is connected, it is connected through the first choke coil 5, the first resonant switch 7, resonant inductance 16 with 15 input terminal a of pulse transformer, through the
One choke coil 5, the first resonant capacitance 13 are connected with 15 input terminal b of pulse transformer, through the first choke coil 5, third resonant switch
9, the second resonant inductance 17 is connected with 15 input terminal c of pulse transformer, 1 second output terminal of the first DC power supply and the first direct current branch
Support 3 second output terminal of capacitor is connected after being connected with place of working 23.
As shown in Figure 1, specifically 2 first output end of the second DC power supply and the output of the second DC support capacitor 4 first
End is connected after being connected with place of working 23,5 second output terminal phase of 2 second output terminal of the second DC power supply and the first DC support capacitor
Lian Hou is connected through the second choke coil 6, the second resonant switch 8, the first resonant inductance 16 with 15 input terminal a of pulse transformer, through
Two choke coils 6, the second resonant capacitance 14 are connected with 15 input terminal b of pulse transformer, through the first choke coil 5, the 4th resonant switch
10, the second resonant inductance 17 is connected with 15 input terminal c of pulse transformer.
As shown in Figure 1, specifically 13 first output end of 11 first output end of the first protection location and the first resonant capacitance
It is connected, 11 second output terminal of the first protection location is connected with 13 second output terminal of the first resonant capacitance.
As shown in Figure 1, specifically 14 first output end of 12 first output end of the second protection location and the second resonant capacitance
It is connected, 12 second output terminal of the second protection location is connected with 14 second output terminal of the second resonant capacitance.
As shown in Figure 1, specifically pair side output unit is load 22, load 22 can be capacitive load, resistive and appearance
Property load it is in parallel.Pulse transformer Ausgang is connected with 22 first output ends of load, pulse transformer output end g and load 22
Second output terminal is connected.
As shown in Figure 1, magnetic core bias unit, including choke coil 18 and current-limiting resistance 19, clamping capacitance 21 and DC power supply
20,20 first output end of DC power supply is connected through current-limiting resistance 19, choke coil 18 with pulse transformer output end d, and second
Output end is connected with pulse transformer output end e；21 first output end of clamping capacitance is through choke coil 18 and pulse transformer
Output end d is connected, and second output terminal is connected with pulse transformer output end e.
The working principle of the utility model is as follows:
Below by taking attached drawing 1 as an example, the concrete operating principle of the utility model is described:
First, second DC power supply gives resonance electricity to the first resonant capacitance 13, the second choke coil 6 by the first choke coil 5
Hold 14 charging, control circuit control the first, the 4th resonant switch (7,10) open to be formed resonant tank give transformer secondary provide
Energy, resonance circuit include 15 primary side of transformer, the first resonant switch 7, the 4th resonant switch 10, third, the 4th resonant capacitance
(13,14) and the first, second resonant inductance (16,17), circuit output positive pulse, equivalent operation circuit are as shown in Figure 9 at this time；Control
Second, third resonant switch (8,9) of circuit control processed open to be formed resonant tank give transformer secondary provide energy, resonance circuit
Including 15 primary side of transformer, the second resonant switch 8, third resonant switch 9, the first, second resonant capacitance (13,14) and first,
Second resonant inductance (16,17), circuit output negative pulse, equivalent operation circuit are as shown in Figure 10 at this time.
Primary waves shape is as figs 11-13, it can be seen that is adjusted by changing the frequency that two groups of resonant switch work alternatively
Save the quantity ratio of positive negative pulse stuffing, it might even be possible to export positive pulse or negative pulse always.Figure 11 is that 1 positive negative pulse stuffing and 1 are negative
Pulse alternately exports, and Figure 12 is that 2 positive negative pulse stuffings and 2 negative pulses alternately export, and Figure 13 is n positive negative pulse stuffing and m negative arteries and veins
Punching alternately exports, and is always negative pulse output when n is 0, is always positive pulse output when m is 0.
The equivalent resonant circuit of Fig. 1 as shown in figs. 9-10, by equivalent resonant circuit and main waveform as it can be seen that load both ends
The pulse voltage duration of voltage u2 is determined by the resonant parameter of equivalent resonant circuit, by Analysis of Equivalent Circuit it is found that same
In the case where DC bus-bar voltage, pulse transformer no-load voltage ratio is bigger, and the amplitude of u2 is bigger, while the pulse voltage duration gets over
Greatly.It in certain applications, needs to control the pulse voltage duration, at this time just needs to reduce pulse transformer no-load voltage ratio, together
Shi Zengjia DC bus-bar voltage is to keep output voltage amplitude, and the problem that this can bring resonant switch voltage stress high, leads
It causes system cost and the expense of the part of circuit is protected to increase, and the utility model in a resonance circuit due to having connected 2
The voltage stress of resonant switch is reduced 1/2 by a resonant switch, to reduce the cost of system.
On the other hand, the topology that the utility model uses is full symmetric in structure, can effectively reduce the difference of system
Mode noise can effectively reduce noise current to system other parts in addition, transformer primary winding centre tap is grounded
Influence.
On the other hand, individually humorous since resonant switch is not simply to connect in working condition in the utility model
Vibration switchs resonant capacitance corresponding with its, resonant inductance can independently constitute resonant tank, so when one group of resonant switch driving
It is not in the case where single resonant switch is damaged since receiving voltage stress is excessive when asynchronous.In addition in single resonance-
In the case that resonant switch current stress is constant in inversion unit, system can be increased by multiple resonance-inversion units in parallel
Output power.
Example 2
As shown in Fig. 2, this example and example 1 are the difference is that arteries and veins can be used in the first, second resonant inductance (16,17)
The leakage inductance of transformer is rushed to replace, suitable inductance can be obtained by rationally designing the parameter of pulse transformer.
Example 3
As shown in figure 3, this example exists with example 1 the difference is that the first resonant inductance 16 and the second resonant inductance 17
It is different the location of in circuit.First resonant inductance 16 is connected to the first resonant capacitance 13 and 15 centre tap of pulse transformer
Between b；Second resonant inductance 17 is connected between 15 centre tap b of the second resonant capacitance 14 and pulse transformer.
Example 4
As shown in figure 4, this example exists with example 1 the difference is that the first resonant inductance 16 and the second resonant inductance 17
It is different the location of in circuit.First resonant inductance 16 is connected between the first choke coil 5 and the first resonant capacitance 13；Second
Resonant inductance 17 is connected between the second choke coil 6 and the second resonant capacitance 14.
Example 5
As shown in figure 5, this example exists with example 1 the difference is that the first resonant inductance 16 and the second resonant inductance 17
It is different the location of in circuit.First resonant inductance 16 is connected between the first choke coil 5 and the first resonant capacitance 13；Second
Resonant inductance 17 is connected between 15 centre tap b of the second resonant capacitance 14 and pulse transformer.
Example 6
As shown in fig. 6, this example exists with example 1 the difference is that the first resonant inductance 16 and the second resonant inductance 17
It is different the location of in circuit.First resonant inductance 16 is connected to the first resonant capacitance 13 and 15 centre tap of pulse transformer
Between b；Second resonant inductance 17 is connected between the second choke coil 6 and the second resonant capacitance 14.
Example 7
As shown in fig. 7, examples detailed above 1 is to example 6, the resonant switch current stress in single resonance-inversion unit is constant
In the case of, the output power of system can be increased by 2 resonance-inversion units in parallel.
As shown in fig. 7, the transformer primary side circuit of extension is powered using second group of DC power supply, but this is not required
, the first output end of the first DC power supply 1 can also be connected to resonant switch 24 only with one group of DC power supply, the
The second output terminal of two DC power supplies 2 is connected to resonant switch 25, and the second output terminal of the first DC power supply 1 is connected to place of working
23, the first output end of the second DC power supply 2 is connected to place of working 23.
Example 8
It, can be by simultaneously in the case that resonant switch current stress is constant in single resonance-inversion unit in examples detailed above 7
Join 2 resonance-inversion units to increase the output power of system, but be not limited to only extend 2 tunnels, can need to extend according to application
More multichannel, as shown in Figure 8.
Example 9
Examples detailed above 1 uses place of working 23 into example 8, and place of working is commonly attached to the earth, but this is not this
Utility model is necessary, even if place of working 23 is not connected to the earth, nor affects on the application of this converter.
Example 10
Preferably, examples detailed above 1 removes example 2 to example 8() in the first resonant inductance 16 and the electricity of the second resonant inductance 17
Inductance value is identical, and resonant capacitance 13 is identical with 14 capacitance of resonant capacitance, but this is not necessary to the utility model, even if
The parameter of the parameter of one resonant inductance 16 and the second resonant inductance 17, the first resonant capacitance 13 and the second resonant capacitance 14 not phase
Together, the practical application of this converter is nor affected on.
The above content is combine specific preferred embodiment further detailed description of the utility model, and it cannot be said that
The specific implementation of the utility model is confined to the above explanation.For those skilled in the art of the present invention
For, without departing from the concept of the premise utility, several simple deduction or replace can also be made, all should be considered as belonging to
In the protection scope of the utility model.
