JPS6188495U

JPS6188495U -

Info

Publication number: JPS6188495U
Application number: JP17075884U
Authority: JP
Priority date: 1984-11-09
Filing date: 1984-11-09
Publication date: 1986-06-09
Also published as: JPH0226234Y2

Description

[Brief explanation of drawings]

第１図はこの考案の実施例の電源回路図、第２
図は従来例の電源回路図、第３図、第４−ａ図お
よび第４−ｂ図はそれぞれ第２図の従来例の電源
回路の作用を説明する等価回路図、第５図は他の
従来例の電源回路図、第６−ａ図および第６−ｂ
図はそれぞれ第５図の従来例電源回路の動作を説
明する等価回路、第７図は第５図の電源回路のコ
ンデンサの充放電特性図、第８図および第９図は
それぞれこの考案の他の実施例のブロツク図であ
る。１は商用電源、１ａは電源スイツチ、２ａは１
次巻線、２ｃは中間タツプ、２ｂは２次巻線、３
は整流回路、４ａ，４ｂはそれぞれコンデンサー
、４は平滑回路、６はチヨークコイル、８ｂはス
イツチである。 Figure 1 is a power supply circuit diagram of an embodiment of this invention, Figure 2
The figure is a power supply circuit diagram of a conventional example, Figures 3, 4-a and 4-b are equivalent circuit diagrams explaining the operation of the conventional power supply circuit of Figure 2, and Figure 5 is an equivalent circuit diagram of another power supply circuit. Conventional power supply circuit diagram, Figures 6-a and 6-b
The figures show an equivalent circuit explaining the operation of the conventional power supply circuit shown in Fig. 5, Fig. 7 shows the charging and discharging characteristics of the capacitor in the power supply circuit shown in Fig. 5, and Figs. FIG. 2 is a block diagram of an embodiment of the invention. 1 is the commercial power supply, 1a is the power switch, 2a is 1
The next winding, 2c is the intermediate tap, 2b is the secondary winding, 3
is a rectifier circuit, 4a and 4b are capacitors, 4 is a smoothing circuit, 6 is a choke coil, and 8b is a switch.

Claims

[Claims for Utility Model Registration] 1. At least a primary winding 2a to be connected to a commercial power source 1 via a power switch 1a, a secondary winding 2b connected to a rectifier circuit 3, and the secondary winding. 2
a power supply transformer 2 having an intermediate tap 2c formed at b, a rectifier circuit 3 connected to the secondary winding 2b, and two transformers connected to the rectifier circuit 3 and connected in series between at least the rectifier outputs. a smoothing circuit 4 consisting of capacitors 4a and 4b, an intermediate tap 2c of the secondary winding and the capacitors 4a and 4;
In a power supply circuit equipped with a check coil 6 connected between a mutual connection point of the switch 8b, a switch 8b is provided to short-circuit both ends of the check coil 6 for a certain period of time after the power switch 1a is turned on. Features a power supply circuit. 2. The switch 8b operates in response to the time constant circuit 7 for disconnecting the amplifier circuit 5 and the load 9 for a certain period of time after the power switch 1a is turned on. The power supply circuit described in item 1.