CN112039317A - Automobile fan standby zero-power-consumption control circuit in PWM control mode - Google Patents
Automobile fan standby zero-power-consumption control circuit in PWM control mode Download PDFInfo
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- CN112039317A CN112039317A CN202010975357.7A CN202010975357A CN112039317A CN 112039317 A CN112039317 A CN 112039317A CN 202010975357 A CN202010975357 A CN 202010975357A CN 112039317 A CN112039317 A CN 112039317A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
A PWM control mode automobile fan standby zero power consumption control circuit belongs to the technical field of automobile fan control. The fan control panel power supply system comprises a pulse capacitor charging module, a power switch module and a PWM signal level conversion module, wherein the pulse capacitor charging module is connected with the power switch module, the PWM signal level conversion module is connected with the pulse capacitor charging module, a common connecting end of the pulse capacitor charging module is used for connecting a PWM signal output by a central controller, the power switch module is used for connecting a fan control panel, the pulse capacitor charging module and the power switch module are matched to supply power to the fan control panel under the condition of PWM signal input, and the pulse capacitor charging module and the power switch module are matched to cut off the power supply of the fan control panel under the condition of PWM signal turn-off, so that the fan control panel is in a. The invention realizes the zero power consumption standby of the automobile fan in the PWM control mode by using cheap discrete components such as a resistor, a capacitor, a diode, a triode and an MOS tube.
Description
Technical Field
The invention belongs to the technical field of automobile fan control, and particularly relates to a zero-power-consumption standby control circuit of an automobile fan in a PWM (pulse width modulation) control mode.
Background
The embedded application in the field of automobile manufacturing leads to high electronization of automobile parts, and automobile electronic systems all use central control as a core to control distributed modules to complete control tasks.
The control of the rotating speed of a fan of an automobile is a control object in the field of automobile electronics. In highly electronic systems, the early mechanical switching power supply control is no longer used, but the control module is required to automatically enter a low power consumption state when the system is shut down, so as to avoid consuming battery energy. Low power consumption is a relative concept, and the requirements of different standards are different, and in short, the smaller the consumed energy in the low power consumption mode is, the better the consumed energy is. For the control module, designing low Power consumption standby, basically, a chip with Power dwon function must be used; for the control embedded chip of the core, it is necessary to support a Sleep mode with low power consumption. Meanwhile, automotive electronic systems require that electronic devices must use devices of the automotive grade, i.e., operating temperatures in the range of-40 ℃ to 125 ℃, which necessarily results in an increase in device cost.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides a PWM control mode automobile fan standby zero power consumption control circuit.
The technical problem of the invention is mainly solved by the following technical scheme: a PWM control mode automobile fan standby zero power consumption control circuit comprises a pulse capacitor charging module, a power switch module and a PWM signal level conversion module, wherein the pulse capacitor charging module is connected with the power switch module, the PWM signal level conversion module is connected with the pulse capacitor charging module, a public connecting end of the PWM signal level conversion module is used for being connected with a PWM signal output by a central controller, the power switch module is used for being connected with a fan control panel, the pulse capacitor charging module and the power switch module are matched to supply power to a fan control panel under the condition of PWM signal input, and the pulse capacitor charging module and the power switch module are matched to cut off the power supply of the fan control panel under the condition of PWM signal turn-off, so that the fan control panel is in a zero power consumption standby state.
Preferably, when the central control outputs the PWM signal in the manner of using the PNP triode OC gate, the central control supplies power to the pulse capacitor charging module in the manner of supplying power to the external current.
Preferably, the central controller supplies power to the pulse capacitor charging module through the input signal inverter module.
Preferably, the input signal inverter module includes a resistor R10, a resistor R11, a diode Z1 and a transistor Q4, a negative electrode of the diode Z1 is connected to the PWM signal, a positive electrode of the diode Z1 is respectively connected to one end of the resistor R10 and one end of the resistor R11, the other end of the resistor R10 is connected to a base of the transistor Q4, a collector of the transistor Q4 is connected to a common connection end of the PWM signal level conversion module and the pulse capacitor charging module, an emitter of the transistor Q4 is connected to the other end of the resistor R11, and the common connection end is grounded.
