JPS5937900U

JPS5937900U - Inverter

Info

Publication number: JPS5937900U
Application number: JP13167482U
Authority: JP
Inventors: 雅之森本
Original assignee: 三菱重工業株式会社
Priority date: 1982-08-31
Filing date: 1982-08-31
Publication date: 1984-03-09

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図は従来のインバータの回路構成図、第２図は上記
インバータにおける出力周波数と出力電圧との関係を示
す特性図、第３図は誘導電動機におけるモータ軸出力と
力率との関係を示す特性図、第４図はこの考案の一実施
例に係るインバータの回路構成図、第５図は第４図のイ
ンバータにおける位相差検出回路及び積分回路の回路構
成図である。１１・・・インバータ、１２・・・商用電源、１３・・
・誘導電動機、１４・・・整流回路、１８・・・スイッ
チング回路、２１・・・位相差検出回路１，２２・・・
積分回路、２３・・・比較器、２４・・・可変抵抗器、
２５・・・電圧設定回路。Figure 1 is a circuit diagram of a conventional inverter, Figure 2 is a characteristic diagram showing the relationship between output frequency and output voltage in the above inverter, and Figure 3 is a diagram showing the relationship between motor shaft output and power factor in an induction motor. 4 is a circuit configuration diagram of an inverter according to an embodiment of the invention, and FIG. 5 is a circuit configuration diagram of a phase difference detection circuit and an integration circuit in the inverter of FIG. 4. 11... Inverter, 12... Commercial power supply, 13...
- Induction motor, 14... Rectifier circuit, 18... Switching circuit, 21... Phase difference detection circuit 1, 22...
Integrating circuit, 23... comparator, 24... variable resistor,
25... Voltage setting circuit.

Claims

[Scope of utility model registration request]

An inverter that supplies a driving voltage to an induction motor includes means for detecting a phase difference between a current flowing through the induction motor and a voltage; An inverter comprising means for increasing the output voltage of the inverter.