CN219087012U - Frequency converter - Google Patents
Frequency converter Download PDFInfo
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- CN219087012U CN219087012U CN202223597692.1U CN202223597692U CN219087012U CN 219087012 U CN219087012 U CN 219087012U CN 202223597692 U CN202223597692 U CN 202223597692U CN 219087012 U CN219087012 U CN 219087012U
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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 relates to the technical field of frequency converters, in particular to a frequency converter, and aims to solve the problem that voltage fluctuation at two ends of a capacitor circuit of the existing frequency converter is large. For this purpose, the frequency converter of the present utility model comprises: the control circuit is used for acquiring the voltages at two ends of the capacitor circuit and controlling the operation of the boost circuit according to the voltages, so that the regulation and control of the fluctuating voltages at two ends of the capacitor circuit are realized, and the continuous and reliable operation of a load is ensured.
Description
Technical Field
The utility model relates to the technical field of frequency converters, and particularly provides a frequency converter.
Background
A Variable-Frequency Drive (VFD) is a power control device that applies a Variable-Frequency Drive technique to control an ac motor by changing the Frequency of the operating power supply of the motor. As an example, the inverter may be applied to an external air conditioner. Referring to fig. 1, the frequency converter may generally include a rectifying circuit 11, a capacitor circuit 12, and an inverter circuit 13, and the capacitor circuit 12 may include at least one capacitor, and in the related art, the capacitor may be an electrolytic capacitor or a thin film capacitor. When the capacitor adopts a thin film capacitor, the capacity of the thin film capacitor relative to the electrolytic capacitor is small and is about 10 percent of the capacity of the electrolytic capacitor, and when the capacitor is fully loaded and output, the voltage fluctuation at the two ends of the thin film capacitor is large, so that the control is not facilitated.
Disclosure of Invention
The utility model aims to solve the technical problem that the voltage fluctuation at two ends of the existing frequency converter capacitor circuit is large.
In a first aspect, the present utility model provides a frequency converter comprising:
the rectification circuit is used for converting the received alternating voltage into direct voltage;
the bypass diode is arranged between the rectifying circuit and the capacitor circuit, the anode of the bypass diode is connected with the rectifying circuit, and the cathode of the bypass diode is connected with the first end of the capacitor circuit;
the boost circuit is arranged in parallel with the bypass diode;
the capacitor circuit comprises at least one capacitor;
an inverter circuit for converting the DC voltage into an AC voltage and supplying the AC voltage to a load;
and the control circuit is used for acquiring the voltages at two ends of the capacitor circuit and controlling the booster circuit to work according to the voltages.
In some embodiments, the boost circuit comprises an inductor, a first diode and a first insulated gate bipolar transistor, wherein a first end of the inductor is connected with the positive electrode of the bypass diode, a second end of the inductor is connected with the positive electrode of the first diode, a negative electrode of the first diode is connected with the negative electrode of the bypass diode, a collector of the first insulated gate bipolar transistor is connected between the inductor and the first diode, an emitter of the first insulated gate bipolar transistor is connected with the negative electrode of the rectifying circuit output end, and a gate of the first insulated gate bipolar transistor is connected with the control circuit;
the control circuit inputs pulse signals through the gate electrode of the first insulated gate bipolar transistor and is used for controlling the on and off of the first insulated gate bipolar transistor.
In some embodiments, the frequency converter further includes a voltage preprocessing circuit disposed between the capacitor circuit and the inverter circuit for reducing a voltage across the capacitor circuit to a voltage range acceptable by the control circuit.
In some embodiments, the voltage preprocessing circuit includes at least two voltage dividing resistors arranged in series.
In some embodiments, the voltage preprocessing circuit includes a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor, and a fourth voltage dividing resistor arranged in series; and a voltage acquisition interface of the control circuit is connected with a connection point between the third voltage dividing resistor and the fourth voltage dividing resistor.
In some embodiments, the frequency converter further includes a fifth voltage dividing resistor, a first end of the fifth voltage dividing resistor is connected with an emitter of the first insulated gate bipolar transistor, and a second end of the fifth voltage dividing resistor is connected with a negative electrode of the rectifying circuit output end;
the current acquisition interface of the control circuit is connected with a connection point between the fifth voltage dividing resistor and the emitter of the first insulated gate bipolar transistor and is used for acquiring the current of the booster circuit and controlling the duty ratio of outputting pulse signals to the booster circuit according to the current.
In some embodiments, the capacitance is a thin film capacitance.
In some embodiments, the rectifying circuit includes a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, and a seventh diode, wherein the second diode, the third diode, and the fourth diode are connected at their cathodes, the fifth diode, the sixth diode, and the seventh diode are connected at their anodes, the fifth diode is connected at its cathode with the anode of the second diode, the sixth diode is connected at its anode with the anode of the third diode, and the seventh diode is connected at its cathode with the anode of the fourth diode.
In some embodiments, the control circuit further comprises an inverter circuit control interface to control the inverter circuit to generate an alternating voltage.
In some embodiments, the inverter circuit includes a second insulated gate bipolar transistor, a third insulated gate bipolar transistor, a fourth insulated gate bipolar transistor, a fifth insulated gate bipolar transistor, a sixth insulated gate bipolar transistor, and a seventh insulated gate bipolar transistor, with the collectors of the second insulated gate bipolar transistor, the third insulated gate bipolar transistor, and the fourth insulated gate bipolar transistor being connected, with the emitters of the fifth insulated gate bipolar transistor, the sixth insulated gate bipolar transistor, and the seventh insulated gate bipolar transistor being connected, with the collectors of the second insulated gate bipolar transistor, the emitters of the third insulated gate bipolar transistor, and the collector of the sixth insulated gate bipolar transistor being connected, with the emitters of the fourth insulated gate bipolar transistor being connected, with the collectors of the seventh insulated gate bipolar transistor being connected.
Under the condition that the technical scheme is adopted, the frequency converter comprises a rectifying circuit, a bypass diode, a boost circuit, a capacitor circuit, an inverter circuit and a control circuit, wherein the bypass diode is arranged between the rectifying circuit and the capacitor circuit, the boost circuit connected with the bypass diode in parallel is arranged, and the control circuit is arranged and used for acquiring voltages at two ends of the capacitor circuit and controlling the boost circuit to work according to the voltages, so that regulation and control of fluctuating voltages at two ends of the capacitor circuit are realized, and continuous and reliable operation of a load is ensured.
Drawings
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a related art frequency converter;
fig. 2 is a schematic structural diagram of a frequency converter according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a frequency converter according to another embodiment of the present application.
Detailed Description
Some embodiments of the utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application.
As will be appreciated from the description of the background section, as shown in fig. 1, the frequency converter may generally include a rectifying circuit 11, a capacitor circuit 12, and an inverter circuit 13, where the rectifying circuit 11 is configured to receive an ac voltage of an ac power source 14 and convert the ac voltage into a dc voltage. The capacitor circuit 12 may include a capacitor for filtering and stabilizing the dc voltage. The inverter circuit 13 is used for converting the direct current voltage into alternating current voltage with preset frequency which meets the load requirement. In the related art, the capacitor may employ an electrolytic capacitor or a thin film capacitor. When the capacitor adopts a thin film capacitor, the capacity of the thin film capacitor relative to the electrolytic capacitor is small and is about 10 percent of the capacity of the electrolytic capacitor, and when the capacitor is fully loaded and output, the voltage fluctuation at the two ends of the thin film capacitor is large, so that the control is not facilitated.
In view of this, the present application provides a frequency converter, referring to fig. 2, fig. 2 is a schematic structural diagram of the frequency converter provided in the present application, which may include:
a rectifying circuit 21 for converting the received ac voltage into a dc voltage;
bypass diode D 0 Bypass diode D 0 A bypass diode D arranged between the rectifying circuit 21 and the capacitor circuit 23 0 Is connected with the rectifying circuit 21, bypasses the diode D 0 Is connected to a first terminal of the capacitive circuit 23;
a capacitance circuit 23 including at least one capacitance;
an inverter circuit 24 for converting a direct-current voltage into an alternating-current voltage and supplying the alternating-current voltage to a load;
and a control circuit 25 for acquiring the voltages at both ends of the capacitor circuit 23 and controlling the operation of the booster circuit 22 according to the voltages.
In some embodiments, the boost circuit 22 may include an inductance L, a first diode D 1 And a first insulated gate bipolar transistor IGBT1 (Insulated Gate Bipolar Transistor), a first end of the inductor L and a bypass diode D 0 The second end of the inductor L is connected with the first diode D 1 Is connected with the positive electrode of the first diode D 1 Cathode of (D) and bypass diode D 0 The collector of the first IGBT1 is connected with the inductor L and the first diode D 1 The emitter of the first insulated gate bipolar transistor IGBT1 is connected with the negative electrode of the output end of the rectifying circuit 21, and the gate of the first insulated gate bipolar transistor IGBT1 is connected with the control circuit 25;
the control circuit 25 inputs a pulse signal through the gate of the first IGBT1 for controlling the on and off of the first IGBT 1.
Specifically, the control circuit 25 obtains the voltages at the two ends of the capacitor circuit 23, and when the current voltage meets the voltage requirement of the load, the control circuit 25 will not output a pulse signal, and the dc voltage converted by the rectifying circuit 21 passes through the bypass diode D 0 Supplying power to the rear stage; when the current voltage is smaller and the voltage requirement of the load is not met, the control circuit 25 controls the output pulse signal to control the on and off of the first insulated gate bipolar transistor IGBT1 in the boost circuit 22 for charging the capacitor circuit 23 and raising the voltage across the capacitor circuit 23 to meet the voltage requirement of the load.
The control circuit 25 may be provided with a gate driving interface G, and the control circuit 25 is connected to the gate of the first insulated gate bipolar transistor IGBT1 through the gate driving interface G.
In some embodiments, the capacitive circuit 23 may include at least one thin film capacitor. In other embodiments, the capacitor circuit 23 may also employ an electrolytic capacitor, a ceramic capacitor, or a super capacitor.
The above is a frequency converter provided in the embodiments of the present application, which includes a rectifying circuit 21, a bypass diodeD 0 The booster circuit 22, the capacitor circuit 23, the inverter circuit 24, and the control circuit 25 are provided with a bypass diode D between the rectifier circuit 21 and the capacitor circuit 23 0 Set and bypass diode D 0 The parallel boost circuit 22 and the control circuit 25 are used for acquiring the voltages at two ends of the capacitor circuit 23 and controlling the boost circuit 22 to work according to the voltages, thereby realizing the regulation and control of the fluctuating voltages at two ends of the capacitor circuit 23 and ensuring the continuous and reliable operation of the load.
In some embodiments, in order to protect the booster circuit 22 and the control circuit 25, a voltage dividing resistor may also be provided, as will be described in detail below.
Referring to fig. 3, fig. 3 is a schematic diagram of a result of a frequency converter according to another embodiment of the present application, which may include:
a rectifying circuit 21 for converting the received ac voltage into a dc voltage;
bypass diode D 0 Bypass diode D 0 A bypass diode D arranged between the rectifying circuit 21 and the capacitor circuit 23 0 Is connected with the rectifying circuit 21, bypasses the diode D 0 Is connected to a first terminal of the capacitive circuit 23;
a capacitance circuit 23 including at least one capacitance;
an inverter circuit 24 for converting a direct-current voltage into an alternating-current voltage and supplying the alternating-current voltage to a load;
a control circuit 25 for acquiring the voltages at both ends of the capacitor circuit 23 and controlling the operation of the booster circuit 22 according to the voltages;
the voltage preprocessing circuit 26, the voltage preprocessing circuit 26 is disposed between the capacitor circuit 23 and the inverter circuit 24, and is used for reducing the voltage across the capacitor circuit 23 to a voltage range that can be received by the control circuit 25.
In some embodiments, the voltage preprocessing circuit 26 may include at least respective series-arranged voltage dividing resistors.
In some embodiments, as shown in FIG. 3, the voltage is pre-conditionedThe processing circuit 26 may include a first voltage dividing resistor R arranged in series 1 Second voltage-dividing resistor R 2 A third voltage dividing resistor R 3 And a fourth voltage dividing resistor R 4 。
The control circuit 25 may be provided with a voltage acquisition interface Vdc, and the voltage acquisition interface Vdc of the control circuit 25 and a third voltage dividing resistor R 3 And a fourth voltage dividing resistor R 4 The connection points are connected to reduce the voltage across the capacitive circuit 23 to a voltage range that can be received by the control circuit 25.
In some embodiments, the electric frequency device provided by the application can further comprise a fifth voltage dividing resistor R 5 Fifth voltage dividing resistor R 5 A fifth voltage dividing resistor R connected with the emitter of the first IGBT1 5 Is connected to the negative electrode of the output terminal of the rectifying circuit 21.
The control circuit 25 may also be provided with a current collection interface I2, and the control circuit 25 and the fifth voltage dividing resistor R are connected via the current collection interface I2 5 And the connection point between the emitters of the first insulated gate bipolar transistor IGBT1 is used for collecting the current of the booster circuit 22 and outputting the duty ratio of the pulse signal to the booster circuit 22 according to the current control.
Specifically, when the control circuit 25 detects that the current of the boost circuit 22 reaches the preset protection value, the duty ratio of the pulse signal output by the control circuit 25 is not increased any more, so as to protect the boost circuit 22. The preset protection value may be determined according to the power required by the load, and a higher preset protection value may be set correspondingly as the power required by the load is higher.
In some embodiments, the boost circuit 22 may be configured in the same manner as in FIG. 2, and the boost circuit 22 may include an inductor L, a first diode D 1 And a first insulated gate bipolar transistor IGBT1 (Insulated Gate Bipolar Transistor), a first end of the inductor L and a bypass diode D 0 The second end of the inductor L is connected with the first diode D 1 Is connected with the positive electrode of the first diode D 1 Cathode of (D) and bypass diode D 0 Is connected with the negative electrode of the first insulated gate bipolar transistor IGBT1The pole is connected with the inductance L and the first diode D 1 The emitter of the first insulated gate bipolar transistor IGBT1 is connected with the negative electrode of the output end of the rectifying circuit 21, and the gate of the first insulated gate bipolar transistor is connected with the control circuit 25;
the control circuit 25 inputs a pulse signal through the gate of the first IGBT1 for controlling the on and off of the first IGBT 1.
Specifically, the control circuit 25 obtains the voltages at the two ends of the capacitor circuit 23, and when the current voltage meets the voltage requirement of the load, the control circuit 25 will not output a pulse signal, and the dc voltage converted by the rectifying circuit 21 passes through the bypass diode D 0 Supplying power to the rear stage; when the current voltage is smaller and the voltage requirement of the load is not met, the control circuit 25 controls the output pulse signal to control the on and off of the first insulated gate bipolar transistor IGBT1 in the boost circuit 22 for charging the capacitor circuit 23 and raising the voltage across the capacitor circuit 23 to meet the voltage requirement of the load.
The control circuit 25 may be provided with a gate driving interface G, and the control circuit 25 is connected to the gate of the first insulated gate bipolar transistor IGBT1 through the gate driving interface G.
In some embodiments, the rectifying circuit 21 may include a second diode D 2 Third diode D 3 Fourth diode D 4 Fifth diode D 5 Sixth diode D 6 And a seventh diode D 7 Second diode D 2 Third diode D 3 And a fourth diode D 4 Is connected with the negative pole of the fifth diode D 5 Sixth diode D 6 And a seventh diode D 7 A fifth diode D connected to the positive electrode of 5 Is connected with the cathode of the second diode D 2 A sixth diode D 6 Cathode of (D) and third diode D 3 A seventh diode D connected to the positive electrode of 7 Cathode of (D) and fourth diode D 4 Is connected to the positive electrode of the battery.
In some embodiments, the capacitive circuit 23 may include at least one thin film capacitor. In other embodiments, the capacitor circuit 23 may also employ an electrolytic capacitor, a ceramic capacitor, or a super capacitor.
In some embodiments, as shown in fig. 3, the capacitance circuit 23 may include a thin film capacitance C.
In some embodiments, inverter circuit 24 may include a second insulated gate bipolar transistor Z 1 Third insulated gate bipolar transistor Z 2 Fourth insulated gate bipolar transistor Z 3 Fifth insulated gate bipolar transistor Z 4 Sixth insulated gate bipolar transistor Z 5 And a seventh insulated gate bipolar transistor Z 6 Second insulated gate bipolar transistor Z 1 Third insulated gate bipolar transistor Z 2 And a fourth insulated gate bipolar transistor Z 3 Is connected with the collector of the fifth insulated gate bipolar transistor Z 4 Sixth insulated gate bipolar transistor Z 5 And a seventh insulated gate bipolar transistor Z 6 Emitter connection of a second insulated gate bipolar transistor Z 1 Emitter and fifth insulated gate bipolar transistor Z 4 Collector connection of third insulated gate bipolar transistor Z 2 Emitter and sixth insulated gate bipolar transistor Z of (c) 5 Collector connection of a fourth insulated gate bipolar transistor Z 3 Emitter and seventh insulated gate bipolar transistor Z 6 Is connected to the collector of the capacitor.
The control circuit 25 may further include an inverter circuit control interface: UP, UN, VP, VN, WP and WN, in turn with a second IGBT Z 1 Fifth insulated gate bipolar transistor Z 4 Third insulated gate bipolar transistor Z 2 Sixth insulated gate bipolar transistor Z 5 Fourth insulated gate bipolar transistor Z 3 And a seventh insulated gate bipolar transistor Z 6 Is connected to the gate of the transistor.
Second insulated gate bipolar transistor Z 1 Emitter and fifth insulated gate bipolar transistor Z 4 The collector of the transistor is also connected with a current sampling point U, a third insulated gate bipolar transistor Z 2 Emitter and sixth insulated gate bipolar transistor of (c)Z 5 The collector of the transistor is also connected with a current sampling point V, a fourth insulated gate bipolar transistor Z 3 Emitter and seventh insulated gate bipolar transistor Z 6 The current sampling point W may also be connected between the collectors of (c).
The frequency converter provided in another embodiment of the present application may include a rectifying circuit 21, a bypass diode D 0 The step-up circuit 22, the capacitor circuit 23, the inverter circuit 24, the control circuit 25, and the voltage preprocessing circuit 26 are provided with the bypass diode D between the rectifier circuit 21 and the capacitor circuit 23 0 Set and bypass diode D 0 The parallel boost circuit 22 and the control circuit 25 are used for acquiring the voltages at two ends of the capacitor circuit 23 and controlling the boost circuit 22 to work according to the voltages, thereby realizing the regulation and control of the fluctuating voltages at two ends of the capacitor circuit 23 and ensuring the continuous and reliable operation of the load. The voltage preprocessing circuit 26 is disposed between the capacitor circuit 23 and the inverter circuit 24, and is configured to reduce the voltage across the capacitor circuit 23 to a voltage range acceptable to the control circuit 25. The control circuit 25 may also be provided with a current collection interface I2, and the control circuit 25 and the fifth voltage dividing resistor R are connected via the current collection interface I2 5 And the connection point between the emitters of the first insulated gate bipolar transistor IGBT1 is used for collecting the current of the booster circuit 22 and outputting the duty ratio of the pulse signal to the booster circuit 22 according to the current control.
Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.
Claims (10)
1. A frequency converter, comprising:
the rectification circuit is used for converting the received alternating voltage into direct voltage;
the bypass diode is arranged between the rectifying circuit and the capacitor circuit, the anode of the bypass diode is connected with the rectifying circuit, and the cathode of the bypass diode is connected with the first end of the capacitor circuit;
the boost circuit is arranged in parallel with the bypass diode;
the capacitor circuit comprises at least one capacitor;
an inverter circuit for converting the DC voltage into an AC voltage and supplying the AC voltage to a load;
and the control circuit is used for acquiring the voltages at two ends of the capacitor circuit and controlling the booster circuit to work according to the voltages.
2. The frequency converter according to claim 1, wherein the boost circuit comprises an inductor, a first diode and a first insulated gate bipolar transistor, a first end of the inductor is connected with an anode of the bypass diode, a second end of the inductor is connected with an anode of the first diode, a cathode of the first diode is connected with a cathode of the bypass diode, a collector of the first insulated gate bipolar transistor is connected between the inductor and the first diode, an emitter of the first insulated gate bipolar transistor is connected with a cathode of the rectifying circuit output, and a gate of the first insulated gate bipolar transistor is connected with the control circuit;
the control circuit inputs pulse signals through the gate electrode of the first insulated gate bipolar transistor and is used for controlling the on and off of the first insulated gate bipolar transistor.
3. The frequency converter of claim 1, further comprising a voltage preprocessing circuit disposed between the capacitive circuit and the inverter circuit for reducing a voltage across the capacitive circuit to a voltage range acceptable to the control circuit.
4. A frequency converter according to claim 3, wherein the voltage pre-processing circuit comprises at least two voltage dividing resistors arranged in series.
5. The frequency converter of claim 4, wherein the voltage preprocessing circuit comprises a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor, and a fourth voltage dividing resistor arranged in series; and a voltage acquisition interface of the control circuit is connected with a connection point between the third voltage dividing resistor and the fourth voltage dividing resistor.
6. The frequency converter according to claim 2, further comprising a fifth voltage dividing resistor, wherein a first end of the fifth voltage dividing resistor is connected to an emitter of the first insulated gate bipolar transistor, and a second end of the fifth voltage dividing resistor is connected to a negative electrode of the rectifying circuit output terminal;
the current acquisition interface of the control circuit is connected with a connection point between the fifth voltage dividing resistor and the emitter of the first insulated gate bipolar transistor and is used for acquiring the current of the booster circuit and controlling the duty ratio of outputting pulse signals to the booster circuit according to the current.
7. A transducer according to any of claims 1 to 6, wherein the capacitance is a thin film capacitance.
8. The frequency converter according to claim 1, wherein the rectifying circuit includes a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, and a seventh diode, wherein the second diode, the third diode, and the negative electrode of the fourth diode are connected, wherein the positive electrode of the fifth diode, the sixth diode, and the positive electrode of the seventh diode are connected, wherein the negative electrode of the fifth diode is connected to the positive electrode of the second diode, wherein the negative electrode of the sixth diode is connected to the positive electrode of the third diode, and wherein the negative electrode of the seventh diode is connected to the positive electrode of the fourth diode.
9. The frequency converter of claim 1, wherein the control circuit further comprises an inverter circuit control interface to control the inverter circuit to generate an ac voltage.
10. The frequency converter according to claim 1, wherein the inverter circuit includes a second insulated gate bipolar transistor, a third insulated gate bipolar transistor, a fourth insulated gate bipolar transistor, a fifth insulated gate bipolar transistor, a sixth insulated gate bipolar transistor, and a seventh insulated gate bipolar transistor, wherein collectors of the second insulated gate bipolar transistor, the third insulated gate bipolar transistor, and the fourth insulated gate bipolar transistor are connected, emitters of the fifth insulated gate bipolar transistor, the sixth insulated gate bipolar transistor, and the seventh insulated gate bipolar transistor are connected, emitters of the second insulated gate bipolar transistor and the fifth insulated gate bipolar transistor are connected, collectors of the third insulated gate bipolar transistor and the sixth insulated gate bipolar transistor are connected, and emitters of the fourth insulated gate bipolar transistor and collectors of the seventh insulated gate bipolar transistor are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223597692.1U CN219087012U (en) | 2022-12-29 | 2022-12-29 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223597692.1U CN219087012U (en) | 2022-12-29 | 2022-12-29 | Frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219087012U true CN219087012U (en) | 2023-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223597692.1U Active CN219087012U (en) | 2022-12-29 | 2022-12-29 | Frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219087012U (en) |
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2022
- 2022-12-29 CN CN202223597692.1U patent/CN219087012U/en active Active
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