CN220732595U - Switch tube negative-pressure driving circuit, electronic circuit and air conditioner - Google Patents
Switch tube negative-pressure driving circuit, electronic circuit and air conditioner Download PDFInfo
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- CN220732595U CN220732595U CN202322397842.2U CN202322397842U CN220732595U CN 220732595 U CN220732595 U CN 220732595U CN 202322397842 U CN202322397842 U CN 202322397842U CN 220732595 U CN220732595 U CN 220732595U
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Abstract
The application provides a switching tube negative-pressure driving circuit, an electronic circuit and an air conditioner, which comprise a bridge circuit and a plurality of driving modules, wherein the bridge circuit comprises two bridge arms, and each bridge arm comprises a bridge tube connected in series; the driving modules are connected with the bridge pipes in a one-to-one correspondence manner, and the input sides of all the driving modules are connected to the same power supply; each driving module comprises a driving unit and a negative pressure stabilizing unit, the power supply end of the driving unit is connected to a power supply, the first output end of the driving unit is connected to the control end of the bridge pipe through the negative pressure stabilizing unit, and the second output end of the driving unit is connected to an output end of the bridge pipe. When the driving unit outputs high level, the bridge tube can be controlled to be conducted and the negative pressure stabilizing unit can be charged, so that the negative pressure stabilizing unit can carry out negative pressure driving on the bridge tube when the driving unit outputs low level, a plurality of driving modules can be connected to the same power supply, the limitation of high-voltage electric gap and creepage distance requirements is avoided, and miniaturization is achieved.
Description
Technical Field
The application relates to the technical field of electronic circuits, in particular to a switching tube negative-pressure driving circuit, an electronic circuit and an air conditioner.
Background
In the related art, for the existing negative pressure driving mode of the switching tube, a negative pressure driving mode of the switching power supply is often adopted to output negative pressure to drive the switching tube. Therefore, for the existing bridge circuit, since the bridge circuit comprises a plurality of switching tubes, and for each switching tube, an independent switching power supply winding is often required to supply power to the switching power supply winding, a plurality of switching power supply windings are often required to be synchronously arranged in the existing bridge circuit; moreover, since the safe distance between the windings of the switching power supply needs to meet the requirements of high-voltage electric gap and creepage distance, it is difficult to achieve miniaturization of the power supply and electric control.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a switching tube negative-pressure driving circuit, an electronic circuit and an air conditioner, and aims to achieve miniaturization of the circuit.
In a first aspect, an embodiment of the present application provides a switching tube negative voltage driving circuit, including:
the bridge circuit comprises two bridge arms connected in parallel, wherein each bridge arm comprises a bridge tube connected in series;
the driving modules are connected with the bridge pipes in a one-to-one correspondence manner, and the input sides of all the driving modules are connected to the same power supply;
each driving module comprises a driving unit and a negative pressure voltage stabilizing unit, the power supply end of the driving unit is used for being connected to the power supply, the first output end of the driving unit is connected to the control end of the bridge pipe through the negative pressure voltage stabilizing unit, and the second output end of the driving unit is connected to an output end of the bridge pipe.
According to some embodiments of the present application, the driving module further includes a unidirectional conduction unit, an anode of the unidirectional conduction unit is used for being connected to the power supply, and a cathode of the unidirectional conduction unit is connected to a power supply end of the driving unit.
According to some embodiments of the present application, the driving module further includes a first resistor and a second resistor, one end of the first resistor is connected to the negative pressure stabilizing unit, and the other end is connected to the control end of the bridge pipe; one end of the second resistor is connected to the control end of the bridge tube, and the other end of the second resistor is connected to an output end of the bridge tube.
According to some embodiments of the present application, the driving unit includes a driving chip and a first energy storage device, a power supply end of the driving chip is used for being connected to the power supply, a first output end of the driving chip is connected to a control end of the bridge pipe through the negative pressure stabilizing unit, and a second output end of the driving chip is connected to an output end of the bridge pipe; one end of the first energy storage device is connected to the power supply end of the driving chip, and the other end of the first energy storage device is connected to the second output end of the driving chip.
