【発明の名称】両方向性調整電圧路を組込んでいるD.C.チョッパ調整方法および装置

Japanese Patent JP3369621

B2

An unregulated D.C. input volgage (VIN) is processed by a high power chopper (34,36) to produce a first chopped signal having the same voltage as the input voltage (VIN), and by a low power chopper (56,58) to produce a second chopped signal in synchronism with and having a lower voltage than the first chopped signal. The first and second chopped signals are algebraically combined by transformers (52,54) to produce an A.C. output signal which may be converted to D.C. (VOUT). The second chopped signal may be controlled to have the same polarity relative to the first chopped signal in which case the voltages add to increase the output voltage (VOUT), or to have the opposite polarity relative to the first chopped signal in which case the voltages substract to decrease the output voltage (VOUT). The periods of addition and subtraction are alternated within the period of the first chopped signal. The ratio of addition and subtraction of the second chopped signal may be varied to adjust the ratio of output voltage to input voltage over a wide range. An energy storage inductor (62) is provided in the high power chopper path to average the voltage addition and subtraction. The high power chopper operation may be intermittently interrupted to limit input current flow during startup, and switches (102,104) are provided to discharge energy stored in the inductor (62) into the transformers (52,54) and thereby contribute to the output voltage (VOUT).

Thomas K. Phelps
Khan The Le
Gilbert I. Cardwell, Jr.

JP4290593A

January 20, 2003

March 03, 1993

Click for automatic bibliography generation  

Hughes Electronics Corporation

H02M3/28; H02M3/337; H02M7/06; H02M7/12; (IPC1-7): H02M3/28; H02M7/06

JP1109880A
JP3284166A
JP2246773A
JP412667A
JP515148A
JP5304772A
JP5176535A
JP4712449B1

Takehiko Suzue (3 outside)

Previous Patent: 焼却灰の固結方法

Next Patent: 半導体装置の製造方法