CN202094796U - Input power supply filtering circuit device of frequency converter - Google Patents
Input power supply filtering circuit device of frequency converter Download PDFInfo
- Publication number
- CN202094796U CN202094796U CN2011201084843U CN201120108484U CN202094796U CN 202094796 U CN202094796 U CN 202094796U CN 2011201084843 U CN2011201084843 U CN 2011201084843U CN 201120108484 U CN201120108484 U CN 201120108484U CN 202094796 U CN202094796 U CN 202094796U
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- China
- Prior art keywords
- frequency converter
- input power
- common mode
- electric capacity
- mode noise
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Abstract
The utility model discloses an input power supply filtering circuit device of a frequency converter, which is characterized by comprising a differential mode noise suppression capacitor, a vertical common mode choke, a common mode noise suppression capacitor and a grounding control switch. The input power supply filtering circuit can damp the conducted interference, which is generated when a large-power switch element in the frequency converter performs high-speed switching, to an acceptable level in a required frequency bandwidth range. The vertical common mode choke can effectively improve the utilization ratio of the inner space of the frequency converter. The grounding control switch can control the level of earth leakage current.
Description
Technical field
The utility model is a kind of line unit, is specifically related to a kind of frequency converter input power filter line unit.
Background technology
General frequency converter mainly relies on and switches high-power switch device IGBT realization speed-regulating function at a high speed, and built-in Switching Power Supply also contains the MOSFET that switches at a high speed, and run duration all can produce high di/dt and dv/dt, forms interference source.These interference meetings by distributed capacitance, cable etc. conduct, radiation and coupling, influence peripheral equipment.The conducted interference that frequency converter produces generally can influence other peripheral equipment by input power cord, and input power cord also is main radiating antenna.Simultaneously, there are many sensers frequency converter inside, and extraneous interference also can influence frequency converter inner member and circuit by input power cord, and it is unusual to cause frequency converter to use.
Cutting off interference path is one of major measure that reduces conducted interference, and effective method is to increase filter circuit at the converter power supply input side.Conducted interference generally is divided into common mode disturbances and differential mode interference dual mode, and common mode choke and common mode inhibition electric capacity can reduce common mode disturbances, and differential mode inductance and differential mode suppress electric capacity can reduce differential mode interference.The frequency converter miniaturization is one of development trend, and this just causes the PCB substrate area limited, adopts vertical common mode choke can reduce the area occupied of PCB, increases space availability ratio.Common-mode noise suppresses electric capacity by being connected with the earth, provides the path of releasing to common mode disturbances, but can cause the increase of Ground leakage current, by the ground connection control switch, can control the size of Ground leakage current, satisfies different client demand.
The utility model content
The utility model provides a kind of a kind of frequency converter input power filter line unit that solves existing frequency converter interference and jamproof problem for solving the problems of the technologies described above.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A kind of frequency converter input power filter line unit is characterized in that: this device also includes differential mode noise and suppresses electric capacity, vertical common mode choke, common-mode noise inhibition electric capacity and ground connection control switch.
The further technical scheme of the utility model is that described input power supply suppresses electric capacity, common-mode noise inhibition electric capacity arrival rectification module through vertical common mode choke, differential mode noise.
The further technical scheme of the utility model is, described common mode choke adopts vertical structure, and form by manganese-zinc ferrite core, magnetic core plastic cement insulation crust and enamelled wire, plastic cement insulation crust parcel magnetic core, coiling three-phase enamelled wire on the plastic cement insulation crust, the plastic cement insulation crust is FERRITE CORE parcel and then coiling enamelled wire, between the triple line by the Plastic securing panel isolation of insulating.
The further technical scheme of the utility model is that described vertical common mode choke two ends are connected with differential mode noise and suppress electric capacity.
The further technical scheme of the utility model is that described ground connection control switch can be controlled the size of Ground leakage current.
The further technical scheme of the utility model is that described plastic cement insulation crust is by injection mo(u)lding, with upright being placed on the PCB substrate of common mode choke of FERRITE CORE and enamelled wire formation.
The beneficial effects of the utility model are as follows:
The conducted interference that input power filter circuit can switch generation at a high speed with the inner high-power switch device of frequency converter decays to acceptable level in the frequency bandwidth of demand; Vertical common mode choke can effectively improve frequency converter inner space utilance; The ground connection control switch can be controlled the size of Ground leakage current.
Description of drawings
A kind of frame diagram that Fig. 1 provides for the utility model embodiment;
A kind of structural representation that Fig. 2 provides for the utility model embodiment.
Among the figure:
(10) differential mode noise suppresses electric capacity; (20) vertical common mode choke; (30) differential mode noise suppresses electric capacity; (40) common-mode noise suppresses electric capacity; (50) ground connection control switch.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with accompanying drawing.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Referring to shown in Figure 1, a kind of frequency converter input power filter line unit comprises that differential mode noise suppresses electric capacity 10 and 30, vertical common mode choke 20, common-mode noise inhibition electric capacity 40, ground connection control switch 50; Described vertical common mode choke 20, form by manganese-zinc ferrite core, magnetic core plastic cement insulation crust and enamelled wire, plastic cement insulation crust parcel magnetic core, coiling three-phase enamelled wire on the plastic cement insulation crust then, and increase dielectric strength between the three-phase by insulating barrier; The plastic cement insulation crust is by injection mo(u)lding, with upright being placed on the PCB substrate of common mode choke of FERRITE CORE and enamelled wire formation.
In sum, the element of a kind of frequency converter input power filter circuit is selected, according to following steps:
(a) test the conducted noise curve of converter power supply incoming line in the demand frequency bandwidth when not having input power filter circuit, and this curve is decomposed into common mode conducted interference curve and differential mode conducted interference curve;
(b) topological and initial option differential mode noise inhibition electric capacity and the common-mode noise of confirming frequency converter input power filter circuit suppresses electric capacity;
(c) draw respectively the input power-supply filter and the substitutional connection of common mode noise signal when not having the input power-supply filter, and common-mode noise is inserted the equivalent equation of loss when listing the input power-supply filter and not having the input power-supply filter according to the topology of input power filter circuit;
(d) draw respectively the input power-supply filter and the substitutional connection of differential mode noise signal when not having the input power-supply filter, and differential mode noise inserts the equivalent equation of loss when listing the input power-supply filter and not having the input power-supply filter according to the topology of input power filter circuit;
(e) according to demand the noise suppressed limit value in the frequency bandwidth, when not having input power filter circuit the converter power supply incoming line in the demand frequency bandwidth common mode conducted interference curve and differential mode conducted interference curve and insert the inductance value that the loss equation is determined vertical common mode choke;
(f) after vertical common mode choke, differential mode noise inhibition electric capacity and common-mode noise inhibition capacitance are determined, again test has the frequency converter conducted interference curve of importing the power filter circuit again, the conduction limit value requirement in the frequency bandwidth if satisfy the demands, then vertical common mode choke inductance value, differential mode noise suppress capacitance and the calculating of common-mode noise inhibition capacitance is finished, if do not meet the demands, then readjust differential mode noise electric capacity or common-mode noise capacitance, recomputate, till meeting the demands.
After adopting the said apparatus structure, the conducted interference that input power filter circuit can switch generation at a high speed with the inner high-power switch device of frequency converter decays to acceptable level in the frequency bandwidth of demand; Vertical common mode choke can effectively improve frequency converter inner space utilance; The ground connection control switch can be controlled the size of Ground leakage current.
More than disclosed be the specific embodiment of this patent only, but this patent is not limited thereto, for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model principle, the distortion of making should be considered as belonging to the utility model protection range.
Claims (4)
1. a frequency converter is imported the power filter line unit, it is characterized in that: this device also includes differential mode noise and suppresses electric capacity, vertical common mode choke, common-mode noise inhibition electric capacity and ground connection control switch, the input power supply of described this device suppresses electric capacity, common-mode noise inhibition electric capacity arrival rectification module through vertical common mode choke, differential mode noise, and vertical common mode choke two ends are connected with differential mode noise and suppress electric capacity.
2. a kind of frequency converter input power filter line unit according to claim 1, it is characterized in that: described common mode choke adopts vertical structure, and form by manganese-zinc ferrite core, magnetic core plastic cement insulation crust and enamelled wire, plastic cement insulation crust parcel magnetic core, coiling three-phase enamelled wire on the plastic cement insulation crust, the plastic cement insulation crust is FERRITE CORE parcel and then coiling enamelled wire, between the triple line by the Plastic securing panel isolation of insulating.
3. a kind of frequency converter input power filter line unit according to claim 1, it is characterized in that: described ground connection control switch can be controlled the size of Ground leakage current.
4. a kind of frequency converter input power filter line unit according to claim 2, it is characterized in that: described plastic cement insulation crust is by injection mo(u)lding, with upright being placed on the PCB substrate of common mode choke of FERRITE CORE and enamelled wire formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201084843U CN202094796U (en) | 2011-04-14 | 2011-04-14 | Input power supply filtering circuit device of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201084843U CN202094796U (en) | 2011-04-14 | 2011-04-14 | Input power supply filtering circuit device of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202094796U true CN202094796U (en) | 2011-12-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201084843U Expired - Fee Related CN202094796U (en) | 2011-04-14 | 2011-04-14 | Input power supply filtering circuit device of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202094796U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9640312B2 (en) | 2014-08-19 | 2017-05-02 | General Electric Company | Multi-phase common mode choke |
| CN110456270A (en) * | 2019-08-09 | 2019-11-15 | 清华大学 | A kind of motor insulated on-line monitoring method and device |
-
2011
- 2011-04-14 CN CN2011201084843U patent/CN202094796U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9640312B2 (en) | 2014-08-19 | 2017-05-02 | General Electric Company | Multi-phase common mode choke |
| CN110456270A (en) * | 2019-08-09 | 2019-11-15 | 清华大学 | A kind of motor insulated on-line monitoring method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20140414 |