JPS60177686U

JPS60177686U - power converter

Info

Publication number: JPS60177686U
Application number: JP6484784U
Authority: JP
Inventors: 雅之吉田
Original assignee: 三菱電機株式会社
Priority date: 1984-05-02
Filing date: 1984-05-02
Publication date: 1985-11-26

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の構成を適用対象と　　−共
に示したブロック回路図、第２図は同実施例の作用を説
明するためのタイ−ムチヤード、第３図は縦来装置の構
成を適用対象と共に示した回路図である。図におりて、１はコンバータ、１ａ〜１ｆはスイッチン
グ素子としてのダイオード、２は平滑用のコンデンサ、
３はイシバータ、９は電流検出手段としての直流変流器
、２０は故障検出手段とし　、ての故障検出回路である
。なお、各図中同一符号は同一または相当部分を示すも
のとする。Fig. 1 is a block circuit diagram showing the configuration of an embodiment of the present invention together with its application target, Fig. 2 is a time chart for explaining the operation of the embodiment, and Fig. 3 is a vertically operated device. FIG. 2 is a circuit diagram showing the configuration together with an application target. In the figure, 1 is a converter, 1a to 1f are diodes as switching elements, 2 is a smoothing capacitor,
3 is an ishiverter, 9 is a DC transformer as a current detection means, and 20 is a failure detection means, which is a failure detection circuit. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

(1) In a power conversion device in which a smoothing capacitor is connected to the output end of a converter formed by bridge-connecting switching elements, there is provided a current detection means for detecting the current flowing through the capacitor, and an output signal of the current detection means. Based on this, the converter is characterized by comprising failure detection means for generating a failure signal for the converter by detecting that the current flowing through the capacitor does not reach a maximum in a specific period determined by the alternating current supplied to the converter. power conversion equipment.

(2) The failure detection means includes a low-pass filter for removing high-frequency components of the output signal of the current detection means, a wave shaping circuit for shaping the output of the low-pass filter into a rectangular wave, and a waveform shaping circuit for shaping the output of the low-pass filter into a rectangular wave. A monostable multivibrator detects the edge of a rectangular wave and outputs a signal at a constant level for a predetermined period of time, and a flip vibrator outputs a signal corresponding to a failure when the monostable multivibrator does not output a signal at a constant level. 2. The power conversion device according to claim 1, further comprising a flop.