CN101860201A - Method for realizing voltage equalizing during serial connection of multiple high-frequency power electronic devices - Google Patents
Method for realizing voltage equalizing during serial connection of multiple high-frequency power electronic devices Download PDFInfo
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Abstract
The invention discloses a method for realizing voltage equalizing during the serial connection of multiple high-frequency power electronic devices. In the method, the steady voltage equalizing of n high-frequency power electronic switches is achieved by arranging a voltage equalizing circuit formed by the serial connection of a capacitor and a high-frequency transformer coil on each high-frequency power electronic switch; and a clamping circuit formed by a diode and a clamping capacitor is connected into each high-frequency power electronic switch, the dynamic voltage equalizing is realized by utilizing the clamping capacitor to absorb overvoltage charges in the moving state, and the overvoltage charges absorbed in the moving state are released to a power supply through a high-frequency transformer in the steady state. The invention can realize static voltage equalizing, dynamic voltage equalizing and energy feedback when the plurality of high power electronic devices are serially connected and is beneficial to reducing the cost and prompting the development and the application of the power electronic technology with high voltage, high frequency, high power in industry.
Description
Technical field
The present invention relates to realize all methods of pressure when a plurality of high-frequency power electronic devices are connected, belong to electric and electronic technical field.
Background technology
Under high voltage operation, a device is not enough, often needs several devices to be together in series and bears high voltage.All pressures problem when connecting in order to solve multitube, current practice can reduce four classes.
Two reverse conducting triode thyristor series connection of first kind way: Fig. 1 (a) expression.For two pipes are all pressed, RC resistance capaciting absorpting circuit in parallel on every pipe.But they can cause sizable loss, and are especially higher at voltage, frequency is higher, di/dt and dv/dt are big and require all to press occasions such as better.This is the simplest way of all pressing, and effect is the poorest.Be operated in device under the high frequency for high-frequency power electronic (as insulated gate bipolar transistor) etc.The way of Fig. 1 (a) is inappropriate often, because the RC capacitance-resistance can not be definitely noninductive, can only accomplish low sense.This small inductance does not have much influences when low frequency, but appreciable impact is arranged when high frequency.And the loss of resistance capaciting absorpting circuit is bigger during high frequency.Moreover the multitube series connection time often needs to select the close pipe of turn-off characteristic and matches series connection, and this is not difficult to accomplish in manufactory, and just relatively more difficult need change a pipe to user factory the time.
The second class way: clamper power consumption way.Shown in Fig. 1 (b), two high-frequency power electronic pipe series connection.At every pipe two ends and connect stable-pressure device with voltage-stabiliser tube signal.Voltage-stabiliser tube carries out clamper, the further rising of deboost when the terminal voltage of pipe surpasses the threshold voltage of voltage-stabiliser tube.It is very simple that this way seems, but in fact will form a plurality of independently regulated power electronic circuit more complicated under high voltage, and efficient is also lower.Perhaps also can consume this energy, go in the other clamp circuit, but how the energy that charges into clamp circuit feeds back to power supply, more complicated and this energy filled into without voltage stabilizing circuit.The energy that some device will charge into clamp circuit consumes with bypass resistance, but this loss is very big under high-frequency work.
The 3rd class way, the drive system of controlling each main switch is to reach dynamic voltage balancing, and it is had relatively high expectations to control, is in mostly at present in the research and development, can't be applicable to more the series connection of random pipe under various conditions of work.
The 4th class way also is present way with the most use: be exactly to adopt complexity such as many level, tandem type and the main circuit of costliness solves.
Summary of the invention
The low-cost method of all pressing of realizing when the purpose of this invention is to provide a kind of a plurality of high-frequency power electronic devices series connection.
