CN109194146A - A kind of variable-frequency power sources constant pressure and flow seamless switching technique method - Google Patents
A kind of variable-frequency power sources constant pressure and flow seamless switching technique method Download PDFInfo
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- CN109194146A CN109194146A CN201811390565.XA CN201811390565A CN109194146A CN 109194146 A CN109194146 A CN 109194146A CN 201811390565 A CN201811390565 A CN 201811390565A CN 109194146 A CN109194146 A CN 109194146A
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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
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC
- H02M5/04—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters
- H02M5/20—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
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Abstract
The invention discloses a kind of variable-frequency power sources constant pressure and flow seamless switching technique methods, including variable-frequency power sources constant pressure and flow circuit, the variable-frequency power sources constant pressure and flow circuit includes voltage PI conditioning circuit, electric current PI conditioning circuit and gating circuit, the voltage PI conditioning circuit, electric current PI conditioning circuit and gating circuit include the first N chip, first resistor and capacitor, the voltage PI conditioning circuit output end is connect with gating circuit output end, the voltage PI conditioning circuit output end and gating circuit output end are equipped with the 2nd N chip, the 2nd N chip output is equipped with second resistance, the second resistance is set to electric current PI conditioning circuit input terminal.The present invention is by realizing that two seamless automatic switchovers of pi regulator can improve the adaptability of variable-frequency power sources as needing any occasion of variable-frequency power sources constant pressure and constant function to use to reach the constant pressure and flow seamless switching technique requirement of variable-frequency power sources power supply system.
Description
Technical field
The present invention relates to variable-frequency power sources control technology field, in particular to a kind of variable-frequency power sources constant pressure and flow seamless switching skill
Art method.
Background technique
Variable-frequency power sources currently on the market is mainly outlet device debugging aging power supply, import equipment power supply, such change
Frequency power equipment only has pressure-keeping functions, but part Experiment room or experimental check mechanism need to have constant pressure and flow and cut automatically
The variable-frequency power sources equipment changed, therefore such equipment is unable to satisfy actual needs, and there are no with seamless switching in the prior art
The variable-frequency power sources of function.
Therefore, it is necessary to solve the above problems to invent a kind of variable-frequency power sources constant pressure and flow seamless switching technique method.
Summary of the invention
The purpose of the present invention is to provide a kind of variable-frequency power sources constant pressure and flow seamless switching technique methods, by realizing two
Automatic switchover that pi regulator is seamless, thus reached the constant pressure and flow seamless switching technique requirement of variable-frequency power sources power supply system, it can
The adaptability of variable-frequency power sources is improved, to solve above-mentioned back as needing any occasion of variable-frequency power sources constant pressure and constant function to use
The problem of being proposed in scape technology.
To achieve the above object, the invention provides the following technical scheme: a kind of variable-frequency power sources constant pressure and flow seamless switching skill
Art method, including variable-frequency power sources constant pressure and flow circuit, the variable-frequency power sources constant pressure and flow circuit include voltage PI conditioning circuit, electricity
PI conditioning circuit and gating circuit are flowed, the voltage PI conditioning circuit, electric current PI conditioning circuit and gating circuit include first
N1 chip, first resistor and capacitor, the voltage PI conditioning circuit output end are connect with 4 output end of gating circuit, the voltage
PI conditioning circuit output end and gating circuit output end are equipped with the 2nd N1 chip, and the 2nd N1 chip output is equipped with the second electricity
Resistance, the second resistance are set to electric current PI conditioning circuit input terminal；
The output voltage preset level signal GU and change that the voltage PI conditioning circuit input terminal input variable-frequency power sources control occurs
The Voltage Feedback level signal VF of frequency power output acquisition；
The output given value of current level signal GI and variable-frequency power sources that the gating circuit input terminal input variable-frequency power sources control occurs
Export the current feedback level signal IF of acquisition；
Voltage preset level signal U_ref after the electric current PI conditioning circuit output end output conditioning；
Wherein, specifically comprise the following steps:
Step 1: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
Feedback level signal VF is combined into a voltage PI regulator；
Step 2: the output given value of current level signal GI that variable-frequency power sources control occurs and the electric current of variable-frequency power sources output acquisition are anti-
Feedback level signal IF is combined into an electric current pi regulator；
Step 3: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
The output given value of current level signal GI that the voltage PI regulator that is combined into of feedback level signal VF and variable-frequency power sources control occur with
The electric current pi regulator that the current feedback level signal IF of variable-frequency power sources output acquisition is combined into is existed by two diode synthesis
Together, new signal G1, the signal that G1 is negative at this time are formed, and U_ref needs positive signal；
Step 4: signal G1 is again by changing the signal being positive, thus the final signal U_ref needed with amiable reversed.
