CN111464049B - Power adapter with high conversion rate and low loss rectification filter circuit - Google Patents
Power adapter with high conversion rate and low loss rectification filter circuit Download PDFInfo
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- CN111464049B CN111464049B CN202010436085.3A CN202010436085A CN111464049B CN 111464049 B CN111464049 B CN 111464049B CN 202010436085 A CN202010436085 A CN 202010436085A CN 111464049 B CN111464049 B CN 111464049B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
Abstract
The invention discloses a power adapter with a high conversion rate and low loss rectifying and filtering circuit, which comprises a main circuit, wherein a mains supply end is arranged on one side of the main circuit and is connected with a mains supply, a user end is arranged on one side of the main circuit and is connected with a user load, and a series resonance structure with adjustable resonance frequency is arranged on the main circuit. The series resonance structure with adjustable resonance frequency is a series resonance circuit with adjustable capacitance or adjustable inductance, in the series resonance, the numerical value of the capacitance or the inductance is adjusted to make the impedance of the capacitance or the inductance under specific frequency extremely small, thus, the harmonic current of the time passes through the series resonance circuit, which is equivalent to providing a short-circuit channel for the harmonic current, and the harmonic current does not pass through a user load end, thereby achieving the purpose of filtering. According to the invention, the maximum harmonic component on the urban network end is filtered in a mode of adjusting the resonant frequency, so that the power consumption quality on the user end is effectively ensured.
Description
Technical Field
The invention relates to the field of power adapters, in particular to a power adapter with a high conversion rate and low loss rectification filter circuit.
Background
A power adapter is a widely used electrical component that regulates a voltage at a local network to a suitable voltage for loading on a load and at the same time functions as a current stabilizer.
More and more power adapters are added with a filtering structure, along with more and more control devices and power factor adjusting devices on a municipal power network circuit, more and more harmonic currents on the municipal power network become power network pollution, and the harmonic currents enter user loads, cannot be used and are harmful to the devices, so that the harmonic currents on the municipal power network end should be isolated from the user loads.
In the prior art, a resonant circuit is commonly used for filtering, however, a commonly used circuit filters a harmonic wave of a certain specific frequency, but cannot generate an effect on harmonic waves of other orders, and the harmonic waves of two orders can be filtered through a circuit design, such as a double-harmonic filter circuit, however, the harmonic waves of two orders cannot be sufficiently used.
Disclosure of Invention
The invention aims to provide a power adapter with a high conversion rate and low loss rectification filter circuit to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a power adapter with high conversion rate and low loss rectifying and filtering circuit comprises a main circuit, wherein a mains supply end is arranged on one side of the main circuit and connected to a mains supply, a user end is arranged on one side of the main circuit and connected with a user load, and a series resonance structure with adjustable resonance frequency is arranged on the main circuit. Generally, a resonance circuit connected with a user can only filter harmonic waves of a certain specific frequency, a plurality of high-order harmonic waves often exist in a city network, if certain unfiltered harmonic waves reach a user end, the power conversion proportion of a power supply of the user end is influenced, loss is caused, and the service life of some high-precision components is reduced and damaged more possibly.
Furthermore, the series resonance structure with adjustable resonance frequency is a series resonance circuit with adjustable capacitance or adjustable inductance, in the series resonance, the value of the capacitance or the inductance is adjusted to make the impedance of the capacitance or the inductance under specific frequency extremely small, thus, the harmonic current of the time passes through the series resonance circuit, which is equivalent to providing a short-circuit channel for the harmonic current, and the harmonic current does not pass through a user load end, thereby achieving the purpose of filtering.
Furthermore, the main circuit is also provided with a signal circuit, the signal circuit and the position of the user terminal are in parallel connection, the signal circuit detects a plurality of high-order harmonic components on the commercial power terminal and transmits signals to the adjustable capacitor or the adjustable inductor to adjust the resonant frequency, and automatic adjustment is realized.
Furthermore, the signal circuit comprises a signal resistor and a plurality of harmonic branches, one end of the signal resistor is connected to a live wire of the main circuit, one end of the signal resistor serves as a common end of the harmonic branches, the other ends of the harmonic branches are connected to a zero line of the main circuit, branch inductors, branch capacitors and current transformers are arranged on the harmonic branches respectively, the products of the branch inductors and the branch capacitors on each harmonic branch are different and correspond to high-order harmonic frequencies respectively, and the current transformers on each harmonic branch output signal currents respectively.
Furthermore, the power adapter further comprises a comparison operator, wherein the comparison operator receives the plurality of signal currents and outputs an output current corresponding to one of the maximum effective values of the plurality of signal currents.
The resonance frequency of the resonance circuit is determined by the capacitance and inductance value, so, different capacitance inductance values are set on different harmonic branches, which can correspond to different resonance frequencies respectively, and make them equal to odd times of power frequency, thereby, different resonance currents pass through different branches, to achieve the purpose of shunting, the signal circuit can be connected in series on the main circuit, or can be in parallel relation with the user load, when in series connection, several harmonic branches of cable with very low resistance value, which are nearly short-circuited, should be used, so that it does not generate larger impedance on the main circuit, and the whole working current is reduced, when in parallel connection, a larger resistance component should be set on the main circuit of the signal circuit, so that the signal circuit does not shunt larger proportion of current from the main circuit, and the whole power is prevented from increasing, of course, when the series resonance frequency modulation is carried out on the following series resonance structure on the main circuit, the harmonic current with a part of corresponding frequency is shunted from the signal circuit, the original resonance shunted harmonic frequency is released and reloaded to the signal circuit, the resonance current on the signal circuit connected in parallel is greatly reduced, therefore, the change of magnitude value is also greatly reduced, when the signal circuit or the subsequent device judges the harmonic current with the maximum effective value, the harmonic current with sudden change of current should be limited by a certain threshold value, or a larger inductance is added on a transmission channel of the signal current, so that the change speed of the harmonic current is smaller than the current change speed on the main circuit, and therefore, the current with a smaller change speed on the harmonic branch circuit can also represent each order current at the commercial end.
As a further scheme, the adjustable capacitor comprises a shell, and a main charge plate group and an auxiliary charge plate group which are arranged in the shell, wherein two charge plates of the main charge plate group are respectively connected with a cable penetrating through the shell to serve as a first contact and a second contact, the first contact and the second contact are connected to the main circuit, the auxiliary charge plate group is arranged between the two charge plates of the main charge plate group, the auxiliary charge plate group extends out of a third contact and a fourth contact through the cable penetrating through the shell, and the third contact and the fourth contact are respectively connected with an output current and a zero line on the main circuit.
The main charge plate group is used as a functional capacitor on the main circuit, the auxiliary charge plate group generates positive and negative charges on the two plates alternately by alternating current accessed by the third contact and the fourth contact, the main charge plate group, the auxiliary charge plate group and the plate surface of the auxiliary charge plate group are opposite to each other to assist the main charge plate group to accumulate or attract more charges on the main charge plate group, and therefore the purpose of increasing the functional capacitor is achieved.
Four harmonic branches are provided and respectively correspond to third, fifth, seventh and ninth high-order harmonics.
The third, fifth, seventh and ninth higher harmonics are almost harmonic currents accounting for more than% of the urban network, and the higher-order currents are very small, so that the signal circuit does not need to be complicated for the higher-order currents, and four harmonic branches are sufficient.
As another further scheme, the adjustable capacitor comprises a shell, a main charge plate group, a conductive block, a power distribution loop and a coil, wherein the main charge plate group, the conductive block, the power distribution loop and the coil are arranged in the shell, two charge plates of the main charge plate group are respectively connected with a cable which penetrates out of the shell and is used as a first contact and a second contact, the first contact and the second contact are connected to the main circuit, the conductive block is arranged between the main charge plate group, two ends of the conductive block are connected into the power distribution loop, direct current with constant magnitude is introduced into the conductive block by the power distribution loop, the axis of the coil is vertical to the vertical direction of the connecting line direction of the two charge plates of the main charge plate group, one end of the spiral structure of the coil is adjacent to the conductive block, two electric connection ends of the coil are respectively a third contact and a fourth,
the Hall effect generates alternate charge offset directions on the conductive blocks, the more charges are accumulated on the conductive blocks towards the two sides of the main charge plate group respectively, the main charge plate group can be assisted to store more charges, and therefore the capacitance value of the adjustable capacitor is improved.
The conductive block is of an I-shaped structure, two ends of the I-shaped structure face the two charge plates of the main charge plate group respectively, and the I-shaped conductive block constructs a plate-shaped accumulation structure and can assist in accumulating more charges under the same current of the conductive block.
As another further scheme, the adjusting component of the series resonant structure is changed into an adjustable inductor. The adjustable inductor comprises a main coil and an iron core with adjustable insertion depth, the iron core is driven by the current of the harmonic component with the maximum effective value detected in the signal circuit to adjust the corresponding size, and the more the insertion is, the larger the inductance value is.
The main use process of the device is as follows: the harmonic current transmitted from the city network end is identified in the signal circuit by shunting, the current with the maximum effective value is identified, the frequency information is obtained, then digitization and signal amplification are carried out by a comparison arithmetic unit, then a current with a specific numerical value is loaded on the auxiliary charge plate group to generate attraction with the main charge plate group, the capacity of the main charge plate group for increasing or reducing the reserved charge is provided for the main charge plate group, the capacitance of the main charge plate group is changed, the resonance frequency on the main circuit is adjusted, the main circuit of the device filters the harmonic current with the maximum effective value order at any time, and the effect of automatic adjustment is achieved. Compared with the original harmonic current which can only resonate three times or five times, the device has much expanded adaptability to the current.
Compared with the prior art, the invention has the beneficial effects that: the invention identifies the harmonic current transmitted from the city network end by shunting in the signal circuit, identifies the current with the maximum effective value, acquires the frequency information, then digitalizes and amplifies the signal by the comparison arithmetic unit, then adjusts the value of the adjustable inductance or the adjustable capacitance, adjusts the resonance frequency on the main circuit, and ensures that the main circuit of the device filters the harmonic current with the maximum effective value order at any time, thereby achieving the effect of automatic adjustment. Compared with the original harmonic current which can only resonate three times or five times, the device has much expanded adaptability to the current.
Drawings
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
FIG. 1 is a schematic diagram of the overall circuit structure of the present invention;
FIG. 2 is a schematic diagram of a signal circuit according to the present invention;
FIG. 3 is a schematic diagram of a comparison operator and a tunable capacitor according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of an adjustable capacitor according to a second embodiment of the present invention.
In the figure: 1-main circuit, 2-commercial power terminal, 3-signal circuit, 31-signal resistor, 32-harmonic branch, 321-branch inductor, 322-branch capacitor, 323-current mutual inductance component, 33-signal current, 4-comparison operator, 41-output current, 5-adjustable inductor, 6-adjustable capacitor, 601-first contact, 602-second contact, 603-third contact, 604-fourth contact, 61-shell, 62-main charge plate group, 63-auxiliary charge plate group, 64-conductive block, 65-distribution loop, 66-coil and 7-user terminal.
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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a power adapter with a high conversion rate and low loss rectifying and filtering circuit comprises a main circuit 1, wherein a commercial power end 2 is arranged on one side of the main circuit 1 and is connected with a commercial power supply, a user end 7 is arranged on one side and is connected with a user load, and a series resonance structure with adjustable resonance frequency is arranged on the main circuit 1. Generally, a resonance circuit connected with a user can only filter harmonic waves of a certain specific frequency, a plurality of high-order harmonic waves often exist in the urban network, if certain unfiltered harmonic waves reach the user terminal 7, the power conversion proportion of the power supply of the user terminal is influenced, loss is caused, and the service life of some high-precision components is reduced and damaged more possibly.
The series resonance structure with adjustable resonance frequency is a series resonance circuit with an adjustable capacitor 6 or an adjustable inductor 5, in the series resonance, the numerical value of the capacitor or the inductor is adjusted to enable the impedance of the capacitor or the inductor to be extremely low under specific frequency, so that the harmonic current of the time passes through the series resonance circuit, namely, a short-circuit channel is provided for the harmonic current, and the harmonic current does not pass through a user load end, and the purpose of filtering is achieved.
The main circuit 1 is also provided with a signal circuit 3, the signal circuit 3 and a user terminal 7 are in parallel connection, the signal circuit 3 detects a plurality of high-order harmonic components on the commercial power terminal 2 and transmits signals to an adjustable capacitor or an adjustable inductor to adjust the resonant frequency, and automatic adjustment is realized.
The signal circuit 3 includes a signal resistor 31 and a plurality of harmonic branches 32, one end of the signal resistor 31 is connected to the live wire of the main circuit 1, one end is used as the common end of the harmonic branches 32, the other ends of the harmonic branches 32 are connected to the zero line of the main circuit 1, a branch inductor 321, a branch capacitor 322 and a current transformer 323 are respectively arranged on the harmonic branches 32, the products of the branch inductor 321 and the branch capacitor 322 on each harmonic branch 32 are different and respectively correspond to the harmonic frequency of the high order, and the current transformer 323 on each harmonic branch 32 respectively outputs the signal current 33.
The power adapter further comprises a comparison operator 4, the comparison operator 4 receiving the plurality of signal currents 33 and outputting an output current 41 corresponding to one of the largest effective values of the plurality of signal currents 33.
The resonant frequency of the resonant circuit is determined by the capacitance and inductance, so, different values of capacitance and inductance are set on different harmonic branches 32, which can respectively correspond to different resonant frequencies, and make them equal to odd times of power frequency, thereby, different resonant currents pass through different branches to achieve the purpose of shunting, the signal circuit 3 can be connected in series on the main circuit 1, or can be connected in parallel with the user load, when in series, several harmonic branches 32 of cable with very low resistance value, which are nearly short-circuited, should be used, so that it does not generate large impedance on the main circuit 1, and the whole working current is reduced, and when in parallel connection as in fig. 1 and 2, a large resistance component should be set on the main circuit of the signal circuit 3, so that the signal circuit 3 does not shunt large proportion of current from the main circuit 1, and the whole power is prevented from increasing, certainly, when the series resonance structure of the main circuit 1 performs resonance frequency modulation subsequently, a part of harmonic current with corresponding frequency is shunted from the signal circuit 3, and the original resonance shunted harmonic frequency is released and reloaded back to the signal circuit 3, and the resonance current of the parallel signal circuit 3 is greatly reduced, so that the change of magnitude value is greatly reduced, when the signal circuit 3 or a subsequent device performs harmonic current judgment with maximum effective value, the harmonic current with sudden change of current should be limited by a certain threshold value, or a larger inductor is added to a transmission channel of the signal current, so that the change speed of the harmonic current is smaller than the current change speed of the main circuit 1, and thus, the current with smaller change speed of the harmonic branch 32 can also represent each order current of the commercial power end.
As shown in fig. 3, the tunable capacitor 6 includes a housing 61, and a main charge plate group 62 and a sub charge plate group 63 disposed in the housing 61, two charge plates of the main charge plate group 62 are respectively connected to a cable penetrating through the housing 61 as a first contact 601 and a second contact 602, the first contact 601 and the second contact 602 are connected to the main circuit 1, the sub charge plate group 63 is disposed between two charge plates of the main charge plate group 62, the sub charge plate group 63 extends out of a third contact 603 and a fourth contact 604 through the cable penetrating through the housing 61, and the third contact 603 and the fourth contact 604 are respectively connected to the output current 41 and a zero line on the main circuit 1.
The main charge plate group 62 is used as a functional capacitor on the main circuit 1, the sub-charge plate group 63 alternately generates positive and negative charges on the two plates by alternating current accessed by the third contact 603 and the fourth contact 604, the main charge plate group 62 and the sub-charge plate group 63 face each other with the plate surface to assist the main charge plate group 62 to accumulate or attract more charges thereon, thereby achieving the purpose of increasing the functional capacitor, the magnitude of the auxiliary force provided by the sub-charge plate group 63 for the main charge plate group 62 is related to the magnitude of the current accessed by the sub-charge plate group, so that in order to adjust different functional capacitance values, a plurality of levels of currents with jumping-changing effective values are accessed on the third contact 603 and the fourth contact 604.
There are four harmonic branches 32 corresponding to the third, fifth, seventh, and ninth higher harmonics, respectively.
The third, fifth, seventh and ninth higher harmonics are almost harmonic currents which account for more than 95% of the urban network, and the higher-order currents are very small, so that the signal circuit 3 does not need to be complicated for the higher-order currents, and the four harmonic branches 32 are sufficient.
The main use process of the device is as follows: the harmonic current transmitted by the commercial network end 2 is identified in the signal circuit 3 by current shunting, the current with the maximum effective value is identified, the frequency information is obtained, then digitization and signal amplification are carried out by the comparison arithmetic unit 4, then a current with a specific numerical value is loaded on the auxiliary charge plate group 63 to attract the main charge plate group 62, the capacity of the main charge plate group 62 for increasing or reducing the reserved charge is provided for the main charge plate group 62, the capacitance of the main charge plate group 62 is changed, the resonance frequency on the main circuit 1 is adjusted, the main circuit 1 of the device filters the harmonic current with the maximum effective value order at any time, and the effect of automatic adjustment is achieved. Compared with the original harmonic current which can only resonate three times or five times, the device has much expanded adaptability to the current.
The second embodiment is as follows:
compared with the first embodiment, the difference lies in the specific arrangement of the adjustable capacitor 6:
as shown in fig. 4, the adjustable capacitor 6 includes a housing 61, and a main charge plate group 62, a conductive block 64, a distribution circuit 65 and a coil 66 disposed in the housing 61, two charge plates of the main charge plate group 62 are respectively connected to a cable penetrating through the housing 61 as a first contact 601 and a second contact 602, the first contact 601 and the second contact 602 are connected to the main circuit 1, the conductive block 64 is disposed between the main charge plate groups 62, two ends of the conductive block 64 are connected to the distribution circuit 65, the distribution circuit 65 passes a constant direct current on the conductive block 64, an axis of the coil 66 is perpendicular to a perpendicular direction of a connecting line of the two charge plates of the main charge plate group 62, one end of a spiral structure of the coil 66 is adjacent to the conductive block 64, electrical connection ends of the coil 66 are a third contact 603 and a fourth contact 604, respectively, the third contact 603 and the fourth contact 604 are connected to the output current 41 and a zero line on the main circuit 1,
the hall effect generates alternate charge offset directions on the conductive block 64, the more charges are accumulated on the conductive block 64 towards the two sides of the main charge plate group 62 respectively, the more charges can be stored in the main charge plate group 62, so that the capacitance value of the adjustable capacitor 6 is improved, on the contrary, the smaller charges are accumulated on the conductive block 64, the capacitance value of the adjustable capacitor 6 is reduced, the accumulation direction of the charges is determined according to the hall effect, as shown in the figure, the N pole of the coil 66 faces the conductive block 64, the four fingers point to the magnetic field direction, the thumb faces the current direction of the conductive block 64, and at the moment, negative charges are accumulated on the palm side.
The conductive block 64 has an i-shaped structure, two ends of the i-shaped structure face the two charge plates of the main charge plate group 62, and the i-shaped conductive block 64 forms a plate-shaped stacking structure, which can assist in stacking more charges under the same current of the conductive block 64.
The third concrete implementation mode:
compared with the first embodiment, the adjusting part of the series resonant structure is changed into the adjustable inductor 5. The adjustable inductor 5 comprises a main coil and an iron core with adjustable insertion depth, the iron core is driven by the current of the harmonic component with the maximum effective value detected in the signal circuit 3 to adjust the corresponding size, and the more the insertion, the larger the inductance value.
It will be evident to those skilled in the art that the invention 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 invention 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.
Claims (7)
1. A power adapter with high conversion rate and low loss rectification filter circuit is characterized in that: the power adapter comprises a main circuit (1), a commercial power end (2) is arranged on one side of the main circuit (1) and is connected with a commercial power supply, a user end (7) is arranged on one side of the main circuit and is connected with a user load, and a series resonance structure with adjustable resonance frequency is arranged on the main circuit (1);
the series resonance structure with the adjustable resonance frequency is a series resonance circuit with an adjustable capacitor (6) or an adjustable inductor (5);
the main circuit (1) is also provided with a signal circuit (3), the signal circuit (3) and a user terminal (7) are in parallel connection, and the signal circuit (3) detects a plurality of high-order harmonic components on a commercial power terminal (2) and transmits signals to an adjustable capacitor or an adjustable inductor to adjust the resonant frequency;
signal circuit (3) include signal resistance (31) and a plurality of harmonic branch road (32), on signal resistance (31) one end was connected to the live wire of main circuit (1), the common terminal of a plurality of harmonic branch road (32) was regarded as to one end, a plurality of the other end of harmonic branch road (32) is connected to the zero line on main circuit (1), set up branch road inductance (321), branch road electric capacity (322) and current transformer (323) on harmonic branch road (32) respectively, branch road inductance (321), branch road electric capacity (322) product on every harmonic branch road (32) are different and correspond the harmonic frequency of high order respectively, and current transformer (323) on every harmonic branch road (32) output signal current (33) respectively.
2. The power adapter with high conversion rate low loss rectifying and filtering circuit as claimed in claim 1, wherein: the power adapter further comprises a comparison operator (4), wherein the comparison operator (4) receives the signal currents (33) and outputs an output current (41) corresponding to one of the maximum effective values of the signal currents (33).
3. The power adapter with high conversion rate low loss rectifying and filtering circuit as claimed in claim 2, wherein: the adjustable capacitor (6) comprises a shell (61), a main charge plate group (62) and an auxiliary charge plate group (63) which are arranged in the shell (61), wherein two charge plates of the main charge plate group (62) are respectively connected with a cable penetrating out of the shell (61) and used as a first contact (601) and a second contact (602) outwards, the first contact (601) and the second contact (602) are connected to the main circuit (1), the auxiliary charge plate group (63) is arranged between the two charge plates of the main charge plate group (62), the auxiliary charge plate group (63) extends out of a third contact (603) and a fourth contact (604) through the cable penetrating out of the shell (61), and the third contact (603) and the fourth contact (604) are respectively connected into an output current (41) and a zero line on the main circuit (1).
4. The power adapter with high conversion rate low loss rectifying and filtering circuit as claimed in claim 2, wherein: the adjustable capacitor (6) comprises a shell (61), a main charge plate group (62), a conductive block (64), a power distribution loop (65) and a coil (66), wherein the main charge plate group (62), the conductive block (64), the power distribution loop (65) and the coil (66) are arranged in the shell (61), two charge plates of the main charge plate group (62) are respectively connected with a cable which penetrates out of the shell (61) to serve as a first contact (601) and a second contact (602), the first contact (601) and the second contact (602) are connected to the main circuit (1), the conductive block (64) is arranged between the main charge plate groups (62), two ends of the conductive block (64) are connected into the power distribution loop (65), the power distribution loop (65) conducts constant direct current on the conductive block (64), the axis of the coil (66) is perpendicular to the perpendicular direction of the connecting direction of the two charge plates of the main charge plate group (62), one end of the coil (66) in a spiral structure, the two ends of the coil (66) connected with electricity are respectively a third contact (603) and a fourth contact (604), and the third contact (603) and the fourth contact (604) are respectively connected with the output current (41) and a zero line on the main circuit (1).
5. The power adapter with high conversion rate low loss rectification filter circuit as claimed in claim 4, wherein: the conducting block (64) is of an I-shaped structure, and two ends of the I-shaped structure face the two charge plates of the main charge plate group (62) respectively.
6. The power adapter with high conversion rate low loss rectifying and filtering circuit as claimed in claim 1, wherein: four harmonic branches (32) are respectively corresponding to third, fifth, seventh and ninth high-order harmonics.
7. The power adapter with high conversion rate low loss rectifying and filtering circuit as claimed in claim 1, wherein: the adjustable inductor (5) comprises a main coil and an iron core with adjustable insertion depth.
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| CN207069890U (en) * | 2017-08-01 | 2018-03-02 | 深圳市共济科技股份有限公司 | A kind of air conditioning frequency converter side harmonics restraining device and system |
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