CN210053351U - Vienna circuit for frequency converter - Google Patents
Vienna circuit for frequency converter Download PDFInfo
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- CN210053351U CN210053351U CN201920737486.5U CN201920737486U CN210053351U CN 210053351 U CN210053351 U CN 210053351U CN 201920737486 U CN201920737486 U CN 201920737486U CN 210053351 U CN210053351 U CN 210053351U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a vienna circuit for converter, including input and output to and the preceding stage CL filter module and the rectifier module of setting between input and output, the input is coupled with the three-phase electric wire netting, the output includes P end that is used for being connected to the positive generating line of converter, N end that is used for being connected to the negative generating line of converter and the mid point of converter; the rectifier module comprises a first phase branch, a second phase branch and a third phase branch which are connected in parallel; the utility model discloses a vienna circuit is used for driving the motor of converter, compares with single-phase electricity, the utility model discloses a vienna circuit not only effectually reduces the voltage loss in the transmission, can also reduce input current's size, helps reducing the size of input power cord, and then reduces power equipment's cost.
Description
Technical Field
The utility model belongs to the technical field of the converter and specifically relates to a vienna circuit for converter is related to.
Background
Due to the advantages of three-phase electricity in power transmission, voltage loss and power loss, the application occasions of the three-phase electricity are more and more common under the condition that the power requirements of household air conditioners and heat pumps are more and more increased. However, the largest factor that limits the development of three-phase 380V voltages on household appliances is the harmonic current (THD) requirement. Because a large amount of harmonic waves generated by power electronic products are injected into a public power grid, the quality of a power supply grid is seriously influenced, the loss of the power grid is increased, and other equipment using the same network can work abnormally or even be damaged under the serious condition.
In the current market, passive PFC devices (direct current reactors and alternating current reactors) are mostly adopted for three-phase 380V frequency converter products, but the active FPCs applied to the frequency converter are few, and compared with the passive PFC products, the active PFC has the following advantages:
1. the active PFC has high power factor, low THD, low impact on the power quality of a power grid and high utilization rate of the power grid, and can utilize the useful power of a power generation end to the maximum extent;
2. the output fluctuation range of the active PFC is small, and voltage stabilization can be realized;
3. in a 380V system, the output voltage of the passive PFC is always smaller than the input voltage (voltage drops are generated on a direct current reactor and an alternating current reactor), and the active PFC can output a voltage value higher than the input voltage, so that the output voltage range is wider.
Disclosure of Invention
In order to solve the above problems, the utility model provides a vienna circuit for converter.
The main contents of the utility model include:
a Vienna circuit for a frequency converter comprises an input end and an output end, and a front-stage CL filtering module and a rectifying module which are arranged between the input end and the output end, wherein the input end is coupled with a three-phase power grid, and the output end comprises a P end used for being connected to a positive bus of the frequency converter, an N end used for being connected to a negative bus of the frequency converter and a midpoint of the frequency converter; wherein the rectifying module comprises a first phase branch, a second phase branch and a third phase branch which are connected in parallel, the first phase branch, the second phase branch and the third phase branch comprise an inductor Ls and a resistor Rs which are connected in series,
one end of the resistor Rs of the first phase branch is electrically connected to an anode of a first diode D1, a cathode of a fourth diode D4, and one end of a bidirectional switch Sa, respectively, the cathode of the first diode is electrically connected to the P end, the anode of the fourth diode D4 is electrically connected to the N end, and the other end of the bidirectional switch Sa is electrically connected to the O end;
one end of the resistor Rs of the second phase branch is electrically connected to an anode of the second diode D2, a cathode of the fifth diode D5, and one end of the bidirectional switch Sb, respectively, a cathode of the second diode D2 is electrically connected to the P terminal, an anode of the fifth diode D5 is electrically connected to the N terminal, and the other end of the bidirectional switch Sb is electrically connected to the O terminal;
one end of the resistor Rs of the third phase branch is electrically connected to the anode of the third diode D3, the cathode of the sixth diode D6, and one end of the bidirectional switch Sc, respectively, the cathode of the third diode D3 is electrically connected to the P terminal, the anode of the sixth diode D6 is electrically connected to the N terminal, and the other end of the bidirectional switch Sc is electrically connected to the O terminal;
the pre-stage CL filter module includes a first capacitor C1, a second capacitor C2, and a third capacitor C3, wherein one end of the first capacitor C1 is connected between the inductor Ls and the resistor Rs of the first phase branch, and the other end of the first capacitor C1 is connected between the inductor Ls and the resistor Rs of the second phase branch; one end of the second capacitor C2 is connected between the inductor L3 of the second phase branch and the resistor Rs, and the other end is connected between the inductor L3 of the third phase branch and the resistor Rs; one end of the third capacitor C3 is connected between the inductor L3 and the resistor Rs of the first phase branch, and the other end is connected between the inductor Ls and the resistor Rs of the third phase branch.
