JPH04181U

JPH04181U -

Info

Publication number: JPH04181U
Application number: JP3964990U
Authority: JP
Priority date: 1990-04-13
Filing date: 1990-04-13
Publication date: 1992-01-06

Description

[Brief explanation of the drawing]

第１図はこの考案実施例の回路図、第２図は請
求項２の実施例の斜視図、第３図は請求項３の実
施例の斜視図、第４図は請求項４の実施例の斜視
図である。１……クロツク信号発生器、２，３，４……比
較演算器、５……ジヤンプ信号発生器、６……キ
ヤリア周波数発生器、Ｒ１、Ｒ２、Ｒ３、Ｒ４…
…抵抗、ＲＶ……可変抵抗器、Ｃ……コンデンサ
。 Fig. 1 is a circuit diagram of an embodiment of the invention, Fig. 2 is a perspective view of an embodiment of claim 2, Fig. 3 is a perspective view of an embodiment of claim 3, and Fig. 4 is an embodiment of claim 4. FIG. 1... Clock signal generator, 2, 3, 4... Comparison calculator, 5... Jump signal generator, 6... Carrier frequency generator, R1, R2, R3, R4...
...Resistance, RV...Variable resistor, C...Capacitor.

Claims

[Claims for Utility Model Registration] 1. A rectifier that converts alternating current to direct current, a smoothing circuit, an inverter circuit that converts direct current to alternating current, and a control circuit for the inverter circuit, the control circuit having a sawtooth shape. A clock signal circuit that generates a clock signal, a bias circuit that applies a bias to the clock signal, and a comparison operation between the clock signal combined with the bias and a divided internal reference voltage signal to generate a switching signal for the inverter circuit. A power supply device for a concrete vibrator, comprising: a switching signal generating circuit that generates a switching signal, the bias circuit having a variable resistor, and an input of the bias circuit being a DC input voltage of an inverter circuit. 2. A power supply device for a concrete vibrator, wherein a power supply housing is attached to a frame of a reel of a power connection cable, the power supply device according to claim 1 is housed in the housing, and an output terminal is provided on the outer surface of the housing. 3. A power supply device for a concrete vibrator, wherein the power supply device according to claim 1 is housed in a power supply housing, and a handle or a shoulder belt is attached to the housing. 4. A concrete vibrator with a power supply device, in which the power supply device according to claim 1 is incorporated together with a vibrator drive motor in a base housing of the concrete vibrator.