CN212305133U - Power supply circuit for depilating instrument - Google Patents
Power supply circuit for depilating instrument Download PDFInfo
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- CN212305133U CN212305133U CN202021380254.8U CN202021380254U CN212305133U CN 212305133 U CN212305133 U CN 212305133U CN 202021380254 U CN202021380254 U CN 202021380254U CN 212305133 U CN212305133 U CN 212305133U
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Abstract
The utility model relates to an appearance technical field that moults especially relates to a power supply circuit for appearance that moults. The circuit comprises an interface CON, a rectifying circuit and a voltage transformation and stabilization circuit; the output end of the current circuit is connected with the voltage transformation rectifying circuit, the live wire of the interface CON is connected with a fuse F1, a piezoresistor RV1 is connected between the zero line and the live wire of the interface CON, a piezoresistor RV1 is connected in parallel with a voltage stabilizing capacitor XC1, two ends of the voltage stabilizing capacitor XC1 are connected with two input ends of the rectifying circuit through a common mode inductor L1 and a common mode inductor L2 respectively, and a differential mode capacitor C2 is connected between the two input ends of the rectifying circuit. The utility model discloses a set up common mode inductance and differential mode electric capacity, can effectively eliminate the harmonic in the commercial power, the holding current is stable, protection circuit's components and parts.
Description
Technical Field
The utility model relates to an appearance technical field that moults especially relates to a power supply circuit for appearance that moults.
Background
Along with the development of society, people pay more and more attention to their own body, such as regularly clear body hair; for convenience and clarity, a number of depilatory instruments are currently on the market; when the depilating instrument is used, the depilating instrument is generally connected with the mains supply; at present, in some areas, the mains supply is unstable, the mains supply contains harmonic waves, and a power supply circuit of the depilating instrument is generally provided with a filter circuit, a rectifying circuit and a voltage transformation and stabilization circuit; the harmonic wave is not completely eliminated by the filter circuit, so that the current output by the power circuit is unstable; affecting the normal operation of the epilating apparatus.
Disclosure of Invention
An object of the utility model is to prior art not enough, provide a power supply circuit for unhairing appearance, this power supply circuit can effectively eliminate the harmonic in the commercial power, reduces electromagnetic interference.
A power supply circuit for a depilating instrument comprises an interface CON, a rectifying circuit and a voltage transformation and stabilization circuit; the output end of the current circuit is connected with the voltage transformation rectifying circuit, the live wire of the interface CON is connected with a fuse F1, a piezoresistor RV1 is connected between the zero line and the live wire of the interface CON, a piezoresistor RV1 is connected in parallel with a voltage stabilizing capacitor XC1, two ends of the voltage stabilizing capacitor XC1 are connected with two input ends of the rectifying circuit through a common mode inductor L1 and a common mode inductor L2 respectively, and a differential mode capacitor C2 is connected between the two input ends of the rectifying circuit.
Further, the rectifier circuit is a full bridge rectifier circuit.
Further, the positive output end of the rectifying circuit is connected with the negative output end of the rectifying circuit through a capacitor C3, and the negative output end is grounded; the transformation voltage stabilizing circuit comprises a voltage stabilizing control chip U1, the model of the voltage stabilizing control chip U1 is LNK616DG, the transformation voltage stabilizing circuit comprises a transformer T1, the input end of a primary coil of the transformer T1 is connected with the positive electrode output end of the rectifying circuit, the D end of the voltage stabilizing control chip U1 is connected with the output end of the primary coil of the transformer T1, and the S end of the voltage stabilizing control chip U1 is grounded; the output end of the primary coil and the secondary coil of the transformer T1 outputs a power supply VCC to the outside through a filter circuit; the output end of the secondary coil of the transformer T1 is connected with a voltage division circuit, and one middle potential end of the voltage division circuit is connected with the FB end of the voltage stabilization control chip U1.
Further, the voltage division circuit comprises a resistor R2 and a resistor R3 which are connected in series, and the intermediate potential end is a connection point of the resistor R2 and the resistor R3.
Further, the primary coil is connected with a resistor R1 and a capacitor C4 in parallel, and the resistor R1 and the capacitor C4 are connected in parallel.
Further, the filter circuit comprises a resistor R4 and a capacitor C9 which are connected in parallel; one end of the resistor R4 is connected to the output end of the primary and secondary coils, and the other end of the resistor R4 is grounded.
Further, a diode D7 is connected in series with the output end of the primary and secondary coils.
The utility model has the advantages that: the utility model discloses a set up common mode inductance and differential mode electric capacity, can effectively eliminate the harmonic in the commercial power, the holding current is stable, protection circuit's components and parts.
Drawings
Fig. 1 is a circuit diagram of the present embodiment.
Detailed Description
The following detailed description of the present invention is made with reference to the accompanying drawings. As shown in fig. 1.
Example 1:
a power supply circuit for a depilating instrument comprises an interface CON, a rectifying circuit and a voltage transformation and stabilization circuit; the output end of the current circuit is connected with the voltage transformation rectifying circuit, the live wire of the interface CON is connected with a fuse F1, a piezoresistor RV1 is connected between the zero line and the live wire of the interface CON, a piezoresistor RV1 is connected in parallel with a voltage stabilizing capacitor XC1, two ends of the voltage stabilizing capacitor XC1 are connected with two input ends of the rectifying circuit through a common mode inductor L1 and a common mode inductor L2 respectively, and a differential mode capacitor C2 is connected between the two input ends of the rectifying circuit.
When the commercial power carries harmonic waves, the common-mode inductor L1 and the common-mode inductor L2 act together to eliminate common-mode interference current in the circuit; secondly, the differential mode capacitor C2 and the voltage-stabilizing capacitor XC1 are used for eliminating differential mode interference current in the circuit, so that harmonic interference of mains supply is effectively reduced, and electromagnetic interference is reduced; secondly, the technical scheme protects the whole circuit by arranging the fuse F1, so that overlarge current is avoided; when the current is too large, the fuse wire is fused; secondly, the piezoresistor is arranged, so that lightning stroke can be prevented, when the voltage at two ends of the piezoresistor is increased to exceed a threshold value, the resistance value of the piezoresistor is reduced and conducted, the rectifying circuit is short-circuited, the current of the fuse wire is rapidly increased and fused, and the circuit is protected. When the voltage of the mains supply suddenly appears a peak value, the voltage stabilizing capacitor XC1 is used for absorbing and storing electric energy, and the problem that the voltage of a rectifying circuit is unstable and an electronic element is damaged is avoided. The voltage stabilizing capacitor XC1 may be a capacitor with a large capacitance.
Further, the rectifier circuit is a full bridge rectifier circuit.
Further, the positive output end of the rectifying circuit is connected with the negative output end of the rectifying circuit through a capacitor C3, and the negative output end is grounded; the transformation voltage stabilizing circuit comprises a voltage stabilizing control chip U1, the model of the voltage stabilizing control chip U1 is LNK616DG, the transformation voltage stabilizing circuit comprises a transformer T1, the input end of a primary coil of the transformer T1 is connected with the positive electrode output end of the rectifying circuit, the D end of the voltage stabilizing control chip U1 is connected with the output end of the primary coil of the transformer T1, and the S end of the voltage stabilizing control chip U1 is grounded; the output end of the primary coil and the secondary coil of the transformer T1 outputs a power supply VCC to the outside through a filter circuit; the output end of the secondary coil of the transformer T1 is connected with a voltage division circuit, and one middle potential end of the voltage division circuit is connected with the FB end of the voltage stabilization control chip U1.
The voltage stabilizing control chip U1 obtains the magnitude of the output voltage by measuring the voltage of the intermediate potential end, thereby adjusting the on-off frequency between the primary and secondary coils and the ground, and further adjusting the output voltage, which is not described in detail in the prior art; in the technical scheme, the primary circuit and the secondary circuit are externally output through the filter circuit so as to stabilize output current and reduce harmonic waves; and a capacitor C3 is connected in series between the positive output end and the negative output end of the rectifying circuit and is used for filtering the current output by the rectifying circuit, reducing or eliminating harmonic waves and stabilizing the current.
Further, the voltage division circuit comprises a resistor R2 and a resistor R3 which are connected in series, and the intermediate potential end is a connection point of the resistor R2 and the resistor R3.
Further, the primary coil is connected with a resistor R1 and a capacitor C4 in parallel, and the resistor R1 and the capacitor C4 are connected in parallel.
The resistor R1 and the capacitor C4 start the protection circuit, when power is cut off, electric energy is still in the primary coil, after the resistor R1 and the capacitor C4 are arranged, the electric energy is continuously transferred to the capacitor C4, and the capacitor C4 supplies power to the resistor R1 for consumption. And the electronic components are prevented from being damaged by residual electric energy.
Further, the filter circuit comprises a resistor R4 and a capacitor C9 which are connected in parallel; one end of the resistor R4 is connected to the output end of the primary and secondary coils, and the other end of the resistor R4 is grounded.
The capacitor R4 and the capacitor C9 form an RC filter circuit for filtering the output power supply.
Further, a diode D7 is connected in series with the output end of the primary and secondary coils.
Diode D7 is a schottky diode and diode D7 prevents the primary and secondary windings from reverse connecting.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the present description should not be interpreted as a limitation to the present invention.
Claims (7)
1. A power supply circuit for a depilating instrument comprises an interface CON, a rectifying circuit and a voltage transformation and stabilization circuit; the output end of the current circuit is connected with the voltage transformation rectifying circuit, and the current circuit is characterized in that: the live wire of interface CON is connected with fuse F1, is connected with piezo-resistor RV1 between interface CON's zero line and the live wire, and piezo-resistor RV1 is parallelly connected with voltage-stabilizing capacitor XC1, voltage-stabilizing capacitor XC 1's both ends are connected with two inputs of rectifier circuit through common mode inductance L1, common mode inductance L2 respectively, and are connected with differential mode capacitance C2 between two inputs of rectifier circuit.
2. A power supply circuit for a hair removal device as claimed in claim 1, wherein: the rectification circuit is a full-bridge rectification circuit.
3. A power supply circuit for a hair removal device as claimed in claim 1, wherein: the positive output end of the rectifying circuit is connected with the negative output end of the rectifying circuit through a capacitor C3, and the negative output end is grounded; the transformation voltage stabilizing circuit comprises a voltage stabilizing control chip U1, the model of the voltage stabilizing control chip U1 is LNK616DG, the transformation voltage stabilizing circuit comprises a transformer T1, the input end of a primary coil of the transformer T1 is connected with the positive electrode output end of the rectifying circuit, the D end of the voltage stabilizing control chip U1 is connected with the output end of the primary coil of the transformer T1, and the S end of the voltage stabilizing control chip U1 is grounded; the output end of the primary coil and the secondary coil of the transformer T1 outputs a power supply VCC to the outside through a filter circuit; the output end of the secondary coil of the transformer T1 is connected with a voltage division circuit, and one middle potential end of the voltage division circuit is connected with the FB end of the voltage stabilization control chip U1.
4. A power supply circuit for an epilating apparatus in accordance with claim 3, characterized in that: the voltage division circuit comprises a resistor R2 and a resistor R3 which are connected in series, and the middle potential end is a connection point of the resistor R2 and the resistor R3.
5. A power supply circuit for an epilating apparatus in accordance with claim 3, characterized in that: the primary coil is connected with a resistor R1 and a capacitor C4 in parallel, and the resistor R1 and the capacitor C4 are connected in parallel.
6. A power supply circuit for an epilating apparatus in accordance with claim 3, characterized in that: the filter circuit comprises a resistor R4 and a capacitor C9 which are connected in parallel; one end of the resistor R4 is connected to the output end of the primary and secondary coils, and the other end of the resistor R4 is grounded.
7. A power supply circuit for an epilating apparatus in accordance with claim 3, characterized in that: and the output end of the main secondary coil is connected with a diode D7 in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021380254.8U CN212305133U (en) | 2020-07-14 | 2020-07-14 | Power supply circuit for depilating instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021380254.8U CN212305133U (en) | 2020-07-14 | 2020-07-14 | Power supply circuit for depilating instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212305133U true CN212305133U (en) | 2021-01-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021380254.8U Active CN212305133U (en) | 2020-07-14 | 2020-07-14 | Power supply circuit for depilating instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212305133U (en) |
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2020
- 2020-07-14 CN CN202021380254.8U patent/CN212305133U/en active Active
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