CN202713144U - Electromagnetic compatibility anti-interference system of DC (Direct Current) motor - Google Patents
Electromagnetic compatibility anti-interference system of DC (Direct Current) motor Download PDFInfo
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- CN202713144U CN202713144U CN 201220364074 CN201220364074U CN202713144U CN 202713144 U CN202713144 U CN 202713144U CN 201220364074 CN201220364074 CN 201220364074 CN 201220364074 U CN201220364074 U CN 201220364074U CN 202713144 U CN202713144 U CN 202713144U
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Abstract
The utility model discloses an electromagnetic compatibility anti-interference system of a DC (Direct Current) motor. The electromagnetic compatibility anti-interference system of the DC motor comprises a transformer, a first-level shielding line, a rectifier filter and control circuit, a first-level filter circuit, a second-level shielding line, a second-level filter circuit and the DC motor. A secondary coil of the transformer is connected with an input end of the rectifier filter and control circuit through the first-level shielding line. An output end of the rectifier filter and control circuit, passes through the second-level shielding line through the first-level filter circuit, and then is connected with a power input end of the DC motor through the second-level shielding line. The electromagnetic compatibility anti-interference system of the DC motor has strong electromagnetic interference inhibition capability and good inhabitation effect, can not only inhibit common mode and difference mode noise transferred from an electric grid and external electromagnetic radiation interference, but also prevent the DC motor from generating electromagnetic interference to surrounding electronic devices and communication systems. The electromagnetic compatibility anti-interference system of the DC motor is not only convenient to produce, but also wide in application foreground, and is reliable and practical, very low in cost and suitable for wide promotion.
Description
Technical field
The utility model relates to a kind of direct current machine electromagnetic compatibility jamproof system.
Background technology
Along with direct current machine produce and life in range of application constantly enlarge, the electromagnetic interference of direct current machine also is on the rise, effectively suppressing the direct current machine electromagnetic interference, to be not only the assurance of motor stabilizing running also be the prerequisite of other electronic equipment reliably working.Good direct current machine electromagnetic compatibility jamproof system should suppress common and different mode noise and external electromagnetic radiated interference that electrical network transmits can prevent that again direct current machine from producing electromagnetic interference to electrical network and near electronic equipment, thereby realizes that direct current machine and other electronic equipment electromagnetism are compatible.There are the following problems for direct current machine electromagnetic compatibility jamproof system of the prior art: adopt one-level common mode filtering circuit and one-level differential mode filter circuit, it is not good that electromagnetic interference suppresses inhibition limited in one's ability; Adopt non-shielding conductor transmission power supply signal, can not avoid external electromagnetic interference can be transmitted to electromagnetic interference that the next stage electronic circuit can not prevent that direct current machine from producing to externalities via non-shielding conductor by power transformer such as the noise jamming of electrical network.
Summary of the invention
The utility model is for the proposition of above problem, and develops a kind of reliable and practical direct current machine electromagnetic compatibility jamproof system.
The technical solution of the utility model is:
A kind of direct current machine electromagnetic compatibility jamproof system comprises: transformer, first order shielding conductor, rectifying and wave-filtering and control circuit, first order filter circuit, second level shielding conductor, second level filter circuit and direct current machine;
Described transformer secondary output coil is connected via the input of first order shielding conductor with rectifying and wave-filtering and control circuit; The output of described rectifying and wave-filtering and control circuit via first order filter circuit after by second level shielding conductor again via the power input that connects direct current machine behind the filter circuit of the second level;
Described first order filter circuit comprises first order differential mode filter circuit and first order common mode filtering circuit;
Described second level filter circuit comprises second level differential mode filter circuit and second level common mode filtering circuit;
Be provided with screen between the primary coil of described transformer and the secondary coil;
The screen of the screen of the screen of described transformer, first order shielding conductor, second level shielding conductor is connected shell and is connected with ground with direct current machine.
Described first order differential mode filter circuit by and the capacitor C 8 that is connected between rectifying and wave-filtering and the control circuit output consist of.
Described first order common mode filtering circuit by and the capacitor C 6, the capacitor C 7 that are connected between rectifying and wave-filtering and control circuit output and the ground consist of.
Described second level differential mode filter circuit by and be connected in that the capacitor C between the output 5 consists of between rectifying and wave-filtering and the control circuit.
Described second level common mode filtering circuit and be connected in rectifying and wave-filtering and control circuit output and ground between, formed by inductance L 1, capacitor C 1, capacitor C 2, inductance L 2, capacitor C 3, capacitor C 4; Described capacitor C 1, capacitor C 2 also are connected in composition π type filter circuit between inductance L 1 two ends and the ground; Described capacitor C 3, capacitor C 4 also are connected in composition π type filter circuit between inductance L 2 two ends and the ground.
Also comprise the direct current machine wiring board, described second level filter circuit and direct current machine are located on the direct current machine wiring board.
Owing to having adopted technique scheme, the direct current machine electromagnetic compatibility jamproof system that the utility model provides, adopt two-stage common mode filtering circuit and two-stage differential mode filter circuit, be provided with simultaneously screen between primary coil by transformer and the secondary coil and adopt shielding conductor transmission power supply signal, it is good that electromagnetic interference suppresses the strong inhibition of ability, can either suppress common and different mode noise that electrical network transmits and external electromagnetic radiated interference can prevent again direct current machine to around electronic equipment and communication system produce electromagnetic interference.The utility model is reliable and practical, not only be convenient to produce, and have a extensive future, cost is very cheap is suitable for extensive popularization.
Description of drawings
Fig. 1 is the circuit theory diagrams of direct current machine electromagnetic compatibility jamproof system described in the utility model.
Embodiment
Direct current machine electromagnetic compatibility jamproof system as shown in Figure 1 comprises: transformer, first order shielding conductor, rectifying and wave-filtering and control circuit, first order filter circuit, second level shielding conductor, second level filter circuit and direct current machine; Described transformer secondary output coil is connected via the input of first order shielding conductor with rectifying and wave-filtering and control circuit; The output of described rectifying and wave-filtering and control circuit via first order filter circuit after by second level shielding conductor again via the power input that connects direct current machine behind the filter circuit of the second level; Described first order filter circuit comprises first order differential mode filter circuit and first order common mode filtering circuit; Described second level filter circuit comprises second level differential mode filter circuit and second level common mode filtering circuit; Be provided with screen between the primary coil of described transformer and the secondary coil; The screen of the screen of the screen of described transformer, first order shielding conductor, second level shielding conductor is connected shell and is connected with ground with direct current machine; Described first order differential mode filter circuit by and the capacitor C 8 that is connected between rectifying and wave-filtering and the control circuit output consist of; Described first order common mode filtering circuit by and the capacitor C 6, the capacitor C 7 that are connected between rectifying and wave-filtering and control circuit output and the ground consist of; Described second level differential mode filter circuit by and be connected in that the capacitor C between the output 5 consists of between rectifying and wave-filtering and the control circuit; Described second level common mode filtering circuit and be connected in rectifying and wave-filtering and control circuit output and ground between, formed by inductance L 1, capacitor C 1, capacitor C 2, inductance L 2, capacitor C 3, capacitor C 4; Described capacitor C 1, capacitor C 2 also are connected in composition π type filter circuit between inductance L 1 two ends and the ground; Described capacitor C 3, capacitor C 4 also are connected in composition π type filter circuit between inductance L 2 two ends and the ground.Also comprise the direct current machine wiring board, described second level filter circuit and direct current machine are located on the direct current machine wiring board.
The direct current machine electromagnetic compatibility jamproof system that the utility model provides, adopt two-stage common mode filtering circuit and two-stage differential mode filter circuit, solve traditional filter circuit electromagnetic interference and suppressed the weak unconspicuous problem of inhibition of ability, be provided with simultaneously screen between primary coil by transformer and the secondary coil and adopt shielding conductor transmission power supply signal, can either suppress common and different mode noise that electrical network transmits and external electromagnetic radiated interference such as traditional connected mode cause the noise jamming of electrical network can prevent again by the problem that power transformer is transmitted to the next stage electronic circuit via non-shielding conductor direct current machine to around electronic equipment and communication system produce electromagnetic interference, also adopt the direct current machine wiring board that is provided with second level filter circuit and direct current machine, so that second level filter circuit absorbs and suppresses the direct current machine electromagnetic interference, arrange rationally reliable nearby.
As shown in table 1ly do not add Transformer shielding layer, first order shielding conductor, second level shielding conductor, first order filter circuit and the second level filter circuit when unloaded and add the test data of alternating current component (ripple) in magnetic field, electric field and the power supply signal of Transformer shielding layer, first order shielding conductor, second level shielding conductor, first order filter circuit and second level filter circuit for the 60W direct current machine; Electric and magnetic fields is measured and is adopted the TES-92 gaussmeter to measure, and alternating current component (ripple) adopts the TDS3052B oscilloscope measurement.
Table 1. no load test data.
The test data that does not add Transformer shielding layer, first order shielding conductor, second level shielding conductor, first order filter circuit, second level filter circuit when loading (15kg) for the 60W direct current machine and add alternating current component (ripple) in test data magnetic field, electric field and the dc power signal of Transformer shielding layer, first order shielding conductor, second level shielding conductor, first order filter circuit, second level filter circuit as shown in table 2; Electric and magnetic fields is measured and is adopted the TES-92 gaussmeter to measure, and alternating current component (ripple) adopts the TDS3052B oscilloscope measurement.
Table 2. loads test data.
Do not add the Transformer shielding layer shown in the contrast table 1, first order shielding conductor, second level shielding conductor, first order filter circuit, second level filter circuit and add the Transformer shielding layer, first order shielding conductor, second level shielding conductor, do not add the Transformer shielding layer shown in no load test data behind first order filter circuit and the second level filter circuit and the contrast table 2, first order shielding conductor, second level shielding conductor, first order filter circuit, second level filter circuit and add the Transformer shielding layer, first order shielding conductor, second level shielding conductor, first order filter circuit, loading test data behind the filter circuit of the second level can be found out, the direct current machine electromagnetic compatibility jamproof system that the utility model provides is reliable and practical, it is fairly obvious that electromagnetic interference suppresses the strong inhibition of ability, be applicable to solve door lifter, automobile, electronic toy, the electromagnetic interference problem that the multiple fields such as cutting machine exist, not only be convenient to produce, and have a extensive future, cost is very cheap to be suitable for extensive popularization.
The above; it only is the better embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection range of the present utility model.
Claims (6)
1. a direct current machine electromagnetic compatibility jamproof system is characterized in that comprising: transformer, first order shielding conductor, rectifying and wave-filtering and control circuit, first order filter circuit, second level shielding conductor, second level filter circuit and direct current machine;
Described transformer secondary output coil is connected via the input of first order shielding conductor with rectifying and wave-filtering and control circuit; The output of described rectifying and wave-filtering and control circuit via first order filter circuit after by second level shielding conductor again via the power input that connects direct current machine behind the filter circuit of the second level;
Described first order filter circuit comprises first order differential mode filter circuit and first order common mode filtering circuit;
Described second level filter circuit comprises second level differential mode filter circuit and second level common mode filtering circuit;
Be provided with screen between the primary coil of described transformer and the secondary coil;
The screen of the screen of the screen of described transformer, first order shielding conductor, second level shielding conductor is connected shell and is connected with ground with direct current machine.
2. a kind of direct current machine electromagnetic compatibility jamproof system according to claim 1, it is characterized in that described first order differential mode filter circuit by and the capacitor C 8 that is connected between rectifying and wave-filtering and the control circuit output consist of.
3. a kind of direct current machine electromagnetic compatibility jamproof system according to claim 1, it is characterized in that described first order common mode filtering circuit by and the capacitor C 6, the capacitor C 7 that are connected between rectifying and wave-filtering and control circuit output and the ground consist of.
4. a kind of direct current machine electromagnetic compatibility jamproof system according to claim 1, it is characterized in that described second level differential mode filter circuit by and be connected in that the capacitor C between the output 5 consists of between rectifying and wave-filtering and the control circuit.
5. a kind of direct current machine electromagnetic compatibility jamproof system according to claim 1, it is characterized in that described second level common mode filtering circuit and be connected in rectifying and wave-filtering and control circuit output and ground between, formed by inductance L 1, capacitor C 1, capacitor C 2, inductance L 2, capacitor C 3, capacitor C 4; Described capacitor C 1, capacitor C 2 also are connected in composition π type filter circuit between inductance L 1 two ends and the ground; Described capacitor C 3, capacitor C 4 also are connected in composition π type filter circuit between inductance L 2 two ends and the ground.
6. a kind of direct current machine electromagnetic compatibility jamproof system according to claim 1 characterized by further comprising the direct current machine wiring board, and described second level filter circuit and direct current machine are located on the direct current machine wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220364074 CN202713144U (en) | 2012-07-25 | 2012-07-25 | Electromagnetic compatibility anti-interference system of DC (Direct Current) motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220364074 CN202713144U (en) | 2012-07-25 | 2012-07-25 | Electromagnetic compatibility anti-interference system of DC (Direct Current) motor |
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| Publication Number | Publication Date |
|---|---|
| CN202713144U true CN202713144U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220364074 Expired - Fee Related CN202713144U (en) | 2012-07-25 | 2012-07-25 | Electromagnetic compatibility anti-interference system of DC (Direct Current) motor |
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| CN (1) | CN202713144U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751863A (en) * | 2012-07-25 | 2012-10-24 | 大连西赛德门控有限公司 | Electromagnetic compatibility anti-interference system of DC (Direct Current) motor |
-
2012
- 2012-07-25 CN CN 201220364074 patent/CN202713144U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751863A (en) * | 2012-07-25 | 2012-10-24 | 大连西赛德门控有限公司 | Electromagnetic compatibility anti-interference system of DC (Direct Current) motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20190725 |