CN213478721U - DC brushless fan with zero standby power consumption - Google Patents
DC brushless fan with zero standby power consumption Download PDFInfo
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- CN213478721U CN213478721U CN202022344952.9U CN202022344952U CN213478721U CN 213478721 U CN213478721 U CN 213478721U CN 202022344952 U CN202022344952 U CN 202022344952U CN 213478721 U CN213478721 U CN 213478721U
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- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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- 229910044991 metal oxide Inorganic materials 0.000 description 2
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- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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Abstract
The utility model discloses a DC brushless fan of standby zero power consumption, include: the main control IC is used for detecting a starting signal and outputting a control signal to drive the fan to operate; the switching circuit U5 is used for switching on the PWM pulse signal, judging the value of the pulse signal and outputting a driving voltage VCC to the main control IC for controlling the on-off of the main control IC; and the H bridge is connected with the main control IC and outputs a control signal to the main control IC to drive the stator coil to generate an alternating magnetic field and control the fan to operate. The utility model discloses a DC brushless fan of standby zero-power consumption under the fan standby condition, breaks off the main control IC power, and no loss power reaches energy saving and emission reduction's purpose during the standby.
Description
Technical Field
The utility model belongs to the technical field of the direct current motor technique and specifically relates to a direct current brushless fan of standby zero-power consumption is related to.
Background
Brushless dc motors are electronically commutated using semiconductor switching devices, i.e., electronic switching devices replace conventional contact commutators and brushes. The brushless direct current motor is commonly used for the fan, when the motor is stopped, the current of 6-15mA can be generated, and as the main control IC detects the starting signal at any time, the main control IC still can generate smaller current when the fan is stopped. The fan can increase standby power consumption when in standby, and when the direct-current brushless fan is in standby for a long time, the main control IC is not beneficial to the requirements of energy conservation and emission reduction under the conditions of power loss and low current generation for a long time, and the service life of the main control IC is influenced. Therefore, the above-mentioned problems of the conventional dc brushless motor have become a technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a DC brushless fan of standby zero-power consumption, under the fan standby condition, disconnection master control IC power, no loss power during the standby reaches energy saving and emission reduction's purpose.
In order to solve the technical problem, the utility model provides a technical scheme is: a DC brushless fan with zero standby power consumption comprises: the main control IC is used for detecting a starting signal and outputting a control signal to drive the fan to operate; the switching circuit U5 is used for switching on the PWM pulse signal, judging the value of the pulse signal and outputting a driving voltage VCC to the main control IC for controlling the on-off of the main control IC; and the H bridge is connected with the main control IC and outputs a control signal to the main control IC to drive the stator coil to generate an alternating magnetic field and control the fan to operate.
By adopting the technical scheme, the switching circuit has the function of a master switch, when a PWM pulse signal is input, the pulse signal enables an NMOS (N-channel metal oxide semiconductor) tube and a PMOS (P-channel metal oxide semiconductor) tube in the switching circuit to be conducted, and the driving voltage VCC is output to the master control IC; when no PWM pulse signal is input, the NMOS tube and the PMOS tube in the switch circuit are cut off, no voltage is output by the switch circuit at the moment, the power supply of the main control IC is cut off, and the power consumption caused by the power-on standby of the main control IC is avoided.
In the dc brushless fan with zero standby power consumption, the PWM pulse signal is filtered by the switching diode D1 and the capacitor C7 to become a dc level, and then input to the switching circuit U5.
In the above dc brushless fan with zero standby power consumption, the switching circuit U5 is composed of an NMOS transistor, a PMOS transistor, a resistor R9, and a resistor R10.
In the dc brushless fan with zero standby power consumption, the H-bridge is formed by coupling the first MOS integrated module U2 and the second MOS integrated module U3.
In the direct-current brushless fan with zero standby power consumption, the first and second MOS integrated modules U2 and U3 are formed by packaging PMOS transistors and NMOS transistors.
The utility model discloses the beneficial effect who gains is: the switch circuit is arranged in front of the main control IC, the switch of the MOS tube is used for switching off and conducting power supply of the main control IC of the heat dissipation fan, when the MOS tube is cut off, the cut-off resistance is large, the standby current is small, zero power consumption of the fan in standby is achieved, when a starting signal is sent, the MOS tube is conducted, and the main control IC is conducted and operated.
Drawings
FIG. 1 is a wiring diagram of the circuit structure of the present invention;
fig. 2 is a schematic circuit diagram of the switching circuit of the present invention;
fig. 3 is a schematic wiring diagram of the first and second MOS integrated modules of the present invention;
fig. 4 is a schematic wiring diagram of the main control IC of the present invention;
fig. 5 is an equivalent circuit schematic diagram of the switching circuit of the present invention;
fig. 6 is an equivalent circuit schematic diagram of the H-bridge of the present invention;
fig. 7 is a schematic diagram of the internal structure of the first and second integrated modules according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 7, the utility model provides a dc brushless fan of standby zero power consumption, include:
the main control IC is used for detecting a starting signal and outputting a control signal to drive the fan to operate;
the switching circuit U5 is used for switching on the PWM pulse signal, judging the value of the pulse signal and outputting a driving voltage VCC to the main control IC for controlling the on-off of the main control IC;
and the H bridge is connected with the main control IC and outputs a control signal to the main control IC to drive the stator coil to generate an alternating magnetic field and control the fan to operate.
By utilizing the characteristic of PWM speed regulation of the cooling fan, when the PWM input is 0%, an NMOS tube of a switch circuit U5 is cut OFF, an ON/OFF signal in a pin 8 is suspended, a PMOS tube is cut OFF, an input VCC and an output VCC in a pin 5 are in a high-resistance state, and the current flowing in the switch circuit U5 is zero; when the PWM speed regulating signal reaches or is higher than 5%, the switch diode D1 is conducted, the ON/OFF signal in the pin 8 is 0V, the NMOS tube of the switch circuit U5 is conducted, the PMOS tube is conducted, the input VCC is equal to the output VCC, the switch circuit U5 is conducted and electrified, the master control IC is driven to be electrified and operated, and the fan operates.
The PWM pulse signal is filtered by the switching diode D1 and the capacitor C7 to become a dc level, and is input to the switching circuit U5. The switch circuit U5 is composed of NMOS transistor and PMOS transistor, and resistor R9 and resistor R10.
As shown in fig. 6 and 7, the H-bridge is formed by coupling a first MOS integrated module U2 and a second MOS integrated module U3. The first MOS integrated module U2 and the second MOS integrated module U3 are formed by packaging PMOS tubes and NMOS tubes.
Referring to fig. 2 and 5, the switching circuit U5 is a module integrated by an NMOS transistor and a PMOS transistor, and functions as a circuit master switch in the circuit, when a PWM pulse signal is input, the NMOS transistor is turned on, and then the PMOS transistor is turned on, after the switching current U5 is turned on, the output VCC is connected to the master control IC, when the switching circuit U5 is turned off, the input VCC and the output VCC are in a high-impedance state, and the switching circuit U5 does not supply power to the master control IC, so that the master control IC does not generate power consumption.
Specifically, when the PWM pulse signal is inputted, it passes through the diode D1 and the capacitor C7 for filtering, and becomes a dc level. The gate-source voltage Vgs forms a voltage difference, an NMOS tube of the switch circuit U5 is turned on, after the NMOS tube of the switch circuit U5 is turned on, a drain electrode D and a source electrode S of the NMOS tube of the switch circuit U5 are equivalently short-circuited to the ground, the resistor R9 and the resistor R10 generate partial pressure, the gate-source voltage Vgs of the PMOS tube generates a voltage difference, the PMOS tube is turned on, the source electrode S and the drain electrode D of the PMOS tube are in short circuit, and VCC voltage is output.
As shown in fig. 6, the PMOS transistor of the first MOS integrated module U2 and the NMOS transistor of the second MOS integrated module U3 are turned on simultaneously, and flow through the fan generates a magnetic field in a direction; a PMOS tube of the second MOS integrated module U3 and an NMOS tube of the first MOS integrated module U2 are conducted at the same time, and flow through the fan to generate a directional second magnetic field; and the first direction magnetic field and the second direction magnetic field are switched alternately to form an alternating magnetic field to drive the rotor of the fan to rotate.
To sum up, the utility model discloses when the PWM signal does not have input, the fan is not electrified, and the consumption is zero, has the advantage that reduces stand-by power consumption, energy saving and emission reduction.
In summary, the present invention has been made to practical samples according to the description and the drawings, and after a plurality of use tests, the utility model can be proved to achieve the expected purpose, and the practical value is undoubted. The above-mentioned embodiments are only used to conveniently illustrate the present invention, and are not to the limit of the present invention in any form, and any person who knows commonly in the technical field has, if not in the scope of the technical features of the present invention, utilize the present invention to make the equivalent embodiment of local change or modification, and not to break away from the technical features of the present invention, and all still belong to the technical features of the present invention.
Claims (5)
1. The utility model provides a DC brushless fan of standby zero power consumption which characterized in that includes:
the main control IC is used for detecting a starting signal and outputting a control signal to drive the fan to operate;
the switching circuit U5 is used for switching on the PWM pulse signal, judging the value of the pulse signal and outputting a driving voltage VCC to the main control IC for controlling the on-off of the main control IC;
and the H bridge is connected with the main control IC and outputs a control signal to the main control IC to drive the stator coil to generate an alternating magnetic field and control the fan to operate.
2. The brushless dc fan with zero standby power consumption of claim 1, wherein: the PWM pulse signal is filtered by a switch diode D1 and a capacitor C7 to become a direct current level and is input into a switch circuit U5.
3. The brushless dc fan with zero standby power consumption of claim 2, wherein: the switch circuit U5 is composed of NMOS transistor, PMOS transistor, resistor R9 and resistor R10.
4. The brushless dc fan with zero standby power consumption of claim 1, wherein: the H-bridge is formed by coupling a first MOS integrated module U2 and a second MOS integrated module U3.
5. The zero-power-consumption standby direct-current brushless fan according to claim 4, characterized in that: the first MOS integrated module U2 and the second MOS integrated module U3 are formed by packaging PMOS tubes and NMOS tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022344952.9U CN213478721U (en) | 2020-10-21 | 2020-10-21 | DC brushless fan with zero standby power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022344952.9U CN213478721U (en) | 2020-10-21 | 2020-10-21 | DC brushless fan with zero standby power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213478721U true CN213478721U (en) | 2021-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022344952.9U Active CN213478721U (en) | 2020-10-21 | 2020-10-21 | DC brushless fan with zero standby power consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213478721U (en) |
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2020
- 2020-10-21 CN CN202022344952.9U patent/CN213478721U/en active Active
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Address after: Building 1, No. 10 Chuangxin Road, Jindu Town, Gaoyao District, Zhaoqing City, Guangdong Province, 526100 Patentee after: Guangdong Shenghui Technology Co.,Ltd. Country or region after: China Address before: 526000 No.2 factory building of an village, Yaonan 1st Road, Nan'an District, Gaoyao District, Zhaoqing City, Guangdong Province Patentee before: ZHAOQING SHENGHUI ELECTRONIC TECHNOLOGY Co.,Ltd. Country or region before: China |