Inverter

Abstract

The utility model, which relates to the technical field of the power supply, discloses an inverter comprising a rectifier used for receiving an input power supply; the input end of the voltage stabilizing module is connected with the output end of the rectifier; the first output end of the voltage stabilizing module is connected with the feedback end of the control module, the second output end of the voltage stabilizing module is connected with the input end of the first switch and the input end of the second switch, and the input end of the third switch and the input end of the fourth switch are connected with the negative electrode output end of the rectifier; the control module is respectively connected with the control ends of the first switch, the second switch, the third switch and the fourth switch, the first switch is connected with the output end of the third switch, and the second switch is connected with the output end of the fourth switch. According to the invention, the voltage stabilization module is adopted at the direct current end before inversion of the inverter, so that the direct current end is prevented from fluctuating due to fluctuation of the power supply voltage, and the problem of unstable inversion voltage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to an inverter. Background Art

[0002] An inverter is a converter that converts DC power into constant frequency and voltage or variable frequency and voltage AC power.

[0003] In existing inverters, voltage instability may occur in the inverter circuit. Some instabilities may be caused by voltage fluctuations at the power supply end. The power supply voltage fluctuations will cause the voltage of the rectified DC power to fluctuate, thereby affecting the voltage of the inverted AC power. Utility Model Content

[0004] The utility model aims to provide an inverter, in which a voltage stabilizing module is used at the DC power end before the inverter is inverted to prevent the DC power end from fluctuating due to the fluctuation of the power supply voltage, thereby solving the problem of unstable inverter voltage.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] One aspect of an embodiment of the utility model provides an inverter, which includes: a rectifier, the rectifier is used to receive an input power supply; a voltage stabilizing module, the input end of the voltage stabilizing module is connected to the output end of the rectifier; a control module, a first switch, a second switch, a third switch and a fourth switch, the first output end of the voltage stabilizing module is connected to the feedback end of the control module, the second output end of the voltage stabilizing module is connected to the input end of the first switch and the input end of the second switch, the input end of the third switch and the input end of the fourth switch are connected to the negative output end of the rectifier, the control module is respectively connected to the control end of the first switch, the control end of the second switch, the control end of the third switch and the control end of the fourth switch, the output end of the first switch is connected to the output end of the third switch, and the output end of the second switch is connected to the output end of the fourth switch.

[0007] In some embodiments, the voltage stabilizing module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a first triode, a second triode and a first voltage stabilizing diode, one end of the first resistor and the collector of the first triode are connected to the positive output end of the rectifier, the other end of the first resistor is connected to the base of the first triode and the collector of the second triode, the emitter of the first triode is connected to the base of the second triode, one end of the third resistor, the negative electrode of the first voltage stabilizing diode, one end of the fourth resistor and one end of the fifth resistor through the second resistor, the other end of the fifth resistor is connected to one end of the first capacitor and the feedback end of the control module, the emitter of the first triode is connected to the input end of the first switch and the input end of the second switch, the other end of the third resistor, the positive electrode of the first voltage stabilizing diode, the other end of the fourth resistor and the other end of the first capacitor are connected to the negative output end of the rectifier.

[0008] In some embodiments, the voltage stabilizing module also includes a second voltage stabilizing diode and a sixth resistor, the cathode of the second voltage stabilizing diode is connected to the cathode of the first voltage stabilizing diode, the anode of the second voltage stabilizing diode is connected to the anode of the first voltage stabilizing diode, and the sixth resistor is connected in parallel with the second voltage stabilizing diode.

[0009] In some embodiments, the first switch, the second switch, the third switch and the fourth switch are all NMOS transistors.

[0010] In some embodiments, the inverter also includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an eleventh resistor, one end of the seventh resistor is connected to the second output end of the voltage stabilizing module, the other end of the seventh resistor is connected to the input end of the first switch and the input end of the second switch, the two ends of the eighth resistor are respectively connected to the control end of the second switch and the negative output end of the rectifier, the two ends of the ninth resistor are respectively connected to the control end of the first switch and the negative output end of the rectifier, the two ends of the tenth resistor are respectively connected to the control end of the fourth switch and the negative output end of the rectifier, and the two ends of the eleventh resistor are respectively connected to the control end of the third switch and the negative output end of the rectifier.

[0011] In some embodiments, the inverter also includes an inductor, one end of the inductor is connected to the output end of the first switch and the output end of the third switch, or one end of the inductor is connected to the output end of the second switch and the output end of the fourth switch, and the other end of the inductor serves as an inverter output electrode.

[0012] In some embodiments, the inverter further includes a second capacitor and a third capacitor, the capacity of the second capacitor is smaller than the capacity of the third capacitor, and the second capacitor and the third capacitor are connected in parallel to the output end of the rectifier.

[0013] In some embodiments, the rectifier is a rectifier bridge.

[0014] An inverter according to an embodiment of the utility model has at least the following beneficial effects: a voltage stabilizing module is used at the DC power end before the inverter is inverted to prevent the DC power end from fluctuating due to the fluctuation of the power supply voltage, thereby solving the problem of unstable inverter voltage. The voltage stabilizing module is connected to the control module. When the voltage is too high or too low, the control module can detect it in advance through the voltage stabilizing module, and then perform corresponding step-up or step-down operations on the first switch, the second switch, the third switch and the fourth switch, so that the voltage after inversion is stable within the ideal voltage range, thereby achieving the effect of voltage stabilization.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of an inverter circuit according to some embodiments of the present application. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0022] The technical solution of the embodiment of the present application is briefly described below:

[0023] According to some embodiments, Figure 1 As shown, the present application provides an inverter, the inverter comprising:

[0024] A rectifier, the rectifier is used to receive input power;

[0025] A voltage stabilizing module, wherein an input end of the voltage stabilizing module is connected to an output end of the rectifier;

[0026] A control module, a first switch, a second switch, a third switch and a fourth switch, the first output end of the voltage stabilizing module is connected to the feedback end of the control module, the second output end of the voltage stabilizing module is connected to the input end of the first switch and the input end of the second switch, the input end of the third switch and the input end of the fourth switch are connected to the negative output end of the rectifier, the control module is respectively connected to the control end of the first switch, the control end of the second switch, the control end of the third switch and the control end of the fourth switch, the output end of the first switch is connected to the output end of the third switch, and the output end of the second switch is connected to the output end of the fourth switch.

[0027] Based on the working principle of the above embodiment, the input end of the rectifier can receive an AC power supply or a DC power supply, and after being rectified by the rectifier, the output end of the rectifier outputs a DC power supply, and the voltage stabilizing module performs voltage stabilization on the DC power supply, and then the first output end of the voltage stabilizing module is output to the feedback end of the control module, and the second output end of the voltage stabilizing module is output to the input end of the first switch and the input end of the second switch. Among them, the voltage stabilizing module can play a role in voltage stabilization.

[0028] Furthermore, the control module is connected to the control end of the first switch, the control end of the second switch, the control end of the third switch, and the control end of the fourth switch, respectively. When the power supply voltage is too high and the voltage stabilizing module cannot stabilize the voltage, the control module can detect the voltage fluctuation in advance through the voltage stabilizing module, and then perform a corresponding voltage reduction operation on the first switch, the fourth switch or the second switch, the third switch; when the power supply voltage is too low and the voltage stabilizing module cannot stabilize the voltage, the control module can detect the voltage fluctuation in advance through the voltage stabilizing module, and then perform a corresponding voltage increase operation on the first switch, the fourth switch or the second switch, the third switch.

[0029] When the first switch and the fourth switch cooperate to output a positive half cycle, the second switch and the third switch are turned off; when the second switch and the third switch cooperate to output a negative half cycle, the first switch and the fourth switch are turned off.

[0030] When the power supply voltage is too high or too low and the voltage stabilizing module cannot stabilize the voltage, the control module can detect the voltage fluctuation in advance through the voltage stabilizing module, and then perform corresponding step-up or step-down operations on the first switch, the second switch, the third switch and the fourth switch, so that the inverted voltage is stabilized within the ideal voltage range, thereby achieving the effect of voltage stabilization.

[0031] In some embodiments, Figure 1 As shown, the rectifier adopts a rectifier bridge DB.

[0032] The following is combined with the appendix of this manual Figure 1 , the preferred implementation modes of the present disclosure are further elaborated in detail.

[0033] According to some embodiments, Figure 1 As shown, the voltage stabilizing module includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a first transistor Q11, a second transistor Q12 and a first voltage stabilizing diode DZ1, one end of the first resistor R1 and the collector of the first transistor Q11 are connected to the positive output end of the rectifier, the other end of the first resistor R1 is connected to the base of the first transistor Q11 and the collector of the second transistor Q12, and the emitter of the first transistor Q11 is connected to the second transistor Q12 through the second resistor R2. The base of the transistor Q12, one end of the third resistor R3, the negative electrode of the first voltage-stabilizing diode DZ1, one end of the fourth resistor R4 and one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to one end of the first capacitor C1 and the feedback end of the control module, the emitter of the first transistor Q11 is connected to the input end of the first switch and the input end of the second switch, the other end of the third resistor R3, the positive electrode of the first voltage-stabilizing diode DZ1, the other end of the fourth resistor R4 and the other end of the first capacitor C1 are connected to the negative output end of the rectifier.

[0034] Based on the working principle of the above embodiment, when the rectifier output voltage is too high, the base voltage of the first triode Q11 increases, the first triode Q11 increases the output, the base voltage of the second triode Q12 increases, and the second triode Q12 increases the output. When the second triode Q12 increases the output, the base voltage of the first triode Q11 decreases, and the voltage is stabilized by the first voltage stabilizing diode DZ1, so the output of the first triode Q11 is stabilized.

[0035] Furthermore, in some embodiments, Figure 1 As shown, in addition to the above structure, the voltage stabilizing module may also include a second voltage stabilizing diode DZ2 and a sixth resistor R6, wherein the cathode of the second voltage stabilizing diode DZ2 is connected to the cathode of the first voltage stabilizing diode DZ1, the anode of the second voltage stabilizing diode DZ2 is connected to the anode of the first voltage stabilizing diode DZ1, and the sixth resistor R6 is connected in parallel with the second voltage stabilizing diode DZ2, so as to achieve better voltage stabilization.

[0036] According to some embodiments, Figure 1 As shown, the first switch, the second switch, the third switch and the fourth switch all use NMOS tubes.

[0037] Further, such as Figure 1 As shown, the inverter also includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10 and an eleventh resistor R11, one end of the seventh resistor R7 is connected to the second output end of the voltage stabilizing module, the other end of the seventh resistor R7 is connected to the input end of the first switch and the input end of the second switch, the two ends of the eighth resistor R8 are respectively connected to the control end of the second switch and the negative output end of the rectifier, the two ends of the ninth resistor R9 are respectively connected to the control end of the first switch and the negative output end of the rectifier, the two ends of the tenth resistor R10 are respectively connected to the control end of the fourth switch and the negative output end of the rectifier, and the two ends of the eleventh resistor R11 are respectively connected to the control end of the third switch and the negative output end of the rectifier.

[0038] Specifically, Figure 1 As shown, the emitter of the first triode Q11 is connected to the drain of the first NMOS tube Q21 and the drain of the second NMOS tube Q22 through the seventh resistor R7, the source of the third NMOS tube Q23 and the source of the fourth NMOS tube Q24 are connected to the negative output end of the rectifier bridge DB, the control module is respectively connected to the gate of the first NMOS tube Q21, the gate of the second NMOS tube Q22, the gate of the third NMOS tube Q23 and the gate of the fourth NMOS tube Q24, the source of the first NMOS tube Q21 is connected to the drain of the third switch, and the source of the second NMOS tube Q22 is connected to the drain of the fourth switch.

[0039] According to some embodiments, Figure 1As shown, the inverter further includes an inductor L, one end of the inductor L is connected to the output end of the first switch and the output end of the third switch, or one end of the inductor L is connected to the output end of the second switch and the output end of the fourth switch, and the other end of the inductor L serves as an inverter output electrode. The inductor L is used for filtering.

[0040] According to some embodiments, Figure 1 As shown, the inverter further includes a second capacitor C2 and a third capacitor C3, the capacity of the second capacitor C2 is smaller than that of the third capacitor C3, and the second capacitor C2 and the third capacitor C3 are connected in parallel to the output end of the rectifier. Among them, a large capacitance ratio has a low frequency, and a small capacitance ratio has a high frequency.

[0041] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0042] Although the present disclosure has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present disclosure can be implemented in a variety of forms without departing from the spirit or essence of the present application, it should be understood that the above-mentioned embodiments are not limited to any of the foregoing details, but should be widely interpreted within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An inverter, characterized in that: The inverter comprises: A rectifier, the rectifier is used to receive an input power source; A voltage stabilizing module, wherein an input end of the voltage stabilizing module is connected to an output end of the rectifier; A control module, a first switch, a second switch, a third switch and a fourth switch, wherein the first output end of the voltage stabilizing module is connected to the feedback end of the control module, the second output end of the voltage stabilizing module is connected to the input end of the first switch and the input end of the second switch, the input end of the third switch and the input end of the fourth switch are connected to the negative output end of the rectifier, the control module is respectively connected to the control end of the first switch, the control end of the second switch, the control end of the third switch and the control end of the fourth switch, the output end of the first switch is connected to the output end of the third switch, and the output end of the second switch is connected to the output end of the fourth switch.

2. The inverter according to claim 1, characterized in that: The voltage stabilizing module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a first triode, a second triode and a first voltage stabilizing diode. One end of the first resistor and the collector of the first triode are connected to the positive output end of the rectifier. The other end of the first resistor is connected to the base of the first triode and the collector of the second triode. The emitter of the first triode is connected to the base of the second triode, one end of the third resistor, the negative electrode of the first voltage stabilizing diode, one end of the fourth resistor and one end of the fifth resistor through the second resistor. The other end of the fifth resistor is connected to one end of the first capacitor and the feedback end of the control module. The emitter of the first triode is connected to the input end of the first switch and the input end of the second switch. The other end of the third resistor, the positive electrode of the first voltage stabilizing diode, the other end of the fourth resistor and the other end of the first capacitor are connected to the negative output end of the rectifier.

3. The inverter according to claim 2, characterized in that: The voltage stabilizing module also includes a second voltage stabilizing diode and a sixth resistor, the cathode of the second voltage stabilizing diode is connected to the cathode of the first voltage stabilizing diode, the anode of the second voltage stabilizing diode is connected to the anode of the first voltage stabilizing diode, and the sixth resistor is connected in parallel with the second voltage stabilizing diode.

4. The inverter according to claim 1, characterized in that: The first switch, the second switch, the third switch and the fourth switch are all NMOS tubes.

5. The inverter according to claim 1, characterized in that: The inverter also includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an eleventh resistor, one end of the seventh resistor is connected to the second output end of the voltage stabilizing module, the other end of the seventh resistor is connected to the input end of the first switch and the input end of the second switch, two ends of the eighth resistor are respectively connected to the control end of the second switch and the negative output end of the rectifier, two ends of the ninth resistor are respectively connected to the control end of the first switch and the negative output end of the rectifier, two ends of the tenth resistor are respectively connected to the control end of the fourth switch and the negative output end of the rectifier, and two ends of the eleventh resistor are respectively connected to the control end of the third switch and the negative output end of the rectifier.

6. The inverter according to claim 1, characterized in that: The inverter also includes an inductor, one end of which is connected to the output end of the first switch and the output end of the third switch, or one end of which is connected to the output end of the second switch and the output end of the fourth switch, and the other end of the inductor serves as an inverter output electrode.

7. The inverter according to claim 1, characterized in that: The inverter further includes a second capacitor and a third capacitor, the capacity of the second capacitor is smaller than the capacity of the third capacitor, and the second capacitor and the third capacitor are connected in parallel to the output end of the rectifier.

8. The inverter according to claim 1, characterized in that: The rectifier adopts a rectifier bridge.

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