CN203933368U - Three-phase alternating current filter protective circuit - Google Patents
Three-phase alternating current filter protective circuit Download PDFInfo
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- CN203933368U CN203933368U CN201420242974.6U CN201420242974U CN203933368U CN 203933368 U CN203933368 U CN 203933368U CN 201420242974 U CN201420242974 U CN 201420242974U CN 203933368 U CN203933368 U CN 203933368U
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- alternating current
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Abstract
The utility model three-phase alternating current filter protective circuit, comprises protective circuit of diode and resistance-capacitance absorption filter circuit, and described resistance-capacitance absorption filter circuit is the mode that adopts triangle to connect between three-phase.In order to prevent because the transient voltage that load variations, thunderbolt etc. cause causes damage to equipment, between every two-phase of the input of the three-phase alternating current of power equipment, seal in the diode of protection use; For the high-frequency noise jamming equipment that prevents from bringing into from the input of three-phase alternating current, between every two-phase, seal in the absorption filter circuit of resistance and electric capacity composition, in order to purify the power supply of frequency converter, equipment can reliablely and stablely be moved.Three-phase alternating current filter protective circuit disclosed in the utility model can be applicable on the three-phase alternating current input circuit such as frequency converter, so that the three-phase alternating current of input is carried out to filtering conservation treatment.
Description
Technical field
The utility model relates to a kind of three-phase alternating current filter protective circuit.
Background technology
The needed various power supplys of frequency converter work are all converted by the three-phase alternating current of frequency converter input at present, in order to make frequency converter working properly, must ensure that the three-phase alternating current of input is " totally " and " safety ".Thereby three-phase alternating current meeting at present used thereby the noise jamming of bringing into increase the fail safe of frequency converter subsequent conditioning circuit, so need to carry out filtering to the three-phase alternating current of input, purify the noise jamming that alternating current is brought into, to increase the fail safe of subsequent conditioning circuit.
Summary of the invention
The utility model object is to overcome above-mentioned the deficiencies in the prior art and a kind of three-phase alternating current filter protective circuit is provided.
The technical scheme that realizes the employing of the utility model object is: a kind of three-phase alternating current filter protective circuit, comprises protective circuit and absorb filter circuit;
Described protective circuit comprises:
Diode ZD1, ZD2 and the ZD3 of series connection, diode ZD1, the ZD2 of described series connection and ZD3 are connected between the L1 and L3 two-phase of three-phase alternating current;
Diode ZD4, ZD5 and the ZD6 of series connection, diode ZD4, the ZD5 of described series connection and ZD6 are connected between the L1 and L2 two-phase of three-phase alternating current;
Diode ZD7, ZD8 and the ZD9 of series connection, diode ZD7, the ZD8 of described series connection and ZD9 are connected between the L2 and L3 two-phase of three-phase alternating current;
Described absorption filter circuit comprises:
Capacitor C 1 and the resistance R 1 of series connection, the capacitor C 1 of described series connection and resistance R 1 are connected between the L1 and L2 two-phase of three-phase alternating current;
Capacitor C 2 and the resistance R 2 of series connection, the capacitor C 2 of described series connection and resistance R 2 are connected between the L2 and L3 two-phase of three-phase alternating current;
Capacitor C 3 and the resistance R 3 of series connection, the capacitor C 1 of described series connection and resistance R 1 are connected between the L1 and L3 two-phase of three-phase alternating current.
In technique scheme, described absorption filter circuit comprises:
Capacitor C 1 and the resistance R 1 of series connection, described capacitor C 1 is connected to the L1 phase of three-phase alternating current;
Capacitor C 2 and the resistance R 2 of series connection, described capacitor C 2 is connected to the L2 phase of three-phase alternating current;
Capacitor C 3 and the resistance R 3 of series connection, described capacitor C 3 is connected to the L3 phase of three-phase alternating current;
Described resistance R 1, resistance R 2 and resistance R 3 are connected.
The utility model between the three-phase alternating current input of frequency converter, by and connect protective circuit of diode and resistance-capacitance absorption filter circuit, increased the fail safe of frequency converter equipment, also make the working powers at different levels of frequency converter more clean, stable.Therefore,, in the equipment such as frequency converter, this circuit can ensure the clean and fail safe of input power.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model three-phase alternating current filter protective circuit.
Fig. 2 is the another kind of structural representation of the utility model three-phase alternating current filter protective circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The utility model three-phase alternating current filter protective circuit, includes protective circuit of diode and resistance-capacitance absorption filter circuit, and described resistance-capacitance absorption filter circuit is the mode that adopts triangle to connect between three-phase.In order to prevent because the transient voltage that load variations, thunderbolt etc. cause causes damage to equipment, between every two-phase of the input of the three-phase alternating current of power equipment, seal in the diode of protection use; For the high-frequency noise jamming equipment that prevents from bringing into from the input of three-phase alternating current, between every two-phase, seal in the absorption filter circuit of resistance and electric capacity composition, in order to purify the power supply of frequency converter, equipment can reliablely and stablely be moved.Three-phase alternating current filter protective circuit disclosed in the utility model can be applicable on the three-phase alternating current input circuit such as frequency converter, so that the three-phase alternating current of input is carried out to filtering conservation treatment.
The circuit connection structure of the present embodiment as shown in Figure 1, this three-phase alternating current filter protective circuit comprises the protective circuit 10 and the resistance-capacitance absorption filter circuit 20 that are constituted by a diode, wherein, the protective circuit 10 of this three-phase alternating current is made up of nine identical diodes of model specification, between L1 and L2 two-phase, seal in diode ZD4, ZD5, ZD6, between L2 and L3 two-phase, seal in diode ZD7, ZD8, ZD9, between L1 and L3 two-phase, seal in diode ZD1, ZD2, ZD3, three groups of modes that diode adopts triangle to connect, three terminals respectively with the input L1 of three-phase alternating current, L2, L3 is connected, this resistance-capacitance absorption filter circuit 20 is resistance R 1, R2, R3 and three same capacitor C 1, C2, C3s same by three, between L1 and L2 two-phase, seal in C1 and R1, between L2 and L3 two-phase, seal in C2 and R2, between L1 and L3 two-phase, seal in C3 and R3, three groups of modes that resistance-capacitance circuit adopts triangle to connect, three terminals are connected with input L1, L2, the L3 of three-phase alternating current respectively.
Because the utility model is between every two-phase of three-phase alternating current and connect protective circuit of diode and resistance capaciting absorpting circuit; when three-phase alternating current electrical input L1, L2, L3 are because some are former thereby produced the transient fluctuation of voltage; the protective circuit of diode ZD1-ZD9 composition will absorb these peak voltages; prevent that peak voltage from damaging electronic devices and components and equipment, increases the fail safe of three-phase alternating current.In the time that the high-frequency noise of bringing into from three-phase alternating current electrical input L1, L2, L3 interferes with the normal operation of equipment, the resistance-capacitance absorption filter circuit being made up of R1, R2, R3 and C1, C2, C3, will fall those high-frequency noises by absorbing and filtering, the power supply of cleaning equipment.The utility model has ensured the clean and safety of three-phase electricity, for the normal operation of equipment provides guarantee.
One of ordinary skill in the art will appreciate that, three resistance R 1, R2, R3 and three capacitor C 1, C2, the C3 that form resistance-capacitance absorption filter circuit 20 not merely limit and adopt triangle syndeton, also can adopt Y-connection structure as shown in Figure 2, in this structure, three groups of resistance and electric capacity R1 and C1, R2 and C2, R3 and C3 adopt Y-connection, its three terminals (capacitance terminal) are connected to input L1, L2 and the L3 of three-phase alternating current, and the other end (resistance terminal) is connected.
Claims (2)
1. a three-phase alternating current filter protective circuit, is characterized in that: comprise protective circuit and absorb filter circuit;
Described protective circuit comprises:
Diode ZD1, ZD2 and the ZD3 of series connection, diode ZD1, the ZD2 of described series connection and ZD3 are connected between the L1 and L3 two-phase of three-phase alternating current;
Diode ZD4, ZD5 and the ZD6 of series connection, diode ZD4, the ZD5 of described series connection and ZD6 are connected between the L1 and L2 two-phase of three-phase alternating current;
Diode ZD7, ZD8 and the ZD9 of series connection, diode ZD7, the ZD8 of described series connection and ZD9 are connected between the L2 and L3 two-phase of three-phase alternating current;
Described absorption filter circuit comprises:
Capacitor C 1 and the resistance R 1 of series connection, the capacitor C 1 of described series connection and resistance R 1 are connected between the L1 and L2 two-phase of three-phase alternating current;
Capacitor C 2 and the resistance R 2 of series connection, the capacitor C 2 of described series connection and resistance R 2 are connected between the L2 and L3 two-phase of three-phase alternating current;
Capacitor C 3 and the resistance R 3 of series connection, the capacitor C 1 of described series connection and resistance R 1 are connected between the L1 and L3 two-phase of three-phase alternating current.
2. three-phase alternating current filter protective circuit according to claim 1, is characterized in that described absorption filter circuit comprises:
Capacitor C 1 and the resistance R 1 of series connection, described capacitor C 1 is connected to the L1 phase of three-phase alternating current;
Capacitor C 2 and the resistance R 2 of series connection, described capacitor C 2 is connected to the L2 phase of three-phase alternating current;
Capacitor C 3 and the resistance R 3 of series connection, described capacitor C 3 is connected to the L3 phase of three-phase alternating current;
Described resistance R 1, resistance R 2 and resistance R 3 are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420242974.6U CN203933368U (en) | 2014-05-13 | 2014-05-13 | Three-phase alternating current filter protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420242974.6U CN203933368U (en) | 2014-05-13 | 2014-05-13 | Three-phase alternating current filter protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203933368U true CN203933368U (en) | 2014-11-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420242974.6U Active CN203933368U (en) | 2014-05-13 | 2014-05-13 | Three-phase alternating current filter protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203933368U (en) |
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2014
- 2014-05-13 CN CN201420242974.6U patent/CN203933368U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Three-phase AC filtering protection circuit Effective date of registration: 20181019 Granted publication date: 20141105 Pledgee: Huaxia Bank Limited by Share Ltd Wuhan fruit lake sub branch Pledgor: Wuhan Guide Electric Co., Ltd. Registration number: 2018420000057 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200921 Address after: 430223 D Workshop, No. 6, Polytechnic Park Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN GUIDE ELECTRIC DRIVE TECHNOLOGY Co.,Ltd. Address before: 430223 No. 6, science and engineering Park, science and engineering Park, East Lake New Technology Development Zone, Wuhan, Hubei Patentee before: WUHAN GUIDE ELECTRIC Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 430040 workshop D, no.6, ligongyuan Road, Science Park, Wuhan University of technology, Donghu Development Zone, Wuhan City, Hubei Province Patentee after: Wuhan Gangdi Technology Co.,Ltd. Address before: 430223 workshop D, no.6, ligongyuan Road, science and Technology Park, University of science and technology, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: WUHAN GUIDE ELECTRIC DRIVE TECHNOLOGY Co.,Ltd. |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210823 Granted publication date: 20141105 Pledgee: Huaxia Bank Limited by Share Ltd. Wuhan fruit lake sub branch Pledgor: WUHAN GUIDE ELECTRIC Co.,Ltd. Registration number: 2018420000057 |