CN215120567U - Direct current chopping device - Google Patents
Direct current chopping device Download PDFInfo
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- CN215120567U CN215120567U CN202121494469.7U CN202121494469U CN215120567U CN 215120567 U CN215120567 U CN 215120567U CN 202121494469 U CN202121494469 U CN 202121494469U CN 215120567 U CN215120567 U CN 215120567U
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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 discloses a direct current chopper, which comprises a control circuit board, wherein a rectifying circuit and an IGBT circuit board are arranged on the control circuit board, and an IGBT is arranged on the IGBT circuit board; the rectifying circuit is electrically connected with an external three-phase electric inlet wire; one end of the rectifying circuit is electrically connected with a filter inductor L1, and the filter inductor L1 is electrically connected with an IGBT; the IGBT is electrically connected with a chopping inductor L2, and the chopping inductor L2 is electrically connected with an inverter; the other end of the rectifying circuit is electrically connected with the inverter, and the other end of the rectifying circuit is electrically connected with a filter capacitor C1 and a freewheeling diode D2; the other end of the filter capacitor C1 is electrically connected to a circuit between the filter inductor L1 and the IGBT; the other end of the freewheeling diode D2 is electrically connected to the circuit between the IGBT and the chopper inductor L2. The utility model discloses a design can reduce peripheral component's use to make the power regulation scheme become extremely simple, have the purpose that improves three-phase inlet wire department electric wire netting power factor simultaneously.
Description
Technical Field
The utility model relates to a control circuit technical field particularly, relates to a direct current chopper.
Background
At present, the application of silicon controlled rectifier phase modulation regulating power is very common, the characteristic of regulating power by using the method is that higher energy output efficiency can be obtained, the current power regulating method can be divided into 2 types, one type is a hardware phase-shifting power regulating technology, and the other type is to realize chopping power regulation by depending on the software control of a single chip microcomputer. However, the two methods cannot achieve the purpose of improving the power factor of the power grid at the three-phase incoming line.
In view of this, technical personnel of the company develop a 100kW/30kHz dc chopper device, which is installed between the rectification and inversion devices of the traditional parallel inversion silicon controlled inverter, to replace the traditional method of regulating the rectification output voltage and regulating power, so as to achieve the purpose of improving the power factor of the power grid at the three-phase incoming line.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's shortcoming, provide a direct current chopper, solved the defect that above-mentioned technique exists.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a direct current chopper, uses before the inverter of parallelly connected contravariant silicon controlled rectifier frequency conversion device, its characterized in that: the IGBT power supply comprises a control circuit board, wherein a rectifying circuit and an IGBT circuit board are arranged on the control circuit board, and an IGBT is arranged on the IGBT circuit board; the rectifying circuit is electrically connected with an external three-phase electric inlet wire; one end of the rectifying circuit is electrically connected with a filter inductor L1, and the filter inductor L1 is electrically connected with an IGBT; the IGBT is electrically connected with a chopping inductor L2, and the chopping inductor L2 is electrically connected with an inverter; the other end of the rectifying circuit is electrically connected with the inverter, and the other end of the rectifying circuit is electrically connected with a filter capacitor C1 and a freewheeling diode D2; the other end of the filter capacitor C1 is electrically connected to a circuit between the filter inductor L1 and the IGBT; the other end of the freewheeling diode D2 is electrically connected to the circuit between the IGBT and the chopper inductor L2.
In an optimized scheme, the rectifying circuit comprises a diode P4 and a diode P1 which are connected in series and then connected in parallel, a diode P5 and a diode P2, and a diode P6 and a diode P3; the three wires of the three-phase incoming line are electrically connected between diode P4 and diode P1, between diode P5 and diode P2, and between diode P6 and diode P3, respectively.
Owing to adopted above-mentioned technique, compare with prior art, the beneficial effects of the utility model are that:
the utility model discloses a circuit carries out the rectification to the electricity of three-phase inlet wire earlier, from exchanging to direct current, carries out the vary voltage after the rectification finishes after that, and the vary voltage is including stepping up or step down, carries inverter at last in, and such purpose is in order to improve three-phase inlet wire department electric wire netting power factor.
The utility model discloses a design can reduce peripheral component's use to make the power regulation scheme become extremely simple, have the purpose that improves three-phase inlet wire department electric wire netting power factor simultaneously.
Drawings
Fig. 1 is a schematic circuit diagram according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples
As shown in figure 1, a 100kW/30kHz direct current chopper device is applied in front of an inverter device of a parallel inversion silicon controlled inverter device. The incoming line voltage of the direct current chopper is 380V/50Hz, the rated electric power is 100Kw, the incoming line current is 150A, and the power factor of the power grid is 0.98. The input voltage of the chopper circuit is 510V, the output voltage of the chopper circuit is adjustable from 0V to 510V, the output current of the chopper circuit is adjustable from 0A to 200A, and the chopping frequency is 30 KHz.
The direct current chopping device comprises a control circuit board, wherein a rectifying circuit and an IGBT circuit board are arranged on the control circuit board, and an IGBT is arranged on the IGBT circuit board; the rectifying circuit is electrically connected with an external three-phase electric inlet wire; one end of the rectifying circuit is electrically connected with a filter inductor L1, and the filter inductor L1 is electrically connected with an IGBT; the IGBT is electrically connected with a chopping inductor L2, and the chopping inductor L2 is electrically connected with an inverter; the other end of the rectifying circuit is electrically connected with the inverter, and the other end of the rectifying circuit is electrically connected with a filter capacitor C1 and a freewheeling diode D2; the other end of the filter capacitor C1 is electrically connected to a circuit between the filter inductor L1 and the IGBT; the other end of the freewheeling diode D2 is electrically connected to the circuit between the IGBT and the chopper inductor L2.
The rectifying circuit comprises a diode P4, a diode P1, a diode P5, a diode P2, a diode P6 and a diode P3 which are connected in series and then connected in parallel; the three wires of the three-phase incoming line are electrically connected between diode P4 and diode P1, between diode P5 and diode P2, and between diode P6 and diode P3, respectively.
The utility model discloses a circuit carries out the rectification to the electricity of three-phase inlet wire earlier, from exchanging to direct current, carries out the vary voltage after the rectification finishes after that, and the vary voltage is including stepping up or step down, carries inverter at last in, and such purpose is in order to improve three-phase inlet wire department electric wire netting power factor.
The utility model discloses a design can reduce peripheral component's use to make the power regulation scheme become extremely simple, have the purpose that improves three-phase inlet wire department electric wire netting power factor simultaneously.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (2)
1. The utility model provides a direct current chopper, uses before the inverter of parallelly connected contravariant silicon controlled rectifier frequency conversion device, its characterized in that: the IGBT power supply comprises a control circuit board, wherein a rectifying circuit and an IGBT circuit board are arranged on the control circuit board, and an IGBT is arranged on the IGBT circuit board; the rectifying circuit is electrically connected with an external three-phase electric inlet wire; one end of the rectifying circuit is electrically connected with a filter inductor L1, and the filter inductor L1 is electrically connected with an IGBT; the IGBT is electrically connected with a chopping inductor L2, and the chopping inductor L2 is electrically connected with an inverter; the other end of the rectifying circuit is electrically connected with the inverter, and the other end of the rectifying circuit is electrically connected with a filter capacitor C1 and a freewheeling diode D2; the other end of the filter capacitor C1 is electrically connected to a circuit between the filter inductor L1 and the IGBT; the other end of the freewheeling diode D2 is electrically connected to the circuit between the IGBT and the chopper inductor L2.
2. A dc chopper as claimed in claim 1, wherein: the rectifying circuit comprises a diode P4, a diode P1, a diode P5, a diode P2, a diode P6 and a diode P3 which are connected in series and then connected in parallel; the three wires of the three-phase electric wire are respectively and electrically connected between a diode P4 and a diode P1, between a diode P5 and a diode P2, and between a diode P6 and a diode P3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121494469.7U CN215120567U (en) | 2021-07-02 | 2021-07-02 | Direct current chopping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121494469.7U CN215120567U (en) | 2021-07-02 | 2021-07-02 | Direct current chopping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215120567U true CN215120567U (en) | 2021-12-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121494469.7U Active CN215120567U (en) | 2021-07-02 | 2021-07-02 | Direct current chopping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215120567U (en) |
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2021
- 2021-07-02 CN CN202121494469.7U patent/CN215120567U/en active Active
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