JPH02129190U

JPH02129190U -

Info

Publication number: JPH02129190U
Application number: JP3644089U
Authority: JP
Priority date: 1989-03-31
Filing date: 1989-03-31
Publication date: 1990-10-24

Description

[Brief explanation of drawings]

第１図は本考案に係るスイツチグレギユレータ
の一実施例を示す回路図、第２図は本考案の他の
実施例を示す回路図、第３図は従来のスイツチグ
レギユレータを示す回路図である。３……商用交流電源、８，１４……整流回路、
１０，１２……出力端子、１３……リレー、１５
……制御回路、１６……スイツチ回路、１７……
入力端子、Ｒ１，Ｒ４……抵抗、Ｄ５〜Ｄ８……
ダイオード、Ｃ１，Ｃ５〜Ｃ７……コンデンサ、
Ｑ３……スイツチングトランジスタ、Ｔ３……ト
ランス。 Fig. 1 is a circuit diagram showing one embodiment of a switch regulator according to the present invention, Fig. 2 is a circuit diagram showing another embodiment of the invention, and Fig. 3 is a circuit diagram showing a conventional switch regulator. FIG. 3... Commercial AC power supply, 8, 14... Rectifier circuit,
10, 12...Output terminal, 13...Relay, 15
...Control circuit, 16...Switch circuit, 17...
Input terminal, R1, R4...Resistor, D5~D8...
Diode, C1, C5-C7...Capacitor,
Q3...Switching transistor, T3...Transformer.

Claims

[Claims for Utility Model Registration] (1) A first rectifier circuit that rectifies a commercial AC voltage and outputs a first DC voltage; a second rectifier circuit that outputs a second DC voltage at a level lower than the first DC voltage; an anode connected to the output end of the second rectifier circuit and a cathode connected to the output end of the first rectifier circuit; a transformer having a primary winding, a feedback winding, and first and second secondary windings and supplying the first or second DC voltage to the primary winding; and the feedback winding. a switching transistor that turns on and off based on the voltage generated in the line to control the current flowing through the primary winding; and a switching transistor that controls the current flowing through the primary winding based on the voltage generated in the line; and the energy released from the first and second secondary windings during the off period of the switching transistor. third and fourth rectifier circuits capable of rectifying the main power supply voltage and outputting the main power supply voltage and the auxiliary power supply voltage, respectively; and when obtaining only the auxiliary power supply voltage, supplying the commercial AC voltage to the first rectification circuit; and a switch circuit that stops output of the DC voltage from the third rectifier circuit. (2) a rectifier circuit that rectifies a commercial AC voltage and outputs a DC voltage; a transformer that has a primary winding and first and second secondary windings, and the DC voltage is supplied to the primary winding; a switching transistor whose collector-emitter path is connected in series with the primary winding and whose base is supplied with a drive signal of a predetermined period to turn on and off to control the current flowing through the primary winding; a third rectifier circuit capable of outputting a main power supply voltage by rectifying the voltage generated in the first secondary winding based on the on/off state of the switching transistor; a fourth rectifier circuit capable of outputting an auxiliary power supply voltage by rectifying the voltage generated in the winding; an oscillator circuit that generates a drive signal to be applied to the base of the switching transistor; and when obtaining the auxiliary power supply voltage; a switch circuit that stops outputting the DC voltage from the third rectifier circuit; and an oscillation frequency switching circuit that switches the oscillation frequency of the oscillation circuit between when obtaining the auxiliary power supply voltage and when obtaining the main power supply voltage. The Switch Regulator is characterized by the following: