CN211266480U - Control circuit of harmonic protector - Google Patents
Control circuit of harmonic protector Download PDFInfo
- Publication number
- CN211266480U CN211266480U CN201922082065.6U CN201922082065U CN211266480U CN 211266480 U CN211266480 U CN 211266480U CN 201922082065 U CN201922082065 U CN 201922082065U CN 211266480 U CN211266480 U CN 211266480U
- Authority
- CN
- China
- Prior art keywords
- electrically connected
- inductor
- capacitor
- resistor
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model discloses a control circuit of harmonic protector, including zero line N, ground wire PE, control circuit still includes first pressure-sensitive circuit, second pressure-sensitive circuit, third pressure-sensitive circuit, wherein first pressure-sensitive circuit with second pressure-sensitive circuit is parallelly connected, wherein first pressure-sensitive circuit with third pressure-sensitive circuit is parallelly connected, wherein second pressure-sensitive circuit with third pressure-sensitive circuit is parallelly connected; the first pressure-sensitive circuit is also electrically connected with the first three-phase filter circuit, the second pressure-sensitive circuit is electrically connected with the second three-phase filter circuit, and the third pressure-sensitive circuit is electrically connected with the third three-phase filter circuit; the utility model provides a pulse peak frequency channel that current harmonic protector reply does not have the technical problem of protection effect more than 20 MHz.
Description
Technical Field
The utility model relates to a control circuit of harmonic protector.
Background
Harmonic interference (above 1 kHz) of higher frequency bands is embodied as zero-crossing noise, PLC program operation error, data error, time error, crash, failure-free restart and even permanent damage.
The harmonic protector can absorb harmonic interference of 1kHz and higher frequency range, eliminates the harmonic at a generating source, and automatically eliminates interference such as random higher harmonic, high-frequency noise, pulse spike, surge and the like generated on electric equipment. Therefore, the harmonic protector can purify a power supply, protect electric equipment and power factor compensation equipment and prevent the false tripping of the protection device, thereby protecting the safe, stable and reliable operation of the equipment.
The pulse peak frequency range which can be dealt with by the harmonic protector at present is between 1KHz and 20MHz, and the protection effect is almost not provided above 20 MHz.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that the pulse peak frequency channel that current harmonic protector reply does not have the technical problem of protection effect more than 20MHz, provides a control circuit of harmonic protector.
In order to solve the technical problem, the utility model provides a following technical scheme:
a control circuit of a harmonic protector comprises a zero line N and a ground line PE, and further comprises a first pressure-sensitive circuit, a second pressure-sensitive circuit and a third pressure-sensitive circuit, wherein the first pressure-sensitive circuit is connected with the second pressure-sensitive circuit in parallel, the first pressure-sensitive circuit is connected with the third pressure-sensitive circuit in parallel, and the second pressure-sensitive circuit is connected with the third pressure-sensitive circuit in parallel; the first pressure-sensitive circuit is also electrically connected with the first three-phase filter circuit, the second pressure-sensitive circuit is electrically connected with the second three-phase filter circuit, and the third pressure-sensitive circuit is electrically connected with the third three-phase filter circuit.
Preferably, the first voltage-sensitive circuit comprises a first voltage-sensitive resistor RV1, a first inductor L1 and a fourth inductor L4, wherein one end of the first voltage dependent resistor RV1 is electrically connected to the ground PE, the other end of the first voltage dependent resistor RV1 is electrically connected to one end of the first resistor R1, one end of the first inductor L1, one end of the fourth capacitor C4, and one end of the fourth inductor L4, wherein the other end of the first resistor R1 is electrically connected to the first LED D1 via a tenth capacitor C10, the first light emitting diode D1 is electrically connected with the neutral wire N, the first light emitting diode D1 is connected with the fourth diode D4 in parallel, wherein one end of the first inductor L1 is electrically connected to one end of the first capacitor C1 and one end of the fourth resistor R4 respectively, the other end of the first capacitor C1 is electrically connected to the neutral line N, and the other end of the fourth resistor R4 is electrically connected to the other end of the fourth capacitor C4; the other end of the fourth inductor L4 is electrically connected to the neutral line N through a seventh capacitor C7.
Preferably, the second voltage-sensitive circuit comprises a second voltage-sensitive resistor RV2, a second inductor L2 and a fifth inductor L5, wherein one end of the second varistor RV2 is electrically connected to the ground PE, the other end of the second varistor RV2 is electrically connected to one end of the second resistor R2, one end of the second inductor L2, one end of the fifth capacitor C5, and one end of the fifth inductor L5, wherein the other end of the second resistor R2 is electrically connected to the second LED D2 via the eleventh capacitor C11, the second light emitting diode D2 is electrically connected with the zero line N, the second light emitting diode D2 is connected with the fifth diode D5 in parallel, wherein one end of the second inductor L2 is electrically connected to one end of the second capacitor C2 and one end of the fifth resistor R5 respectively, the other end of the second capacitor C2 is electrically connected to the neutral line N, and the other end of the fifth resistor R5 is electrically connected to the other end of the fifth capacitor C5; the other end of the fifth inductor L5 is electrically connected to the neutral line N through an eighth capacitor C8.
Preferably, the third voltage-sensitive circuit comprises a third voltage-sensitive resistor RV3, a third inductor L3 and a sixth inductor L6, one end of the third varistor RV3 is electrically connected to the ground PE, the other end of the third varistor RV3 is electrically connected to one end of the third resistor R3, one end of the third inductor L3, one end of the sixth capacitor C6, and one end of the sixth inductor L6, wherein the other end of the third resistor R3 is electrically connected to the first LED D1 via a twelfth capacitor C12, the first light emitting diode D1 is electrically connected with the neutral wire N, the first light emitting diode D1 is connected with the sixth diode D6 in parallel, wherein one end of the third inductor L3 is electrically connected to one end of the third capacitor C3 and one end of the sixth resistor R6 respectively, the other end of the third capacitor C3 is electrically connected to the neutral line N, and the other end of the sixth resistor R6 is electrically connected to the other end of the sixth capacitor C6; the other end of the sixth inductor L6 is electrically connected to the neutral line N through a ninth capacitor C9.
Preferably, the first three-phase filter circuit includes a third inductor L3 and a fourth inductor L4, wherein one end of the third inductor L3 is electrically connected to one end of a third capacitor C3, one end of the fourth inductor L4 and one end of the first inductor L1, respectively, the other end of the third inductor L3 is electrically connected to one end of a sixth capacitor C6 and one end of a seventh resistor R7, wherein the other end of the sixth capacitor C6 is electrically connected to the zero line N and one end of a seventh capacitor C7, respectively, and the other end of the seventh capacitor C7 is electrically connected to the other end of the fourth inductor L4; the other end of the seventh resistor R7 is electrically connected to the other end of the third capacitor C3.
Preferably, the second three-phase filter circuit includes a fifth inductor L5 and a sixth inductor L6, wherein one end of the fifth inductor L5 is electrically connected to one end of a fourth capacitor C4, one end of the sixth inductor L6 and one end of the second inductor L2, respectively, the other end of the fifth inductor L5 is electrically connected to one end of an eighth capacitor C8 and one end of an eighth resistor R8, wherein the other end of the eighth capacitor C8 is electrically connected to the zero line N and one end of a ninth capacitor C9, respectively, and the other end of the ninth capacitor C9 is electrically connected to the other end of the sixth inductor L6; the other end of the eighth resistor R8 is electrically connected to the other end of the fourth capacitor C4.
Preferably, the third three-phase filter circuit includes a seventh inductor L7 and an eighth inductor L8, wherein one end of the seventh inductor L7 is electrically connected to one end of a fifth capacitor C5, one end of the eighth inductor L8 and one end of a third inductor L3, respectively, the other end of the seventh inductor L7 is electrically connected to one end of a tenth capacitor C10 and one end of a ninth resistor R9, wherein the other end of the tenth capacitor C10 is electrically connected to the zero line N and one end of an eleventh capacitor C11, respectively, and the other end of the eleventh capacitor C11 is electrically connected to the other end of the eighth inductor L8; the other end of the ninth resistor R9 is electrically connected to the other end of the fifth capacitor C5.
Preferably, the control circuit further comprises a power-off alarm circuit which is electrically connected with the first pressure-sensitive circuit, the second pressure-sensitive circuit and the third pressure-sensitive circuit respectively.
Preferably, the power-loss alarm circuit comprises a fifth voltage regulator tube D5, a sixth voltage regulator tube D6, an eleventh voltage regulator tube D11 and a second resistor R2, wherein one end of the second resistor R2 is electrically connected with one end of a twelfth capacitor C12 and a pin a of a photoelectric coupler respectively, and a pin K of the photoelectric coupler is electrically connected with the other end of the fifth voltage regulator tube D5, the other end of the sixth voltage regulator tube D6, the other end of the eleventh voltage regulator tube D11, the other end of the twelfth capacitor C12 and the neutral line N respectively; the photoelectric coupler is also electrically connected with the pin header P3; the other end of the second resistor R2 is electrically connected to one end of a fifth voltage regulator D5, one end of a sixth voltage regulator D6, one end of an eleventh voltage regulator D11, and the LED cathode, the LED anode is electrically connected to a tenth resistor R10, a first resistor R1, and a fourth resistor R4, wherein the tenth resistor R10 is electrically connected to the first inductor L1 through an eighth diode D8, the first resistor R1 is electrically connected to the second inductor L2 through a first diode D1, and the fourth resistor R4 is electrically connected to the third inductor L3 through a third diode D3.
The utility model discloses the beneficial effect who reaches is:
the utility model realizes the high-efficiency inhibition and absorption of the interference of higher harmonic wave above 20MHz, high-frequency noise, pulse peak, surge and the like; the utility model can track the voltage in real time and correct the voltage and current waveform which are distorted due to the harmonic wave; the utility model comprehensively overcomes the harmonic interference of higher frequency band, and reduces the failure rate of the electric equipment and the misoperation of the machine; the device of the utility model hardly consumes power, and has ultrahigh economic benefit; the utility model discloses a wiring is simple, and installation and debugging are convenient.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a main control circuit diagram of the present invention;
fig. 2 is a three-phase filter circuit diagram of the present invention;
fig. 3 is a circuit diagram of the power-off alarm of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1 to fig. 3, a control circuit of a harmonic protector includes a neutral line N and a ground line PE, and further includes a first voltage-sensitive circuit, a second voltage-sensitive circuit, and a third voltage-sensitive circuit, where the first voltage-sensitive circuit is connected in parallel with the second voltage-sensitive circuit, the first voltage-sensitive circuit is connected in parallel with the third voltage-sensitive circuit, and the second voltage-sensitive circuit is connected in parallel with the third voltage-sensitive circuit; the first pressure-sensitive circuit is also electrically connected with the first three-phase filter circuit, the second pressure-sensitive circuit is electrically connected with the second three-phase filter circuit, and the third pressure-sensitive circuit is electrically connected with the third three-phase filter circuit.
In this embodiment, as shown in fig. 1, the first voltage-dependent circuit includes a first voltage-dependent resistor RV1, a first inductor L1, and a fourth inductor L4, wherein one end of the first voltage-dependent resistor RV1 is electrically connected to the ground PE, the other end of the first voltage-dependent resistor RV1 is electrically connected to one end of a first resistor R1, one end of a first inductor L1, one end of a fourth capacitor C4, and one end of a fourth inductor L4, respectively, wherein the other end of the first resistor R1 is electrically connected to a first light-emitting diode D1 through a tenth capacitor C10, the first light-emitting diode D1 is electrically connected to the neutral line N, the first light-emitting diode D1 is connected to a fourth diode D4 in parallel, wherein one end of the first inductor L1 is electrically connected to one end of a first capacitor C1 and one end of the fourth resistor R4, respectively, and the other end of the first capacitor C1 is electrically connected to the neutral line N, the other end of the fourth resistor R4 is electrically connected with the other end of the fourth capacitor C4; the other end of the fourth inductor L4 is electrically connected to the neutral line N through a seventh capacitor C7. The second voltage-sensitive circuit comprises a second voltage-sensitive resistor RV2, a second inductor L2 and a fifth inductor L5, wherein one end of the second varistor RV2 is electrically connected to the ground PE, the other end of the second varistor RV2 is electrically connected to one end of the second resistor R2, one end of the second inductor L2, one end of the fifth capacitor C5, and one end of the fifth inductor L5, wherein the other end of the second resistor R2 is electrically connected to the second LED D2 via the eleventh capacitor C11, the second light emitting diode D2 is electrically connected with the zero line N, the second light emitting diode D2 is connected with the fifth diode D5 in parallel, wherein one end of the second inductor L2 is electrically connected to one end of the second capacitor C2 and one end of the fifth resistor R5 respectively, the other end of the second capacitor C2 is electrically connected to the neutral line N, and the other end of the fifth resistor R5 is electrically connected to the other end of the fifth capacitor C5; the other end of the fifth inductor L5 is electrically connected to the neutral line N through an eighth capacitor C8. The third voltage-sensitive circuit comprises a third voltage-sensitive resistor RV3, a third inductor L3 and a sixth inductor L6, one end of the third varistor RV3 is electrically connected to the ground PE, the other end of the third varistor RV3 is electrically connected to one end of the third resistor R3, one end of the third inductor L3, one end of the sixth capacitor C6, and one end of the sixth inductor L6, wherein the other end of the third resistor R3 is electrically connected to the first LED D1 via a twelfth capacitor C12, the first light emitting diode D1 is electrically connected with the neutral wire N, the first light emitting diode D1 is connected with the sixth diode D6 in parallel, wherein one end of the third inductor L3 is electrically connected to one end of the third capacitor C3 and one end of the sixth resistor R6 respectively, the other end of the third capacitor C3 is electrically connected to the neutral line N, and the other end of the sixth resistor R6 is electrically connected to the other end of the sixth capacitor C6; the other end of the sixth inductor L6 is electrically connected to the neutral line N through a ninth capacitor C9.
In this embodiment, as shown in fig. 2, the first three-phase filter circuit includes a third inductor L3 and a fourth inductor L4, wherein one end of the third inductor L3 is electrically connected to one end of a third capacitor C3, one end of the fourth inductor L4 and one end of a first inductor L1, respectively, the other end of the third inductor L3 is electrically connected to one end of a sixth capacitor C6 and one end of a seventh resistor R7, wherein the other end of the sixth capacitor C6 is electrically connected to the neutral line N and one end of a seventh capacitor C7, respectively, and the other end of the seventh capacitor C7 is electrically connected to the other end of the fourth inductor L4; the other end of the seventh resistor R7 is electrically connected to the other end of the third capacitor C3. The second three-phase filter circuit comprises a fifth inductor L5 and a sixth inductor L6, wherein one end of the fifth inductor L5 is electrically connected with one end of a fourth capacitor C4, one end of the sixth inductor L6 and one end of a second inductor L2 respectively, the other end of the fifth inductor L5 is electrically connected with one end of an eighth capacitor C8 and one end of an eighth resistor R8, the other end of the eighth capacitor C8 is electrically connected with the zero line N and one end of a ninth capacitor C9 respectively, and the other end of the ninth capacitor C9 is electrically connected with the other end of the sixth inductor L6 respectively; the other end of the eighth resistor R8 is electrically connected to the other end of the fourth capacitor C4. The third three-phase filter circuit comprises a seventh inductor L7 and an eighth inductor L8, wherein one end of the seventh inductor L7 is electrically connected with one end of a fifth capacitor C5, one end of the eighth inductor L8 and one end of a third inductor L3 respectively, the other end of the seventh inductor L7 is electrically connected with one end of a tenth capacitor C10 and one end of a ninth resistor R9, wherein the other end of the tenth capacitor C10 is electrically connected with one end of the neutral line N and one end of an eleventh capacitor C11 respectively, and the other end of the eleventh capacitor C11 is electrically connected with the other end of the eighth inductor L8 respectively; the other end of the ninth resistor R9 is electrically connected to the other end of the fifth capacitor C5.
From the single-phase design, the first order low-pass filter composed of L3C 3R 7C 6 has the low frequency range of 1KHz-20 MHz. A is the output terminal and N is the input terminal.
And the second-stage filtering is composed of L4C 7, and the high frequency band of the second-stage filtering is 20KHz-100 MHz.
Transfer function
Frequency characteristic
The low-pass filter is characterized in that the damping coefficient zeta is determined by the ratio of resistances L3, L4, C6 and C7; the natural frequency ω 0 is related to specific values of L3, L4, C6 and C7, i.e., ω 0 and ζ are independently adjustable and do not affect each other.
In this embodiment, as shown in fig. 3, the control circuit further includes a power-off alarm circuit electrically connected to the first voltage-sensitive circuit, the second voltage-sensitive circuit, and the third voltage-sensitive circuit, respectively. The power-loss alarm circuit comprises a fifth voltage-regulator tube D5, a sixth voltage-regulator tube D6, an eleventh voltage-regulator tube D11 and a second resistor R2, wherein one end of the second resistor R2 is electrically connected with one end of a twelfth capacitor C12 and a pin A of a photoelectric coupler respectively, and a pin K of the photoelectric coupler is electrically connected with the other end of the fifth voltage-regulator tube D5, the other end of the sixth voltage-regulator tube D6, the other end of the eleventh voltage-regulator tube D11, the other end of the twelfth capacitor C12 and the zero line N respectively; the photoelectric coupler is also electrically connected with the pin header P3; the other end of the second resistor R2 is electrically connected to one end of a fifth voltage regulator D5, one end of a sixth voltage regulator D6, one end of an eleventh voltage regulator D11, and the LED cathode, the LED anode is electrically connected to a tenth resistor R10, a first resistor R1, and a fourth resistor R4, wherein the tenth resistor R10 is electrically connected to the first inductor L1 through an eighth diode D8, the first resistor R1 is electrically connected to the second inductor L2 through a first diode D1, and the fourth resistor R4 is electrically connected to the third inductor L3 through a third diode D3.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a control circuit of harmonic protector, includes zero line N, ground wire PE, its characterized in that: the control circuit further comprises a first pressure sensitive circuit, a second pressure sensitive circuit, a third pressure sensitive circuit, wherein the first pressure sensitive circuit is connected in parallel with the second pressure sensitive circuit, wherein the first pressure sensitive circuit is connected in parallel with the third pressure sensitive circuit, wherein the second pressure sensitive circuit is connected in parallel with the third pressure sensitive circuit; the first pressure-sensitive circuit is also electrically connected with the first three-phase filter circuit, the second pressure-sensitive circuit is electrically connected with the second three-phase filter circuit, and the third pressure-sensitive circuit is electrically connected with the third three-phase filter circuit.
2. The control circuit of a harmonic protector of claim 1, wherein: the first voltage-sensitive circuit comprises a first voltage-sensitive resistor RV1, a first inductor L1 and a fourth inductor L4, wherein one end of the first voltage dependent resistor RV1 is electrically connected to the ground PE, the other end of the first voltage dependent resistor RV1 is electrically connected to one end of the first resistor R1, one end of the first inductor L1, one end of the fourth capacitor C4, and one end of the fourth inductor L4, wherein the other end of the first resistor R1 is electrically connected to the first LED D1 via a tenth capacitor C10, the first light emitting diode D1 is electrically connected with the neutral wire N, the first light emitting diode D1 is connected with the fourth diode D4 in parallel, wherein one end of the first inductor L1 is electrically connected to one end of the first capacitor C1 and one end of the fourth resistor R4 respectively, the other end of the first capacitor C1 is electrically connected to the neutral line N, and the other end of the fourth resistor R4 is electrically connected to the other end of the fourth capacitor C4; the other end of the fourth inductor L4 is electrically connected to the neutral line N through a seventh capacitor C7.
3. The control circuit of a harmonic protector of claim 1, wherein: the second voltage-sensitive circuit comprises a second voltage-sensitive resistor RV2, a second inductor L2 and a fifth inductor L5, wherein one end of the second varistor RV2 is electrically connected to the ground PE, the other end of the second varistor RV2 is electrically connected to one end of the second resistor R2, one end of the second inductor L2, one end of the fifth capacitor C5, and one end of the fifth inductor L5, wherein the other end of the second resistor R2 is electrically connected to the second LED D2 via the eleventh capacitor C11, the second light emitting diode D2 is electrically connected with the zero line N, the second light emitting diode D2 is connected with the fifth diode D5 in parallel, wherein one end of the second inductor L2 is electrically connected to one end of the second capacitor C2 and one end of the fifth resistor R5 respectively, the other end of the second capacitor C2 is electrically connected to the neutral line N, and the other end of the fifth resistor R5 is electrically connected to the other end of the fifth capacitor C5; the other end of the fifth inductor L5 is electrically connected to the neutral line N through an eighth capacitor C8.
4. The control circuit of a harmonic protector of claim 1, wherein: the third voltage-sensitive circuit comprises a third voltage-sensitive resistor RV3, a third inductor L3 and a sixth inductor L6, one end of the third varistor RV3 is electrically connected to the ground PE, the other end of the third varistor RV3 is electrically connected to one end of the third resistor R3, one end of the third inductor L3, one end of the sixth capacitor C6, and one end of the sixth inductor L6, wherein the other end of the third resistor R3 is electrically connected to the first LED D1 via a twelfth capacitor C12, the first light emitting diode D1 is electrically connected with the neutral wire N, the first light emitting diode D1 is connected with the sixth diode D6 in parallel, wherein one end of the third inductor L3 is electrically connected to one end of the third capacitor C3 and one end of the sixth resistor R6 respectively, the other end of the third capacitor C3 is electrically connected to the neutral line N, and the other end of the sixth resistor R6 is electrically connected to the other end of the sixth capacitor C6; the other end of the sixth inductor L6 is electrically connected to the neutral line N through a ninth capacitor C9.
5. A control circuit for a harmonic protector as claimed in claim 2, wherein: the first three-phase filter circuit comprises a third inductor L3 and a fourth inductor L4, wherein one end of the third inductor L3 is electrically connected with one end of a third capacitor C3, one end of the fourth inductor L4 and one end of a first inductor L1 respectively, the other end of the third inductor L3 is electrically connected with one end of a sixth capacitor C6 and one end of a seventh resistor R7, the other end of the sixth capacitor C6 is electrically connected with one end of a zero line N and one end of a seventh capacitor C7 respectively, and the other end of the seventh capacitor C7 is electrically connected with the other end of the fourth inductor L4 respectively; the other end of the seventh resistor R7 is electrically connected to the other end of the third capacitor C3.
6. A control circuit for a harmonic protector as claimed in claim 3, wherein: the second three-phase filter circuit comprises a fifth inductor L5 and a sixth inductor L6, wherein one end of the fifth inductor L5 is electrically connected with one end of a fourth capacitor C4, one end of the sixth inductor L6 and one end of a second inductor L2 respectively, the other end of the fifth inductor L5 is electrically connected with one end of an eighth capacitor C8 and one end of an eighth resistor R8, wherein the other end of the eighth capacitor C8 is electrically connected with one end of the zero line N and one end of a ninth capacitor C9 respectively, and the other end of the ninth capacitor C9 is electrically connected with the other end of the sixth inductor L6 respectively; the other end of the eighth resistor R8 is electrically connected to the other end of the fourth capacitor C4.
7. The control circuit of a harmonic protector of claim 4, wherein: the third three-phase filter circuit comprises a seventh inductor L7 and an eighth inductor L8, wherein one end of the seventh inductor L7 is electrically connected with one end of a fifth capacitor C5, one end of the eighth inductor L8 and one end of a third inductor L3 respectively, the other end of the seventh inductor L7 is electrically connected with one end of a tenth capacitor C10 and one end of a ninth resistor R9, wherein the other end of the tenth capacitor C10 is electrically connected with one end of the neutral line N and one end of an eleventh capacitor C11 respectively, and the other end of the eleventh capacitor C11 is electrically connected with the other end of the eighth inductor L8 respectively; the other end of the ninth resistor R9 is electrically connected to the other end of the fifth capacitor C5.
8. The control circuit of a harmonic protector of claim 4, wherein: the control circuit further comprises a power-off alarm circuit which is electrically connected with the first pressure-sensitive circuit, the second pressure-sensitive circuit and the third pressure-sensitive circuit respectively.
9. A control circuit for a harmonic protector as claimed in claim 8, wherein: the power-loss alarm circuit comprises a fifth voltage-regulator tube D5, a sixth voltage-regulator tube D6, an eleventh voltage-regulator tube D11 and a second resistor R2, wherein one end of the second resistor R2 is electrically connected with one end of a twelfth capacitor C12 and a pin A of a photoelectric coupler respectively, and a pin K of the photoelectric coupler is electrically connected with the other end of the fifth voltage-regulator tube D5, the other end of the sixth voltage-regulator tube D6, the other end of the eleventh voltage-regulator tube D11, the other end of the twelfth capacitor C12 and the zero line N respectively; the photoelectric coupler is also electrically connected with the pin header P3; the other end of the second resistor R2 is electrically connected to one end of a fifth voltage regulator D5, one end of a sixth voltage regulator D6, one end of an eleventh voltage regulator D11, and the LED cathode, the LED anode is electrically connected to a tenth resistor R10, a first resistor R1, and a fourth resistor R4, wherein the tenth resistor R10 is electrically connected to the first inductor L1 through an eighth diode D8, the first resistor R1 is electrically connected to the second inductor L2 through a first diode D1, and the fourth resistor R4 is electrically connected to the third inductor L3 through a third diode D3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922082065.6U CN211266480U (en) | 2019-11-28 | 2019-11-28 | Control circuit of harmonic protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922082065.6U CN211266480U (en) | 2019-11-28 | 2019-11-28 | Control circuit of harmonic protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211266480U true CN211266480U (en) | 2020-08-14 |
Family
ID=71990305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922082065.6U Active CN211266480U (en) | 2019-11-28 | 2019-11-28 | Control circuit of harmonic protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211266480U (en) |
-
2019
- 2019-11-28 CN CN201922082065.6U patent/CN211266480U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2394853C (en) | A three stage power conditioning circuit | |
| AU748193C (en) | Power conditioning circuit | |
| RU2570351C1 (en) | Network filter | |
| CN203951382U (en) | The inverter circuit of electric power secondary system driver module | |
| CN211266480U (en) | Control circuit of harmonic protector | |
| US7446436B2 (en) | Waveform correction filters | |
| CN208480006U (en) | DC/DC conversion circuit, circuit board and LED display device | |
| CN210007388U (en) | high-frequency harmonic suppression device for flexible direct-current power transmission system | |
| US20180342943A1 (en) | Grounding scheme for power conversion system | |
| CN207994622U (en) | Lightning protection anti electrostatic protects circuit, communicating circuit, Switching Power Supply and electronic equipment | |
| RU2381614C1 (en) | Power filter (versions) | |
| CN208507167U (en) | Power factor correction circuit, circuit board and LED display device | |
| CN114400906A (en) | Radiation-resistant three-phase capacitor parallel piezoresistor rectifying circuit | |
| CN207542993U (en) | A kind of power circuit with power factor | |
| CN2571049Y (en) | Filtration type power supply lightning protector | |
| CN106532673B (en) | A kind of surge protecting circuit and surge protector | |
| JP2011199979A (en) | Lightning surge protection circuit for electronic apparatus | |
| CN211959079U (en) | Boost circuit with surge protection group, switching power supply and protection system | |
| KR20190113318A (en) | Surge protect device of three phase power with four lines capable of powerline communications | |
| CN211830567U (en) | Lightning protection filtering power supply circuit | |
| CN208608899U (en) | DC/DC conversion circuit, circuit board and LED display device | |
| CN211481179U (en) | Multifunctional direct current motor power supply circuit | |
| CN203951372U (en) | The driver module of electric power secondary system | |
| CN203951179U (en) | The anti-jamming circuit of electric power secondary system driver module | |
| CN208445807U (en) | LED power supply circuit, circuit board and LED display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |