Power supply voltage conversion circuit and wind power generator

Abstract

The utility model provides a kind of power supply voltage conversion circuit and wind driven generator, the circuit includes: power factor compensation network, rectifier bridge stack, filter network, charging module, energy storage battery, electric energy output module and control unit;The input end of power factor compensation network is connected motor input end, the output end of power factor compensation network is connected the input end of rectifier bridge stack, the output end of rectifier bridge stack is connected the input end of filter network, the output end of filter network is connected the input end of charging module, the output end of charging module and the input end of electric energy output module are connected energy storage battery, charging module, electric energy output module are also connected with control unit;The utility model can let generator continuously collect wind energy, store in battery, when needing, again high-power output, different voltage and current can be output due to different load, realize the purpose of high safety, high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power generation equipment technology, and in particular to a power supply voltage conversion circuit and a wind turbine generator. Background Technology

[0002] New energy sources are the driving force for the development of the energy market now and in the future, and wind energy is one of the inexhaustible renewable energy sources.

[0003] Existing wind turbines are all bladed rotary generators, which have a high risk factor, require a large area, and affect the migration of birds. The Karman vortex street wind turbine is a new type of generator that utilizes the Karman vortex street effect to resonate with the wind and convert wind energy into electrical energy. It has advantages such as being bladeless, posing no danger, requiring less space, and being easy to maintain.

[0004] Existing Karman vortex street generators mostly output a single voltage without an energy storage battery pack, or with a small-capacity energy storage battery. Since they output a single voltage source, the output power cannot exceed the generator's power. Utility Model Content

[0005] The main purpose of this invention is to provide a power supply voltage conversion circuit and a wind turbine generator. It aims to use standard integrated circuits to carefully combine them into a complete system to complete the overall function of the Karman vortex street wind turbine generator. It allows the generator to continuously collect wind energy and store it in the battery. When needed, it can output high power and output different voltages and currents according to different loads, so as to achieve the purpose of high safety and high efficiency.

[0006] To achieve the above objectives, this utility model proposes a power supply voltage conversion circuit, which includes: a power factor compensation network, a rectifier bridge, a filter network, a charging module, an energy storage battery, an energy output module, and a control unit;

[0007] The input terminal of the power factor compensation network is connected to the motor input terminal, the output terminal of the power factor compensation network is connected to the input terminal of the rectifier bridge, the output terminal of the rectifier bridge is connected to the input terminal of the filter network, the output terminal of the filter network is connected to the input terminal of the charging module, the output terminal of the charging module and the input terminal of the power output module are connected to the energy storage battery, and the charging module and the power output module are also connected to the control unit.

[0008] The AC voltage output by the generator is converted into DC voltage after passing through the power factor compensation network, rectifier bridge, and filter network. Then, it is converted into the voltage required by the energy storage battery by the charging module to charge the energy storage battery and store the energy output by the generator in the energy storage battery. The power output module converts the power in the energy storage battery into the voltage required by the load and outputs it.

[0009] A further technical solution of this utility model is that the power factor compensation network includes capacitors C20, C21, and C14, and the filtering network includes capacitors C23 and C24. The capacitive network composed of capacitors C20, C21, and C14 is connected in parallel at the generator input terminal to change the generator's power angle. One end of capacitor C14 is connected to one end of capacitor C20 and pin 1 of the rectifier bridge. One end of capacitor C21 is connected to the other end of capacitor C20 and pin 2 of the rectifier bridge. Pin 3 of the rectifier bridge is connected to one end of capacitor C23, one end of capacitor C24, and pin 1 of the charging module. The other ends of capacitors C23 and C24 are grounded.

[0010] A further technical solution of this utility model is that the charging module and the power output module adopt the same buck-boost circuit.