According to some embodiments of the present application, the negative pressure voltage stabilizing unit includes a second energy storage device and a voltage stabilizing device, one ends of the second energy storage device and the voltage stabilizing device are all connected to the first output end of the driving unit, and the other ends of the second energy storage device and the voltage stabilizing device are all connected to the control end of the bridge pipe.
According to some embodiments of the present application, two bridge arms in the switching tube negative voltage driving circuit are a first bridge arm and a second bridge arm, the first bridge arm includes a first upper bridge tube and a first lower bridge tube connected in series, and the second bridge arm includes a second upper bridge tube and a second lower bridge tube connected in series.
According to some embodiments of the present application, a first intermediate connection point is between the first upper bridge pipe and the first lower bridge pipe, a second intermediate connection point is between the second upper bridge pipe and the second lower bridge pipe, and the first intermediate connection point and the second intermediate connection point are used for being connected to an input power source.
In a second aspect, an embodiment of the present application provides an electronic circuit, including the switching tube negative voltage driving circuit of the first aspect.
According to some embodiments of the application, the electronic circuit is a synchronous rectification circuit, a totem pole power factor correction circuit, or a bridge inverter circuit.
In a third aspect, an embodiment of the present application provides an air conditioner, including the switching tube negative pressure driving circuit of the first aspect or the electronic circuit of the second aspect.
According to the technical scheme of the embodiment of the application, the technical effects include but are not limited to the following: the switching tube negative-pressure driving circuit comprises a bridge circuit and a plurality of driving modules, wherein the bridge circuit comprises two bridge arms connected in parallel, and each bridge arm comprises a bridge tube connected in series; the driving modules are connected with the bridge pipes in a one-to-one correspondence manner, and the input sides of all the driving modules are connected to the same power supply; each driving module comprises a driving unit and a negative pressure stabilizing unit, the power supply end of the driving unit is used for being connected to a power supply, the first output end of the driving unit is connected to the control end of the bridge pipe through the negative pressure stabilizing unit, and the second output end of the driving unit is connected to an output end of the bridge pipe. Because this application embodiment has add negative pressure steady voltage unit between drive unit and bridge pipe, control bridge pipe switch on and fill can to negative pressure steady voltage unit when drive unit output high level, thereby make negative pressure steady voltage unit carry out negative pressure drive in order to turn off the bridge pipe fast to the bridge pipe when drive unit output low level, consequently, this application embodiment is different from current mode that adopts switching power supply direct output negative pressure to carry out negative pressure drive to the switch pipe, so, this application embodiment can be unified to be connected to same power supply with the input side of a plurality of drive modules, thereby can not receive the restriction of high voltage electric gap and creepage distance requirement, and then realize the miniaturization of power and automatically controlled.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The accompanying drawings are included to provide a further understanding of the technical aspects of the present application, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present application and together with the examples of the present application, and not constitute a limitation of the technical aspects of the present application.
Fig. 1 is a schematic structural diagram of a switching tube negative voltage driving circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a power supply connected to a switching tube negative voltage driving circuit according to an embodiment of the present disclosure;
FIG. 3 is a schematic waveform diagram of a switching tube negative voltage driving circuit according to an embodiment of the present disclosure during a negative voltage start-up process;
fig. 4 is a schematic waveform diagram of a switching tube negative voltage driving circuit after a negative voltage starting optimization in a starting process according to an embodiment of the present application;
fig. 5 is a driving timing diagram of a switching tube negative voltage driving circuit according to an embodiment of the present application when the switching tube negative voltage driving circuit is applied to a bridge inverter circuit;
fig. 6 is a driving timing diagram of a switching tube negative voltage driving circuit according to an embodiment of the present application when the switching tube negative voltage driving circuit is applied to a synchronous rectification circuit or a totem pole power correction circuit.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that references to orientation descriptions, such as directions of up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, greater than, less than, exceeding, etc. are understood to not include the present number, and the meaning of a number above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical solution.
