CN214900696U - Direct-current brushless fan capable of achieving low-power-consumption standby - Google Patents
Direct-current brushless fan capable of achieving low-power-consumption standby Download PDFInfo
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- CN214900696U CN214900696U CN202022344954.8U CN202022344954U CN214900696U CN 214900696 U CN214900696 U CN 214900696U CN 202022344954 U CN202022344954 U CN 202022344954U CN 214900696 U CN214900696 U CN 214900696U
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Abstract
The utility model discloses a but direct current brushless fan of low-power consumption standby, include: the low-power-consumption switch circuit comprises two operational amplifiers U6A and U6B which are connected with each other by circuits, and the low-power-consumption switch circuit receives and controls the on-off of the output voltage of the low-power-consumption switch circuit according to the PWM signal; the singlechip U1 is connected with the low-power-consumption switch circuit through a circuit, receives the PWM signal and outputs a control signal for controlling the fan to operate; and the input end of the H bridge is connected to the output interface of the single chip microcomputer, and the stator coil of the fan is driven according to the control signal output by the single chip microcomputer U1 to generate an alternating magnetic field to drive the fan to operate. In this way, the utility model discloses a power of low-power consumption switch circuit control singlechip for direct current brushless fan complete machine consumption reduces under standby state, satisfies energy saving and emission reduction's demand.
Description
Technical Field
The utility model belongs to the technical field of the direct current motor technique and specifically relates to a but direct current brushless fan of low-power consumption standby 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 a fan, when the motor is stopped, the brushless direct current motor can generate current of 6-15mA, and the main control chip can still generate small current when the fan stops because the main control chip detects a starting signal constantly. Aiming at the power consumption generated when the fan is in standby, the chip in the prior art integrates a low power consumption function, and the chip enters a dormant state through codes to realize low power consumption. However, such a chip has a large volume and a high price because a low power consumption circuit is integrated inside the chip. Therefore, the problem of high cost and large size of the chip caused by integrating low power consumption power into the chip is a technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but DC brushless fan of low-power consumption standby, through the power of low-power consumption switch circuit control singlechip for DC brushless fan complete machine consumption reduces under the standby state, satisfies energy saving and emission reduction's demand, has solved traditional integrated low-power consumption circuit's among the above-mentioned prior art chip price simultaneously and has been expensive, bulky technical problem.
In order to solve the technical problem, the utility model provides a technical scheme is: a DC brushless fan capable of low power consumption standby comprises: the low-power-consumption switch circuit comprises two operational amplifiers U6A and U6B which are connected with each other by circuits, and the low-power-consumption switch circuit receives and controls the on-off of the output voltage of the low-power-consumption switch circuit according to the PWM signal; the singlechip U1 is connected with the low-power-consumption switch circuit through a circuit, receives the PWM signal and outputs a control signal for controlling the fan to operate; and the input end of the H bridge is connected to the output interface of the single chip microcomputer, and the stator coil of the fan is driven according to the control signal output by the single chip microcomputer U1 to generate an alternating magnetic field to drive the fan to operate.
The above technical scheme is adopted in the utility model, low-power consumption switch circuit connects singlechip U1's power end, control singlechip U1's power break-make, be used for controlling the fan operation in singlechip U1 output control signal to H bridge, when there is not PWM signal input in the low-power consumption switch circuit, low-power consumption switch circuit breaks off its voltage output, make singlechip U1 disconnect-supply, be in standby state, fan complete machine consumption electric current is low to 3-4mA this moment, singlechip U1 after the outage has played the effect of good reduction consumption.
The brushless direct current fan capable of achieving low power consumption standby further comprises a Hall sensor U2, wherein the Hall sensor U2 senses the position of a rotor and feeds a detection signal back to the single chip microcomputer U1.
The direct-current brushless fan capable of realizing low-power-consumption standby further comprises a voltage reduction IC, and the voltage reduction IC is used for reducing the input voltage of the fan to the voltage supplied to the singlechip U1 and the Hall sensor U2. The input voltage of the fan is usually 12/24V, and is reduced to 5V through the voltage reduction IC, and the power is supplied to the single chip microcomputer U1 and the Hall sensor U2.
In the direct-current brushless fan capable of realizing low-power-consumption standby, the HLP and HRP output signals of the single-chip microcomputer U1 are respectively input into the H bridge through the output signals HLPM and HRPM converted by the first level conversion module. The single chip microcomputer U1 can only output 5V level, the direct current brushless fan supplies power for 12V/24V, when the direct drive fan of H bridge operates, the grid electrode of PMOS pipe in the H bridge has pressure difference with drain electrode voltage Vdg level, the PMOS pipe can be always conducted, and the Vdg voltage of PMOS pipe in the H bridge output control direct current brushless fan operates stably through the first level conversion module.
In the dc brushless fan capable of low power consumption standby, the input end of the single chip microcomputer U1 for receiving the PWM signal is connected to the second level conversion module composed of the NMOS transistor Q4, the resistor R19, the resistor R20, and the resistor R12. And the PWM signal is controlled to be input into the stable level to the singlechip U1 through the second level conversion module.
According to the direct-current brushless fan capable of achieving low-power-consumption standby, the H bridge comprises the first MOS integrated module and the second MOS integrated module which are integrated with the NMOS tube and the PMOS tube.
The utility model discloses the beneficial effect who gains is: the power on/off of other chips in the fan circuit is realized through the low-power-consumption switch circuit, so that the power consumption current of the circuit when the fan is in a standby state is reduced; specifically, when the fan obtains a start signal, the low-power-consumption switch circuit operates and outputs voltage to supply power to the single chip microcomputer U1 and the Hall sensor U2, when the fan obtains a stop signal, the low-power-consumption switch circuit operates and turns off the voltage output to cut off the power supplies of the single chip microcomputer U1 and the Hall sensor U2, the power consumption current of the whole fan is 3-4mA, and compared with the traditional fan, the motor current of the fan in the prior art is about 11 mA.
Drawings
Fig. 1 is a schematic circuit diagram of a low power consumption switching circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a wiring circuit of the single chip microcomputer according to the embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a hall sensor according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a step-down IC according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a first level shift module according to an embodiment of the present invention;
fig. 6 is a schematic circuit structure diagram of a first MOS integrated module in an H-bridge according to an embodiment of the present invention;
fig. 7 is a schematic circuit structure diagram of a second MOS integrated module in an H-bridge according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 7, a dc brushless fan capable of low power consumption standby includes:
the low-power-consumption switch circuit comprises two operational amplifiers U6A and U6B which are connected with each other by circuits, and the low-power-consumption switch circuit receives and controls the on-off of the output voltage of the low-power-consumption switch circuit according to the PWM signal;
the singlechip U1 is connected with the low-power-consumption switch circuit through a circuit, receives the PWM signal and outputs a control signal for controlling the fan to operate;
and the input end of the H bridge is connected to the output interface of the single chip microcomputer, and the stator coil of the fan is driven according to the control signal output by the single chip microcomputer U1 to generate an alternating magnetic field to drive the fan to operate.
This brushless fan of direct current still includes hall sensor U2 and step-down IC, and hall sensor U2 responds to the rotor position, feeds back detected signal to during singlechip U1. And the voltage reduction IC is used for reducing the voltage of the input voltage of the fan to the voltage for supplying power to the single chip microcomputer U1 and the Hall sensor U2. When the fan of the utility model obtains the starting signal, the low power consumption switch circuit operates and outputs voltage to supply power to the single chip microcomputer U1 and the Hall sensor U2; when the fan obtains a stop signal, the low-power-consumption switch circuit operates and turns off the voltage output, the power supply of the single chip microcomputer U1 and the Hall sensor U2 is cut off, and the power consumption current of the whole fan is only 3-4mA at the moment. Specifically, when the PWM signal is below 10%, the positive input terminal voltage of the operational amplifier U6A is lower than the negative input terminal voltage through the operational amplifier, U6A outputs a negative voltage, the output is 0V, and the operational amplifier U6B follows the output low voltage. When the PWM signal is higher than 10%, the positive input terminal of the operational amplifier U6A is higher than the negative input terminal through the operational amplifier, the operational amplifier U6A outputs a positive voltage, the output is DC5V, and the operational amplifier U6B follows the output DC 5V.
In this embodiment, the operational amplifier U6A is used as a comparator, when a PWM signal is input from the positive terminal of the operational amplifier U6A, the PWM signal is filtered into a dc voltage to be compared with the negative terminal of the operational amplifier U6A, when the voltage at the positive input terminal is higher than that at the negative input terminal, the operational amplifier U6A outputs a high level, when the voltage at the positive input terminal is lower than that at the negative input terminal, the operational amplifier U6A outputs a low level, the operational amplifier U6B is used as a follower of the operational amplifier U6A, when the operational amplifier U6A outputs a high level, the operational amplifier U6B outputs a high level, and when the operational amplifier U6A outputs a low level, the operational amplifier U6B outputs a low level.
HLP and HRP output signals of the single chip microcomputer U1 are respectively input into the H bridge through output signals HLPM and HRPM converted by the first level conversion module.
The input end of the singlechip U1 for receiving the PWM signal is connected with a second level conversion module consisting of an NMOS tube Q4, a resistor R19, a resistor R20 and a resistor R12.
The H-bridge comprises a first MOS integrated module U3 and a second MOS integrated module U4 which are integrated with NMOS tubes and PMOS tubes. The first and second MOS integrated modules U3 and U4 are formed by packaging NMOS transistors and PMOS transistors, respectively.
The power supply voltage of the single chip microcomputer U1 is 3-6V, the input voltage of the fan is 12/24V, the input voltage of the fan is reduced to 5V through the voltage reduction IC, and the 5V direct current is input into the single chip microcomputer U1, the Hall sensor U2 and the low-power-consumption switch circuit.
The single chip microcomputer U1 judges the current rotor position by detecting the signal of the Hall sensor U2; the single chip microcomputer U1 switches on the stator coil to form a variable magnetic field by changing the switching-on time sequence of the first MOS integrated module U3 and the second MOS integrated module U4, and drives the stator coil to generate the variable magnetic field by an H bridge formed by the first MOS integrated module U3 and the second MOS integrated module U4 to drive the fan to operate; the single chip microcomputer U1 can change the output power of the first MOS integrated module U3 and the second MOS integrated module U4 and adjust the rotating speed of the fan by reading the PWM pulse signal; the single chip microcomputer U1 can output a rotor rotating speed signal FG for reading the rotating speed of the fan; the single chip microcomputer U1 can read the solenoid current, control the output current of the single chip microcomputer U1, and protect the fan from being burnt.
Referring to fig. 1 to 7, HLP and HRP are IO outputs of the single chip microcomputer U1, and HLPM and HRPM are output signals after level conversion by the first level conversion module, respectively; the power supply voltage 12/24V for the fan is input at the Port end; the PWM pulse signal is a control signal output by an external control circuit of the fan to the fan and is used for controlling the rotating speed of the fan.
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 (6)
1. The utility model provides a but DC brushless fan of low-power consumption standby which characterized in that includes:
the low-power-consumption switch circuit comprises two operational amplifiers U6A and U6B which are connected with each other by circuits, and the low-power-consumption switch circuit receives and controls the on-off of the output voltage of the low-power-consumption switch circuit according to the PWM signal;
the singlechip U1 is connected with the low-power-consumption switch circuit through a circuit, receives the PWM signal and outputs a control signal for controlling the fan to operate;
and the input end of the H bridge is connected to the output interface of the single chip microcomputer, and the stator coil of the fan is driven according to the control signal output by the single chip microcomputer U1 to generate an alternating magnetic field to drive the fan to operate.
2. The dc brushless fan of claim 1, wherein the dc brushless fan comprises: the motor rotor position detection device further comprises a Hall sensor U2, wherein the Hall sensor U2 senses the position of the rotor and feeds back a detection signal to the single chip microcomputer U1.
3. The dc brushless fan capable of low power consumption standby according to claim 2, wherein: the fan voltage reduction circuit also comprises a voltage reduction IC, and the voltage reduction IC is used for reducing the input voltage of the fan to the voltage for supplying power to the single chip microcomputer U1 and the Hall sensor U2.
4. The dc brushless fan of claim 1, wherein the dc brushless fan comprises: HLP and HRP output signals of the single chip microcomputer U1 are respectively input into the H bridge through output signals HLPM and HRPM converted by the first level conversion module.
5. The DC brushless fan capable of low power consumption standby according to claim 4, wherein: the input end of the singlechip U1 for receiving the PWM signal is connected with a second level conversion module consisting of an NMOS tube Q4, a resistor R19, a resistor R20 and a resistor R12.
6. The DC brushless fan capable of low power consumption standby according to claim 4, wherein: the H-bridge comprises a first MOS integrated module U3 and a second MOS integrated module U4 which are integrated with NMOS tubes and PMOS tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022344954.8U CN214900696U (en) | 2020-10-21 | 2020-10-21 | Direct-current brushless fan capable of achieving low-power-consumption standby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022344954.8U CN214900696U (en) | 2020-10-21 | 2020-10-21 | Direct-current brushless fan capable of achieving low-power-consumption standby |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214900696U true CN214900696U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022344954.8U Active CN214900696U (en) | 2020-10-21 | 2020-10-21 | Direct-current brushless fan capable of achieving low-power-consumption standby |
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| CN (1) | CN214900696U (en) |
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- 2020-10-21 CN CN202022344954.8U patent/CN214900696U/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 |
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