CN102570783A - Design method of filter at output end of frequency converter - Google Patents
Design method of filter at output end of frequency converter Download PDFInfo
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- CN102570783A CN102570783A CN 201010621496 CN201010621496A CN102570783A CN 102570783 A CN102570783 A CN 102570783A CN 201010621496 CN201010621496 CN 201010621496 CN 201010621496 A CN201010621496 A CN 201010621496A CN 102570783 A CN102570783 A CN 102570783A
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- filter
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- filter circuit
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Abstract
The invention relates to filter technology, in particular relates to a design method of a filter at an output end of a frequency converter. The filter comprises a shielding shell, wherein nickel is plated on the surface of the shielding shell, and three groups of filter circuits are arranged inside the shielding shell provided with the filter circuits. The design method is characterized in that each group of filter circuit comprises two serially-connected common mode inductors which are electrically connected, the two common mode inductors in each group of filter circuit are wound on an iron core in a common mode manner, input and output wiring terminals of the three group of filter circuits are fixed on two sides of the shielding shell provided with filter circuits by using insulation terminals; and the two common mode inductors of each group of filter circuit are connected in series to form a pure-inductance common mode filter network, and the common mode inductors are made of non-crystalline nano metal materials in a winding manner. According to the design method, influences and interference on normal working of a system due to electromagnetic conducting of the output end of the frequency converter through a cable are reduced.
Description
Technical field
The present invention relates to a kind of wave filter technology, relate in particular to a kind of inverter output terminal Filter Design method that is used for.
Background technology
In control system, along with being widely used of power electronic equipments such as frequency converter, the electromagnetic interference (EMI) of system is serious day by day, and corresponding Anti-interference Design technology (being electromagnetic compatibility EMC) has become more and more important.The interference of frequency convertor system can directly cause the hardware damage of system sometimes, though can not damage the hardware of system sometimes, often makes the system program operation of microprocessor out of control, causes Control Failure, thereby causes equipment and production accident.Therefore, the antijamming capability and the reliability that how to improve system are very important important contents in automation equipment development and the application, also are one of keys of Computer Control Technology application and popularization.
Summary of the invention
The purpose of this invention is to provide a kind of inverter output terminal Filter Design method that is used for, influence its system's operate as normal through the cable Conducted Electromagnetic Interference so that reduce inverter output terminal.
The present invention gives realization through following technical proposals; A kind of inverter output terminal Filter Design method that is used for; Comprise that a plating nickel on surface is equipped with the shield shell of filter circuit; Filter circuit is installed in the inside of the shield shell that filter circuit is housed, and it is characterized in that: filter circuit comprises three groups, and every group is electrically connected to form by two common mode inductances that are connected in series; Two common mode inductances of every group are wound on the iron core with common mode, and three groups of filter circuit input and output binding posts are fixed on the both sides of the shield shell that filter circuit is housed with insulated terminal.
Two said every group common mode inductance series connection constitute the common-mode filter network of pure induction reactance, and described common mode inductance is that the coiling of amorphous state sodium rice metal material forms.
Advantage of the present invention is the mode of connection that the filter input/output terminal adopts general double-screw bolt; The filter internal circuit is made up of the common-mode filter network of pure induction reactance two common mode inductance series connection; The inversion pipe of avoiding frequency converter is at conducting (shutoff) moment infringement inversion pipe; Common mode inductance is formed by the lower amorphous state sodium rice metal material coiling of cut-off frequency, can weaken the high order harmonic component composition in the output current effectively.Not only play jamproof effect, and can weaken the additional torque that causes by the high order harmonic component harmonic current in the motor.The antijamming capability of raising system and reliability are applicable to the filtering of inverter output terminal cable.Characteristics with versatility.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is circuit theory diagrams among the embodiment.
Fig. 2 is the outline drawing among the embodiment.
Among the figure: 1, common mode inductance; 2, iron core; 3, filter input wires terminal; 4, shield shell; 5, filter output wiring terminal.
Embodiment
As depicted in figs. 1 and 2, a kind of inverter output terminal Filter Design method that is used for comprises that a plating nickel on surface is equipped with the shield shell 4 of filter circuit; Filter circuit is installed in the inside of the shield shell 4 that filter circuit is housed, and filter circuit comprises three groups, L1-L1 '; L2-L2 '; L3-L3 ', three groups of filter circuit L1-L1 ', L2-L2 '; L3-L3 ' is electrically connected to form by two common mode inductances that are connected in series 1; Two common mode inductances 1 of every group are wound on the iron core 2 with common mode, and three groups of filter circuit inputs are electrically connected with the filter input wires terminal 3 of shield shell 4 one sides, and three groups of filter circuit outputs are electrically connected with the filter output wiring terminal 5 of shield shell 4 opposite sides.The filter input and output terminal adopts the mode of connection of general double-screw bolt, and the filter internal circuit adopts pure induction reactance mode, and the amorphous state sodium rice metal material coiling lower by cut-off frequency forms, and can weaken the high order harmonic component composition in the output current effectively.Not only play jamproof effect, and can weaken the additional torque that causes by the high order harmonic component harmonic current in the motor.The antijamming capability of raising system and reliability are applicable to the filtering of inverter output terminal cable.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.
Claims (2)
1. one kind is used for inverter output terminal Filter Design method; Comprise that a plating nickel on surface is equipped with the shield shell of filter circuit; Filter circuit is installed in the inside of the shield shell that filter circuit is housed, and it is characterized in that: filter circuit comprises three groups, and every group is electrically connected to form by two common mode inductances that are connected in series; Two common mode inductances of every group are wound on the iron core with common mode, and three groups of filter circuit input and output binding posts are fixed on the both sides of the shield shell that filter circuit is housed with insulated terminal.
2. a kind of inverter output terminal Filter Design method that is used for according to claim 1; It is characterized in that: two said every group common mode inductance series connection constitute the common-mode filter network of pure induction reactance, and described common mode inductance is that the coiling of amorphous state sodium rice metal material forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010621496 CN102570783A (en) | 2010-12-20 | 2010-12-20 | Design method of filter at output end of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010621496 CN102570783A (en) | 2010-12-20 | 2010-12-20 | Design method of filter at output end of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102570783A true CN102570783A (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010621496 Pending CN102570783A (en) | 2010-12-20 | 2010-12-20 | Design method of filter at output end of frequency converter |
Country Status (1)
| Country | Link |
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| CN (1) | CN102570783A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983828A (en) * | 2012-11-26 | 2013-03-20 | 西安开容电子技术有限责任公司 | Filter of impulse power output port of motor speed controller |
| CN111478575A (en) * | 2020-04-30 | 2020-07-31 | 北京理工大学 | Design method of high-voltage power supply electromagnetic interference filter |
| CN111478576A (en) * | 2020-04-30 | 2020-07-31 | 北京理工大学 | Filter design method |
-
2010
- 2010-12-20 CN CN 201010621496 patent/CN102570783A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983828A (en) * | 2012-11-26 | 2013-03-20 | 西安开容电子技术有限责任公司 | Filter of impulse power output port of motor speed controller |
| CN111478575A (en) * | 2020-04-30 | 2020-07-31 | 北京理工大学 | Design method of high-voltage power supply electromagnetic interference filter |
| CN111478576A (en) * | 2020-04-30 | 2020-07-31 | 北京理工大学 | Filter design method |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |