CN215452517U - Efficient active filter circuit - Google Patents
Efficient active filter circuit Download PDFInfo
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- CN215452517U CN215452517U CN202121658103.9U CN202121658103U CN215452517U CN 215452517 U CN215452517 U CN 215452517U CN 202121658103 U CN202121658103 U CN 202121658103U CN 215452517 U CN215452517 U CN 215452517U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a high-efficiency active filter circuit, which relates to the field of filtering and comprises: the commercial power supply module is used for providing 220V alternating current; the voltage reduction rectification filtering module is used for providing voltage reduction, rectification and filtering for the 220V alternating current and converting the voltage reduction, rectification and filtering into low-voltage direct current; the switch module is used for controlling the conduction of the circuit; the voltage control module is used for outputting adjustable direct current voltage; the high-frequency signal filtering module is used for quickly stopping band attenuation and filtering unnecessary high-frequency clutter signals; compared with the prior art, the utility model has the beneficial effects that: this scheme has added two electric capacity, two resistances on first-order active filter circuit's basis to this accelerates the stop band decay, and the mixed and disorderly signal of quick filtering, the output signal decay that leads to for two resistances that prevent to increase simultaneously passes through amplifier, triode amplification output signal after accomplishing mixed and disorderly signal filtering.
Description
Technical Field
The utility model relates to the field of filtering, in particular to a high-efficiency active filter circuit.
Background
The active filter is used for dynamically suppressing harmonic waves and compensating reactive power, and can compensate harmonic waves with variable sizes and frequencies and variable reactive power. The active filter is called as active, and the device needs to provide a power supply (for compensating the harmonic of the main circuit) as the name suggests, so that the application of the device can overcome the defects of the traditional harmonic suppression and reactive compensation methods (the traditional method can only realize fixed compensation) such as an LC filter and the like, realize dynamic tracking compensation, and can supplement both harmonic and reactive power.
Although the first-order active filter circuit has a simple circuit, the attenuation of the stop band is too slow, and the selectivity is too poor, so that the effect of filtering unwanted signals is general, certain interference exists, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a high efficiency active filter circuit to solve the above problems.
In order to achieve the purpose, the utility model provides the following technical scheme:
a high efficiency active filter circuit comprising:
the commercial power supply module is used for providing 220V alternating current;
the voltage reduction rectification filtering module is used for providing voltage reduction, rectification and filtering for the 220V alternating current and converting the voltage reduction, rectification and filtering into low-voltage direct current;
the switch module is used for controlling the conduction of the circuit;
the voltage control module is used for outputting adjustable direct current voltage;
the high-frequency signal filtering module is used for quickly stopping band attenuation and filtering unnecessary high-frequency clutter signals;
the commercial power supply module, the voltage reduction rectification filter module, the switch module, the voltage control module and the high-frequency signal filtering module are sequentially connected in series.
As a still further scheme of the utility model: the voltage reduction rectification filter module comprises a transformer W, a diode D1, a diode D2, a diode D3, a diode D4, a capacitor C1, a capacitor C2 and a resistor R1, wherein the input end of the transformer W is connected with the mains supply module, one end of the output end of the transformer W is connected with the anode of the diode D1 and the cathode of the diode D3, the other end of the output end of the transformer W is connected with the anode of the diode D2 and the cathode of the diode D4, the cathode of the diode D1 is connected with the cathode of the diode D2, the capacitor C1, the resistor R1 and the capacitor C2, and the anode of the diode D3 is connected with the anode of the diode D4, the other end of the capacitor C1, the other end of the resistor R1 and the other end of the capacitor C2.
As a still further scheme of the utility model: the switch module comprises a resistor R2, a switch S1 and a diode D5, wherein one end of the resistor R2 is connected with the cathode of the diode D1, the other end of the resistor R2 is connected with a switch S1, and the other end of the switch S1 is connected with the anode of the diode D5.
As a still further scheme of the utility model: the voltage control module comprises an integrated circuit U1, a resistor R3, a capacitor C3, a triode V1, a resistor R4, a potentiometer RP1 and a capacitor C4, wherein a pin 8 of the integrated circuit U1 is connected with the negative electrode of a diode D5, a resistor R3, a capacitor C3 and the emitter of a triode V1, a pin 4 of the integrated circuit U1 is connected with the other end of a resistor R3, the other end of the capacitor C3 and the base of a triode V1, a pin 5 of the integrated circuit U1 is grounded, a pin 3 of the integrated circuit U1 is connected with a resistor R4 and a potentiometer RP1, the other end of the potentiometer RP1 is grounded, the other end of the resistor R4 is connected with the collector of a triode V1 and the capacitor C4, and the other end of the capacitor C4 is grounded.
As a still further scheme of the utility model: the high-frequency signal filtering module comprises an input signal VIN, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C5, a capacitor C6, a capacitor C7, a triode V2 and an output signal VOUT, wherein the input signal VIN is connected with the resistor R5, the other end of the resistor R5 is connected with a capacitor C5 and a resistor R6, the other end of the capacitor C5 is grounded, the other end of the resistor R6 is connected with a capacitor C6 and a resistor R7, the other end of the capacitor C6 is grounded, the other end of the resistor R7 is connected with the capacitor C7 and the same-phase end of an amplifier U2, the other end of the capacitor C7 is grounded, the reverse-phase end of the amplifier U2 is connected with a resistor R8 and a resistor R9, the other end of the resistor R8 is grounded, the other end of the resistor R9 is connected with the output end of the amplifier U2 and the base of the triode V2, and the emitter of the triode V2 is connected with the output signal VOUT.
Compared with the prior art, the utility model has the beneficial effects that: this scheme has added two electric capacity, two resistances on first-order active filter circuit's basis to this accelerates the stop band decay, and the mixed and disorderly signal of quick filtering, the output signal decay that leads to for two resistances that prevent to increase simultaneously passes through generator, triode amplification output signal after accomplishing mixed and disorderly signal filtering.
Drawings
Fig. 1 is a schematic diagram of a high efficiency active filter circuit.
Fig. 2 is a circuit diagram of a high efficiency active filter circuit.
Fig. 3 is a pin diagram of ICL 8211.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1, a high efficiency active filter circuit includes:
the commercial power supply module is used for providing 220V alternating current;
the voltage reduction rectification filtering module is used for providing voltage reduction, rectification and filtering for the 220V alternating current and converting the voltage reduction, rectification and filtering into low-voltage direct current;
the switch module is used for controlling the conduction of the circuit;
the voltage control module is used for outputting adjustable direct current voltage;
the high-frequency signal filtering module is used for quickly stopping band attenuation and filtering unnecessary high-frequency clutter signals;
the commercial power supply module, the voltage reduction rectification filter module, the switch module, the voltage control module and the high-frequency signal filtering module are sequentially connected in series.
In this embodiment: referring to fig. 2, the buck rectifying and filtering module includes a transformer W, a diode D1, a diode D2, a diode D3, a diode D4, a capacitor C1, a capacitor C2, and a resistor R1, an input end of the transformer W is connected to the utility power module, one end of an output end of the transformer W is connected to an anode of the diode D1 and a cathode of the diode D3, the other end of the output end of the transformer W is connected to an anode of the diode D2 and a cathode of the diode D4, a cathode of the diode D1 is connected to a cathode of the diode D2, the capacitor C1, the resistor R1, and the capacitor C2, and an anode of the diode D3 is connected to an anode of the diode D4, the other end of the capacitor C1, the other end of the resistor R1, and the other end of the capacitor C2.
The transformer W converts 220V alternating current output by the mains supply module into low-voltage alternating current, the diode D1, the diode D2, the diode D3 and the diode D4 are rectifier diodes, the low-voltage alternating current is converted into unstable low-voltage direct current, and the unstable low-voltage direct current is converted into stable low-voltage direct current through a filter circuit consisting of the capacitor C1, the capacitor C2 and the resistor R1.
In this embodiment: referring to fig. 2, the switch module includes a resistor R2, a switch S1, and a diode D5, wherein one end of the resistor R2 is connected to the cathode of the diode D1, the other end of the resistor R2 is connected to the switch S1, and the other end of the switch S1 is connected to the anode of the diode D5.
The switch S1 is a control switch for circuit conduction, the diode D5 is a light emitting diode for prompting when the circuit is conducted, and the light emitting diode displays the circuit to be conducted.
In this embodiment: referring to fig. 2 and 3, the voltage control module includes an integrated circuit U1, a resistor R3, a capacitor C3, a transistor V1, a resistor R4, a potentiometer RP1, and a capacitor C4, a pin 8 of the integrated circuit U1 is connected to a negative electrode of a diode D5, a resistor R3, a capacitor C3, and an emitter of a transistor V1, a pin 4 of the integrated circuit U1 is connected to the other end of the resistor R3, the other end of the capacitor C3, and a base of the transistor V1, a pin 5 of the integrated circuit U1 is grounded, a pin 3 of the integrated circuit U1 is connected to a resistor R4 and a potentiometer RP1, the other end of the potentiometer RP1 is grounded, the other end of the resistor R4 is connected to a collector of the transistor V1, the capacitor C4, and the other end of the capacitor C4 is grounded.
The integrated circuit U1 is ICL8211, and ICL8211 is a bipolar monolithic integrated circuit with micropower, is mainly used for precise voltage detection and precise voltage generation, and has a precise reference voltage of 1.15V. Pin 3 of the integrated circuit U1 outputs a fixed voltage of 1.15V, so the value of the voltage VCC is { (R4+ RP1)/RP1} × 1.15V, and the change potentiometer RP1 adjusts a proper voltage to supply to the high frequency signal filtering module.
In this embodiment: referring to fig. 2, the high-frequency signal filtering module includes an input signal VIN, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C5, a capacitor C6, a capacitor C7, a transistor V2, and an output signal VOUT, where the input signal VIN is connected to the resistor R5, the other end of the resistor R5 is connected to the capacitor C5 and the resistor R6, the other end of the capacitor C5 is grounded, the other end of the resistor R6 is connected to the capacitor C6 and the resistor R7, the other end of the capacitor C6 is grounded, the other end of the resistor R7 is connected to the capacitor C7 and the non-inverting terminal of the amplifier U2, the other end of the capacitor C7 is grounded, the inverting terminal of the amplifier U2 is connected to the resistor R8, the resistor R9, the other end of the resistor R8 is grounded, the other end of the resistor R9 is connected to the output terminal of the amplifier U2, the base of the transistor V2, and the emitter of the transistor V2 is connected to the output signal VOUT.
The input signal VIN passes through a third-order active filter circuit consisting of a resistor R5, a resistor R6, a resistor R7, a capacitor C5, a capacitor C6 and a capacitor C7, high-frequency chaotic signals are effectively filtered, and the filtered demand signal is amplified twice through an amplifier U2 and a triode V2, so that the situation that the intensity of the demand signal is insufficient due to three resistors of the third-order active circuit is avoided.
The working principle of the utility model is as follows: the utility model provides a 220V alternating current is supplied with to the mains supply module, step-down rectifier filter module converts the 220V alternating current into the stable direct current of low-voltage, switch module control whole circuit switches on, step-down rectifier filter module passes through switch module output low-voltage stable direct current and gives voltage control module, voltage control module comes the suitable voltage supply high frequency signal filtering module of selective output through accurate reference voltage 1.15V, high frequency signal filtering module is through the mixed and disorderly signal of three-order active filter circuit filtering, through amplifier U2, demand signal is enlargied twice to triode V2, in effective filtering, guarantee demand signal's intensity.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A high efficiency active filter circuit, comprising:
the high-efficiency active filter circuit comprises:
the commercial power supply module is used for providing 220V alternating current;
the voltage reduction rectification filtering module is used for providing voltage reduction, rectification and filtering for the 220V alternating current and converting the voltage reduction, rectification and filtering into low-voltage direct current;
the switch module is used for controlling the conduction of the circuit;
the voltage control module is used for outputting adjustable direct current voltage;
the high-frequency signal filtering module is used for quickly stopping band attenuation and filtering unnecessary high-frequency clutter signals;
the commercial power supply module, the voltage reduction rectification filter module, the switch module, the voltage control module and the high-frequency signal filtering module are sequentially connected in series.
2. The efficient active filter circuit of claim 1, wherein the buck rectifier filter module comprises a transformer W, a diode D1, a diode D2, a diode D3, a diode D4, a capacitor C1, a capacitor C2 and a resistor R1, an input end of the transformer W is connected with the mains supply module, one end of an output end of the transformer W is connected with an anode of the diode D1 and a cathode of the diode D3, the other end of the output end of the transformer W is connected with an anode of the diode D2 and a cathode of the diode D4, a cathode of the diode D1 is connected with a cathode of the diode D2, the capacitor C1, the resistor R1 and the capacitor C2, and an anode of the diode D3 is connected with an anode of the diode D4, the other end of the capacitor C1, the other end of the resistor R1 and the other end of the capacitor C2.
3. The high-efficiency active filter circuit according to claim 1, wherein the switch module comprises a resistor R2, a switch S1 and a diode D5, one end of the resistor R2 is connected to the cathode of the diode D1, the other end of the resistor R2 is connected to the switch S1, and the other end of the switch S1 is connected to the anode of the diode D5.
4. The high-efficiency active filter circuit according to claim 1, wherein the voltage control module comprises an integrated circuit U1, a resistor R3, a capacitor C3, a transistor V1, a resistor R4, a potentiometer RP1 and a capacitor C4, a pin 8 of the integrated circuit U1 is connected with a cathode of a diode D5, a resistor R3, a capacitor C3 and an emitter of a transistor V1, a pin 4 of the integrated circuit U1 is connected with the other end of a resistor R3, the other end of a capacitor C3 and a base of a transistor V1, a pin 5 of the integrated circuit U1 is grounded, a pin 3 of the integrated circuit U1 is connected with a resistor R4 and a potentiometer RP1, the other end of the potentiometer RP1 is grounded, the other end of the resistor R4 is connected with a collector of a transistor V1, the capacitor C4, and the other end of the capacitor C4 is grounded.
5. The high-efficiency active filter circuit according to claim 4, wherein the high-frequency signal filtering module includes an input signal VIN, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C5, a capacitor C6, a capacitor C7, a transistor V2, and an output signal VOUT, the input signal VIN is connected with the resistor R5, the other end of the resistor R5 is connected with the capacitor C5 and the resistor R5, the other end of the capacitor C5 is grounded, the other end of the resistor R5 is connected with the non-inverting terminal of the capacitor C5 and the non-inverting terminal of the amplifier U5, the other end of the capacitor C5 is grounded, the inverting terminal of the amplifier U5 is connected with the resistor R5 and the base of the transistor V5, and the output signal VOUT is connected with the emitter of the transistor V5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121658103.9U CN215452517U (en) | 2021-07-21 | 2021-07-21 | Efficient active filter circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121658103.9U CN215452517U (en) | 2021-07-21 | 2021-07-21 | Efficient active filter circuit |
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| CN215452517U true CN215452517U (en) | 2022-01-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115050197A (en) * | 2022-05-11 | 2022-09-13 | 河南勇威特种设备有限公司 | Traffic signal lamp remote control device |
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2021
- 2021-07-21 CN CN202121658103.9U patent/CN215452517U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115050197A (en) * | 2022-05-11 | 2022-09-13 | 河南勇威特种设备有限公司 | Traffic signal lamp remote control device |
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