Inverter fan speed regulation system

Abstract

The utility model relates to the technical field of heat dissipation of power equipment, and discloses an inverter fan speed regulation system, which comprises a battery, a fan, a fan, a fan and a fan, the inverter is used for converting the direct current into alternating current and outputting the alternating current to a load; the inverter fans are arranged in the inverter and are used for reducing the internal temperature of the inverter; the temperature acquisition module is arranged in the inverter and is used for monitoring the working temperature of the inverter; the power output acquisition module is mounted in the inverter and is used for monitoring power output of a load end of the inverter; an MCU is installed in the inverter and used for controlling the rotating speed of a fan of the inverter through a speed regulation circuit, the MCU outputs PWM signals to regulate starting and the rotating speed of the fan, and the rotating speed of the fan can be regulated in real time according to the temperature and on-load power of the radiator through the speed regulation mode; the effect of dynamically adjusting the rotating speed of the fan according to the actual working state is achieved.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for power equipment, and in particular to an inverter fan speed control system. Background Technology

[0002] When an inverter is carrying a high-power load, the power devices generate a lot of heat due to the high power output. In addition to basic heat dissipation through heat sinks, fans are also needed to create an effective internal airflow for active cooling, ensuring stable operation of the inverter.

[0003] However, existing technologies have several problems with fan control. First, current fans are typically battery-powered, and their speed is affected by the battery voltage after startup. When the battery voltage is low, the current at the battery terminals increases, causing the MOSFETs in the DC boost circuit to overheat. However, the fan speed remains low due to the low battery voltage, failing to provide effective heat dissipation and thus affecting the cooling effect.

[0004] Secondly, when the inverter is carrying a medium-power load, the fan will stop working after an initial rapid cooling process. Subsequently, when the temperature rises again, the fan will restart. This frequent start-stop cycle not only leads to unstable cooling performance but also increases the workload of the equipment and reduces system efficiency.

[0005] Finally, when the inverter is carrying a high-power load, the fan cannot start immediately. It usually needs to wait for the NTC temperature sensor to detect that the temperature has reached the set value before starting the fan. This causes a delay in fan response, making it unable to cope with the temperature rise caused by the load in time, and increasing the risk of inverter overheating. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides an inverter fan speed control system, which aims to improve the problems of slow response and severe limitations in the existing technology when dissipating heat inside the inverter.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an inverter fan speed control system, comprising:

[0008] Batteries are used to provide power to the inverter;

[0009] An inverter is used to convert direct current (DC) to alternating current (AC) and output it to a load.

[0010] Inverter fans, which are provided in multiple sets, are installed inside the inverter to reduce the internal temperature of the inverter;

[0011] The temperature acquisition module is installed inside the inverter and is used to monitor the inverter's operating temperature.

[0012] The power output acquisition module is installed inside the inverter and is used to monitor the power output at the inverter load end.

[0013] The inverter is equipped with an MCU, which is used to control the speed of the inverter fan through a speed control circuit.

[0014] Through the above technical solution: when the temperature is high or the load is heavy, the fan can start quickly and gradually increase its speed to effectively enhance the heat dissipation capacity; when the temperature decreases or the load decreases, the fan speed decreases accordingly to avoid energy waste and extend the fan's life.

[0015] As a further description of the above technical solution:

[0016] Preferably, the inverter further includes an inverter boost circuit, which has multiple ports, one of which is connected to the load and the other is connected to the power output acquisition module.

[0017] The above technical solution is used to transmit the boosted AC power to external devices and to monitor the actual output power in real time.

[0018] As a further description of the above technical solution:

[0019] Preferably, the battery is connected to the load via an inverter boost circuit.

[0020] The above technical solution involves boosting the DC power supplied by the battery through the inverter's boost circuit before outputting it to the load, thus realizing the inverter's function.

[0021] As a further description of the above technical solution:

[0022] Preferably, the MCU is connected to the inverter fan via a line and is used to supply power to the inverter fan.

[0023] The above technical solution connects the inverter fan to the circuit, enabling not only control of the fan's operating status but also direct power supply to the fan.

[0024] As a further description of the above technical solution:

[0025] Preferably, the MCU is electrically connected to the temperature acquisition module and is used to receive the signal detected by the temperature acquisition module.

[0026] The above technical solution enables the MCU to dynamically sense the operating temperature of the device and determine whether the fan needs to be started or the fan speed adjusted accordingly.

[0027] As a further description of the above technical solution:

[0028] Preferably, the MCU is electrically connected to the power output acquisition module and is used to monitor the inverter output power.

[0029] The above technical solution enables the MCU to determine the current operating status of the system based on load changes and to comprehensively adjust the fan's operating mode in conjunction with temperature information.

[0030] As a further description of the above technical solution:

[0031] Preferably, the MCU adjusts the inverter fan speed by generating a PWM signal.

[0032] Through the above technical solution, based on the data obtained from the temperature acquisition module and the power output acquisition module, the MCU can dynamically adjust the duty cycle of the PWM signal, thereby controlling the voltage supply to the fan and thus adjusting the fan speed.

[0033] As a further description of the above technical solution:

[0034] Preferably, the PWM signal is transmitted to the inverter fan through the fan power supply circuit.

[0035] The above technical solution works as follows: after receiving the PWM signal, the power supply circuit adjusts the output voltage according to the duty cycle of the signal, thereby controlling the running speed of the fan.

[0036] This utility model has the following beneficial effects:

[0037] 1. In this utility model, the start-up and speed of the fan are adjusted by the PWM signal output by the MCU. This speed adjustment method enables the fan to adjust its speed in real time according to the temperature of the heat sink and the load power, thus achieving the effect of dynamically adjusting the fan speed according to the actual working state.

[0038] 2. In this utility model, by adopting a technical solution that directly powers the fan without using batteries, a separate power supply circuit is provided for the fan, thus avoiding the impact of battery voltage fluctuations on the fan speed. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the system architecture of an inverter fan speed control system proposed in this utility model;

[0040] Figure 2 This is a circuit diagram of an inverter fan speed control system proposed in this utility model. Detailed Implementation

[0041] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0042] Reference Figure 1 One embodiment of this utility model is an inverter fan speed control system, comprising:

[0043] The battery provides power to the inverter; the inverter converts DC to AC and outputs it to the load; multiple inverter fans are installed inside the inverter to reduce its internal temperature; a temperature acquisition module is installed inside the inverter to monitor its operating temperature; and a power output acquisition module is installed inside the inverter to monitor the power output at the load end.

[0044] The inverter has an internal MCU, which is used to control the speed of the inverter fan through a speed control circuit.

[0045] Specifically, the battery, as the main power source of the system, is responsible for providing DC power to the inverter. The inverter converts the DC power to AC power based on the power provided by the battery and outputs it to the load. In traditional solutions, the inverter fan is directly powered by the battery, which makes the inverter fan speed affected by the battery voltage. When the battery voltage is low, the current increases, but the inverter fan speed is insufficient, resulting in poor heat dissipation.

[0046] The inverter is equipped with multiple fans to reduce its operating temperature. The fan speed can be adjusted according to the actual operating conditions of the inverter. Unlike traditional solutions that control the fan solely based on temperature, this system uses a PWM signal output from the MCU to determine the inverter fan speed based on both the heatsink temperature and the load power. In this way, the inverter fan can increase its speed to accelerate heat dissipation under heavy load and decrease its speed under low load, avoiding unnecessary energy consumption and improving heat dissipation efficiency. This dynamic adjustment function of the inverter fan ensures that the inverter can quickly dissipate heat under high load and high temperature, while reducing unnecessary power consumption under low temperature and low load.

[0047] The temperature acquisition module and the power output acquisition module are responsible for monitoring the inverter's temperature and load power, respectively. The temperature acquisition module monitors the inverter's temperature changes in real time and feeds the data back to the MCU. Based on this data, the MCU determines whether the fan speed needs to be adjusted. When the inverter temperature reaches a preset threshold, the MCU adjusts the fan speed through a PWM signal to achieve more efficient heat dissipation. The power output acquisition module monitors the inverter's output power and transmits the data to the MCU in real time. By combining power data and temperature data, the MCU can make more accurate adjustment decisions, ensuring that the fan maintains optimal heat dissipation under any load conditions.

[0048] This dual temperature and power control method effectively avoids the heat dissipation instability caused by the intermittent operation of traditional fans; especially under heavy loads, the fan can start in time, avoiding the delay problem of waiting for the NTC to detect the temperature rise before starting the fan.

[0049] Reference Figure 1 The inverter also includes an inverter boost circuit, which has multiple ports, one of which is connected to the load and the other is connected to the power output acquisition module.

[0050] Specifically, the boost circuit has multiple ports, one of which is connected to the load and another is connected to the power output acquisition module. The boost circuit uses these ports to increase the voltage and regulate the power. The core components of the boost circuit include inductors, diodes, switching transistors (such as MOSFETs), and control circuits. Through the synergistic effect of these components, the boost circuit can dynamically adjust the output voltage according to the inverter's operating conditions to meet the power requirements of the load.

[0051] The working principle of the boost circuit is based on pulse width modulation (PWM) technology. Specifically, the switching transistor switches periodically. When the switching transistor is turned on, current flows through the inductor and electrical energy is stored. When the switching transistor is turned off, the inductor releases the stored energy, which is then turned on by the diode to form the output voltage. By controlling the switching frequency and duty cycle of the switching transistor, the boost circuit can adjust the amplitude of the output voltage to ensure that it can always meet the load requirements when the load changes.

[0052] The power output acquisition module monitors the power output at the load end in real time using current and voltage sensors and transmits the acquired data to the MCU (Microcontroller Unit). Based on the feedback data from the power output acquisition module, the MCU adjusts the operating state of the boost circuit in real time. Specifically, when the load power changes, the power output acquisition module transmits the change signal to the MCU. The MCU calculates the required output voltage based on these signals and adjusts the PWM signal in the boost circuit, thereby controlling the output voltage and power of the boost circuit. Through this feedback mechanism, the system can adjust the boost circuit according to the real-time load, ensuring that the output voltage remains within a stable range to meet load requirements.

[0053] Reference Figure 1 The battery is connected to the load through the inverter boost circuit;

[0054] Specifically, the battery is connected to the load through the inverter boost circuit, forming a stable power supply system; the battery is the main power source of the inverter, providing DC power to the entire system; the function of the inverter boost circuit is to boost the low-voltage DC power provided by the battery to a high-voltage output that meets the load requirements.

[0055] Reference Figure 1 The MCU is connected to the inverter fan via a line and is used to supply power to the inverter fan;

[0056] Specifically, by controlling the fan power supply, the system ensures that the fan can still work stably even when the battery voltage fluctuates. This design avoids the problem in traditional technology where insufficient battery voltage prevents the fan from reaching the predetermined speed, thereby improving the system's stability and heat dissipation efficiency.

[0057] Reference Figure 1 The MCU is electrically connected to the temperature acquisition module and is used to receive the signal detected by the temperature acquisition module.

[0058] Specifically, the MCU (microcontroller unit) and the temperature acquisition module are electrically connected to achieve data transmission. The MCU receives the temperature signal detected by the temperature acquisition module, monitors the inverter's operating temperature in real time, and makes control decisions on fan speed adjustment accordingly.

[0059] The core component of the temperature acquisition module is a temperature sensor, such as an NTC thermistor or a digital temperature sensor. The temperature sensor can accurately measure the operating temperature of the inverter and convert the detected temperature information into a corresponding electrical signal. This signal is transmitted to the MCU through the circuit. After receiving the signal, the MCU processes and analyzes the data to determine whether the fan speed needs to be adjusted or the fan needs to be started.

[0060] Reference Figure 1The MCU is electrically connected to the power output acquisition module and is used to monitor the inverter output power.

[0061] Specifically, the power output acquisition module includes current and voltage sensors. These sensors measure the current and voltage at the inverter output and convert them into corresponding power data through appropriate conversion circuits. The power output data is transmitted to the MCU via analog or digital signals. Analog signals can be read through analog input terminals and converted into digital signals through an analog-to-digital converter (ADC). Digital signals are then transmitted directly to the MCU via communication protocols such as I2C and SPI.

[0062] Specifically, when the MCU receives power data, it compares it with a preset power threshold. If the output power exceeds the preset range, the MCU can adjust the inverter's operating state based on the data analysis. For example, under heavy load, the MCU can increase power output and ensure stable inverter operation by adjusting the fan speed or the operating mode of the boost circuit. Conversely, under light load, the MCU will appropriately reduce power output to reduce energy consumption and thus improve the system's energy efficiency.

[0063] Reference Figure 1 The MCU generates a PWM signal to adjust the inverter fan speed; the PWM signal is transmitted to the inverter fan through the fan power supply circuit.

[0064] Specifically, the PWM signal is a periodic square wave signal whose duty cycle determines the fan speed. The MCU analyzes the inverter's operating status based on real-time data provided by the temperature acquisition module and the power output acquisition module, and then generates an appropriate PWM signal to adjust the fan speed through the fan control circuit.

[0065] Reference Figure 2 Based on the same concept described above, this utility model provides an embodiment of a circuit applied to an inverter fan speed control system, which operates as follows:

[0066] First, the voltage provided by the battery is converted into a stable 14V voltage through the power supply circuit to power the fan speed control circuit. This power supply circuit ensures that the fan speed control circuit can work stably regardless of changes in battery voltage, avoiding the impact of battery voltage fluctuations on the fan.

[0067] The MCU is the core control component of the system, responsible for dynamically adjusting the inverter fan speed based on the inverter's temperature and load power. By reading data from the temperature acquisition module and the power output acquisition module, it monitors the inverter's operating status in real time. When the inverter temperature is too high or the load power is too large, the MCU will output a 50% PWM signal to start the inverter fan and achieve initial heat dissipation. As the temperature rises or the load increases, the MCU will gradually increase the duty cycle of the PWM signal to provide a higher voltage to the inverter fan, thereby adjusting the inverter fan speed and ensuring that the internal temperature of the inverter is controlled within a safe range.

[0068] In this circuit, MOSFET Q2 is a key component in the fan speed control circuit. Q2 is a P-channel MOSFET. When the MCU outputs a high-level signal, transistor Q4 turns on, the gate voltage of MOSFET Q2 is pulled low, MOSFET Q2 turns on, and inductor L1 stores energy. When the MCU outputs a low-level signal, transistor Q4 does not turn on, and transistor Q3 quickly pulls up the gate voltage of MOSFET Q2, causing MOSFET Q2 to turn off, and inductor L1 releases the stored energy. Through this control method, MOSFET Q2 realizes the switching control of current, and adjusts the fan voltage through the BUCK circuit principle, thereby controlling the fan speed.

[0069] The BUCK circuit adopts the PWM regulation principle. By adjusting the duty cycle of the PWM signal, it precisely controls the voltage output of the fan, thereby regulating the fan speed. The BUCK circuit can smoothly adjust the voltage according to the changes in load power and temperature, avoiding the problem of unstable fan operation caused by excessive or low voltage in traditional inverter fan control.

[0070] When the inverter operates at a very high temperature, the MCU will output a continuous high-level signal to keep the MOSFET Q2 on for a long time, ensuring that the fan runs at a high speed for heat dissipation.

[0071] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An inverter fan speed control system, characterized in that, include: Batteries are used to provide power to the inverter; An inverter is used to convert direct current (DC) to alternating current (AC) and output it to a load. Inverter fans, which are provided in multiple sets, are installed inside the inverter to reduce the internal temperature of the inverter; The temperature acquisition module is installed inside the inverter and is used to monitor the inverter's operating temperature. The power output acquisition module is installed inside the inverter and is used to monitor the power output at the inverter load end. The inverter is equipped with an MCU, which is used to control the speed of the inverter fan through a speed control circuit.

2. The inverter fan speed control system according to claim 1, characterized in that: The inverter also includes an inverter boost circuit, which has multiple ports, one of which is connected to the load and the other is connected to the power output acquisition module.

3. The inverter fan speed control system according to claim 1, characterized in that: The battery is connected to the load via an inverter boost circuit.

4. The inverter fan speed control system according to claim 1, characterized in that: The MCU is connected to the inverter fan via a line and is used to supply power to the inverter fan.

5. The inverter fan speed control system according to claim 1, characterized in that: The MCU is electrically connected to the temperature acquisition module and is used to receive the signal detected by the temperature acquisition module.

6. The inverter fan speed control system according to claim 1, characterized in that: The MCU is electrically connected to the power output acquisition module and is used to monitor the inverter's output power.

7. The inverter fan speed control system according to claim 1, characterized in that: The MCU adjusts the inverter fan speed by generating a PWM signal.

8. The inverter fan speed control system according to claim 7, characterized in that: The PWM signal is transmitted to the inverter fan through the fan power supply circuit.

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