CN114183383A - Fan rotating speed control method for avoiding control misalignment caused by sudden change of power output state - Google Patents
Fan rotating speed control method for avoiding control misalignment caused by sudden change of power output state Download PDFInfo
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- CN114183383A CN114183383A CN202010969214.5A CN202010969214A CN114183383A CN 114183383 A CN114183383 A CN 114183383A CN 202010969214 A CN202010969214 A CN 202010969214A CN 114183383 A CN114183383 A CN 114183383A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005070 sampling Methods 0.000 claims abstract description 41
- 230000001276 controlling effect Effects 0.000 claims description 16
- 230000007423 decrease Effects 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 8
- 230000002596 correlated effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000000875 corresponding effect Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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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
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
A method for controlling the rotation speed of fan to avoid the control misalignment caused by the sudden change of power output state includes picking up the output current value of a power supply, judging the change of said output current value in a sampling time, controlling a control signal generating unit to gradually change the current fan control signal to another fan control signal based on the first delay time, and when the change slope is negative, controlling said control signal generating unit to gradually change the current fan control signal to another fan control signal based on the second delay time, and determining the first delay time and the second delay time by said output current value.
Description
Technical Field
The present invention relates to a fan speed control method, and more particularly, to a fan speed control method for avoiding control misalignment caused by sudden change of power output status.
Background
With the development of technology, the rotation speed of a fan in the market can be adjusted according to the output state of a power supply device, that is, when the output current of the power supply device rises, the rotation speed of the fan increases, and when the output current of the power supply device falls, the rotation speed of the fan decreases. In addition, the rotation speed of the conventional fan is immediately changed with the output state of the power supply device, as disclosed in taiwan patent No. TW 201422128A, TW 200826813 a. However, in the prior art, when the output state of the power supply device suddenly changes, the rotation speed of the fan may not be immediately changed due to the signal transmission delay between the electronic components, so that the rotation speed of the fan continuously tracks. Moreover, when the output state of the power supply device is changed continuously, the conventional fan is prone to malfunction, and the control is misaligned. Meanwhile, when the rotation speed of the conventional fan changes suddenly and suddenly with the change of the power supply device, the components are easy to wear.
Disclosure of Invention
The invention mainly aims to solve the problem that the fan control is easy to be misaligned when the power output state suddenly changes.
To achieve the above object, the present invention provides a method for controlling a fan rotation speed to avoid control misalignment caused by sudden change of a power output state, comprising the following steps:
the method comprises the following steps: capturing an output current value of a power supply device; and
step two: judging the change of the output current value in a sampling time, wherein the change slope is a positive value, controlling a control signal generating unit to gradually change a fan control signal output to a fan at present into another fan control signal based on a first delay time, and controlling the control signal generating unit to gradually change the fan control signal output to the fan at present into another fan control signal based on a second delay time when the change slope is a negative value, wherein the first delay time and the second delay time are respectively determined by the output current value.
In one embodiment, the first delay time is inversely related to the output current value.
In one embodiment, the second delay time is positively correlated to the output current value.
In one embodiment, the first step further comprises the substeps of: and defining a heat dissipation basic rotating speed based on the output current value, and generating the fan control signal based on the heat dissipation basic rotating speed.
In one embodiment, the sampling time includes a plurality of sampling intervals, a current average value is calculated based on a plurality of output current values in each sampling interval, and the control signal generating unit is controlled by a change slope of the plurality of current average values in the sampling interval.
In one embodiment, the second step further comprises a substep of: sensing a working temperature, defining a basic requirement of a rotating speed based on the working temperature, and commanding the fan to increase or decrease the speed according to the basic requirement of the rotating speed by the fan control signal.
In one embodiment, the second step further comprises a substep of: and acquiring a temperature variation parameter, wherein the temperature variation parameter is included in the calculation of the first delay time and the second delay time, and the temperature variation parameter is calculated based on a previous sampling temperature and a current sampling temperature.
In one embodiment, the first step further comprises the substeps of: a signal amplifier is used for amplifying the fan control signal.
Through the implementation of the invention, compared with the prior art, the invention has the following characteristics: the invention makes the fan respond to the sudden change of the power output state by establishing the first delay time and the second delay time, so that the control signal generating unit can gradually change the rotating speed of the fan when the current state suddenly changes, thereby avoiding the generation of the fan control misalignment condition. Meanwhile, the fan rotating speed control method can reduce the condition that the fan element is lost due to sudden change of the rotating speed of the fan caused by the power supply state.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
FIG. 1 is a flowchart illustrating the steps of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a cell assembly according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a slope and a sampling time according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a first delay time of a fan rotation speed with pulses according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the slope and the sampling time according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a second delay time of a fan rotation speed with pulses according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a plurality of sampling intervals according to an embodiment of the present invention;
FIG. 8 is a flowchart of the steps of a second embodiment of the present invention;
FIG. 9 is a flowchart of the steps of a third embodiment of the present invention;
FIG. 10 is a schematic diagram of a cell assembly according to a third embodiment of the present invention;
FIG. 11 is a flowchart illustrating the steps of a fourth embodiment of the present invention;
FIG. 12 is a flowchart illustrating the steps of a fifth embodiment of the present invention;
FIG. 13 is a schematic diagram of a cell structure according to a fifth embodiment of the present invention.
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Detailed Description
The present invention is described in detail and technical content with reference to the accompanying drawings, wherein:
referring to fig. 1-2, a method 10 for controlling a rotational speed of a fan according to the present invention is used to avoid a control misalignment caused by a sudden change of a power output state. The present invention will be described in detail later, and the fan speed control method 10 is performed by a fan driving circuit 50. The fan driving circuit 50 is disposed in a power supply device 60, the fan driving circuit 50 is used for controlling at least one fan 70 belonging to the power supply device 60, and the fan driving circuit 50 includes a current sensing unit 51 and a control signal generating unit 52. The current sensing unit 51 is electrically connected to the power supply device 60 and disposed at an output end 61 of the power supply device 60, the current sensing unit 51 is configured to sense an output current value of the power supply device 60, the control signal generating unit 52 is electrically connected to the current sensing unit 51 and the fan 70, the control signal generating unit 52 receives a current information 511 transmitted by the current sensing unit 51, and the current information 511 represents the output current value of the power supply device 60. Then, the control signal generating unit 52 performs modulation and conversion based on the received current information 511, and transmits a fan control signal 521 to the fan 70, thereby controlling the fan 70 to rotate.
Referring to fig. 1 to 7, as mentioned above, the method 10 for controlling the rotational speed of the fan of the present invention includes the following steps:
step one 11, capturing the output current value of the power supply device 60;
step two 12, determining the variation of the output current value in a sampling time 523, wherein the variation slope is a positive value, controlling the control signal generating unit 52 to gradually change the fan control signal 521 currently output to the fan 70 to another fan control signal 521 based on a first delay time 524, and when the variation slope is a negative value, controlling the control signal generating unit 52 to gradually change the fan control signal 521 currently output to the fan 70 to another fan control signal 521 based on a second delay time 525, wherein the first delay time 524 and the second delay time 525 are respectively determined by the output current value.
Specifically, at the beginning of the implementation of the present invention, the current sensing unit 51 is first used to sense the output state of the power supply device 60, so as to capture the output current value of the power supply device 60, and output the current information 511 to the control signal generating unit 52, and then the step two 12 is proceeded. In the second step 12, the control signal generating unit 52 is utilized to determine the change of the output current value within the sampling time 523, where the sampling time 523 indicates the current magnitude indicated by the plurality of current information 511 that the control signal generating unit 52 determines in a certain time segment when the power supply device 60 operates, the control signal generating unit 52 can continuously determine the current change within the sampling time 523 after the power supply device 60 is started, and the control signal generating unit 52 can also determine the current change within the sampling time 523 at intervals after the power supply device 60 is started. Further, based on the current variation of the power supply device 60 and the horizontal time axis representing the current variation of the power supply device 60, the current variation of the power supply device 60 is converted into a trend line 522, as illustrated in fig. 3. When the control signal generating unit 52 determines that the current values indicated by the plurality of current information 511 within the sampling time 523 are increasing, that is, the slope of the current change is a positive value, the control signal generating unit 52 gradually changes the fan control signal 521 currently output to the fan 70 to another fan control signal 521 based on the first delay time 524, wherein the first delay time 524 is determined by the output current value. More specifically, when the control signal generating unit 52 calculates the output current value of the power supply apparatus 60 rising within the sampling time 523, the control signal generating unit 52 adjusts the first delay time 524, and changes the signal output to the fan 70 based on the first delay time 524, so that the fan 70 is changed to receive another fan control signal 521 for operation. In one embodiment, the first delay time 524 is obtained based on a calculation formula of speed-up delay time, which is:
tRise＝tS a×Iout b×KA
wherein, tRiseIs the first deferral time 524, a base time, IoutFor the output current value, a, b are positive or negative rational numbers other than zero, KAIs a constant or a corresponding relation. Also, the reference time differs according to the power supply device 60 and the fan driving circuit 50, and may be set to one second, for example. In another embodiment, the calculation formula of the speed-increasing delay time may also be:
wherein, tRiseIs the first deferral time 524, IoutFor the output current, IrateIs a rated output current, tsFor the reference time, it is understood that the first delay time 524 can be shortened as the output current value increases, i.e., the first delay time 524 is inversely related to the output current value.
In addition, if the control signal generating unit 52 determines that the current magnitude indicated by the plurality of current information 511 within the sampling time 523 is decreasing, that is, the current change slope indicated by the trend line 522 is a negative value, the control signal generating unit 52 gradually changes the fan control signal 521 currently output to the fan 70 to another fan control signal 521 based on the second delay time 525, wherein the second delay time 525 is related to the output current value. More specifically, when the output current value of the power supply apparatus 60 decreases within the sampling time 523 and the control signal generating unit 52 calculates that the output current value decreases, the control signal generating unit 52 adjusts the second delay time 525 and changes the signal output to the fan 70 based on the second delay time 525, so that the fan 70 is changed to receive another fan control signal 521 for operation. In one embodiment, the second deferral time 525 is obtained based on a deceleration deferral time calculation formula, which is:
tFall＝tS a×Iout b×KA
wherein, tFallIs the second deferral time 525, tsIs the reference time, IoutFor the output current value, a, b are positive or negative rational numbers other than zero, KAIs a constant or a corresponding relation. In another embodiment, the calculation formula of the deceleration delay time may also be:
wherein, tFallIs the second deferral time 525, IoutFor the output current, IrateFor the rated output current, tsIs the reference time. Accordingly, the second delay time 525 can be shortened as the output current value decreases, i.e., the second delay time 525 is positively correlated to the output current value.
Accordingly, when the output current value changes, the control signal generating unit 52 controls the fan 70 to change from an initial rotation speed to a target rotation speed, the initial rotation speed and the target rotation speed are not immediately converted and have a transition period, and the control signal generating unit 52 controls the rotation speed of the fan 70 to gradually change in the transition period. Compared with the prior art, the invention can specifically solve the problem that the control of the fan 70 is misaligned due to the sudden change of the output state of the power supply device 60.
In one embodiment, the sampling time 523 includes a plurality of sampling intervals 526, the control signal generating unit 52 can calculate a current average value based on a plurality of current output values in each of the sampling intervals 526, and the fan driving circuit 50 controls the control signal generating unit 52 according to a change slope of the plurality of current average values in the sampling interval 523, so that the control signal generating unit 52 changes another fan control signal 521 transmitted to the fan 70 according to the change slope of the plurality of current average values.
In one embodiment, referring to fig. 8, the first step 11 further includes a sub-step 111: a heat dissipation base speed is defined based on the output current value, and the fan control signal 521 is generated based on the heat dissipation base speed. Specifically, the control signal generating unit 52 can define different heat dissipation basic rotation speeds based on different output current values, for example, the control signal generating unit 52 can pre-store a plurality of heat dissipation basic rotation speeds corresponding to different output current values, and after the control signal generating unit 52 captures different output current values at different sampling times 523, the control signal generating unit 52 can determine the rotation speed of the fan 70 based on the captured output current values and output the fan rotation speed control signal 521 to the fan 70.
On the other hand, referring to fig. 9 and 10 again, in an embodiment, the fan driving circuit 50 further includes a temperature sensing unit 53 disposed inside the power supply device 60, the temperature sensing unit 53 senses an operating temperature inside the power supply device 60, generates temperature information 531 indicating the operating temperature based on the operating temperature, and provides the temperature information 531 to the control signal generating unit 52. The second step 12 of the fan speed control method 10 further includes a sub-step 121: the temperature sensing unit 53 outputs the temperature information 531 to the control signal generating unit 52 after sensing the working temperature, the control signal generating unit 52 defines a basic requirement of a rotation speed based on the working temperature, and the fan control signal 521 enables the fan 70 to increase or decrease the speed according to the basic requirement of the rotation speed. For example, when the current sensing unit 51 does not transmit the current information 511 of the power supply device 60 to the control signal generating unit 52, the control signal generating unit 52 controls the fan 70 to operate at the rotation speed. Thereafter, once the current sensing unit 51 senses that the output current value of the power supply device 60 increases, the control signal generating unit 52 causes the fan 70 to slowly increase based on the rotation speed represented by the basic rotation speed requirement. On the contrary, if the current sensing unit 51 senses that the output current value of the power supply device 60 decreases, the fan 70 is controlled to slowly decrease based on the rotation speed represented by the basic rotation speed requirement.
In another embodiment, referring to fig. 11, the second step 12 further includes a sub-step 122: a temperature variation parameter is obtained and incorporated into the calculation of the first delay time 524 and the second delay time 525, wherein the temperature variation parameter can be calculated based on a previous sampling temperature and a current sampling temperature. In one embodiment, the temperature variation parameter is calculated by the following formula:
KT＝T0 c×T1 d×KB
wherein, KTFor the temperature variation parameter, T0Is the last sampling temperature, T1For the current sample temperature, c, d are positive or negative rational numbers other than zero, KBIs a constant or a corresponding relation. In another embodiment, the formula of the temperature variation parameter can also be expressed as:
wherein, KTFor the temperature variation parameter, T0Is the last sampling temperature, T1Is the current sampling temperature. The control signal generating unit 52 is arranged to countAfter calculating the temperature variation parameter, the control signal generating unit 52 generates KT×tRiseAnd KT×tFallAs a parameter for controlling the rotation speed of the fan 70.
Still another aspect, referring to fig. 12 and 13, the fan driving circuit 50 further includes a signal amplifier 54, wherein the signal amplifier 54 is electrically connected to the control signal generating unit 52 and the fan 70. Accordingly, the second step 12 of the fan speed control method 10 of the present invention further includes a substep 123 of amplifying the fan control signal 521 by the signal amplifier 54, thereby driving the fan 70.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A method for controlling the rotating speed of a fan for avoiding control misalignment caused by sudden change of the output state of a power supply is characterized by comprising the following steps:
the method comprises the following steps: capturing an output current value of a power supply device; and
step two: judging the change of the output current value in a sampling time, wherein the change slope is a positive value, controlling a control signal generating unit to gradually change a fan control signal output to a fan at present into another fan control signal based on a first delay time, and when the change slope is a negative value, controlling the control signal generating unit to gradually change the fan control signal output to the fan at present into another fan control signal based on a second delay time, wherein the first delay time and the second delay time are respectively determined by the output current value.
2. The method as claimed in claim 1, wherein the first delay time is inversely related to the output current value.
3. The method as claimed in claim 2, wherein the second delay time is positively correlated to the output current value.
4. The method as claimed in claim 3, wherein the step one further comprises a sub-step of: and defining a heat dissipation basic rotating speed based on the output current value, and generating the fan control signal based on the heat dissipation basic rotating speed.
5. The method as claimed in any one of claims 1 to 4, wherein the sampling time includes a plurality of sampling intervals, a current average value is calculated based on a plurality of output current values in each sampling interval, and the control signal generating unit is controlled according to a variation slope of the plurality of current average values in the sampling time.
6. The method as claimed in claim 5, wherein the second step further comprises a sub-step of: sensing a working temperature, defining a basic requirement of a rotating speed based on the working temperature, and commanding the fan to increase or decrease the speed according to the basic requirement of the rotating speed by the fan control signal.
7. The method as claimed in claim 6, wherein the second step further comprises a sub-step of: and acquiring a temperature variation parameter, wherein the temperature variation parameter is included in the calculation of the first delay time and the second delay time, and the temperature variation parameter is calculated based on a previous sampling temperature and a current sampling temperature.
8. The method for controlling the rotation speed of a fan to avoid the control misalignment caused by the sudden change of the power output state as claimed in any one of claims 1 to 4, wherein the second step further comprises a sub-step of: sensing a working temperature, defining a basic requirement of a rotating speed based on the working temperature, and commanding the fan to increase or decrease the speed according to the basic requirement of the rotating speed by the fan control signal.
9. The method as claimed in claim 8, wherein the second step further comprises a sub-step of: and acquiring a temperature variation parameter, wherein the temperature variation parameter is included in the calculation of the first delay time and the second delay time, and the temperature variation parameter is calculated based on a previous sampling temperature and a current sampling temperature.
10. The method for controlling the rotation speed of a fan to avoid the control misalignment caused by the sudden change of the power output state as claimed in any one of claims 1 to 4, wherein the second step further comprises a sub-step of: and acquiring a temperature variation parameter, wherein the temperature variation parameter is included in the calculation of the first delay time and the second delay time, and the temperature variation parameter is calculated based on a previous sampling temperature and a current sampling temperature.
11. The method for controlling the rotation speed of a fan to avoid the control misalignment caused by the sudden change of the power output state as claimed in any one of claims 1 to 4, wherein the first step further comprises the sub-steps of: a signal amplifier is used for amplifying the fan control signal.
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| CN202010969214.5A CN114183383A (en) | 2020-09-15 | 2020-09-15 | Fan rotating speed control method for avoiding control misalignment caused by sudden change of power output state |
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| CN202010969214.5A CN114183383A (en) | 2020-09-15 | 2020-09-15 | Fan rotating speed control method for avoiding control misalignment caused by sudden change of power output state |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002171788A (en) * | 2000-12-05 | 2002-06-14 | Jianzhun Electric Mach Ind Co Ltd | Motor for radiation fan having revolution controlled by temperature |
| TW499637B (en) * | 1999-07-19 | 2002-08-21 | Winbond Electronics Corp | Method and apparatus of rotation speed control for heat dissipation fan |
| CN101025163A (en) * | 2006-02-25 | 2007-08-29 | 鸿富锦精密工业（深圳）有限公司 | Fan rotating-speed control system and method |
| CN102374185A (en) * | 2010-08-16 | 2012-03-14 | 全汉企业股份有限公司 | Fan rotating speed control method |
| CA2986407A1 (en) * | 2016-12-06 | 2018-06-06 | GE Lighting Solutions, LLC | Method and system for controlling fan rotating speed of led lamp, and led lamp thereof |
| CN110985428A (en) * | 2019-12-14 | 2020-04-10 | 珠海格力电器股份有限公司 | Cooling fan drive circuit and cooking utensil |
| CN111486121A (en) * | 2019-01-23 | 2020-08-04 | 旺玖科技股份有限公司 | Fan operation state diagnosis device and method |
-
2020
- 2020-09-15 CN CN202010969214.5A patent/CN114183383A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW499637B (en) * | 1999-07-19 | 2002-08-21 | Winbond Electronics Corp | Method and apparatus of rotation speed control for heat dissipation fan |
| JP2002171788A (en) * | 2000-12-05 | 2002-06-14 | Jianzhun Electric Mach Ind Co Ltd | Motor for radiation fan having revolution controlled by temperature |
| CN101025163A (en) * | 2006-02-25 | 2007-08-29 | 鸿富锦精密工业（深圳）有限公司 | Fan rotating-speed control system and method |
| CN102374185A (en) * | 2010-08-16 | 2012-03-14 | 全汉企业股份有限公司 | Fan rotating speed control method |
| CA2986407A1 (en) * | 2016-12-06 | 2018-06-06 | GE Lighting Solutions, LLC | Method and system for controlling fan rotating speed of led lamp, and led lamp thereof |
| CN111486121A (en) * | 2019-01-23 | 2020-08-04 | 旺玖科技股份有限公司 | Fan operation state diagnosis device and method |
| CN110985428A (en) * | 2019-12-14 | 2020-04-10 | 珠海格力电器股份有限公司 | Cooling fan drive circuit and cooking utensil |
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