CN216449671U - Detection circuit of fan - Google Patents
Detection circuit of fan Download PDFInfo
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- CN216449671U CN216449671U CN202123021094.5U CN202123021094U CN216449671U CN 216449671 U CN216449671 U CN 216449671U CN 202123021094 U CN202123021094 U CN 202123021094U CN 216449671 U CN216449671 U CN 216449671U
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- fan
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- voltage
- bedding
- detection circuit
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Abstract
The utility model discloses a detection circuit of a fan, comprising: the fan, detect with the one-way device that switches on and with the corresponding working power supply of rated voltage of fan, the one end of fan links to each other with working power supply's positive pole, and the other end of fan is as starting fan moving control end, and the positive pole that detects with the one-way device that switches on links to each other with the controllable end of fan, and the negative pole that detects with the one-way device that switches on is connected with and detects uses bleeder circuit, and this bleeder circuit for detection includes: one end of the upper divider resistor is connected with the cathode of the unidirectional conducting device for detection, the other end of the upper divider resistor is connected with one end of the lower divider resistor and serves as a fan feedback signal end, and the other end of the lower divider resistor is grounded; and the feedback signal end of the fan is also connected with a clamping circuit. The detection circuit can be widely applied to the driving circuits of various direct current fans.
Description
Technical Field
The utility model relates to a detection circuit, in particular to a detection circuit of a fan.
Background
In the existing ventilation system, the fan adopts uninterrupted work or manual intervention on the fan directly, so that the electric energy loss and the service life of the fan are affected; and unnecessary waste of manpower and material resources is caused.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the detection circuit of the fan is simple in structure, low in cost, safe and reliable.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a detection circuit for a wind turbine, comprising: fan, detect with one-way conduction device and with the operating power supply that the rated voltage of fan corresponds, promptly: the output voltage of working power supply with the rated voltage of fan equals, the one end of fan with working power supply's positive pole links to each other, the other end of fan is as starting fan moving control end, the positive pole that detects with the one-way conduction device with the controllable end of fan links to each other, and the negative pole that detects with the one-way conduction device is connected with and detects with bleeder circuit, and this detects with bleeder circuit's concrete structure includes: one end of the upper divider resistor is connected with the cathode of the unidirectional conducting device for detection, the other end of the upper divider resistor is connected with one end of the lower divider resistor and serves as a fan feedback signal end, and the other end of the lower divider resistor is grounded; the fan feedback signal end is also connected with a clamping circuit, and the clamping voltage of the clamping circuit is less than or equal to the voltage value of the fan feedback signal end under the conditions that the output voltage of the working power supply is equal to the rated voltage of the fan and the fan stops rotating.
As a preferable aspect, in the detection circuit of a blower, a specific structure of the clamping circuit includes: the negative pole of the clamping unidirectional conducting device is connected with the positive pole of the bedding voltage circuit, and the negative pole of the bedding voltage circuit is grounded.
Preferably, in the detection circuit for a blower, the clamping unidirectional conducting device is a diode.
As a preferable scheme, in the detection circuit of the blower, the bedding voltage circuit is a voltage stabilizing circuit.
Preferably, in the detection circuit of the fan, the bedding voltage circuit is a voltage dividing circuit for bedding.
As a preferable scheme, in the detection circuit of the blower, the bedding voltage circuit is formed by connecting at least one bedding in series by using a one-way conduction device, an anode of one bedding in the one-way conduction device is connected with a cathode of the clamping one-way conduction device, a cathode of the bedding in the one-way conduction device is connected with an anode of the next bedding in the one-way conduction device, and so on, and a cathode of the last bedding in the one-way conduction device is grounded.
As a preferable scheme, in the detection circuit of the blower, the one-way conduction device for the substrate is a diode.
As a preferable scheme, in the detection circuit of the blower, the detection unidirectional conducting device is a diode.
The utility model has the beneficial effects that: the detection circuit of the fan has the advantages that fewer components are adopted, the structure is simpler, the fault rate is greatly reduced, and the stability is improved; in addition, as the detection circuit of the fan adopts conventional devices such as a resistance-capacitance device, a diode and the like, the whole detection circuit has smaller volume and lower cost; in addition, the clamping circuit is connected to the feedback signal end of the fan, so that the whole circuit is safer and more reliable.
Drawings
Fig. 1 is an electrical schematic structural diagram of a detection circuit of a fan according to the present invention.
Detailed Description
The following describes a specific embodiment of a detection circuit of a blower according to the present invention in detail by taking a 24V dc blower as an example, with reference to the accompanying drawings.
As shown in fig. 1, the detection circuit of the blower of the present invention includes: a FAN, a diode D1 as a unidirectional conducting device for detection, and an operating power supply VCC corresponding to a rated voltage of the FAN, that is: an output voltage of the operating power supply VCC is equal to a rated voltage of the FAN (which belongs to the conventional technology in the field and will not be described herein), one end of the FAN is connected to an anode of the operating power supply VCC, the other end of the FAN is used as a control terminal FAN for starting the operation of the FAN, an anode of the diode D1 is connected to the control terminal FAN of the FAN, and a cathode of the diode D1 is connected to a voltage division circuit for detection, including: the fan feedback signal terminal FANIN comprises an upper voltage-dividing resistor R1 and a lower voltage-dividing resistor R2, wherein one end of an upper voltage-dividing resistor R1 is connected with the cathode of a diode D1, the other end of an upper voltage-dividing resistor R1 is connected with one end of a lower voltage-dividing resistor R2 and serves as a fan feedback signal terminal FANIN, and the other end of the lower voltage-dividing resistor R2 is grounded GND; fan feedback signal end FANIN still be connected with the clamp circuit, this clamp circuit's concrete structure includes: a diode D2 as a clamping one-way conduction device and a 3.3V backing voltage circuit, wherein the anode of the diode D2 is connected with a fan feedback signal terminal FANIN, the cathode of the diode D2 is connected with the anode of the backing voltage circuit, and the cathode of the backing voltage circuit is grounded (belonging to the conventional technology in the field and not described herein); in this embodiment, a 3.3V pad voltage circuit is selected because the rated voltage of FAN is 24V, and correspondingly, the output voltage of working power source VCC is also 24V, when FAN does not work (stall), the floating voltage of control terminal FANCT is 24V, since the tube voltage of diodes D1 and D2 (type selected T4148) is reduced to 0.7V, the negative terminal (cathode) of diode D1 is 23.3V, and is divided by upper and lower voltage dividing resistors R1 and R2, so that FAN feedback signal terminal FANIN voltage V is made to be the FAN feedback signal terminal FANINFANIN23.3V R2/(R1+ R2) 4V; while the voltage drop of 0.7 volts for the 3.3 volt pad voltage circuit + diode D2 is also 4 volts.
In practical application, the bedding voltage circuit can also be a voltage stabilizing circuit or a voltage dividing circuit for bedding, and can also be formed by connecting at least one bedding in series by using a one-way conducting device, wherein the anode of one bedding in the one-way conducting device is connected with the cathode of the clamping one-way conducting device, the cathode of the bedding in the one-way conducting device is connected with the anode of the next bedding in the one-way conducting device, and so on, and the cathode of the last bedding in the one-way conducting device is grounded.
During actual work, if the system detects that the FANIN signal is 4V, the FAN of the FAN is judged not to be in a working state; if the FAN is required to be started, the CTR terminal in the control circuit for driving the FAN to operate in the left dotted line frame in fig. 1 is only required to be changed to a high level. Due to the clamping circuit, when the output voltage VCC of the working power supply exceeds 24V, 3.3V plus the diode D2 tube voltage drop is 0.7V, V due to the clamping function of the diode D2FANINThe fan feedback signal FANIN is protected from generating high voltage to cause system damage.
In summary, the present invention is only a preferred embodiment, and not intended to limit the scope of the utility model, and all equivalent changes and modifications made in the shape, structure, characteristics and spirit of the present invention described in the claims should be included in the scope of the present invention.
Claims (8)
1. A detection circuit for a wind turbine, comprising: fan, the operating power supply who corresponds to the rated voltage of fan promptly: the output voltage of working power supply with the rated voltage of fan equals, the one end of fan links to each other with working power supply's positive pole, the other end of fan is as starting fan moving control end, its characterized in that: the detection circuit of fan still including: its positive pole with the one-way device that switches on is used in the detection that the controllable end of fan links to each other, and the negative pole that detects with the one-way device that switches on is connected with and detects and uses bleeder circuit, and this bleeder circuit for detection includes: one end of the upper divider resistor is connected with the cathode of the unidirectional conducting device for detection, the other end of the upper divider resistor is connected with one end of the lower divider resistor and serves as a fan feedback signal end, and the other end of the lower divider resistor is grounded; the fan feedback signal end is also connected with a clamping circuit, and the clamping voltage of the clamping circuit is less than or equal to the voltage value of the fan feedback signal end under the conditions that the output voltage of the working power supply is equal to the rated voltage of the fan and the fan stops rotating.
2. The detection circuit of a blower according to claim 1, wherein one specific structure of the clamp circuit comprises: the negative pole of the clamping unidirectional conducting device is connected with the positive pole of the bedding voltage circuit, and the negative pole of the bedding voltage circuit is grounded.
3. The blower fan detection circuit as claimed in claim 2, wherein the clamping unidirectional conducting device is a diode.
4. The blower fan detection circuit of claim 2, wherein the voltage-to-pad circuit is a voltage regulator circuit.
5. The blower fan detection circuit as claimed in claim 2, wherein the pad voltage circuit is a voltage divider circuit for pad.
6. The detection circuit of the fan according to claim 2, wherein the bedding voltage circuit is formed by connecting at least one bedding in series by using a one-way conduction device, wherein the anode of one bedding in use of the one-way conduction device is connected with the cathode of the clamping in use of the one-way conduction device, the cathode of the bedding in use of the one-way conduction device is connected with the anode of the next bedding in use of the one-way conduction device, and so on, and the cathode of the last bedding in use of the one-way conduction device is grounded.
7. The blower fan detection circuit as claimed in claim 6, wherein the one-way conduction device for the substrate is a diode.
8. The fan detecting circuit according to any one of claims 1 to 7, wherein the detecting unidirectional conducting device is a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123021094.5U CN216449671U (en) | 2021-12-03 | 2021-12-03 | Detection circuit of fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123021094.5U CN216449671U (en) | 2021-12-03 | 2021-12-03 | Detection circuit of fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216449671U true CN216449671U (en) | 2022-05-06 |
Family
ID=81354945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123021094.5U Active CN216449671U (en) | 2021-12-03 | 2021-12-03 | Detection circuit of fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216449671U (en) |
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2021
- 2021-12-03 CN CN202123021094.5U patent/CN216449671U/en active Active
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