Preferably, the bidirectional switch Sa, the bidirectional switch Sb, and the bidirectional switch Sc each include a first MOS transistor and a second MOS transistor connected in series, the first MOS transistor is connected in parallel with a forward diode Dp, and the second MOS transistor is connected in parallel with a backward diode De.
Preferably, a negative electrode of the backward diode De in the bidirectional switch Sa is connected between the bidirectional switch Sa and the resistor Rs of the first phase branch, and a positive electrode of the backward diode De is connected between the first MOS transistor and the second MOS transistor; the positive pole of the positive diode Dp is connected between the first MOS tube and the second MOS tube, and the negative pole of the positive diode Dp is electrically connected with the end O.
Preferably, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode D6 are ultrafast recovery diodes.
Preferably, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode D6 are high voltage diodes of ATP30DQ1200B of Microsemi.
The beneficial effects of the utility model reside in that: the utility model provides a vienna circuit for converter for the motor of drive converter compares with single-phase electricity, the utility model discloses a vienna circuit is not only effectual the voltage loss who reduces in the transmission, can also reduce input current's size, helps reducing the size of input power cord, and then reduces power equipment's cost.
Drawings
Fig. 1 is a schematic view of the present invention.
Detailed Description
The technical solution protected by the present invention will be specifically described below with reference to the accompanying drawings.
Please refer to fig. 1. The utility model provides a vienna circuit for converter, including input and output to and the preceding stage CL filter module and the rectifier module of setting between input and output, the input is coupled with the three-phase electric wire netting, the output includes P end that is used for being connected to the positive generating line of converter, N end that is used for being connected to the negative generating line of converter and the mid point of converter; wherein the rectifying module comprises a first phase branch, a second phase branch and a third phase branch which are connected in parallel, the first phase branch, the second phase branch and the third phase branch comprise an inductor Ls and a resistor Rs which are connected in series,
one end of the resistor Rs of the first phase branch is electrically connected to an anode of a first diode D1, a cathode of a fourth diode D4, and one end of a bidirectional switch Sa, respectively, the cathode of the first diode is electrically connected to the P end, the anode of the fourth diode D4 is electrically connected to the N end, and the other end of the bidirectional switch Sa is electrically connected to the O end;
one end of the resistor Rs of the second phase branch is electrically connected to an anode of the second diode D2, a cathode of the fifth diode D5, and one end of the bidirectional switch Sb, respectively, a cathode of the second diode D2 is electrically connected to the P terminal, an anode of the fifth diode D5 is electrically connected to the N terminal, and the other end of the bidirectional switch Sb is electrically connected to the O terminal;
one end of the resistor Rs of the third phase branch is electrically connected to the anode of the third diode D3, the cathode of the sixth diode D6, and one end of the bidirectional switch Sc, respectively, the cathode of the third diode D3 is electrically connected to the P terminal, the anode of the sixth diode D6 is electrically connected to the N terminal, and the other end of the bidirectional switch Sc is electrically connected to the O terminal;
the pre-stage CL filter module includes a first capacitor C1, a second capacitor C2, and a third capacitor C3, wherein one end of the first capacitor C1 is connected between the inductor Ls and the resistor Rs of the first phase branch, and the other end of the first capacitor C1 is connected between the inductor Ls and the resistor Rs of the second phase branch; one end of the second capacitor C2 is connected between the inductor L3 of the second phase branch and the resistor Rs, and the other end is connected between the inductor L3 of the third phase branch and the resistor Rs; one end of the third capacitor C3 is connected between the inductor L3 and the resistor Rs of the first phase branch, and the other end is connected between the inductor Ls and the resistor Rs of the third phase branch.
Preferably, the bidirectional switch Sa, the bidirectional switch Sb, and the bidirectional switch Sc each include a first MOS transistor and a second MOS transistor connected in series, the first MOS transistor is connected in parallel with a forward diode Dp, and the second MOS transistor is connected in parallel with a backward diode De.
Preferably, a negative electrode of the backward diode De in the bidirectional switch Sa is connected between the bidirectional switch Sa and the resistor Rs of the first phase branch, and a positive electrode of the backward diode De is connected between the first MOS transistor and the second MOS transistor; the positive electrode of the forward diode Dp is connected between the first MOS tube and the second MOS tube, and the negative electrode of the forward diode Dp is electrically connected with the end O.
Preferably, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode D6 are ultrafast recovery diodes.
Preferably, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode D6 are high voltage diodes of ATP30DQ1200B of Microsemi.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. A Vienna circuit for a frequency converter, comprising an input and an output, the input being coupled to a three-phase power grid, and a preceding-stage CL filter module and a rectifier module being arranged between the input and the output, the output comprising a P-terminal for connection to a positive bus of the frequency converter, an N-terminal for connection to a negative bus of the frequency converter, and a midpoint of the frequency converter; wherein the rectifying module comprises a first phase branch, a second phase branch and a third phase branch which are connected in parallel, the first phase branch, the second phase branch and the third phase branch comprise an inductor Ls and a resistor Rs which are connected in series,
one end of the resistor Rs of the first phase branch is electrically connected to an anode of a first diode D1, a cathode of a fourth diode D4, and one end of a bidirectional switch Sa, respectively, the cathode of the first diode is electrically connected to the P end, the anode of the fourth diode D4 is electrically connected to the N end, and the other end of the bidirectional switch Sa is electrically connected to the O end;
one end of the resistor Rs of the second phase branch is electrically connected to an anode of the second diode D2, a cathode of the fifth diode D5, and one end of the bidirectional switch Sb, respectively, a cathode of the second diode D2 is electrically connected to the P terminal, an anode of the fifth diode D5 is electrically connected to the N terminal, and the other end of the bidirectional switch Sb is electrically connected to the O terminal;
one end of the resistor Rs of the third phase branch is electrically connected with the anode of a third diode D3, the cathode of a sixth diode D6 and one end of a bidirectional switch Sc respectively, the cathode of the third diode D3 is electrically connected with the end P, the anode of the sixth diode D6 is electrically connected with the end N, and the other end of the bidirectional switch Sc is electrically connected with the end O;
the pre-stage CL filter module includes a first capacitor C1, a second capacitor C2, and a third capacitor C3, wherein one end of the first capacitor C1 is connected between the inductor Ls and the resistor Rs of the first phase branch, and the other end of the first capacitor C1 is connected between the inductor Ls and the resistor Rs of the second phase branch; one end of the second capacitor C2 is connected between the inductor L3 of the second phase branch and the resistor Rs, and the other end is connected between the inductor L3 of the third phase branch and the resistor Rs; one end of the third capacitor C3 is connected between the inductor L3 and the resistor Rs of the first phase branch, and the other end is connected between the inductor Ls and the resistor Rs of the third phase branch.
2. A Vienna circuit for a frequency converter as recited in claim 1 wherein the bi-directional switch Sa, bi-directional switch Sb and bi-directional switch Sc each comprise a first MOS transistor and a second MOS transistor connected in series, the first MOS transistor being connected in parallel with a forward diode Dp and the second MOS transistor being connected in parallel with a reverse diode De.
3. The vienna circuit for a frequency converter according to claim 2, wherein a negative electrode of a reverse diode De in a bidirectional switch Sa is connected between the bidirectional switch Sa and a resistance Rs of the first phase branch, and a positive electrode of the reverse diode De is connected between the first MOS transistor and the second MOS transistor; the positive electrode of a forward diode Dp in the bidirectional switch Sa is connected between the first MOS transistor and the second MOS transistor, and the negative electrode of the forward diode Dp is electrically connected with the O terminal.
4. A wiener circuit for a frequency converter according to claim 1, wherein the first diode D1, second diode D2, third diode D3, fourth diode D4, fifth diode D5 and sixth diode D6 are ultrafast recovery diodes.
5. A Vienna circuit for a frequency converter as recited in claim 4 wherein the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode D6 are high voltage diodes of Microemi ATP30DQ 1200B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920737486.5U CN210053351U (en) | 2019-05-22 | 2019-05-22 | Vienna circuit for frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920737486.5U CN210053351U (en) | 2019-05-22 | 2019-05-22 | Vienna circuit for frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210053351U true CN210053351U (en) | 2020-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920737486.5U Active CN210053351U (en) | 2019-05-22 | 2019-05-22 | Vienna circuit for frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210053351U (en) |
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2019
- 2019-05-22 CN CN201920737486.5U patent/CN210053351U/en active Active
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