CN113187753B - Fan control device and lamp - Google Patents
Fan control device and lamp Download PDFInfo
- Publication number
- CN113187753B CN113187753B CN202110469700.5A CN202110469700A CN113187753B CN 113187753 B CN113187753 B CN 113187753B CN 202110469700 A CN202110469700 A CN 202110469700A CN 113187753 B CN113187753 B CN 113187753B
- Authority
- CN
- China
- Prior art keywords
- fan
- module
- voltage
- driving
- control module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/61—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by control arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The control device comprises a control module, a driving module, a capacitance compensation module and a detection module, wherein the detection module sends a first indication signal to the control module when the fan fails to start according to initial starting voltage; the control module determines a target compensation voltage under the indication of the first indication signal and adjusts the output voltage of the capacitance compensation module to the target compensation voltage, so that the driving module conducts the negative electrode of the fan with the ground according to the target compensation voltage, a voltage difference is generated between the positive electrode and the negative electrode of the fan, and the fan is started. The fan control circuit that this application provided can lead to under the fan condition of the required voltage increase that starts of fan ageing, thereby can make drive module switch on the fan that starts through the mode that carries out voltage compensation for drive module, has solved the problem that the fan can't start.
Description
Technical Field
The application relates to the technical field of fan control, in particular to a fan control device and a lamp.
Background
Lamps and lanterns are various, its frequency of utilization in daily life is also very high, in some application scenarios, lamps and lanterns can generate heat after using a period of time, when the temperature of lamps and lanterns reaches certain value, lamps and lanterns just can't normal use, so just need the fan for the lamps and lanterns heat dissipation, but most of fans are after using a period of time, because its unable normal start-up that leads to it of its internal coil ageing, the fan will directly cancel the speed governing change function and full speed rotation, or improve drive fan drive voltage, make the fan normal operating voltage scope reduce, be close to the biggest normal operating voltage promptly, thereby make the fan appear "stealing and stopping" phenomenon under lower normal drive voltage, make the radiating effect of fan relatively poor.
Disclosure of Invention
Based on this, this application provides a fan controlling means and lamps and lanterns, can control the fan and start the commentaries on classics under the condition that the fan appears ageing.
A first aspect of the present application provides a control device of a fan, the control device including: a control module, a driving module, a capacitance compensation module and a detection module,
the detection module is used for sending a first indication signal to the control module when the fan fails to start according to the initial starting voltage;
the control module is used for determining a target compensation voltage under the indication of the first indication signal;
the control module is further configured to control the output voltage of the capacitance compensation module to be adjusted to a target compensation voltage;
the driving module is used for conducting the negative electrode of the fan with the ground according to the target compensation voltage so as to drive the fan to start.
In one embodiment, the capacitance compensation module comprises: a dial switch and a capacitor, the control module is connected with the capacitor through the dial switch,
the dial switch is used for controlling the on-off of the capacitor and the driving module according to the level signal of the control module;
the capacitor is used for inputting the target compensation voltage for the driving module under the condition of being connected with the driving module.
In one embodiment, the driving module includes: the signal input end of the control module is connected with the first end of the first resistor, the first end of the second resistor is connected with the second end of the first resistor in parallel and then connected with the grid of the N-type field effect transistor, the drain electrode of the N-type field effect transistor is connected with the anode of the diode and the first end of the inductor respectively, the second end of the inductor is connected with the output end of the capacitor and the cathode of the fan respectively, and the power supply end of the control module is connected with the cathode of the diode and the anode of the fan respectively.
In one embodiment, the capacitor is specifically configured to provide a target compensation voltage for the N-type field effect transistor when the capacitor is connected to the driving module, so that a drain of the N-type field effect transistor is connected to a source of the N-type field effect transistor, and a negative electrode of the fan is connected to ground.
In one embodiment, the control device further comprises: the output end of the detection module is connected with the first end of the third resistor, the second end of the fourth resistor is connected with the fan after being connected with the second end of the third resistor in parallel, and the first end of the fourth resistor is connected with the power supply end of the control module.
In one embodiment, the control module comprises: a driving signal compensation unit for compensating the driving signal,
the detection module is also used for detecting the rotating speed of the fan after the fan is started successfully, and sending a second indication signal to the control module according to a comparison result when the rotating speed of the fan is compared with a preset rotating speed threshold value;
the control module is also used for adjusting the duty ratio of the driving signal output by the control module through the driving signal compensation unit under the indication of the second indication information and inputting the adjusted driving signal to the driving module;
and the driving module is used for inputting corresponding voltage to the fan according to the adjusted driving signal so as to adjust the rotating speed of the fan.
In one embodiment, the driving signal compensation unit comprises a duty ratio adjusting button and an indicator lamp,
the duty ratio adjusting button is used for adjusting the duty ratio of the driving signal;
the indicator light is used for indicating the duty ratio of the adjusted driving signal.
In one embodiment, the control module further comprises: and the signal conversion unit is used for carrying out protocol conversion on the data detected by the detection module.
In one embodiment, the control device further comprises: and the display module is used for receiving the data after the protocol conversion and displaying the data.
A second aspect of the application provides a luminaire comprising a fan control apparatus according to any one of the preceding claims.
The control device comprises a control module, a driving module, a capacitance compensation module and a detection module, wherein the detection module sends a first indication signal to the control module when the fan fails to start according to initial starting voltage; the control module determines a target compensation voltage under the indication of the first indication signal, and adjusts the output voltage of the capacitance compensation module to the target compensation voltage, so that the driving module conducts the negative electrode of the fan with the ground according to the target compensation voltage, a voltage difference is generated between the positive electrode and the negative electrode of the fan, and the fan is started. The application provides a fan control circuit can lead to under the required condition of the voltage increase that starts of fan at the fan is ageing, thereby can make drive module switch on the fan that starts through the mode of carrying out voltage compensation for drive module, has solved the unable problem that starts the commentaries on classics of fan.
Drawings
FIG. 1 is a diagram of an environment in which a fan control apparatus according to an embodiment may be used;
FIG. 2 is a block diagram of a fan control apparatus according to an embodiment;
FIG. 3 is a block diagram showing the construction of a fan control apparatus according to another embodiment;
FIG. 4 is a block diagram of a fan control apparatus according to another embodiment;
FIG. 5 is a block diagram of a fan control apparatus according to another embodiment;
FIG. 6 is a block diagram showing the construction of a fan control apparatus according to another embodiment;
fig. 7 is a block diagram of a driving signal compensation unit in another embodiment.
Description of reference numerals:
100. a light fixture; 200. A fan; 11. A control module;
111. a drive signal compensation unit; 112. A signal conversion unit; 12. A drive module;
121. a first resistor; 122. A second resistor; 123. An N-type field effect transistor;
124. a diode; 125. An inductance; 13. A capacitance compensation module;
131. a dial switch; 132. A capacitor; 14. A detection module;
15. a third resistor; 16. A fourth resistor; 17. And a display module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
The fan control device provided by the application can be applied to the application environment shown in figure 1. The fans 200 may commonly radiate heat for one lamp 100, the starting voltages of the fans may be the same or different, or different fans 200 may radiate heat for different lamps 100; it should be noted that the fan 200 may also be used to dissipate heat for other devices, which is not limited in this application.
In one embodiment, as shown in fig. 2, there is provided a fan control apparatus comprising: the fan starting circuit comprises a control module 11, a driving module 12, a capacitance compensation module 13 and a detection module 14, wherein the detection module 14 is used for sending a first indication signal to the control module 11 when the fan fails to start according to initial starting voltage; a control module 11, configured to determine a target compensation voltage under the indication of the first indication signal; the control module 11 is further configured to control the output voltage of the capacitance compensation module 13 to be adjusted to a target compensation voltage; and the driving module 12 is used for conducting the negative electrode of the fan with the ground according to the target compensation voltage so as to drive the fan to start.
Wherein, detection module 14 is connected with the fan, and it can detect parameters such as rotational speed, voltage, electric current, power of fan, and detection module 14 for example can be: a tachometer, a tachosensor, a voltage detection circuit, a current detection circuit, or the like, and the detection module 14 may be, for example, a tachometer, a tachosensor, a voltage detection circuit, a current detection circuit, or the like. The detection module 14 is further connected to the control module 11, and the detection module 14 may further generate an indication signal according to the detected parameter, and send the indication signal to the control module 11, so that the control module 11 performs a corresponding operation according to the indication signal, where the operation may be, for example, determining the compensation voltage, determining the target duty cycle, and the like. The control module 11 may be a controller, a control chip, a control circuit, etc., for example, the control module 11 is a single chip. The control module 11 is connected to the driving module 12, the control module 11 can generate a driving signal to control the driving module 12 to generate a corresponding voltage, the driving signal may be, for example, a PWM (Pulse Width Modulation) signal, and the PWM signal can modulate a fet in the driving module 12 according to a change of a corresponding duty ratio to change a conduction time of the fet, so as to change an output voltage of the driving module 12, and further change a rotation speed of the fan. When the PWM duty ratio is low, the fet is turned off, the driving module 12 cannot form a ground loop, and the voltage of the negative electrode of the fan is the same as the voltage of the positive electrode of the fan, so that there is no voltage difference between the positive electrode and the negative electrode of the fan, and the fan will not rotate. When the PWM duty ratio is high, the field effect tube is conducted, the voltage of the negative electrode of the fan is reduced because of the conduction of the field effect tube, and if the conduction time of the field effect tube is long enough, a large enough voltage difference can be formed at two ends of the fan, so that the fan is started; and in one PWM cycle time, the PWM duty ratio is high and low, and the on-time and the off-time of the field effect tube correspond to the PWM duty ratio. The field effect transistor on-time and off-time correspond to a plurality of periods within a plurality of PWM period time, i.e. the field effect transistor is switched on and off without stop. The capacitance compensation module 13 prolongs the on-time of the field effect transistor through capacitance charging and discharging, so that the time for lowering the negative electrode voltage of the fan is increased, and negative compensation of the driving voltage for the fan is realized. Meanwhile, under the condition that the input PWM duty ratio is not changed, the capacitance value compensated by the capacitance compensation module 13 is continuously increased, the compensation voltage is overlapped and increased, when the capacitance is increased to a certain value, the charging and discharging time of the capacitance reaches a saturated state, the PWM duty ratio is increased at the moment, the conduction time of the field effect tube is increased, the voltage pull-down time of the negative electrode of the fan is continuously increased, the time of the voltage difference of the two ends of the fan is continuously increased, and then the fan can continuously rotate to realize positive compensation of the driving voltage of the fan.
The driving module 12 may be a circuit, a component, a device, or the like, and when the driving module 12 is a circuit, it may be a circuit formed by combining components such as a resistor, a fet, a diode, and an inductor according to a predetermined connection relationship, which is not limited in this application.
The detecting module 14 may send a first indication signal to the control module 11 when the rotation speed of the fan is detected to be zero by the rotation speed measuring instrument. Because the normal working voltage of the fan in the 12V fan specification is 6V-12V under the normal condition, and the normal working voltage of the fan in the 24V fan specification is 10V-24V. When the output voltage of the driving module of the fan with the 12V specification is detected to be 6V, if the fan normally rotates, the duty ratio (for example, 15.60%) of the driving signal input by the control module for the driving module is the duty ratio of the driving signal required by the lowest normal operating voltage of the fan with the 12V specification. When detecting that the output voltage of the driving module of the fan with the 24V control specification is 10V, if the fan rotates normally, the duty ratio (for example, 7.82%) of the driving signal input by the control module for the driving module at the moment is the duty ratio of the driving signal required by the lowest normal operating voltage of the fan with the 24V specification.
The control module 11 may obtain an initial start-up voltage of the fan from the detection module 14 according to the first indication signal, for example, the initial start-up voltage is 6V, or the detection unit of the control module 11 itself detects the initial start-up voltage of the fan, because the voltage of the positive pole of the fan is known, the initial start-up voltage is a voltage difference between the positive pole of the fan and the negative pole of the fan, the voltage of the negative pole of the fan can be calculated, the voltage of the negative pole of the fan is equal to an equivalent voltage of an output waveform of the driving module 12, and because an input waveform of the driving module 12 is in the same direction as an output waveform of the driving module 12, the equivalent voltage of the input waveform of the driving module 12 can be determined, that is, the input voltage of the driving module 12 is determined, and then the target compensation voltage of the driving module 12 can be determined. The control module 11 may also determine a duty ratio of a driving signal input to the driving module 12 by the control module 11 according to the first indication signal, and determine a voltage equivalent to the driving signal according to the duty ratio of the driving signal, that is, determine an input voltage of the driving module 12, so as to determine a target compensation voltage of the driving module 12. The memory of the control module 11 may be corresponding information or a corresponding table in which the duty ratio of the driving signal and the voltage are stored in advance, the control module 11 may obtain the input voltage of the driving module 12, for example, 5V from the corresponding information or the corresponding table according to the duty ratio of the output driving signal, because the voltage cannot drive the driving module 12 to be turned on, the voltage needs to be increased, for example, 6V needs to be increased, then 1V, which is a difference between 6V and 5V, needs the capacitance compensation module 13 to compensate, and 1V is the target compensation voltage determined by the control module 11.
Under the condition that the target compensation voltage is determined, because the value of the capacitor which can be accessed in the circuit is known, the quantity of the capacitors which need to be accessed and the capacitance value of the accessed capacitor can be determined according to the relation between the voltage and the capacitor. The control module 11 may input a corresponding level signal to the capacitance compensation module 13 to access the corresponding capacitor 132, so as to adjust the output voltage of the capacitance compensation module 13 to a target compensation voltage, and after the target compensation voltage is input to the driving module 12, the input voltage of the driving module 12 is increased and then can be conducted, so that the negative electrode of the fan is conducted with the ground, a voltage difference is generated between the positive electrode and the negative electrode of the fan, and the fan is turned on. It should be noted that the amount of the input voltage that needs to be adjusted to the driving module 12 may be determined by experiments or user experience, and the method determined by the experiments may be: firstly, accessing a capacitor 132 to observe whether the fan rotates, if not, connecting a capacitor 132 in parallel to observe whether the fan rotates, and so on; it is also possible to determine the target compensation voltage directly after determining the input voltage of the driving module 12 according to the experience of the user, so as to determine the number of the access capacitors 132 and the capacitance value of the access capacitor 132, which is not limited in this application.
The application provides a fan control device which comprises a control module, a driving module, a capacitance compensation module and a detection module, wherein the detection module sends a first indication signal to the control module when a fan fails to start according to initial starting voltage; the control module determines a target compensation voltage under the indication of the first indication signal and adjusts the output voltage of the capacitance compensation module to the target compensation voltage, so that the driving module conducts the negative electrode of the fan with the ground according to the target compensation voltage, a voltage difference is generated between the positive electrode and the negative electrode of the fan, and the fan is started. The application provides a fan control circuit can lead to under the required condition of the voltage increase that starts of fan at the fan is ageing, thereby can make drive module switch on the fan that starts through the mode of carrying out voltage compensation for drive module, has solved the unable problem that starts the commentaries on classics of fan.
In one embodiment, as shown in fig. 3, the embodiment shown in fig. 3 is one possible structure of the capacitance compensation module 13, and the capacitance compensation module 13 includes: the control module 11 is connected with the capacitor 132 through the dial switch 131, and the dial switch 131 is used for controlling the on-off of the capacitor 132 and the driving module 12 according to a level signal of the control module 11; and a capacitor 132 for inputting the target compensation voltage to the driving module 12 when the driving module 12 is switched on.
The number of the dial switches 131 and the capacitors 132 may be at least one, and there may be a plurality of dial switches 131 and a plurality of capacitors 132, that is, one dial switch 131 controls on/off of one capacitor 132 and the driving module 12. The capacitance values of the plurality of capacitors 132 may be the same or different. A plurality of capacitors 132 are connected in parallel in the circuit. The capacitance compensation module 13 may further include only one capacitance 132 with adjustable capacitance, which is not limited in this application.
The signal receiving end of the dial switch 131 is connected to the level signal output end of the control module 11, the output end of the dial switch 131 is connected to one end of the capacitor 132, and the other end of the capacitor 132 is connected to the driving module 12. When the control module 11 inputs a high level signal to the dial switch 131, the dial switch 131 controls to turn on the corresponding capacitor 132 and the driving module 12, so that a voltage difference is generated between two ends of the capacitor 132, the capacitor 132 releases charges to the driving module 12, and a compensation voltage is provided for the driving module 12, so that the driving module 12 is turned on. On the contrary, the control module 11 sends a low level signal to the dial switch 131 to prohibit the capacitor 132 controlled by the dial switch 131 from accessing the driving module 12. It should be noted that when the capacitor 132 is disconnected from the driving module 12, there is no voltage difference across the capacitor 132, and the capacitor 132 is in a charging state.
Exemplarily, the control module 11 determines, according to the duty ratio of the output PWM signal, that the current input voltage of the driving module 12 is 4.5V and the fan is not started, and increases the input voltage of the driving module 12 from 4.5V to 6V by connecting two capacitors 132 of 4.7uF in parallel, so that the driving module 12 is turned on, and thus the negative electrode of the fan is turned on with the ground, a voltage difference is generated between the positive electrode and the negative electrode of the fan, and the fan is started.
The application provides a fan control device, the capacitance compensation module in the device includes dial switch and electric capacity, and dial switch switches on or breaks off with drive module according to drive module's level signal control and the electric capacity that this dial switch corresponds, can be accurate carry out voltage compensation to drive module, and operation logic is simple, and maneuverability is strong.
In one embodiment, as shown in fig. 4, the embodiment shown in fig. 4 is one possible configuration of a drive module 12, the drive module 12 comprising: the fan control circuit comprises a first resistor 121, a second resistor 122, an N-type field effect transistor 123, an inductor 125 and a diode 124, wherein a signal input end of the control module 11 is connected with a first end of the first resistor 121, a first end of the second resistor 122 is connected with a second end of the first resistor 121 in parallel and then connected with a grid electrode of the N-type field effect transistor 123, a drain electrode of the N-type field effect transistor 123 is respectively connected with an anode of the diode 124 and a first end of the inductor 125, a second end of the inductor 125 is respectively connected with an output end of a capacitor 132 and a cathode of a fan, and power supply ends of the control module 11 are respectively connected with a cathode of the diode 124 and an anode of the fan.
The first resistor 121 is a signal resistor for connecting a driving signal of the control module 11 to the N-type fet 123, and the second resistor 122 is a pull-down resistor for resisting high-level interference. When the waveform of the driving signal input by the control module 11 is at the wave trough, the gate-source voltage and the drain-source voltage of the N-type field effect transistor 123 are both 0V, that is, the N-type field effect transistor 123 is currently in a cut-off state, that is, the drain and the source of the N-type field effect transistor 123 are not conducted, there is no voltage difference between the positive and negative electrodes of the fan, and the fan is stationary; when the waveform of the driving signal input by the control module 11 is at the peak, the gate-source voltage and the drain-source voltage of the N-type fet 123 are not equal to 0V, i.e., the N-type fet 123 is currently in a conducting state, i.e., the drain and the source of the N-type fet 123 are conducting. Under the condition that the drain electrode and the source electrode of the N-type field effect transistor 123 are conducted, the negative electrode of the fan is communicated with the ground through the N-type field effect transistor 123, namely, a voltage difference is generated between the positive electrode and the negative electrode of the fan, and the fan can rotate. The N-type fet 123 performs inversion processing on the driving signal input by the control module 11, that is, performs inversion processing on the waveform of the driving signal, and outputs the waveform subjected to the inversion processing from the drain, and the N-type fet 123 is connected to the inductor 125, and the inductor 125 can stabilize the output waveform of the N-type fet 123. The other end of the inductor 125 is connected to the negative electrode of the fan, so that the voltage at the negative electrode of the fan is consistent with the voltage output by the drain of the N-type fet 123. The positive pole of fan is connected with the power end of control module 11, and the anodal voltage of fan is a constant value, and the voltage of fan negative pole changes along with the change from crest to trough to crest again of drain electrode output waveform of N type field effect transistor 123, so the voltage difference between the positive pole of fan and the fan negative pole is occasionally not, nevertheless because electric capacity 132 carries out voltage compensation for N type field effect transistor 123, can prolong the fan from rotating to stationary time, has avoided the phenomenon appearance that the fan suddenly stopped. One end of the diode 124 is connected to the power source terminal of the control module 11, so as to prevent the output voltage of the control module 11 from breaking down the N-type fet 123.
The application provides a fan controlling means, drive module among the device is connected according to predetermined relation of connection by N type field effect transistor, resistance, inductance, diode, and the logic control of circuit is simple, and circuit structure is simple, and the strong operability, and has set up protection architecture for the circuit, can protect the fan, prolongs the life of fan, has ensured the security in the use.
In one embodiment, which is a possible implementation of the function of the capacitor 132 in the capacitance compensation module 13, the capacitor 132 in the capacitance compensation module 13 is specifically configured to provide the target compensation voltage for the N-type fet 123 when being connected to the driving module 12, so that the drain of the N-type fet 123 is connected to the source of the N-type fet 123 to conduct the negative electrode of the fan to the ground.
The capacitor 132 may be a plurality of capacitors 132 connected in parallel, or may be a capacitor 132 with a variable value of the capacitor 132, which is not limited in this application. After the control module 11 inputs a high level signal to the dial switch 131 for controlling the capacitor 132, the capacitor 132 is connected to the driving module 12, and since the output end of the capacitor 132 is connected to the drain of the N-type fet 123 through the inductor 125, the capacitor 132 can provide a compensation voltage for the N-type fet 123 to reduce the resistance inside the N-type fet 123, so that the drain and the source of the N-type fet 123 are connected to each other, and the negative electrode of the fan is connected to the ground, a voltage difference is formed between the positive electrode and the negative electrode of the fan, and the fan rotates.
The application provides a fan controlling means, electric capacity among this fan controlling means can provide compensating voltage for the N type field effect transistor among the drive module, can solve because of the long inside ageing of N type field effect transistor live time, lead to the conduction voltage grow between the drain electrode of N type field effect transistor and the source electrode, make behind the same PWM signal before the grid input for N type field effect transistor, the problem that the fan can't be started, the voltage of starting to change of fan has been reduced, the normal use of fan has been guaranteed.
In one embodiment, continuing with fig. 4, the control device further comprises: the output end of the detection module 14 is connected with the first end of the third resistor 15, the second end of the fourth resistor 16 is connected with the second end of the third resistor 15 in parallel and then connected with the fan, and the first end of the fourth resistor 16 is connected with the power supply end of the control module 11.
The third resistor is a signal resistor, and the rotating speed waveform fed back by the fan is transmitted to the control module through the third resistor; the fourth resistor is a pull-up resistor, and stabilizes the high level amplitude of the rotating speed waveform fed back by the fan at a fixed value, for example, 5V.
In one embodiment, as shown in fig. 5, which is one possible structure of the control module 11, the control module 11 includes: the driving signal compensation unit 111 and the detection module 14 are further configured to detect a rotation speed of the fan after the fan starts to rotate successfully, and send a second indication signal to the control module 11 according to a comparison result when the rotation speed of the fan is compared with a preset rotation speed threshold; the control module 11 is further configured to adjust a duty ratio of a driving signal output by the control module 11 through the driving signal compensation unit 111 under the indication of the second indication information, and input the adjusted driving signal to the driving module 12; and the driving module 12 is configured to input a corresponding voltage to the fan according to the adjusted driving signal to adjust the rotation speed of the fan.
The control module 11 controls the driving module 12 to provide voltage for the cathode of the fan by inputting a driving signal to the driving module 12, so that a voltage difference is generated between the anode and the cathode of the fan, and the fan is rotated. The drive signal may be a PWM signal, which may be a square wave. The control module 11 changes the output voltage of the N-type fet 123, i.e., the voltage of the cathode of the fan, by changing the duty ratio of the PWM signal, and further can change the voltage difference between the anode of the fan and the cathode of the fan, and because the working voltage of the fan is equal to the voltage difference between the anode of the fan and the cathode of the fan, the control module 11 can change the working voltage of the fan by changing the duty ratio of the PWM signal, thereby changing the rotation speed of the fan. The duty ratio of the driving signal is adjusted by the driving signal compensation unit 111 of the control module 11, and may be adjusted according to a preset step, or may be adjusted according to a preset corresponding relationship between the duty ratio of the driving signal and the voltage, and the duty ratio of the driving signal is increased, or the duty ratio of the driving signal is decreased, so that the duty ratio of the high level of the output waveform of the driving signal is increased, and the input voltage of the N-type field effect transistor 123 is increased; conversely, the duty ratio of the driving signal is decreased, the duty ratio of the high level of the driving signal output waveform is decreased, and the input voltage of the N-type fet 123 is decreased.
After the fan starts to rotate successfully, the detection module 14 may also detect the rotation speed of the fan from time to time through a rotation speed measuring instrument, a rotation speed sensor, and the like, where the rotation speed may be the rotation speed of the fan at a certain moment, or the average rotation speed of the fan within a preset time period, which is not limited in this application. The preset rotation speed threshold may be determined according to the rotation speed detected by the fan in the normal operating state, and when the detection module 14 detects that the rotation speed of the fan is less than the preset rotation speed threshold, it may indicate that the fan may be in an illegal use state or the fan voltage is too low to ensure the normal operation of the fan, so that the control module 11 is required to adjust the duty ratio of the driving signal output by the control module 11 through the driving signal compensation unit 111 under the indication of the second indication information, where the adjustment may be to increase the duty ratio of the driving signal, decrease the output voltage of the drain of the N-type field effect transistor 123, decrease the voltage of the cathode of the fan, increase the voltage difference between the anode and the cathode of the fan, increase the operating voltage loaded on the fan, and increase the rotation speed of the fan. Alternatively, when the detecting module 14 detects that the rotation speed of the fan is greater than the preset rotation speed threshold, it may indicate that the rotation speed of the fan is too high, and the noise generated by the too high rotation speed of the fan is also relatively large, so that in some usage scenarios, such as a silent place of a news studio, this situation must be avoided. Therefore, the control module 11 is required to adjust the duty ratio of the driving signal output by the control module 11 through the driving signal compensation unit 111 under the indication of the second indication information, where the adjustment may be to decrease the duty ratio of the driving signal, increase the output voltage of the drain of the N-type fet 123, increase the negative voltage of the fan, decrease the voltage difference between the positive and negative electrodes of the fan, decrease the working voltage loaded on the fan, decrease the rotation speed of the fan, and decrease the noise.
Meanwhile, when a plurality of fans radiate heat for the same heating device (for example, the lamp 100), because the plurality of fans may have different specification models, rated currents, batches, service times and the like, the starting voltages of the plurality of fans are different, after the plurality of fans start, the difference of the output voltages of the plurality of fans can be adjusted to a very small range by adjusting the duty ratio of the PWM signal, so that the rotating speeds of the plurality of fans are basically kept consistent, uniform heat radiation for the lamp 100 can be realized, and the phenomenon that noise superposition causes larger noise due to mutual influence of noise of the plurality of fans is avoided.
The application provides a fan control device, control module in the device can adjust the duty cycle of the drive signal of control module output under the instruction of pilot signal through drive signal compensation unit to change the operating voltage of fan, and then adjust the rotational speed of fan, in order to satisfy the application to the fan in different occasions, make the use of fan more nimble, can solve the problem that the fan stopped secretly simultaneously.
In one embodiment, as shown in fig. 7, the driving signal compensation unit 111 includes a duty ratio adjustment button for adjusting a duty ratio of the driving signal and an indicator light; and the indicator light is used for indicating the duty ratio of the adjusted driving signal.
The duty ratio adjusting button can comprise an increasing button and a decreasing button, the duty ratio of the driving signal output by the control module 11 is adjusted and increased to a preset value by operating the increasing button, and the duty ratio of the driving signal output by the control module 11 is adjusted and decreased to the preset value by operating the decreasing button, so that the working voltage of the driving fan is changed, and the rotating speed of the fan is adjusted. The duty ratio may be preset, and for example, the duty ratio of the driving signal output by the control module 11 may include 2.5%,5%,7.5%,10%,12.5%,15%,17.5% and 20%, that is, adjusting the increment button once can adjust the duty ratio of the driving signal from 2.5% to 5%, adjusting the increment button once again can adjust the duty ratio of the driving signal from 5% to 7.5%, and so on. Similarly, the duty ratio of the driving signal can be adjusted from 5% to 2.5% by adjusting the primary decreasing button, and the duty ratio of the driving signal can be adjusted from 7.5% to 5% by adjusting the secondary decreasing button, which is not repeated herein. The duty ratio of each driving signal corresponds to one indicator lamp, for example, the indicator lamps include LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8, the on state of the LED1 indicator lamp indicates that the duty ratio of the driving signal output by the control module 11 is 2.5%, the on state of the LED2 indicator lamp indicates that the duty ratio of the driving signal output by the control module 11 is 5%, and the on state of the LED3 indicator lamp indicates that the duty ratio of the driving signal output by the control module 11 is 7.5% \8230 \ 8230;. When the 8 indicator lights LED1-LED8 are all lighted, the increasing function is invalid and the decreasing function is valid; and after the 8 indicator lamps LED1-LED8 are all turned off, the decreasing function is invalid and the increasing function is valid. The user can select a suitable duty ratio to adjust the duty ratio of the driving signal output by the control module 11 according to the use scene, the problem to be solved, and the like.
The application provides a fan control device, drive signal compensation unit among the device includes duty cycle adjustment button and pilot lamp, can realize the accurate adjustment and the instruction to the drive signal's of control module output duty cycle, has guaranteed the effect of adjustment.
In one embodiment, as shown in fig. 5, the control module 11 further includes: a signal conversion unit 112, where the signal conversion unit 112 is used to perform protocol conversion on the feedback signal of the detection module 14.
The control module 11 further includes a signal conversion unit 112, where the signal conversion unit 112 is configured to perform protocol conversion on data detected by the detection module 14, where the data includes, for example, a rotation speed, a voltage, a current, a power, a temperature, and the like, so that the display module 17 can display the data, and a user can conveniently grasp an operation condition of the fan from time to perform corresponding adjustment.
In one embodiment, as shown in fig. 6, the control device further includes: and the display module 17, wherein the display module 17 is configured to receive the signal after the protocol conversion and display the signal.
The control module 11 further includes a display module 17, and the display module 17 can display the data detected by the detection module 14, so that a user can conveniently grasp the operation condition of the fan from time to perform corresponding adjustment.
In one embodiment, the present embodiment is a possible structure of a lamp, and the lamp 100 includes: the device comprises a control module 11, a driving module 12, a capacitance 132 compensation module 13, a detection module 14 and a display module 17.
The control module 11 may be a processing chip, a control chip, etc. disposed inside the lamp 100, for example: the driving module 12 may be a driving circuit disposed on a processing chip or a control chip, or may be a driving circuit electrically connected to the processing chip or the control chip, the capacitance 132 compensation module 13 may be a dial switch 131 and a capacitance 132 disposed on the processing chip or the control chip, or may be a dial switch 131 and a capacitance 132 electrically connected to the processing chip or the control chip, the processing chip or the control chip is further provided with a driving signal compensation unit 111, the display module 17 may be a display screen, the display screen may be a touch display screen, a user may set working parameters of the fan and the lamp 100 through the display screen, the lamp 100 may be externally connected with one fan or multiple fans, the lamp 100 may control multiple fans through one processing chip, and each fan corresponds to a different driving module 12.
The application provides a lamps and lanterns is provided with drive module, the control module etc. that control the fan on this lamps and lanterns, need not set up drive arrangement etc. for the fan alone again, just can control the fan through lamps and lanterns for lamps and lanterns intelligence more.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A control device for a fan, the control device comprising: the detection circuit comprises a control module, a driving module, a capacitance compensation module and a detection module, wherein the capacitance compensation module comprises a capacitor, the driving module comprises a first resistor, a second resistor, an N-type field effect transistor, an inductor and a diode, a signal input end of the control module is connected with a first end of the first resistor, a first end of the second resistor is connected with a grid electrode of the N-type field effect transistor after being connected with a second end of the first resistor in parallel, a drain electrode of the N-type field effect transistor is respectively connected with an anode of the diode and a first end of the inductor, a second end of the inductor is respectively connected with an output end of the capacitor and a cathode of the fan, and a power supply end of the control module is respectively connected with a cathode of the diode and an anode of the fan;
the detection module is used for sending a first indication signal to the control module when the fan fails to start according to the initial starting voltage;
the control module is used for determining a target compensation voltage under the indication of the first indication signal;
the control module is also used for controlling the output voltage of the capacitance compensation module to be adjusted to a target compensation voltage;
and the driving module is used for conducting the negative electrode of the fan with the ground according to the target compensation voltage so as to drive the fan to start and rotate.
2. The control device of claim 1, wherein the capacitance compensation module further comprises a dip switch, wherein the control module is coupled to the capacitor via the dip switch,
the dial switch is used for controlling the on-off of the capacitor and the driving module according to the level signal of the control module;
and the capacitor is used for inputting the target compensation voltage to the driving module under the condition of being connected with the driving module.
3. The control device according to claim 1, wherein the capacitor is specifically configured to provide the target compensation voltage for the N-type fet when the capacitor is connected to the driving module, so that a drain of the N-type fet is connected to a source of the N-type fet to conduct a negative electrode of the fan to ground.
4. The control device according to claim 1, characterized in that the control device further comprises: the output end of the detection module is connected with the first end of the third resistor, the second end of the fourth resistor is connected with the second end of the third resistor in parallel and then connected with the fan, and the first end of the fourth resistor is connected with the power supply end of the control module.
5. The control device of claim 1, wherein the control module comprises: a driving signal compensation unit for compensating the driving signal,
the detection module is further used for detecting the rotating speed of the fan after the fan is started successfully, and sending a second indication signal to the control module when the rotating speed of the fan is smaller than a preset rotating speed threshold value;
the control module is further configured to adjust a duty ratio of a driving signal output by the control module through the driving signal compensation unit under the instruction of the second instruction signal, and input the adjusted driving signal to the driving module;
and the driving module is used for inputting corresponding voltage to the fan according to the adjusted driving signal so as to improve the rotating speed of the fan.
6. The control device according to claim 5, wherein the drive signal compensation unit includes: a duty cycle adjusting button and an indicator light,
the duty ratio adjusting button is used for adjusting the duty ratio of the driving signal;
the indicator light is used for indicating the duty ratio of the adjusted driving signal.
7. The control device of claim 6, wherein the control module further comprises: and the signal conversion unit is used for carrying out protocol conversion on the data detected by the detection module.
8. The control device according to claim 7, characterized by further comprising: and the display module is used for receiving and displaying the data after protocol conversion.
9. A luminaire characterized in that it comprises a control device for a fan according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469700.5A CN113187753B (en) | 2021-04-28 | 2021-04-28 | Fan control device and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469700.5A CN113187753B (en) | 2021-04-28 | 2021-04-28 | Fan control device and lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113187753A CN113187753A (en) | 2021-07-30 |
| CN113187753B true CN113187753B (en) | 2023-03-17 |
Family
ID=76980244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110469700.5A Active CN113187753B (en) | 2021-04-28 | 2021-04-28 | Fan control device and lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113187753B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11178369A (en) * | 1997-12-09 | 1999-07-02 | Seiko Instruments Inc | Ultrasonic motor and electronic equipment having the same |
| CN104467623A (en) * | 2014-12-12 | 2015-03-25 | 陈伟禧 | Fan motor speed adjusting device, fan with same and fan motor |
| CN104930666B (en) * | 2015-06-29 | 2018-02-06 | 广东美的暖通设备有限公司 | The startup control method and device of DC fan in air conditioner room unit |
| CN204886782U (en) * | 2015-07-20 | 2015-12-16 | 祝红兰 | Energy -saving variable frequency speed governing(VFSG) three phase machine |
-
2021
- 2021-04-28 CN CN202110469700.5A patent/CN113187753B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113187753A (en) | 2021-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20240114605A1 (en) | Load Control Device for High-Efficiency Loads | |
| US10285229B2 (en) | LED driving circuit having SCR dimmer, circuit module and control method thereof | |
| KR102149918B1 (en) | A led dimmer, a led lighting apparatus comprising the same, and a dimming method for the led lighting apparatus | |
| CN109041348B (en) | Adaptive circuit module, LED driving circuit with silicon controlled rectifier dimmer and method | |
| CN101315407B (en) | Solar simulator | |
| RU2660670C2 (en) | Driver device and driving method for driving load, in particular led unit | |
| US9553576B2 (en) | Driving circuit for IGBT module | |
| KR20160039716A (en) | Circuit driving light emitting diode and light apparatus comprising the same | |
| CN105814973A (en) | Driving a multi-color luminaire | |
| KR101037274B1 (en) | Method and device for supplying power to leds | |
| US20130187623A1 (en) | Smart dimming solution for led light bulb and other non-linear power ac loads | |
| US20170150568A1 (en) | Light-dimming device | |
| AU2016200365A1 (en) | Control apparatus using variations in conduction angle as control command | |
| CN105430828B (en) | Led drive device | |
| US10165642B2 (en) | Dimming device | |
| CN110381637A (en) | A kind of thermal-shutdown circuit and LED lamp | |
| CN113187753B (en) | Fan control device and lamp | |
| CN108563152A (en) | The control circuit and its control method of ASIC integrated circuits, electronic cigarette | |
| JP2018049706A (en) | Dimming device protection circuit and dimming device | |
| TWI709359B (en) | Light-emitting diode lighting system with automatic bleeder current control | |
| KR20150146168A (en) | Lighting apparatus and dimming regulation circuit thereof | |
| EP3349545B1 (en) | Lighting control device | |
| US20020093250A1 (en) | Controlling device for a heat-dissipating system | |
| CN215109629U (en) | Fan control device and lamp | |
| KR102213603B1 (en) | Trigger circuit, light apparatus comprising the same and trigger method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |