CN219938224U - Self-adaptive power supply regulating circuit - Google Patents
Self-adaptive power supply regulating circuit Download PDFInfo
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- CN219938224U CN219938224U CN202321183614.9U CN202321183614U CN219938224U CN 219938224 U CN219938224 U CN 219938224U CN 202321183614 U CN202321183614 U CN 202321183614U CN 219938224 U CN219938224 U CN 219938224U
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- resistor
- adaptive power
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 32
- 238000004804 winding Methods 0.000 claims abstract description 37
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 36
- 239000010703 silicon Substances 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims abstract description 31
- 238000010168 coupling process Methods 0.000 claims abstract description 23
- 238000005859 coupling reaction Methods 0.000 claims abstract description 23
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 3
- 230000003044 adaptive effect Effects 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model discloses a self-adaptive power supply regulating circuit, which is applied to a blower and comprises: the homonymous ends of the primary winding and the secondary winding of the self-coupling inductor are connected with the output end of the mains supply; the self-adaptive rectification circuit comprises a first diode, a second diode, a third diode, a unidirectional silicon controlled rectifier, a first photoelectric coupler and an electrolytic capacitor, wherein the negative electrode of the first diode and the positive electrode of the second diode are connected with the synonym end of a primary winding of an auto-coupling inductor, the positive electrode of the first diode and the positive electrode of the third diode are connected with the synonym end of a secondary winding of the auto-coupling inductor, the negative electrode of the third diode and the positive electrode of the unidirectional silicon controlled rectifier are connected with the synonym end of the secondary winding of the auto-coupling inductor, the negative electrode of the unidirectional silicon controlled rectifier and the negative electrode of the second diode are connected with the positive electrode of the electrolytic capacitor, the control electrode and the positive electrode of the unidirectional silicon controlled rectifier are respectively connected with a first main terminal and a second main terminal of the bidirectional silicon controlled rectifier in the first photoelectric coupler, and the positive electrode of the light emitting diode in the first photoelectric coupler are respectively connected with a power supply VCC and an MCU of a blower.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to an adaptive power supply regulating circuit.
Background
At present, 220V/50Hz alternating current is adopted in the hair dryer industry, however, because the commercial power standards of each country are different, the commercial power of some countries is 220V, but some countries are 110V, and if the hair dryer is carried by the hair dryer, a power supply adapter plug is usually required to be equipped, so that the hair dryer is troublesome.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an adaptive power supply regulating circuit which can adapt to commercial power with different standards without an adapter when applied to a blower.
In order to solve the above technical problems, the present utility model provides an adaptive power supply adjusting circuit, which is applied to a blower and connected between a mains supply output end and a blower power supply circuit, comprising:
the homonymous ends of the primary winding and the secondary winding of the self-coupling inductor are connected with the output end of the mains supply;
the self-adaptive rectification circuit comprises a first diode, a second diode, a third diode, a unidirectional silicon controlled rectifier, a first photoelectric coupler and an electrolytic capacitor, wherein the negative electrode of the first diode and the positive electrode of the second diode are connected with the different name end of a primary winding of an auto-coupling inductor, the positive electrodes of the first diode and the third diode are both connected with the negative electrode of the electrolytic capacitor and grounded, the negative electrode of the third diode and the positive electrode of the unidirectional silicon controlled rectifier are connected with the different name end of a secondary winding of the auto-coupling inductor, the negative electrode of the unidirectional silicon controlled rectifier and the negative electrode of the second diode are connected with the positive electrode of the electrolytic capacitor and serve as the output end of the self-adaptive power supply regulating circuit, the control electrode and the positive electrode of the unidirectional silicon controlled rectifier are respectively connected with a first main terminal and a second main terminal of the bidirectional silicon controlled rectifier in the first photoelectric coupler through a resistor, and the positive electrode and the negative electrode of the light emitting diode in the first photoelectric coupler are respectively connected with a power supply VCC and an MCU (micro controller) of the blower so that when the MCU (micro controller control unit) detects that the voltage of the self-adaptive power supply regulating circuit is lower than the preset output end of the first photoelectric coupler and controls the unidirectional silicon controlled rectifier.
The further technical scheme is as follows: the self-adaptive power supply regulating circuit further comprises a zero-crossing detection circuit, the zero-crossing detection circuit comprises a piezoresistor, a sixteenth resistor, a seventeenth resistor, a fifth diode and a second photoelectric coupler, wherein one end of the piezoresistor and the positive electrode of the fifth diode are both connected with the homonymous end of the primary winding of the self-coupling inductor, the other end of the piezoresistor is connected with the homonymous end of the secondary winding of the self-coupling inductor and the sixteenth resistor, the other end of the sixteenth resistor is connected with the cathode of a light-emitting diode in the second photoelectric coupler through the seventeenth resistor, the anode of the light-emitting diode in the second photoelectric coupler is connected with the negative electrode of the fifth diode, the emitting electrode of a triode in the second photoelectric coupler is grounded, and the collector of the triode is connected with the MCU of the blower so as to output a zero-crossing detection signal to the MCU of the blower.
The further technical scheme is as follows: the zero-crossing detection circuit further comprises a third capacitor, and the third capacitor is connected between an emitter and a collector of the triode in the second photoelectric coupler.
The further technical scheme is as follows: the self-adaptive power supply regulating circuit also comprises a fuse and a thermistor, and homonymous ends of the primary winding and the secondary winding of the self-coupling inductor are respectively connected with a mains supply output end through the fuse and the thermistor.
The further technical scheme is as follows: the self-adaptive power supply regulating circuit further comprises a first capacitor, a second resistor and a sixth resistor, wherein the second resistor and the sixth resistor are connected in series and then connected with the first capacitor in parallel between the homonymous ends of the primary winding and the secondary winding of the self-coupling inductor.
The further technical scheme is as follows: the self-adaptive power supply regulating circuit further comprises a second capacitor, a fifth resistor and a seventh resistor, wherein the fifth resistor and the seventh resistor are connected in series and then connected with the second capacitor in parallel between the output end of the self-adaptive power supply regulating circuit and the ground.
Compared with the prior art, the unidirectional silicon controlled rectifier is arranged in the self-adaptive power supply regulating circuit, when the unidirectional silicon controlled rectifier is conducted, the rectifier bridge formed by the first diode, the second diode, the third diode and the unidirectional silicon controlled rectifier is in a full-bridge rectifier mode, namely, when the MCU of the blower detects that the voltage of the output end of the self-adaptive power supply regulating circuit is lower than a preset threshold value, namely, 220V mains supply is not supplied at the moment, the unidirectional silicon controlled rectifier is controlled to be conducted through the first photoelectric coupler, so that the rectifier bridge is converted into the full-bridge rectifier mode from the half-wave rectifier mode, the power supply voltage of the power supply is improved, and the blower can adapt to mains supplies with different standards (for example, 110V) without being provided with an independent power supply adapter.
Drawings
Fig. 1 is a schematic circuit diagram of an adaptive power supply adjusting circuit according to an embodiment of the utility model.
Detailed Description
The present utility model will be further described with reference to the drawings and examples below in order to more clearly understand the objects, technical solutions and advantages of the present utility model to those skilled in the art.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of an adaptive power supply adjusting circuit according to an embodiment of the utility model. The self-adaptive power supply regulating circuit is applied to the blower and is connected between the commercial power output end and the blower power supply circuit, and the power supply circuit of the blower can comprise a step-down circuit and the like, so that the commercial power supply voltage is reduced to the voltage required for driving the motor and the MCU in the blower to work.
In the embodiment shown in the drawings, the self-adaptive power supply regulating circuit comprises an auto-inductor L and a self-adaptive rectifying circuit 12, wherein the homonymous ends of a primary winding and a secondary winding of the auto-inductor L are connected with a mains supply output end, and in the embodiment, as shown in the drawings, the homonymous ends of the primary winding and the secondary winding of the auto-inductor L are respectively connected with a live wire ACL and a zero wire ACN of the mains supply output; the self-adaptive rectification circuit 12 comprises a first diode D6, a second diode D7, a third diode D8, a unidirectional silicon controlled rectifier SCR, a first photoelectric coupler U10 and an electrolytic capacitor EC1, wherein the cathode of the first diode D6 and the anode of the second diode D7 are connected with the synonym end of the primary winding of the self-coupling inductor L, the anodes of the first diode D6 and the third diode D8 are both connected with the cathode of the electrolytic capacitor EC1 and grounded, the cathode of the third diode D8 and the anode of the unidirectional silicon controlled rectifier SCR are connected with the synonym end of the secondary winding of the self-coupling inductor L, the cathode of the unidirectional silicon controlled rectifier SCR and the anode of the second diode D7 are connected with the anode of the electrolytic capacitor EC1 and serve as the output end of the self-adaptive power supply regulation circuit, and are connected with the blower power supply circuit, the control electrode and the anode of the unidirectional silicon controlled rectifier SCR are respectively connected with the MCUU8 of the blower through a fifth resistor R55 and a fifty-sixth resistor R56, when the unidirectional silicon controlled rectifier SCR and the unidirectional silicon controlled rectifier SCR are connected with the first end of the self-coupling inductor L, the first photoelectric coupler U10 and the second electric power supply terminal of the self-adaptive power supply are respectively connected with the cathode of the self-adaptive power supply regulation circuit U8, and the unidirectional silicon controlled rectifier SCR is connected with the cathode of the self-adaptive power supply regulation circuit through the cathode. Preferably, the preset threshold is 85V; the model of the MCUU8 can be LKS32MCR11C6T8, the 1 st pin of the MCUU8 is connected with the output end of the self-adaptive power supply regulating circuit, and the 12 th pin of the MCUU8 is connected with the cathode of the light emitting diode in the first photoelectric coupler U10; the anode of the light emitting diode in the first photo coupler U10 is connected to a power supply VCC through a fifty-seventh resistor R57, where the power supply VCC is a reference power supply.
It can be understood that when the unidirectional silicon controlled rectifier SCR is not turned on, the second diode D7 and the third diode D8 are turned on, and are in a half-wave rectification mode at this time, that is, when the electric blower is not started by inserting the electric supply, the electric blower is in half-wave rectification initially, when the MCUU8 of the blower detects that the voltage Vout at the output end of the adaptive power supply regulating circuit is lower than 85V, the electric supply is supplied to the non-220V electric supply at this time, the MCUU8 controls the unidirectional silicon controlled rectifier SCR to be turned on through the first photoelectric coupler U10, and the full-bridge rectification mode is turned on to increase the power supply voltage, and at this time, if the MCUU8 of the blower detects that the voltage Vout at the output end of the adaptive power supply regulating circuit is between 90 and 135V, the blower can normally operate, and the MCUU8 controls the motor in the blower to be started. Therefore, the self-adaptive power supply regulating circuit can ensure that the blower can normally work without additionally providing a power supply adapter, and the cost can be reduced.
IN some embodiments, the adaptive power supply adjusting circuit further includes a zero-crossing detection circuit 13, where the zero-crossing detection circuit 13 includes a piezoresistor ZNR, a sixteenth resistor R16, a seventeenth resistor R17, a fifth diode D2, and a second photo-coupler U3, where one end of the piezoresistor ZNR and an anode of the fifth diode D2 are both connected to a homonymous end of the primary winding of the autotransformer L, the other end of the piezoresistor ZNR is connected to a homonymous end of the secondary winding of the autotransformer L and a sixteenth resistor R16, and the other end of the sixteenth resistor R16 is connected to a cathode of a light emitting diode IN the second photo-coupler U3 through a seventeenth resistor R17, an anode of the light emitting diode IN the second photo-coupler U3 is connected to a cathode of the fifth diode D2, an emitter of the triode IN the second photo-coupler U3 is grounded, and a collector is connected to a 10 th pin of the MCU U8 of the blower to output the zero-crossing detection signal nzero_in to the mcuu8 of the blower. Based on the above design, the MCUU8 of the blower may calculate the zero crossing point according to the time interval between the rising edge and the falling edge of the zero crossing detection signal nzero_in to realize the zero crossing detection.
Further, in this embodiment, the zero crossing detection circuit 13 further includes a third capacitor C3, and the third capacitor C3 is connected between the emitter and the collector of the triode in the second photo coupler U3.
In some embodiments, the adaptive power supply adjusting circuit further includes a fuse F1, a thermistor TR1, a first capacitor C1, a second resistor R2, and a sixth resistor R6, the homonymous ends of the primary winding and the secondary winding of the self-coupling inductor L are connected to the mains supply output end through the fuse F1 and the thermistor TR1, and after the second resistor R2 and the sixth resistor R6 are connected in series, they are connected in parallel with the first capacitor C1 between the homonymous ends of the primary winding and the secondary winding of the self-coupling inductor L. Based on the design, the filtering of alternating current output by the mains supply can be realized through the first capacitor C1, the second resistor R2 and the sixth resistor R6.
Preferably, the adaptive power supply adjusting circuit further includes a second capacitor C2, a fifth resistor R5, and a seventh resistor R7, where the fifth resistor R5 and the seventh resistor R7 are connected in series and then connected in parallel with the second capacitor C2 between the output terminal of the adaptive power supply adjusting circuit and ground. Filtering of the output power of the adaptive power supply regulating circuit can be achieved through the second capacitor C2, the fifth resistor R5 and the seventh resistor R7 based on the design.
As can be appreciated, when the self-adaptive power supply regulating circuit is applied to a blower to work, firstly, a plug of the blower is plugged into a commercial power, at this time, the unidirectional silicon controlled rectifier SCR is not turned on, a motor in the blower is not turned on, a rectifier bridge formed by a first diode D6, a second diode D7, a third diode D8 and the unidirectional silicon controlled rectifier SCR is in a half-bridge rectification mode, the MCUU8 of the blower detects the voltage Vout at the output end of the self-adaptive power supply regulating circuit, and if the voltage is in a normal range (90-135V), the voltage can be determined to be 220V commercial power, and the motor is started; if the voltage is lower than 85V, the voltage is supplied to non-220V mains supply at the moment, the MCUU8 controls the one-way silicon controlled rectifier SCR to be conducted through the first photoelectric coupler U10, a full-bridge rectification mode is started so as to improve the power supply voltage, at the moment, the MCUU8 of the blower detects the voltage Vout of the output end of the self-adaptive power supply regulating circuit again, if the voltage is between 90 and 135V, the voltage is doubled, the voltage is supplied to 110V mains supply, the blower can work normally, and the MCU8 controls the motor in the blower to start; if the voltage Vout at the output end of the self-adaptive power supply regulating circuit detected by the MCUU8 is still lower than 85V after the unidirectional silicon controlled rectifier SCR is turned on, the MCU U8 performs a low-voltage under-voltage alarm, the blower motor is not started, and if the voltage Vout is higher than 140V, the MCUU8 performs an overvoltage alarm, and the unidirectional silicon controlled rectifier SCR is immediately turned off, so that the blower motor is not started.
In summary, when the MCU of the blower detects that the voltage at the output end of the adaptive power supply adjusting circuit is lower than the preset threshold, that is, the voltage is not supplied by 220V mains supply, the first photoelectric coupler controls the unidirectional silicon controlled rectifier to be turned on, so that the rectifier bridge is converted into a half-wave rectifier mode to be converted into a full-bridge rectifier mode, the power supply voltage of the power supply is improved, the blower can adapt to mains supplies with different standards (for example, 110V) without being equipped with an independent power adapter, and the cost can be reduced.
The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes or modifications made within the scope of the claims shall fall within the scope of the present utility model.
Claims (6)
1. An adaptive power supply regulation circuit, which is applied to a blower and is connected between a mains supply output end and a blower power supply circuit, and is characterized by comprising:
the homonymous ends of the primary winding and the secondary winding of the self-coupling inductor are connected with the output end of the mains supply;
the self-adaptive rectification circuit comprises a first diode, a second diode, a third diode, a unidirectional silicon controlled rectifier, a first photoelectric coupler and an electrolytic capacitor, wherein the negative electrode of the first diode and the positive electrode of the second diode are connected with the different name end of a primary winding of an auto-coupling inductor, the positive electrodes of the first diode and the third diode are both connected with the negative electrode of the electrolytic capacitor and grounded, the negative electrode of the third diode and the positive electrode of the unidirectional silicon controlled rectifier are connected with the different name end of a secondary winding of the auto-coupling inductor, the negative electrode of the unidirectional silicon controlled rectifier and the negative electrode of the second diode are connected with the positive electrode of the electrolytic capacitor and serve as the output end of the self-adaptive power supply regulating circuit, the control electrode and the positive electrode of the unidirectional silicon controlled rectifier are respectively connected with a first main terminal and a second main terminal of the bidirectional silicon controlled rectifier in the first photoelectric coupler through a resistor, and the positive electrode and the negative electrode of the light emitting diode in the first photoelectric coupler are respectively connected with a power supply VCC and an MCU (micro controller) of the blower so that when the MCU (micro controller control unit) detects that the voltage of the self-adaptive power supply regulating circuit is lower than the preset output end of the first photoelectric coupler and controls the unidirectional silicon controlled rectifier.
2. The adaptive power supply regulation circuit of claim 1, wherein: the self-adaptive power supply regulating circuit further comprises a zero-crossing detection circuit, the zero-crossing detection circuit comprises a piezoresistor, a sixteenth resistor, a seventeenth resistor, a fifth diode and a second photoelectric coupler, wherein one end of the piezoresistor and the positive electrode of the fifth diode are both connected with the homonymous end of the primary winding of the self-coupling inductor, the other end of the piezoresistor is connected with the homonymous end of the secondary winding of the self-coupling inductor and the sixteenth resistor, the other end of the sixteenth resistor is connected with the cathode of a light-emitting diode in the second photoelectric coupler through the seventeenth resistor, the anode of the light-emitting diode in the second photoelectric coupler is connected with the negative electrode of the fifth diode, the emitting electrode of a triode in the second photoelectric coupler is grounded, and the collector of the triode is connected with the MCU of the blower so as to output a zero-crossing detection signal to the MCU of the blower.
3. The adaptive power supply regulation circuit of claim 2, wherein: the zero-crossing detection circuit further comprises a third capacitor, and the third capacitor is connected between an emitter and a collector of the triode in the second photoelectric coupler.
4. The adaptive power supply regulation circuit of claim 1, wherein: the self-adaptive power supply regulating circuit also comprises a fuse and a thermistor, and homonymous ends of the primary winding and the secondary winding of the self-coupling inductor are respectively connected with a mains supply output end through the fuse and the thermistor.
5. The adaptive power supply regulation circuit of claim 1, wherein: the self-adaptive power supply regulating circuit further comprises a first capacitor, a second resistor and a sixth resistor, wherein the second resistor and the sixth resistor are connected in series and then connected with the first capacitor in parallel between the homonymous ends of the primary winding and the secondary winding of the self-coupling inductor.
6. The adaptive power supply regulation circuit of claim 1, wherein: the self-adaptive power supply regulating circuit further comprises a second capacitor, a fifth resistor and a seventh resistor, wherein the fifth resistor and the seventh resistor are connected in series and then connected with the second capacitor in parallel between the output end of the self-adaptive power supply regulating circuit and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321183614.9U CN219938224U (en) | 2023-05-16 | 2023-05-16 | Self-adaptive power supply regulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321183614.9U CN219938224U (en) | 2023-05-16 | 2023-05-16 | Self-adaptive power supply regulating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219938224U true CN219938224U (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321183614.9U Active CN219938224U (en) | 2023-05-16 | 2023-05-16 | Self-adaptive power supply regulating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219938224U (en) |
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2023
- 2023-05-16 CN CN202321183614.9U patent/CN219938224U/en active Active
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