CN105656304B - A method of it is isolated using sequential and inhibits PWM power cord conducted emissions - Google Patents
A method of it is isolated using sequential and inhibits PWM power cord conducted emissions Download PDFInfo
- Publication number
- CN105656304B CN105656304B CN201610090464.5A CN201610090464A CN105656304B CN 105656304 B CN105656304 B CN 105656304B CN 201610090464 A CN201610090464 A CN 201610090464A CN 105656304 B CN105656304 B CN 105656304B
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- China
- Prior art keywords
- modulation module
- pwm modulation
- power supply
- carrier
- 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 kind of methods that inhibition PWM power cord conducted emissions being isolated using sequential, carrier power supply is had been turned off before PWM modulation module powers on, increase a relay in PWM modulation module, control PWM modulation module delays power on, after carrier, which is cut off, powers, PWM modulation module uses interiors of products power supply power supply.The present invention is isolated by the sequential of simple possible using the method for the inhibition PWM power cord conducted emissions of sequential isolation, is changed PWM modulation module electrifying timing sequence, eliminate its Conduction Interference to carrier.
Description
Technical field
The present invention relates to a kind of methods that inhibition PWM power cord conducted emissions being isolated using sequential.
Background technology
PWM modulation module is since high current work is susceptible to power cord conducted emission excessive problem, if to the module
It carries out redesigning the problem that added cost, space installation site can be caused limited, and exceeded frequency range is wider, adds filter not
Exceeded frequency range can be completely eliminated.Fig. 1 is the PWM modulation module for power supply timing diagram that the prior art is taken, and sequential is：Carrier supplies
Electricity, PWM modulation module power on, interiors of products power work, carrier cut-out power supply.The interference signal that PWM modulation module generates is just
It can be transmitted to carrier, PWM modulation module has an impact carrier platform when working.As shown in Fig. 2, PWM modulation module and rear class
Driven equipment has carrier power supply power supply after being acted by upper electrical switch, in the case of certain time-delay or artificial action, relay
Device K2 work, relay K1 are disconnected（The disconnection of K1 is not related with K2 by manual control）, PWM modulation module and rear class are driven
Dynamic equipment changes to be worked by internal electric source.
Accordingly, it is desirable to provide a kind of new technology solves the above problems.
Invention content
The technical problem to be solved in the invention be to provide it is a kind of be isolated using sequential inhibit PWM power cord conducted emissions
Method.This method simple possible, the PWM modulation module electrifying timing sequence method for causing power cord conducted emission exceeded using change,
PWM modulation module is isolated to the influence in terms of carrier conduction transmitting.
To solve the technical problem of the present invention, the technical solution adopted by the present invention is：
A method of it is isolated using sequential and inhibits PWM power cord conducted emissions, is had been turned off before PWM modulation module powers on
Carrier is powered, and increases a relay in PWM modulation module, and control PWM modulation module delays power on, and power when carrier is cut off
Afterwards, PWM modulation module uses interiors of products power supply power supply.
PWM modulation module and rear class driven equipment are connect by relay K1 with carrier power supply, internal electric source by after
Electric appliance K2 and diode D1 are connect with PWM modulation module, and relay K2 is increased by one group of contact, no matter relay K1 whether work
Make, i.e., whether PWM modulation module and rear class driven equipment were powered by carrier at that time, after increased control switch motion, after
Electric appliance K1 can cut off the channel of carrier power supply immediately, change by internal electric source powered operation.
The method for changing PWM modulation module for power supply sequential uses time isolation technology, that is, the method for using timing control to cut
Trunk snap disturbs the coupling channel of conduction.The cut-out carrier power supply before PWM modulation module powers up, such PWM modulation module generate dry
Carrier will not be transmitted to by disturbing signal, and realization interference signal is isolated with carrier, to cut off influence of the interference signal to carrier.
Beneficial effects of the present invention：The present invention is passed through using the method for the inhibition PWM power cord conducted emissions of sequential isolation
The sequential of simple possible is isolated, and is changed PWM modulation module electrifying timing sequence, is eliminated its Conduction Interference to carrier.
Description of the drawings
Fig. 1 is the PWM modulation module for power supply timing diagram that the prior art is taken.
Fig. 2 is the PWM modulation module for power supply sequence circuit figure that the prior art is taken.
Fig. 3 is the PWM modulation module for power supply timing diagram of the present invention.
Fig. 4 is the PWM modulation module for power supply sequential schematic diagram of the present invention.
Specific implementation mode
The invention will be further described in the following with reference to the drawings and specific embodiments.Following embodiment is merely to illustrate this hair
It is bright, it is not limited to protection scope of the present invention.
As shown in figure 3, the method for inhibiting PWM power cord conducted emissions is isolated using sequential by a kind of of the present invention, in PWM tune
Molding block has been turned off carrier power supply before powering on, increase a relay in PWM modulation module, controls PWM modulation module delays
It powers on, after carrier, which is cut off, powers, PWM modulation module uses interiors of products power supply power supply.
As shown in figure 4, PWM modulation module and rear class driven equipment are connect by relay K1 with carrier power supply, it is internal
Power supply is connect by relay K2 and diode D1 with PWM modulation module, and relay K2 is increased by one group of contact, no matter relay
Whether K1 works, i.e., whether PWM modulation module and rear class driven equipment were powered by carrier at that time, dynamic in increased control switch
After work, relay K1 can cut off the channel of carrier power supply immediately, change by internal electric source powered operation.
Its power supply timing is changed using time isolation technology to PWM modulation module, to eliminate exceeded phenomenon.This method energy
It is effectively isolated the conducted emission of PWM modulation module generation, the interference signal that such PWM modulation module generates would not be transmitted to load
Body realizes being isolated for interference signal and carrier, meets product and installs the mutual compliance of carrier.
It is powered on using PWM modulation module delays, after carrier, which is cut off, powers, PWM modulation module uses interiors of products power supply
Power supply using carrier without being powered, influence when isolation PWM modulation module works to carrier platform.
Claims (1)
1. a kind of the method for inhibiting PWM power cord conducted emissions being isolated using sequential, it is characterised in that：In PWM modulation module
Carrier power supply is had been turned off before electricity, increases a relay in PWM modulation module, and control PWM modulation module delays power on, and work as load
After body cut-out power supply, PWM modulation module uses interiors of products power supply power supply；PWM modulation module and rear class driven equipment pass through
Relay K1 is connect with carrier power supply, and internal electric source is connect by relay K2 and diode D1 with PWM modulation module, by relay
Device K2 increases by one group of contact, and no matter whether relay K1 works, i.e., PWM modulation module and rear class driven equipment whether at that time by
Carrier is powered, and after increased control switch motion, relay K1 can cut off the channel of carrier power supply immediately, change 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 CN105656304A (en) | 2016-06-08 |
| CN105656304B true 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 (4)
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (4)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105656304A (en) | 2016-06-08 |
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