The technical solution adopted for the present invention to solve the technical problems is: the equalizer circuit that is composed in series by electric capacity and high-frequency transformer coils in parallel on each high-frequency power electronic switch makes n high-frequency power electronic switch steady-state pressure; On each high-frequency power electronic switch, insert the clamp circuit of forming by diode and clamp capacitor, utilize clamp capacitor dynamically the time, to receive the overvoltage electric charge, realize the dynamic electric voltage clamper, and the overvoltage electric charge that receives when dynamic by high-frequency transformer coils is discharged into power supply when stable state.Concrete technical scheme is as follows:
Scheme 1:
When connecting, realize a plurality of high-frequency power electronic devices all methods of pressure, be attempted by both ends of power after it is characterized in that n high-frequency power electronic switch that is connected in series and load R connecting, the two ends shunt capacitance C of power supply, load R goes up anti-and diode D, the equalizer circuit that is composed in series by capacitor C 1 and high-frequency transformer coils Lm in parallel on each high-frequency power electronic switch, n high-frequency transformer coils Lm equal turn numbers and on same high-frequency core, steady-state pressure is realized in n 〉=2;
At each high-frequency transformer coils Lm two ends and connect the series circuit of forming by diode D1 and clamp capacitor C2, wherein, with diode D1 two ends an auxiliary electron switch G, auxiliary electron switch G and the conducting of high-frequency power electronic switch complementary in parallel of first high-frequency power electronic switch and the series circuit that connects.Between the tie point of the diode D1 of adjacent series circuit and clamp capacitor C2, insert diode D2, the negative electrode of next stage diode D2 is received the anode of upper level diode D2, the electric charge that charges into when dynamic during the high-frequency power electronic switch is opened among n-1 the clamp capacitor C2 except that first by diode D2 all is pooled among the clamp capacitor C2 that is attempted by first high-frequency power electronic switch, utilize clamp capacitor C2, the series circuit clamper of diode D1 and capacitor C 1, dynamically the time, receive the overvoltage electric charge, realize dynamic voltage balancing, and the overvoltage electric charge that receives when dynamic by high-frequency transformer coils Lm is discharged into power supply when stable state.
The further feature of scheme 1 is, the energy back circuit that is composed in series by n voltage doubling rectifing circuit in the both ends of power parallel connection, each voltage doubling rectifing circuit comprises the capacitor C m of two diode in series Dm, two series connection and the high frequency transformer secondary coil Lm ' that is coupled with high-frequency transformer coils Lm, the end of high frequency transformer secondary coil Lm ' links to each other with the tie point of two diode in series Dm, and the other end links to each other with the tie point of the capacitor C m of two series connection.
The further feature of another of scheme 1 is that n high-frequency power electronic switch that is connected in series and capacitor C 1, diode D1, clamp capacitor C2 and the diode D2 that is attempted by each high-frequency power electronic switch ends are encapsulated in the module.
Scheme 2
When connecting, realize a plurality of high-frequency power electronic devices all methods of pressure, be attempted by both ends of power after it is characterized in that n high-frequency power electronic switch that is connected in series and load R connecting, the two ends shunt capacitance C of power supply, load R goes up anti-and diode D, the equalizer circuit that is composed in series by capacitor C 1-1 and high-frequency transformer coils Lm-1 in parallel on each high-frequency power electronic switch, n high-frequency transformer coils Lm-1 equal turn numbers and on same high-frequency core, steady-state pressure is realized in n 〉=2;
At each high-frequency transformer coils Lm-1 two ends and connect the series circuit of forming by diode D-1 and clamp capacitor C2-1, at the diode D1-1 two ends of each series circuit difference auxiliary electron switch G-1 in parallel, auxiliary electron switch G-1 and the conducting of high-frequency power electronic switch complementary, utilize the series circuit clamper of capacitor C 1-1, diode D1-1 and clamp capacitor C2-1, dynamically the time, receive the overvoltage electric charge, realize dynamic voltage balancing, and the overvoltage electric charge that receives when dynamic by high-frequency transformer coils Lm-1 is discharged into power supply when stable state.
