Title:
CONSTANT-VOLTAGE POWER SUPPLY
Document Type and Number:
Japanese Patent JP3300761
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To use a constant-voltage power supply even in the case of different AC voltage used while miniaturizing the power supply, and to prevent the fluctuation of output voltage even to the fluctuation of input voltage.
SOLUTION: A peak-value voltage cut circuit 11 cuts a peak value section of 100 V or higher in input AC voltage of 100-260 V, and outputs AC voltage, from which the cut section is removed. A transformer 12 steps down AC voltage of 100 V outputted from the peak-value voltage cut circuit 11 to voltage of 16 V. The first rectifier 13 rectifies AC voltage stepped down to voltage of 16 V output from the transformer 12, and outputs pulsating voltage of 16 V. A smoothing capacitor 14 smoothes pulsating voltage of 16 V output from the first rectifier 13, and outputs DC voltage of 16 V.
Inventors:
Sanji Yoshimura
Application Number:
JP19843899A
Publication Date:
July 08, 2002
Filing Date:
July 13, 1999
Export Citation:
Assignee:
Japan Maki Line Industrial Co., Ltd.
International Classes:
H02M7/04; (IPC1-7): H02M7/04
Domestic Patent References:
| JP1198842A | ||||
| JP951260A | ||||
| JP7322619A | ||||
| JP6131831A | ||||
| JP63181694A | ||||
| JP5695709U |
Attorney, Agent or Firm:
Shigenori Wada