CN208986844U - It is a kind of to press five-level voltage source type conversion device certainly - Google Patents
It is a kind of to press five-level voltage source type conversion device certainly Download PDFInfo
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- CN208986844U CN208986844U CN201821630673.5U CN201821630673U CN208986844U CN 208986844 U CN208986844 U CN 208986844U CN 201821630673 U CN201821630673 U CN 201821630673U CN 208986844 U CN208986844 U CN 208986844U
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Abstract
A bridge arm is formed from pressure five-level voltage source type conversion device, including by the identical power module of three structures and three identical capacitors the utility model discloses a kind of；The power module is divided into power module M1, power module M2 and power module M3, and there are five electric connecting points for each power module；The capacitor is divided into capacitor C1, capacitor C2 and capacitor C3；The utility model has the characteristics that structure is simple, multiple independent DC sources are not necessarily to compared to five LCU level conversion unit the utility model of H bridge cascade connection type, the direct series connection of switching tube is not present in circuit simultaneously, there is no more Redundanter schalter state, it controls more simple, practicability is stronger, it is easier to promote and use.
Description
Technical field
The utility model relates to a kind of from five-level voltage source type conversion device is pressed, and belong to converters technology
Field.
Background technique
In recent years, with the development in an all-round way of power electronic technique and control technology, power electronic equipment is made extensively
With requirement of the people to the high-power, high pressure resistant of power electronic equipment, low harmony wave disturbance is higher and higher.
Multilevel device has that power is big, switching frequency is low, output harmonic wave is small, rapid dynamic response speed, electromagnetism are simultaneous
The advantages that capacitive is good, and the power electronic devices reliability application that pressure voltage can be made low is in high-power field, and effectively
Reduce the higher hamonic wave that pulsewidth modulation abbreviation PWM control generates.
But since the number of diodes of well known five LCU level conversion unit of diode clamp bit-type is more, capacitor flies across type
The control of five LCU level conversion units is complicated, five LCU level conversion unit of H bridge cascade connection type needs multiple independent DC sources, active midpoint pincers
There are five LCU level conversion units such as tandem tap pipe voltage un-balance all there is inherent defect for bit-type five-level converter, it is suppressed that five electricity
The popularization and use of flat converting means in practice.
Summary of the invention
That the purpose of this utility model is to provide a kind of structures and control is simple, can without independent direct current sourc, switching device
From the five-power level voltage source converting means pressed, to solve the problems in above-mentioned background technique.
To achieve the above object, the utility model provides the following technical solutions: a kind of to become from pressure five-power level voltage source type
Changing device, it includes:
One bridge arm is formed by the identical power module of three structures and three capacitors；
The power module is divided into power module M1, power module M2 and power module M3, and each power module
There are five electric connecting points；
The capacitor is divided into capacitor C1, capacitor C2 and capacitor C3；
Wherein, the electric connecting point one, five of power module M1 is connect with capacitor C1, the electric connecting point of power module M2
One, it five is connect with capacitor C2, the electric connecting point five of power module M1 is connect with the electric connecting point one of power module M2, function
The electric connecting point one of rate module M3 is connect with the electric connecting point three of power module M1, the electric connecting point five of power module M3
It is connect with the electric connecting point three of power module M2, the electrical connection of the electric connecting point four and power module M2 of power module M1
Point two is connected respectively to the both ends of capacitor C3, output point of the electric connecting point three of power module M3 as converting means.
Each power module is by power device S1, S2, S3, S4, capacitor C, resistance R composition；Power device S1, S2,
S3, S4 are sequentially connected connect in the same direction, and then separate 5 electric connecting points one, two, three, four, five, resistance R and electric connecting point one,
Five are connected, and capacitor C is connected with electric connecting point two, four.
Described power device S1, S2, S3, S4 are insulated gate bipolar transistor, silicon carbide device, gate electrode capable of switching off crystalline substance lock
Any one of pipe, integrated gate commutated thyristor, power transistor, Power MOSFET.
The power module M1, power module M2 internal capacitance C and capacitor C3 are used for equal power inside modules derailing switch
Part both end voltage is not involved in the output of converter voltage.
The power module M1 internal resistance R has the function of discharging capacitor C1 electric energy, power module M2 internal resistance R tool
Play the role of discharging capacitor C2 electric energy, power module M3 internal resistance R has the function of discharging capacitor C3 electric energy.
Power module M3 internal resistance R has the function of voltage clamping, power module M3 internal electric tie point one, five
In the current potential clamper to the same potential point of two o'clock.
Fly that there is knot across five LCU level conversion unit of type compared to five LCU level conversion unit of conventional diode clamper type and capacitor
The simple feature of structure is not necessarily to multiple independent DC sources compared to five LCU level conversion unit the utility model of H bridge cascade connection type, simultaneously
The direct series connection of switching tube is not present in circuit, since first capacitor string branch is not as commutation branch, not more redundancy
Switch state, control is more simple, and practicability is stronger, it is easier to promote and use.
Detailed description of the invention
Fig. 1 is topology diagram of the utility model from pressure five-level voltage source type conversion device；
Fig. 2 is the topology diagram of the utility model converting means internal power module；
Fig. 3 is the topology diagram of the utility model embodiment one.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of from five-level voltage source type conversion device is pressed, it includes:
One bridge arm is formed by the identical power module of three structures and three capacitors；
The power module is divided into power module M1, power module M2 and power module M3, and each power module
There are five electric connecting points；
The capacitor is divided into capacitor C1, capacitor C2 and capacitor C3；
Wherein, the electric connecting point one, five of power module M1 is connect with capacitor C1, the electric connecting point of power module M2
One, it five is connect with capacitor C2, the electric connecting point five of power module M1 is connect with the electric connecting point one of power module M2, function
The electric connecting point one of rate module M3 is connect with the electric connecting point three of power module M1, the electric connecting point five of power module M3
It is connect with the electric connecting point three of power module M2, the electrical connection of the electric connecting point four and power module M2 of power module M1
Point two is connected respectively to the both ends of capacitor C3, output point of the electric connecting point three of power module M3 as converting means.
The tie point of power module of the Fig. 1 into Fig. 3 is indicated with Arabic numerals 1,2,3,4, is all made of in the literature
The numerical value one, two, three, four of capitalization Chinese state distinguishing；The 1.2.3 marked in Fig. 1 and Fig. 3 is to cross
Place, illustrates herein.
Capacitor C1 in Fig. 1, C2 can be that each bridge arm institute is exclusive can also be with common to multiple bridge arms, capacitor C3 be every
A bridge arm institute is exclusive.Three bridge arms of same structure can form a three phase rectifier topology, can be used for fairing, active filter
Wave, reactive compensation, three-phase imbalance compensation device.Three bridge arms of same structure can also form a three-phase inversion topological,
It can be used for photovoltaic DC-to-AC converter, vehicle-mounted inverter.It is topological back-to-back that six bridge arms of same structure can form three-phase.
Such as Fig. 2: each power module is by power device S1, S2, S3, S4, capacitor C, resistance R composition；Power device
S1, S2, S3, S4 are sequentially connected connect in the same direction, and then separate 5 electric connecting points one, two, three, four, five, resistance R and electrical connection
Point one, five is connected, and capacitor C is connected with electric connecting point two, four.
Described power device S1, S2, S3, S4 are insulated gate bipolar transistor, silicon carbide device, gate electrode capable of switching off crystalline substance lock
Any one of pipe, integrated gate commutated thyristor, power transistor, Power MOSFET.
Power module M1, M2 internal capacitance C and capacitor C3 is for equal power inside modules switching device both ends electricity
Pressure, is not involved in the output of converter voltage.
The power module M1 internal resistance R has the function of discharging capacitor C1 electric energy, power module M2 internal resistance R tool
Play the role of discharging capacitor C2 electric energy, power module M3 internal resistance R has the function of discharging capacitor C3 electric energy.
The effect of power module internal resistance R is the work that release internal capacitance C electric energy is played when equipment downtime or power-off
With.Power module M3 internal resistance R also has the function of voltage clamping, and power module M3 inner attachment points one, five current potentials are clamped
On position to the same potential point.
It also discloses simultaneously a kind of from pressure five-level voltage source type conversion device control method, comprising the following steps:
1) control method of power module M3 internal capacitance C both end voltage:
Voltage and the bridge arm current direction for detecting the both ends power module M3 internal capacitance C first, according to the capacitor C two of detection
The voltage value and the suitable switch state of bridge arm current direction selection at end, are charged or are discharged to capacitor C to reach, with
Realize the stability contorting to the voltage value at the both ends capacitor C；
2) control method of power module M1, M2 internal capacitance C both end voltage:
When power module M1, M2 internal switch device S1, S2 conducting, it is equivalent to inside power module M1 after simplifying circuit
Capacitor C connect with capacitor C3 after in parallel with capacitor C1 again, the capacity of widened Up Highway UHW capacitor, at this time in power module M1
The sum of the voltage at the both ends capacitor C and capacitor C3 in portion is equal to the voltage at the both ends capacitor C1, if the electricity inside power module M1
Appearance C is equal with the voltage at the both ends capacitor C3, then meets the capacitor C both end voltage value inside power module M1 and stablize in capacitor C1
The requirement of the half of the voltage at both ends；
Similarly, when power module M1, M2 internal switch device S3, S4 are connected, power module is equivalent to after simplifying circuit
Capacitor C inside M2 is in parallel with capacitor C2 again after connecting with capacitor C3, the capacity of widened Up Highway UHW capacitor, at this time power mould
The sum of voltage of capacitor C and the both ends capacitor C3 inside block M2 is equal to the voltage at the both ends capacitor C2, if in power module M2
The voltage at the both ends capacitor C and capacitor C3 in portion is equal, then meets the capacitor C both end voltage value inside power module M2 and stablize
The requirement of the half of the voltage at the both ends capacitor C2.
Wherein, the control method of three power module M1, M2, M3 internal capacitance C both end voltages is different, wherein power mould
The control method of block M1, M2 internal capacitance C both end voltage is identical.
Wherein, power module M1, M2 internal capacitance C and capacitor C3 have the effect for expanding bus capacitor string branch capacitance
Fruit.
Fig. 3 is the embodiments of the present invention one, and in example 1, power module M1's, M2 in Fig. 1 structure is electrical
In parallel one is distinguished between the electric connecting point four of tie point two, four and power module M1 and the electric connecting point two of power module M2
A pressure stabilizing branch being made of voltage-stabiliser tube and resistance；
Wherein, the electric connecting point two, four of power module M1 and pressure stabilizing branch Z1, R1 are in parallel, and power module M2's is electrical
Tie point two, four and pressure stabilizing branch Z3, R3 are in parallel, the electrical connection of the electric connecting point four and power module M2 of power module M1
Point two and pressure stabilizing branch Z2, R2 are in parallel.
The characteristics of embodiment, can be reached inside balance power module M1, M2 by the setting of voltage-stabiliser tube pressure stabilizing value
The purpose of capacitor C and capacitor C3 both end voltage, by assisting voltage regulator circuit that can fast implement power module M1, M2 internal capacitance
The equilibrium of C and capacitor C3 both end voltage so that power module M1, M2 internal switch device S1-S2, S3-S4 have it is good it is dynamic,
Steady-state pressure effect.
The voltage-stabiliser tube of each pressure stabilizing branch can be single voltage-stabiliser tube in the present embodiment, and it is real to be also possible to multiple voltage-stabiliser tube series connection
Realization or series and parallel mixing existing or in parallel are realized.
The resistance of each pressure stabilizing branch in the present embodiment can be single resistance, be also possible to the series connection of multiple resistance realize or
Parallel connection is realized or series and parallel mixing is realized.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of from pressure five-level voltage source type conversion device, which is characterized in that it includes:
One bridge arm is formed by the identical power module of three structures and three capacitors；
The power module is divided into power module M1, power module M2 and power module M3, and each power module has
Five electric connecting points；
The capacitor is divided into capacitor C1, capacitor C2 and capacitor C3；
Wherein, the electric connecting point one, five of power module M1 is connect with capacitor C1, the electric connecting point one of power module M2,
Five connect with capacitor C2, and the electric connecting point five of power module M1 is connect with the electric connecting point one of power module M2, power
The electric connecting point one of module M3 is connect with the electric connecting point three of power module M1, the electric connecting point five of power module M3 with
The electric connecting point three of power module M2 connects, the electric connecting point four of power module M1 and the electric connecting point of power module M2
Two are connected respectively to the both ends of capacitor C3, output point of the electric connecting point three of power module M3 as converting means.
2. according to claim 1 a kind of from pressure five-level voltage source type conversion device, it is characterised in that: each power
Module is by power device S1, S2, S3, S4, capacitor C, resistance R composition；Power device S1, S2, S3, S4 are sequentially connected in the same direction
It connects, and then separates 5 electric connecting points one, two, three, four, five, resistance R is connected with electric connecting point one, five, capacitor C and electrical
Tie point two, four is connected.
3. according to claim 2 a kind of from pressure five-level voltage source type conversion device, it is characterised in that: the power
Device S1, S2, S3, S4 be insulated gate bipolar transistor, silicon carbide device, gate level turn-off thyristor, integrated gate commutated
Any one of thyristor, power transistor, Power MOSFET.
4. according to claim 2 a kind of from pressure five-level voltage source type conversion device, it is characterised in that: the power
Module M1, M2 internal capacitance C and capacitor C3 is used for equal power inside modules switching device both end voltage, is not involved in converter electricity
The output of pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821630673.5U CN208986844U (en) | 2018-10-08 | 2018-10-08 | It is a kind of to press five-level voltage source type conversion device certainly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821630673.5U CN208986844U (en) | 2018-10-08 | 2018-10-08 | It is a kind of to press five-level voltage source type conversion device certainly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208986844U true CN208986844U (en) | 2019-06-14 |
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ID=66786675
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821630673.5U Expired - Fee Related CN208986844U (en) | 2018-10-08 | 2018-10-08 | It is a kind of to press five-level voltage source type conversion device certainly |
Country Status (1)
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| CN (1) | CN208986844U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964494A (en) * | 2018-10-08 | 2018-12-07 | 江苏师范大学 | It is a kind of to press five-level voltage source type conversion device and control method certainly |
-
2018
- 2018-10-08 CN CN201821630673.5U patent/CN208986844U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964494A (en) * | 2018-10-08 | 2018-12-07 | 江苏师范大学 | It is a kind of to press five-level voltage source type conversion device and control method certainly |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190614 Termination date: 20211008 |
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| CF01 | Termination of patent right due to non-payment of annual fee |