Beneficial effect of the present invention is:
The present invention utilizes clamp capacitor to receive the overvoltage electric charge when the high-frequency power electronic switch is dynamic, and the overvoltage electric charge that utilizes high frequency transformer to discharge when high-frequency power electronic switch stable state to receive is to power supply, all presses when realizing a plurality of high-frequency power electronic devices series connection.Steady-state pressure when the present invention can realize the series connection of a plurality of high-frequency power electronic devices, dynamic voltage balancing, energy back.Help reducing cost and promote development and the application in industry of high voltage, high-frequency power electronic technology.
Description of drawings
When being the thyristor series connection, Fig. 1 (a) all presses with resistance capaciting absorpting circuit.
All press with voltage stabilizing circuit when (b) being the series connection of high-frequency power electronic switch.
Fig. 2 utilizes the basic circuit diagram of high frequency transformer steady-state pressure when being n high-frequency power electronic switch series connection.
Fig. 3 (a) is the voltage relationship of next high-frequency power electronic switch ends of on-state; (b) be the voltage relationship of next high-frequency power electronic switch ends of off-state.
Fig. 4 is first kind of instantiation circuit diagram of the present invention program's 1 method.
Fig. 5 is second kind of instantiation circuit diagram of the present invention program's 1 method.
Fig. 6 is the third instantiation circuit diagram of the present invention program's 1 method.
Fig. 7 is a kind of instantiation circuit diagram of the present invention program's 2 methods.
Embodiment
The theoretical foundation of the inventive method steady-state pressure is referring to Fig. 2, Fig. 3, the high-frequency power electronic K switch 1 that is connected in series at n among Fig. 2, K2 ... the circuit by capacitor C 1 and high-frequency transformer coils Lm series connection in parallel on each high-frequency power electronic switch of Kn, n high-frequency power electronic K switch 1, K2 ... during the Kn conducting, the terminal voltage Uk of each high-frequency power electronic switch is bordering on zero U
K=U
C1+ U
Lm≈ 0.This moment the voltage U c1 on each electric capacity must with the voltage U of the high-frequency transformer coils that is in series with it
LmEqual and opposite, shown in Fig. 3 (a).Because the voltage of each high-frequency transformer coils is all equal, U
Lm-1=U
Lm-2=...=U
Lm-nSo the voltage on each electric capacity also must equate.
U
C1-1＝U
C1-2＝...＝U
C1-n。
When n high-frequency power electronic switch turn-offs, U
K=U
C1+ U
LmCapacitance voltage Uc1 on each high-frequency power electronic switch can very fast change, and they are still equal substantially.The voltage U of each high-frequency transformer coils that is in series with it
LmAlso because of equating on same transformer, but polarity is identical with capacitance voltage polarity, shown in Fig. 3 (b).So the terminal voltage of each high-frequency power electronic switch also equates, U
K1=U
K2=...=U
Kn, promptly each high-frequency power electronic switch is all pressed.
The key of dynamic voltage balancing of the present invention is to utilize clamp capacitor to receive the overvoltage electric charge dynamically the time, utilizes high-frequency transformer coils to discharge this electric charge to power supply when stable state.
Further specify the present invention below in conjunction with accompanying drawing.Following specific embodiment is used for the present invention that explains, rather than limits the invention, and in the protection range of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Scheme 1:
With reference to Fig. 4, when connecting, realize a plurality of high-frequency power electronic devices all methods of pressure, the high-frequency power electronic K switch 1 that n is connected in series, K2 ... Kn be attempted by power supply Ud two ends after load R connects, the two ends shunt capacitance C of power supply, load R goes up anti-and diode D, the equalizer circuit that is composed in series by capacitor C 1 and high-frequency transformer coils Lm in parallel on each high-frequency power electronic switch, n high-frequency transformer coils Lm equal turn numbers and on same high-frequency core, steady-state pressure is realized in n 〉=2;
At each high-frequency transformer coils Lm two ends and connect the series circuit of forming by diode D1 and clamp capacitor C2, wherein, with diode D1 two ends an auxiliary electron switch G, auxiliary electron switch G and the conducting of high-frequency power electronic switch complementary in parallel of first high-frequency power electronic K switch 1 and the series circuit that connects.Between the tie point of the diode D1 of adjacent series circuit and clamp capacitor C2, insert diode D2, the negative electrode of next stage diode D2 is received the anode of upper level diode D2, the electric charge that charges into when dynamic during the high-frequency power electronic switch is opened among n-1 the clamp capacitor C2 except that first by diode D2 all is pooled among the clamp capacitor C2 that is attempted by first high-frequency power electronic K switch 1, utilize clamp capacitor C2, the series circuit clamper of diode D1 and capacitor C 1, dynamically the time, receive the overvoltage electric charge, realize dynamic voltage balancing, and the overvoltage electric charge that receives when dynamic by high-frequency transformer coils Lm is discharged into power supply when stable state.The polarity of diode D1, auxiliary electron switch G will satisfy the requirement that discharges and recharges like this.
Operation principle:
(1) turn off process
When having overvoltage to produce on the high-frequency power electronic K switch 1, the series circuit of utilization and high-frequency power electronic K switch 1 corresponding diode D1, clamp capacitor C2 and capacitor C 1 carries out clamper to high-frequency power electronic K switch 1.The diode D1 corresponding with first high-frequency power electronic switch is open-minded, capacitor C 1, the clamp capacitor C2 corresponding with it are recharged, the capacitor C 1 that is recharged, clamp capacitor C2 have limited the rising of high-frequency power electronic K switch 1 both end voltage, make high-frequency power electronic K switch 1 both end voltage all the time clamper realize dynamic voltage balancing at rated operational voltage.
Fill into the capacitor C 1 corresponding with first high-frequency power electronic switch, the energy of clamp capacitor C2 must discharge.Energy on the clamp capacitor C2 of first high-frequency power electronic switch correspondence discharges to the high-frequency transformer coils Lm of correspondence by auxiliary electron switch G, make the voltage rising at the high-frequency transformer coils Lm two ends corresponding with first high-frequency power electronic switch, owing to n high-frequency transformer coils Lm equal turn numbers and on same high-frequency core, so the voltage at other n-1 high-frequency transformer coils Lm two ends all raises, by n high-frequency transformer coils Lm and n capacitor C 1 connect clamper the time energy back that absorbs in the capacitor C that is connected in parallel on both ends of power.While n capacitor C 1 and the voltage sum of n high-frequency transformer coils Lm total voltage sum greater than n high-frequency power electronic switch ends, this part energy that exceeds will be discharged in the capacitor C that is connected in parallel on both ends of power, realize energy back.
When having overvoltage to produce on other n-1 the high-frequency power electronic switches, high-frequency power electronic K switch 2 ... when the last voltage of Kn is higher than the capacitor C corresponding with it 1 and adds voltage on the clamp capacitor C2, high-frequency power electronic K switch 2 ... each self-corresponding diode D1 conducting of Kn, each self-corresponding capacitor C 1, clamp capacitor C2 begin to be recharged, energy release principle was identical when the release of energy was turn-offed with K1 on the capacitor C 1 that is recharged, and no longer too much described herein.The release that the clamp capacitor C2 that is recharged goes up energy will all be pooled to except that the electric charge among the n-1 first the clamp capacitor C2 among the clamp capacitor C2 that is attempted by first electronic switch correspondence during the high-frequency power electronic switch is opened by diode D2, clamp capacitor C2 by first electronic switch correspondence discharges again, it is identical that clamp capacitor C2 energy when this moment, exergonic principle was turn-offed with K1 discharges principle, no longer too much describes herein.
(2) opening process
Can occur each high-frequency power electronic switch when opening equally and bear the uneven problem of voltage.The high-frequency power electronic switching voltage that clamp circuit can limit in the opening process equally is no more than rated value.
The further feature of scheme 1, with reference to Fig. 5, the circuit of the energy back that is composed in series by n voltage doubling rectifing circuit in power supply Ud two ends parallel connection, each voltage doubling rectifing circuit comprises the capacitor C m of two diode in series Dm, two series connection and the high frequency transformer secondary coil Lm ' that is coupled with high-frequency transformer coils Lm, the end of high frequency transformer secondary coil Lm ' links to each other with the tie point of two diode in series Dm, and the other end links to each other with the tie point of the capacitor C m of two series connection.
When n high-frequency power electronic switch conduction with when turn-offing, its dynamic voltage balancing principle is identical with Fig. 4, but the overvoltage electric charge that clamp capacitor receives dynamically the time can be discharged among the power supply Ud with voltage doubling rectifing circuit by high frequency transformer secondary coil Lm '.
In order to reduce the influence of connecting line distributed inductance, can with n high-frequency power electronic K switch 1 being connected in series, K2 ... Kn and the capacitor C 1, diode D1, clamp capacitor C2 and the diode D2 that are attempted by each high-frequency power electronic switch ends are encapsulated in the module.If it is big inadequately directly to be connected the clamp capacitor capacity of inside modules, can be as shown in Figure 6, in parallel more respectively in each high-frequency power electronic switch ends by diode D1 ', the series circuit of clamp capacitor C2 ' and capacitor C 1 ', with this series circuit and n high-frequency power electronic K switch 1, K2, Kn is contained in the module, the negative pole of each high-frequency power electronic switch ends capacitor C 1 ' is linked to each other with the negative pole of the capacitor C 1 of corresponding switch ends separately respectively, the negative electrode of the diode D1 ' of first high-frequency power electronic K switch 1 correspondence is linked to each other with the negative electrode of diode D1, insert diode D2 ' between the tie point of adjacent diode D1 ' and clamp capacitor C2 ', the negative electrode of next stage diode D2 ' is received the anode of upper level diode D2 '.In order further to reduce the influence of connecting line distributed inductance, series resistance r on the negative electrode of the diode D1 ' that also can adopt and the connecting line that the negative electrode of diode D1 links to each other in first high-frequency power electronic K switch 1 correspondence.
When n high-frequency power electronic switch conduction with when turn-offing, its steady-state pressure, dynamic voltage balancing are identical with energy back principle and Fig. 4.
Scheme 2:
Referring to Fig. 7, when connecting, realize a plurality of high-frequency power electronic devices all methods of pressure, the high-frequency power electronic K switch 1 that n is connected in series, K2 ... Kn be attempted by power supply Ud two ends after load R connects, the two ends shunt capacitance C of power supply, load R goes up anti-and diode D, the equalizer circuit that is composed in series by capacitor C 1-1 and high-frequency transformer coils Lm-1 in parallel on each high-frequency power electronic switch, n high-frequency transformer coils Lm-1 equal turn numbers and on same high-frequency core, steady-state pressure is realized in n 〉=2;
At each high-frequency transformer coils Lm-1 two ends and connect the series circuit of forming by diode D1-1 and clamp capacitor C2-1, at the diode D1-1 two ends of each series circuit difference auxiliary electron switch G-1 in parallel, auxiliary electron switch G-1 and the conducting of high-frequency power electronic switch complementary, the overvoltage that such circuit makes the high-frequency power electronic switch may occur when turn-offing can be by capacitor C 1-1, diode D1-1, the series circuit clamper of clamp capacitor C2-1, dynamically the time, receive the overvoltage electric charge, realize dynamic voltage balancing, the electric charge that charges into during clamper can be when stable state discharges through auxiliary electron switch G-1, and the overvoltage electric charge that receives when dynamic by high-frequency transformer coils Lm-1 when stable state is discharged into power supply.The polarity of diode D1-1, auxiliary electron switch G-1 will satisfy the requirement that discharges and recharges like this.
Operation principle:
(1) turn off process
When having overvoltage to produce on the high-frequency power electronic K switch 1, utilize the series circuit of forming with high-frequency power electronic K switch 1 corresponding diode D1-1, clamp capacitor C2-1 and capacitor C 1-1 that high-frequency power electronic K switch 1 is carried out clamper.The diode D1-1 corresponding with first high-frequency power electronic switch is open-minded, the capacitor C 1-1 corresponding with it, clamp capacitor C2-1 are recharged, the capacitor C 1-1 that is recharged, clamp capacitor C2-1 have limited the rising of high-frequency power electronic K switch 1 both end voltage, make high-frequency power electronic K switch 1 both end voltage all the time clamper realize dynamic voltage balancing at rated operational voltage.
Fill into the capacitor C 1-1 corresponding with first high-frequency power electronic switch, the energy of clamp capacitor C2-1 must discharge.Energy on the clamp capacitor C2-1 of first high-frequency power electronic switch ends discharges to corresponding high-frequency transformer coils Lm-1 by the auxiliary electron switch G-1 corresponding with it, make the voltage rising at the high-frequency transformer coils Lm-1 two ends corresponding with first high-frequency power electronic switch, owing to n high-frequency transformer coils Lm-1 equal turn numbers and on same high-frequency core, so the voltage at other n-1 high-frequency transformer coils Lm-1 two ends all raises, by n high-frequency transformer coils Lm-1 and n capacitor C 1-1 connect clamper the time energy back that absorbs in the capacitor C that is connected in parallel on both ends of power.Simultaneously n capacitor C 1-1 and n high-frequency transformer coils Lm-1 total voltage sum are greater than the voltage sum of n high-frequency power electronic switch ends, and this part energy that exceeds will be discharged in the capacitor C that is connected in parallel on both ends of power, the realization energy back.
When having overvoltage to produce on other n-1 the high-frequency power electronic switches, when high-frequency power electronic K switch 2...Kn goes up voltage and is higher than the capacitor C 1-1 corresponding with it and adds voltage on the clamp capacitor C2-1, each self-corresponding diode D1-1 conducting of high-frequency power electronic K switch 2...Kn, each self-corresponding capacitor C 1-1, clamp capacitor C2-1 begin to be recharged, energy release principle was identical when the release of the last energy of the capacitor C 1-1 that is recharged, clamp capacitor C2-1 was turn-offed with K1, no longer too much described herein.
(2) opening process
Can occur each high-frequency power electronic switch when opening equally and bear the uneven problem of voltage.The high-frequency power electronic switching voltage that clamp circuit can limit in the opening process equally is no more than rated value.
Claims (6)
1. realize all methods of pressure when many high-frequency power electronic devices are connected, it is characterized in that the high-frequency power electronic switch that n is connected in series (K1, K2 ... Kn) with after load R connects be attempted by power supply (Ud) two ends, the two ends shunt capacitance C of power supply, load R goes up anti-and diode D, the equalizer circuit that is composed in series by capacitor C 1 and high-frequency transformer coils Lm in parallel on each high-frequency power electronic switch, n high-frequency transformer coils Lm equal turn numbers and on same high-frequency core, steady-state pressure is realized in n 〉=2;
At each high-frequency transformer coils Lm two ends and connect the series circuit of forming by diode D1 and clamp capacitor C2, wherein, with diode D1 two ends an auxiliary electron switch G, auxiliary electron switch G and the conducting of high-frequency power electronic switch complementary in parallel of first high-frequency power electronic switch (K1) and the series circuit that connects.Between the tie point of the diode D1 of adjacent series circuit and clamp capacitor C2, insert diode D2, the negative electrode of next stage diode D2 is received the anode of upper level diode D2, the electric charge that charges into when dynamic during the high-frequency power electronic switch is opened among n-1 the clamp capacitor C2 except that first by diode D2 all is pooled among the clamp capacitor C2 that is attempted by first high-frequency power electronic switch (K1), utilize clamp capacitor C2, the series circuit clamper of diode D1 and capacitor C 1, dynamically the time, receive the overvoltage electric charge, realize dynamic voltage balancing, and the overvoltage electric charge that receives when dynamic by high-frequency transformer coils Lm is discharged into power supply when stable state.
2. when connecting, realizes a plurality of high-frequency power electronic devices according to claim 1 all methods of pressure, it is characterized in that the energy back circuit that is composed in series by n voltage doubling rectifing circuit in power supply (Ud) two ends parallel connection, each voltage doubling rectifing circuit comprises the capacitor C m of two diode in series Dm, two series connection and the high frequency transformer secondary coil Lm ' that is coupled with high-frequency transformer coils Lm, the end of high frequency transformer secondary coil Lm ' links to each other with the tie point of two diode in series Dm, and the other end links to each other with the tie point of the capacitor C m of two series connection.
3. realize the method for all pressing during a plurality of high-frequency power electronic devices series connection according to claim 1, n the high-frequency power electronic switch that it is characterized in that being connected in series (K1, K2 ... Kn) and the capacitor C 1, diode D1, clamp capacitor C2 and the diode D2 that are attempted by each high-frequency power electronic switch ends be encapsulated in the module.
4. when connecting, realizes a plurality of high-frequency power electronic devices according to claim 1 all methods of pressure, it is characterized in that each high-frequency power electronic switch ends is in parallel more respectively by diode D1 ', the series circuit of clamp capacitor C2 ' and capacitor C 1 ', with this series circuit and n high-frequency power electronic switch (K1, K2, Kn) be contained in the module, the negative pole of each high-frequency power electronic switch ends capacitor C 1 ' is linked to each other with the negative pole of the capacitor C 1 of corresponding switch ends separately respectively, the negative electrode of the diode D1 ' that first high-frequency power electronic switch (K1) is corresponding links to each other with the negative electrode of diode D1, insert diode D2 ' between the tie point of adjacent diode D1 ' and clamp capacitor C2 ', the negative electrode of next stage diode D2 ' is received the anode of upper level diode D2 '.
5. realize the method for all pressing during a plurality of high-frequency power electronic devices series connection according to claim 4, it is characterized in that series resistance r on the negative electrode of the corresponding diode D1 ' of first high-frequency power electronic switch (K1) and connecting line that the negative electrode of diode D1 links to each other.
6. realize all methods of pressure when many high-frequency power electronic devices are connected, it is characterized in that the high-frequency power electronic switch that n is connected in series (K1, K2 ... Kn) with after load R connects be attempted by power supply (Ud) two ends, the two ends shunt capacitance C of power supply, load R goes up anti-and diode D, the equalizer circuit that is composed in series by capacitor C 1-1 and high-frequency transformer coils Lm-1 in parallel on each high-frequency power electronic switch, n high-frequency transformer coils Lm-1 equal turn numbers and on same high-frequency core, steady-state pressure is realized in n 〉=2;
At each high-frequency transformer coils Lm-1 two ends and connect the series circuit of forming by diode D-1 and clamp capacitor C2-1, at the diode D1-1 two ends of each series circuit difference auxiliary electron switch G-1 in parallel, auxiliary electron switch G-1 and the conducting of high-frequency power electronic switch complementary, utilize the series circuit clamper of capacitor C 1-1, diode D1-1 and clamp capacitor C2-1, dynamically the time, receive the overvoltage electric charge, realize dynamic voltage balancing, and the overvoltage electric charge that receives when dynamic by high-frequency transformer coils Lm-1 is discharged into power supply when stable state.
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| CN110417285A (en) * | 2019-06-30 | 2019-11-05 | 武汉东城新能源有限公司 | A kind of novel high-frequency high voltage silicon rectifier stack circuit |
| CN114552619A (en) * | 2022-01-18 | 2022-05-27 | 华中科技大学 | Parallel voltage-sharing circuit of series diode device and parameter design method |
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| CN110138239A (en) * | 2019-05-20 | 2019-08-16 | 深圳市优优绿能电气有限公司 | A kind of wide scope invariable power converter circuit |
| CN110417285A (en) * | 2019-06-30 | 2019-11-05 | 武汉东城新能源有限公司 | A kind of novel high-frequency high voltage silicon rectifier stack circuit |
| CN114552619A (en) * | 2022-01-18 | 2022-05-27 | 华中科技大学 | Parallel voltage-sharing circuit of series diode device and parameter design method |
| CN114552619B (en) * | 2022-01-18 | 2024-05-24 | 华中科技大学 | Parallel voltage equalizing circuit of series diode device and parameter design method |
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| CN101860201B (en) | 2012-09-26 |
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