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

Wednesday, April 15th, 2009 at 15:59 | No comments

Categories: Power Supply

Tags: Battery charger, hard, Soft switch, Switching power supply

Short Content: Abstract: First introduced the soft switch and the hard switch's elementary knowledge, then gives the electric train accessory power supply newest 10kVA battery charger's main circuit design, introduced and analyzes this kind of new battery charger soft switch to realize the method and the design matters needing attention, this product through national Ministry of Railways's each experiment, moved in official clear Qinghai-Tibet Highway's each new train.Key word: Charge; Soft switch; Hard switch; Accessory power supply 0 introductions    The modern electric ...

Friday, April 3rd, 2009 at 15:08 | No comments

Categories: Power Supply

Tags: Entire bridge, Inversion, inversion welding machine, Soft switch, zero class switch, zero pressure switch

Short Content: Abstract: Introduced one kind the contravariant welding machine's design proposal which and the principle of work uses the soft switch technology to realize, this technology reduced the power component's switching loss, raised the contravariant welding machine's efficiency.Key word: Soft switch; Inversion; Contravariant welding machine; Zero pressure switch; Zero class switch; Entire bridge O introduction    The contravariant welding machine technology has experienced near ten year development, substituted the backward power frequency thyristor rectification technology to enter the high frequency transformation time ...

Thursday, January 29th, 2009 at 08:53 | No comments

Categories: Power Supply

Tags: Converter, Rises the voltage dropping, Soft switch, synchronization rectification

Short Content: Abstract: Studied one kind of soft switch synchronization to rise the voltage dropping converter. This liter voltage dropping converter's filter inductance designs quite slightly, causes in the inductance the electric current to be possible to be reverse, separately carries on the charging and discharging through the forward current and the reverse electrical current to two synchronized electric valve's junction capacitance, for soft switch creation nai. This method is suitable in compares the low pressure output, the high power density situation. ...

Friday, December 5th, 2008 at 22:09 | No comments

Categories: Power Supply

Tags: Soft switch

Short Content:    Abstract: Proposed one kind of novel FLYBACK the converter ZVS soft switch realizes the plan. A small auxiliary transformer and the main transformer series, through enables the auxiliary transformer primary side initiation inductance electric current bidirectional to achieve the main switch tube's ZVS soft switch condition. This plan has realized the main auxiliary switching valve's ZVS soft switch, has limited the output rectification diode shuts off when di/dt, and causes the converter in any load situation, can realize the ...

Thursday, September 11th, 2008 at 16:45 | No comments

Categories: SCM

Tags: C8051, PCA, phase shifting PWM, Soft switch

Short Content: Abstract: Realizes the soft switch through C8051 monolithic integrated circuit's programmable counter array PCA with the phase shifting PWM trigger pulse, the experimental result indicated has the PWM wave debugging through this law to be convenient, the movement is reliable, may apply in many kinds of soft switching circuits.Key word: Soft switch; Phase shifting PWM:C8051 0 introductions    The soft switch technology already obtained thorough, the extensive research in recent years and develops rapidly. But in each kind of soft switching ...