JPS60170994U

JPS60170994U - induction heating cooker

Info

Publication number: JPS60170994U
Application number: JP5873784U
Authority: JP
Inventors: 深沢　実
Original assignee: 三洋電機株式会社
Priority date: 1984-04-20
Filing date: 1984-04-20
Publication date: 1985-11-13
Also published as: JPS6325676Y2

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 drawings]

第１図は本考案に用いられるインバータ回路の回路図、
第２図ＡはＯＮ、ＯＦＦ信号を示す波形図、同図Ｂはス
イッチング素子に流れる電流を系す波形図、同図Ｃはス
イッチング素子端子電圧を示す波形図、第３図は本考案
誘導加熱装置の制御回路のブロック図、第４図はＯＮ期
間設定手段や構成を示すブロック図である。１・・・全波整流回路、２・・・チョークコイル、３・
・・フィルタコンデンサ、４・・・誘導加熱コイル、５
・・・共振コンデンサ、６・・・スイッチング素子、７
・・・ダンパーダイオード、８・・・駆動回路、１１・
・・カレントトランス、１２・・・調理具、１３・・・
Ａ／Ｄ変換回路、１４・・・タイミング生成回路、１５
−・・・不適正負荷検知回路、１６・・・パワー設定回
路、１７・・・ＳＵＢ回路、１８・・−ＯＮ期間設定手
段、２３・・・加算回路、２４・・・保持回路、２５・
・・ソフトスタート設　−足回路、２６・・・選択回路
。Figure 1 is a circuit diagram of an inverter circuit used in the present invention.
Figure 2 A is a waveform diagram showing the ON and OFF signals, Figure B is a waveform diagram showing the current flowing through the switching element, Figure C is a waveform diagram showing the switching element terminal voltage, and Figure 3 is the induction heating according to the present invention. FIG. 4 is a block diagram of the control circuit of the device, showing the ON period setting means and configuration. 1...Full wave rectifier circuit, 2...Choke coil, 3...
...Filter capacitor, 4...Induction heating coil, 5
... Resonance capacitor, 6... Switching element, 7
... Damper diode, 8... Drive circuit, 11.
...Current transformer, 12...Cooking utensils, 13...
A/D conversion circuit, 14...timing generation circuit, 15
- Improper load detection circuit, 16... Power setting circuit, 17... SUB circuit, 18... -ON period setting means, 23... Adding circuit, 24... Holding circuit, 25...
... Soft start setting - foot circuit, 26... selection circuit.

Claims

[Scope of utility model registration request]

A DC power supply made by full-wave rectification of AC power supply voltage, an induction heating coil coupled to this DC power supply, a resonant capacitor forming a resonant circuit together with the induction heating coil, and a resonant capacitor connected to the resonant circuit and connected to this resonant circuit. An induction heating device comprising a switching element for generating a resonant current and a diode connected in antiparallel to the switching element, and generating an oscillating current in the resonant circuit by controlling ON and OFF of the switching element. , an input current detection means for detecting the AC input current, and a current value 4 detected by the input current detection means mb
An A/=C conversion circuit that converts into digital data PAD, a power setting circuit that sets power setting data Pref according to the input power with a digital value of mbit, and the difference between these data PAD (!: Pref) 5UES that takes
It consists of an Iffl path and an OM period setting means for setting and holding ON period data Pcon corresponding to the time when the switching element is to be turned on as digital data of n bit larger than the above mbit, and this ON period setting means is obtained from the SUB circuit. An induction heating device characterized in that the ON period data Pcon is changed by the difference data Pref P AD to newly set the ON period data Pcon.