Fan power test system
By introducing a speed control device and a power meter into the wind turbine power testing system, and using sensors and PID modules to control the wind turbine speed, the problem of power testing errors caused by wind turbine speed fluctuations has been solved, thus achieving accuracy in wind turbine power testing and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-03-10
AI Technical Summary
In existing fan power testing, the power test results are often inaccurate due to fluctuations in fan speed. This leads to unqualified fans being used as qualified ones, which in turn affects the reliability of gas-fired water heating equipment.
A speed control device and a power meter are used. The fan speed is detected by a sensor, and the fan speed is controlled by a PID module and PWM signal to maintain the fan speed at the target speed, ensuring the accuracy of the power test.
By precisely controlling the fan speed, power test errors caused by speed fluctuations are avoided, ensuring the accuracy of fan power test results and the reliability of the equipment.
Smart Images
Figure CN121630784A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of wind turbine testing, and more particularly to a wind turbine power testing system. Background Technology
[0002] The fan is a key component of gas-fired water heaters. During incoming material inspection, multiple tests are typically performed to determine if it meets quality requirements, with fan input power (hereinafter referred to as fan power) being a crucial test item. Current fan power testing methods usually involve applying a fixed voltage to the fan to maintain a fixed speed, such as 2500 rpm, and then measuring the input power corresponding to that speed using instruments. However, the fixed speed set in this way is prone to fluctuation. Furthermore, since the fan input power is roughly proportional to the cube of the speed, even slight fluctuations in fan speed can lead to significant deviations in fan power. In other words, even if the measured fan power is within the acceptable range, the actual fan power at the set speed may be completely outside the range. This results in a substandard fan being used as a qualified one, making the gas-fired water heater prone to malfunctions during operation. Summary of the Invention
[0003] To overcome the problems existing in the background art, this disclosure provides a wind turbine power testing system.
[0004] This disclosure provides a wind turbine power testing system, including a wind turbine under test (WT), a speed control device, and a power meter. The WT has a sensor for detecting its rotational speed. The speed control device is electrically connected to the WT and has a controller configured to acquire the WT's rotational speed via its sensor and output an electrical signal to the WT to control its rotational speed at a target speed. The power meter is electrically connected to both the WT and the speed control device; it is configured to measure the current power of the WT when the speed control device determines that the WT has reached the target speed.
[0005] In some embodiments, the sensor described above is a Hall sensor or a photoelectric sensor.
[0006] In some embodiments, the controller controls the fan speed at the target speed by outputting an electrical signal to the fan under test, including determining whether the current fan speed has reached the target speed. If not, the controller calculates the speed deviation between the current fan speed and the target speed and the corresponding control quantity, and outputs the electrical signal according to the control quantity.
[0007] In some embodiments, the controller includes a PID module that determines the control quantity based on the speed deviation.
[0008] In some embodiments, the electrical signal is a PWM signal, and the control quantity is the duty cycle of the PWM signal.
[0009] The technical solutions provided by one or more embodiments of this disclosure may include the following beneficial effects: by setting a speed control device to accurately control the fan speed at a set speed, the test results of the fan power are avoided from being affected by slight fluctuations in the speed. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] Figure 1 This is a schematic block diagram of a wind turbine power testing system according to one embodiment of the present disclosure;
[0012] Figure 2 yes Figure 1 The flowchart shown illustrates the wind turbine power testing system performing a wind turbine power test. Detailed Implementation
[0013] The embodiments shown will now be described in detail with reference to the accompanying drawings. However, these embodiments do not represent all embodiments consistent with this disclosure, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection claimed in the appended claims.
[0014] like Figure 1In the illustrated embodiment, the wind turbine power testing system includes a wind turbine under test (WT10), a speed control device 20, and a power meter 30. The WT10 may include a DC brushless motor and a sensor 11 for detecting the wind turbine speed, wherein the sensor 11 can be a Hall effect sensor or a photoelectric sensor. The speed control device 20 may include a control circuit board electrically connected to the WT10 and has a controller 21. The controller can acquire the wind turbine speed through the sensor 11 of the WT10 and output an electrical signal to the WT10 to control the wind turbine speed at a target speed, such as 2500 rpm. The controller 21 may be a control circuit comprising a processor, a memory, and several electronic components connected in a specific wiring configuration. In some embodiments, the controller may include a PID module. The power meter 30 calculates the power value by measuring parameters such as voltage, current and phase difference, thereby determining the input power of the fan under test. It is electrically connected to the fan under test 10 and the speed control device 20, and is used to measure the current power of the fan under test 10 when the fan speed reaches the target speed, so as to determine whether it meets the quality requirements.
[0015] The following combination Figure 2 The test method and steps of the wind turbine power test system are described in detail.
[0016] The fan under test 10 starts running (step 401). The controller 21 receives the electrical signal from the sensor 11 at fixed time intervals, such as 0.1 seconds, to collect the fan speed (step 402), and determines whether the current fan speed has reached the target speed (step 403). If the current fan speed has not reached the target speed, constant speed regulation is performed (step 405), that is, the speed deviation between the current fan speed and the target speed and the corresponding control quantity are calculated, and an electrical signal is output to the fan under test 10 according to the control quantity to control the fan speed at the target speed.
[0017] In some embodiments, constant speed regulation can be achieved through a PID module, which can be used to determine the control quantity based on the speed deviation. For example, assuming the speed deviation is e, the proportional term Pout = Kp × e is used for rapid response to the deviation; the integral term Iout = Ki × ∑e is used to eliminate steady-state error; and the derivative term Dout = Kd × (e - e_prev) is used to suppress overshoot. Here, Kp is the proportional parameter, Ki is the integral parameter, and Kd is the derivative parameter. These parameters can be initially set and dynamically adjusted according to load changes. Then, the output control quantity U = Pout + Iout + Dout. In some embodiments, the electrical signal output to the fan under test 10 is a PWM (Pulse Width Modulation) signal, and the control quantity is the duty cycle of the PWM signal. Thus, constant speed regulation enables the fan speed to quickly and accurately reach the target speed and maintain it constantly at that target speed. When the fan speed reaches the target speed, the controller 21 outputs a signal to the power meter 30, which then calculates the current power of the fan based on the collected parameters such as voltage and current of the fan under test (step 404). In some embodiments, the tester can determine whether the fan power meets the requirements based on the measured value displayed by the power meter; in other embodiments, the system can directly determine and output the test results.
[0018] By setting a speed control device to precisely control the fan speed at the set speed, the test results of the fan power can be avoided due to slight fluctuations in speed.
[0019] It should be understood that the methods and apparatus disclosed above can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. The division of units in the controller is only a logical functional division; in actual implementation, there may be other division methods. For example, multiple units may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the connections between the components, parts, and units discussed above can be electrical, mechanical, or other forms of connection; they can be direct connections or indirect connections through interfaces, etc.; they can be wired connections or wireless connections.
[0020] Furthermore, the units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; some or all of the units can be selected to achieve the purpose of the disclosed embodiments according to actual needs. Additionally, the functional units in the above embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or in a combination of hardware and software functional units.
[0021] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A fan power testing system, characterized by, The system comprises: a fan to be tested, having a sensor for detecting a fan rotating speed; a rotating speed control device electrically connected to the fan to be tested, having a controller configured to collect the fan rotating speed through the sensor of the fan to be tested, and output an electric signal to the fan to be tested to control the fan rotating speed at a target rotating speed; a power meter electrically connected to the fan to be tested and the rotating speed control device, configured to measure the current power of the fan to be tested when learning from the rotating speed control device that the fan rotating speed reaches the target rotating speed.
2. The fan power test system of claim 1, wherein: The sensor is a Hall sensor or a photoelectric sensor.
3. The fan power test system of claim 1, wherein: The controller, by outputting the electric signal to the fan to be tested to control the fan rotating speed at the target rotating speed, comprises judging whether the collected current fan rotating speed reaches the target rotating speed, if not, calculating a rotating speed deviation between the current fan rotating speed and the target rotating speed and a corresponding control amount, and outputting the electric signal according to the control amount.
4. The fan power test system of claim 3, wherein: The controller comprises a PID module, which determines the control amount according to the rotating speed deviation.
5. The fan power test system of claim 3 or 4, wherein: The electric signal is a PWM signal, and the control amount is a duty cycle of the PWM signal.