CN109462322A - A kind of isolation drive with power supply two-in-one circuit is isolated - Google Patents
A kind of isolation drive with power supply two-in-one circuit is isolated Download PDFInfo
- Publication number
- CN109462322A CN109462322A CN201811278960.9A CN201811278960A CN109462322A CN 109462322 A CN109462322 A CN 109462322A CN 201811278960 A CN201811278960 A CN 201811278960A CN 109462322 A CN109462322 A CN 109462322A
- Authority
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- China
- Prior art keywords
- power supply
- isolation
- retarder
- signal
- extraction unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
Abstract
The present invention relates to welding actuation techniques field, disclose a kind of isolation drive with two-in-one circuit of powering be isolated, including transfer unit, isolated power supply extraction unit and isolation signals extraction unit is isolated；Isolation transfer unit includes isolating transformer, and the primary side of isolating transformer is equipped with primary coil, and primary coil input has modulated signal, and modulated signal includes having CF signal, and the secondary side of isolating transformer includes the first retarder and the second retarder；The Same Name of Ends of first retarder is connected with isolated power supply extraction unit, and the Same Name of Ends of the first retarder is connected with isolation signals extraction unit；The non-same polarity of second retarder is connected with isolated power supply extraction unit, and the Same Name of Ends of the first retarder is connected with isolation signals extraction unit；Transfer unit is isolated and transmits modulated signal, isolated power supply extraction unit provides power supply, and isolation signals extraction unit provides control pulse, and an isolating transformer can be achieved with the control isolation of pulse and being isolated for power supply, save the cost.
Description
Technical field
The present invention relates to welding actuation techniques field, more specifically, it relates to a kind of isolation drive be isolated power two
Unify circuit.
Background technique
In the TIG of aluminium and its alloy weldering, since aluminium material surface can be chemically reacted with the oxygen in air, generate
Oxidation film, the fusing point of this oxidation film are much higher than aluminium, such as use the DC TIG welding of positive polarity connection, and weld pool surface is oxidized
Film covering, is unable to reach welding process requirement, and welding not can be carried out.When using negative polarity connection, tungsten bar is anode, and electronics is by work
Part emits to tungsten electrode, has the effect of cleaning oxidation film, but tungsten electrode scaling loss is serious, and weld penetration is inadequate, therefore, it is necessary to using handing over
Galvanic electricity arc is welded, at the same using alternating current arc positive and negative half-wave different role, come reach improve tungsten electrode current-carrying capability with
Larger fusion penetration is obtained, while possessing enough oxidation film cleaning abilities again, be normally carried out welding can.Currently used for aluminum alloy welding
The tig arc welding machine connect is designed with " secondary inverting " circuit, for the low-voltage DC obtained by an inverter circuit to be converted to
Frequency is the low-frequency ac electric current of 50-150HZ.
In the prior art, most of AC-TIG WELDING welding machine all uses secondary inverter circuit as shown in Figure 2, using half-bridge or
Full-bridge circuit carries out current commutation, realizes that high current controls using IGBT single tube or IGBT module parallel, Q2, Q3, Q4 in Fig. 2,
Tetra- IGBT single tube parallel connections of Q5 constitute upper bridge arm, Q7, Q8, and Q9, Q10 constitute lower bridge arm, by main contravariant transformer secondary
Heart tap output electric current.Because secondary inverter circuit upper and lower bridge arm not altogether, therefore two driving signals must be isolated, upper bridge
The ground reference of arm driving signal and the driving signal ground reference of lower bridge arm cannot electrically connect.Fig. 1 is isolated using two-way
Power supply power supply, U3 are the driving chip of upper bridge arm IGBT, and power supply foot is 1,8 feet, and grounding leg 4,5 feet, U6 is lower bridge arm
IGBT driving chip, U6 chip is identical as U3 chip, in order to realize that ground potential is isolated, two DC-DC modules is used, for producing
Two-way power supply VC1, GND1, VC2, the GND2 of raw isolation, power to U3 and U6 respectively.
