CN113565785A - Method for testing upwind starting capability of direct current fan of outdoor unit of air conditioner - Google Patents
Method for testing upwind starting capability of direct current fan of outdoor unit of air conditioner Download PDFInfo
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- CN113565785A CN113565785A CN202110854586.8A CN202110854586A CN113565785A CN 113565785 A CN113565785 A CN 113565785A CN 202110854586 A CN202110854586 A CN 202110854586A CN 113565785 A CN113565785 A CN 113565785A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
An embodiment of the present specification provides a method for testing a upwind starting capability of a direct current fan of an outdoor unit of an air conditioner, the method including: and judging whether the fan rotates under the action of simulated wind power when the fan is not started, if so, calculating the rotating speed of the fan under the action of the simulated wind power when the fan is not started, and respectively testing the upwind starting capability of the fan under a plurality of preset gears. The fan successfully detected by the method provided by the invention can realize upwind starting at different gears under the action of external natural wind force in an actual application scene, so that the normal operation of the whole air conditioning system is realized. The participation of personnel in the whole testing process is less, the objectivity of the testing result is improved, the human error is reduced, and the detection accuracy is improved.
Description
Technical Field
One or more embodiments of the present disclosure relate to the field of air conditioning technologies, and in particular, to a method for testing upwind starting capability of a dc fan of an outdoor unit of an air conditioner.
Background
At present, the application of the brushless direct current motor to the air conditioner is the trend of the industry, and the application of the driving technology without the position sensor to the motor control is very mature. The use of a position-less sensor in a brushless dc motor has the advantages of reduced cost, increased hardware reliability, and complete placement of the drive outside in harsh application environments. For the outdoor environment of the air conditioner, when the direct-current brushless fan rotates reversely due to strong wind, the fan is required to be started normally to help the whole air conditioning system to perform heat circulation. Therefore, how to judge the upwind starting capability of the fan is always a problem to be solved by the industry.
Disclosure of Invention
One or more embodiments of the present disclosure describe a method for testing a upwind starting capability of a dc fan of an outdoor unit of an air conditioner.
The invention provides a method for testing upwind starting capability of a direct current fan of an outdoor unit of an air conditioner, which comprises the following steps:
judging whether the fan rotates under the action of simulated wind power when the fan is not started, if so, calculating the rotating speed of the fan under the action of the simulated wind power when the fan is not started, and respectively testing the upwind starting capability of the fan under a plurality of preset gears; the method comprises the following steps of firstly, testing the upwind starting capacity of the fan at each preset gear;
s110, judging whether the rotating speed of the fan under the action of the simulated wind power is less than the maximum rotating speed corresponding to the preset gear when the fan is not started; if yes, go to S120;
s120, trying to start the fan, starting timing, and judging whether the fan is started successfully in an upwind state when the timing time reaches a preset time;
s130, if the starting is successful, recording the continuous successful starting times, and judging whether the continuous successful starting times reach the preset times; if the preset times are reached, determining that the upwind starting capability of the fan under the preset gear meets the working requirement, judging whether the preset gear is the highest gear, if so, finishing the test of the overall upwind starting capability of the fan, and displaying that the test of the overall upwind starting capability of the fan passes on the display; if the speed is not the high-speed gear, returning to S110, and testing the upwind starting capability of the next gear of the fan, wherein the rotating speed corresponding to the next gear is higher than that corresponding to the current gear; if the continuous successful starting times are not reached, returning to S120, and carrying out next test on the upwind starting capability of the fan under the preset gear;
and S140, if the fan is not started successfully, determining that the upwind starting capability of the fan at the preset gear does not meet the working requirement, finishing the test of the overall upwind starting capability of the fan, and displaying that the upwind starting capability of the fan at the preset gear is not passed on the display.
The method for testing the upwind starting capability of the direct current fan of the outdoor unit of the air conditioner provided by the embodiment of the specification judges whether the fan rotates under the action of the simulated wind power when the fan is not started through the output signal of the comparator, if the fan rotates, the rotating speed of the fan under the action of the simulated wind power when the fan is not started is calculated, the upwind starting capability test of the fan at a plurality of preset gears is respectively carried out on the fan, the test process is carried out according to the sequence from a low-speed gear to a high-speed gear, the upwind starting capability test of the next gear can be entered only after the upwind starting capability test at the previous gear passes, when the upwind starting capability test at the highest gear passes, the whole upwind starting capability test succeeds, and the whole upwind starting capability test fails as long as one time of the start fails, so that the fan passing test can meet the working requirements, in an actual application scene, the upwind starting of different gears can be realized under the action of external natural wind force, and further the normal operation of the whole air conditioning system is realized. The detection method provided by the invention has the advantages that the participation of personnel in the whole test process is less, the objectivity of the test result is improved, the human error is reduced, and the detection accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present specification, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a process of testing upwind starting capability of the fan at each preset gear in one embodiment of the present specification;
FIG. 2 is a block diagram showing the structure of a control system in one embodiment of the present specification;
FIG. 3 is a schematic diagram of an output waveform of a comparator in one embodiment of the present disclosure;
FIG. 4 is a circuit diagram of a fail prompt in one embodiment of the present description.
Detailed Description
The scheme provided by the specification is described below with reference to the accompanying drawings.
The invention provides a method for testing upwind starting capability of a direct current fan of an air conditioner outdoor unit.
The method comprises the following steps: judging whether the fan rotates under the action of simulated wind power when the fan is not started, if so, calculating the rotating speed of the fan under the action of the simulated wind power when the fan is not started, and respectively testing the upwind starting capability of the fan under a plurality of preset gears;
as shown in fig. 1, the upwind starting capability test process of the fan at each preset gear comprises the following steps;
s110, judging whether the rotating speed of the fan under the action of the simulated wind power is less than the maximum rotating speed corresponding to the preset gear when the fan is not started; if yes, go to S120;
it can be understood that if the rotating speed of the fan under the action of the simulated wind force is less than the maximum rotating speed corresponding to the preset gear when the fan is not started, the subsequent steps are executed, and the upwind starting capability of the gear is tested.
S120, trying to start the fan, starting timing, and judging whether the fan is started successfully in an upwind state when the timing time reaches a preset time;
and starting the fan, timing at the same time, and judging whether the starting is successful or not after the timing time reaches a certain time. After the successful start, the rotation speed of the fan is opposite to that of the fan when the fan is not started, so that the fan is called upwind start.
In specific implementation, whether the upwind start of the fan is successful or not can be judged in various ways, and the following method is provided: acquiring three-phase port voltages of the fan after starting, determining an output waveform of any two port voltages of the three-phase port voltages after passing through a comparator after starting, and if the frequency of the output waveform is greater than a preset threshold value, successfully starting; otherwise, the start fails; the frequency of an output waveform of any two port voltages of the three-phase port voltages before the fan is started after passing through the comparator is lower than the preset threshold value.
The waveform output by the comparator is obtained, the frequency of the waveform is determined, whether the frequency is greater than a preset threshold value or not is judged, and whether the fan is started successfully in the upwind state or not is further determined. The preset threshold value can be used for distinguishing waveforms output by the comparator before and after the fan is started. Generally, before the start, the frequency of the output waveform of the comparator is 1K-2 KHZ, and after the start, the frequency of the output waveform of the comparator is 4K-5 KHZ, and a value between the two ranges can be selected as the preset threshold value.
S130, if the starting is successful, recording the continuous successful starting times, and judging whether the continuous successful starting times reach the preset times; if the preset times are reached, determining that the upwind starting capability of the fan under the preset gear meets the working requirement, judging whether the preset gear is the highest gear, if so, finishing the test of the overall upwind starting capability of the fan, and displaying that the test of the overall upwind starting capability of the fan passes on the display; if the speed is not the high-speed gear, returning to S110, and testing the upwind starting capability of the next gear of the fan, wherein the rotating speed corresponding to the next gear is higher than that corresponding to the current gear; if the continuous successful starting times are not reached, returning to S120, and carrying out next test on the upwind starting capability of the fan under the preset gear;
that is, if the starting is successful, 1 is added to the number of consecutive successful starting times in the preset gear, and the initial value of the number of consecutive successful starting times corresponding to each preset gear is 0. And if the continuous successful starting times reach the preset times, the upwind starting capability test at the gear is successful. Next, it is determined whether the current gear is the highest gear (e.g., a high-speed gear), and if not, a headwind starting capability test in the next gear is performed, that is, the preset gear is updated to the next gear, and the process returns to S110, so that the headwind starting capability in the next gear is tested. And if the current gear is the highest gear, the upwind starting capability test under all gears is successful, the overall upwind starting capability test of the fan is successful, and the test is finished. If the number of consecutive successful starts in the current gear does not reach the preset number, the upwind start capability in the current gear needs to be tested, and the process returns to S120.
And S140, if the fan is not started successfully, determining that the upwind starting capability of the fan at the preset gear does not meet the working requirement, finishing the test of the overall upwind starting capability of the fan, and displaying that the upwind starting capability of the fan at the preset gear is not passed on the display.
That is to say, if the start fails, it indicates that the upwind starting capability of the fan at the preset gear is not satisfactory, and the upwind starting capability test is not required any more, and the whole upwind starting capability test is finished, and relevant information is displayed on the display to remind the tester to know the test result.
The method may be executed by a control system, and the structure of the control system may refer to a structural block diagram shown in fig. 2, the control system includes an upwind detection subsystem and a fan control subsystem, and the upwind detection subsystem includes: the controller is respectively connected with the output end of the comparator, the input end of the display and the switch control end of the relay, and two ends of a normally open switch of the relay are respectively connected with the power supply and the fan control subsystem; two input ends of the comparator are connected with any two of three-phase output ports of the fan, and the fan control subsystem is connected with the fan.
Based on the control system shown in fig. 2, the controller MCU may be configured to determine whether the fan rotates under the action of the simulated wind force when the fan is not started, and if so, control the switch control end to close the normally open switch of the relay so that the power supply supplies power to the fan control subsystem. Therefore, after the fan control subsystem is powered on, the rotating speed of the fan under the action of the simulated wind force when the fan is not started can be calculated, and the fan is respectively subjected to upwind starting capability test under a plurality of preset gears. The controller and the fan control subsystem can be connected in a wired or wireless mode, and therefore communication is achieved.
It can be understood that whether the final test is successful or the test is failed, after the test is finished, the power supply does not need to supply power to the fan control subsystem, and therefore the controller controls the switch control end to enable the normally open switch of the relay to be disconnected.
It will be appreciated that when the fan is not activated, it is rotating under the influence of the simulated wind, and the port of the fan will output a three-phase voltage W, U, V. If the fan does not rotate, the fan does not have an output signal. According to the point, whether the fan rotates or not can be judged.
In specific implementation, the process of judging whether the fan rotates under the action of the simulated wind power when the fan is not started may include: the method comprises the steps of obtaining three-phase port voltages of the fan, determining output waveforms of any two port voltages in the three-phase port voltages after passing through a comparator, and determining that the fan rotates under the action of simulated wind power if the output waveforms are sawtooth waves formed by alternating high levels and low levels.
That is, any two of the three-phase output ports of the fan are connected to two input terminals of the comparator, so that the comparator outputs a signal obtained by comparing the voltages of the any two output ports. If the signal output by the comparator is a sawtooth wave as shown in fig. 3, it indicates that the fan is rotating at this time. And if the signal output by the comparator is 0 or the comparator does not output a signal, the condition indicates that the fan does not rotate at the moment.
The detection system provided by the invention is applied to a laboratory or a detection room environment, and the upwind starting capability of the direct current fan of the outdoor unit of the air conditioner is detected in a mode of simulating external natural wind by a wind source.
In specific implementation, a first formula can be adopted to calculate the rotating speed of the fan under the action of the simulated wind force when the fan is not started, and the first formula comprises:
R＝1/(T*P)*60
in the formula, R is the rotating speed of the fan under the action of simulated wind power when the fan is not started, T is a half period of the sawtooth waveform, and P is the pole pair number of the fan.
It can be understood that the preset gears may include a low-speed gear, a medium-speed gear and a high-speed gear, and the fan has a certain rotation speed range in each gear. Firstly, testing the upwind starting capability at a low-speed gear, and then testing the upwind starting capability at a medium-speed gear after the test is passed, otherwise, not entering the upwind starting capability test at the medium-speed gear; and after the test at the medium-speed gear passes, the upwind capability test at the high-speed gear is carried out, and when the upwind capability test at the high-speed gear passes, the upwind starting capability test of the fan is wholly passed. It can be seen that the headwind starting capability test is performed according to the sequence of the low-speed gear, the medium-speed gear and the high-speed gear, and the headwind starting capability test of the next gear is performed only after the headwind starting capability test of the previous gear passes.
In a specific implementation, before determining whether the rotation speed is less than the maximum rotation speed corresponding to the preset gear in S110, the S110 may further include: judging whether the rotating speed of the fan under the action of the simulated wind power is less than a preset rotating speed upper limit value or not when the fan is not started; the upper limit value of the preset rotating speed is greater than the maximum rotating speed corresponding to each preset gear; and if so, allowing the step of judging whether the rotating speed is less than the maximum rotating speed corresponding to the preset gear.
It will be appreciated that the fan speed cannot be too high because of power limitations and that if the fan speed is high, heat can be removed as well without having to perform subsequent steps. Therefore, the subsequent upwind starting capability test step is only carried out when the rotating speed of the fan under the action of the simulated wind force is smaller than the preset rotating speed upper limit value when the fan is not started.
Of course, if the upwind starting capability of the fan is also to be tested when the rotating speed of the fan under the action of the simulated wind force is greater than or equal to the preset rotating speed upper limit value when the fan is not started, the rotating speed of the fan under the action of the simulated wind force when the fan is not started can be displayed on the display, so that personnel can adjust the relative position and the relative angle between the wind source of the simulated wind force and the fan, and the rotating speed of the fan under the action of the simulated wind force when the fan is not started is smaller than the preset rotating speed upper limit value.
That is to say, at this time, the distance and the angle between the wind source of the simulated wind power and the fan are adjusted by personnel, so that the rotating speed of the fan under the action of the simulated wind power is smaller than the preset rotating speed upper limit value when the fan is not started, and then the subsequent step of upwind starting capability test is carried out.
In specific implementation, the method provided by the invention can further comprise:
if the rotating speed of the fan under the action of the simulated wind power is greater than or equal to the maximum rotating speed corresponding to the preset gear when the fan is not started, the rotating speed of the fan under the action of the simulated wind power is displayed on the display, so that personnel can adjust the relative position and the relative angle between the wind source of the simulated wind power and the fan, and the rotating speed of the fan under the action of the simulated wind power when the fan is not started is smaller than the maximum rotating speed corresponding to the preset gear and smaller than the upper limit value of the preset rotating speed.
That is to say, if the rotating speed of the fan under the effect of the simulated wind force is greater than or equal to the maximum rotating speed corresponding to the preset gear when the fan is not started, the upwind starting capability test step under the gear cannot be performed at the moment, but the rotating speed at the moment is displayed on the display for reminding, and personnel can adjust the wind source, so that the rotating speed of the fan under the effect of the simulated wind force when the fan is not started is less than the maximum rotating speed corresponding to the preset gear, and the rotating speed of the fan under the effect of the simulated wind force when the fan is not started is also less than the preset rotating speed upper limit value.
It can be seen that the condition that the rotating speed of the fan is less than the preset upper limit value of the rotating speed is a big premise that the whole upwind starting capability test can be entered, the whole upwind starting capability test can be entered only when the rotating speed of the fan is less than the preset upper limit value of the rotating speed, the condition that the rotating speed of the fan is less than the maximum rotating speed corresponding to the preset gear is the premise that the upwind starting capability test of the preset gear is entered, and the upwind starting capability test under the preset gear can be entered only when the condition that the condition is met.
The invention provides a method for detecting the upwind starting capability of a direct current fan of an outdoor unit of an air conditioner, which judges whether the fan rotates under the action of simulated wind power when the fan is not started through an output signal of a comparator, if the fan rotates, the rotating speed of the fan under the action of the simulated wind power when the fan is not started is calculated, the upwind starting capability test of the fan at a plurality of preset gears is respectively carried out on the fan, the test process is carried out according to the sequence from a low-speed gear to a high-speed gear, the upwind starting capability test of the next gear can be entered only after the upwind starting capability test at the previous gear passes, when the upwind starting capability test at the highest gear passes, the whole upwind starting capability test succeeds, and the whole upwind starting capability test fails as long as one-time starting fails, so that the tested fan can meet the working requirements, in an actual application scene, the upwind starting of different gears can be realized under the action of external natural wind force, and further the normal operation of the whole air conditioning system is realized. The detection method provided by the invention has the advantages that the participation of personnel in the whole test process is less, the objectivity of the test result is improved, the human error is reduced, and the detection accuracy is improved.
Further, in order to more intuitively remind people when the upwind start fails, the control system may further include a failure reminder, and the control system may further be configured to: and after the test of the integral upwind starting capability of the fan fails, outputting a high level to a failure prompter connected with the control system so as to light a prompting lamp in the prompter. That is, when the test fails, the person can be notified by lighting a warning lamp in the failure warning device.
In practical implementation, the circuit structure of the failure alarm may be various, and one of the following is provided, but is not limited to the one provided below in practice:
as shown in fig. 4, the failure indicator includes a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor, where: the first triode is an NPN triode, and the second triode is a PNP triode; the base electrode of the first triode is connected with one output end of the control system, the emitting electrode of the first triode is grounded, the collecting electrode of the first triode is connected with one end of a first resistor, the other end of the first resistor is connected to the base electrode of the second triode and one end of a second resistor, and the other end of the second resistor is connected with a preset voltage source; the emitting electrode of the second triode is connected with the preset voltage source, the collecting electrode of the second triode is connected to one end of the fourth resistor and one end of the third resistor, the other end of the fourth resistor is grounded, and the other end of the third resistor is connected with the prompting lamp.
It will be appreciated that it is possible that the controller in the control system is connected to the failure prompter and issues a high level to the failure prompter when the test fails.
The failure prompter may include a first transistor Q1, a second transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, wherein: the first triode Q1 is an NPN type triode, and the second triode Q2 is a PNP type triode; the base electrode of the first triode Q1 is connected with one output end of the control system, the emitter electrode of the first triode Q1 is grounded, the collector electrode of the first triode Q1 is connected with one end of a first resistor, the other end of the first resistor R1 is connected with the base electrode of the second triode Q2 and one end of a second resistor R2, and the other end of the second resistor is connected with a preset voltage source; the emitting electrode of the second triode is connected with the preset voltage source, the collecting electrode of the second triode is connected to one end of a fourth resistor R4 and one end of a third resistor R3, the other end of the fourth resistor is grounded, and the other end of the third resistor is connected with the prompting lamp.
Understandably, when the control system outputs a high level, the base electrode of the first triode is the high level, the first triode is conducted, the preset voltage source, the emitting electrode of the second triode, the base electrode of the second triode, the first resistor, the collecting electrode of the first triode, the emitting electrode of the first triode and the grounding end are conducted, the base electrode voltage of the second triode is pulled down, the second triode is conducted, the preset voltage source, the emitting electrode of the second triode, the collecting electrode of the second triode, the third resistor, the prompting lamp and the grounding end are conducted, and therefore the prompting lamp is turned on. If the control system outputs low level, the two triodes are cut off, and the prompting lamp is off.
After the first triode is conducted, the base electrode of the second triode is pulled down by the first triode, and the collector electrode of the second triode is pulled down by the third resistor, so that the second triode is conducted. When the first triode is cut off, the second resistor pulls the base voltage of the second triode high, so that the second triode is cut off.
In specific implementation, the failure prompter may further include a diode VD and a capacitor C, an anode of the diode is connected to the output terminal of the control system, a cathode of the diode is connected to the warning light, one end of the capacitor is connected to the collector of the second triode, and the other end of the sixth capacitor is grounded.
It can be understood that if the indicator light is short-circuited, the base electrode of the first triode can be rapidly pulled down by the diode, so that the two triodes can enter a cut-off state but cannot be damaged, and when the short-circuit fault disappears, the circuit can restore to normal work. After the normal operation is resumed, the voltage of the cathode of the diode is higher than the voltage of the anode, and therefore the diode is in the off state. Therefore, the two triodes can be protected by arranging one diode. The capacitor is arranged to prevent instantaneous maloperation, prevent static reverse breakdown of the triode and protect the triode.
In specific implementation, the failure prompter further comprises a fuse tube, and the fuse tube is arranged between the junction point of the fourth resistor and the collector electrode of the second triode and the prompting lamp.
That is to say, the warning light is connected to one end of the protective tube, and the other end of the protective tube is connected with the connection point, and the connection point is the connection point of the fourth resistor and the collector of the second triode. The effect that sets up the protective tube is when preventing the warning light short circuit, and the second triode is punctured, so plays further guard action to the second triode.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this disclosure may be implemented in hardware, software, hardware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for testing upwind starting capability of a direct current fan of an outdoor unit of an air conditioner is characterized by comprising the following steps:
judging whether the fan rotates under the action of simulated wind power when the fan is not started, if so, calculating the rotating speed of the fan under the action of the simulated wind power when the fan is not started, and respectively testing the upwind starting capability of the fan under a plurality of preset gears; the method comprises the following steps of firstly, testing the upwind starting capacity of the fan at each preset gear;
s110, judging whether the rotating speed of the fan under the action of the simulated wind power is less than the maximum rotating speed corresponding to the preset gear when the fan is not started; if yes, go to S120;
s120, trying to start the fan, starting timing, and judging whether the fan is started successfully in an upwind state when the timing time reaches a preset time;
s130, if the starting is successful, recording the continuous successful starting times, and judging whether the continuous successful starting times reach the preset times; if the preset times are reached, determining that the upwind starting capability of the fan under the preset gear meets the working requirement, judging whether the preset gear is the highest gear, if so, finishing the test of the overall upwind starting capability of the fan, and displaying that the test of the overall upwind starting capability of the fan passes on the display; if the speed is not the high-speed gear, returning to S110, and testing the upwind starting capability of the next gear of the fan, wherein the rotating speed corresponding to the next gear is higher than that corresponding to the current gear; if the continuous successful starting times are not reached, returning to S120, and carrying out next test on the upwind starting capability of the fan under the preset gear;
and S140, if the fan is not started successfully, determining that the upwind starting capability of the fan at the preset gear does not meet the working requirement, finishing the test of the overall upwind starting capability of the fan, and displaying that the upwind starting capability of the fan at the preset gear is not passed on the display.
2. The method of claim 1, wherein said determining whether said wind turbine is rotating under simulated wind conditions when not activated comprises:
the method comprises the steps of obtaining three-phase port voltages of the fan, determining output waveforms of any two port voltages in the three-phase port voltages after passing through a comparator, and determining that the fan rotates under the action of simulated wind power if the output waveforms are sawtooth waves formed by alternating high levels and low levels.
3. The method of claim 2, wherein the determining whether the fan is successfully started in the upwind state comprises:
acquiring three-phase port voltages of the fan after starting, determining an output waveform of any two port voltages of the three-phase port voltages after passing through a comparator after starting, and if the frequency of the output waveform is greater than a preset threshold value, successfully starting; otherwise, the start fails; the frequency of an output waveform of any two port voltages of the three-phase port voltages before the fan is started after passing through the comparator is lower than the preset threshold value.
4. The method of claim 2, wherein the rotational speed of the wind turbine under the influence of the simulated wind when not activated is calculated using a first formula comprising:
R＝1/(T*P)*60
in the formula, R is the rotating speed of the fan under the action of simulated wind power when the fan is not started, T is a half period of the sawtooth waveform, and P is the pole pair number of the fan.
5. The method according to claim 1, wherein before determining whether the rotation speed is less than the maximum rotation speed corresponding to the preset gear in S110, S110 further comprises:
judging whether the rotating speed of the fan under the action of the simulated wind power is less than a preset rotating speed upper limit value or not when the fan is not started; the upper limit value of the preset rotating speed is greater than the maximum rotating speed corresponding to each preset gear; and if so, allowing the step of judging whether the rotating speed is less than the maximum rotating speed corresponding to the preset gear.
6. The method of claim 5, further comprising:
if the rotating speed of the fan under the action of the simulated wind power is greater than or equal to the maximum rotating speed corresponding to the preset gear when the fan is not started, the rotating speed of the fan under the action of the simulated wind power is displayed on the display, so that personnel can adjust the relative position and the relative angle between the wind source of the simulated wind power and the fan, and the rotating speed of the fan under the action of the simulated wind power when the fan is not started is smaller than the maximum rotating speed corresponding to the preset gear and smaller than the upper limit value of the preset rotating speed.
7. The method of claim 1, wherein the method is performed by a control system, the method further comprising: and after the test of the integral upwind starting capability of the fan fails, outputting a high level to a failure prompter connected with the control system so as to light a prompting lamp in the prompter.
8. The method of claim 7, wherein the failure prompter comprises a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor, wherein: the first triode is an NPN triode, and the second triode is a PNP triode; the base electrode of the first triode is connected with one output end of the control system, the emitting electrode of the first triode is grounded, the collecting electrode of the first triode is connected with one end of a first resistor, the other end of the first resistor is connected to the base electrode of the second triode and one end of a second resistor, and the other end of the second resistor is connected with a preset voltage source; the emitting electrode of the second triode is connected with the preset voltage source, the collecting electrode of the second triode is connected to one end of the fourth resistor and one end of the third resistor, the other end of the fourth resistor is grounded, and the other end of the third resistor is connected with the prompting lamp.
9. The method of claim 8, wherein the failure indicator further comprises a diode and a capacitor, wherein an anode of the diode is connected to the output terminal of the control system, a cathode of the diode is connected to the indicator light, one end of the capacitor is connected to the collector of the second triode, and the other end of the sixth capacitor is grounded.
10. The method of claim 8, wherein the failure prompter further comprises a fuse disposed between a junction of the fourth resistor and the collector of the second transistor and the cue light.
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