[0011] A further technical solution of this utility model is that the buck-boost circuit includes an integrated circuit U1, capacitors C11, C12, C15, C16, C17, and C18, resistors R1, R2, R3, and R4, an inductor L2, and MOSFETs Q1, Q2, Q3, and Q4. One end of capacitor C11 is connected to one end of capacitor C12, one end of capacitor C13, one end of capacitor C18, pin 3 of integrated circuit U1, and the drain of MOSFET Q1. The other ends of capacitors C11, C12, C13, and C18 are grounded. The gate of MOSFET Q1 is connected to pin 1 of integrated circuit U1, the gate of MOSFET Q3 is connected to pin 2 of integrated circuit U1, and the source of MOSFET Q3 is grounded. The source of MOSFET Q1 is connected to the drain of MOSFET Q3 and one end of inductor L2. The other end of inductor L2 is connected to the source of MOSFET Q3 and the drain of MOSFET Q4. The drain of MOSFET Q2 is connected to one end of capacitors C15, C16, and C17, one end of resistor R1, and one end of resistor R2. The other ends of capacitors C15, C16, and C17 are grounded. The gate of MOSFET Q2 is connected to pin 4 of integrated circuit U1. The gate of MOSFET Q4 is connected to pin 5 of integrated circuit U1. The other end of resistor R1 is connected to one end of resistor R3, and the other end of resistor R3 is grounded. The other end of resistor R2 is connected to one end of resistor R4 and pin 6 of integrated circuit U1, and the other end of resistor R4 is grounded.

[0012] A further technical solution of this utility model is that the control unit adopts a 32-bit ARM microcomputer of the STM32F series.

[0013] To achieve the above objectives, this utility model also proposes a wind turbine generator, which includes the power supply voltage conversion circuit described above.

[0014] The beneficial effects of this utility model's power supply voltage conversion circuit are:

[0015] This utility model, through the above-mentioned technical solution, uses standard integrated circuits to carefully combine into a complete system to complete the overall function of the Karman vortex street wind turbine generator. It enables the generator to continuously collect wind energy and store it in the battery. When needed, it can output high power and output different voltages and currents according to different loads, thus achieving the goal of high safety and high efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the circuit structure of a preferred embodiment of the power supply voltage conversion circuit of this utility model;

[0017] Figure 2 This is a schematic diagram of the circuit structure of a step-up / step-down circuit;

[0018] Figure 3 This is a schematic diagram of the control unit.

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] This invention proposes a power supply voltage conversion circuit applicable to wind turbine generators. The technical solution employed primarily utilizes standard integrated circuits, carefully assembled into a complete system to fulfill the overall function of a Karman vortex street wind turbine generator. This invention incorporates a large-capacity energy storage battery pack, enabling the generator to continuously collect wind energy and store it in the battery, then outputting it at high power when needed. Furthermore, this invention includes an output voltage negotiation function, allowing for different voltage and current outputs depending on the load, achieving high safety and high efficiency.

[0022] Specifically, such as Figure 1 As shown, a preferred embodiment of the power supply voltage conversion circuit of this utility model includes: a power factor compensation network, a rectifier bridge, a filter network, a charging module, an energy storage battery, an energy output module, and a control unit.

[0023] The input terminal of the power factor compensation network is connected to the motor input terminal, the output terminal of the power factor compensation network is connected to the input terminal of the rectifier bridge, the output terminal of the rectifier bridge is connected to the input terminal of the filter network, the output terminal of the filter network is connected to the input terminal of the charging module, the output terminal of the charging module and the input terminal of the power output module are connected to the energy storage battery, and the charging module and the power output module are also connected to the control unit.

[0024] The AC voltage output from the generator is converted into DC voltage after passing through the power factor compensation network, rectifier bridge, and filter network. This DC voltage is then converted to the voltage required by the energy storage battery by the charging module, charging the battery and storing the energy output from the generator. The power output module converts the energy from the energy storage battery into the voltage required by the load before outputting it. The output power is connected to the corresponding electric vehicle's charger via a standard three-pin power cable. The MCU in the control circuit generates corresponding control signals based on the input signals from various sensors, ensuring the system operates safely and efficiently.

[0025] like Figure 1 As shown, in this embodiment, the power factor compensation network includes capacitors C20, C21, and C14, and the filtering network includes capacitors C23 and C24. The capacitive network composed of capacitors C20, C21, and C14 is connected in parallel at the generator input terminal to change the generator's power angle.

[0026] One end of capacitor C14 is connected to one end of capacitor C20 and pin 1 of the rectifier bridge. One end of capacitor C21 is connected to the other end of capacitor C20 and pin 2 of the rectifier bridge. Pin 3 of the rectifier bridge is connected to one end of capacitor C23, one end of capacitor C24 and pin 1 of the charging module. The other ends of capacitor C23 and capacitor C24 are grounded.

[0027] In this embodiment, the charging module and the power output module use the same buck-boost circuit.

