CN101860214B - Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices - Google Patents
Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices Download PDFInfo
- Publication number
- CN101860214B CN101860214B CN 201010163719 CN201010163719A CN101860214B CN 101860214 B CN101860214 B CN 101860214B CN 201010163719 CN201010163719 CN 201010163719 CN 201010163719 A CN201010163719 A CN 201010163719A CN 101860214 B CN101860214 B CN 101860214B
- Authority
- CN
- China
- Prior art keywords
- capacitor
- diode
- power electronic
- frequency power
- circuit
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The invention discloses a method for realizing passive voltage equalizing during the serial connection of multiple high-frequency power electronic devices. In the method, a clamping circuit formed by the serial connection of a diode and a capacitor is connected to two ends of each high-frequency power electronic switch in parallel, an energy feedback circuit formed by a corresponding diode, a capacitor, a high-frequency transformer and a voltage-doubling rectifying circuit is provided, the dynamic voltage clamping and the steady voltage equalizing are realized by utilizing the clamping circuit, the energy is fed back to a power supply by utilizing the energy feedback circuit, and meanwhile, a resistor is connected to each high-frequency power electronic switch in parallel so as to realize static voltage equalizing. The invention can realize steady voltage equalizing, dynamic voltage clamp 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
Realize the method for passive equalizing when the present invention relates to a plurality of high-frequency power electronic devices series connection, belong to electric and electronic technical field.
Background technology
Under high voltage operation, a device is inadequate, often needs several devices to be together in series and bears high voltage.Voltage-sharing when connecting in order to solve multitube, current practice can be summarized as four classes.
First kind way: two reverse conducting triode thyristor series connection.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 large and require all to press the 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 devices such as IGBT (insulation gate pole bipolar transistor) etc.This way 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 impacts when low frequency, but appreciable impact is arranged when high frequency.And the loss of resistance capaciting absorpting circuit is larger during high frequency.Moreover multitube when series connection often need to select the close pipe of turn-off characteristic and match series connection, this is not difficult to accomplish in manufactory, and just relatively more difficult need to change a pipe to user factory the time.
Equations of The Second Kind way: clamper power consumption way.Two high-frequency power electronic switch series connection.At every pipe two ends and connect the stable-pressure device of voltage-stabiliser tube etc.Voltage-stabiliser tube carries out clamper, the further rising of deboost when the terminal voltage of high-frequency power electronic switch 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 without voltage stabilizing circuit, go in the other clamp circuit and this energy is filled into, but the energy demand that is filled with clamp circuit feeds back to power supply, more complicated.The energy that some device will be filled with clamp circuit consumes with bypass resistance, but this loss is very large under high-frequency work.
The 3rd class way is controlled the drive system of each main switch to reach dynamic voltage balancing, and it is had relatively high expectations to control, mostly is 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 that realizes passive equalizing 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 to utilize clamp circuit to solve dynamic voltage balancing and steady-state pressure, utilize the energy back circuit with energy back in power supply.Parallel resistance on each high-frequency power electronic switch realizes static state voltage equipoise simultaneously.Following several technical solution is specifically arranged.
Scheme 1:
Realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, be attempted by both ends of power after it is characterized in that n high-frequency power electronic switch of connecting and load R connecting, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-1 and diode D1-1 in each high-frequency power electronic switch ends parallel connection, access diode D2-1 between the capacitor C 1-1 of adjacent clamp circuit and diode D1-1 tie point, and between the negative terminal of the tie point of n high-frequency power electronic switch capacitor C 1-1 in parallel and diode D1-1 and power supply access diode D5-1, the series circuit that is formed by capacitor C 2-1 and high frequency transformer primary coil Lm-1 in the parallel connection of the two ends of n high-frequency power electronic switch simultaneously, capacitor C 2-1, high frequency transformer primary coil Lm-1, load R and diode D5-1 have constituted jointly the former limit circuit of energy back circuit, the voltage doubling rectifing circuit in parallel at high frequency transformer secondary coil Lm '-1 two ends, this voltage doubling rectifing circuit is made of the diode D3-1 of series connection and capacitor C 3-1 and the capacitor C 4-1 of diode D4-1 and series connection, the diode D3-1 of series connection and diode D4-1 are in parallel with the capacitor C 3-1 that connects and capacitor C 4-1, the end of high frequency transformer secondary coil Lm '-1 links to each other with the tie point of capacitor C 4-1 with capacitor C 3-1, the other end of high frequency transformer secondary coil Lm '-1 links to each other with the tie point of diode D4-1 with diode D3-1, consist of the secondary circuit of energy back circuit, the electric charge that is filled with capacitor C 1-1 when utilizing the energy back circuit with clamper feeds back in the power supply by high frequency transformer secondary coil Lm '-1 and voltage doubling rectifing circuit and goes, realize dynamic electric voltage clamper and steady-state pressure, ratio=1 of high frequency transformer primary coil and the number of turn of secondary coil: n, at each high-frequency power electronic switch ends parallel resistance Rm-1, realize static state voltage equipoise.
Scheme 2:
Realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, be attempted by both ends of power after it is characterized in that n high-frequency power electronic switch of connecting and load R connecting, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-2 and diode D1-2 in each high-frequency power electronic switch ends parallel connection, access diode D2-2 between the capacitor C 1-2 of adjacent clamp circuit and diode D1-2 tie point, and between the negative terminal of the tie point of n high-frequency power electronic switch capacitor C 1-2 in parallel and diode D1-2 and power supply access diode D5-2, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-2 and high frequency transformer primary coil Lm-2 in the parallel connection of the two ends of n high-frequency power electronic switch simultaneously, at the series circuit that the two ends parallel connection of high-frequency power electronic switch of n series connection is comprised of high frequency transformer secondary coil Lm '-2 and capacitor C 5-2, the secondary circuit of formation energy back circuit; The electric charge that is filled with capacitor C 1-2 when utilizing the energy back circuit with clamper feeds back in the power supply by high frequency transformer secondary coil Lm '-2 and capacitor C 5-2 and goes, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic two ends parallel resistance Rm-2, realize static state voltage equipoise.
Scheme 3:
Realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, be attempted by both ends of power after it is characterized in that n high-frequency power electronic switch of connecting and load R connecting, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-3 and diode D1-3 in each high-frequency power electronic switch ends parallel connection, access diode D2-3 between the capacitor C 1-3 of adjacent clamp circuit and diode D1-3 tie point, and between the negative terminal of the tie point of n high-frequency power electronic switch capacitor C 1-3 in parallel and diode D1-3 and power supply access diode D5-3, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-3 and high frequency transformer primary coil Lm-3 in the parallel connection of the two ends of n high-frequency power electronic switch simultaneously, the series circuit that is formed by high frequency transformer secondary coil Lm '-3 and capacitor C 5-3 in the two ends parallel connection of high-frequency power electronic switch of remaining n-1 series connection, consist of the secondary circuit of energy back circuit, high frequency transformer secondary coil Lm '-3 and high frequency transformer primary coil Lm-3 are autotransformers, the charge feedback that is filled with capacitor C 1-3 when utilizing the former limit circuit of energy back circuit and secondary circuit with clamper is realized dynamic electric voltage clamper and steady-state pressure in power supply; At each high-frequency power electronic two ends parallel resistance Rm-3, realize static state voltage equipoise.
Realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, be attempted by both ends of power after it is characterized in that n high-frequency power electronic switch of connecting and load R connecting, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by negative pole and the capacitor C 1-4 of diode D1-4 in each high-frequency power electronic switch ends parallel connection, access diode D2-4 between the capacitor C 1-4 of adjacent clamp circuit and diode D1-4 tie point, and between the anode of the tie point of first high-frequency power electronic switch capacitor C 1-4 in parallel and diode D1-4 and power supply access diode D5-4, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-4 and high frequency transformer primary coil Lm-4 in the parallel connection of the two ends of first high-frequency power electronic switch simultaneously, in high frequency transformer secondary coil Lm '-4 two ends access voltage doubling rectifing circuit, this voltage doubling rectifing circuit is made of the diode D3-4 of series connection and capacitor C 3-4 and the capacitor C 4-4 of diode D4-4 and series connection, the diode D3-4 of series connection and diode D4-4 are in parallel with the capacitor C 3-4 that connects and capacitor C 4-4, the end of high frequency transformer secondary coil Lm '-4 links to each other with the tie point of capacitor C 4-4 with capacitor C 3-4, the other end of high frequency transformer secondary coil Lm '-4 links to each other with the tie point of diode D4-4 with diode D3-4, consist of the secondary circuit of energy back circuit, be filled with the charge feedback of capacitor C 1-4 in power supply when utilizing the former limit circuit of energy back circuit and secondary circuit with clamper, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic two ends parallel resistance Rm-4, realize static state voltage equipoise.
In above-mentioned 4 schemes, for reducing the impact of wiring inductance, n the high-frequency power electronic switch that is connected in series and the clamp circuit that is attempted by each high-frequency power electronic switch ends can be encapsulated in the module.
Scheme 5
Realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, it is characterized in that the high-frequency power electronic switch that n is connected in series is divided into two groups of series connection, be attempted by both ends of power behind the serial connection load R between the high-frequency power electronic switch of two groups of series connection, both ends of power shunt capacitance C, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 11 and diode D11 each high-frequency power electronic switch ends parallel connection of first group, access diode D21 between the capacitor C 11 of adjacent clamp circuit and diode D11 tie point, access diode D51 between the tie point of first high-frequency power electronic switch of the tie point of the capacitor C 11 of the clamp circuit of last high-frequency power electronic switch of first group and diode D11 and second group and load R, the former limit circuit of the first energy back circuit that is composed in series by capacitor C 21 and high frequency transformer primary coil Lm1 last high-frequency power electronic switch ends parallel connection of first group, the clamp circuit that is composed in series by the negative pole of capacitor C 12 and diode D12 each high-frequency power electronic switch ends parallel connection of second group, access diode D22 between the capacitor C 12 of adjacent clamp circuit and diode D12 tie point, access diode D52 between the tie point of last high-frequency power electronic switch of the tie point of the capacitor C 12 of the clamp circuit of first high-frequency power electronic switch of second group and diode D12 and first group and load R, the former limit circuit of the second energy back circuit that is composed in series by capacitor C 22 and high frequency transformer primary coil Lm2 first high-frequency power electronic switch ends parallel connection of second group, with the two ends access voltage doubling rectifing circuit of the high frequency transformer secondary coil Lm ' of high frequency transformer primary coil Lm1 and high frequency transformer primary coil Lm2 coupling, this voltage doubling rectifing circuit is made of the diode D3 of series connection and capacitor C 3 and the capacitor C 4 of diode D4 and series connection, diode D3 and the diode D4 and the capacitor C 3 of connecting and capacitor C 4 parallel connections of series connection, the end of high frequency transformer secondary coil Lm ' links to each other with the tie point of capacitor C 3 with capacitor C 4, the other end of high frequency transformer secondary coil Lm ' links to each other with the tie point of diode D4 with diode D3, consist of first, the secondary circuit of the second energy back circuit, utilize first, the former limit circuit of the second energy back circuit and secondary circuit are filled with the charge feedback of capacitor C 11 and capacitor C 12 in power supply during with clamper, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic switch ends parallel resistance Rm, realize static state voltage equipoise;
For reducing the impact of wiring inductance, each high-frequency power electronic switch that first group in the scheme 5 can be connected in series and the capacitor C 11 at its two ends and diode D11 are encapsulated in the module; Capacitor C 12 and the diode D12 at second group of each high-frequency power electronic switch that is connected in series and its two ends are encapsulated in the module.
Beneficial effect of the present invention is:
The present invention utilizes electric capacity 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, the passive equalizing when realizing a plurality of high-frequency power electronic devices series connection.Steady-state pressure when the present invention can realize a plurality of high-frequency power electronic devices series connection, dynamic voltage balancing, energy back.Be conducive to reduce cost and promote high voltage, development and the application of high-frequency power electronic technology in industry.
Description of drawings
A kind of instantiation circuit diagram of Fig. 1 scheme 1 method.
A kind of instantiation circuit diagram of Fig. 2 scheme 2 methods.
A kind of instantiation circuit diagram of Fig. 3 scheme 3 methods.
A kind of instantiation circuit diagram of Fig. 4 scheme 4 methods.
A kind of instantiation circuit diagram of Fig. 5 scheme 5 methods.
Embodiment
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. 1, realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, the high-frequency power electronic K switch 1 of n series connection, K2, Kn be attempted by power supply Ud two ends after load R connects, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-1 and diode D1-1 in each high-frequency power electronic switch ends parallel connection, access diode D2-1 between the capacitor C 1-1 of adjacent clamp circuit and diode D1-1 tie point, and between the negative terminal N of the tie point of n high-frequency power electronic K switch n capacitor C 1-1 in parallel and diode D1-1 and power supply access diode D5-1, the series circuit that is formed by capacitor C 2-1 and high frequency transformer primary coil Lm-1 in the two ends parallel connection of n high-frequency power electronic K switch n simultaneously, capacitor C 2-1, high frequency transformer primary coil Lm-1, load R and diode D5-1 have constituted jointly the former limit circuit of energy back circuit, the voltage doubling rectifing circuit in parallel at high frequency transformer secondary coil Lm '-1 two ends, this voltage doubling rectifing circuit is made of the diode D3-1 of series connection and capacitor C 3-1 and the capacitor C 4-1 of diode D4-1 and series connection, the diode D3-1 of series connection and diode D4-1 are in parallel with the capacitor C 3-1 that connects and capacitor C 4-1, the end of high frequency transformer secondary coil Lm '-1 links to each other with the tie point of capacitor C 4-1 with capacitor C 3-1, the other end of high frequency transformer secondary coil Lm '-1 links to each other with the tie point of diode D4-1 with diode D3-1, consist of the secondary circuit of energy back circuit, the electric charge that is filled with capacitor C 1-1 when utilizing the energy back circuit with clamper feeds back among the power supply Ud by high frequency transformer secondary coil Lm '-1 and voltage doubling rectifing circuit and goes, realize dynamic electric voltage clamper and steady-state pressure, ratio=1 of high frequency transformer primary coil and the number of turn of secondary coil: n, at each high-frequency power electronic switch ends parallel resistance Rm-1, realize static state voltage equipoise.
Operation principle:
During stable state, when first high-frequency power electronic K switch 1 both end voltage is higher than second high-frequency power electronic K switch 2 both end voltage, when high-frequency power electronic K switch 1 is opened, corresponding diode D2-1 conducting, the capacitor C 1-1 of high-frequency power electronic K switch 1 correspondence is by high-frequency power electronic K switch 1, the capacitor C 1-1 of high-frequency power electronic K switch 2 correspondences, corresponding diode D2-1 is to the capacitor C 1-1 charging of high-frequency power electronic K switch 2 correspondences, by that analogy, make the voltage of capacitor C 1-1 corresponding to each high-frequency power electronic switch all be no more than the voltage of capacitor C 1-1 corresponding to n high-frequency power electronic switch, and voltage=U/n of capacitor C 1-1 corresponding to n high-frequency power electronic switch, U is supply voltage, the steady state voltage sum of n high-frequency power electronic switch must equal U simultaneously, thereby realizes steady-state pressure.
(1) turn off process
On high-frequency power electronic K switch 1, there is overvoltage to produce, utilizes the series circuit of diode D1-1, the capacitor C 1-1 corresponding with high-frequency power electronic K switch 1 that high-frequency power electronic K switch 1 is carried out clamper.The diode D1-1 corresponding with high-frequency power electronic K switch 1 is open-minded, the capacitor C 1-1 corresponding with it is recharged, the capacitor C 1-1 that is recharged has limited the rising of high-frequency power electronic K switch 1 both end voltage, so that high-frequency power electronic K switch 1 both end voltage all the time clamper at rated operational voltage, realize the dynamic electric voltage clamper, other n-1 high-frequency power electronic switch dynamic overvoltage clamper principles are also similar.
The energy that is charged among capacitor C 1-1 corresponding to high-frequency power electronic switch must discharge, high-frequency power electronic K switch 1, K2 ... Kn-1 is pooled to the energy of rushing on each self-corresponding capacitor C 1-1 on capacitor C 1-1 corresponding to n high-frequency power electronic K switch n, the capacitor C 1-1 that high-frequency power electronic K switch n is corresponding feeds back to energy among the power supply Ud by high frequency transformer secondary coil Lm '-1 and voltage doubling rectifing circuit and goes, and realizes energy back.
(2) opening process
Can occur equally each high-frequency power electronic switch when opening 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.
Scheme 2:
With reference to Fig. 2, realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, the high-frequency power electronic K switch 1 of n series connection, K2, Kn be attempted by power supply Ud two ends after load R connects, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-2 and diode D1-2 in each high-frequency power electronic switch ends parallel connection, access diode D2-2 between the capacitor C 1-2 of adjacent clamp circuit and diode D1-2 tie point, and between the negative terminal N of the tie point of n high-frequency power electronic K switch n capacitor C 1-2 in parallel and diode D1-2 and power supply access diode D5-2, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-2 and high frequency transformer primary coil Lm-2 in the two ends parallel connection of n high-frequency power electronic K switch n simultaneously, high-frequency power electronic K switch 1 n series connection, K2, the series circuit that the two ends parallel connection of Kn is comprised of high frequency transformer secondary coil Lm '-2 and capacitor C 5-2, the secondary circuit of formation energy back circuit; The electric charge that is filled with capacitor C 1-2 when utilizing the energy back circuit with clamper feeds back among the power supply Ud by high frequency transformer secondary coil Lm '-2 and capacitor C 5-2 and goes, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic two ends parallel resistance Rm-2, realize static state voltage equipoise.
Operation principle:
Steady-state pressure when the high-frequency power electronic switch turns on and off, dynamic electric voltage clamper are identical with scheme 1 principle, no longer too much describe, but energy are to utilize the former and deputy limit circuit of energy back circuit to feed back among the power supply Ud to go, and realizes the passive feedback of energy herein.
With reference to Fig. 3, realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, the high-frequency power electronic K switch 1 of n series connection, K2, Kn be attempted by power supply Ud two ends after load R connects, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-3 and diode D1-3 in each high-frequency power electronic switch ends parallel connection, access diode D2-3 between the capacitor C 1-3 of adjacent clamp circuit and diode D1-3 tie point, and between the negative terminal N of the tie point of n high-frequency power electronic K switch n capacitor C 1-3 in parallel and diode D1-3 and power supply access diode D5-3, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-3 and high frequency transformer primary coil Lm-3 in the two ends parallel connection of n high-frequency power electronic K switch n simultaneously, the series circuit that is formed by high frequency transformer secondary coil Lm '-3 and capacitor C 5-3 in the two ends parallel connection of high-frequency power electronic switch of remaining n-1 series connection, consist of the secondary circuit of energy back circuit, high frequency transformer secondary coil Lm '-3 and high frequency transformer primary coil Lm-3 are autotransformers, the charge feedback that is filled with capacitor C 1-3 when utilizing the former limit circuit of energy back circuit and secondary circuit with clamper is realized dynamic electric voltage clamper and steady-state pressure in power supply Ud; At each high-frequency power electronic two ends parallel resistance Rm-3, realize static state voltage equipoise.
Operation principle:
Steady-state pressure when the high-frequency power electronic switch turns on and off, dynamic electric voltage clamper are identical with scheme 1 principle, no longer too much describe, but energy are to utilize the former and deputy limit circuit of energy back circuit to feed back among the power supply Ud to go, and realizes the passive feedback of energy herein.
With reference to Fig. 4, realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, the high-frequency power electronic K switch 1 of n series connection, K2, Kn be attempted by power supply Ud two ends after load R connects, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by negative pole and the capacitor C 1-4 of diode D1-4 in each high-frequency power electronic switch ends parallel connection, access diode D2-4 between the capacitor C 1-4 of adjacent clamp circuit and diode D1-4 tie point, and between the anode P of the tie point of first high-frequency power electronic K switch 1 capacitor C 1-4 in parallel and diode D1-4 and power supply access diode D5-4, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-4 and high frequency transformer primary coil Lm-4 in the parallel connection of the two ends of first high-frequency power electronic K switch 1 simultaneously, in high frequency transformer secondary coil Lm '-4 two ends access voltage doubling rectifing circuit, this voltage doubling rectifing circuit is made of the diode D3-4 of series connection and capacitor C 3-4 and the capacitor C 4-4 of diode D4-4 and series connection, the diode D3-4 of series connection and diode D4-4 are in parallel with the capacitor C 3-4 that connects and capacitor C 4-4, the end of high frequency transformer secondary coil Lm '-4 links to each other with the tie point of capacitor C 4-4 with capacitor C 3-4, the other end of high frequency transformer secondary coil Lm '-4 links to each other with the tie point of diode D4-4 with diode D3-4, consist of the secondary circuit of energy back circuit, be filled with the charge feedback of capacitor C 1-4 in power supply Ud when utilizing the former limit circuit of energy back circuit and secondary circuit with clamper, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic two ends parallel resistance Rm-4, realize static state voltage equipoise.
Operation principle:
During stable state, when second high-frequency power electronic K switch 2 both end voltage is higher than first high-frequency power electronic K switch 1 both end voltage, when high-frequency power electronic K switch 2 is opened, corresponding diode D2-4 conducting, the capacitor C 1-4 of the capacitor C 1-4 of high-frequency power electronic K switch 2 correspondences by high-frequency power electronic K switch 2, high-frequency power electronic K switch 1 correspondence, corresponding diode D2-4 are to the capacitor C 1-4 charging of high-frequency power electronic K switch 1 correspondence, by that analogy, realize steady-state pressure.
(1) turn off process
On high-frequency power electronic K switch 1, there is overvoltage to produce, utilizes the series circuit of diode D1-4, the capacitor C 1-4 corresponding with high-frequency power electronic K switch 1 that high-frequency power electronic K switch 1 is carried out clamper.The diode D1-4 corresponding with high-frequency power electronic K switch 1 is open-minded, the capacitor C 1-4 corresponding with it is recharged, the capacitor C 1-4 that is recharged has limited the rising of high-frequency power electronic K switch 1 both end voltage, so that high-frequency power electronic K switch 1 both end voltage all the time clamper at rated operational voltage, realize the dynamic electric voltage clamper, other n-1 high-frequency power electronic switch dynamic overvoltage clamper principles are also similar.
The energy that is charged among capacitor C 1-4 corresponding to high-frequency power electronic switch must discharge, high-frequency power electronic K switch 2, K3 ... Kn is pooled to the energy of rushing on each self-corresponding capacitor C 1-4 on the capacitor C 1-4 of first high-frequency power electronic K switch 1 correspondence, the capacitor C 1-4 of high-frequency power electronic K switch 1 correspondence feeds back to energy among the power supply Ud by high frequency transformer secondary coil Lm '-4 and voltage doubling rectifing circuit and goes, and realizes energy back.
(2) opening process
Can occur equally each high-frequency power electronic switch when opening 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.
In above-mentioned 4 schemes, for the impact that reduces wiring inductance can with n high-frequency power electronic K switch 1 being connected in series, K2 ... Kn is encapsulated in the module with the clamp circuit that is attempted by each high-frequency power electronic switch ends, and steady-state pressure, dynamic electric voltage clamper and energy back principle are constant.
Scheme 5
With reference to Fig. 5, realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection, with n high-frequency power electronic K switch 1 that is connected in series, K2, Kn is divided into two groups of K1 of series connection ... Kn-m, Kn-m+ 1 ... Kn, 1≤m＜n, be attempted by power supply Ud two ends behind the serial connection load R between the high-frequency power electronic switch of two groups of series connection, both ends of power shunt capacitance C, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 11 and diode D11 each high-frequency power electronic switch ends parallel connection of first group, access diode D21 between the capacitor C 11 of adjacent clamp circuit and diode D11 tie point, access diode D51 between the tie point of first high-frequency power electronic K switch n-m+1 of the tie point of the capacitor C 11 of the clamp circuit of last high-frequency power electronic K switch n-m of first group and diode D11 and second group and load R, the former limit circuit of the first energy back circuit that is composed in series by capacitor C 21 and high frequency transformer primary coil Lm1 last high-frequency power electronic K switch n-m two ends parallel connection of first group, the clamp circuit that is composed in series by the negative pole of capacitor C 12 and diode D12 each high-frequency power electronic switch ends parallel connection of second group, access diode D22 between the capacitor C 12 of adjacent clamp circuit and diode D12 tie point, access diode D52 between the tie point of last high-frequency power electronic K switch n-m of the tie point of the capacitor C 12 of the clamp circuit of first high-frequency power electronic K switch n-m+1 of second group and diode D12 and first group and load R, the former limit circuit of the second energy back circuit that is composed in series by capacitor C 22 and high frequency transformer primary coil Lm2 first high-frequency power electronic K switch n-m+1 two ends parallel connection of second group, with the two ends access voltage doubling rectifing circuit of the high frequency transformer secondary coil Lm ' of high frequency transformer primary coil Lm1 and high frequency transformer primary coil Lm2 coupling, this voltage doubling rectifing circuit is made of the diode D3 of series connection and capacitor C 3 and the capacitor C 4 of diode D4 and series connection, diode D3 and the diode D4 and the capacitor C 3 of connecting and capacitor C 4 parallel connections of series connection, the end of high frequency transformer secondary coil Lm ' links to each other with the tie point of capacitor C 3 with capacitor C 4, the other end of high frequency transformer secondary coil Lm ' links to each other with the tie point of diode D4 with diode D3, consist of first, the secondary circuit of the second energy back circuit, utilize first, the former limit circuit of the second energy back circuit and secondary circuit are filled with the charge feedback of capacitor C 11 and capacitor C 12 in power supply Ud during with clamper, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic switch ends parallel resistance Rm, realize static state voltage equipoise;
Operation principle:
During stable state, for high-frequency power electronic K switch 1, K2 ... Kn-m, when first high-frequency power electronic K switch 1 both end voltage is higher than second high-frequency power electronic K switch 2 both end voltage, after high-frequency power electronic K switch 1 is opened, corresponding diode D21 conducting, the capacitor C 11 of high-frequency power electronic K switch 1 correspondence is by high-frequency power electronic K switch 1, the capacitor C 12 of high-frequency power electronic K switch 2 correspondences, corresponding diode D22 is to capacitor C 12 chargings of high-frequency power electronic K switch 2 correspondences, by that analogy, realize high-frequency power electronic K switch 1, K2 ... the steady-state pressure of Kn-m.For high-frequency power electronic K switch n-m+ 1, Kn-m+ 2 ... Kn, when high-frequency power electronic K switch n-m+ 1 both end voltage is higher than high-frequency power electronic K switch n-m both end voltage, after high-frequency power electronic K switch n-m+ 1 opens, corresponding diode D22 conducting, the capacitor C 1 that high-frequency power electronic K switch n-m+ 1 is corresponding is passed through high-frequency power electronic K switch n-m+ 1, the capacitor C 11 that high-frequency power electronic K switch n-m is corresponding, corresponding diode D21 is to capacitor C 11 chargings corresponding to high-frequency power electronic K switch n-m, by that analogy, realize high-frequency power electronic K switch n-m+ 1, Kn-m+ 2 ... the steady-state pressure of Kn.
Dynamic electric voltage clamper principle is both combinations of scheme 1 and scheme 4, finally can realize dynamic electric voltage clamper and energy back equally, no longer too much describes herein.
For the impact that reduces wiring inductance can be encapsulated in capacitor C 11 and the diode D11 at first group of each high-frequency power electronic switch that is connected in series and its two ends in the module; Capacitor C 12 and the diode D12 at second group of each high-frequency power electronic switch that is connected in series and its two ends are encapsulated in the module.
Claims (10)
1. realize the method for passive equalizing when many high-frequency power electronic devices are connected, high-frequency power electronic switch (the K1 that it is characterized in that n series connection, K2, Kn) with after load R connects be attempted by power supply (Ud) two ends, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-1 and diode D1-1 in each high-frequency power electronic switch ends parallel connection, access diode D2-1 between the capacitor C 1-1 of adjacent clamp circuit and diode D1-1 tie point, and between the negative terminal (N) of the tie point of n high-frequency power electronic switch (Kn) capacitor C 1-1 in parallel and diode D1-1 and power supply access diode D5-1, the series circuit that is formed by capacitor C 2-1 and high frequency transformer primary coil Lm-1 in the two ends parallel connection of n high-frequency power electronic switch (Kn) simultaneously, capacitor C 2-1, high frequency transformer primary coil Lm-1, load R and diode D5-1 have constituted jointly the former limit circuit of energy back circuit, the voltage doubling rectifing circuit in parallel at high frequency transformer secondary coil Lm '-1 two ends, this voltage doubling rectifing circuit is made of the diode D3-1 of series connection and capacitor C 3-1 and the capacitor C 4-1 of diode D4-1 and series connection, the diode D3-1 of series connection and diode D4-1 are in parallel with the capacitor C 3-1 that connects and capacitor C 4-1, the end of high frequency transformer secondary coil Lm '-1 links to each other with the tie point of capacitor C 4-1 with capacitor C 3-1, the other end of high frequency transformer secondary coil Lm '-1 links to each other with the tie point of diode D4-1 with diode D3-1, consist of the secondary circuit of energy back circuit, the electric charge that is filled with capacitor C 1-1 when utilizing the energy back circuit with clamper feeds back in the power supply (Ud) by high frequency transformer secondary coil Lm '-1 and voltage doubling rectifing circuit and goes, realize dynamic electric voltage clamper and steady-state pressure, ratio=1 of high frequency transformer primary coil and the number of turn of secondary coil: n, at each high-frequency power electronic switch ends parallel resistance Rm-1, realize static state voltage equipoise.
2. realize the method for passive equalizing 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 clamp circuit that is connected in parallel on each high-frequency power electronic switch ends be encapsulated in the module.
3. realize the method for passive equalizing when many high-frequency power electronic devices are connected, high-frequency power electronic switch (the K1 that it is characterized in that n series connection, K2, Kn) with after load R connects be attempted by power supply (Ud) two ends, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-2 and diode D1-2 in each high-frequency power electronic switch ends parallel connection, access diode D2-2 between the capacitor C 1-2 of adjacent clamp circuit and diode D1-2 tie point, and between the negative terminal (N) of the tie point of n high-frequency power electronic switch (Kn) capacitor C 1-2 in parallel and diode D1-2 and power supply access diode D5-2, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-2 and high frequency transformer primary coil Lm-2 in the two ends parallel connection of n high-frequency power electronic switch (Kn) simultaneously, high-frequency power electronic switch (K1 n series connection, K2, Kn) series circuit that two ends parallel connection is comprised of high frequency transformer secondary coil Lm '-2 and capacitor C 5-2, the secondary circuit of formation energy back circuit; The electric charge that is filled with capacitor C 1-2 when utilizing the energy back circuit with clamper feeds back in the power supply (Ud) by high frequency transformer secondary coil Lm '-2 and capacitor C 5-2 and goes, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic two ends parallel resistance Rm-2, realize static state voltage equipoise.
4. realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection according to claim 3, n the high-frequency power electronic switch that it is characterized in that being connected in series (K1, K2 ... Kn) and the clamp circuit that is connected in parallel on each high-frequency power electronic switch ends be encapsulated in the module;
5. realize the method for passive equalizing when many high-frequency power electronic devices are connected, high-frequency power electronic switch (the K1 that it is characterized in that n series connection, K2, Kn) with after load R connects be attempted by power supply (Ud) two ends, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 1-3 and diode D1-3 in each high-frequency power electronic switch ends parallel connection, access diode D2-3 between the capacitor C 1-3 of adjacent clamp circuit and diode D1-3 tie point, and between the negative terminal (N) of the tie point of n high-frequency power electronic switch (Kn) capacitor C 1-3 in parallel and diode D1-3 and power supply access diode D5-3, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-3 and high frequency transformer primary coil Lm-3 in the two ends parallel connection of n high-frequency power electronic switch (Kn) simultaneously, the series circuit that is formed by high frequency transformer secondary coil Lm '-3 and capacitor C 5-3 in the two ends parallel connection of high-frequency power electronic switch of remaining n-1 series connection, consist of the secondary circuit of energy back circuit, high frequency transformer secondary coil Lm '-3 and high frequency transformer primary coil Lm-3 are autotransformers, the charge feedback that is filled with capacitor C 1-3 when utilizing the former limit circuit of energy back circuit and secondary circuit with clamper is realized dynamic electric voltage clamper and steady-state pressure in power supply (Ud); At each high-frequency power electronic two ends parallel resistance Rm-3, realize static state voltage equipoise.
6. realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection according to claim 5, n the high-frequency power electronic switch that it is characterized in that being connected in series (K1, K2 ... Kn) and the clamp circuit that is connected in parallel on each high-frequency power electronic switch ends be encapsulated in the module.
7. realize the method for passive equalizing when many high-frequency power electronic devices are connected, high-frequency power electronic switch (the K1 that it is characterized in that n series connection, K2, Kn) with after load R connects be attempted by power supply (Ud) two ends, the two ends shunt capacitance C of power supply, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by negative pole and the capacitor C 1-4 of diode D1-4 in each high-frequency power electronic switch ends parallel connection, access diode D2-4 between the capacitor C 1-4 of adjacent clamp circuit and diode D1-4 tie point, and between the anode (P) of the tie point of first high-frequency power electronic switch (K1) capacitor C 1-4 in parallel and diode D1-4 and power supply access diode D5-4, the former limit circuit of the energy back circuit that is composed in series by capacitor C 2-4 and high frequency transformer primary coil Lm-4 in the two ends parallel connection of first high-frequency power electronic switch (K1) simultaneously, in high frequency transformer secondary coil Lm '-4 two ends access voltage doubling rectifing circuit, this voltage doubling rectifing circuit is made of the diode D3-4 of series connection and capacitor C 3-4 and the capacitor C 4-4 of diode D4-4 and series connection, the diode D3-4 of series connection and diode D4-4 are in parallel with the capacitor C 3-4 that connects and capacitor C 4-4, the end of high frequency transformer secondary coil Lm '-4 links to each other with the tie point of capacitor C 4-4 with capacitor C 3-4, the other end of high frequency transformer secondary coil Lm '-4 links to each other with the tie point of diode D4-4 with diode D3-4, consist of the secondary circuit of energy back circuit, be filled with the charge feedback of capacitor C 1-4 in power supply (Ud) when utilizing the former limit circuit of energy back circuit and secondary circuit with clamper, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic two ends parallel resistance Rm-4, realize static state voltage equipoise.
8. realize the method for passive equalizing during a plurality of high-frequency power electronic devices series connection according to claim 7, n the high-frequency power electronic switch that it is characterized in that being connected in series (K1, K2 ... Kn) and the clamp circuit that is attempted by each high-frequency power electronic switch ends be encapsulated in the module.
9. realize the method for passive equalizing when many high-frequency power electronic devices are connected, it is characterized in that the individual high-frequency power electronic switch (K1 that is connected in series with n, K2, Kn) be divided into two groups of (K1 of series connection ... Kn-m, Kn-m+1 ... Kn, 1≤m＜n), be attempted by power supply (Ud) two ends behind the serial connection load R between the high-frequency power electronic switch of two groups of series connection, both ends of power shunt capacitance C, the upper anti-and diode D of load R, n 〉=2, the clamp circuit that is composed in series by the positive pole of capacitor C 11 and diode D11 each high-frequency power electronic switch ends parallel connection of first group, access diode D21 between the capacitor C 11 of adjacent clamp circuit and diode D11 tie point, access diode D51 between the tie point of first high-frequency power electronic switch (Kn-m+1) of the tie point of the capacitor C 11 of the clamp circuit of last high-frequency power electronic switch (Kn-m) of first group and diode D11 and second group and load R, the former limit circuit of the first energy back circuit that is composed in series by capacitor C 21 and high frequency transformer primary coil Lm1 last high-frequency power electronic switch (Kn-m) two ends parallel connection of first group, the clamp circuit that is composed in series by the negative pole of capacitor C 12 and diode D12 each high-frequency power electronic switch ends parallel connection of second group, access diode D22 between the capacitor C 12 of adjacent clamp circuit and diode D12 tie point, access diode D52 between the tie point of last high-frequency power electronic switch (Kn-m) of the tie point of the capacitor C 12 of the clamp circuit of first high-frequency power electronic switch (Kn-m+1) of second group and diode D12 and first group and load R, the former limit circuit of the second energy back circuit that is composed in series by capacitor C 22 and high frequency transformer primary coil Lm2 first high-frequency power electronic switch (Kn-m+1) two ends parallel connection of second group, with the two ends access voltage doubling rectifing circuit of the high frequency transformer secondary coil Lm ' of high frequency transformer primary coil Lm1 and high frequency transformer primary coil Lm2 coupling, this voltage doubling rectifing circuit is made of the diode D3 of series connection and capacitor C 3 and the capacitor C 4 of diode D4 and series connection, diode D3 and the diode D4 and the capacitor C 3 of connecting and capacitor C 4 parallel connections of series connection, the end of high frequency transformer secondary coil Lm ' links to each other with the tie point of capacitor C 3 with capacitor C 4, the other end of high frequency transformer secondary coil Lm ' links to each other with the tie point of diode D4 with diode D3, consist of first, the secondary circuit of the second energy back circuit, utilize first, the former limit circuit of the second energy back circuit and secondary circuit are filled with the charge feedback of capacitor C 11 and capacitor C 12 in power supply (Ud) during with clamper, realize dynamic electric voltage clamper and steady-state pressure, at each high-frequency power electronic switch ends parallel resistance Rm, realize static state voltage equipoise;
10. realize the method for passive equalizing when a plurality of high-frequency power electronic devices according to claim 9 is connected, it is characterized in that capacitor C 11 and the diode D11 at first group of each high-frequency power electronic switch that is connected in series and its two ends are encapsulated in the module; Capacitor C 12 and the diode D12 at second group of each high-frequency power electronic switch that is connected in series and its two ends are encapsulated in the module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010163719 CN101860214B (en) | 2010-05-05 | 2010-05-05 | Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010163719 CN101860214B (en) | 2010-05-05 | 2010-05-05 | Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101860214A CN101860214A (en) | 2010-10-13 |
| CN101860214B true CN101860214B (en) | 2013-01-16 |
Family
ID=42945916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010163719 Expired - Fee Related CN101860214B (en) | 2010-05-05 | 2010-05-05 | Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101860214B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490603B (en) * | 2013-09-16 | 2015-12-16 | 王达开 | A kind of power switching device series voltage-limiting circuit |
| CN107612323B (en) * | 2017-08-15 | 2019-11-08 | 西安电子科技大学 | Voltage balancing circuit |
| CN112234811B (en) * | 2020-09-10 | 2022-07-12 | 西安交通大学 | Half-bridge type power electronic device series voltage-sharing circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405958A (en) * | 2001-08-09 | 2003-03-26 | 吴加林 | Series power-switch arm capable of automatically equalizing voltage |
| CN200969570Y (en) * | 2006-10-21 | 2007-10-31 | 中国电子科技集团公司第三十八研究所 | Solid state pulse modulation switch |
| CN201075817Y (en) * | 2007-08-31 | 2008-06-18 | 保定三伊电力电子有限公司 | Series connection high voltage bridge arm having voltage equalizing protection |
| CN201118461Y (en) * | 2007-10-10 | 2008-09-17 | 山东新风光电子科技发展有限公司 | A dynamic voltage balance circuit for five-level commutator |
| CN100530881C (en) * | 2007-01-10 | 2009-08-19 | 合肥工业大学 | Cascade active voltage-stabilizing controller of power switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2513599A1 (en) * | 2005-08-09 | 2007-02-09 | David A. Kelly | High voltage to low voltage bidirectional converter |
-
2010
- 2010-05-05 CN CN 201010163719 patent/CN101860214B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405958A (en) * | 2001-08-09 | 2003-03-26 | 吴加林 | Series power-switch arm capable of automatically equalizing voltage |
| CN200969570Y (en) * | 2006-10-21 | 2007-10-31 | 中国电子科技集团公司第三十八研究所 | Solid state pulse modulation switch |
| CN100530881C (en) * | 2007-01-10 | 2009-08-19 | 合肥工业大学 | Cascade active voltage-stabilizing controller of power switch |
| CN201075817Y (en) * | 2007-08-31 | 2008-06-18 | 保定三伊电力电子有限公司 | Series connection high voltage bridge arm having voltage equalizing protection |
| CN201118461Y (en) * | 2007-10-10 | 2008-09-17 | 山东新风光电子科技发展有限公司 | A dynamic voltage balance circuit for five-level commutator |
Non-Patent Citations (1)
| Title |
|---|
| 查申森 等.混合式断路器的IGBT串联均压技术.《电网技术》.2010,第34卷(第4期),177-182. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101860214A (en) | 2010-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106559004B (en) | Multi-electrical level inverter | |
| CN103296882B (en) | A kind of DC-DC controlled resonant converter with automatically equalizing voltage function | |
| CN106655853B (en) | A kind of three-level inverter | |
| CN102969893B (en) | A kind of high gain boost type DC converter | |
| CN102545582A (en) | Bridgeless power factor correction circuit and control method thereof | |
| CN101980437A (en) | Five-level grid-connected inverter | |
| CN103095134A (en) | Active network boost converter | |
| CN202135054U (en) | DC multi power supply conversion apparatus | |
| CN108471235A (en) | The two-way DC/DC circuits of three level | |
| CN102427352B (en) | High-voltage power electronic combined switch | |
| CN102882410B (en) | A kind of single-phase seven electrical level inverters | |
| CN103973094A (en) | Rapid precharging circuit for modular multi-level converter | |
| CN106169885B (en) | A kind of switch of tandem type six multi-electrical level inverter | |
| CN202231632U (en) | Single-phase non-isolated form low common mode current photovoltaic grid connected inverter | |
| CN103887981A (en) | Full-bridge DC-DC converter | |
| CN105356784A (en) | Grid connected inverter with DC bus voltage balance function | |
| CN103066834A (en) | Staggered parallel high-gain boost type direct current (DC) converter | |
| CN102891621A (en) | Single-phase asymmetric multilevel inverter | |
| CN103118460A (en) | Novel multi-path LED passive current-equalizing circuit and LED driving power source | |
| CN101860214B (en) | Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices | |
| CN103312211A (en) | Control method of single phase grid-connected inverter | |
| CN102368616B (en) | Power factor compensation control circuit of self-turn-off device | |
| CN102611318A (en) | Continuous adjustable power supply with variable structure and constant power | |
| CN104242666A (en) | Novel inverter welding power supply | |
| CN204906215U (en) | MMC module circuit with ability is blocked to direct current side trouble |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20130505 |