51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Monday, March 30th, 2009 at 16:08 | No comments

Categories: Power Supply

Tags: EMC, EMI, Switching power supply

Short Content:    1 introduction 　　The correspondence switching power supply uses the pulse width to modulate the (PWM) technology generally, its characteristic is the frequency is high, the efficiency is high, the power density is high, the reliability is high, in addition has the volume to be small, the weight light, has merits and so on long-distance monitoring, therefore widely is applied in the stored program controlled switching, the light data transmission, the wireless base depot, the wired television system and in ...

Wednesday, January 14th, 2009 at 09:45 | No comments

Categories: Power Supply

Tags: DC/DC, electromagnetic compatibility, EMC

Short Content: Introduction < ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> The DC-DC switch is the communications system's source of power, has achieved the widespread application in the correspondence domain. Because has the high-frequency, the wideband and the high efficiency density, its oneself is a formidable electromagnetic interference (EMI) the source, is serious when periphery will cause the electronic installation function disorder, will cause the communications system transmission data error, to present the unusual engine off and the warning and so on, ...

Sunday, December 14th, 2008 at 21:09 | No comments

Categories: Power Supply

Tags: EMC

Short Content:     Abstract: Through to Buck the converter electric circuit's EMC analysis, explained in the electromagnetic compatibility technologies and so on filter, earth, cushion as well as reasonable PCB design in switching power supply's application.     Key word: Switching power supply; Electromagnetic compatibility; Electromagnetism harassment; Electromagnetic interference; Coupling channel Introduction The switching power supply recently effectively controlled the output voltage and the electric current size through the change switch component's breakover. Usually it works under several dozens kHz above turn-on frequency, ...

Sunday, December 14th, 2008 at 16:09 | No comments

Categories: Power Supply

Tags: EMC

Short Content:     Abstract: Introduced one kind uses the passive power factor adjustment method to reduce the power source harmonic content the plan. The experimental result indicated that this plan cost is low, the performance is good, easy to achieve each item of EMC standard, suits in the low power power source.     Key word: Power factor adjustment; Electromagnetic compatibility; Harmonic suppression Introduction In order to reduce to exchanges electrical network's overtone pollution, had already promoted some limiting current overtone standard, if ...