Preferably, the output given value of current level signal GU specific value range that the variable-frequency power sources control occurs is set as
0-5V/DC。
Preferably, the Voltage Feedback level signal VF specific value range of the variable-frequency power sources output acquisition is set as -5-
0V/DC。
Preferably, the output given value of current level signal GI specific value range that the variable-frequency power sources control occurs is set as
0-5V/DC。
Preferably, the current feedback level signal IF specific value range of the variable-frequency power sources output acquisition is set as -5-
0V/DC。
Preferably, the first N1 chip and the 2nd N1 chip are disposed as TL084 chip.
Preferably, the variable-frequency power sources constant pressure and flow circuit 1 further includes diode and voltage-stabiliser tube.
Preferably, the voltage preset level signal U_ref is the level signal of 0-10V/DC.
Technical effect and advantage of the invention: the present invention is given by the output voltage that variable-frequency power sources control occurs for setting
Level signal GU and the Voltage Feedback level signal VF of variable-frequency power sources output acquisition are combined into a voltage PI regulator and make
The current feedback level signal of output given value of current level signal GI and variable-frequency power sources output acquisition that variable-frequency power sources control occurs
IF is combined into an electric current pi regulator, in order to when variable-frequency power sources is in unloaded or constant-pressure operation, at electric current pi regulator
In de-synchronization state, output signal IPI output is -10V or more, electric at this time close to the reverse power supply voltage -12V of the 2nd N1 chip 6
Pressure pi regulator works, and when variable-frequency power sources output electric current reaches, voltage PI regulator is in de-synchronization state, output signal
UPI output is -10 or more, and close to the reverse power supply voltage -12V of the 2nd N1 chip 6, electric current pi regulator works at this time, from
And realize two seamless automatic switchovers of pi regulator, the constant pressure and flow seamless switching technique for having reached variable-frequency power sources power supply system is wanted
It asks, the adaptability of variable-frequency power sources can be improved as needing any occasion of variable-frequency power sources constant pressure and constant function to use.
Detailed description of the invention
Fig. 1 is constant pressure and flow conditioning circuit structural schematic diagram of the invention.
In figure: 1 variable-frequency power sources constant pressure and flow circuit, 2 voltage PI conditioning circuits, 3 electric current PI conditioning circuits, 4 gating circuits,
5 the oneth N1 chips, 6 the 2nd N1 chips, 7 second resistances.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
The present invention provides a kind of variable-frequency power sources constant pressure and flow seamless switching technique methods as shown in Figure 1, including variable-frequency power sources
Constant pressure and flow circuit 1, the variable-frequency power sources constant pressure and flow circuit 1 include voltage PI conditioning circuit 2,3 and of electric current PI conditioning circuit
Gating circuit 4, the variable-frequency power sources constant pressure and flow circuit 1 further include diode and voltage-stabiliser tube, the voltage PI conditioning circuit 2,
Electric current PI conditioning circuit 3 and gating circuit 4 include the first N1 chip 5, first resistor and capacitor, the voltage PI conditioning circuit
2 output ends are connect with 4 output end of gating circuit, and 2 output end of voltage PI conditioning circuit and 4 output end of gating circuit are equipped with the
Two N1 chips 6, the first N1 chip 5 and the 2nd N1 chip 6 are disposed as TL084 chip, 6 output end of the 2nd N1 chip
Equipped with second resistance 7, the second resistance 7 is set to 3 input terminal of electric current PI conditioning circuit；
The output voltage preset level signal GU and change that 2 input terminal of the voltage PI conditioning circuit input variable-frequency power sources control occurs
The Voltage Feedback level signal VF of frequency power output acquisition, the output given value of current level signal that the variable-frequency power sources control occurs
GU specific value range is set as 0V/DC, the Voltage Feedback level signal VF specific value model of the variable-frequency power sources output acquisition
It encloses and is set as -5V/DC；
The output given value of current level signal GI and variable-frequency power sources that 4 input terminal of the gating circuit input variable-frequency power sources control occurs
Current feedback the level signal IF, the output given value of current level signal GI that the variable-frequency power sources control occurs for exporting acquisition are specific
Numberical range is set as 0V/DC, the current feedback level signal IF specific value range setting of the variable-frequency power sources output acquisition
For -5V/DC；
Voltage preset level signal U_ref after 3 output end of the electric current PI conditioning circuit output conditioning, the given electricity of the voltage
Ordinary mail U_ref is the level signal of 0V/DC.
The present invention also provides a kind of variable-frequency power sources constant pressure and flow seamless switching technique methods as shown in Figure 1, specific to wrap
Include following steps:
Step 1: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
Feedback level signal VF is combined into a voltage PI regulator；
Step 2: the output given value of current level signal GI that variable-frequency power sources control occurs and the electric current of variable-frequency power sources output acquisition are anti-
Feedback level signal IF is combined into an electric current pi regulator；
Step 3: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
The output given value of current level signal GI that the voltage PI regulator that is combined into of feedback level signal VF and variable-frequency power sources control occur with
The electric current pi regulator that the current feedback level signal IF of variable-frequency power sources output acquisition is combined into is existed by two diode synthesis
Together, new signal G1, the signal that G1 is negative at this time are formed, and U_ref needs positive signal；
Step 4: signal G1 is again by changing the signal being positive, thus the final signal U_ref needed with amiable reversed.
Variable-frequency power sources is in de-synchronization state in unloaded or constant-pressure operation, electric current pi regulator at this time, and output signal IPI is defeated
It is out -10V or more, close to the reverse power supply voltage -12V of the 2nd N1 chip 6, voltage PI regulator works at this time.
Embodiment 2
The present invention provides a kind of variable-frequency power sources constant pressure and flow seamless switching technique methods as shown in Figure 1, including variable-frequency power sources
Constant pressure and flow circuit 1, the variable-frequency power sources constant pressure and flow circuit 1 include voltage PI conditioning circuit 2,3 and of electric current PI conditioning circuit
Gating circuit 4, the variable-frequency power sources constant pressure and flow circuit 1 further include diode and voltage-stabiliser tube, the voltage PI conditioning circuit 2,
Electric current PI conditioning circuit 3 and gating circuit 4 include the first N1 chip 5, first resistor and capacitor, the voltage PI conditioning circuit
2 output ends are connect with 4 output end of gating circuit, and 2 output end of voltage PI conditioning circuit and 4 output end of gating circuit are equipped with the
Two N1 chips 6, the first N1 chip 5 and the 2nd N1 chip 6 are disposed as TL084 chip, 6 output end of the 2nd N1 chip
Equipped with second resistance 7, the second resistance 7 is set to 3 input terminal of electric current PI conditioning circuit；
The output voltage preset level signal GU and change that 2 input terminal of the voltage PI conditioning circuit input variable-frequency power sources control occurs
The Voltage Feedback level signal VF of frequency power output acquisition, the output given value of current level signal that the variable-frequency power sources control occurs
GU specific value range is set as 3V/DC, the Voltage Feedback level signal VF specific value model of the variable-frequency power sources output acquisition
It encloses and is set as -3V/DC；
The output given value of current level signal GI and variable-frequency power sources that 4 input terminal of the gating circuit input variable-frequency power sources control occurs
Current feedback the level signal IF, the output given value of current level signal GI that the variable-frequency power sources control occurs for exporting acquisition are specific
Numberical range is set as 3V/DC, the current feedback level signal IF specific value range setting of the variable-frequency power sources output acquisition
For -3V/DC；
Voltage preset level signal U_ref after 3 output end of the electric current PI conditioning circuit output conditioning, the given electricity of the voltage
Ordinary mail U_ref is the level signal of 5V/DC.
The present invention also provides a kind of variable-frequency power sources constant pressure and flow seamless switching technique methods as shown in Figure 1, specific to wrap
Include following steps:
Step 1: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
Feedback level signal VF is combined into a voltage PI regulator；
Step 2: the output given value of current level signal GI that variable-frequency power sources control occurs and the electric current of variable-frequency power sources output acquisition are anti-
Feedback level signal IF is combined into an electric current pi regulator；
Step 3: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
The output given value of current level signal GI that the voltage PI regulator that is combined into of feedback level signal VF and variable-frequency power sources control occur with
The electric current pi regulator that the current feedback level signal IF of variable-frequency power sources output acquisition is combined into is existed by two diode synthesis
Together, new signal G1, the signal that G1 is negative at this time are formed, and U_ref needs positive signal；
Step 4: signal G1 is again by changing the signal being positive, thus the final signal U_ref needed with amiable reversed.
Embodiment 3
The present invention provides a kind of variable-frequency power sources constant pressure and flow seamless switching technique methods as shown in Figure 1, including variable-frequency power sources
Constant pressure and flow circuit 1, the variable-frequency power sources constant pressure and flow circuit 1 include voltage PI conditioning circuit 2,3 and of electric current PI conditioning circuit
Gating circuit 4, the variable-frequency power sources constant pressure and flow circuit 1 further include diode and voltage-stabiliser tube, the voltage PI conditioning circuit 2,
Electric current PI conditioning circuit 3 and gating circuit 4 include the first N1 chip 5, first resistor and capacitor, the voltage PI conditioning circuit
2 output ends are connect with 4 output end of gating circuit, and 2 output end of voltage PI conditioning circuit and 4 output end of gating circuit are equipped with the
Two N1 chips 6, the first N1 chip 5 and the 2nd N1 chip 6 are disposed as TL084 chip, 6 output end of the 2nd N1 chip
Equipped with second resistance 7, the second resistance 7 is set to 3 input terminal of electric current PI conditioning circuit；
The output voltage preset level signal GU and change that 2 input terminal of the voltage PI conditioning circuit input variable-frequency power sources control occurs
The Voltage Feedback level signal VF of frequency power output acquisition, the output given value of current level signal that the variable-frequency power sources control occurs
GU specific value range is set as 5V/DC, the Voltage Feedback level signal VF specific value model of the variable-frequency power sources output acquisition
It encloses and is set as 0V/DC；
The output given value of current level signal GI and variable-frequency power sources that 4 input terminal of the gating circuit input variable-frequency power sources control occurs
Current feedback the level signal IF, the output given value of current level signal GI that the variable-frequency power sources control occurs for exporting acquisition are specific
Numberical range is set as 5V/DC, the current feedback level signal IF specific value range setting of the variable-frequency power sources output acquisition
For 0V/DC；
Voltage preset level signal U_ref after 3 output end of the electric current PI conditioning circuit output conditioning, the given electricity of the voltage
Ordinary mail U_ref is the level signal of 10V/DC.
The present invention also provides a kind of variable-frequency power sources constant pressure and flow seamless switching technique methods as shown in Figure 1, specific to wrap
Include following steps:
Step 1: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
Feedback level signal VF is combined into a voltage PI regulator；
Step 2: the output given value of current level signal GI that variable-frequency power sources control occurs and the electric current of variable-frequency power sources output acquisition are anti-
Feedback level signal IF is combined into an electric current pi regulator；
Step 3: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
The output given value of current level signal GI that the voltage PI regulator that is combined into of feedback level signal VF and variable-frequency power sources control occur with
The electric current pi regulator that the current feedback level signal IF of variable-frequency power sources output acquisition is combined into is existed by two diode synthesis
Together, new signal G1, the signal that G1 is negative at this time are formed, and U_ref needs positive signal；
Step 4: signal G1 is again by changing the signal being positive, thus the final signal U_ref needed with amiable reversed.
The electric current of variable-frequency power sources output at this time reaches, and voltage PI regulator be in de-synchronization state, and output signals UP I output is-
10 or more, close to the reverse power supply voltage -12V of the 2nd N1 chip 6, electric current pi regulator works at this time.
In summary: when variable-frequency power sources is in unloaded or constant-pressure operation, electric current pi regulator is in de-synchronization state, output
Signal IPI output is -10V or more, and close to the reverse power supply voltage -12V of the 2nd N1 chip 6, voltage PI regulator is acted as at this time
With, when variable-frequency power sources output electric current reaches, voltage PI regulator be in de-synchronization state, output signals UP I output be -10 with
On, close to the reverse power supply voltage -12V of the 2nd N1 chip 6, electric current pi regulator works at this time, to realize two PI tune
Save the seamless automatic switchover of device.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (8)
1. a kind of variable-frequency power sources constant pressure and flow seamless switching technique method, including variable-frequency power sources constant pressure and flow circuit (1), feature
Be: the variable-frequency power sources constant pressure and flow circuit (1) includes voltage PI conditioning circuit (2), electric current PI conditioning circuit (3) and gating
Circuit (4), the voltage PI conditioning circuit (2), electric current PI conditioning circuit (3) and gating circuit (4) include the first N1 chip
(5), first resistor and capacitor, voltage PI conditioning circuit (2) output end are connect with gating circuit (4) output end, the electricity
PI conditioning circuit (2) output end and gating circuit (4) output end is pressed to be equipped with the 2nd N1 chip (6), the 2nd N1 chip (6) is defeated
Outlet is equipped with second resistance (7), and the second resistance (7) is set to electric current PI conditioning circuit (3) input terminal；
Output voltage preset level signal GU that voltage PI conditioning circuit (2) input terminal input variable-frequency power sources control occurs and
The Voltage Feedback level signal VF of variable-frequency power sources output acquisition；
The output given value of current level signal GI and variable-frequency electric that gating circuit (4) the input terminal input variable-frequency power sources control occurs
The current feedback level signal IF of source output acquisition；
Voltage preset level signal U_ref after electric current PI conditioning circuit (3) the output end output conditioning；
Wherein, specifically comprise the following steps:
Step 1: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
Feedback level signal VF is combined into a voltage PI regulator；
Step 2: the output given value of current level signal GI that variable-frequency power sources control occurs and the electric current of variable-frequency power sources output acquisition are anti-
Feedback level signal IF is combined into an electric current pi regulator；
Step 3: the output voltage preset level signal GU that variable-frequency power sources control occurs and the voltage of variable-frequency power sources output acquisition are anti-
The output given value of current level signal GI that the voltage PI regulator that is combined into of feedback level signal VF and variable-frequency power sources control occur with
The electric current pi regulator that the current feedback level signal IF of variable-frequency power sources output acquisition is combined into is existed by two diode synthesis
Together, new signal G1, the signal that G1 is negative at this time are formed, and U_ref needs positive signal；
Step 4: signal G1 is again by changing the signal being positive, thus the final signal U_ref needed with amiable reversed.
2. a kind of variable-frequency power sources constant pressure and flow seamless switching technique method according to claim 1, it is characterised in that: described
The output given value of current level signal GU specific value range that variable-frequency power sources control occurs is set as 0-5V/DC.
3. a kind of variable-frequency power sources constant pressure and flow seamless switching technique method according to claim 1, it is characterised in that: described
The Voltage Feedback level signal VF specific value range of variable-frequency power sources output acquisition is set as -5-0V/DC.
4. a kind of variable-frequency power sources constant pressure and flow seamless switching technique method according to claim 1, it is characterised in that: described
The output given value of current level signal GI specific value range that variable-frequency power sources control occurs is set as 0-5V/DC.
5. a kind of variable-frequency power sources constant pressure and flow seamless switching technique method according to claim 1, it is characterised in that: described
The current feedback level signal IF specific value range of variable-frequency power sources output acquisition is set as -5-0V/DC.
6. a kind of variable-frequency power sources constant pressure and flow seamless switching technique method according to claim 1, it is characterised in that: described
First N1 chip (5) and the 2nd N1 chip (6) are disposed as TL084 chip.
7. a kind of variable-frequency power sources constant pressure and flow seamless switching technique method according to claim 1, it is characterised in that: described
Variable-frequency power sources constant pressure and flow circuit (1) further includes diode and voltage-stabiliser tube.
8. a kind of variable-frequency power sources constant pressure and flow seamless switching technique method according to claim 1, it is characterised in that: described
Voltage preset level signal U_ref is the level signal of 0-10V/DC.
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| CN201811390565.XA CN109194146A (en) | 2018-11-21 | 2018-11-21 | A kind of variable-frequency power sources constant pressure and flow seamless switching technique method |
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| CN2553414Y (en) * | 2002-07-05 | 2003-05-28 | 北京通力环电气股份有限公司 | PWM type high frenquency switch power supply constant voltage/constant current controller |
| CN101960922A (en) * | 2008-03-24 | 2011-01-26 | 东芝照明技术株式会社 | Power supply units and lighting fixtures |
| CN103384075A (en) * | 2013-07-03 | 2013-11-06 | 武汉鑫双易科技开发有限公司 | Low-ripple-wave lithium battery charging and discharging achieving method |
| CN104935063A (en) * | 2015-06-18 | 2015-09-23 | 电子科技大学 | A Battery Pulse Positive and Negative Impulse Charging Converter |
| CN107598339A (en) * | 2017-09-21 | 2018-01-19 | 上海广为焊接设备有限公司 | Multi-functional inverter type welder system with double pi regulators |
-
2018
- 2018-11-21 CN CN201811390565.XA patent/CN109194146A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2553414Y (en) * | 2002-07-05 | 2003-05-28 | 北京通力环电气股份有限公司 | PWM type high frenquency switch power supply constant voltage/constant current controller |
| CN101960922A (en) * | 2008-03-24 | 2011-01-26 | 东芝照明技术株式会社 | Power supply units and lighting fixtures |
| CN103384075A (en) * | 2013-07-03 | 2013-11-06 | 武汉鑫双易科技开发有限公司 | Low-ripple-wave lithium battery charging and discharging achieving method |
| CN104935063A (en) * | 2015-06-18 | 2015-09-23 | 电子科技大学 | A Battery Pulse Positive and Negative Impulse Charging Converter |
| CN107598339A (en) * | 2017-09-21 | 2018-01-19 | 上海广为焊接设备有限公司 | Multi-functional inverter type welder system with double pi regulators |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |