JPS63271884A - High-frequency heating device - Google Patents
High-frequency heating deviceInfo
- Publication number
- JPS63271884A JPS63271884A JP62106636A JP10663687A JPS63271884A JP S63271884 A JPS63271884 A JP S63271884A JP 62106636 A JP62106636 A JP 62106636A JP 10663687 A JP10663687 A JP 10663687A JP S63271884 A JPS63271884 A JP S63271884A
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- input current
- output
- voltage
- output voltage
- power source
- Prior art date
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Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000007423 decrease Effects 0.000 claims description 8
- 230000010355 oscillation Effects 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 abstract 2
- 230000004913 activation Effects 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は高周波発振器に印加する高圧電源をインバータ
回路で得るように構成した高周波加熱装置に関し、特に
この高圧電源の電力制御方式に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high-frequency heating device configured to obtain a high-voltage power supply applied to a high-frequency oscillator using an inverter circuit, and particularly relates to a power control system for this high-voltage power supply.
従来の技術
商用電源を整流した直流電源をインバータ回路で高圧電
源に変換して高周波発振器に印加するように構成した高
周波加熱装置の電力制御方式には商用電源よシの入力電
流が所定値となるように制御する入力電流制御方式が用
いられている。Conventional technology The power control method of a high-frequency heating device is configured such that a DC power source obtained by rectifying a commercial power source is converted into a high-voltage power source using an inverter circuit and applied to a high-frequency oscillator, and the input current from the commercial power source is set to a predetermined value. An input current control method is used to control the current.
しかし高周波発振器（以下マグネトロンと記す）はそれ
が発振を開始するまではヒータ部のみに電流が流れ、ア
ノード−カソード間には電流が流れないので、前記入力
電流を定常時の値に制御すると、アノード−カソード間
に過大電圧が印加されまたヒータに過大電流が流れてマ
グネトロンの寿命を短くする。However, until the high-frequency oscillator (hereinafter referred to as magnetron) starts oscillating, current flows only through the heater section and no current flows between the anode and cathode, so if the input current is controlled to the steady state value, An excessive voltage is applied between the anode and the cathode, and an excessive current flows through the heater, shortening the life of the magnetron.
従って、最初は前記入力電流を定常時よシ小さく設定し
、前記発振を開始するに十分な時間経過後に前記入力電
流を定常の値に切換える方式を採用して前記問題点を解
決している。Therefore, the above-mentioned problem is solved by adopting a method in which the input current is initially set smaller than in the steady state, and after a sufficient time has elapsed to start the oscillation, the input current is switched to the steady-state value.
発明が解決しようとする問題点
しかし前記発振を開始するに必要な時間は、例えばマグ
ネトロンが冷えている時には４方、温っている時には２
ＳｅＣというように違いが生じるが、前記入力電流制御
方式ではこのような場合、前記入力電流を小さな値に制
御する時間を５ｓｅｃ程度に設定しなければならない。Problems to be Solved by the Invention However, the time required to start the oscillation is, for example, 4 times when the magnetron is cold and 2 times when it is warm.
Although there are differences such as SeC, in such a case, with the input current control method, the time for controlling the input current to a small value must be set to about 5 seconds.
従ってマグネトロンの作動する期間をデユーティ制御し
て見かけ上の高周波出力を制御する高周波加熱装置にお
いては（前記時間差（：５−２＝３ｓｅｃ）Ｘデユーテ
ィ−サイクル数）が無駄時間となる。Therefore, in a high-frequency heating device that controls the apparent high-frequency output by duty-controlling the operating period of the magnetron, the time difference (: 5-2=3 seconds) x the number of duty cycles becomes a wasted time.
また、発振を開始するまでの、入力電流変化に対するア
ノード−カソード間の電圧変化、及び入力電流変化に対
するヒータ電流変化の度合いが、発振時のそれらに比較
して数倍程度大きいので、前記号令等の観点よシ、前記
発振を開始するまでの入力電流設定を余り大きくできな
い。Furthermore, until oscillation starts, the voltage change between the anode and cathode in response to the input current change and the degree of heater current change in response to the input current change are several times larger than those during oscillation. From this point of view, the input current setting until the oscillation starts cannot be set too large.
従ってマグネトロンの冷えている時のヒータ及びカソー
ド温度の立上シ時間を短縮することは非常に困難であり
、前記無駄時間の短縮には自ら限界が生じる。Therefore, it is very difficult to shorten the time required to raise the temperature of the heater and cathode when the magnetron is cold, and there is a limit to the reduction of the dead time.
問題点を解決するだめの手段
本発明による高周波加熱装置では、単方向電源、前記単
方向電源を高圧電源に変換するインバータ回路、及び前
記高圧電源を印加して高周波を発振する高周波発振器を
有し、前記インバータ回路は前記単方向電源の電流を検
出する入力電流検出部、前記高圧電源の電圧を検出する
出力電圧検出部、前記出力電圧検出部の出力電圧を第１
の所定値と比較する出力電圧比較部、前記出力電圧比較
部の出力論理に応じて第２の所定値へ基準信号を漸増さ
せる。または基準信号を漸減させる切換え機能を持つ基
準信号発生部及び前記入力電流検出部の出力が前記基準
信号の追従すべく制御する入力電流制御部とを具備して
いる。Means for Solving the Problems The high-frequency heating device according to the present invention includes a unidirectional power source, an inverter circuit that converts the unidirectional power source into a high-voltage power source, and a high-frequency oscillator that applies the high-voltage power source and oscillates high frequency waves. , the inverter circuit includes an input current detection section that detects the current of the unidirectional power supply, an output voltage detection section that detects the voltage of the high voltage power supply, and a first output voltage detection section that detects the output voltage of the output voltage detection section.
an output voltage comparison section that compares the reference signal with a predetermined value, and gradually increases the reference signal to a second predetermined value according to the output logic of the output voltage comparison section. Alternatively, the apparatus includes a reference signal generating section having a switching function to gradually decrease the reference signal, and an input current controlling section controlling the output of the input current detecting section so that it follows the reference signal.
作用 前記した手段によシ以下のような作用を有する。action The above-mentioned means have the following effects.
マグネトロンが発振を開始するまでの期間は前記したよ
うに小さい入力電流でも出力電圧が所定値に達する。出
力電圧が所定値を超えた場合には入力電流制御部の基準
信号を漸減させるように切換え、出力電圧を抑える。入
力電流に対応して出力電圧が漸減し、所定値よシ下がっ
た場合には基・準信号を漸増するように切換える。この
繰９返しで出力電圧を抑制しているうちにマグネトロン
が発振を開始し、所定の入力電流において゛も出力電圧
が所定値より低くなるので入力電流が所定値まで漸増し
た後安定した状態に制御をする。During the period until the magnetron starts oscillating, the output voltage reaches a predetermined value even with a small input current, as described above. When the output voltage exceeds a predetermined value, the reference signal of the input current control section is switched to gradually decrease to suppress the output voltage. The output voltage gradually decreases in response to the input current, and when it falls below a predetermined value, the reference signal is switched to gradually increase. While the output voltage is being suppressed by repeating this process nine times, the magnetron starts to oscillate, and at a given input current, the output voltage becomes lower than the predetermined value, so the input current gradually increases to the predetermined value, and then the control is stabilized. do.
従ってマグネトロンが冷えている、あるいは温っている
に関係なく、それぞれにおいて最短時間で商用電源よシ
の入力電流が所定値に達する（マグネトロンへの入力電
力が定格値になる）ので従来方式における無駄時間が零
になる。またその過程でのマグネトロンへの過大電圧、
過大電流の印加がないので、その寿命を短縮することも
ない。Therefore, regardless of whether the magnetron is cold or hot, the input current from the commercial power supply reaches the specified value in the shortest possible time (the input power to the magnetron reaches the rated value), so there is no waste in the conventional method. time becomes zero. Also, excessive voltage to the magnetron in the process,
Since there is no application of excessive current, there is no shortening of its life.
実施例
以下、本発明の実施例を添付図面にもとづいて説明する
。Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.
第１図は本発明による高周波加熱装置の高周波発生部の
回路構成図である。FIG. 1 is a circuit diagram of a high frequency generating section of a high frequency heating device according to the present invention.
商用電源１を整流回路２で整流して得られる単方向電源
３をインバータ回路部４で高圧高周波電源６に変換し、
マグネトロン（高周波発振器）６のアノードｅ＆、カソ
ード６ｂに印加してマグネトロン６を動作させる。イン
バータ回路４では単方向電源３をパワートランジスタ７
でスイッチングし、高圧トランス８で外圧をして高圧高
周波電源６を得ている。A unidirectional power source 3 obtained by rectifying a commercial power source 1 with a rectifier circuit 2 is converted into a high voltage high frequency power source 6 with an inverter circuit section 4,
The voltage is applied to the anode e& and cathode 6b of the magnetron (high frequency oscillator) 6 to operate the magnetron 6. In the inverter circuit 4, the unidirectional power supply 3 is connected to the power transistor 7
The high voltage transformer 8 converts the external voltage into a high voltage high frequency power source 6.
入力検出器９は商用電源よシの入力電流Ｉｉｎを検出し
、その出力を入力電流信号整流回路１ｏで整流した信号
と電流基準信号１１との差を電流誤差増幅回路１２で増
幅して、コンパレータ１３に入カスる。コンパレータ１
３はこの入力信号とのこぎシ波発生回路１４よシののこ
ぎシ波とによりパワートランジスタ７のＯＮ１０ Ｆ
Ｆパルス１６を作成する。この入力電流検出器９よシコ
ンパレータ１３までが入力電流制御部１６を構成し、入
力電流Ｉｉｎが減少すると電流誤差増幅回路１２出力が
上昇し、ＯＮ１０ Ｆ Ｆパルス１６のＯＮ時間が長く
なシ入力電流Ｉｉｎを増す方向に動作する。The input detector 9 detects an input current Iin from a commercial power source, and amplifies the difference between a signal obtained by rectifying its output by an input current signal rectifier circuit 1o and a current reference signal 11 by a current error amplification circuit 12, and outputs the signal to a comparator. Enter 13. Comparator 1
3 turns the power transistor 7 ON10F by this input signal and the sawtooth wave generated by the sawtooth wave generation circuit 14.
Create F pulse 16. The input current detector 9 and the comparator 13 constitute the input current control section 16, and when the input current Iin decreases, the output of the current error amplifier circuit 12 increases, and the ON time of the ON10 F F pulse 16 is long. It operates in the direction of increasing the current Iin.
逆に入力電流Ｉｉｎが増加すると入力電流を減らすよう
に動作する。このように入力電流制御部１６は入力電流
Ｋｉｎが所定値になるように制御する。Conversely, when the input current Iin increases, it operates to reduce the input current. In this way, the input current control section 16 controls the input current Kin to a predetermined value.
また、高圧トランス８に設けられた出力電圧検出器１７
よシ得られた出力電圧信号はダイオード１８で半波整流
され、電圧基準信号１９との大小関係を出力電圧比較器
２０で比較し、入力基準信号切換え信号２１を発生する
。出力検出器１７から出力電圧比較器までで出力電圧比
較部２２を構成している。Additionally, an output voltage detector 17 provided in the high voltage transformer 8
The output voltage signal thus obtained is half-wave rectified by a diode 18, and compared in magnitude with a voltage reference signal 19 by an output voltage comparator 20 to generate an input reference signal switching signal 21. The output voltage comparator 22 includes the output detector 17 and the output voltage comparator.
入力基準信号切換え信号２１は入力基準信号切換え用ト
ランジスタ２３に入力され出力電圧比較部２２の出力論
理により入力基準信号が増減する。The input reference signal switching signal 21 is input to the input reference signal switching transistor 23, and the input reference signal increases or decreases depending on the output logic of the output voltage comparator 22.
図よシ明らかのように出力電圧６が大きくなると出力検
出器１７のよりの信号が犬きくな多出力電圧比較部２２
の出力論理はＨとなり、トランジスタ２３がＯＮＩ、、
電流誤差増幅回路１２に入力される電流基準信号１１は
低くなる。このときコンデンサ２４の働きで基準信号１
１は急には変化せず漸減する。電流基準信号１１が小さ
くなるとコンパレータ１３の正入力端子への入力信号が
大きくなシ、０Ｎ１０ＦＦパルス１６のＯＮ期間が短く
なシ入力電流Ｉｉｎを抑制し、出力電圧６も抑制される
。ここでＩｉｎが下がると入力電流検出部９からの信号
が小さくなシ、電流誤差増目路１２の出力が小さくなる
ので負帰還がかかシ入力電流Ｉｉｎは電流基準信号１１
の値によシ制御される。As is clear from the figure, when the output voltage 6 increases, the signal from the output detector 17 becomes sharper.
The output logic becomes H, and the transistor 23 becomes ONI.
The current reference signal 11 input to the current error amplification circuit 12 becomes low. At this time, due to the function of the capacitor 24, the reference signal 1
1 does not change suddenly but gradually decreases. When the current reference signal 11 becomes smaller, the input signal to the positive input terminal of the comparator 13 becomes larger, the ON period of the 0N10FF pulse 16 becomes shorter, the input current Iin is suppressed, and the output voltage 6 is also suppressed. Here, when Iin decreases, the signal from the input current detection section 9 becomes small, and the output of the current error increasing path 12 becomes small, so negative feedback is applied.The input current Iin becomes the current reference signal 11.
is controlled by the value of
電流基準信号１１が十分小さくなると出力電圧６も小さ
くなるので出力電圧検出部１７の信号も下が多出力電圧
比較部２２の出力論理はＬとなり、トランジスタ２３が
ＯＦＦとなシ、電流基準信号１１はコンデンサ２４の働
きによシ漸増する。上記のように出力電圧比較部２２と
電流基準信号を切換える機能を有する電流基準信号発生
部２６で出力電圧６の上限を制限するリミッタの働きを
している。When the current reference signal 11 becomes sufficiently small, the output voltage 6 also becomes small, so that the signal of the output voltage detection section 17 is also low, and the output logic of the multi-output voltage comparison section 22 becomes L, and the transistor 23 is turned off. gradually increases due to the action of the capacitor 24. As described above, the output voltage comparison section 22 and the current reference signal generation section 26 having the function of switching the current reference signal function as a limiter that limits the upper limit of the output voltage 6.
第２図はマグネトロン７が発振している時と、していな
い時の高圧電源６電圧波形であシ、両者の違いは明らか
である。このマイナス方向の電圧がマグネトロン７を発
振させる順方向電圧であシ、それをＶ、工と定義して、
入力電流工ｉｎとの関係を求めると第３図のような動作
原理図になる。Figure 2 shows the voltage waveforms of the high-voltage power supply 6 when the magnetron 7 is oscillating and when it is not, and the difference between the two is obvious. This negative voltage is the forward voltage that causes the magnetron 7 to oscillate, and it is defined as V,
When the relationship with the input current factor in is determined, the operating principle diagram as shown in FIG. 3 is obtained.
第３図に於て、ＶはマグネトロンＴの許容印加電圧、工
はマグネトロン７の定格出力時の商用電源１よシの入力
電流Ｉｉｎであり、マグネトロン７が発振していない時
のＩｉｎはＩよシ小さく、また発振している時のｖｌは
Ｖよシ小さい。In Fig. 3, V is the allowable applied voltage of the magnetron T, and is the input current Iin of the commercial power supply 1 when the magnetron 7 is at its rated output, and when the magnetron 7 is not oscillating, Iin is the same as I. Vl is small, and vl during oscillation is smaller than V.
従って第１図において入力電流Ｉｉｎを入力電流検出器
９が恢出し、また高圧電源θを出力電圧検出器１７で検
出し、ダイオード１８でＶム！に相当する電圧信号を得
るように整流方向を設定し、トランジスタ２３がＯＦＦ
の時の電流基準信号１１をＩに相当する値に設定し、電
圧基準信号１９をＶに相当する値に設定すると前述した
動作原理によシマグネトロン６が発振を開始するまでは
出力電圧検出部２２と電流基準信号発生部２６に出力電
圧６の値を７前後に制御する。マグネトロン６が発振を
開始すると出力電圧検出器１７の信号が小さくなシ、入
力電流が工となるように入力電流制御部１ｅが働く。Therefore, in FIG. 1, input current Iin is detected by input current detector 9, high voltage power supply θ is detected by output voltage detector 17, and diode 18 detects Vm! The rectification direction is set to obtain a voltage signal corresponding to
When the current reference signal 11 is set to a value corresponding to I and the voltage reference signal 19 is set to a value corresponding to V, the output voltage detecting section remains unchanged until the sima magnetron 6 starts oscillating according to the operating principle described above. 22 and the current reference signal generator 26 to control the value of the output voltage 6 to around 7. When the magnetron 6 starts oscillating, the input current control section 1e operates so that the signal from the output voltage detector 17 becomes small and the input current becomes low.
第１図に於て、入力電流の検出にトランスを用い、出力
電圧の検出に専用巻線を設けているが、前者は抵抗を系
に挿入してその電圧降下で電流を検出、後者は高圧トラ
ンスの二次側巻線に検出端子を設けて電圧を検出する方
法等の変更が可能であり、また入力電流制御部１６．出
力電圧制御部２１も図示した回路構成に限定されるもの
ではない。In Figure 1, a transformer is used to detect the input current, and a dedicated winding is installed to detect the output voltage. It is possible to change the method of detecting the voltage by providing a detection terminal on the secondary winding of the transformer, and the input current control section 16. The output voltage control section 21 is also not limited to the illustrated circuit configuration.
また高圧トランス５とマグネトロン７との間に倍電圧整
流回路を設けた場合にも同様の方式で対応可能である。Furthermore, a similar method can be applied to the case where a voltage doubler rectifier circuit is provided between the high voltage transformer 5 and the magnetron 7.
発明の効果
以上のように本発明の高周波加熱装置によれば次の効果
が得られる。Effects of the Invention As described above, the high frequency heating device of the present invention provides the following effects.
（１）マグネトロンが冷えている。あるいは温っている
に関係なく、マグネトロンが発振を開始すると自動的に
定格出力を得るように入力電流Ｉｉｎが変化するので従
来方式で問題となっている無駄時間が全く生じない。(1) The magnetron is cold. Or, regardless of whether the magnetron is hot or not, when the magnetron starts oscillating, the input current Iin changes to automatically obtain the rated output, so there is no wasted time that is a problem in the conventional system.
ｅ）マグネトロンへの過大電流印加日、過大電流印加が
無いので、そのガ命を低下させることがない。e) Since there is no excessive current applied to the magnetron, its life will not be reduced.
第１図は本発明による高周波加熱装置の高圧電源発生部
の回路博成図、第２図は高圧電源の成形図、第３図は同
動作原理図、第４図は同起動特性図である。
３・・・・・・単方同電源、４・・・・・・インバータ
回路、６・・・・・・高圧電源、６・・・・・・高周波
発振器、９・・・・・・入力電流構出部、１１・・・・
・・入力電流基準信号、１６・・・・・・入力電流制御
部、１７・・・・・・出力電圧検出部、２２・・・・・
・出力電圧比較部、２６・・・・・・基準信号発生部。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名ｗＥ
２図
第３図Fig. 1 is a circuit diagram of the high-voltage power generation part of the high-frequency heating device according to the present invention, Fig. 2 is a molding diagram of the high-voltage power supply, Fig. 3 is a diagram of the principle of operation, and Fig. 4 is a diagram of the starting characteristics. . 3... Single power supply, 4... Inverter circuit, 6... High voltage power supply, 6... High frequency oscillator, 9... Input Current output section, 11...
...Input current reference signal, 16...Input current control section, 17...Output voltage detection section, 22...
- Output voltage comparison section, 26...Reference signal generation section. Name of agent: Patent attorney Toshio Nakao and one other person wE
Figure 2 Figure 3
Claims (1)
バータ回路、及び前記高圧電源を印加して高周波を発振
する高周波発振器を有し、前記インバータ回路は前記単
方向電源の電流を検出する入力電流検出部、前記高圧電
源の電圧を検出する出力電圧検出部、前記出力電圧検出
部の出力電圧を第１の所定値と比較する出力電圧比較部
、前記出力電圧比較部の出力論理に応じて第２の所定値
へ基準信号を漸増させるまたは基準信号を漸減させる切
換え機能を持つ基準信号発生部、及び前記入力電流検出
部の出力が前記基準信号に追従すべく制御する入力電流
制御部とを具備して成る高周波加熱装置。It has a unidirectional power source, an inverter circuit that converts the unidirectional power source into a high voltage power source, and a high frequency oscillator that applies the high voltage power source and oscillates a high frequency, and the inverter circuit has an input current that detects the current of the unidirectional power source. a detection section, an output voltage detection section that detects the voltage of the high-voltage power supply, an output voltage comparison section that compares the output voltage of the output voltage detection section with a first predetermined value, and an output voltage detection section that detects the voltage of the high voltage power supply; 2; a reference signal generator having a switching function to gradually increase or decrease the reference signal to a predetermined value; and an input current controller to control the output of the input current detector to follow the reference signal. A high-frequency heating device made of
Priority Applications (19)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62106636A JP2537859B2 (en) | 1987-04-30 | 1987-04-30 | High frequency heating equipment |
| KR1019880004720A KR910001986B1 (en) | 1987-04-30 | 1988-04-25 | Magnetron feeding apparatus |
| EP88106792A EP0289013B1 (en) | 1987-04-30 | 1988-04-28 | A power supply for a magnetron |
| AU15281/88A AU592262B2 (en) | 1987-04-30 | 1988-04-28 | Magnetron feeding apparatus and method of controlling the same |
| AU15277/88A AU592934B2 (en) | 1987-04-30 | 1988-04-28 | A power supply for a magnetron |
| DE88106792T DE3884258T2 (en) | 1987-04-30 | 1988-04-28 | Power supply for magnetron. |
| ZA883028A ZA883028B (en) | 1987-04-30 | 1988-04-28 | Magnetron feeding apparatus and method of controlling the same |
| CA000565408A CA1301257C (en) | 1987-04-30 | 1988-04-28 | Power supply for a magnetron |
| CN88102529A CN1021188C (en) | 1987-04-30 | 1988-04-29 | Power supply for magnetron |
| KR1019880004916A KR910001987B1 (en) | 1987-04-30 | 1988-04-29 | Magnetron feeding apparatus and control method |
| DE3855740T DE3855740T2 (en) | 1987-04-30 | 1988-04-29 | Magnetron supply device and control method |
| ZA883065A ZA883065B (en) | 1987-04-30 | 1988-04-29 | A power supply for a magnetron |
| CA000565565A CA1302513C (en) | 1987-04-30 | 1988-04-29 | Magnetron feeding apparatus and method of controlling the same |
| EP88106860A EP0289032B1 (en) | 1987-04-30 | 1988-04-29 | Magnetron feeding apparatus and method of controlling the same |
| CN198888102449A CN88102449A (en) | 1987-04-30 | 1988-04-30 | Magnetron operating apparatus and control method thereof |
| US07/189,170 US4886951A (en) | 1987-04-30 | 1988-05-02 | Power supply for a magnetron having a rectifying circuit, switching circuit, and transformer |
| BR8802122A BR8802122A (en) | 1987-04-30 | 1988-05-02 | POWER SUPPLY FOR A MAGNETRON |
| US07/189,166 US4900989A (en) | 1987-04-30 | 1988-05-02 | Magnetron feeding apparatus and method of controlling the same |
| BR8802124A BR8802124A (en) | 1987-04-30 | 1988-05-02 | MAGNETRON FEEDER AND PROCESS FOR YOUR CONTROL |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62106636A JP2537859B2 (en) | 1987-04-30 | 1987-04-30 | High frequency heating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63271884A true JPS63271884A (en) | 1988-11-09 |
| JP2537859B2 JP2537859B2 (en) | 1996-09-25 |
Family
ID=14438602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62106636A Expired - Fee Related JP2537859B2 (en) | 1987-04-30 | 1987-04-30 | High frequency heating equipment |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2537859B2 (en) |
| ZA (2) | ZA883028B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03269992A (en) * | 1990-03-16 | 1991-12-02 | Sanyo Electric Co Ltd | Electronic oven |
| KR100586510B1 (en) * | 2000-12-06 | 2006-06-07 | 삼성전자주식회사 | Microwave oven And Control Method thereof |
-
1987
- 1987-04-30 JP JP62106636A patent/JP2537859B2/en not_active Expired - Fee Related
-
1988
- 1988-04-28 ZA ZA883028A patent/ZA883028B/en unknown
- 1988-04-29 ZA ZA883065A patent/ZA883065B/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03269992A (en) * | 1990-03-16 | 1991-12-02 | Sanyo Electric Co Ltd | Electronic oven |
| KR100586510B1 (en) * | 2000-12-06 | 2006-06-07 | 삼성전자주식회사 | Microwave oven And Control Method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA883065B (en) | 1989-01-25 |
| ZA883028B (en) | 1989-03-29 |
| JP2537859B2 (en) | 1996-09-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |