Fan speed regulation circuit device, speed regulation fan and energy storage equipment

Abstract

The embodiment of the utility model discloses a fan speed regulation circuit device, a speed regulation fan and energy storage equipment, and belongs to the technical field of motor control. The fan speed regulation circuit device comprises an optocoupler isolation assembly, the optocoupler isolation assembly comprises a photoelectric coupler and a first capacitor, the first end of the first capacitor is grounded, and the second end of the first capacitor is connected with the power supply end of the photoelectric coupler; the control circuit comprises a control chip and a first triode, the base electrode of the first triode is connected with the control chip, the collector electrode of the first triode is connected with the cathode of the photoelectric coupler, and the emitter electrode of the first triode is grounded; the push-pull circuit comprises a second triode, a third triode and a third capacitor; a plurality of speed regulation circuits, wherein each speed regulation circuit comprises a current-limiting resistor; and the current limiting assembly is connected with the anode of the photoelectric coupler.

Description

Technical Field

[0001] This application belongs to the field of motor control technology, specifically relating to a fan speed regulation circuit device, a speed-regulating fan, and an energy storage device. Background Technology

[0002] Currently, most fans regulate fan speed by changing the duty cycle of a Pulse Width Modulation (PWM) signal. The PWM signal is amplified by a driver circuit to obtain sufficient drive current, thereby driving the fan's rotation. The duty cycle of the PWM signal determines the fan motor's speed; a larger duty cycle results in a higher fan motor speed, while a smaller duty cycle leads to a lower speed. In the process of cooling energy storage devices using fans, a Central Processing Unit (CPU) controls the duty cycle of the PWM signal corresponding to the input side of the optocoupler isolation to change the duty cycle of the optocoupler isolation's output side. One optocoupler controls only one fan. If multiple fans need to be controlled by a single PWM signal, additional optocouplers and CPU control pins are required, significantly increasing manufacturing costs. Utility Model Content

[0003] The purpose of this application is to provide a wind turbine speed control circuit device, a speed-regulating wind turbine, and an energy storage device, which can solve the problem that controlling the speed of multiple wind turbines with a single PWM signal requires additional optocouplers and CPU control pins, which greatly increases manufacturing costs.

[0004] In a first aspect, embodiments of this application provide a fan speed control circuit device.

[0005] Secondly, embodiments of this application provide a speed-regulating fan.

[0006] Thirdly, embodiments of this application provide an energy storage device.

[0007] To achieve the above objectives, an embodiment of the first aspect of this application provides a fan speed control circuit device, which includes: an optocoupler isolation component, comprising an optocoupler and a first capacitor, wherein a first terminal of the first capacitor is grounded and a second terminal of the first capacitor is connected to the power supply terminal of the optocoupler; a control circuit, comprising a control chip and a first transistor, wherein the base of the first transistor is connected to the control chip, the collector of the first transistor is connected to the cathode of the optocoupler, and the emitter of the first transistor is grounded; and a push-pull circuit, comprising a second transistor and a third transistor. The third capacitor and the base of the second transistor are connected to the output terminal of the optocoupler. The emitter of the second transistor is connected to the emitter of the third transistor. The collector of the third transistor is connected to the output terminal of the optocoupler. The first terminal of the third capacitor is connected to the emitter of the third transistor, and the second terminal of the third capacitor is connected to the emitter of the second transistor. Multiple speed control circuits are included, each containing a current-limiting resistor connected to the emitter of the second transistor. The output signal of the control circuit is transmitted to each speed control circuit through an optocoupler isolation component and a push-pull circuit. A current-limiting component is connected to the anode of the optocoupler.

[0008] The wind turbine speed control circuit device proposed in this application mainly includes an optocoupler isolation component, a control circuit, a push-pull circuit, multiple speed control circuits, and a current limiting component. Specifically, the optocoupler isolation component includes an optocoupler and a first capacitor. The optocoupler is a fast optocoupler, which isolates the input and output sides. Due to the short turn-on and turn-off time of the fast optocoupler, the short turn-on or turn-off time can meet the switching between high and low frequencies of the speed control circuit, thereby realizing the switching between high-speed output and low-speed output through the speed control circuit. On the other hand, the optocoupler transmits signals through optical signals to achieve electrical isolation between the input and output sides. That is, the electrical signal at the input end drives the light-emitting diode to emit light, and the optical signal is converted into an electrical signal output by the receiving part. Through the electro-optical-electro-electrical conversion, the anti-interference capability of the wind turbine speed control circuit device is enhanced, preventing the electrical signal from interfering with the wind turbine speed control circuit device during the use of high-power equipment, thereby achieving electrical isolation. Furthermore, a first capacitor is used in the optocoupler isolation assembly to connect to the power supply terminal of the optocoupler. This first capacitor serves as a decoupling capacitor for the output power supply of the optocoupler. Based on the electrical isolation provided by the optocoupler, the stability of the power supply voltage during high-speed switching is ensured. By filtering out high-frequency noise, the noise from the optocoupler isolation assembly to the power supply terminal is reduced, thereby indirectly reducing the impact of optocoupler noise on the control circuit, push-pull circuit, and speed regulation circuit in the wind turbine speed regulation circuit, improving the stability of the wind turbine speed regulation circuit. The control circuit includes a control chip and a first transistor. The base of the first transistor is connected to the control chip, and the collector of the first transistor is connected to the cathode of the optocoupler. That is, the control chip connects to the optocoupler through the first transistor, and the control chip uses the first transistor to enhance the driving capability to control the switching on and off of the optocoupler in the optocoupler isolation assembly. The control chip serves as the signal input terminal in the wind turbine speed regulation circuit, transmitting the control signal to the optocoupler isolation assembly. Finally, the control signal is isolated by the optocoupler isolation assembly and amplified by the push-pull circuit before being input to multiple speed regulation circuits to regulate their speeds. The current-limiting component is connected to the anode of the optocoupler. The fan speed control circuit uses a current-limiting resistor to prevent excessive current from entering the circuit and damaging the optocoupler isolation component. The push-pull circuit includes a second transistor, a third transistor, and a third capacitor. The bases of both the second and third transistors are connected to the output of the optocoupler. The push-pull circuit filters the signal through the third capacitor, removing noise and spurious signals. The third capacitor also enables smooth switching between the third and second transistors, making the output signal of the push-pull circuit smoother and more stable. The output signal of the control chip is amplified by the push-pull circuit after passing through the optocoupler isolation component, thereby enhancing the output drive capability of the optocoupler. This allows one output control signal from the control chip to control multiple speed control circuits to output high-speed or low-speed signals, and the control signals are isolated from each other by the optocoupler isolation component, preventing interference.

[0009] Furthermore, the output signal of the control circuit is a PWM signal.

[0010] In the control circuit, the output signal of the control chip is a Pulse Width Modulation (PWM) signal, which controls the average voltage or current in the circuit by adjusting the duty cycle of the pulse. In the fan speed control circuit, the duty cycle of the PWM signal output by the control circuit is changed to correspondingly adjust the duty cycle of the output signals of multiple speed control circuits, thereby regulating the fan speed. Specifically, after the PWM signal is isolated by an optocoupler and amplified by a push-pull circuit, the amplified drive current is obtained, driving multiple fans to rotate. During fan rotation, when the duty cycle of the PWM signal output by the control chip is high, the duty cycle of the input signals received by the multiple speed control circuits is also high, resulting in the fan motors operating at high speeds. Conversely, when the duty cycle of the PWM signal output by the control chip is low, the duty cycle of the input signals received by the multiple speed control circuits is also low, resulting in the fan motors operating at low speeds. By adjusting the duty cycle of the output signal through the control chip, the output signals of multiple speed control circuits are continuously regulated.

[0011] Furthermore, the control circuit also includes a temperature sensor, which is electrically connected to the control chip. The ambient temperature value detected by the temperature sensor is positively correlated with the duty cycle of the output signal of the control chip.

[0012] The control chip collects the internal ambient temperature of the fan speed control circuit via a temperature sensor. The temperature sensor and control chip are electrically connected. After the ambient temperature value collected by the temperature sensor is transmitted to the control chip, the control chip adjusts the duty cycle of the output PWM signal accordingly. The ambient temperature value detected by the temperature sensor and the corresponding duty cycle of the control chip's output signal are positively correlated. Specifically, an ambient temperature threshold can be set. When the collected ambient temperature value is greater than the threshold, it is determined that the ambient temperature is too high. The control chip then determines that multiple speed control circuits need to output high-speed signals to dissipate heat from the internal environment of the fan speed control circuit. The control chip sets the duty cycle of the output PWM high, and the output signals of multiple speed control circuits are correspondingly set high. Conversely, when the collected ambient temperature value is less than the threshold, it is determined that the ambient temperature is too low. The control chip then determines that multiple speed control circuits need to output low-speed signals to maintain the internal ambient temperature of the fan speed control circuit and reduce additional power input. The control chip sets the duty cycle of the output PWM low, and the output signals of multiple speed control circuits are correspondingly set low.

[0013] Understandably, the control chip detects the current ambient temperature through a temperature sensor and judges the ambient temperature based on the ambient temperature threshold. If the ambient temperature is too high or too low, the output PWM duty cycle is set high or low respectively. After the optocoupler in the optocoupler isolation component is quickly turned on or off, and the signal is amplified by the push-pull circuit, the output PWM signal is transmitted to multiple speed control circuits. Each speed control circuit adjusts the output signal accordingly based on the input PWM signal.

[0014] Furthermore, the push-pull circuit also includes: a fourth resistor, the first end of which is connected to the output terminal of the optocoupler, and the second end of which is connected to the emitter of the second transistor; and a fifth resistor, the first end of which is connected to the second end of the fourth resistor, and the second end of which is connected to multiple speed control circuits.

[0015] In the push-pull circuit, a fourth and a fifth resistor are configured. Specifically, the first end of the fourth resistor is connected to the output of the optocoupler, and the second end is connected to the emitter of the second transistor. The first end of the fifth resistor is connected to the second end of the fourth resistor, and the second end of the fifth resistor is connected to multiple speed control circuits. In other words, the fourth resistor connects the optocoupler isolation component and the push-pull circuit, and the fifth resistor connects the push-pull circuit to multiple speed control circuits; the fourth and fifth resistors are connected in series. This connection of the fourth resistor to the optocoupler isolation component limits the current flowing between the second and third transistors, protecting them and preventing damage from excessive current. Furthermore, the fifth resistor connecting the push-pull circuit to multiple speed control circuits ensures that the PWM signal output from the control chip, after being isolated by the optocoupler isolation component and amplified by the push-pull circuit, is balanced by the fifth resistor to reduce voltage and current fluctuations and interference, making the PWM signal transmitted to the multiple speed control circuits more stable.

[0016] Furthermore, the optocoupler isolation component also includes: a second resistor, the first end of which is connected to the output terminal of the optocoupler, and the second end of which is connected to the base of the second transistor; a second capacitor, the first end of which is connected to the second end of the second resistor, and the second end of which is connected to the ground terminal of the optocoupler; and a third resistor, the first end of which is connected to the second end of the second resistor, and the second end of which is connected to the second end of the second capacitor.

[0017] A second capacitor is added to the output terminal of the optocoupler to further eliminate stray high-frequency interference signals, improve the signal-to-noise ratio, and ensure the clarity and reliability of the PWM signal output from the optocoupler. A second and a third resistor are also added to the output terminal of the optocoupler to divide the current output by the second and third resistors, preventing damage to the push-pull circuit and multiple speed control circuits.

[0018] Furthermore, the control circuit also includes: a first resistor, the first end of which is connected to the control chip, and the second end of which is connected to the base of the first transistor.

[0019] In the control circuit, the first resistor is used as the current-limiting resistor of the first transistor. The first resistor is connected in series between the control chip and the first transistor, so that the PWM signal output by the control chip can be stably transmitted from the output terminal of the control chip to the base of the first transistor when it is in the high state, preventing damage to the first transistor. By setting the first resistor, the stability of the fan speed control circuit device is improved.

[0020] Furthermore, the current limiting component includes: a sixth resistor, the first end of which is connected to a power supply, and the second end of which is connected to the cathode of the optocoupler; and a seventh resistor, the first end of which is connected to the first end of the sixth resistor, and the second end of which is connected to the second end of the sixth resistor.

[0021] In the current-limiting component, the first terminal of the sixth resistor (5V) is connected to a DC regulated power supply, the second terminal of the sixth resistor is connected to the cathode of the optocoupler, and the seventh resistor is connected in parallel across the sixth resistor. In the fan speed control circuit, the sixth and seventh resistors serve as current-limiting resistors for the optocoupler isolation component. By using these resistors, excessive current flowing through the cathode of the optocoupler is prevented when the fan speed control circuit is turned on, thus avoiding damage to the optocoupler and ensuring its stability during operation.

[0022] Furthermore, the current limiting component also includes: an eighth resistor, the first end of which is connected to the second end of the seventh resistor, and the second end of the eighth resistor is connected to the collector of the first transistor.

[0023] When the wind turbine speed control circuit is turned on, the LED at the input of the optocoupler conducts, generating a weak current. This leads to parasitic capacitance, which affects the normal transmission of the optocoupler signal, causing the optocoupler to malfunction. By connecting an eighth resistor in parallel between the second terminal of the seventh resistor and the collector of the first transistor, malfunctions are prevented. This rapidly discharges the charge at the optocoupler input, improving the accuracy of the optocoupler's recognition of the PWM signal transmitted from the control chip during operation.

[0024] An embodiment of the second aspect of this application provides a speed-regulating fan, which is connected to a fan speed-regulating circuit device through a current-limiting resistor. The speed of the speed-regulating fan is positively correlated with the duty cycle corresponding to the output signal of the speed-regulating circuit.

[0025] In the fan speed control circuit device proposed in this application, a push-pull circuit connects multiple speed control circuits. Each speed control circuit includes a current-limiting resistor. The fan speed control circuit device is connected to a speed-regulating fan through the current-limiting resistor, and each speed control circuit is connected to one speed-regulating fan. The fan speed of the speed-regulating fan is adjusted by the output signal of the speed control circuit. When the duty cycle of the PWM signal output by the speed control circuit is high, the fan of the speed-regulating fan will operate at a high speed; when the duty cycle of the PWM signal output by the speed control circuit is low, the fan of the speed-regulating fan will operate at a low speed. By continuously adjusting the duty cycle of the output PWM signal through the control chip in the fan speed control circuit device, continuous adjustment of the fan speed of multiple speed-regulating fans is achieved.

[0026] Understandably, a single PWM signal is isolated by an optocoupler and amplified by a push-pull circuit before being output to control multiple speed-regulating fans. This reduces hardware installation costs and enables continuous adjustment of the fan speeds of multiple speed-regulating fans.

[0027] An embodiment of the third aspect of this application provides an energy storage device, which includes an energy storage component, a fan speed control circuit device provided in the first aspect, and a plurality of speed-regulating fans provided in the second aspect.

[0028] A single PWM signal, transmitted via an optocoupler and push-pull circuit, controls multiple variable-speed fans. The control chip in this circuit collects the internal ambient temperature and determines the duty cycle of the output PWM signal based on this temperature. The PWM signal is then isolated by the optocoupler and amplified by the push-pull circuit before being transmitted to the multiple variable-speed fans. This allows the fans to operate at high speeds to cool the equipment or at low speeds to save power. Specifically, when the ambient temperature is higher than the threshold, the fans need to operate at maximum speed for heat dissipation, resulting in the highest duty cycle of the PWM signal output by the control chip and the maximum speed of the multiple variable-speed fans. Conversely, when the ambient temperature is lower than the threshold, the energy storage device's temperature is moderate, and the fan speed is less critical. The control chip adjusts the PWM duty cycle to a lower value, reducing the speed of the multiple variable-speed fans and saving power.

[0029] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0030] Figure 1 A topology schematic diagram of a fan speed control circuit device according to one embodiment of this application is shown;

[0031] Figure 2 A topology schematic diagram of a fan speed control circuit device according to one embodiment of this application is shown;

[0032] Figure 3 A schematic block diagram of an energy storage device according to one embodiment of this application is shown;

[0033] Figure 4 A topological schematic diagram of a fan speed control circuit device according to one embodiment of this application is shown.

[0034] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0035] 1000: Optocoupler isolation component; 2000: Push-pull circuit; 3000: Control circuit; 400: Speed ​​control circuit; 300: Current limiting component; 200: Control chip; 202: Temperature sensor; 100: Optocoupler; R1: First resistor; Q1: First transistor; Q2: Second transistor; Q3: Third transistor; C1: First capacitor; C2: Second capacitor; C3: Third capacitor; R2: Second resistor; R3: Third resistor; R4: Fourth resistor; R5: Fifth resistor; R6: Sixth resistor; R7: Seventh resistor; R8: Eighth resistor; Rc: Current limiting resistor; 5000: Speed-regulating fan; 6000: Fan speed control circuit device; 7000: Energy storage component; 9000: Energy storage device. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0037] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] The following is combined with Figures 1 to 4The wind turbine speed control circuit device, speed-regulating wind turbine, and energy storage device provided in this application will be described in detail through specific embodiments and application scenarios.

[0039] This embodiment provides a fan speed control circuit device 6000, such as... Figure 1 As shown, the fan speed control circuit device 6000 includes: an optocoupler isolation component 1000, which includes an optocoupler 100 and a first capacitor C1. The first terminal of the first capacitor C1 is grounded, and the second terminal of the first capacitor C1 is connected to the power supply terminal of the optocoupler 100; a control circuit 3000, which includes a control chip 200 and a first transistor Q1. The base of the first transistor Q1 is connected to the control chip 200, the collector of the first transistor Q1 is connected to the cathode of the optocoupler 100, and the emitter of the first transistor Q1 is grounded; and a push-pull circuit 2000, which includes a second transistor Q2, a third transistor Q3, and a third capacitor C3. The second transistor Q2... The base of the first transistor Q2 is connected to the output terminal of the optocoupler 100. The emitter of the second transistor Q2 is connected to the emitter of the third transistor Q3. The collector of the third transistor Q3 is connected to the output terminal of the optocoupler 100. The first terminal of the third capacitor C3 is connected to the emitter of the third transistor Q3. The second terminal of the third capacitor C3 is connected to the emitter of the second transistor Q2. Multiple speed control circuits 400 are included, each including a current-limiting resistor Rc connected to the emitter of the second transistor Q2. The output signal of the control circuit 3000 is transmitted to each speed control circuit 400 through the optocoupler isolation component 1000 and the push-pull circuit 2000. A current-limiting component 300 is connected to the anode of the optocoupler 100.

[0040] The wind turbine speed control circuit device 6000 proposed in this application mainly includes an optocoupler isolation component 1000, a control circuit 3000, a push-pull circuit 2000, multiple speed control circuits 400, and a current limiting component 300. Specifically, the optocoupler isolation component 1000 includes an optocoupler 100 and a first capacitor C1. The optocoupler 100 is a fast optocoupler, which isolates the input side and the output side. Because the fast optocoupler has a short turn-on and turn-off time, the short turn-on or turn-off time can meet the switching between high and low frequencies of the speed control circuit 400, thereby realizing the switching between high speed output and low speed output through the speed control circuit 400. On the other hand, the optocoupler 100 transmits signals through optical signals to achieve electrical isolation between the input and output sides. That is, the electrical signal at the input end drives the light-emitting diode to emit light, and the optical signal is converted into an electrical signal output by the receiving part. Through the electrical-optical-electrical conversion, the anti-interference capability of the fan speed control circuit device 6000 is enhanced, and the electrical signal is prevented from interfering with the fan speed control circuit device 6000 during the use of high-power equipment connected to the circuit, thereby achieving electrical isolation. Furthermore, a first capacitor C1 is used in the optocoupler isolation component 1000 to connect to the power supply terminal of the optocoupler 100. The first capacitor C1 is used as a decoupling capacitor for the power supply on the output side of the optocoupler. Based on the electrical isolation of the optocoupler 100, the stability of the power supply voltage of the optocoupler 100 during high-speed switching is ensured. By filtering out high-frequency noise, the noise from the optocoupler isolation component 1000 to the power supply terminal is reduced, thereby indirectly reducing the impact of the noise from the optocoupler 100 on the control circuit 3000, push-pull circuit 2000 and speed regulation circuit 400 in the fan speed regulation circuit device 6000, and improving the stability of the fan speed regulation circuit device 6000. The control circuit 3000 includes a control chip 200 and a first transistor Q1. The base of the first transistor Q1 is connected to the control chip 200, and the collector of the first transistor Q1 is connected to the cathode of the optocoupler 100. In other words, the control chip 200 is connected to the optocoupler 100 through the first transistor Q1. The control chip 200 enhances the driving capability through the first transistor Q1 to control the switching on and off of the optocoupler 100 in the optocoupler isolation component 1000. The control chip 200 serves as the signal input terminal in the fan speed control circuit device 6000, transmitting the control signal to the optocoupler isolation component 1000. Finally, the control signal is isolated by the optocoupler isolation component 1000 and amplified by the push-pull circuit 2000 before being input to multiple speed control circuits 400 to regulate the speed of the multiple speed control circuits 400. The current limiting component 300 is connected to the anode of the optocoupler 100. The fan speed control circuit device 6000 prevents excessive current from entering the circuit when it is turned on, thus preventing damage to the optocoupler isolation component 1000.The push-pull circuit 2000 includes a second transistor Q2, a third transistor Q3, and a third capacitor C3. The bases of both the second transistor Q2 and the third transistor Q3 are connected to the output of the optocoupler 100. The push-pull circuit 2000 filters the signal through the third capacitor C3 to remove noise and spurious signals. The third capacitor C3 also enables smooth switching between the third transistor Q3 and the second transistor Q2, making the output signal of the push-pull circuit 2000 smoother and more stable. The output signal of the control chip 200 is amplified by the push-pull circuit 2000 after passing through the optocoupler isolation component 1000, thereby enhancing the output driving capability of the optocoupler. This allows one output control signal from the control chip 200 to control multiple speed control circuits 400 to output high-speed or low-speed output signals. Furthermore, the control signals are isolated from each other by the optocoupler isolation component 1000, preventing interference.

[0041] Understandably, this application uses the fan speed control circuit device 6000 to realize that one PWM signal controls multiple speed control circuits 400 through the optocoupler 100 and push-pull circuit 2000. The PWM signal is electrically isolated by the optocoupler isolation component 1000, and the PWM signal is amplified by the push-pull circuit 2000 to increase the output current and improve the load capacity, thereby controlling the multiple speed control circuits 400 to output high-speed output signals or low-speed output signals.

[0042] Optionally, the number of speed control circuits in the fan speed control circuit device provided in this application is at least three.

[0043] Optionally, the control chip is a microcontroller with PWM output function.

[0044] In one embodiment, the output signal of the control circuit 3000 is a PWM signal.

[0045] In the control circuit 3000, the output signal of the control chip 200 is a pulse width modulation (PWM) signal, which controls the average voltage or current in the circuit 3000 by adjusting the duty cycle of the pulse. In the fan speed control circuit device 6000, the fan speed is adjusted by changing the duty cycle of the PWM signal output by the control circuit 3000, which in turn adjusts the duty cycle of the output signals of multiple speed control circuits 400. The PWM signal, after being isolated by the optocoupler isolation component 1000 and amplified by the push-pull circuit 2000, becomes an amplified drive current that drives multiple fans to rotate. During fan rotation, when the duty cycle of the PWM signal output by the control chip 200 is high, the duty cycle of the input signals received by the multiple speed control circuits 400 is also high, causing the fan motor to operate at a high speed. Conversely, when the duty cycle of the PWM signal output by the control chip 200 is low, the duty cycle of the input signals received by the multiple speed control circuits 400 is also low, causing the fan motor to operate at a low speed. By adjusting the duty cycle of the output signal through the control chip 200, the output signals of the multiple speed control circuits 400 are continuously adjusted.

[0046] In one embodiment, such as Figure 2 As shown, the control circuit 3000 also includes a temperature sensor 202, which is electrically connected to the control chip 200. The ambient temperature value detected by the temperature sensor 202 is positively correlated with the duty cycle of the output signal of the control chip 200.

[0047] The control chip 200 collects the ambient temperature inside the equipment where the fan speed control circuit device 6000 is located through the temperature sensor 202. The temperature sensor 202 and the control chip 200 are electrically connected. After the ambient temperature value collected by the temperature sensor 202 is transmitted to the control chip 200, the control chip 200 adjusts the duty cycle of the output PWM signal accordingly based on the ambient temperature value. The ambient temperature value detected by the temperature sensor 202 is positively correlated with the duty cycle of the output signal of the control chip 200. Specifically, an ambient temperature threshold can be set. When the collected ambient temperature value is greater than the threshold, it is determined that the ambient temperature is too high. Then, the control chip 200 determines that multiple speed control circuits 400 need to output high-speed signals to dissipate heat from the internal environment of the fan speed control circuit device 6000. The control chip 200 sets the duty cycle of the output PWM high, and the output signals of multiple speed control circuits 400 are correspondingly set high. When the collected ambient temperature value is less than the threshold, it is determined that the ambient temperature is too low. Then, the control chip 200 determines that multiple speed control circuits 400 need to output low-speed signals to maintain the internal ambient temperature of the fan speed control circuit device 6000 and reduce additional power input. The control chip 200 sets the duty cycle of the output PWM low, and the output signals of multiple speed control circuits 400 are correspondingly set low.

[0048] Understandably, the control chip 200 detects the current ambient temperature through the temperature sensor 202 and judges the ambient temperature according to the ambient temperature threshold. When the ambient temperature is too high or too low, the output PWM duty cycle is set high or low respectively. After the optocoupler 100 in the optocoupler isolation component 1000 is quickly turned on or off, and the signal is amplified by the push-pull circuit 2000, the output PWM signal is transmitted to multiple speed control circuits 400. Each speed control circuit 400 adjusts the output signal accordingly according to the input PWM signal.

[0049] In one embodiment, such as Figure 2 As shown, the push-pull circuit 2000 also includes: a fourth resistor R4, the first end of which is connected to the output terminal of the optocoupler 100, and the second end of which is connected to the emitter of the second transistor Q2; and a fifth resistor R5, the first end of which is connected to the second end of the fourth resistor R4, and the second end of which is connected to multiple speed control circuits 400.

[0050] In the push-pull circuit 2000, a fourth resistor R4 and a fifth resistor R5 are configured. Specifically, the first end of the fourth resistor R4 is connected to the output terminal of the optocoupler 100, and the second end of the fourth resistor R4 is connected to the emitter of the second transistor Q2. The first end of the fifth resistor R5 is connected to the second end of the fourth resistor R4, and the second end of the fifth resistor R5 is connected to multiple speed control circuits 400. That is, the optocoupler isolation component 1000 and the push-pull circuit 2000 are connected through the fourth resistor R4, and the push-pull circuit 2000 and multiple speed control circuits 400 are connected through the fifth resistor R5. The fourth resistor R4 and the fifth resistor R5 are connected in series. In the push-pull circuit 2000, the way the fourth resistor R4 connects the optocoupler isolation component 1000 and the push-pull circuit 2000 limits the current flowing between the second transistor Q2 and the third transistor Q3, protecting the second transistor Q2 and the third transistor Q3 and preventing damage to them in the event of excessive current. Furthermore, by connecting the push-pull circuit 2000 and multiple speed control circuits 400 through the fifth resistor R5, the PWM signal output by the control chip 200 is isolated by the optocoupler isolation component 1000 and amplified by the push-pull circuit 2000. Then, the voltage and current in the circuit are balanced by the fifth resistor R5, reducing fluctuations and interference in the circuit, and making the PWM signal transmitted to the multiple speed control circuits 400 more stable.

[0051] In one embodiment, such as Figure 2As shown, the optocoupler isolation assembly 1000 further includes: a second resistor R2, the first end of which is connected to the output terminal of the optocoupler 100, and the second end of which is connected to the base of the second transistor Q2; a second capacitor C2, the first end of which is connected to the second end of the second resistor R2, and the second end of which is connected to the ground terminal of the optocoupler 100; and a third resistor R3, the first end of which is connected to the second end of the second resistor R2, and the second end of which is connected to the second end of the second capacitor C2.

[0052] A second capacitor C2 is provided at the output terminal of the optocoupler 100. This capacitor further eliminates stray high-frequency interference signals, improves the signal-to-noise ratio, and ensures the clarity and reliability of the PWM signal output from the optocoupler 100. A second resistor R2 and a third resistor R3 are also provided at the output terminal of the optocoupler 100. These resistors divide the current output by the optocoupler 100, preventing damage to the push-pull circuit 2000 and the multiple speed control circuits 400.

[0053] In one embodiment, such as Figure 2 As shown, the control circuit 3000 also includes: a first resistor R1, the first end of the first resistor R1 is connected to the control chip 200, and the second end of the first resistor R1 is connected to the base of the first transistor Q1.

[0054] In the control circuit 3000, the first resistor R1 is used as the current-limiting resistor Rc of the first transistor Q1. The first resistor R1 is connected in series between the control chip 200 and the first transistor Q1, so that the PWM signal output by the control chip 200 can be stably transmitted from the output terminal of the control chip 200 to the base of the first transistor Q1 when it is in the high state, thus preventing damage to the first transistor Q1. By setting the first resistor R1, the stability of the fan speed control circuit device 6000 is improved.

[0055] In one embodiment, such as Figure 2 As shown, the current limiting component 300 includes: a sixth resistor R6, the first end of which is connected to a power supply, and the second end of which is connected to the cathode of the optocoupler 100; and a seventh resistor R7, the first end of which is connected to the first end of the sixth resistor R6, and the second end of which is connected to the second end of the sixth resistor R6.

[0056] In the current limiting component 300, the first end of the sixth resistor R6 is connected to a 5V DC regulated power supply, the second end of the sixth resistor R6 is connected to the cathode of the optocoupler 100, and the seventh resistor R7 is connected in parallel across the sixth resistor R6. In the fan speed control circuit device 6000, the sixth resistor R6 and the seventh resistor R7 serve as the current limiting resistor Rc of the optocoupler isolation component 1000. By setting the sixth resistor R6 and the seventh resistor R7, excessive current flowing through the cathode of the optocoupler 100 is prevented when the fan speed control circuit device 6000 is turned on, thus preventing damage to the optocoupler 100 and ensuring the stability of the optocoupler 100 during operation.

[0057] In one embodiment, such as Figure 2 As shown, the current limiting component 300 also includes: an eighth resistor R8, the first end of the eighth resistor R8 is connected to the second end of the seventh resistor R7, and the second end of the eighth resistor R8 is connected to the collector of the first transistor Q1.

[0058] When the fan speed control circuit 6000 is turned on, the LED at the input terminal of the optocoupler 100 will generate a weak current, leading to the presence of parasitic capacitance. This parasitic capacitance will affect the normal transmission of the optocoupler signal, causing the optocoupler 100 to malfunction. To prevent malfunction, an eighth resistor R8 is connected in parallel between the second terminal of the seventh resistor R7 and the collector of the first transistor Q1. This rapidly discharges the charge at the input terminal of the optocoupler 100, improving the accuracy of the optocoupler 100 in recognizing the PWM signal transmitted from the control chip 200 during operation.

[0059] like Figure 2 As shown in the embodiment of this application, a speed-regulating fan 5000 is also provided. The speed-regulating fan 5000 is connected to the fan speed regulation circuit device 6000 through a current-limiting resistor Rc. The speed of the speed-regulating fan 5000 is positively correlated with the duty cycle corresponding to the output signal of the speed regulation circuit 400.

[0060] In the fan speed control circuit device 6000 proposed in this application, a push-pull circuit 2000 connects multiple speed control circuits 400. Each speed control circuit 400 includes a current-limiting resistor Rc. The fan speed control circuit device 6000 is connected to a speed-regulating fan 5000 through the current-limiting resistor Rc, and each speed control circuit 400 is connected to one speed-regulating fan 5000. The fan speed of the speed-regulating fan 5000 is adjusted by the output signal of the speed control circuit 400. When the duty cycle of the PWM signal output by the speed control circuit 400 is high, the fan of the speed-regulating fan 5000 will operate at a high speed; when the duty cycle of the PWM signal output by the speed control circuit 400 is low, the fan of the speed-regulating fan 5000 will operate at a low speed. By continuously adjusting the duty cycle of the output PWM signal through the control chip 200 in the fan speed control circuit device 6000, continuous adjustment of the fan speed of multiple speed-regulating fans 5000 is achieved.

[0061] Understandably, a single PWM signal is isolated by an optocoupler isolation component 1000 and amplified by a push-pull circuit 2000 before being output to control a multi-channel speed-regulating fan 5000. This reduces hardware installation costs and enables continuous adjustment of the fan speed of the multi-channel speed-regulating fan 5000.

[0062] like Figure 3 As shown, this application embodiment also provides an energy storage device 9000, which includes an energy storage component 7000, a fan speed regulation circuit device 6000 provided in the first aspect, and a plurality of speed regulation fans 5000 provided in the second aspect.

[0063] The fan speed control circuit device 6000 generates a PWM signal that controls multiple speed-regulating fans 5000 via an optocoupler 100 and a push-pull circuit 2000. The control chip 200 in the fan speed control circuit device 6000 collects the internal ambient temperature of the equipment and determines the duty cycle of the output PWM based on the current ambient temperature value. After the PWM signal is isolated by the optocoupler isolation component 1000 and amplified by the push-pull circuit 2000, it is transmitted to multiple speed-regulating fans 5000 via the speed control circuit 400, enabling the speed-regulating fans 5000 to rotate at high speed to cool the equipment or operate at low speed to save power resources. Specifically, when the ambient temperature is higher than the ambient temperature threshold, the fan needs to operate at maximum speed for heat dissipation. In this case, the duty cycle of the PWM signal output by the control chip 200 is at its highest, and the speed of the multi-channel speed-regulating fan 5000 is at its maximum. If the ambient temperature is lower than the ambient temperature threshold, the temperature of the energy storage device 9000 is moderate, and the fan speed does not need to be too high. By adjusting the PWM duty cycle of the control chip 200 to a lower value, the speed of the multi-channel speed-regulating fan 5000 is reduced, thus saving power resources.

[0064] Optionally, the energy storage device 9000 is a power conversion system (PCS). The PCS can control the charging and discharging process of the battery. During the charging and discharging process, heat interaction is generated. The control chip collects the internal ambient temperature of the device and determines the required airflow speed to cool the PCS based on the current ambient temperature value. That is, it switches between high duty cycle PWM signal and low duty cycle PWM signal output to achieve synchronous control of the speed of multiple speed-regulating fans.

[0065] In one specific embodiment, such as Figure 4 As shown, the fan speed control circuit 6000 uses a fast optocoupler U1 (ACPL-W61L-560E) for input-output isolation. The purpose of using a fast optocoupler is that its short turn-on and turn-off times meet the frequency requirements of the fan speed control PWM, and it effectively isolates interference generated during fan operation, preventing this interference from affecting internal control. Resistor R1 (the first resistor) is the current-limiting resistor for transistor Q1 (MMBT4401LT1G). The control signal PWM_CPU uses transistor Q1 to increase its driving capability and control the on / off state of the optocoupler. Resistors R6 (the sixth resistor) and R7 (the seventh resistor) are current-limiting resistors for optocoupler turn-on, preventing excessive current and damage to the optocoupler during turn-on. Resistor R8 (the eighth resistor) prevents malfunction of the optocoupler. Capacitor C1 (the first capacitor) is the decoupling capacitor for the optocoupler output power supply. Pin 5 of optocoupler U1 (i.e., optocoupler 100) is the output signal of the optocoupler. Resistors R2 (the second resistor) and R3 (the third resistor) divide the voltage to adjust the output voltage value and prevent damage to subsequent circuits. Transistors Q2 (MMBT4401LT1G) and Q3 (MMBT4403LT1G), along with resistors R4 (the fourth resistor) and R5 (the fifth resistor), form a push-pull circuit. The main design point of this scheme is to combine this push-pull circuit with the optocoupler to increase the output drive capability of the optocoupler, thereby meeting the speed control requirements of multiple fans. The three resistors Rc are current-limiting resistors for the speed control inputs of the three fans. These three resistors control the speed control ports of the three fans, thus achieving the goal of using a single PWM signal to control the speed of three fans without interference.

[0066] Specifically, the resistance of resistor R1 is 1KΩ, the resistance of resistor R2 is 100Ω, the resistance of resistor R6 is 3.01KΩ, the resistance of resistor Rc is 100Ω, the resistance of resistor R3 is 5.62KΩ, the resistance of resistor R4 is 100Ω, the resistance of resistor R5 is 33Ω, the resistance of resistor R7 is 3.01KΩ, the resistance of resistor R8 is 5.11KΩ, the capacitance of capacitor C1 is 100nF, capacitor C2 is used as a spare capacitor, and the capacitance of capacitor C3 is 1nF.

[0067] The device control chip collects the internal ambient temperature of the device and determines the required fan speed to cool the internal environment based on the current temperature value. If the temperature is too high, the fan needs to run at maximum speed, the PWM signal duty cycle is at its highest, and the fan speed is at its maximum. If the temperature is moderate, the fan speed does not need to be too high, and the PWM duty cycle is adjusted to reduce the required fan speed.

[0068] Adjusting the fan speed according to different temperatures can significantly reduce the fan supply current and power consumption in the fan. Furthermore, controlling multiple fans through a single PWM signal via an optocoupler and push-pull output reduces hardware costs and achieves synchronized control of multiple fan speeds.

[0069] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0070] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0071] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A fan speed control circuit device, characterized in that, include: An optocoupler isolation assembly, comprising an optocoupler and a first capacitor, wherein a first terminal of the first capacitor is grounded and a second terminal of the first capacitor is connected to the power supply terminal of the optocoupler; The control circuit includes a control chip and a first transistor, the base of the first transistor is connected to the control chip, the collector of the first transistor is connected to the cathode of the optocoupler, and the emitter of the first transistor is grounded. A push-pull circuit, comprising a second transistor, a third transistor, and a third capacitor, wherein the base of the second transistor is connected to the output terminal of the optocoupler, the emitter of the second transistor is connected to the emitter of the third transistor, the collector of the third transistor is connected to the output terminal of the optocoupler, the first terminal of the third capacitor is connected to the emitter of the third transistor, and the second terminal of the third capacitor is connected to the emitter of the second transistor; Multiple speed control circuits, each speed control circuit including a current-limiting resistor connected to the emitter of the second transistor, and the output signal of the control circuit transmitted to each speed control circuit through the optocoupler isolation component and the push-pull circuit; A current limiting component is connected to the anode of the optocoupler.

2. The fan speed control circuit device according to claim 1, characterized in that, The output signal of the control circuit is a PWM signal.

3. The fan speed control circuit device according to claim 2, characterized in that, The control circuit also includes: A temperature sensor is electrically connected to the control chip, and the ambient temperature value detected by the temperature sensor is positively correlated with the duty cycle of the output signal of the control chip.

4. The fan speed control circuit device according to claim 1, characterized in that, The push-pull circuit also includes: The fourth resistor has its first end connected to the output terminal of the optocoupler and its second end connected to the emitter of the second transistor. The fifth resistor has its first end connected to the second end of the fourth resistor, and the second end of the fifth resistor is connected to multiple speed control circuits.

5. The fan speed control circuit device according to claim 1, characterized in that, The optocoupler isolation component also includes: The second resistor has its first end connected to the output terminal of the optocoupler and its second end connected to the base of the second transistor. The second capacitor has its first end connected to the second end of the second resistor, and its second end connected to the ground terminal of the optocoupler. The third resistor has its first end connected to the second end of the second resistor, and its second end connected to the second end of the second capacitor.

6. The fan speed control circuit device according to claim 1, characterized in that, The control circuit also includes: A first resistor, the first end of which is connected to the control chip, and the second end of which is connected to the base of the first transistor.

7. The fan speed control circuit device according to claim 1, characterized in that, The current limiting component includes: The sixth resistor has its first end connected to a power source and its second end connected to the cathode of the optocoupler. The seventh resistor has its first end connected to the first end of the sixth resistor, and its second end connected to the second end of the sixth resistor.

8. The fan speed control circuit device according to claim 7, characterized in that, The current-limiting resistor also includes: The eighth resistor has its first end connected to the second end of the seventh resistor, and its second end connected to the collector of the first transistor.

9. A speed-regulating fan, characterized in that, For connecting the fan speed control circuit device as described in any one of claims 1 to 8, the speed control fan is connected to the fan speed control circuit device through a current limiting resistor, and the speed of the speed control fan is positively correlated with the duty cycle corresponding to the output signal of the speed control circuit.

10. An energy storage device, characterized in that, It includes an energy storage component, a wind turbine speed control circuit device according to any one of claims 1 to 8, and a plurality of speed-regulating wind turbines according to claims 9.

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