JPH033189U

JPH033189U -

Info

Publication number: JPH033189U
Application number: JP6432689U
Authority: JP
Priority date: 1989-05-31
Filing date: 1989-05-31
Publication date: 1991-01-14
Anticipated expiration: 2004-05-31
Also published as: JP2539158Y2

Description

[Brief explanation of drawings]

第１図は本考案の第１の実施例の直流電源装置
を示す回路図、第２図は第１図の制御回路を示す
ブロツク図、第３図は第２の実施例の直流電源装
置を示す回路図、第４図は第３の実施例の直流電
源装置を示す回路図、第５図、第６図、第７図及
び第８図は電圧変換回路の変形例をそれぞれ示す
回路図である。１，２……入力端子、９……第１のダイオード
、１０……第２のダイオード、１２……第１の電
圧変換回路、２０……第２の電圧変換回路、２６
，２７……出力端子。 FIG. 1 is a circuit diagram showing a DC power supply device according to a first embodiment of the present invention, FIG. 2 is a block diagram showing a control circuit of FIG. 1, and FIG. 3 is a circuit diagram showing a DC power supply device according to a second embodiment of the present invention. 4 is a circuit diagram showing the DC power supply device of the third embodiment, and FIGS. 5, 6, 7, and 8 are circuit diagrams showing modified examples of the voltage conversion circuit, respectively. be. 1, 2...Input terminal, 9...First diode, 10...Second diode, 12...First voltage conversion circuit, 20...Second voltage conversion circuit, 26
, 27... Output terminal.

Claims

[Claims for Utility Model Registration] (1) A first AC voltage having a first value and a second AC voltage having a second value twice the first value are alternatively supplied. possible AC input terminals; and a DC input terminal that is required to deliver the same DC output voltage no matter which of the first and second AC voltages is applied to the AC input terminal. an output terminal; a rectifier circuit connected to the AC input terminal; and a voltage that is connected to the rectifier circuit and that is the same regardless of whether the first or second AC voltage is applied to the AC input terminal. a voltage conversion circuit configured to convert the output voltage of the rectifier circuit into different levels with a conversion ratio; and a voltage conversion circuit connected between the voltage conversion circuit and the DC output terminal, and When the first AC voltage is applied to the input terminal, the output voltage of the voltage conversion circuit is substantially doubled, but when the second AC voltage is applied to the AC input terminal, the voltage is doubled. A DC power supply device comprising a voltage doubler circuit formed so as not to convert the output voltage of the conversion circuit into a voltage doubler. (2) a pair of AC inputs to which a first AC voltage having a first value and a second AC voltage having a second value twice the first value may be alternatively supplied; A pair of DC output terminals that are required to output the same DC output voltage regardless of whether the first or second AC voltage is applied to the terminals; and the pair of AC input terminals. a first diode connected to one of the pair of AC input terminals for passing only the positive half-wave of the AC voltage; and a first diode connected to one of the pair of AC input terminals for passing only the negative half-wave of the AC voltage. a second diode, connected to the cathode of the first diode and the other of the pair of AC input terminals, and configured to output a positive DC output to the pair of DC output terminals with reference to the other AC input terminal; one of the AC input terminals, and has the same voltage conversion ratio regardless of which of the first and second AC voltages is applied to the pair of AC input terminals, and corresponds to the positive half wave or the positive half wave. a first voltage conversion circuit configured to convert a voltage into a different voltage level; a first voltage conversion circuit connected to the anode of the second diode and the other AC input terminal; The voltage is formed to apply a negative DC output to the other of the pair of DC output terminals based on a reference, and the same voltage is applied regardless of which of the first and second AC voltages is applied to the pair of AC input terminals. a second voltage conversion circuit configured to convert the negative half-wave or a voltage corresponding thereto to a different voltage level with a conversion ratio; and an anode connected to the other AC input terminal. a third diode whose anode is connected to the other DC output terminal, and a fourth diode whose cathode is connected to the other AC input terminal; and a fourth diode whose anode is connected to the other AC input terminal; a first and second capacitor connected between the terminals, and a connection midpoint between the third and fourth diodes and a midpoint between the first and second capacitors. and a voltage switching switch that is turned on when the first AC voltage is applied to the AC input terminal and turned off when the second AC voltage is applied to the AC input terminal. DC power supply. (3) a pair of AC input terminals to which a first AC voltage having a first value and a second AC voltage twice the first value may be alternatively supplied; a pair of DC output terminals that are required to output the same DC output voltage regardless of which of the first and second AC voltages is applied to the AC input terminals of the pair; a positive terminal connected to the AC input terminal and generating a voltage corresponding to a positive half wave of the AC voltage applied to the pair of AC input terminals; and a positive terminal generating a voltage corresponding to a negative half wave of the AC voltage applied to the pair of AC input terminals. a rectifier circuit having a negative terminal and an intermediate terminal having a potential intermediate between the positive terminal and the negative terminal; a positive output terminal connected to one of the pair of DC output terminals and a positive output terminal connected to the other of the pair of DC output terminals; having a negative output terminal connected to these intermediate output terminals;
The positive half wave or the voltage corresponding thereto obtained between the positive terminal and the intermediate terminal of the rectifier circuit is converted to a different level, and the positive output terminal, the intermediate negative terminal, and the intermediate terminal are The negative half wave or a voltage corresponding to the negative half wave obtained between the output terminals and the intermediate terminal is converted to a different level and applied between the negative output terminal and the intermediate terminal, and the output terminal is connected to the pair of AC input terminals. a voltage conversion circuit configured to operate at substantially the same voltage conversion ratio no matter which of the first and second AC voltages is applied;
a first diode having an anode connected to the intermediate output terminal and a cathode connected to the positive output terminal; and a second diode having an anode connected to the negative output terminal and a cathode connected to the intermediate output terminal. diodes, first and second capacitors connected in series with each other and connected between the positive output terminal and the negative output terminal, and a mutual connection point of the first and second diodes. and a mutual connection point of the first and second capacitors, and is turned on when the first AC voltage is applied to the AC input terminal, and the first AC voltage is connected to the AC input terminal. A DC power supply device equipped with a voltage switching switch that is turned off when the AC voltage of No. 2 is applied. (4) an AC input terminal to which a first AC voltage having a first value and a second AC voltage having a second value twice the first value may be alternatively supplied; , when the first AC voltage is applied, a voltage doubler rectified output is generated, and the second AC voltage is applied to the AC input terminal.
a voltage doubler rectifier circuit formed to generate a non-doubled voltage rectifier output when an alternating current voltage of
The voltage doubler rectifier circuit and the voltage conversion circuit configured to operate at substantially the same voltage conversion ratio regardless of whether the first or second AC voltage is applied to the DC output terminal. DC power supply.