In some cases, for the existing negative pressure driving mode of the switching tube, the negative pressure driving mode of the switching power supply is often adopted to output negative pressure to drive the switching tube. Therefore, for the existing bridge circuit, since the bridge circuit comprises a plurality of switching tubes, and for each switching tube, an independent switching power supply winding is often required to supply power to the switching power supply winding, a plurality of switching power supply windings are often required to be synchronously arranged in the existing bridge circuit; moreover, since the safe distance between the windings of the switching power supply needs to meet the requirements of high-voltage electric gap and creepage distance, it is difficult to achieve miniaturization of the power supply and electric control.
Based on the above situation, the embodiment of the application provides a switching tube negative voltage driving circuit, an electronic circuit and an air conditioner, which aim to realize miniaturization of a power supply and electric control.
Various embodiments of the switching tube negative voltage driving circuit of the present application are further described below with reference to the accompanying drawings.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a switching tube negative voltage driving circuit according to an embodiment of the present application. The switching tube negative voltage driving circuit of the embodiment of the application includes, but is not limited to, a driving module 120 and a bridge circuit 110, specifically, the bridge circuit 110 includes, but is not limited to, two bridge arms, and the two bridge arms are connected in parallel, and each bridge arm includes a bridge tube connected in series; in addition, the number of the driving modules 120 is plural, and the driving modules 120 and the bridge pipes are connected in one-to-one correspondence, and the input sides of all the driving modules 120 are connected to the same power supply.
In an embodiment, for each driving module 120, it includes, but is not limited to, a driving unit 121 and a negative pressure stabilizing unit 122, where the driving unit 121 is provided with a power supply end, a first output end and a second output end, the driving unit 121 is connected to the power supply through the power supply end, the driving unit 121 is connected to the control end of the bridge pipe through the first output end and the negative pressure stabilizing unit 122, and the driving unit 121 is connected to an output end of the bridge pipe through the second output end.
Because this embodiment has add negative pressure steady voltage unit 122 between drive unit 121 and bridge pipe, control bridge pipe switch on and fill can to negative pressure steady voltage unit 122 when drive unit 121 output high level, thereby make negative pressure steady voltage unit 122 can carry out negative pressure drive in order to turn off the bridge pipe fast to the bridge pipe when drive unit 121 output low level, consequently, this embodiment is different from current mode that adopts switching power supply direct output negative pressure to carry out negative pressure drive to the switch pipe, so, this embodiment of the application can be unified to be connected to same power supply with the input side of a plurality of drive module 120, thereby can not receive the restriction of high voltage electric gap and creepage distance requirement, and then realize power and automatically controlled miniaturization.
It should be noted that, regarding the bridge tube, that is, the switching tube, it may be a field effect tube, a triode, or other switching tubes capable of controlling on/off, the embodiment of the present application does not specifically limit the structure type of the switching tube.
It will be appreciated that with respect to the bridge tube described above, it may be a switching tube corresponding to the switching tubes Q1, Q2, Q3 and Q4 shown in fig. 1.
For example, as shown in fig. 1, when a field-effect transistor is used as the bridge tube, the embodiment of the present application may connect the gate of the field-effect transistor to the first output terminal of the driving unit 121 through the negative voltage regulator unit 122, and connect the source of the field-effect transistor to the second output terminal of the driving unit 121.
In addition, regarding the power supply described above, the power supply may be in the form of a switching power supply winding as shown in fig. 2, or may be in the form of another power supply, and the configuration of the power supply is not particularly limited in the embodiment of the present application.
In an embodiment, as shown in fig. 1, the driving module 120 further includes, but is not limited to, a unidirectional conduction unit, wherein an anode of the unidirectional conduction unit is used for being connected to a power supply, and a cathode of the unidirectional conduction unit is connected to a power supply end of the driving unit 121.
Specifically, the embodiment of the present application can perform a function of unidirectional conduction of the current supplied from the power supply to the driving unit 121 by the unidirectional conduction unit. It is understood that, regarding the unidirectional conductive cell described above, a diode may be included, but is not limited thereto.
It will be appreciated that with respect to the unidirectional conducting cell described above, diodes D6 and D7 may be provided corresponding to those shown in fig. 1.
In an embodiment, as shown in fig. 1, the driving module 120 further includes, but is not limited to, a first resistor and a second resistor, wherein one end of the first resistor is connected to the negative pressure stabilizing unit 122, and the other end is connected to the control end of the bridge pipe; one end of the second resistor is connected to the control end of the bridge tube, and the other end of the second resistor is connected to an output end of the bridge tube.
It should be noted that, regarding the above-mentioned first resistor, its function is mainly used for current limiting, and plays the role of reducing the opening oscillation of the bridge tube; in addition, regarding the second resistor, the effect is mainly to pull down the bridge tube in the off state, and to release the current.
It will be appreciated that with respect to the first resistance described above, it may be the resistances R1, R2, R3 and R4 corresponding to those shown in fig. 1; regarding the above-described second resistance, the resistances R5, R6, R7, and R8 corresponding to those shown in fig. 1 may be mentioned.
In one embodiment, as shown in fig. 1, the driving unit 121 includes a driving chip and a first energy storage device, a power supply end of the driving chip is used for being connected to a power supply, a first output end of the driving chip is connected to a control end of the bridge pipe through the negative pressure voltage stabilizing unit 122, and a second output end of the driving chip is connected to an output end of the bridge pipe; one end of the first energy storage device is connected to the power supply end of the driving chip, and the other end of the first energy storage device is connected to the second output end of the driving chip.
Specifically, the first energy storage device is connected between the power supply end and the second output end of the driving chip, and can supply power for the driving chip after energy storage is completed as the energy storage device of the driving chip.
It will be appreciated that with respect to the above-described driving chip, it may be a chip Drive corresponding to that shown in fig. 1.
In addition, it is understood that, regarding the above-described first energy storage device, it may be a capacitor corresponding to the capacitances C6, C7, C8, and C9 shown in fig. 1.
In one embodiment, as shown in fig. 1, the negative pressure stabilizing unit 122 includes a second energy storage device and a voltage stabilizing device, one ends of the second energy storage device and the voltage stabilizing device are connected to the first output end of the driving unit 121, and the other ends of the second energy storage device and the voltage stabilizing device are connected to the control end of the bridge pipe.
Specifically, when the driving unit 121 outputs a high level through the first output end, the driving bridge tube is conducted through the second energy storage device, and the negative pressure voltage stabilizing unit 122 is charged at the same time, when the voltage on the second energy storage device exceeds the voltage of the voltage stabilizing device, current passes through the voltage stabilizing device, and at the moment, the voltage at two ends of the second energy storage device is clamped; in addition, when the driving unit 121 outputs a low level through the first output end, since the second energy storage device is charged, when the driving unit 121 outputs a low level, the negative electrode end of the second energy storage device is loaded at the control end of the bridge pipe, and the positive electrode end of the second energy storage device is loaded at an output end of the bridge pipe through the driving unit 121, so that the bridge pipe is driven under negative pressure to rapidly turn off the bridge pipe.
It will be appreciated that with respect to the second energy storage device described above, it may be a capacitor corresponding to the capacitances C1, C2, C3 and C4 shown in fig. 1.
In addition, it is understood that, regarding the above-described voltage stabilizing device, it may be a voltage stabilizing diode D1 corresponding to that shown in fig. 1.
In an embodiment, as shown in fig. 1, two bridge arms in the switching tube negative voltage driving circuit are a first bridge arm 111 and a second bridge arm 112, where the first bridge arm 111 includes a first upper bridge tube Q1 and a first lower bridge tube Q3 connected in series, and the second bridge arm 112 includes a second upper bridge tube Q2 and a second lower bridge tube Q4 connected in series.
In one embodiment, as shown in fig. 1, a first intermediate connection point L is between the first upper bridge pipe Q1 and the first lower bridge pipe Q3, a second intermediate connection point N is between the second upper bridge pipe Q2 and the second lower bridge pipe Q4, and the first intermediate connection point L and the second intermediate connection point N are used for being connected to an input power source.
Specifically, the first intermediate connection point L and the second intermediate connection point N may be connected to an ac input power source or may be connected to a dc input power source, which is not particularly limited in the embodiment of the present application.
Based on the switching tube negative-pressure driving circuit of each embodiment, specific embodiments of the switching tube negative-pressure driving circuit of the present application are respectively presented below.
In one embodiment, as shown in fig. 1, the switching tube negative voltage driving circuit may be formed into a bridge circuit 110 by four switching tubes Q1 to Q4. The circuit can realize input voltage rectification and power factor correction of a totem pole circuit and a full-bridge inverter circuit. The switching tube Q1 is an upper bridge tube, the driving power supply of the switching tube in the circuit realizes the bootstrap power supply of the driving chip Drive by the diode D6, and when the lower bridge tube Q3 is turned on, the power supply VCC provides a charging loop for the capacitor C6 through the diode D6, the capacitor C6 and the switching tube Q3. When the driving chip Drive outputs a high level, the driving chip Drive drives the switching transistor Q1 through the capacitor C1 and the resistor R1. When the voltage across the capacitor C1 exceeds the voltage Uz of the zener diode D1, current passes through the zener diode D1, at which point the voltage across the capacitor is clamped to the power supply Uz. When the driving chip Drive outputs a low level, the capacitor C1 drives the switching tube Q1 to be turned off through the driving chip Drive and the resistor R1. When the driving chip Drive outputs a low level, the negative electrode terminal of the capacitor C1 is loaded at the gate terminal of the Q1 through the resistor R1, the positive electrode terminal of the capacitor C1 is loaded at the source terminal of the switching tube Q1 through the driving chip Drive, and at this time, the voltages of the gate and the source of the switching tube Q1 are-Uz, thereby realizing negative-pressure driving.
Note that, the switching transistors Q2 to Q4 shown in fig. 1 have a negative-pressure driving principle identical to that of the switching transistor Q1.
As shown in fig. 3, fig. 3 is a schematic waveform diagram of a switching tube negative voltage driving circuit according to an embodiment of the present application during a negative voltage start-up process; after a plurality of driving pulses, the positive voltage and the negative voltage loaded on the grid electrode and the source electrode of the switching tube can be stabilized. Thereby realizing normal negative pressure driving.
However, there is a certain disadvantage in the waveforms of fig. 3, namely that the first few pulses of the circuit are turned on with a low negative voltage value. This can be solved by: firstly, a lower bridge tube of the bridge circuit 110 is started, at the moment, a power supply charges an energy storage capacitor C6 of a driving chip of an upper bridge tube, and meanwhile, a driving signal of the lower bridge tube charges a capacitor C3, so that driving power supply of the upper bridge tube and negative pressure power supply of the lower bridge tube are realized in the process; then the lower bridge tube is closed and the upper bridge tube is opened. After the upper bridge tube is opened, the driving chip charges the negative-pressure capacitor. By the method, the optimized waveform diagram shown in fig. 4 can be obtained, so that negative pressure starting can be realized rapidly during switching pulse output.
Based on the switching tube negative-pressure driving circuit of each of the above embodiments, each of the embodiments of the electronic circuit of the present application is set forth below, respectively.
An embodiment of the present application further provides an electronic circuit, including the switching tube negative voltage driving circuit of any one of the embodiments.
It should be noted that, since the electronic circuit of the embodiment of the present application includes the switching tube negative voltage driving circuit of any one of the embodiments described above, reference may be made to the specific implementation and technical effects of the switching tube negative voltage driving circuit of any one of the embodiments described above.
It should be noted that, regarding the above electronic circuit, different circuit types may be set according to different application scenarios, where the electronic circuit in the embodiment of the present application may be a synchronous rectification circuit, a totem pole power factor correction circuit, or a bridge inverter circuit, and the type of the electronic circuit is not specifically limited in the embodiment of the present application.
The scheme is slightly different from the scheme for the synchronous rectification circuit, the totem-pole power factor correction circuit and the bridge type inverter circuit.
As shown in fig. 5, fig. 5 is a driving timing diagram of a switching tube negative voltage driving circuit according to an embodiment of the present application when the switching tube negative voltage driving circuit is applied to a bridge inverter circuit.
In an embodiment, as shown in the left waveform of fig. 5, for a bridge inverter circuit, the switching tube Q3 and the switching tube Q4 can be turned on first to charge the energy storage capacitors C6 and C7 of the driving chips of the upper bridge tube at the same time, and at this time, both ends of the load are connected to the ground, which has no influence on the power supply and the circuit. Then, the switching tube Q3 and the switching tube Q4 are closed, the switching tube Q1 and the switching tube Q2 are opened to charge the negative pressure driving capacitors C1 and C2 of the switching tube, and at the moment, both ends of a load are connected to P+ of a power supply, so that the power supply and a circuit are not influenced. All the capacitors are charged and enter a normal running state.
In addition, in an embodiment, as shown in the right waveform of fig. 5, in the high-speed control mode, the upper bridge pipe and the lower bridge pipe are alternately turned on and off, and the operation is repeated based on a first predetermined period, for example, in the case where the switching transistors Q1 and Q2 are in the on state, the switching transistors Q3 and Q4 are in the off state; with the switching transistors Q1 and Q2 in the off state, the switching transistors Q3 and Q4 are in the on state.
It should be noted that, since the magnitude of the load parameter is correspondingly matched with different control modes, when the load parameter changes, the control modes can be switched according to the embodiment of the present application.
It will be appreciated that, regarding the load parameter, the current parameter, the power parameter, the torque parameter, the rotational speed parameter, and other types of parameters may be used, and the type of the load parameter is not particularly limited in the embodiments of the present application.
For example, in the case where the load parameter is a current parameter, when the current parameter is smaller than the first predetermined value, the embodiment of the present application may execute the bridge inversion mode as shown in the left waveform of fig. 5 at this time; when the current parameter is equal to or greater than the first predetermined value, then the embodiment of the present application may now execute the high-speed control mode as shown by the waveform on the right side of fig. 5. Or, for the switching case, when the current parameter changes from being smaller than the first predetermined value to being equal to or larger than the first predetermined value, the embodiment of the present application may respond to switching the bridge inversion mode as shown in the left-hand waveform of fig. 5 to the high-speed control mode as shown in the right-hand waveform of fig. 5; when the current parameter changes from equal to or greater than the first predetermined value to less than the first predetermined value, embodiments of the present application may switch the high-speed control mode as shown by the waveform on the right side of fig. 5 to the bridge inversion mode as shown by the waveform on the left side of fig. 5 in response.
In addition, it can be understood that, regarding the above-mentioned first predetermined value, the value of the first predetermined value may be set according to the real-time state of the circuit, or may be preset, and the value of the first predetermined value is not specifically limited in this embodiment of the present application.
In addition, it can be understood that, regarding the above-mentioned first predetermined period, the first predetermined period may be set according to a real-time state of the circuit, or may be preset, and the duration of the first predetermined period is not specifically limited in this embodiment of the present application.
As shown in fig. 6, fig. 6 is a driving timing diagram of a switching tube negative voltage driving circuit according to an embodiment of the present application when the switching tube negative voltage driving circuit is applied to a synchronous rectification circuit or a totem pole power correction circuit.
In an embodiment, as shown in the left waveform of fig. 6, for the synchronous rectification circuit or the totem pole power correction circuit, when the L line is positive, the switching tube Q4 is controlled to be turned on, and the switching tube driving chip energy storage capacitor C7 is charged, and the switching tube negative pressure driving capacitor C4 is charged. When the N line is positive, the Q4 is closed, the Q3 is opened, and at the moment, the switching tube drives the chip energy storage capacitor C6 to charge, and the switching tube negative pressure drives the capacitor C3 to charge. When the L line is positive for the second time, Q1 and Q4 are opened, at the moment, the switching tube negative pressure drives the capacitor C1 to charge, and the switching tube drives the chip energy storage capacitor C7 to charge. When the N line is positive for the second time, Q2 and Q3 are opened, at the moment, the switching tube negative pressure drives the capacitor C3 to charge, and the switching tube drives the chip energy storage capacitor C6 to charge. All the capacitors are charged and enter a normal running state.
In addition, in an embodiment, as shown in the right waveform of fig. 6, in the high-speed control mode, the switching transistors Q1 and Q3 are alternately turned on and off, and the operation is repeated for a second predetermined period, while the switching transistor Q4 is controlled to be turned on and the switching transistor Q2 is controlled to be turned off when the L line is positive, and the switching transistor Q2 is controlled to be turned off and the switching transistor Q4 is controlled to be turned on when the N line is positive.
It should be noted that, since the magnitude of the load parameter is correspondingly matched with different control modes, when the load parameter changes, the control modes can be switched according to the embodiment of the present application.
It will be appreciated that, regarding the load parameter, the current parameter, the power parameter, the torque parameter, the rotational speed parameter, and other types of parameters may be used, and the type of the load parameter is not particularly limited in the embodiments of the present application.
For example, in the case where the load parameter is a current parameter, when the current parameter is smaller than the second predetermined value, the embodiment of the present application may execute the synchronous rectification mode as shown in the left waveform of fig. 6 at this time; when the current parameter is equal to or greater than the second predetermined value, then the embodiment of the present application may now execute the high-speed control mode as shown by the waveform on the right side of fig. 6. Or, for the switching case, when the current parameter changes from being smaller than the second predetermined value to being equal to or larger than the second predetermined value, the embodiment of the present application may switch the synchronous rectification mode as shown in the left-hand waveform of fig. 6 to the high-speed control mode as shown in the right-hand waveform of fig. 6 in response; when the current parameter changes from equal to or greater than the second predetermined value to less than the second predetermined value, embodiments of the present application may switch the high-speed control mode as shown in the right-hand waveform of fig. 6 to the synchronous rectification mode as shown in the left-hand waveform of fig. 6 in response.
In addition, it can be understood that, regarding the above-mentioned second predetermined value, the value of the second predetermined value may be set according to the real-time state of the circuit, or may be preset, and the value of the second predetermined value is not specifically limited in this embodiment of the present application.
In addition, it can be understood that, regarding the above-mentioned second predetermined period, the second predetermined period may be set according to a real-time state of the circuit, or may be preset, and the duration of the second predetermined period is not specifically limited in this embodiment of the present application.
Based on the switching tube negative voltage driving circuit and the electronic circuit of each of the above embodiments, each of the embodiments of the air conditioner of the present application is set forth below, respectively.
An embodiment of the present application provides an air conditioner, including the switching tube negative pressure driving circuit of any one of the above embodiments or the electronic circuit of any one of the above embodiments.
It should be noted that, since the air conditioner according to the embodiment of the present application includes the switching tube negative voltage driving circuit or the electronic circuit according to any one of the embodiments described above, specific implementations and technical effects of the air conditioner according to the embodiment of the present application may refer to specific implementations and technical effects of the switching tube negative voltage driving circuit or the electronic circuit according to any one of the embodiments described above.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," "assembled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, and may also be in communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Although the embodiments disclosed in the present application are described above, the embodiments are only used for facilitating understanding of the present application, and are not intended to limit the present application. Any person skilled in the art to which this application pertains will be able to make any modifications and variations in form and detail of implementation without departing from the spirit and scope of the disclosure, but the scope of the patent claims of this application shall be defined by the appended claims.
While the preferred embodiments of the present application have been described in detail, the present application is not limited to the above embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit and scope of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (10)
1. A switching tube negative voltage driving circuit, comprising:
the bridge circuit comprises two bridge arms connected in parallel, wherein each bridge arm comprises a bridge tube connected in series;
the driving modules are connected with the bridge pipes in a one-to-one correspondence manner, and the input sides of all the driving modules are connected to the same power supply;
each driving module comprises a driving unit and a negative pressure voltage stabilizing unit, the power supply end of the driving unit is used for being connected to the power supply, the first output end of the driving unit is connected to the control end of the bridge pipe through the negative pressure voltage stabilizing unit, and the second output end of the driving unit is connected to an output end of the bridge pipe.
2. The switching tube negative voltage driving circuit according to claim 1, wherein the driving module further comprises a unidirectional conduction unit, an anode of the unidirectional conduction unit is used for being connected to the power supply, and a cathode of the unidirectional conduction unit is connected to a power supply end of the driving unit.
3. The switching tube negative voltage driving circuit according to claim 1, wherein the driving module further comprises a first resistor and a second resistor, one end of the first resistor is connected to the negative voltage stabilizing unit, and the other end is connected to the control end of the bridge tube; one end of the second resistor is connected to the control end of the bridge tube, and the other end of the second resistor is connected to an output end of the bridge tube.
4. The switching tube negative voltage driving circuit according to claim 1, wherein the driving unit comprises a driving chip and a first energy storage device, a power supply end of the driving chip is used for being connected to the power supply, a first output end of the driving chip is connected to a control end of the bridge tube through the negative voltage stabilizing unit, and a second output end of the driving chip is connected to an output end of the bridge tube; one end of the first energy storage device is connected to the power supply end of the driving chip, and the other end of the first energy storage device is connected to the second output end of the driving chip.
5. The switching tube negative voltage driving circuit according to claim 4, wherein the negative voltage stabilizing unit comprises a second energy storage device and a voltage stabilizing device, one ends of the second energy storage device and the voltage stabilizing device are connected to the first output end of the driving unit, and the other ends of the second energy storage device and the voltage stabilizing device are connected to the control end of the bridge tube.
6. The switching tube negative voltage driving circuit according to any one of claims 1 to 5, wherein two of the bridge arms in the switching tube negative voltage driving circuit are a first bridge arm including a first upper bridge tube and a first lower bridge tube connected in series, and a second bridge arm including a second upper bridge tube and a second lower bridge tube connected in series, respectively.
7. The switching tube negative voltage driving circuit according to claim 6, wherein a first intermediate connection point is arranged between the first upper bridge tube and the first lower bridge tube, a second intermediate connection point is arranged between the second upper bridge tube and the second lower bridge tube, and the first intermediate connection point and the second intermediate connection point are used for being connected to an input power supply.
8. An electronic circuit comprising a switching tube negative voltage driving circuit according to any one of claims 1 to 7.
9. The electronic circuit of claim 8, wherein the electronic circuit is a synchronous rectification circuit, a totem pole power factor correction circuit, or a bridge inverter circuit.
10. An air conditioner comprising the switching tube negative voltage driving circuit according to any one of claims 1 to 7 or the electronic circuit according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322397842.2U CN220732595U (en) | 2023-09-04 | 2023-09-04 | Switch tube negative-pressure driving circuit, electronic circuit and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322397842.2U CN220732595U (en) | 2023-09-04 | 2023-09-04 | Switch tube negative-pressure driving circuit, electronic circuit and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118539717A (en) * | 2024-07-25 | 2024-08-23 | 惠州市乐亿通科技股份有限公司 | Inverter, driving device and driving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118539717A (en) * | 2024-07-25 | 2024-08-23 | 惠州市乐亿通科技股份有限公司 | Inverter, driving device and driving method |
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