Claims (10)
1. a kind of bipolar pulse generator, it is characterized in that: including DC power supply unit, resonance-inversion unit, pulse transformer
(15) and secondary side output unit；The DC power supply unit is gripped including two DC power supplies, two DC support capacitors and two
Stream circle；Resonance-the inversion unit includes two resonant capacitances and two resonant switch；Wherein, the first DC power supply (1) first
After output end is connected with (3) first output end of the first DC support capacitor, after the first choke coil (5), all the way through the first resonance
Switch (7) is connected with pulse transformer input terminal a；Another way becomes through resonant capacitance (13) and pulse after the first choke coil (5)
Depressor input terminal b is connected；There are also all the way through third resonant switch (9) and pulse transformer input terminal c after the first choke coil (5)
It is connected；First DC power supply second output terminal be connected with the first DC support capacitor second output terminal after and place of working (23) phase
Even；Second the first output end of DC power supply and second the first output end of DC support capacitor are connected after being connected with place of working (23),
It is latter through the second choke coil (6) after second DC power supply second output terminal is connected with the second DC support capacitor second output terminal
The second resonant switch of road (8) is connected with pulse transformer input terminal a；Another way is through resonant capacitance after the second choke coil (6)
(14_ is connected with pulse transformer input terminal b；There are also all the way through the 4th resonant switch (10), resonance after the second choke coil (6)
Inductance (17) is connected with pulse transformer input terminal c；Pulse transformer primary side winding centre tap b is connected with place of working (23).
2. bipolar pulse generator according to claim 1, it is characterized in that: resonance-inversion unit further includes first humorous
Vibration inductance (16) and the second resonant inductance (17), the first resonant inductance (16) are connected to the first resonant switch (7) and pulse transforming
Between device (15) input terminal a；Second resonant inductance (17) is connected to third resonant switch (9) and pulse transformer (15) input terminal
Between c；
Or first resonant inductance (16) be connected between the first resonant capacitance (13) and pulse transformer (15) centre tap b；
Second resonant inductance (17) is connected between the second resonant capacitance (14) and pulse transformer (15) centre tap b or second is humorous
Vibration inductance (17) is connected between the second choke coil (6) and the second resonant capacitance (14)；
Or first resonant inductance (16) be connected between the first choke coil (5) and the first resonant capacitance (13)；Second resonance electricity
Sense (17) is connected between the second choke coil (6) and the second resonant capacitance (14) or the second resonant inductance (17) is connected to second
Between resonant capacitance (14) and pulse transformer (15) centre tap b.
3. bipolar pulse generator according to claim 2, it is characterized in that: the bipolar pulse generator further includes
One protection location (11) and the second protection location (12)；(11) first output end of first protection location and the first resonant capacitance (13)
First output end is connected, and the first protection location (11) second output terminal is connected with the first resonant capacitance (13) second output terminal；The
(12) first output end of two protection locations and (14) first output end of the second resonant capacitance are connected, the second protection location (12) second
Output end and the second resonant capacitance (14) second output terminal are connected.
4. bipolar pulse generator according to claim 3, it is characterized in that: the first protection location (11) and the second protection
Unit (12) uses passive clamping absorbing circuit or active clamp circuit.
5. bipolar pulse generator according to claim 3, it is characterized in that: further including magnetic core bias unit, magnetic core is inclined
Setting unit includes choke coil (18) and current-limiting resistance (19), clamping capacitance (21) and DC power supply (20), the DC power supply
(20) first output ends are connected through current-limiting resistance (19), choke coil (18) with pulse transformer output end d, second output terminal and arteries and veins
Transformer output end e is rushed to be connected；(21) first output end of clamping capacitance is through choke coil (18) and pulse transformer output end d
It is connected, second output terminal is connected with pulse transformer output end e.
6. bipolar pulse generator according to claim 5, it is characterized in that: the pair side output unit is load
(22), load (22) is in parallel using capacitive load, resistive and capacitive load；Pulse transformer Ausgang and load (22) first
Output end is connected, and pulse transformer output end g is connected with load (22) second output terminal.
7. bipolar pulse generator according to claim 6, it is characterized in that: the first, second resonant capacitance capacitance phase
Deng；First, second resonant inductance inductance value is equal.
8. bipolar pulse generator according to claim 1,2,3,4,5,6 or 7, it is characterized in that: wherein resonance-inversion
Two or more expansible units of unit are formed in parallel.
9. bipolar pulse generator according to claim 8, it is characterized in that: the DC power supply is using three phase rectifier electricity
Source, three phase ac voltage regulation power supply, DC voltage regulator power supply or Switching Power Supply.
10. bipolar pulse generator according to claim 8, it is characterized in that: the resonant switch is opened using semiconductor
Close IGBT, IGCT or GTO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820856528.2U CN208209832U (en) | 2018-06-01 | 2018-06-01 | bipolar pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820856528.2U CN208209832U (en) | 2018-06-01 | 2018-06-01 | bipolar pulse generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208209832U true CN208209832U (en) | 2018-12-07 |
Family
ID=64496044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820856528.2U Withdrawn - After Issue CN208209832U (en) | 2018-06-01 | 2018-06-01 | bipolar pulse generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208209832U (en) |
-
2018
- 2018-06-01 CN CN201820856528.2U patent/CN208209832U/en not_active Withdrawn - After Issue
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Granted publication date: 20181207 Effective date of abandoning: 20231024 |
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