CN105656304A - Method for inhibiting conducted emission of PWM power supply wire by adopting time sequence isolation - Google Patents
Method for inhibiting conducted emission of PWM power supply wire by adopting time sequence isolation Download PDFInfo
- Publication number
- CN105656304A CN105656304A CN201610090464.5A CN201610090464A CN105656304A CN 105656304 A CN105656304 A CN 105656304A CN 201610090464 A CN201610090464 A CN 201610090464A CN 105656304 A CN105656304 A CN 105656304A
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- China
- Prior art keywords
- carrier
- power supply
- pwm module
- pwm
- relay
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Classifications
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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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a method for inhibiting conducted emission of a PWM power supply wire by adopting time sequence isolation. The method comprises the following steps: disconnecting the power supply to a carrier before a PWM modulation module is electrified, adding a relay to the PWM modulation module, controlling the PWM modulation module to be postponed to be electrified, and after the carrier is powered off, powering the PWM modulation module by adopting a product internal power supply. According to the method for inhibiting the conducted emission of the PWM power supply wire by adopting the time sequence isolation, the electrification time sequence of the PWM modulation module is changed by virtue of simple and feasible time sequence isolation, so that the conducted interference on the carrier is eliminated.
Description
Technical field
The present invention relates to a kind of method adopting sequential isolation to suppress PWM power line conducted emission.
Background technology
Easily there is power line conducted emission excessive problem due to big current work in PWM module, if this module being carried out the problem that redesign can cause added cost, space mounting limited location, and the frequency range that exceeds standard is wider, adds wave filter and exceed standard frequency range can not be completely eliminated. Fig. 1 is the PWM module for power supply timing diagram that prior art is taked, and sequential is: carrier is powered, and PWM module powers on, interiors of products power work, and carrier cuts off power supply. The interference signal that PWM module produces will be transmitted to carrier, during the work of PWM module, carrier platform is produced impact. As shown in Figure 2, PWM module and rear class driven equipment have carrier power supply to power by after upper electrical switch action, when certain time-delay or artificial action, relay K 2 works, relay K 1 disconnects that (disconnection of K1 is by Artificial Control, it doesn't matter with K2), PWM module and rear class driven equipment change and are worked by internal electric source.
Accordingly, it is desirable to provide a kind of new technology solves the problems referred to above.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of method adopting sequential isolation to suppress PWM power line conducted emission. The method simple possible, adopts and changes the PWM module electrifying timing sequence method causing power line conducted emission to exceed standard, and isolates the impact on carrier conduction transmitting aspect of the PWM module.
For solving the technical problem of the present invention, the technical solution used in the present invention is:
A kind of method adopting sequential isolation to suppress PWM power line conducted emission, before PWM module powers on, have been turned off carrier power, PWM module increases a relay, control PWM module delays to power on, after carrier cuts off power supply, PWM module adopts interiors of products power supply to power.
PWM module and rear class driven equipment are connected with carrier power supply by relay K 1, internal electric source is connected with PWM module by relay K 2 and diode D1, relay K 2 is increased by one group of contact, no matter whether relay K 1 works, namely whether PWM module and rear class driven equipment were powered by carrier at that time, after the control switch motion increased, relay K 1 can cut off the passage that carrier is powered immediately, changes by internal electric source powered operation.
The method changing PWM module for power supply sequential adopts time isolation technology, the method namely adopting sequencing contro, cuts off the coupling channel of interference conduction. Cutting off carrier before PWM module powers up to power, the interference signal that such PWM module produces will not be transmitted to carrier, it is achieved interference signal and the isolation of carrier, disturbs the signal impact on carrier thus cutting off.
Beneficial effects of the present invention: the present invention adopts the method suppressing PWM power line conducted emission that sequential is isolated, and is isolated by the sequential of simple possible, changes PWM module electrifying timing sequence, eliminates its Conduction Interference to carrier.
Accompanying drawing explanation
Fig. 1 is the PWM module for power supply timing diagram that prior art is taked.
Fig. 2 is the PWM module for power supply sequence circuit figure that prior art is taked.
Fig. 3 is the PWM module for power supply timing diagram of the present invention.
Fig. 4 is the PWM module for power supply sequential schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described. Following example are merely to illustrate the present invention, are not limited to protection scope of the present invention.
As shown in Figure 3, a kind of method adopting sequential isolation to suppress PWM power line conducted emission of the present invention, before PWM module powers on, have been turned off carrier power, PWM module increases a relay, control PWM module delays to power on, after carrier cuts off power supply, PWM module adopts interiors of products power supply to power.
As shown in Figure 4, PWM module and rear class driven equipment are connected with carrier power supply by relay K 1, internal electric source is connected with PWM module by relay K 2 and diode D1, relay K 2 is increased by one group of contact, no matter whether relay K 1 works, and namely whether PWM module and rear class driven equipment were powered by carrier at that time, after the control switch motion increased, relay K 1 can cut off the passage that carrier is powered immediately, changes by internal electric source powered operation.
Time isolation technology is adopted to change its power supply timing PWM module, thus eliminating the phenomenon that exceeds standard. The method can be effectively isolated the conducted emission that PWM module produces, and the interference signal that such PWM module produces would not be transmitted to carrier, it is achieved that interference signal and the isolation of carrier, meets product and the mutual compliance installing carrier.
Employing PWM module delays powers on, and after carrier cuts off power supply, PWM module adopts interiors of products power supply to power and do not adopt carrier to power, and isolates the impact on carrier platform when PWM module works.
Claims (2)
1. one kind adopts the method that sequential isolation suppresses PWM power line conducted emission, it is characterized in that: before PWM module powers on, have been turned off carrier power, PWM module increases a relay, control PWM module delays to power on, after carrier cuts off power supply, PWM module adopts interiors of products power supply to power.
2. a kind of method adopting sequential isolation to suppress PWM power line conducted emission according to claim 1, PWM module and rear class driven equipment are connected with carrier power supply by relay K 1, internal electric source is connected with PWM module by relay K 2 and diode D1, relay K 2 is increased by one group of contact, no matter whether relay K 1 works, namely whether PWM module and rear class driven equipment were powered by carrier at that time, after the control switch motion increased, relay K 1 can cut off the passage that carrier is powered immediately, changes by internal electric source powered operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610090464.5A CN105656304B (en) | 2016-02-18 | 2016-02-18 | A method of it is isolated using sequential and inhibits PWM power cord conducted emissions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610090464.5A CN105656304B (en) | 2016-02-18 | 2016-02-18 | A method of it is isolated using sequential and inhibits PWM power cord conducted emissions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105656304A true CN105656304A (en) | 2016-06-08 |
| CN105656304B CN105656304B (en) | 2018-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610090464.5A Active CN105656304B (en) | 2016-02-18 | 2016-02-18 | A method of it is isolated using sequential and inhibits PWM power cord conducted emissions |
Country Status (1)
| Country | Link |
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| CN (1) | CN105656304B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585415A (en) * | 2009-06-12 | 2009-11-25 | 四川华盛强航空地面设备有限公司 | Dual power source driving system of aviation ground equipment |
| CN102832692A (en) * | 2011-06-17 | 2012-12-19 | 哈米尔顿森德斯特兰德公司 | Intelligent electrical power distribution system |
| CN103036303A (en) * | 2012-12-10 | 2013-04-10 | 江西洪都航空工业集团有限责任公司 | Power supply switching circuit of test equipment |
| CN103296744A (en) * | 2012-02-22 | 2013-09-11 | 叶继伦 | Power source for medical equipment and power supply method for same |
| US20160028341A1 (en) * | 2014-07-22 | 2016-01-28 | Hamilton Sundstrand Corporation | Systems and methods for zero common mode voltage |
-
2016
- 2016-02-18 CN CN201610090464.5A patent/CN105656304B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585415A (en) * | 2009-06-12 | 2009-11-25 | 四川华盛强航空地面设备有限公司 | Dual power source driving system of aviation ground equipment |
| CN102832692A (en) * | 2011-06-17 | 2012-12-19 | 哈米尔顿森德斯特兰德公司 | Intelligent electrical power distribution system |
| CN103296744A (en) * | 2012-02-22 | 2013-09-11 | 叶继伦 | Power source for medical equipment and power supply method for same |
| CN103036303A (en) * | 2012-12-10 | 2013-04-10 | 江西洪都航空工业集团有限责任公司 | Power supply switching circuit of test equipment |
| US20160028341A1 (en) * | 2014-07-22 | 2016-01-28 | Hamilton Sundstrand Corporation | Systems and methods for zero common mode voltage |
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| Publication number | Publication date |
|---|---|
| CN105656304B (en) | 2018-10-12 |
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