Preferably, when the central control outputs the PWM signal in an NPN triode OC gate manner, the central control supplies power to the pulse capacitor charging module in a current-in manner.
Preferably, the pulse capacitor charging module comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C3 and a double diode D1, one end of the resistor R1 is connected to the power switch module, the other end of the resistor R1 is respectively connected to one end of a resistor R2, one end of a capacitor C1 and the PWM signal level conversion module, the other end of the resistor R2 is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to the common connection electrode of the double diode D1, the negative electrode of the double diode D1 is respectively connected to one end of a resistor R3, one end of a capacitor C3 and the power switch module, the other end of the capacitor C3 is respectively connected to the other end of the power switch module, the other end of a resistor R3, the positive electrode of the double diode D1 and the other end of the capacitor C1.
Preferably, the power switch module includes a resistor R4, a resistor R5, a resistor R6, a capacitor C4, a capacitor C5, a transistor Q1, and a MOS transistor Q2, one end of the resistor R4 is connected to the pulse capacitor charging module, the other end of the resistor R4 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the pulse capacitor charging module, the collector of the transistor Q1 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to one end of the resistor R5, one end of the capacitor C4, and the gate of the MOS transistor Q2, the source of the MOS transistor Q2 is connected to the other end of the capacitor C4, the other end of the resistor R5, and the pulse capacitor charging module, the drain of the MOS transistor Q2 is connected to one end of the capacitor C5, and the common connection of the same is connected to the fan control board, and the other.
Preferably, the PWM signal level conversion module includes a resistor R7, a resistor R8, a resistor R9, a diode D2 and a transistor Q3, a negative electrode of the diode D2 is connected to the pulse capacitor charging module, a positive electrode of the diode D2 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to one end of a resistor R7 and a base of the transistor Q3, the other end of the resistor R7 is connected to an emitter of the transistor Q3, a collector of the transistor Q3 is connected to one end of the resistor R9, a common connection end of the collector of the transistor Q3 is connected to the fan control board, and the other end of the resistor R9 is grounded.
The invention has the following beneficial effects: the invention realizes the zero power consumption standby of the automobile fan in the PWM control mode by using cheap discrete components such as resistors, capacitors, diodes, triodes and MOS tubes, and has the characteristic of low cost. When the PWM signal is turned off by the central control, the power supply of the fan control panel can be automatically cut off, zero power consumption standby is realized, and two output driving modes of the central control PNP and the NPN are supported.
Drawings
FIG. 1 is a circuit diagram of the present invention;
FIG. 2 is a circuit diagram of the present invention in which the output is controlled in the manner of a PNP triode OC gate;
FIG. 3 is a waveform diagram of a fan control circuit key point corresponding to the PNP output type PWM control mode of the present invention;
FIG. 4 is another circuit diagram of the present invention;
fig. 5 is a circuit diagram of the output of the invention in the manner of an OC gate of an NPN transistor.
In the figure: 1. a pulse capacitance charging module; 2. a power switch module; 3. a PWM signal level conversion module; 4. an input signal inverter module.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1: a PWM control mode automobile fan standby zero power consumption control circuit is shown in figure 1 and comprises a pulse capacitor charging module 1, a power switch module 2 and a PWM signal level conversion module 3, wherein the pulse capacitor charging module 1 is connected with the power switch module 2, the PWM signal level conversion module 3 is connected with the pulse capacitor charging module 1, a public connecting end of the PWM signal level conversion module is used for being connected with a PWM signal output by a central control, the power switch module 2 is used for being connected with a fan control panel, when the PWM signal is input, the pulse capacitor charging module 1 and the power switch module 2 are matched for supplying power to the fan control panel, and when the PWM signal is turned off, the pulse capacitor charging module 1 and the power switch module 2 are matched for cutting off the power supply of the fan control panel, so that the fan control panel is in a zero power consumption standby state.
When the central control outputs the PWM signal in the mode of using the PNP triode OC gate, the central control supplies power to the pulse capacitor charging module 1 in the mode of using the external current. The central control supplies power to the pulse capacitor charging module 1 through the input signal inverter module 4.
As shown in fig. 2, the output terminal of PNP triode OC gate is used for central control. The PNP transistor OC gate output, commonly referred to as PNP output type, is capable of supplying current, commonly referred to as sourcing current, to a load to ground when the PNP transistor is on during operation. For the PNP output type, the user receiving the signal needs to use the equivalent pull-down resistor to obtain the effective driving current to obtain the driving square wave at the PWM signal output terminal. When the master control end stops sending signals, the PNP triode is closed, the output of the OC gate is in a suspended state, and the pull current capability is not provided for the outside.
The frequency of PWM signals sent by the main control of different manufacturers is generally between 100Hz and 1000Hz, the effective high-level duty ratio used in the normal rotating speed control range is generally between 15 percent and 85 percent, the fan is required to stop running outside the normal duty ratio, and the fan control panel is required to enter a low-power consumption standby state when the PWM signals are cut off.
The pulse capacitor charging module 1 comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C3 and a double diode D1, the power switch module 2 comprises a resistor R4, a resistor R5, a resistor R6, a capacitor C4, a capacitor C5, a triode Q1 and a MOS transistor Q2, the PWM signal level conversion module 3 comprises a resistor R7, a resistor R8, a resistor R9, a diode D2 and a triode Q3, one end of the resistor R1 is connected with the automobile battery voltage VB, the other end of the resistor R1 is respectively connected with one end of a resistor R2, one end of a capacitor C1 and the negative electrode of a diode D2, the other end of the resistor R2 is connected with one end of a capacitor C2, the other end of the capacitor C2 is connected with a common connection of the double diode D1, the type of the double diode D1 is BAV 1, the negative electrode of the double diode D1 is respectively connected with one end of the resistor R1 and the other end of the resistor R1, an emitter of the triode Q1 is connected to the other end of the capacitor C3, the other end of the resistor R3, the anode of the double diode D1 and the other end of the capacitor C1 respectively, a common connection end of the triode Q1 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to one end of the resistor R5, one end of the capacitor C4 and the gate of the MOS transistor Q2 respectively, a source of the MOS transistor Q2 is connected to the other end of the capacitor C4, the other end of the resistor R5, one end of the resistor R1 and the vehicle battery voltage VB respectively, a drain of the MOS transistor Q2 is connected to one end of the capacitor C5, a common connection end of the MOS transistor Q2 is connected to the fan control board and used as a power supply terminal VM of the fan control board, and the other end.
Diode D2's positive pole termination resistance R8's one end, resistance R8's the other end is connected resistance R7's one end and triode Q3's base respectively, resistance R7's another termination triode Q3's projecting pole, and its public connection termination control circuit's power supply VDD, resistance R9's one end is connected to triode Q3's collecting electrode, and its public connection termination fan control board for provide the speed given signal PWM 'of control core, resistance R9's other end ground connection. Diode D2's negative pole termination resistance R1's the other end, and its common connection termination input signal inverter module 4, input signal inverter module 4 includes resistance R10, resistance R11, diode Z1 and triode Q4, diode Z1 is the schottky diode, diode Z1's negative pole is used for connecting the PWM signal of well accuse (PNP output type) output, diode Z1's positive pole is connected resistance R10's one end and resistance R11's one end respectively, resistance R10's another termination triode Q4's base, triode Q4's collecting electrode is connected diode D2 and resistance R1's common connection end, triode Q4's the other end of connecting resistance R11, and common connection end ground.
The working principle is as follows: when the PWM signal sent by the central control is in an effective state, the PNP transistor at the central control end is in an uninterrupted on-off state, and since the ground equivalent resistor of the input signal inverter module 4 provides a pull-down resistor for the PNP transistor, the PNP transistor pulls out a current to drive the transistor Q4 to perform switching operation. The switching of transistor Q4 produces a substantially square wave waveform on noise filter capacitor C1, which is generated by the pull-up action of resistor R1 and the RC charging element in the branch of resistor R2. The resistor R2, the capacitor C2, the double diode D1, the resistor R3, the capacitor C3, the resistor R4 and the transistor Q1 form a pulse type fast-charging and slow-discharging circuit relative to the capacitor C3, when the waveform on the capacitor C1 is a rising edge, current quickly charges the capacitor C3 through the resistor R1, the resistor R2, the capacitor C2 and a right diode of the double diode D1, when the waveform on the capacitor C1 is a falling edge, the capacitor C2 discharges through the resistor R2 and a left diode of the double diode D1 to ensure that the next period is normally charged, the capacitor C3 slowly discharges through the resistor R3, the resistor R4 and a base of the transistor Q1, and as long as a PWM signal is not interrupted, the transistor Q1 can be kept continuously conducted. The conduction of the transistor Q1 drops a sufficient voltage across the resistor R5, which acts on the S-G terminal (source-gate) of the MOS transistor Q2 to provide it with a sufficient VGS voltage to ensure that the MOS transistor Q2 is fully turned on to supply power to the fan control board. When the PWM signal of central control is turned off, the capacitor C3 is not charged any more, the discharging is finished very quickly, the triode Q1 is turned off after losing the base current, the VGS voltage of the MOS transistor Q2 is turned off after becoming zero, and the fan control panel is stopped. Under the state, the working current of the PWM signal input part is zero, the triode Q4 is turned off, the current on the resistor R1 is zero, the triode Q1 is turned off, the current on the resistor R5 is zero, the MOS transistor Q2 is turned off, the current of the power supply end VM is zero, and the zero power consumption under the standby state is integrally realized.
As shown in fig. 3, a waveform diagram of a key point of a fan control circuit corresponding to the PNP output PWM control mode is shown, where the waveform of the voltage at the key point of the control circuit is shown. The graph shows the working curves of 5 signals, and PWM is the waveform after an input signal is connected to a control circuit and a pull-down load is connected; uc1 is the voltage waveform on the first primary working node capacitor C1 in the control circuit; uc2 is the voltage waveform on the capacitor C3 of the second main working node in the control circuit; VM is the voltage waveform of the power supply for the fan control panel by the control circuit; PWM' is the waveform of the speed-giving signal provided to the fan control board after level conversion in the control circuit, and these waveforms represent the timing of the operation of the control circuit.
Example 2: a standby zero-power-consumption control circuit of an automobile fan in a PWM control mode is shown in figure 4 and comprises a pulse capacitor charging module 1, a power switch module 2 and a PWM signal level conversion module 3, and is only different from the embodiment 1 in that no input signal phase inverter module 4 is arranged, a central control outputs a PWM signal in an OC gate mode through an NPN triode, and the central control supplies power to the pulse capacitor charging module 1 in an inward current filling mode. The common connection of diode D2 and resistor R1 is used directly to connect the PWM signal from the central control (NPN output type) output.
As shown in fig. 5, the output terminal of the central control is implemented by using NPN triode OC gate. The NPN transistor OC gate mode output, commonly referred to as an NPN output mode, is capable of supplying current, commonly referred to as sinking current, to a load coupled to a positive power supply when the transistor is on during operation. For the NPN output type, the user receiving the signal needs to use an equivalent pull-up resistor to obtain an effective driving current to obtain a driving square wave at the PWM signal output terminal. When the main control end stops sending signals, the NPN triode is closed, the output of the OC gate is in a suspended state, and the current filling capacity is not provided to the outside.
The working principle is as follows: when a PWM signal sent by the central control is in an effective state, an NPN triode at the central control end is in an uninterrupted switching state, the NPN triode directly provides a sink current for the resistor R1, so that a waveform similar to a square wave is generated on the noise filtering capacitor C1, and the waveform is generated by the pull-up action of the resistor R1 and an RC charging link on a resistor R2 branch circuit. The resistor R2, the capacitor C2, the double diode D1, the resistor R3, the capacitor C3, the resistor R4 and the transistor Q1 form a pulse type fast-charging and slow-discharging circuit relative to the capacitor C3, when the waveform on the capacitor C1 is a rising edge, current quickly charges the capacitor C3 through the resistor R1, the resistor R2, the capacitor C2 and a right diode of the double diode D1, when the waveform on the capacitor C1 is a falling edge, the capacitor C2 discharges through the resistor R2 and a left diode of the double diode D1 to ensure that the next period is normally charged, the capacitor C3 slowly discharges through the resistor R3, the resistor R4 and a base of the transistor Q1, and as long as a PWM signal is not interrupted, the transistor Q1 can be kept continuously conducted. The conduction of the transistor Q1 drops a sufficient voltage across the resistor R5, which acts on the S-G terminal (source-gate) of the MOS transistor Q2 to provide it with a sufficient VGS voltage to ensure that the MOS transistor Q2 is fully turned on to supply power to the fan control board. When the PWM signal of central control is turned off, the capacitor C3 is not charged any more, the discharging is finished very quickly, the triode Q1 is turned off after losing the base current, the VGS voltage of the MOS transistor Q2 is turned off after becoming zero, and the fan control panel is stopped. Under the state, the working current of the PWM signal input part is zero, the triode Q4 is turned off, the current on the resistor R1 is zero, the triode Q1 is turned off, the current on the resistor R5 is zero, the MOS transistor Q2 is turned off, the current of the power supply end VM is zero, and the zero power consumption under the standby state is integrally realized.
The waveform diagram of the key point of the fan control circuit corresponding to the NPN output type PWM control mode is the same as that of the PNP output type, and the description is not repeated here.
In conclusion, the invention realizes the zero-power-consumption standby of the automobile fan in the PWM control mode by using the cheap discrete components such as the resistor, the capacitor, the diode, the triode and the MOS tube, and has the characteristic of low cost. When the PWM signal is turned off by the central control, the power supply of the fan control panel can be automatically cut off, zero power consumption standby is realized, and two output driving modes of the central control PNP and the NPN are supported.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.
Claims (8)
1. The PWM control mode automobile fan standby zero power consumption control circuit is characterized by comprising a pulse capacitor charging module, a power switch module and a PWM signal level conversion module, wherein the pulse capacitor charging module is connected with the power switch module, the PWM signal level conversion module is connected with the pulse capacitor charging module, a public connecting end of the PWM signal level conversion module is used for being connected with a PWM signal output by a central control, the power switch module is used for being connected with a fan control panel, the pulse capacitor charging module and the power switch module are matched for supplying power to a fan control panel under the condition of PWM signal input, and the pulse capacitor charging module and the power switch module are matched for cutting off the power supply of the fan control panel under the condition of PWM signal turn-off so that the fan control panel is in a zero power consumption standby state.
2. The automobile fan standby zero-power-consumption control circuit with the PWM control mode according to claim 1, wherein when the central controller outputs the PWM signal in a PNP triode OC door mode, the central controller supplies power to the pulse capacitor charging module in a mode of drawing current outwards.
3. The PWM control mode automobile fan standby zero-power control circuit as claimed in claim 2, wherein the central control supplies power to the pulse capacitor charging module through the input signal inverter module.
4. The fan standby zero power consumption control circuit of the automobile with the PWM control mode as claimed in claim 3, wherein the input signal inverter module comprises a resistor R10, a resistor R11, a diode Z1 and a transistor Q4, the cathode of the diode Z1 is connected with the PWM signal, the anode of the diode Z1 is respectively connected with one end of a resistor R10 and one end of a resistor R11, the other end of the resistor R10 is connected with the base of a transistor Q4, the collector of the transistor Q4 is connected with the common connection end of the PWM signal level conversion module and the pulse capacitor charging module, the emitter of the transistor Q4 is connected with the other end of the resistor R11, and the common connection end is grounded.
5. The automobile fan standby zero-power-consumption control circuit in the PWM control mode according to claim 1, wherein when the central control outputs the PWM signal in an OC gate mode through an NPN triode, the central control supplies power to the pulse capacitor charging module in an inward current filling mode.
6. The automobile fan standby zero-power control circuit of the PWM control mode according to claim 1, the pulse capacitor charging module is characterized by comprising a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C3 and a double diode D1, one end of the resistor R1 is connected with the power switch module, the other end of the resistor R1 is respectively connected with one end of the resistor R2, one end of the capacitor C1 and the PWM signal level conversion module, the other end of the resistor R2 is connected with one end of a capacitor C2, the other end of the capacitor C2 is connected with the common connecting pole of a double diode D1, the cathode of the double diode D1 is respectively connected with one end of a resistor R3, one end of a capacitor C3 and the power switch module, the other end of the capacitor C3 is respectively connected with the power switch module, the other end of the resistor R3, the anode of the double diode D1 and the other end of the capacitor C1, and the common connection end of the capacitor C3 is grounded.
7. The automobile fan standby zero-power control circuit of the PWM control mode according to claim 1, the power switch module is characterized by comprising a resistor R4, a resistor R5, a resistor R6, a capacitor C4, a capacitor C5, a triode Q1 and a MOS transistor Q2, one end of the resistor R4 is connected with the pulse capacitor charging module, the other end of the resistor R4 is connected with the base electrode of the triode Q1, the emitter of the triode Q1 is connected with a pulse capacitor charging module, the collector of the triode Q1 is connected with one end of a resistor R6, the other end of the resistor R6 is respectively connected with one end of a resistor R5, one end of a capacitor C4 and the grid of a MOS tube Q2, the source of the MOS transistor Q2 is respectively connected with the other end of the capacitor C4, the other end of the resistor R5 and the pulse capacitor charging module, the drain electrode of the MOS transistor Q2 is connected with one end of a capacitor C5, the common connection end of the MOS transistor Q2 is connected with a fan control board, and the other end of the capacitor C5 is grounded.
8. The automobile fan standby zero-power control circuit with the PWM control mode according to claim 1, wherein the PWM signal level conversion module comprises a resistor R7, a resistor R8, a resistor R9, a diode D2 and a transistor Q3, a cathode of the diode D2 is connected with the pulse capacitor charging module, an anode of the diode D2 is connected with one end of the resistor R8, the other end of the resistor R8 is respectively connected with one end of a resistor R7 and a base of the transistor Q3, the other end of the resistor R7 is connected with an emitter of the transistor Q3, a collector of the transistor Q3 is connected with one end of the resistor R9, a common connection end of the resistor R9 is connected with a fan control board, and the other end of the resistor R9 is grounded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975357.7A CN112039317A (en) | 2020-09-16 | 2020-09-16 | Automobile fan standby zero-power-consumption control circuit in PWM control mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010975357.7A CN112039317A (en) | 2020-09-16 | 2020-09-16 | Automobile fan standby zero-power-consumption control circuit in PWM control mode |
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| CN112039317A true CN112039317A (en) | 2020-12-04 |
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| CN202010975357.7A Withdrawn CN112039317A (en) | 2020-09-16 | 2020-09-16 | Automobile fan standby zero-power-consumption control circuit in PWM control mode |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050185427A1 (en) * | 2004-02-19 | 2005-08-25 | Bcd Semiconductor Manufacturing Limited | 384X-based burst mode PWM controller |
| CN203243065U (en) * | 2013-03-11 | 2013-10-16 | 深圳硕日新能源科技有限公司 | Solar controller drive circuit with short-circuit protection |
| CN109936322A (en) * | 2019-03-08 | 2019-06-25 | 株洲易力达机电有限公司 | Vehicle-mounted electric machine controller and controller low power consumption switch circuit based on PWM speed-regulating signal |
| CN209638067U (en) * | 2019-02-21 | 2019-11-15 | 无锡方辰电子科技有限公司 | A kind of processing of brushless electronic fan PWM speed-regulating signal and stand-by circuit |
-
2020
- 2020-09-16 CN CN202010975357.7A patent/CN112039317A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050185427A1 (en) * | 2004-02-19 | 2005-08-25 | Bcd Semiconductor Manufacturing Limited | 384X-based burst mode PWM controller |
| CN203243065U (en) * | 2013-03-11 | 2013-10-16 | 深圳硕日新能源科技有限公司 | Solar controller drive circuit with short-circuit protection |
| CN209638067U (en) * | 2019-02-21 | 2019-11-15 | 无锡方辰电子科技有限公司 | A kind of processing of brushless electronic fan PWM speed-regulating signal and stand-by circuit |
| CN109936322A (en) * | 2019-03-08 | 2019-06-25 | 株洲易力达机电有限公司 | Vehicle-mounted electric machine controller and controller low power consumption switch circuit based on PWM speed-regulating signal |
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Application publication date: 20201204 |