[0028] Specifically, such as Figure 2As shown, the buck-boost circuit includes integrated circuit U1, capacitors C11, C12, C15, C16, C17, and C18, resistors R1, R2, R3, and R4, inductor L2, and MOSFETs Q1, Q2, Q3, and Q4. One end of capacitor C11 is connected to one end of capacitor C12, one end of capacitor C13, one end of capacitor C18, pin 3 of integrated circuit U1, and the drain of MOSFET Q1. The other ends of capacitors C11, C12, C13, and C18 are grounded. The gate of MOSFET Q1 is connected to pin 1 of integrated circuit U1, the gate of MOSFET Q3 is connected to pin 2 of integrated circuit U1, and the source of MOSFET Q3 is grounded. The source of transistor Q1 is connected to the drain of MOSFET Q3 and one end of inductor L2. The other end of inductor L2 is connected to the source of MOSFET Q3 and the drain of MOSFET Q4. The drain of MOSFET Q2 is connected to one end of capacitors C15, C16, and C17, one end of resistor R1, and one end of resistor R2. The other ends of capacitors C15, C16, and C17 are grounded. The gate of MOSFET Q2 is connected to pin 4 of integrated circuit U1. The gate of MOSFET Q4 is connected to pin 5 of integrated circuit U1. The other end of resistor R1 is connected to one end of resistor R3, and the other end of resistor R3 is grounded. The other end of resistor R2 is connected to one end of resistor R4 and pin 6 of integrated circuit U1, and the other end of resistor R4 is grounded.

[0029] When the input voltage exceeds the required output voltage, the integrated circuit U1 operates in buck regulator mode. MOSFET Q2 is normally open, and MOSFET Q4 is normally closed. The alternating switching of MOSFETs Q1 and Q3 induces current oscillation in the inductor L2, efficiently completing the buck conversion. The output voltage is then divided by resistors R2 and R4 and fed back to the FB terminal of integrated circuit U1, forming a closed loop that controls the switching speed of MOSFETs Q1 and Q3, achieving regulated output.

[0030] When the input voltage is lower than the required output voltage, integrated circuit U1 operates in boost regulation mode. MOSFET Q1 is normally open, and MOSFET Q3 is normally closed. The alternating switching of MOSFETs Q2 and Q4 induces current oscillation in inductor L2, efficiently completing the boost conversion. The output voltage is then divided by resistors R2 and R4 and fed back to the FB terminal of integrated circuit U1, forming a closed loop that controls the switching speed of MOSFETs Q1 and Q3, achieving regulated output.

[0031] Capacitors C11, C12, C13, C15, C16, and C17 form a filter circuit. Resistors R1 and R3 divide the voltage and send it to the control unit for sampling, enabling secondary voltage monitoring.

[0032] In this embodiment, the control unit adopts the following... Figure 3 The STM32F series 32-bit ARM microcomputer shown has advantages such as stable performance.

[0033] The control logic and implementation of this control unit are as follows:

[0034] 1. Use an ADC to measure the generator output voltage, generator output current, energy storage battery pack voltage, output port voltage, and output port current;

[0035] 2. Communicates with various sensors via an external bus to read corresponding parameters;

[0036] 3. Use the external port of the microcomputer to input the corresponding logic signals to control each functional module accordingly.

[0037] The working principle of the power supply voltage conversion circuit of this utility model will be further explained below.

[0038] This invention employs a capacitor power factor compensation network, a rectifier bridge, and a filter network to rectify the AC voltage output from the generator into DC. A charging module charges the energy storage battery, ensuring its safety and enabling energy storage from the generator. An energy output module then converts the voltage to the voltage required by the load, outputting the energy.

[0039] The control unit monitors the generator's physical state in real time: wind speed, wind direction, and vibration frequency, and adjusts the generator casing's inherent resonance point in a timely manner to maximize the oscillation and utilize wind energy most efficiently.

[0040] The control unit measures the generator's output voltage and current in real time, adjusts the charging current parameters, and efficiently stores the electrical energy generated by the generator into the energy storage battery pack. When the energy storage battery is fully charged, the generator's input power is promptly shut off to protect the battery pack.

[0041] The control unit continuously monitors whether a load is connected, negotiates the output voltage and current with the load, and outputs power, while also monitoring the output current and voltage in real time to ensure normal output. When the energy storage battery is completely discharged, the control unit will promptly shut off the output current to protect the battery pack. When the load is automatically removed, the control unit will promptly shut off the output current to avoid energy waste.

[0042] The control unit will send the measured current and voltage parameters to the LCD screen in real time for reference.

[0043] The beneficial effects of this utility model's power supply voltage conversion circuit are:

[0044] This utility model, through the above-mentioned technical solution, uses standard integrated circuits to carefully combine into a complete system to complete the overall function of the Karman vortex street wind turbine generator. It enables the generator to continuously collect wind energy and store it in the battery. When needed, it can output high power and output different voltages and currents according to different loads, thus achieving the goal of high safety and high efficiency.

[0045] To achieve the above objectives, this utility model also proposes a wind turbine generator, which includes the power supply voltage conversion circuit described above. The circuit structure and working principle of the power supply voltage conversion circuit have been described in detail above and will not be repeated here.

[0046] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural changes made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A power supply voltage conversion circuit, characterized in that, The circuit includes: a power factor compensation network, a rectifier bridge, a filter network, a charging module, an energy storage battery, an energy output module, and a control unit; The input terminal of the power factor compensation network is connected to the motor input terminal, the output terminal of the power factor compensation network is connected to the input terminal of the rectifier bridge, the output terminal of the rectifier bridge is connected to the input terminal of the filter network, the output terminal of the filter network is connected to the input terminal of the charging module, the output terminal of the charging module and the input terminal of the power output module are connected to the energy storage battery, and the charging module and the power output module are also connected to the control unit. The AC voltage output by the generator is converted into DC voltage after passing through the power factor compensation network, rectifier bridge, and filter network. Then, it is converted into the voltage required by the energy storage battery by the charging module to charge the energy storage battery and store the energy output by the generator in the energy storage battery. The power output module converts the power in the energy storage battery into the voltage required by the load and outputs it. The power factor compensation network includes capacitors C20, C21, and C14, and the filtering network includes capacitors C23 and C24. The capacitive network composed of capacitors C20, C21, and C14 is connected in parallel at the generator input terminal to change the generator's power angle. One end of capacitor C14 is connected to one end of capacitor C20 and pin 1 of the rectifier bridge. One end of capacitor C21 is connected to the other end of capacitor C20 and pin 2 of the rectifier bridge. Pin 3 of the rectifier bridge is connected to one end of capacitor C23, one end of capacitor C24, and pin 1 of the charging module. The other ends of capacitors C23 and C24 are grounded.

2. The power supply voltage conversion circuit according to claim 1, characterized in that, The charging module and the power output module use the same buck-boost circuit.

3. The power supply voltage conversion circuit according to claim 2, characterized in that, The buck-boost circuit includes an integrated circuit U1, capacitors C11, C12, C15, C16, C17, and C18, resistors R1, R2, R3, and R4, an inductor L2, and MOSFETs Q1, Q2, Q3, and Q4. One end of capacitor C11 is connected to one end of capacitor C12, one end of capacitor C13, one end of capacitor C18, pin VIN of integrated circuit U1, and the drain of MOSFET Q1. The other ends of capacitors C11, C12, C13, and C18 are grounded. The gate of MOSFET Q1 is connected to pin HO1 of integrated circuit U1, the gate of MOSFET Q3 is connected to pin LO1 of integrated circuit U1, and the source of MOSFET Q3 is grounded. The source of transistor Q1 is connected to the drain of transistor Q3 and one end of inductor L2. The other end of inductor L2 is connected to the source of transistor Q3 and the drain of transistor Q4. The drain of transistor Q2 is connected to one end of capacitors C15, C16, and C17, one end of resistor R1, and one end of resistor R2. The other ends of capacitors C15, C16, and C17 are grounded. The gate of transistor Q2 is connected to pin LO2 of integrated circuit U1. The gate of transistor Q4 is connected to pin 5 of integrated circuit U1. The other end of resistor R1 is connected to one end of resistor R3, and the other end of resistor R3 is grounded. The other end of resistor R2 is connected to one end of resistor R4 and pin 6 of integrated circuit U1, and the other end of resistor R4 is grounded.

4. The power supply voltage conversion circuit according to any one of claims 1 to 3, characterized in that, The control unit uses a 32-bit ARM microcomputer from the STM32F series.

5. A wind turbine generator, characterized in that, The wind turbine includes a power supply voltage conversion circuit as described in any one of claims 1 to 4.

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