In order to realize isolation drive, other than power supply need to be isolated, the two-way phase phase difference 180 degree that is provided by control circuit
Trigger pulse A, trigger pulse B are also required to carry out isolation transmission by two optocouplers U2, U5, because DC-DC module internal circuit is multiple
It is miscellaneous and at high cost, and the cost of optocoupler is also higher, therefore existing scheme overall cost is higher, and this gets over cost of competition pressure
Come for bigger welding machine product, weakens the competitiveness of product.
Summary of the invention
Problem in view of the prior art, the present invention provide a kind of isolation drive with power supply two-in-one circuit is isolated, have
The low advantage of circuit cost, can significantly improve the competitiveness of product in market.
To achieve the above object, the present invention provides the following technical scheme that
A kind of isolation drive be isolated power supply two-in-one circuit, including isolation transfer unit, isolated power supply extraction unit and every
From signal extraction unit, the isolated power supply extraction unit has power input and power output end, the power output end
For output isolated power supply, the signal extraction unit has signal input part and signal output end, and the signal output end is used
In output isolation signals；
The isolation transfer unit includes isolating transformer, and the primary side of the isolating transformer is provided with primary coil, described
Primary coil input has modulated signal, and the modulated signal includes having CF signal, and the secondary side of the isolating transformer includes
First retarder and the second retarder；
The Same Name of Ends of first retarder is electrically connected with the power input of an isolated power supply extraction unit,
The Same Name of Ends of first retarder is electrically connected with the signal input part of an isolation signals extraction unit；
The Same Name of Ends of second retarder and first retarder on the contrary, second retarder termination of the same name
Ground potential, the power supply that the non-same polarity of second retarder is electrically connected with an isolated power supply extraction unit are defeated
Enter end, the non-same polarity of second retarder is electrically connected with the signal input of the isolation signals extraction unit
End.
Through the above technical solutions, isolation transfer unit is used for isolated transmission modulated signal, isolated power supply extraction unit is mentioned
The energy in CF signal is taken to provide power supply for driving chip, isolation signals extraction unit then extracts the letter of the modulation in modulated signal
Number control pulse is provided for driving chip, can be achieved with isolation and the power supply of control pulse using an isolating transformer
Isolation, without using additional DC-DC isolated power supply and isolation optocoupler, save the cost.
Further, the frequency of the CF signal be greater than the modulated signal, the frequency of the isolation signals with it is described
The frequency of modulated signal is equal.
Through the above technical solutions, being modulated by modulated signal to carrier frequency, thus the signal for transmitting isolating transformer
Power supply can be provided but also transmit pulse signal.
Further, the isolated power supply extraction unit includes rectifier diode, resistance and zener diode, rectification two
The anode of pole pipe is electrically connected with the cathode of zener diode by resistance, and the both ends of the zener diode are parallel with filtered electrical
Hold；
The anode of the rectifier diode is electrically connected with an end turn of the isolating transformer secondary side, the pressure stabilizing two
The anode of pole pipe is electrically connected with another end of the coil；
The just extremely described power input of the rectifier diode, the cathode of the zener diode are power supply output
End.
Through the above technical solutions, rectifier diode by the AC rectification in coil at direct current, direct current is by steady
Diode is pressed to export DC power supply, resistance carries out current limliting, and filter capacitor increases the quality of DC power supply.
Further, the isolation signals extraction unit includes rectifier diode, resistance, extracts capacitor and extract electricity
The cathode of resistance, rectifier diode is electrically connected by resistance with capacitor is extracted, and the extraction resistance is in parallel with the extraction capacitor；
The anode of the rectifier diode is electrically connected with an end turn of the isolating transformer secondary side, the extraction electricity
Hold one end far from the resistance to be electrically connected with another end of the coil；
The just extremely described signal input part of the rectifier diode, the capacitor and the tie point of the resistance of extracting is described
Signal output end.
Through the above technical solutions, rectifier diode by the AC rectification in coil at modulation pulse direct current,
Pulse direct current exports modulated signal by extracting capacitor and extracting resistance.
Further, the power input and the letter connected on a coil of the isolating transformer secondary side
The electrical connection of number input terminal.
Through the above technical solutions, the time constant filter of isolated power supply extraction unit is determined by resistance and filter capacitor,
The time constant filter of isolation signals extraction unit determines that the time constant filter difference of the two is very by resistance and extraction capacitor
Greatly, therefore modulated signal can be separated from CF signal.
Further, the power output end and the letter connected on a coil of the isolating transformer secondary side
Number output end connects the same driving chip.
Through the above technical solutions, the first retarder is separately connected not with the second retarder as same and model phase
Same driving chip realizes the electrical isolation between driving chip.
Further, first retarder is identical as the coil turn of second retarder.
Through the above technical solutions, the DC power supply and pulse signal of the first retarder and the offer of the second retarder
Amplitude is consistent.
Further, the isolation signals of the output of signal output end described in first retarder are isolated with described second
The isolation signals phase sequence of the output of signal output end described in coil differs 180 degree.
Through the above technical solutions, the first retarder and the second retarder can drive the identical driving chip of model,
And make the working condition of driving chip opposite.
Compared with prior art, the beneficial effects of the present invention are: isolation transfer unit is used for isolated transmission modulated signal, the
One retarder and the second retarder are separately connected not for the identical driving chip of same and model, realize driving chip it
Between electrical isolation；The energy that isolated power supply extraction unit extracts in CF signal provides power supply, isolation signals for driving chip
Extraction unit then extracts the modulated signal in modulated signal and provides control pulse, the filter of isolated power supply extraction unit for driving chip
Wave time constant is determined that the time constant filter of isolation signals extraction unit by resistance and extracts capacitor by resistance and filter capacitor
It determines, the time constant filter of the two is widely different, therefore modulated signal can be separated from CF signal；Use one
A isolating transformer can be achieved with the control isolation of pulse and being isolated for power supply, and electricity is isolated without using isolated DC-DC
Source and isolation optocoupler, save the cost.
Detailed description of the invention
Fig. 1 is the circuit diagram of isolated power supply circuit in the prior art；
Fig. 2 is the circuit diagram of secondary inverter circuit in the prior art；
Fig. 3 is the circuit diagram of the embodiment of the present invention；
Fig. 4 is the waveform diagram of modulated signal and CF signal in the embodiment of the present invention.
Appended drawing reference: 100, transfer unit is isolated；200, isolated power supply extraction unit；300, isolation signals extraction unit；
400, driving chip.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment
A kind of isolation drive with power supply two-in-one circuit is isolated, as shown in figure 3, including isolation transfer unit 100, isolation electricity
Source extraction unit 200 and isolation signals extraction unit 300.It includes isolating transformer T1 that transfer unit 100, which is isolated, and transformation is isolated
The primary side of device T1 is provided with primary coil N1, and primary coil N1 input has modulated signal, and modulated signal includes having CF signal.
As shown in figure 4, the frequency of CF signal is greater than modulated signal, the frequency of isolation signals and the frequency of modulated signal are equal.By adjusting
Signal processed is modulated carrier frequency, so that the signal for transmitting isolating transformer T1 can provide power supply but also transmit pulse letter
Number.Wherein, the frequency of CF signal can be 40KHZ, and the frequency of modulated signal can be 50-120HZ.CF signal and modulated signal
It is square wave.
Return to Fig. 3, the secondary side of isolating transformer T1 includes the first retarder N2 and the second retarder N3, first every
Offline circle N2 is identical as the coil turn of the second retarder N3.The Same Name of Ends of first retarder N2 is electrically connected with an isolation
Power supply extraction unit 200, the Same Name of Ends of the first retarder N2 are electrically connected with an isolation signals extraction unit 300.First every
Offline circle N2 and the second retarder N3 DC power supply provided are consistent with the amplitude of pulse signal.
Isolated power supply extraction unit 200 has power input and power output end, and power output end is for exporting isolation
Power supply.The isolated power supply extraction unit 200 of first retarder N2 Same Name of Ends electrical connection includes rectifier diode D3, resistance R51
And zener diode Z1, the anode of rectifier diode D3 are electrically connected with the cathode of zener diode Z1, pressure stabilizing by resistance R51
The both ends of diode Z1 are parallel with filter capacitor, and filter capacitor includes capacitor C15 and capacitor C16 parallel with one another.Rectify two poles
The anode of pipe D3 is electrically connected with the Same Name of Ends of the first retarder N2, and the anode of zener diode Z1 is with the first retarder N2's
Non-same polarity electrical connection.The just extremely power input of rectifier diode D1, the cathode of zener diode Z1 are power output end,
The just extremely power cathode of zener diode Z1.Rectifier diode D1 is by the AC rectification in the first retarder N2 at direct current
Electricity, direct current export DC power supply by zener diode Z1, and resistance R51 increases the internal resistance of circuit, and filter capacitor increases direct current
The quality of power supply.
Isolation signals extraction unit 300 has signal input part and signal output end, and signal output end is for exporting isolation
Signal.First retarder N2 Same Name of Ends electrical connection isolation signals extraction unit 300 include rectifier diode D5, resistance R58,
It extracting capacitor C20 and extracts resistance R64, the cathode of rectifier diode D5 is electrically connected by resistance R58 with capacitor C20 is extracted,
It is in parallel with capacitor C20 is extracted to extract resistance R64.The anode of rectifier diode D5 is electrically connected with the first retarder N2 Same Name of Ends,
The one end of capacitor C20 far from resistance R58 is extracted to be electrically connected with the first retarder N2 non-same polarity.The anode of rectifier diode D5
For signal input part, the tie point for extracting capacitor C20 and resistance R58 is signal output end.Rectifier diode D5 is isolated first
The AC rectification of coil N2 exports modulated signal by extracting capacitor C20 and extracting resistance R64 at direct current, direct current.
The non-same polarity of second retarder N3 is electrically connected with an isolated power supply extraction unit 200, the second retarder
The non-same polarity of N3 is electrically connected with an isolation signals extraction unit 300.Second retarder N3 non-same polarity electrical connection every
It include rectifier diode D7, resistance R82 and zener diode Z2, the anode of rectifier diode D7 from power supply extraction unit 200
The cathode of zener diode Z2 is electrically connected with by resistance R82, the both ends of zener diode Z2 are parallel with filter capacitor, filtered electrical
Hold includes capacitor C27 and capacitor C28 parallel with one another.The non-same polarity of the anode and the second retarder N3 of rectifier diode D7
The anode of electrical connection, zener diode Z2 is electrically connected with the Same Name of Ends of the second retarder N3.Rectifier diode D7 just extremely
Power input, the cathode of zener diode Z2 are power output end, the just extremely power cathode of zener diode Z2.Rectification two
For pole pipe D7 by the AC rectification in the second retarder N3 at direct current, direct current exports direct current by zener diode Z2
Source, resistance R82 increase the internal resistance of circuit, and filter capacitor increases the quality of DC power supply.
The isolation signals extraction unit 300 of second retarder N3 non-same polarity electrical connection includes rectifier diode D6, electricity
R76 is hindered, capacitor C23 is extracted and extracts resistance R77, the cathode of rectifier diode D6 by resistance R76 and extracts capacitor C23 electricity
It is in parallel with capacitor C23 is extracted to extract resistance R77 for connection.Anode and the second retarder N3 non-same polarity of rectifier diode D6
Electrical connection is extracted the one end of capacitor C23 far from resistance R76 and is electrically connected with the second retarder N3 Same Name of Ends.Rectifier diode D6
Just extremely signal input part, the tie point for extracting capacitor C23 and resistance R76 is signal output end.Rectifier diode D6 is by
The AC rectification of two retarder N3 is at direct current, and direct current is by extracting capacitor C23 and extracting resistance R77 output modulation letter
Number.
The power output end connected on first retarder N2 or the second retarder N3 is connect together with signal output end
TC4420 chip can be used in one driving chip 400, driving chip 400.First retarder N2 and the second retarder N3 points
It does not connect not for the identical driving chip 400 of same and model, realizes the electrical isolation between driving chip 400.
Isolation drive be isolated power supply two-in-one circuit the course of work are as follows: isolation transfer unit 100 be used for isolated transmission
CF signal and modulated signal, isolating transformer T1 is by CF signal and modulated signal from primary coil N1 isolated transmission to first
On retarder N2 and the second retarder N3.Isolated power supply on first retarder N2 or the second retarder N3 extracts
The time constant filter of unit 200 determines by resistance and filter capacitor, on the first retarder N2 or the second retarder N3
Isolation signals extraction unit 300 time constant filter by resistance and extract capacitor determine that the time constant filter of the two is poor
It is different very big, therefore the power extraction of CF signal can be in DC power supply by isolated power supply extraction unit 200, isolation signals are extracted
Unit 300 can separate modulated signal from CF signal.Power input and signal are defeated in first retarder N2
The Same Name of Ends for entering end and the first retarder N2 is electrically connected, power input and signal input part and the in the second retarder N3
The non-same polarity of two retarder N3 is electrically connected, so that the isolation signals that signal output end exports in the first retarder N2 and the
The isolation signals phase sequence that signal output end exports in two retarder N3 differs 180 degree.First retarder N2 is isolated with second
Coil N3 can drive the identical driving chip 400 of model, and make the working condition of driving chip 400 opposite.
It is that driving chip 400 provides power supply, isolation signals that isolated power supply extraction unit 200, which extracts the energy in CF signal,
It is that driving chip 400 provides control pulse that extraction unit 300, which then extracts modulated signal, can be real using an isolating transformer T1
Now control the isolation of pulse and being isolated for power supply, without using isolated DC-DC isolated power supply and isolation optocoupler, save at
This.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of isolation drive be isolated power supply two-in-one circuit, which is characterized in that including isolation transfer unit (100), isolation
Power supply extraction unit (200) and isolation signals extraction unit (300), the isolated power supply extraction unit (200) have power supply
Input terminal and power output end, the power output end are used for output isolated power supply, and the signal extraction unit has signal defeated
Enter end and signal output end, the signal output end is for exporting isolation signals；
The isolation transfer unit (100) includes isolating transformer, and the primary side of the isolating transformer is provided with primary coil,
The primary coil input has modulated signal, and the modulated signal includes having CF signal, the secondary side of the isolating transformer
Including the first retarder and the second retarder；
The power supply that the Same Name of Ends of first retarder is electrically connected with an isolated power supply extraction unit (200) is defeated
Enter end, the Same Name of Ends of first retarder is electrically connected with the signal of an isolation signals extraction unit (300)
Input terminal；
The Same Name of Ends and the first retarder of second retarder are on the contrary, the Same Name of Ends of second retarder is grounded electricity
Position, the non-same polarity of second retarder are electrically connected with the power supply of an isolated power supply extraction unit (200)
Input terminal, the non-same polarity of second retarder are electrically connected with the described of the isolation signals extraction unit (300)
Signal input part.
2. isolation drive according to claim 1 be isolated power supply two-in-one circuit, which is characterized in that the CF signal
Frequency be greater than the modulated signal, the frequency of the isolation signals is equal with the frequency of the modulated signal.
3. isolation drive according to claim 1 be isolated power supply two-in-one circuit, which is characterized in that the isolated power supply
Extraction unit (200) includes rectifier diode, resistance and zener diode, and the anode of rectifier diode is electrically connected by resistance
There is the cathode of zener diode, the both ends of the zener diode are parallel with filter capacitor；
The anode of the rectifier diode is electrically connected with an end turn of the isolating transformer secondary side, the pressure stabilizing two
The anode of pole pipe is electrically connected with another end of the coil；
The just extremely described power input of the rectifier diode, the cathode of the zener diode are power supply output
End.
4. isolation drive according to claim 1 be isolated power supply two-in-one circuit, which is characterized in that the isolation signals
Extraction unit (300) includes rectifier diode, resistance, extracts capacitor and extract resistance, and the cathode of rectifier diode passes through electricity
Resistance is electrically connected with capacitor is extracted, and the extraction resistance is in parallel with the extraction capacitor；
The anode of the rectifier diode is electrically connected with an end turn of the isolating transformer secondary side, the extraction electricity
Hold one end far from the resistance to be electrically connected with another end of the coil；
The just extremely described signal input part of the rectifier diode, the capacitor and the tie point of the resistance of extracting is described
Signal output end.
5. isolation drive according to claim 1 be isolated power supply two-in-one circuit, which is characterized in that the isolation transformation
The power input connected on one coil of device secondary side is electrically connected with the signal input part.
6. isolation drive according to claim 1 be isolated power supply two-in-one circuit, which is characterized in that the isolation transformation
The power output end connected on one coil of device secondary side connect the same driving chip with the signal output end
(400).
7. isolation drive according to claim 1 be isolated power supply two-in-one circuit, which is characterized in that it is described first isolation
Coil is identical as the coil turn of second retarder.
8. isolation drive according to claim 1 be isolated power supply two-in-one circuit, which is characterized in that it is described first isolation
Signal output end described in coil output isolation signals and second retarder described in signal output end output every
180 degree is differed from signal phase sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811278960.9A CN109462322B (en) | 2018-10-30 | 2018-10-30 | Isolated drive and isolated power supply two-in-one circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811278960.9A CN109462322B (en) | 2018-10-30 | 2018-10-30 | Isolated drive and isolated power supply two-in-one circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109462322A true CN109462322A (en) | 2019-03-12 |
| CN109462322B CN109462322B (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5469098A (en) * | 1993-03-29 | 1995-11-21 | Exide Electronics Corporation | Isolated gate drive |
| JP2003299344A (en) * | 2002-04-04 | 2003-10-17 | Yaskawa Electric Corp | Gate drive circuit |
| CN101325376A (en) * | 2007-06-15 | 2008-12-17 | 力博特公司 | Drive circuit for switching element |
| CN203243214U (en) * | 2013-05-29 | 2013-10-16 | 深圳市合兴加能科技有限公司 | Frequency conversion device |
| CN107516994A (en) * | 2017-10-10 | 2017-12-26 | 厦门市爱维达电子有限公司 | A kind of self-powered inverter IGBT drive devices based on Magnetic isolation |
-
2018
- 2018-10-30 CN CN201811278960.9A patent/CN109462322B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5469098A (en) * | 1993-03-29 | 1995-11-21 | Exide Electronics Corporation | Isolated gate drive |
| JP2003299344A (en) * | 2002-04-04 | 2003-10-17 | Yaskawa Electric Corp | Gate drive circuit |
| CN101325376A (en) * | 2007-06-15 | 2008-12-17 | 力博特公司 | Drive circuit for switching element |
| CN203243214U (en) * | 2013-05-29 | 2013-10-16 | 深圳市合兴加能科技有限公司 | Frequency conversion device |
| CN107516994A (en) * | 2017-10-10 | 2017-12-26 | 厦门市爱维达电子有限公司 | A kind of self-powered inverter IGBT drive devices based on Magnetic isolation |
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|---|---|
| CN109462322B (en) | 2020-03-31 |
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