Dual-voltage inverter
By designing a dual-voltage inverter circuit consisting of inductors, transistors, and filter capacitors, the problems of complex structure and heavy weight of generator dual-voltage inverters are solved, achieving circuit simplification and cost reduction.
Patent Information
- Application Number
- CN202520145642.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing dual-voltage inverters for generators have complex motor structures and electronic circuits, resulting in high costs, large size, and heavy weight.
A dual-voltage inverter circuit, consisting of inductors, transistors, filter capacitors, voltage regulators, and thyristors, is adopted. Two AC power inputs are realized through a rectifier bridge and a power amplifier circuit, forming 120V and 240V voltage outputs, simplifying the circuit structure.
This reduces the structural complexity and weight of the inverter, lowers costs, and simplifies the circuitry while achieving efficient power distribution.
Smart Images
Figure CN223859060U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of generator inverter technology, and in particular to a dual-voltage inverter. Background Technology
[0002] Existing dual-voltage inverters for generators are mainly sold in the Americas, and their power supply consists of two 120V inverters and one 240V inverter. Current inverter generators require two 120V inverters connected in parallel or series to achieve both 120V and 240V outputs.
[0003] However, existing dual-voltage inverters for generators have complex motor structures and electronic circuits, resulting in high costs, large size, and heavy weight. Utility Model Content
[0004] The purpose of this invention is to provide a dual-voltage inverter that solves the problems of complex motor structure and electronic circuits, high cost, large size and heavy weight of existing generator dual-voltage inverters.
[0005] To achieve the above objectives, this utility model provides a dual-voltage inverter, including a power plug, a permanent magnet motor, a rectifier bridge, a protection circuit, a filter and voltage regulator circuit, and a power amplifier circuit. The rectifier bridge includes inductor L1, inductor L2, transistor Q1, transistor Q2, transistor Q3, and transistor Q4. Inductor L1 is connected to the live wire of the power plug, and inductor L2 is connected to the neutral wire of the power plug. One end of transistor Q1 and one end of transistor Q2 are respectively connected to inductor L1, one end of transistor Q3 and one end of transistor Q4 are respectively connected to inductor L2, the other end of transistor Q1 is connected to the other end of transistor Q3, and the other end of transistor Q2 is connected to the other end of transistor Q4. The protection circuit is connected to the power plug, the filter and voltage regulator circuit is connected to transistors Q1 and Q3, and the power amplifier circuit is connected to the filter and voltage regulator circuit.
[0006] The protection circuit includes a current sampling resistor R1 and a current sampling resistor R2. One end of the current sampling resistor R1 is connected to the power plug, one end of the current sampling resistor R2 is connected to the transistor Q2 and the transistor Q3 respectively, and the other end of the current sampling resistor R2 is grounded.
[0007] The filtering and voltage regulation circuit includes a filter capacitor C1, a filter capacitor C2, a voltage regulator R3, and a voltage regulator R4. The filter capacitors C1 and C2 are connected in parallel and are respectively connected to the transistor Q1 and the transistor Q3. One end of the voltage regulator R3 is connected to the filter capacitor C1, and the other end of the voltage regulator R3 is grounded. One end of the voltage regulator R4 is connected to the filter capacitor C2, and the other end of the voltage regulator R4 is grounded.
[0008] The power amplifier circuit includes thyristors R5, R6, and R7, which are connected in parallel. One end of each thyristor is connected to the filter capacitor C1 and the filter capacitor C2, respectively, and the other end of each thyristor is connected to the permanent magnet motor.
[0009] The power amplifier circuit further includes diodes D1, D2, and D3, which are connected in parallel. One end of each diode is connected to voltage regulators R3 and R4, the other end of diode D1 is connected to the thyristor R5, the other end of diode D2 is connected to the thyristor R6, and the other end of diode D3 is connected to the thyristor R7.
[0010] This invention relates to a dual-voltage inverter. Inductors L1 and L2 exhibit high resistance to AC points, providing an impediment effect and facilitating the distribution and use of electrical energy. Transistors Q1, Q2, Q3, and Q4 are all Insulated Gate Bipolar Transistors (IGBTs), a fully controllable voltage-driven power semiconductor device. In operation, the circuit supports two AC power inputs: AC110V and AC220V. After rectification by the rectifier bridge, the inverter outputs a 240V power supply. The generator's neutral line becomes the power supply's neutral line, cleverly forming two 120V phase voltages and one 240V line voltage. This significantly reduces the complexity of the inverter structure and its circuitry, solving the problems of complex motor structure and electronic circuitry, high cost, large size, and heavy weight inherent in existing dual-voltage inverters. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0012] Figure 1 This is a circuit diagram of a dual-voltage inverter according to the first embodiment of this utility model.
[0013] In the diagram: 101 - power plug, 102 - permanent magnet motor. Detailed Implementation
[0014] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0015] The first embodiment of this application is as follows:
[0016] Please see Figure 1 , Figure 1 This is a circuit diagram of a dual-voltage inverter according to the first embodiment of this utility model. This utility model provides a dual-voltage inverter, including a power plug 101, a permanent magnet motor 102, a rectifier bridge, a protection circuit, a filter and voltage regulator circuit, and a power amplifier circuit. The rectifier bridge includes inductors L1 and L2, transistors Q1, Q2, Q3, and Q4. The protection circuit includes current sampling resistors R1 and R2. The filter and voltage regulator circuit includes filter capacitors C1 and C2, voltage regulators R3 and R4. The power amplifier circuit includes thyristors R5, R6, and R7, diodes D1, D2, and D3. The aforementioned solution solves the problems of complex motor structure and electronic circuitry, high cost, large size, and heavy weight in existing generator dual-voltage inverters.
[0017] In this specific embodiment, inductor L1 is connected to the live wire of power plug 101, inductor L2 is connected to the neutral wire of power plug 101, one end of transistor Q1 and one end of transistor Q2 are respectively connected to inductor L1, one end of transistor Q3 and one end of transistor Q4 are respectively connected to inductor L2, the other end of transistor Q1 is connected to the other end of transistor Q3, the other end of transistor Q2 is connected to the other end of transistor Q4, the protection circuit is connected to power plug 101, the filter and voltage regulator circuit is connected to transistor Q1 and transistor Q3, and the power amplifier circuit is connected to the filter and voltage regulator circuit. Furthermore, inductors L1 and L2 exhibit high resistance to AC points, providing an impediment effect and facilitating the distribution and use of electrical energy. Transistors Q1, Q2, Q3, and Q4 are all Insulated Gate Bipolar Transistors (IGBTs), a fully controllable voltage-driven power semiconductor device. In use, this circuit supports two AC power inputs: AC110V and AC220V. After rectification by the rectifier bridge, the inverter outputs a 240V power supply. The generator's neutral line becomes the power supply's neutral line, cleverly forming two 120V phase voltages and one 240V line voltage, greatly reducing the complexity of the inverter structure and its circuitry.
[0018] One end of the current sampling resistor R1 is connected to the power plug 101, one end of the current sampling resistor R2 is connected to the transistor Q2 and the transistor Q3 respectively, and the other end of the current sampling resistor R2 is grounded. The current sampling resistors R1 and R2 are current limiting resistors to prevent the circuit current from being too large and damaging the subsequent circuit components.
[0019] Secondly, the filter capacitors C1 and C2 are connected in parallel and are respectively connected to transistors Q1 and Q3. One end of the voltage regulator R3 is connected to the filter capacitor C1, and the other end of the voltage regulator R3 is grounded. One end of the voltage regulator R4 is connected to the filter capacitor C2, and the other end of the voltage regulator R4 is grounded. The filter capacitors C1 and C2 are used to smooth the DC power after rectification by the rectifier bridge to reduce voltage fluctuations. The Zener diodes R3 and R4 are used to stabilize the output voltage and provide overvoltage protection.
[0020] Furthermore, the thyristors R5, R6, and R7 are connected in parallel, with one end of each thyristor connected to the filter capacitor C1 and the filter capacitor C2, respectively, and the other end of each thyristor connected to the permanent magnet motor 102. The thyristors R5, R6, and R7 form a push-pull power amplifier to drive the permanent magnet motor 102.
[0021] Finally, diodes D1, D2, and D3 are connected in parallel. One end of each diode is connected to voltage regulators R3 and R4, the other end of diode D1 is connected to the thyristor R5, the other end of diode D2 is connected to the thyristor R6, and the other end of diode D3 is connected to the thyristor R7. Diodes D1 and D2 are used to control the forward and directional rotation of the permanent magnet motor 102, respectively, and diode D3 provides additional power support when needed.
[0022] Using the dual-voltage inverter of this embodiment, the inductors L1 and L2 exhibit high resistance to AC points, providing an impediment effect and facilitating the distribution and use of electrical energy. Transistors Q1, Q2, Q3, and Q4 are all Insulated Gate Bipolar Transistors (IGBTs), a fully controllable voltage-driven power semiconductor device. In use, the circuit supports two AC power inputs: AC110V and AC220V. After rectification by the rectifier bridge, the inverter outputs a 240V power supply. The generator's neutral line becomes the power supply's neutral line, cleverly forming two 120V phase voltages and one 240V line voltage. This significantly reduces the complexity of the inverter structure and its circuitry, solving the problems of complex motor structure and electronic circuitry, high cost, large size, and heavy weight in existing dual-voltage inverters.
[0023] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.
Claims
1. A dual-voltage inverter comprising a power plug and a permanent magnet motor, characterized in that, It further comprises a rectifier bridge, a protection circuit, a filter and voltage stabilizing circuit and a power amplification circuit; The rectifier bridge comprises an inductor L1, an inductor L2, a transistor Q1, a transistor Q2, a transistor Q3 and a transistor Q4, one end of the inductor L1 is connected with the live wire of the power plug, one end of the inductor L2 is connected with the neutral wire of the power plug, one end of the transistor Q1 and one end of the transistor Q2 are respectively connected with the inductor L1, one end of the transistor Q3 and one end of the transistor Q4 are respectively connected with the inductor L2, the other end of the transistor Q1 and the other end of the transistor Q3 are connected, the other end of the transistor Q2 and the other end of the transistor Q4 are connected, the protection circuit is connected with the power plug, the filter and voltage stabilizing circuit is connected with the transistor Q1 and the transistor Q3, the power amplification circuit is connected with the filter and voltage stabilizing circuit.
2. The dual-voltage inverter of claim 1, characterized in that, The protection circuit comprises a current sampling resistor R1 and a current sampling resistor R2, one end of the current sampling resistor R1 is connected with the power plug, one end of the current sampling resistor R2 is respectively connected with the transistor Q2 and the transistor Q3, the other end of the current sampling resistor R2 is grounded.
3. The dual-voltage inverter of claim 1, characterized in that, The filter and voltage stabilizing circuit comprises a filter capacitor C1, a filter capacitor C2, a voltage stabilizer R3 and a voltage stabilizer R4, the filter capacitor C1 and the filter capacitor C2 are connected in parallel with each other and are respectively connected with the transistor Q1 and the transistor Q3, one end of the voltage stabilizer R3 is connected with the filter capacitor C1, the other end of the voltage stabilizer R3 is grounded, one end of the voltage stabilizer R4 is connected with the filter capacitor C2, the other end of the voltage stabilizer R4 is grounded.
4. The dual-voltage inverter of claim 3, characterized in that, The power amplification circuit comprises a thyristor R5, a thyristor R6 and a thyristor R7, the thyristor R5, the thyristor R6 and the thyristor R7 are respectively connected in parallel, one end of the thyristor R5, the thyristor R6 and the thyristor R7 is respectively connected with the filter capacitor C1 and the filter capacitor C2, the other end of the thyristor R5, the thyristor R6 and the thyristor R7 is respectively connected with the permanent magnet motor.
5. The dual-voltage inverter of claim 4, characterized in that, The power amplification circuit further comprises a diode D1, a diode D2 and a diode D3, the diode D1, the diode D2 and the diode D3 are respectively connected in parallel, one end of the diode D1, the diode D2 and the diode D3 is connected with the voltage stabilizer R3 and the voltage stabilizer R4, the other end of the diode D1 is connected with the thyristor R5, the other end of the diode D2 is connected with the thyristor R6, the other end of the diode D3 is connected with the thyristor R7.