Drive circuit, inverter, and electronic device

Abstract

The utility model discloses a driving circuit, an inverter and an electronic device, the driving circuit comprises a capacitor module, a first potential control module and a second potential control module, and a first connection state and a second connection state are both in a disconnected state in a first time period. The first potential control module controls the potential of the first end of the capacitor module to be a first potential, the first connection state and the second connection state are both in a conducting state in the second time period, and the first potential control module controls the potential of the second end of the capacitor module to be equal to or approximately equal to the first potential. In this way, the potential of the first end of the coil in the second time period can reach two times of the first potential, and the potential of the second end of the coil is the potential of the grounding end, so that voltage-multiplying power-on of the coil of the relay is achieved, the pull-in speed is increased, the loss of the coil is reduced, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuit, in particular to a driving circuit, an inverter and an electronic device. BACKGROUND

[0002] As a switching element, when the coil of the relay is powered, the current flowing through the coil generates a magnetic field, which makes the normally closed contact disconnect and the normally open contact close; when the coil of the relay is powered off, the magnetic field disappears, the normally closed contact closes, and the normally open contact disconnects.

[0003] However, in the process of use, the coil of the relay has the problem of excessive loss, which reduces the service life. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a driving circuit, an inverter and an electronic device to alleviate the technical problem of excessive loss of the coil of the relay.

[0005] In a first aspect, the present application provides a driving circuit, which comprises a capacitor module, a first potential control module and a second potential control module, the first end of the capacitor module is connected with the first end of the coil of the relay; the first potential control module is connected with the first end of the capacitor module, the first node, the first control end and the first voltage end; the second potential control module is connected with the second end of the coil, the first node, the second end of the capacitor module, the ground end and the second control end, and the second potential control module is configured to control the first connection state between the ground end and the second end of the coil and the second connection state between the first node and the second end of the capacitor module according to the signal of the second control end; wherein in the first time period, the first connection state and the second connection state are both in the open state, and the first potential control module controls the potential of the first end of the capacitor module to be the first potential; in the second time period, the first connection state and the second connection state are both in the on state, and the first potential control module controls the potential of the second end of the capacitor module to be equal to or approximately equal to the first potential.

[0006] In a second aspect, the present application provides an inverter, which comprises the above-mentioned driving circuit.

[0007] In a third aspect, the present application provides an electronic device, which comprises the above-mentioned driving circuit or inverter.

[0008] The driving circuit, the inverter and the electronic device provided by the application can achieve the following effects. In the first time period, the first connection state and the second connection state are both in the open state, the first potential control module controls the potential of the first end of the capacitor module to be the first potential, in the second time period, the first connection state and the second connection state are both in the conducting state, the first potential control module controls the potential of the second end of the capacitor module to be equal to or approximately equal to the first potential, so that the potential of the first end of the coil in the second time period reaches twice the first potential, and the potential of the second end of the coil is the potential of the grounding end, thereby making the coil of the relay realize voltage doubling power-on, improving the attraction speed, and further reducing the loss of the coil and improving the service life. BRIEF DESCRIPTION OF DRAWINGS

[0009] The technical solutions and other beneficial effects of the application will become apparent through the following detailed description of the specific embodiments of the application in conjunction with the accompanying drawings.

[0010] Figure 1 The circuit principle diagram of the driving circuit provided by the embodiment of the application.

[0011] Figure 2 The circuit principle diagram of the driving circuit provided by the embodiment of the application. Figure 1 The schematic diagram of the current flow direction of the driving circuit shown in FIG. 1 in the first time period.

[0012] Figure 3 The schematic diagram of the current flow direction of the driving circuit shown in FIG. 1 in the second time period. Figure 1

[0013] The schematic diagram of the current flow direction of the driving circuit shown in FIG. 1 in the third time period. Figure 4 Figure 1 The schematic diagram of the voltage change of the driving circuit shown in FIG. 1.

[0014] Figure 5 Figure 1 The structure schematic diagram of the inverter provided by the embodiment of the application.

[0015] Figure 6 The structure schematic diagram of the electronic device provided by the embodiment of the application.

[0016] Figure 7 The structure schematic diagram of the electronic device provided by the embodiment of the application. DETAILED DESCRIPTION

[0017] The technical solutions and other beneficial effects of the application will become apparent through the following detailed description of the specific embodiments of the application in conjunction with the accompanying drawings.

[0018] ​​Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0019] Please see Figures 1 to 5 This embodiment provides a driving circuit 100, such as Figures 1 to 4 As shown, the driving circuit 100 includes a capacitor module 10, a first potential control module 20, and a second potential control module 30. The first end of the capacitor module 10 is connected to the first end of the coil L1 of the relay RLY1. The first potential control module 20 is connected to the first end of the capacitor module 10, the first node E, the first control terminal RWR, and the first voltage terminal V1. The second potential control module 30 is connected to the second end of the coil L1, the first node E, the second end of the capacitor module 10, the ground terminal GND, and the second control terminal DRV. The second potential control module 30 is configured to control the first connection state between the ground terminal GND and the second end of the coil L1, and the second connection state between the first node E and the second end of the capacitor module 10, according to the signal of the second control terminal DRV.

[0020] In the first time period, both the first connection state and the second connection state are in the disconnected state, and the first potential control module 20 controls the potential of the first terminal of the capacitor module 10 to be the first potential; in the second time period, both the first connection state and the second connection state are in the on state, and the first potential control module 20 controls the potential of the second terminal of the capacitor module 10 to be equal to or approximately equal to the first potential.

[0021] It is understood that the driving circuit 100 provided in this embodiment, by having both the first connection state and the second connection state in the first time period in the off state, controls the potential of the first end of the capacitor module 10 to be the first potential by the first potential control module 20. In the second time period, both the first connection state and the second connection state in the on state, the first potential control module 20 controls the potential of the second end of the capacitor module 10 to be equal to or approximately equal to the first potential. This allows the potential of the first end of the coil L1 in the second time period to reach twice the first potential, and the potential of the second end of the coil L1 to be the potential of the ground terminal GND. This enables the coil L1 of the relay RLY1 to achieve voltage doubling, improves the pull-in speed, and thus reduces the loss of the coil L1 and improves its service life.

[0022] It should be noted that the first potential control module 20 is configured to output the first potential or the second potential according to the signal of the first control end RWR. The capacitance module 10 can be one first capacitance C1, or a series and / or parallel connection of a plurality of first capacitances C1.

[0023] In some embodiments, as shown in Figures 1 to 4 The first potential control module 20 includes a first control unit 21, a second control unit 22, and a channel selection unit 23. The control end of the first control unit 21 is connected with the first control end RWR, and the input end of the first control unit 21 is connected with the ground end GND. The control end of the second control unit 22 is connected with the output end of the first control unit 21, and the input end of the second control unit 22 is connected with the first voltage end V1. The input end of the channel selection unit 23 is connected with the output end of the second control unit 22, the first output end of the channel selection unit 23 is connected with the first end of the capacitance module 10, and the second output end of the channel selection unit 23 is connected with the first node E.

[0024] It should be noted that the signal of the first control end RWR can control whether the first control unit 21 is turned on, so as to control whether the potential of the control end of the second control unit 22 is the potential of the ground end GND. In the case that the potential of the control end of the second control unit 22 is the potential of the ground end GND, the second control unit 22 is turned on, so as to make the potential of the first voltage end V1 be transmitted to the channel selection unit 23. The channel selection unit 23 selects the output end of the second control unit 22 to be connected with the first end of the capacitance module 10 or the first node E according to the potential of the output end of the channel selection unit 23.

[0025] In some embodiments, as shown in Figures 1 to 4 The first control unit 21 includes a first resistor R1, a second resistor R2, and a first transistor Q1. The first end of the first resistor R1 is connected with the first control end RWR. The first end of the second resistor R2 is connected with the second end of the first resistor R1, and the second end of the second resistor R2 is connected with the ground end GND. The control electrode of the first transistor Q1 is connected with the second end of the first resistor R1 and the first end of the second resistor R2. The first pole of the first transistor Q1 is connected with the ground end GND, and the second pole of the first transistor Q1 is connected with the control end of the second control unit 22.

[0026] It should be noted that the first transistor Q1 is turned on in the case that the first control end RWR is high, and the first transistor Q1 is turned off in the case that the first control end RWR is low. The first transistor Q1 can be a BJT or a MOS tube. The first resistor R1 is optional.

[0027] In some embodiments, as shown in Figures 1 to 4As shown, the second control unit 22 comprises a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a second transistor Q2, a first end of the third resistor R3 is connected with the second electrode of the first transistor Q1; a first end of the fourth resistor R4 is connected with a second end of the third resistor R3; a first end of the fifth resistor R5 is connected with the first voltage end V1, and a second end of the fifth resistor R5 is connected with a second end of the fourth resistor R4; a control electrode of the second transistor Q2 is connected with the second end of the third resistor R3 and the first end of the fourth resistor R4, a first electrode of the second transistor Q2 is connected with the second end of the fourth resistor R4 and the second end of the fifth resistor R5, and a second electrode of the second transistor Q2 is connected with an input end of the channel selection unit 23.

[0028] It should be noted that the first transistor Q1 is turned on, and the second transistor Q2 is turned on; the first transistor Q1 is turned off, and the second transistor Q2 is turned off. The second transistor Q2 can be a BJT or a MOS transistor. The third resistor R3 is optional.

[0029] In some embodiments, as shown in FIG. 2, the first potential control module 20 further comprises a second control unit 22 and a channel selection unit 23. Figures 1 to 4 As shown, the channel selection unit 23 comprises a first diode D1 and a second diode D2, an anode of the first diode D1 is connected with the second electrode of the second transistor Q2, a cathode of the first diode D1 is connected with the first end of the capacitor module 10 and the first end of the coil L1; an anode of the second diode D2 is connected with the second electrode of the second transistor Q2, and a cathode of the second diode D2 is connected with the first node E.

[0030] It should be noted that the first diode D1 is turned on when the potential of the second node A is higher than the potential of the third node B. The second diode D2 is turned on when the potential of the second node A is higher than the potential of the first node E.

[0031] In some embodiments, as shown in FIG. 2, the first potential control module 20 further comprises a second control unit 22 and a channel selection unit 23. Figures 1 to 4 As shown, the first potential control module 20 further comprises a voltage maintaining unit 24, an input end of the voltage maintaining unit 24 is connected with the second voltage end V2, and an output end of the voltage maintaining unit 24 is connected with the input end of the channel selection unit 23 and the output end of the second control unit 22; wherein the potential of the second voltage end V2 is lower than the potential of the first voltage end V1.

[0032] It should be noted that the voltage maintaining unit 24 can reduce the potential of the third node B in the third period, so as to ensure that the potential of the third node B is lower when the relay RLY1 is attracted, thereby reducing the loss of the coil L1 when the relay RLY1 is attracted. The potential of the second voltage end V2 is a second potential.

[0033] In some embodiments, as shown in FIG. 2, the first potential control module 20 further comprises a second control unit 22 and a channel selection unit 23. Figures 1 to 4As shown, the voltage maintaining unit 24 comprises a third diode D3, an anode of the third diode D3 is connected with the second voltage terminal V2, and a cathode of the third diode D3 is connected with the input terminal of the channel selection unit 23 and the output terminal of the second control unit 22.

[0034] It needs to be explained that, in the case that the second transistor Q2 is off, since the relay RLY1 has been powered by the voltage doubler, the potential of the third node B has been decreased, at this time, the potential of the second voltage terminal V2 is higher than the potential of the third node B, thus the potential of the second voltage terminal V2 is transmitted to the third node B.

[0035] In some embodiments, as shown in FIG. 2, the second potential control module 30 comprises a third control unit 31 and a fourth control unit 32. Figures 1 to 4 As shown, the second potential control module 30 comprises a third control unit 31 and a fourth control unit 32, a control terminal of the third control unit 31 is connected with the second control terminal DRV, an input terminal of the third control unit 31 is connected with the ground terminal GND, and an output terminal of the third control unit 31 is connected with the second terminal of the coil L1; a control terminal of the fourth control unit 32 is connected with the output terminal of the third control unit 31 and the second terminal of the coil L1, an input terminal of the fourth control unit 32 is connected with the first node E, and an output terminal of the fourth control unit 32 is connected with the second terminal of the capacitor module 10.

[0036] It needs to be explained that, in the case that the second control terminal DRV is high level, the third control unit 31 is on, and the fourth control unit 32 is on; in the case that the second control terminal DRV is low level, the third control unit 31 is off, and the fourth control unit 32 is off.

[0037] In some embodiments, as shown in FIG. 2, the third control unit 31 comprises a sixth resistance R6, a seventh resistance R7 and a third transistor Q3. Figures 1 to 4 As shown, the third control unit 31 comprises a sixth resistance R6, a seventh resistance R7 and a third transistor Q3, a first terminal of the sixth resistance R6 is connected with the second control terminal DRV; a first terminal of the seventh resistance R7 is connected with a second terminal of the sixth resistance R6, and a second terminal of the seventh resistance R7 is connected with the ground terminal GND; a control electrode of the third transistor Q3 is connected with the second terminal of the sixth resistance R6 and the first terminal of the seventh resistance R7, a first electrode of the third transistor Q3 is connected with the ground terminal GND, and a second electrode of the third transistor Q3 is connected with the second terminal of the coil L1 and the control terminal of the fourth control unit 32.

[0038] It needs to be explained that, in the case that the second control terminal DRV is high level, the third transistor Q3 is on; in the case that the second control terminal DRV is low level, the third transistor Q3 is off. The third transistor Q3 can be a BJT or a MOS transistor. The sixth resistance R6 is optional.

[0039] In some embodiments, as shown in FIG. 2, the fourth control unit 32 comprises an eighth resistance R8, a ninth resistance R9 and a fourth transistor Q4. Figures 1 to 4As shown, the fourth control unit 32 includes an eighth resistor R8, a ninth resistor R9, a fourth transistor Q4, and a tenth resistor R10. The first end of the eighth resistor R8 is connected to the second pole of the third transistor Q3 and the second end of the coil L1. The first end of the ninth resistor R9 is connected to the second end of the eighth resistor R8, and the second end of the ninth resistor R9 is connected to the first node E. The control pole of the fourth transistor Q4 is connected to the second end of the eighth resistor R8 and the first end of the ninth resistor R9. The first pole of the fourth transistor Q4 is connected to the second end of the ninth resistor R9 and the first node E. The second pole of the fourth transistor Q4 is connected to the second end of the capacitor module 10. The first end of the tenth resistor R10 is connected to the second pole of the fourth transistor Q4 and the second end of the capacitor module 10. The second end of the tenth resistor R10 is connected to the ground terminal GND.

[0040] It should be noted that the third transistor Q3 is turned on, and the fourth transistor Q4 is turned on. When the third transistor Q3 is turned off, the fourth transistor Q4 is turned off. The fourth transistor Q4 can be a BJT or a MOS transistor. The eighth resistor R8 is optional. The tenth resistor R10 is optional.

[0041] In some embodiments, as shown in Figures 1 to 4 , the driving circuit 100 further includes a fourth diode D4 and a Zener diode Z1. The cathode of the fourth diode D4 is connected to the first end of the coil L1. The anode of the Zener diode Z1 is connected to the anode of the fourth diode D4. The cathode of the Zener diode Z1 is connected to the second end of the coil L1.

[0042] It should be noted that the fourth diode D4 and the Zener diode Z1 can clamp the voltage across the coil L1 to avoid overvoltage damage to the coil L1.

[0043] Please continue to refer to Figures 1 to 4 , the driving process of the relay RLY1 can include the following time periods:

[0044] First time period (charging phase): the first control terminal RWR is at a high level, and the first transistor Q1 and the second transistor Q2 are turned on. The second control terminal DRV is at a low level, and the third transistor Q3 and the fourth transistor Q4 are turned off. The current of the first voltage terminal V1 flows through the fifth resistor R5, the second transistor Q2, and the first diode D1 to the third node B. The current flows as shown by the arrows in Figures 1 to 4 .

[0045] As shown in Figures 1 to 4As shown, the potential of the third node B is VB, the first capacitor C1 is charged, the voltage difference between the third node B and the fourth node C (the voltage across the first capacitor C1) starts to increase, until it is charged to a potential close to the first voltage terminal V1. The voltage difference between the third node B and the fifth node D (the voltage across the coil L1) remains unchanged, i.e. VBD.

[0046] The second period (voltage doubling on phase): the first control end RWR is at a high level, the first transistor Q1 and the second transistor Q2 are both turned on; the second control end DRV is at a high level, the third transistor Q3 and the fourth transistor Q4 are both turned on. The current of the first voltage terminal V1 passes through the fifth resistor R5, the second transistor Q2 and the second diode D2 to reach the first node E, and the current flows as shown by the arrow in Figures 2 to 5 .

[0047] The voltage of the first node E is close to the potential of the first voltage terminal V1. Since the third transistor Q3 and the fourth transistor Q4 are both turned on, the voltage of the first node E reaches the fourth node C through the fourth transistor Q4, and the voltage of the ground terminal GND reaches the fifth node through the third transistor Q3. As shown in Figure 2 , due to the characteristic that the voltage across the capacitor cannot change abruptly, the voltage difference across the first capacitor C1 at this time is still the potential of the first voltage terminal V1 in the last period, i.e. the potential of the third node B is VB minus the potential of the fourth node C is VC, which is equal to the potential of the first voltage terminal V1. Therefore, the potential of the third node B is VB, which is equal to the sum of the potential of the fourth node C and the potential of the first voltage terminal V1. Since the voltage of the fourth node C is close to the potential of the first voltage terminal V1, VB and VBC are both double the potential of the first voltage terminal V1. The voltage across the coil L1, i.e. VBD, is double the potential of the first voltage terminal V1, thus achieving the effect of voltage doubling on of the relay RLY1.

[0048] The third period (voltage reduction after steady state of the relay RLY1): the first control end RWR is at a low level, the first transistor Q1 and the second transistor Q2 are both turned off; the second control end DRV is at a high level, the third transistor Q3 and the fourth transistor Q4 are both turned on. The potential of the second voltage terminal V2 reaches the third node B through the third diode D3 and the first diode D1, and the current flows as shown by the arrow in Figure 5 .

[0049] As shown in Figure 3As shown, the potential of VB decreases to the potential of the second voltage terminal V2, and the potential of the fifth node D is still the voltage of the ground terminal GND. At this time, the voltage across the coil L1 of the relay RLY1, i.e., VBD, decreases to the potential of the second voltage terminal V2 minus the potential of the ground terminal GND. Since the potential of the second voltage terminal V2 is less than the potential of the first voltage terminal V1, the coil L1 loss when the relay RLY1 is turned on can be greatly reduced.

[0050] In some embodiments, as shown in FIG. 2, the present embodiments provide an electronic device 300 comprising the driving circuit 100 or the inverter 200. Figure 5 As shown, the present embodiments provide an inverter 200 comprising the driving circuit 100 described above. The first switch K1 of the relay RLY1 is used to control the transmission of electric energy in the inverter 200.

[0051] It can be understood that, since the inverter 200 provided by the present embodiments comprises the driving circuit 100 described above, the first connection state and the second connection state are both in the open state in the first time period, the first potential control module 20 controls the potential of the first end of the capacitor module 10 to be the first potential, the first connection state and the second connection state are both in the conductive state in the second time period, and the first potential control module 20 controls the potential of the second end of the capacitor module 10 to be equal to or approximately equal to the first potential. In this way, the potential of the first end of the coil L1 can reach twice the first potential in the second time period, and the potential of the second end of the coil L1 is the potential of the ground terminal GND, so that the coil L1 of the relay RLY1 realizes voltage doubling and power-on, the attraction speed is improved, the loss of the coil L1 is reduced, and the service life is also improved.

[0052] In some embodiments, as shown in FIG. 2, the present embodiments provide an electronic device 300 comprising the driving circuit 100 or the inverter 200. Figure 4 Figure 5 Figure 6 Figure 7 As shown, the present embodiments provide an electronic device 300 comprising the driving circuit 100 or the inverter 200 described above.

[0053] It can be understood that, since the electronic device 300 provided by the present embodiments comprises the driving circuit 100 or the inverter 200 described above, the first connection state and the second connection state are both in the open state in the first time period, the first potential control module 20 controls the potential of the first end of the capacitor module 10 to be the first potential, the first connection state and the second connection state are both in the conductive state in the second time period, and the first potential control module 20 controls the potential of the second end of the capacitor module 10 to be equal to or approximately equal to the first potential. In this way, the potential of the first end of the coil L1 can reach twice the first potential in the second time period, and the potential of the second end of the coil L1 is the potential of the ground terminal GND, so that the coil L1 of the relay RLY1 realizes voltage doubling and power-on, the attraction speed is improved, the loss of the coil L1 is reduced, and the service life is also improved.

[0054] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0055] The driving circuit 100, the inverter 200 and the electronic device 300 provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples in this paper, and the above embodiment description is only used to help understand the technical solutions and core ideas of the present application; those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drive circuit characterized by comprising: The driving circuit comprises: a capacitor module, a first end of the capacitor module being connected with a first end of a coil of a relay; a first potential control module, the first potential control module being connected with the first end of the capacitor module, a first node, a first control end and a first voltage end; a second potential control module, the second potential control module being connected with a second end of the coil, the first node, a second end of the capacitor module, a ground end and a second control end, the second potential control module being configured to control a first connection state between the ground end and the second end of the coil and a second connection state between the first node and the second end of the capacitor module according to a signal of the second control end; wherein in a first time period, the first connection state and the second connection state are both in an open state, and the first potential control module controls a potential of the first end of the capacitor module to be a first potential; in a second time period, the first connection state and the second connection state are both in a closed state, and the first potential control module controls a potential of the second end of the capacitor module to be equal to or approximately equal to the first potential.

2. The drive circuit according to claim 1, characterized in that, The first potential control module comprises: a first control unit, a control end of the first control unit being connected with the first control end, and an input end of the first control unit being connected with the ground end; a second control unit, a control end of the second control unit being connected with an output end of the first control unit, and an input end of the second control unit being connected with the first voltage end; a channel selection unit, an input end of the channel selection unit being connected with an output end of the second control unit, a first output end of the channel selection unit being connected with the first end of the capacitor module, and a second output end of the channel selection unit being connected with the first node.

3. The drive circuit according to claim 2, characterized in that, The first control unit comprises: a first resistor, a first end of the first resistor being connected with the first control end; a second resistor, a first end of the second resistor being connected with a second end of the first resistor, and a second end of the second resistor being connected with the ground end; a first transistor, a control electrode of the first transistor being connected with the second end of the first resistor and a first end of the second resistor, a first electrode of the first transistor being connected with the ground end, and a second electrode of the first transistor being connected with the control end of the second control unit.

4. The drive circuit according to claim 3, characterized in that, The second control unit comprises: a third resistor, a first end of the third resistor being connected with the second electrode of the first transistor; a fourth resistor, a first end of the fourth resistor being connected with a second end of the third resistor; a fifth resistor, a first end of the fifth resistor being connected with the first voltage end, and a second end of the fifth resistor being connected with a second end of the fourth resistor; a second transistor, a control electrode of the second transistor being connected with the second end of the third resistor and the first end of the fourth resistor, a first electrode of the second transistor being connected with the second end of the fourth resistor and the second end of the fifth resistor, and a second electrode of the second transistor being connected with the input end of the channel selection unit.

5. The drive circuit according to claim 4, characterized in that, The channel selection unit comprises: a first diode, an anode of the first diode being connected with the second electrode of the second transistor, a cathode of the first diode being connected with the first end of the capacitor module and the first end of the coil; a second diode, an anode of the second diode being connected with the second electrode of the second transistor, a cathode of the second diode being connected with the first node.

6. The drive circuit according to any one of claims 2 to 5, characterized by The first potential control module further comprises a voltage maintaining unit, an input end of the voltage maintaining unit being connected with the second voltage end, and an output end of the voltage maintaining unit being connected with the input end of the channel selection unit and the output end of the second control unit. The potential of the second voltage end is lower than the potential of the first voltage end.

7. The drive circuit according to claim 6, characterized in that, The voltage maintaining unit comprises a third diode, an anode of the third diode being connected with the second voltage end, and a cathode of the third diode being connected with the input end of the channel selection unit and the output end of the second control unit.

8. The drive circuit of claim 1, wherein, The second potential control module comprises: a third control unit, a control end of the third control unit being connected with the second control end, an input end of the third control unit being connected with the ground end, and an output end of the third control unit being connected with the second end of the coil; a fourth control unit, a control end of the fourth control unit being connected with the output end of the third control unit and the second end of the coil, an input end of the fourth control unit being connected with the first node, and an output end of the fourth control unit being connected with the second end of the capacitor module.

9. The drive circuit according to claim 8, characterized in that, The third control unit comprises: a sixth resistor, a first end of the sixth resistor being connected with the second control end; a seventh resistor, a first end of the seventh resistor being connected with a second end of the sixth resistor, and a second end of the seventh resistor being connected with the ground end; a third transistor, a control electrode of the third transistor being connected with the second end of the sixth resistor and the first end of the seventh resistor, a first electrode of the third transistor being connected with the ground end, and a second electrode of the third transistor being connected with the second end of the coil and the control end of the fourth control unit.

10. The drive circuit according to claim 9, characterized in that, The fourth control unit comprises: an eighth resistor, a first end of the eighth resistor being connected with the second electrode of the third transistor and the second end of the coil; a ninth resistor, a first end of the ninth resistor being connected with a second end of the eighth resistor, and a second end of the ninth resistor being connected with the first node; a fourth transistor, a control electrode of the fourth transistor being connected with the second end of the eighth resistor and the first end of the ninth resistor, a first electrode of the fourth transistor being connected with the second end of the ninth resistor and the first node, and a second electrode of the fourth transistor being connected with the second end of the capacitor module; a tenth resistor, a first end of the tenth resistor being connected with the second electrode of the fourth transistor and the second end of the capacitor module, and a second end of the tenth resistor being connected with the ground end.

11. The drive circuit according to any one of claims 1 to 5, characterized by The driving circuit further comprises: a fourth diode, a cathode of the fourth diode being connected with the first end of the coil; a Zener diode, an anode of the Zener diode being connected with an anode of the fourth diode, a cathode of the Zener diode being connected with the second end of the coil.

12. An inverter, characterized by comprising: The inverter comprises the drive circuit according to any one of claims 1-11.

13. An electronic device, comprising: The electronic device comprises the drive circuit according to any one of claims 1-11; or the electronic device comprises the inverter according to claim 12.

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