JP2001313159A - Control method of inverter equipment - Google Patents
Control method of inverter equipmentInfo
- Publication number
- JP2001313159A JP2001313159A JP2000127343A JP2000127343A JP2001313159A JP 2001313159 A JP2001313159 A JP 2001313159A JP 2000127343 A JP2000127343 A JP 2000127343A JP 2000127343 A JP2000127343 A JP 2000127343A JP 2001313159 A JP2001313159 A JP 2001313159A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- inverter
- power
- load circuit
- frequency power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、複数組の共振負
荷回路それぞれに対して個別に高周波電力を供給する該
複数組のインバータ装置を同一筐体内に配置してなるイ
ンバータ設備に関し、特に、それぞれのインバータ装置
が出力する周波数を所定の範囲内で運転するためのイン
バータ設備の制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter equipment in which a plurality of sets of inverter devices for individually supplying high-frequency power to a plurality of sets of resonance load circuits are arranged in the same housing. The present invention relates to a method for controlling inverter equipment for operating the frequency output by the inverter device within a predetermined range.
【０００２】[0002]
【従来の技術】図８はこの種のインバータ設備として、
同一筐体内にインバータ装置が２組配置され、それぞれ
のインバータ装置が電磁調理器の高周波電源に供される
ときの従来例を示す回路構成図であり、１は商用電源な
どの単相の交流電源、２は交流電源１から給電されるイ
ンバータ設備、３，４はインバータ設備３でそれぞれ誘
導加熱される鍋を示す。2. Description of the Related Art FIG. 8 shows this type of inverter equipment.
FIG. 2 is a circuit configuration diagram showing a conventional example in which two sets of inverter devices are provided in the same housing and each of the inverter devices is supplied to a high-frequency power supply of an electromagnetic cooker, and 1 is a single-phase AC power supply such as a commercial power supply. Reference numeral 2 denotes an inverter equipment supplied with power from the AC power supply 1, and reference numerals 3 and 4 denote pots which are respectively induction-heated by the inverter equipment 3.
【０００３】このインバータ設備２にはノイズフィルタ
２１と、一方のインバータ装置としての整流回路２２，
フィルタコンデンサ２３，ＩＧＢＴとダイオードの逆並
列回路を上下アームとしたインバータ主回路２４，加熱
コイル２５，共振コンデンサ２６及び２７と、他方のイ
ンバータ装置としての整流回路３１，フィルタコンデン
サ３２，ＩＧＢＴとダイオードの逆並列回路を上下アー
ムとしたインバータ主回路３３，加熱コイル３４，共振
コンデンサ３５及び３６とを備えている。The inverter equipment 2 includes a noise filter 21 and a rectifier circuit 22 as one of the inverter devices.
A filter capacitor 23, an inverter main circuit 24 having an antiparallel circuit of an IGBT and a diode as an upper and lower arm, a heating coil 25, resonance capacitors 26 and 27, and a rectifier circuit 31, a filter capacitor 32, and a IGBT and a diode as the other inverter device. An inverter main circuit 33 having an anti-parallel circuit as an upper and lower arm, a heating coil 34, and resonance capacitors 35 and 36 are provided.
【０００４】図８の回路構成において、フィルタコンデ
ンサ２３，３２それぞれは整流回路２２，３２それぞれ
の高周波インピーダンスを下げる目的で備えており、こ
のコンデンサに代えてＬＣフィルタを備える場合もあ
る。In the circuit configuration shown in FIG. 8, each of the filter capacitors 23 and 32 is provided for the purpose of lowering the high-frequency impedance of each of the rectifier circuits 22 and 32, and an LC filter may be provided instead of this capacitor.
【０００５】図８に示したインバータ設備の従来の制御
方法を、図９に示す特性図を参照しつつ、以下に説明す
る。A conventional control method of the inverter equipment shown in FIG. 8 will be described below with reference to a characteristic diagram shown in FIG.
【０００６】図９は加熱コイル（参照符号２５又は３
４）と共振コンデンサ（参照符号２６，２７又は３５，
３６）と鍋（参照符号３又は４）とからなる共振負荷回
路に供給される高周波電力の周波数と該負荷回路に注入
される有効電力との関係を示す特性図であり、例えば紙
面右側の特性を鍋３側とし、紙面左側の特性を鍋４側と
すると、それぞれの特性におけるピークの周波数はそれ
ぞれの共振負荷回路の共振周波数であり、それぞれのイ
ンバータ装置から出力する周波数が前記共振周波数より
高い周波数では該インバータ装置から見た共振負荷回路
側の力率が遅れ領域であり、また、低い周波数では該イ
ンバータ装置から見た共振負荷回路側の力率が進み領域
である。FIG. 9 shows a heating coil (reference numeral 25 or 3).
4) and a resonance capacitor (reference numeral 26, 27 or 35,
36) is a characteristic diagram showing the relationship between the frequency of the high-frequency power supplied to the resonant load circuit composed of the pan (36) and the pot (reference numeral 3 or 4) and the active power injected into the load circuit. Is the pan 3 side, and the characteristic on the left side of the drawing is the pan 4 side, the peak frequency in each characteristic is the resonance frequency of each resonance load circuit, and the frequency output from each inverter device is higher than the resonance frequency. At a frequency, the power factor on the resonance load circuit side as viewed from the inverter device is a delay region, and at a low frequency, a power factor on the resonance load circuit side as viewed from the inverter device is a lead region.
【０００７】すなわち、従来の制御方法では前記遅れ領
域でそれぞれのインバータ装置が出力する周波数を変化
させることにより、前記共振負荷回路に注入する有効電
力、すなわち、鍋３又は鍋４への加熱電力を調整してい
た。That is, in the conventional control method, the active power to be injected into the resonance load circuit, that is, the heating power to the pot 3 or the pot 4, is changed by changing the frequency output by each inverter device in the delay region. I was adjusting.
【０００８】[0008]
【発明が解決しようとする課題】上述の従来のインバー
タ設備の制御方法によると、図９に示す◇印の点または
印の点の周波数の高周波電力で鍋３又は鍋４への加熱電
力が定格値に達するが、このときの周波数の差、また
は、それぞれの鍋を加熱中にそれぞれのインバータ装置
が出力する周波数の差により電磁音が発生し、特に、こ
の差が数ｋＨｚのときの電磁音が周りの人達に不快感を
与えることがあった。According to the above-described conventional method of controlling the inverter equipment, the heating power to the pot 3 or the pot 4 is rated by the high-frequency power of the frequency indicated by the triangle mark or the frequency indicated by the mark shown in FIG. The electromagnetic noise is generated due to the frequency difference at this time or the difference in the frequency output by each inverter device while each pot is being heated. In particular, when this difference is several kHz, Sometimes gave discomfort to the people around me.
【０００９】この不快感をより少なくするための第１の
方策として、それぞれのインバータ装置を別々の筐体に
配置し、これらをできるだけ離して設置することである
が、その結果、設置スペースの増大を招き、調理作業に
支障を来し、特に、料理店などの厨房用の電磁調理器に
供されることには問題がある。As a first measure for reducing the discomfort, it is necessary to arrange the inverter devices in separate housings and install them as far apart as possible. As a result, the installation space is increased. , Which hinders the cooking operation. In particular, there is a problem in using it for an electromagnetic cooker for a kitchen such as a restaurant.
【００１０】また、前記不快感をより少なくするための
第２の方策として、加熱中にそれぞれのインバータ装置
が出力する周波数の差を１ｋＨｚ以下にすることである
が、共振負荷回路側の力率を遅れ領域のみで運転する従
来の制御方法では、それぞれのインバータ装置が出力す
る周波数の差を１ｋＨｚ以下にすると、鍋の種類によっ
ては所望の加熱電力が得られなくなり、その結果、調理
時間が著しく長くなるなど調理効率を阻害する要因とな
ることがあった。As a second measure for reducing the discomfort, the difference between the frequencies output by the respective inverter devices during heating is set to 1 kHz or less. In the conventional control method in which the inverters are operated only in the delay region, if the difference between the frequencies output by the respective inverter devices is set to 1 kHz or less, desired heating power cannot be obtained depending on the type of the pan, and as a result, the cooking time is significantly increased. In some cases, it became a factor that hindered the cooking efficiency, such as lengthening.
【００１１】この発明の目的は、上記問題点を解消する
インバータ設備の制御方法を提供することにある。An object of the present invention is to provide a method for controlling inverter equipment which solves the above problems.
【００１２】[0012]
【課題を解決するための手段】この第１の発明は、複数
組の共振負荷回路それぞれに対して個別に高周波電力を
供給する該複数組のインバータ装置を同一筐体内に配置
してなるインバータ設備において、前記共振負荷回路側
の力率が進み及び遅れの双方の領域に渡った周波数の高
周波電力を前記インバータ装置それぞれが前記負荷回路
に供給することにより、前記インバータ装置が出力する
所望の高周波電力の周波数それぞれを所定の範囲内にし
たことを特徴とする制御方法を行う。According to a first aspect of the present invention, there is provided an inverter equipment comprising a plurality of sets of inverter devices for individually supplying high-frequency power to a plurality of sets of resonance load circuits in a same housing. The desired high-frequency power output from the inverter device is supplied by the inverter devices each supplying high-frequency power having a frequency in which the power factor on the resonance load circuit side covers both the leading and lagging regions to the load circuit. Is performed within a predetermined range.
【００１３】第２の発明は前記第１の発明のインバータ
設備の制御方法において、前記共振負荷回路を形成する
それぞれの鍋を誘導加熱することを特徴とする。According to a second aspect of the present invention, in the control method of the inverter equipment according to the first aspect, each pot forming the resonance load circuit is induction-heated.
【００１４】第３の発明は前記第１又は第２の発明のイ
ンバータ設備の制御方法において、前記それぞれのイン
バータ装置が起動時に、所定の周波数の高周波電力での
前記共振負荷回路側の力率が進み領域か遅れ領域かを判
定するために、前記インバータ装置それぞれが前記所定
周波数の高周波電力を該インバータ装置のＰＷＭ制御に
より徐々に増大させつつ前記共振負荷回路に供給し、該
負荷回路に注入される有効電力の検出値が所定の値に達
したときの高周波電力に対して、その周波数のみを若干
高くした高周波電力を前記負荷回路に供給し、この高く
した周波数の高周波電力による前記検出値の変化を監視
し、前記検出値が増大したときには前記インバータ装置
が前記進み領域で運転していると判定し、また、該検出
値が減少したときには前記遅れ領域で運転していると判
定することを特徴とする。According to a third invention, in the control method of the inverter equipment according to the first or second invention, when the respective inverter devices are started, the power factor on the resonance load circuit side at high frequency power of a predetermined frequency is reduced. Each of the inverter devices supplies the high frequency power of the predetermined frequency to the resonance load circuit while gradually increasing the high frequency power by the PWM control of the inverter device in order to determine whether the region is a lead region or a delay region. The high-frequency power when the detected value of the active power reaches a predetermined value is supplied to the load circuit with the high-frequency power slightly higher in frequency than the high-frequency power. Monitoring the change, when the detected value increases, it is determined that the inverter device is operating in the advance region, and when the detected value decreases. And judging The running at the late region.
【００１５】第４の発明は前記第１又は第２の発明のイ
ンバータ設備の制御方法において、前記それぞれのイン
バータ装置が起動時に、所定の周波数の高周波電力での
前記共振負荷回路側の力率が進み領域か遅れ領域かを判
定するために、前記インバータ装置それぞれが前記所定
周波数の高周波電力を該インバータ装置のＰＷＭ制御に
より徐々に増大させつつ前記共振負荷回路に供給し、該
負荷回路に注入される有効電力の検出値が所定の値に達
したときの高周波電力に対して、その周波数のみを若干
低くした高周波電力を前記負荷回路に供給し、この低く
した周波数の高周波電力による前記検出値の変化を監視
し、前記検出値が増大したときには前記インバータ装置
が前記遅れ領域で運転していると判定し、また、該検出
値が減少したときには前記進み領域で運転していると判
定することを特徴とする。According to a fourth invention, in the control method of the inverter equipment according to the first or second invention, when the respective inverter devices are started, the power factor of the resonance load circuit at a high frequency power of a predetermined frequency is reduced. Each of the inverter devices supplies the high frequency power of the predetermined frequency to the resonance load circuit while gradually increasing the high frequency power by the PWM control of the inverter device in order to determine whether the region is a lead region or a delay region. The high-frequency power when the detected value of the active power reaches a predetermined value is supplied to the load circuit with a high-frequency power slightly lower than the high-frequency power. Monitoring the change, when the detected value increases, it is determined that the inverter device is operating in the delay region, and when the detected value decreases. And judging The running at the processing proceeds area.
【００１６】第５の発明は前記第１又は第２の発明のイ
ンバータ設備の制御方法において、前記それぞれのイン
バータ装置が起動時に、所定の周波数の高周波電力での
前記共振負荷回路側の力率が進み領域か遅れ領域かを判
定するために、前記インバータ装置それぞれが前記所定
周波数の高周波電力を該インバータ装置の時比率λの値
を徐々に増大させつつ前記共振負荷回路に供給し、該時
比率λが所定の値に達したときの高周波電力に対して、
その周波数のみを若干高くした高周波電力を前記負荷回
路に供給し、この高くした周波数の高周波電力により前
記共振負荷回路に注入される有効電力の検出値の変化を
監視し、前記検出値が増大したときには前記インバータ
装置が前記進み領域で運転していると判定し、また、該
検出値が減少したときには前記遅れ領域で運転している
と判定することを特徴とする。According to a fifth aspect of the present invention, in the control method of the inverter equipment according to the first or second aspect, when the respective inverter devices are activated, the power factor of the resonance load circuit side at high frequency power of a predetermined frequency is reduced. Each of the inverter devices supplies the high-frequency power of the predetermined frequency to the resonance load circuit while gradually increasing the value of the duty ratio λ of the inverter device to determine whether the duty ratio is in the lead region or the delay region; For high frequency power when λ reaches a predetermined value,
The high-frequency power whose only frequency is slightly increased is supplied to the load circuit, and the change in the detection value of the active power injected into the resonance load circuit by the high-frequency power of the increased frequency is monitored, and the detection value increases. Sometimes, it is determined that the inverter device is operating in the advance region, and when the detected value decreases, it is determined that the inverter device is operating in the delay region.
【００１７】第６の発明は前記第１又は第２の発明のイ
ンバータ設備の制御方法において、前記それぞれのイン
バータ装置が起動時に、所定の周波数の高周波電力での
前記共振負荷回路側の力率が進み領域か遅れ領域かを判
定するために、前記インバータ装置それぞれが前記所定
周波数の高周波電力を該インバータ装置の時比率λの値
を徐々に増大させつつ前記共振負荷回路に供給し、該時
比率λが所定の値に達したときの高周波電力に対して、
その周波数のみを若干低くした高周波電力を前記負荷回
路に供給し、この低くした周波数の高周波電力により前
記共振負荷回路に注入される有効電力の検出値の変化を
監視し、前記検出値が増大したときには前記インバータ
装置が前記遅れ領域で運転していると判定し、また、該
検出値が減少したときには前記進み領域で運転している
と判定することを特徴とする。According to a sixth aspect of the present invention, in the control method of the inverter equipment according to the first or second aspect, the power factor on the resonance load circuit side at a high frequency power of a predetermined frequency when the respective inverter devices are started up. Each of the inverter devices supplies the high-frequency power of the predetermined frequency to the resonance load circuit while gradually increasing the value of the duty ratio λ of the inverter device to determine whether the duty ratio is in the lead region or the delay region; For high frequency power when λ reaches a predetermined value,
The high-frequency power whose only frequency is slightly lowered is supplied to the load circuit, and the change in the detection value of the active power injected into the resonance load circuit by the high-frequency power of the reduced frequency is monitored, and the detection value increases. Sometimes, it is determined that the inverter device is operating in the delay region, and when the detected value decreases, it is determined that the inverter device is operating in the advance region.
【００１８】第７の発明は前記第３〜第６の発明のイン
バータ設備の制御方法において、前記所定周波数より若
干変化させた周波数の高周波電力で前記共振負荷回路側
の力率が進み領域か遅れ領域かを判定した後、前記それ
ぞれのインバータ装置は前記所定周波数で通常運転に入
ることを特徴とする。According to a seventh aspect of the present invention, in the control method of the inverter equipment according to the third to sixth aspects, the power factor on the resonance load circuit side is advanced or delayed with high frequency power having a frequency slightly changed from the predetermined frequency. Each of the inverter devices enters a normal operation at the predetermined frequency after judging that the inverter is in the region.
【００１９】第８の発明は前記第３〜第６の発明のイン
バータ設備の制御方法において、前記所定周波数より若
干変化させた周波数の高周波電力で前記共振負荷回路側
の力率が進み領域か遅れ領域かを判定した後、前記それ
ぞれのインバータ装置は前記変化させた周波数で通常運
転に入ることを特徴とする。According to an eighth aspect of the present invention, in the control method of the inverter equipment according to the third to sixth aspects, the power factor on the resonance load circuit side is advanced or delayed with high frequency power having a frequency slightly changed from the predetermined frequency. After the determination of the region, the respective inverter devices enter a normal operation at the changed frequency.
【００２０】第９の発明は前記第７又は第８の発明のイ
ンバータ設備の制御方法において、前記それぞれのイン
バータ装置が前記周波数で通常運転中に、前記共振負荷
回路それぞれに注入される有効電力の検出値を監視し、
前記検出値がそれぞれの有効電力指令値に対して過不足
状態になったときに、前記インバータ装置はＰＷＭ制御
からＰＦＭ制御に切り替え、前記判定結果に基づいて、
切り替えた後の前記インバータ装置が出力する周波数の
増減を行うことにより前記過不足状態を解消することを
特徴とする。According to a ninth aspect of the present invention, in the control method of the inverter equipment according to the seventh or eighth aspect, the active power injected into each of the resonance load circuits during the normal operation of each of the inverter devices at the frequency. Monitor the detected value,
When the detected values are in excess or deficiency with respect to the respective active power command values, the inverter switches from PWM control to PFM control, and based on the determination result,
The excess / deficiency state is eliminated by increasing or decreasing the frequency output by the inverter device after switching.
【００２１】この発明は下記に着目してなされたもので
ある。The present invention has been made by paying attention to the following.
【００２２】すなわち、インバータ装置から見た共振負
荷回路側の力率が進み領域でインバータ装置を運転する
ときには、周知の如く、このインバータ装置の主回路を
構成する自己消弧形素子と逆並列に接続されるダイオー
ドに比較的大きな逆回復電流が流れるが、この逆回復電
流を許容するインバータ装置にすることにより、前記負
荷回路側の力率が進み及び遅れの双方の領域に渡った周
波数の高周波電力を該インバータ装置それぞれが前記負
荷回路に供給することが可能となり、従って、インバー
タ装置が出力する所望の高周波電力の周波数それぞれを
所定の範囲内にすることができ、その結果、先述の電磁
音を抑制することができる。That is, when the inverter is operated in a region where the power factor on the resonance load circuit side as viewed from the inverter is advanced, as is well known, the self-extinguishing element constituting the main circuit of the inverter is connected in anti-parallel. A relatively large reverse recovery current flows through the connected diode, but by using an inverter device that allows the reverse recovery current, the power factor on the load circuit side can be increased to a high frequency with a frequency in both the leading and lagging regions. It becomes possible for each of the inverter devices to supply power to the load circuit, so that each of the frequencies of the desired high-frequency power output from the inverter device can be set within a predetermined range. Can be suppressed.
【００２３】[0023]
【発明の実施の形態】図１はこの発明の実施の形態を示
し、同一筐体内にインバータ装置が２組配置され、それ
ぞれのインバータ装置が電磁調理器の高周波電源に供さ
れるときの回路構成図であり、図８に示した従来例回路
と同一機能を有するものには同一符号を付している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, in which two sets of inverter devices are arranged in the same housing, and each of the inverter devices is supplied to a high-frequency power source of an electromagnetic cooker. FIG. 9 is a diagram in which components having the same functions as those of the conventional circuit shown in FIG.
【００２４】すなわち、図１に示したインバータ設備５
の回路構成が図８に示した回路構成と異なる点はインバ
ータ主回路２４，３３に代えて、インバータ主回路５
１，５２を備えていることである。That is, the inverter equipment 5 shown in FIG.
Is different from the circuit configuration shown in FIG. 8 in that the inverter main circuits 24 and 33 are replaced with the inverter main circuit 5.
1 and 52.
【００２５】このインバータ主回路５１，５２を構成す
るＩＧＢＴと逆並列接続のダイオードには、上述の逆回
復電流が許容できる定格を有するダイオード、該逆回復
電流をより少なくできるファーストリカバリダイオード
などを選定し、その結果、インバータ主回路５１，５２
から加熱コイル（参照符号２５又は３４）と共振コンデ
ンサ（参照符号２６，２７又は３５，３６）と鍋（参照
符号３又は４）とからなる共振負荷回路側の力率が進み
及び遅れの双方の領域に渡った周波数の高周波電力を供
給可能にしている。As the diodes connected in reverse parallel to the IGBTs constituting the inverter main circuits 51 and 52, a diode having a rating that allows the above-described reverse recovery current, a first recovery diode that can reduce the reverse recovery current, and the like are selected. As a result, inverter main circuits 51 and 52
, The power factor on the side of the resonance load circuit comprising the heating coil (reference number 25 or 34), the resonance capacitor (reference number 26, 27 or 35, 36) and the pot (reference number 3 or 4) both leads and delays. It is possible to supply high-frequency power of a frequency over a range.
【００２６】図２は、図１に示したインバータ装置にお
いて、加熱コイル（参照符号２５又は３４）と共振コン
デンサ（参照符号２６，２７又は３５，３６）と鍋（参
照符号３又は４）とからなる共振負荷回路に供給される
高周波電力の周波数と該負荷回路に注入される有効電力
との関係を示す特性図であり、例えば紙面右側の特性を
鍋３側とし、紙面左側の特性を鍋４側とすると、それぞ
れの特性におけるピークの周波数はそれぞれの共振負荷
回路の共振周波数であり、それぞれのインバータ装置か
ら出力する周波数が前記共振周波数より高い周波数では
該インバータ装置から見た共振負荷回路側の力率が遅れ
領域であり、また、低い周波数では該インバータ装置か
ら見た共振負荷回路側の力率が進み領域である。FIG. 2 shows the inverter device shown in FIG. 1 including a heating coil (reference numeral 25 or 34), a resonance capacitor (reference numeral 26, 27 or 35, 36), and a pot (reference numeral 3 or 4). FIG. 4 is a characteristic diagram showing a relationship between the frequency of the high-frequency power supplied to the resonant load circuit and the active power injected into the load circuit. For example, the characteristic on the right side of the drawing is the pot 3 side, and the characteristic on the left side of the drawing is the pan 4 , The peak frequency in each characteristic is the resonance frequency of each resonance load circuit, and the frequency output from each inverter device is higher than the resonance frequency. The power factor is in a lag region, and at a low frequency, the power factor on the resonance load circuit side as viewed from the inverter device is in a leading region.
【００２７】すなわち、この発明の制御方法では鍋３側
のインバータ装置は前記進み領域で運転し、鍋４側は前
記遅れ領域で運転し、それぞれのインバータ装置が出力
する周波数を所定の範囲内で、インバータ主回路５１，
５２それぞれに対してＰＷＭ（パルス幅変調）制御とＰ
ＦＭ（パルス周波数変調）制御とを併用することによ
り、さらに、この併用結果のＰＷＭ制御又はＰＦＭ制御
で得られるパルス列信号を間引きしてインバータ主回路
５１又は５２を動作させることにより、前記共振負荷回
路に注入する有効電力、すなわち、鍋３又は鍋４への加
熱電力を広範囲に調整することができる。That is, in the control method of the present invention, the inverter device on the pot 3 side operates in the advance region, the pot 4 operates in the delay region, and the frequency output by each inverter device falls within a predetermined range. , The inverter main circuit 51,
52 (PWM) control and P
By using together with the FM (pulse frequency modulation) control, the pulse train signal obtained by the PWM control or the PFM control resulting from this combined use is thinned out to operate the inverter main circuit 51 or 52, whereby the resonance load circuit is operated. , That is, the heating power to the pan 3 or the pan 4 can be adjusted over a wide range.
【００２８】その結果として、図２に示す◇印の点また
は印の点の周波数の高周波電力で鍋３又は鍋４への加熱
電力が定格値に達するが、このときの周波数の差も僅か
にすることができる。As a result, the heating power to the pot 3 or the pot 4 reaches the rated value with the high-frequency power of the frequency of the point indicated by the mark or the point indicated by the mark in FIG. can do.
【００２９】図３は、図１に示したインバータ設備５に
よるこの発明の第１の実施例を示すフローチャートであ
る。FIG. 3 is a flow chart showing a first embodiment of the present invention by the inverter equipment 5 shown in FIG.
【００３０】運転に先立って、このインバータ設備５の
特性仕様，鍋の材質などから、２組のインバータ装置の
出力周波数ｆo を起動時にはｆref に、この周波数での
前記共振負荷回路側の力率が進み，遅れを判定するため
に前記負荷回路へ注入する有効電力をＷdet に、変化さ
せる出力周波数をｆdet （ｆdet ＞ｆref ）に予め設定
しておく。Prior to the operation, the output frequency f o of the two sets of inverters is set to f ref at startup, based on the characteristic specifications of the inverter equipment 5 and the material of the pot, and the force on the resonance load circuit side at this frequency. In order to determine whether the rate is advanced or delayed, the active power injected into the load circuit is set to W det and the output frequency to be changed is set to f det (f det > f ref ) in advance.
【００３１】以下に、図３に示したフローチャートに従
って、個々のインバータ装置の起動から通常運転に入る
までの動作を説明する。The operation from the start of each inverter device to the start of normal operation will be described below with reference to the flowchart shown in FIG.
【００３２】インバータ装置が起動すると、紙面左部の
流れに入り、インバータ装置は出力周波数を前記ｆref
でインバータ主回路５１又は５２をＰＷＭ制御により出
力を徐々に増大させ、例えば、整流回路２２または３１
の出力電圧の検出値と出力電流の検出値との乗算演算値
に基づいて鍋３又は４の加熱電力を求め、この加熱電力
が前記Ｗdet に達するまで、インバータ主回路５１又は
５１の高周波出力をＰＷＭ制御により増大させる。When the inverter starts, the flow enters the flow on the left side of the drawing, and the inverter changes the output frequency to fref.
, The output of the inverter main circuit 51 or 52 is gradually increased by PWM control.
The heating power of the pan 3 or 4 is determined based on the multiplied operation value of the output voltage detection value and the output current detection value, and the high frequency output of the inverter main circuit 51 or 51 is obtained until the heating power reaches the W det. Is increased by the PWM control.
【００３３】鍋３又は４の加熱電力が前記Ｗdet に達す
ると、紙面左部の流れから紙面中央部の流れに入り、イ
ンバータ装置は高周波電力値をそのままで出力周波数の
みを前記ｆref から前記ｆdet にインバータ主回路５１
又は５２のＰＦＭ制御により徐々に増加させ、この高く
した周波数の高周波電力による前記加熱電力の検出値の
変化を監視し、前記検出値が前記Ｗdet より増大したと
きには前記インバータ装置が前記進み領域で運転してい
ると判定し、また、該検出値が前記Ｗdet より減少した
ときには前記遅れ領域で運転していると判定し、さら
に、前記検出値に変化が認められないときには、前記共
振負荷回路の共振周波数の近辺にあると判定する。When the heating power of the pot 3 or 4 reaches the above-mentioned W det , the flow from the left side of the drawing to the flow of the center of the drawing enters, and the inverter device outputs only the output frequency from the above f ref from the f ref while keeping the high frequency power value. Inverter main circuit 51 for f det
Or gradually increase by the PFM control of 52, and monitor the change of the detected value of the heating power due to the high frequency power of the increased frequency, and when the detected value is larger than the W det, the inverter device is operated in the advance region. When it is determined that the vehicle is operating, and when the detected value is smaller than the W det , it is determined that the vehicle is operating in the delay region, and when no change is found in the detected value, the resonance load circuit Is determined to be near the resonance frequency of.
【００３４】上述の判定が終了すると、チューニングが
終了したとして、紙面右側の流れに移り、インバータ装
置は出力周波数を前記ｆdet から前記ｆref にインバー
タ主回路５１又は５２のＰＦＭ制御により徐々に減少さ
せ、前記ｆref に達すると、紙面左部の通常電力制御に
入り、前記チューニング結果と鍋３又は４の加熱を加熱
電力設定値とに基づき、インバータ主回路５１又は５２
のＰＷＭ制御またはＰＦＭ制御を行う。When the above determination is completed, it is determined that tuning has been completed, and the flow moves to the right side of the drawing, and the inverter device gradually reduces the output frequency from the f det to the f ref by the PFM control of the inverter main circuit 51 or 52. When f ref is reached, the normal power control on the left side of the paper is started, and the heating of the pan 3 or 4 is controlled based on the tuning result and the heating power set value based on the inverter main circuit 51 or 52.
PWM control or PFM control.
【００３５】図４は、図１に示したインバータ設備５に
よるこの発明の第２の実施例を示すフローチャートであ
る。FIG. 4 is a flowchart showing a second embodiment of the present invention by the inverter equipment 5 shown in FIG.
【００３６】運転に先立って、このインバータ設備５の
特性仕様，鍋の材質などから、２組のインバータ装置の
出力周波数ｆo を起動時にはｆref に、この周波数での
前記共振負荷回路側の力率が進み，遅れを判定するため
に前記負荷回路へ注入する有効電力をＷdet に、変化さ
せる出力周波数をｆdet （ｆdet ＜ｆref ）に予め設定
しておく。Prior to operation, the output frequency f o of the two sets of inverters is set to f ref at startup, based on the characteristic specifications of the inverter equipment 5 and the material of the pot, and the force on the resonance load circuit side at this frequency. In order to determine whether the rate is advanced or delayed, the active power injected into the load circuit is set to W det and the output frequency to be changed is set to f det (f det <f ref ) in advance.
【００３７】すなわち図４に示したフローチャートによ
る実施例が、図３に示したフローチャートによる実施例
と異なる点は周波数ｆdet がｆdet ＜ｆref の関係にあ
り、従って、インバータ装置が出力する高周波電力によ
る前記加熱電力の検出値の変化に対する領域の判定が先
述の図３のフローチャートとは逆である。That is, the embodiment according to the flowchart shown in FIG. 4 is different from the embodiment according to the flowchart shown in FIG. 3 in that the frequency f det has a relation of f det <f ref. The determination of the area with respect to the change in the detected value of the heating power due to the power is opposite to the above-described flowchart of FIG.
【００３８】図５は、図１に示したインバータ設備５に
よるこの発明の第３の実施例を示すフローチャートであ
る。FIG. 5 is a flowchart showing a third embodiment of the present invention by the inverter equipment 5 shown in FIG.
【００３９】運転に先立って、このインバータ設備５の
特性仕様，鍋の材質などから、２組のインバータ装置の
出力周波数ｆo を起動時にはｆref に、この周波数での
前記共振負荷回路側の力率が進み，遅れを判定するため
にインバータ主回路５１又は５２を構成するいずれか一
方のＩＧＢＴのオン，オフの際の時比率λを予め設定し
た値に、変化させる周波数をｆdet （ｆdet ＞ｆref ）
にしておく。Prior to the operation, the output frequency f o of the two sets of inverters is set to f ref when starting, based on the characteristic specifications of the inverter equipment 5 and the material of the pot, and the force on the resonance load circuit side at this frequency. In order to determine whether the rate is advanced or delayed, the frequency at which one of the IGBTs constituting the inverter main circuit 51 or 52 is turned on or off is set to a preset value, and the frequency to be changed is set to f det (f det > F ref )
Keep it.
【００４０】ここで、時比率λは前記ＩＧＢＴの〔オン
時間／（オン時間＋オフ時間）〕で定義される値であ
る。Here, the duty ratio λ is a value defined by [on time / (on time + off time)] of the IGBT.
【００４１】以下に、図５に示したフローチャートに従
って、個々のインバータ装置の起動から通常運転に入る
までの動作を説明する。The operation from the start of each inverter device to the start of normal operation will be described below with reference to the flowchart shown in FIG.
【００４２】インバータ装置が起動すると、紙面左部の
流れに入り、インバータ装置は出力周波数を前記ｆref
でインバータ主回路５１又は５２をＰＷＭ制御により、
前記時比率λの設定値に達するまで、高周波電力を徐々
に増大させ、例えば、整流回路２２または３１の出力電
圧の検出値と出力電流の検出値との乗算演算値に基づい
て、前記時比率λの設定値に達したときの鍋３又は４の
加熱電力を求め、この加熱電力をＷdet として記憶して
おく。When the inverter starts, the flow starts at the left side of the drawing, and the inverter changes the output frequency to fref.
The inverter main circuit 51 or 52 is controlled by PWM control.
The high-frequency power is gradually increased until the set value of the duty ratio λ is reached. For example, based on the multiplication operation value of the detected value of the output voltage of the rectifier circuit 22 or 31 and the detected value of the output current, The heating power of the pan 3 or 4 when the set value of λ is reached is obtained, and this heating power is stored as W det .
【００４３】インバータ主回路５１又は５２が前記時比
率λの設定値に達すると、紙面左部の流れから紙面中央
部の流れに入り、インバータ装置は高周波電力値をその
ままで出力周波数のみを前記ｆref から前記ｆdet にイ
ンバータ主回路５１又は５２のＰＦＭ制御により徐々に
増加させ、この高くした周波数の高周波電力による前記
加熱電力の検出値の変化を監視し、前記検出値が前記Ｗ
det より増大したときには前記インバータ装置が前記進
み領域で運転していると判定し、また、該検出値が前記
Ｗdet より減少したときには前記遅れ領域で運転してい
ると判定し、さらに、前記検出値に変化が認められない
ときには、前記共振負荷回路の共振周波数の近辺にある
と判定する。When the inverter main circuit 51 or 52 reaches the set value of the duty ratio λ, the flow starts from the flow on the left side of the drawing to the flow on the center of the drawing, and the inverter device outputs only the output frequency while keeping the high frequency power value as it is. From ref to f det , gradually increased by PFM control of the inverter main circuit 51 or 52, and the change in the detected value of the heating power due to the high frequency power of the increased frequency is monitored.
When it is greater than det, it is determined that the inverter device is operating in the advance region, and when the detected value is less than W det, it is determined that it is operating in the delay region, If no change is found in the value, it is determined that the value is near the resonance frequency of the resonance load circuit.
【００４４】上述の判定が終了すると、チューニングが
終了したとして、紙面右側の流れに移り、インバータ装
置は出力周波数を前記ｆdet から前記ｆref にインバー
タ主回路５１又は５２のＰＦＭ制御により徐々に減少さ
せ、前記ｆref に達すると、紙面左部の通常電力制御に
入り、前記チューニング結果と鍋３又は４の加熱を加熱
電力設定値とに基づき、インバータ主回路５１又は５２
のＰＷＭ制御またはＰＦＭ制御を行う。When the above determination is completed, the tuning is completed, and the flow shifts to the flow on the right side of the drawing. The inverter device gradually reduces the output frequency from the f det to the f ref by the PFM control of the inverter main circuit 51 or 52. When f ref is reached, the normal power control on the left side of the paper is started, and the heating of the pan 3 or 4 is controlled based on the tuning result and the heating power set value based on the inverter main circuit 51 or 52.
PWM control or PFM control.
【００４５】図６は、図１に示したインバータ設備５に
よるこの発明の第４の実施例を示すフローチャートであ
る。FIG. 6 is a flowchart showing a fourth embodiment of the present invention by the inverter equipment 5 shown in FIG.
【００４６】運転に先立って、このインバータ設備５の
特性仕様，鍋の材質などから、２組のインバータ装置の
出力周波数ｆo を起動時にはｆref に、この周波数での
前記共振負荷回路側の力率が進み，遅れを判定するため
にインバータ主回路５１又は５２を構成するいずれか一
方のＩＧＢＴのオン，オフの際の時比率λを予め設定し
た値に、変化させる周波数ｆdet （ｆdet ＜ｆref ）に
しておく。Prior to the operation, the output frequency f o of the two sets of inverters is set to f ref at startup, based on the characteristic specifications of the inverter equipment 5 and the material of the pot, and the force on the resonance load circuit side at this frequency. The frequency f det (f det <) where the duty ratio λ when one of the IGBTs constituting the inverter main circuit 51 or 52 is turned on or off to a preset value in order to determine whether the rate is advanced or delayed. f ref ).
【００４７】すなわち図６に示したフローチャートによ
る実施例が、図５に示したフローチャートによる実施例
と異なる点は周波数ｆdet がｆdet ＜ｆref の関係にあ
り、従って、インバータ装置が出力する高周波電力によ
る前記加熱電力の検出値の変化に対する領域の判定が先
述の図５のフローチャートとは逆である。That is, the embodiment according to the flowchart shown in FIG. 6 is different from the embodiment according to the flowchart shown in FIG. 5 in that the frequency f det has a relation of f det <f ref. The determination of the area with respect to the change in the detected value of the heating power due to the power is opposite to the above-described flowchart of FIG.
【００４８】図７は、図１に示したインバータ設備５に
よるこの発明の第５の実施例を示すフローチャートであ
る。FIG. 7 is a flowchart showing a fifth embodiment of the present invention by the inverter equipment 5 shown in FIG.
【００４９】運転に先立って、このインバータ設備５の
特性仕様，鍋の材質などから、２組のインバータ装置の
出力周波数ｆo を起動時にはｆref に、この周波数での
前記共振負荷回路側の力率が進み，遅れを判定するため
に前記負荷回路へ注入する有効電力をＷdet に、変化さ
せる出力周波数をｆdet （ｆdet ＜ｆref 又はｆdet＞
ｆref ）に予め設定しておく。Prior to the operation, the output frequency f o of the two sets of inverters is set to f ref at startup, based on the characteristic specifications of the inverter equipment 5 and the material of the pot, and the force on the resonance load circuit side at this frequency. The active power to be injected into the load circuit to determine the advance and the delay is W det and the output frequency to be changed is f det (f det <f ref or f det >
f ref ) is set in advance.
【００５０】すなわち図７に示したフローチャートによ
る実施例が、図３又は図４に示したフローチャートによ
る実施例と異なる点は、前述のチューニングが終了した
後、紙面左部の通常電力制御に入り、前記チューニング
結果と前記ｆdet と鍋３又は４の加熱を加熱電力設定値
とに基づき、インバータ主回路５１又は５２のＰＷＭ制
御またはＰＦＭ制御を行うことである。That is, the difference between the embodiment according to the flowchart shown in FIG. 7 and the embodiment according to the flowchart shown in FIG. 3 or FIG. PWM control or PFM control of the inverter main circuit 51 or 52 is performed based on the tuning result, the f det, and the heating of the pan 3 or 4 based on the heating power set value.
【００５１】その結果、インバータ主回路５１又は５２
の出力周波数ｆo を前記ｆdet から前記ｆref に戻す時
間が省略されるので、前記チューニング時間が短縮さ
れ、このインバータ設備５の起動から通常運転に入るま
での出力周波数ｆo の変化も滑らかになる。As a result, inverter main circuit 51 or 52
Since the output frequency f o the time to return to the f ref from the f det of is omitted, it is shortened the tuning time, also smooth change of the output frequency f o from the activation of the inverter system 5 until it enters the normal operation become.
【００５２】なお図１に示した実施の形態回路は、それ
ぞれのインバータ装置として、ハーフブリッジ方式で共
振コンデンサを2個用いた電圧形インバータ装置の例を
示したが、フルブリッジ方式の電圧形インバータ装置、
直流入力の中性点電位を利用したハーフブリッジ方式の
電圧形インバータ装置などでも、この発明の制御方法を
実施することができる。Although the circuit shown in FIG. 1 is an example of a voltage-type inverter device using two resonant capacitors in a half-bridge system as each inverter device, a voltage-type inverter device in a full-bridge system is used. apparatus,
The control method of the present invention can also be implemented in a half-bridge type voltage-type inverter device using a neutral point potential of a DC input.
【００５３】[0053]
【発明の効果】この発明によれば、複数組の共振負荷回
路それぞれに対して個別に高周波電力を供給する該複数
組のインバータ装置を同一筐体内に配置してなるインバ
ータ設備において、起動時に前記負荷回路に注入される
有効電力の微小な変化から、前記負荷回路の運転位相を
チューニングし、その後、通常の運転に入り、ＰＷＭ制
御により有効電力の調整を行ない、該有効電力の最大付
近及び最小付近においてはＰＷＭ制御とＰＦＭ制御の併
用、さらに、この併用結果のＰＷＭ制御又はＰＦＭ制御
で得られるパルス列信号を間引きしてインバータ装置を
動作させることにより、前記共振負荷回路に注入する有
効電力の広範囲な調整と、先述の電磁音の解消とが可能
になる。According to the present invention, in an inverter facility in which a plurality of sets of inverter devices for individually supplying high-frequency power to a plurality of sets of resonance load circuits are arranged in the same housing, The operation phase of the load circuit is tuned from a minute change in the active power injected into the load circuit, and then the normal operation is started, and the active power is adjusted by PWM control. In the vicinity, the PWM control and the PFM control are used together, and furthermore, the pulse train signal obtained by the PWM control or the PFM control as a result of the combined use is thinned out to operate the inverter device. Adjustment and cancellation of the aforementioned electromagnetic sound.
【００５４】その結果、誘導加熱される鍋の中の被加熱
物が多彩で、その加熱電力も広範囲にわたる業務用の電
磁調理器のインバータ設備として好適である。As a result, the objects to be heated in the pot to be induction-heated are various, and the heating power thereof is suitable as an inverter equipment of an electromagnetic cooker for business use in a wide range.
【図１】この発明の実施の形態を示すインバータ設備の
回路構成図FIG. 1 is a circuit configuration diagram of an inverter facility showing an embodiment of the present invention.
【図２】図１の動作を説明する特性図FIG. 2 is a characteristic diagram illustrating the operation of FIG. 1;
【図３】この発明の第１の実施例を示すフローチャートFIG. 3 is a flowchart showing a first embodiment of the present invention.
【図４】この発明の第２の実施例を示すフローチャートFIG. 4 is a flowchart showing a second embodiment of the present invention.
【図５】この発明の第３の実施例を示すフローチャートFIG. 5 is a flowchart showing a third embodiment of the present invention.
【図６】この発明の第４の実施例を示すフローチャートFIG. 6 is a flowchart showing a fourth embodiment of the present invention.
【図７】この発明の第５の実施例を示すフローチャートFIG. 7 is a flowchart showing a fifth embodiment of the present invention.
【図８】従来例を示すインバータ装置の回路構成図FIG. 8 is a circuit configuration diagram of an inverter device showing a conventional example.
【図９】図８の動作を説明する特性図FIG. 9 is a characteristic diagram illustrating the operation of FIG. 8;
１…交流電源、２，５…インバータ設備、３，４…鍋、
２１…ノイズフィルタ、２２，３１…整流回路、２３，
３２…コンデンサ、２４，３３…インバータ主回路、２
５，３４…加熱コイル、２６，２７，３５，３６…共振
コンデンサ、５１，５２…インバータ主回路。1 ... AC power supply, 2,5 ... Inverter equipment, 3,4 ... Pot,
21: noise filter, 22, 31: rectifier circuit, 23,
32: capacitors, 24, 33: inverter main circuit, 2
5, 34 ... heating coil, 26, 27, 35, 36 ... resonance capacitor, 51, 52 ... inverter main circuit.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3K051 AB08 AC09 AC12 AC14 AC18 AD13 BD04 BD19 CD14 5H007 AA01 BB04 BB11 CA01 CB04 CB12 CB22 CC05 DA03 DB01 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K051 AB08 AC09 AC12 AC14 AC18 AD13 BD04 BD19 CD14 5H007 AA01 BB04 BB11 CA01 CB04 CB12 CB22 CC05 DA03 DB01
Claims (9)
個別に高周波電力を供給する該複数組のインバータ装置
を同一筐体内に配置してなるインバータ設備において、 前記共振負荷回路側の力率が進み及び遅れの双方の領域
に渡った周波数の高周波電力を前記インバータ装置それ
ぞれが前記負荷回路に供給することにより、 前記インバータ装置が出力する所望の高周波電力の周波
数それぞれを所定の範囲内にしたことを特徴とするイン
バータ設備の制御方法。1. An inverter facility comprising a plurality of sets of inverter devices for individually supplying high-frequency power to each of a plurality of sets of resonant load circuits in the same housing, wherein the power factor on the resonant load circuit side is Each of the inverters supplies the load circuit with high-frequency power having a frequency that covers both the leading and lagging regions, so that the frequency of the desired high-frequency power output by the inverter falls within a predetermined range. A method for controlling inverter equipment.
方法において、 前記共振負荷回路を形成するそれぞれの鍋を誘導加熱す
ることを特徴とするインバータ設備の制御方法。2. The method for controlling inverter equipment according to claim 1, wherein each pot forming the resonance load circuit is induction-heated.
タ設備の制御方法において、 前記それぞれのインバータ装置が起動時に、 所定の周波数の高周波電力での前記共振負荷回路側の力
率が進み領域か遅れ領域かを判定するために、 前記インバータ装置それぞれが前記所定周波数の高周波
電力を該インバータ装置のＰＷＭ制御により徐々に増大
させつつ前記共振負荷回路に供給し、該負荷回路に注入
される有効電力の検出値が所定の値に達したときの高周
波電力に対して、その周波数のみを若干高くした高周波
電力を前記負荷回路に供給し、 この高くした周波数の高周波電力による前記検出値の変
化を監視し、 前記検出値が増大したときには前記インバータ装置が前
記進み領域で運転していると判定し、また、該検出値が
減少したときには前記遅れ領域で運転していると判定す
ることを特徴とするインバータ設備の制御方法。3. The control method of the inverter equipment according to claim 1, wherein when the respective inverter devices are started, a power factor on a side of the resonance load circuit with a high frequency power of a predetermined frequency is advanced. In order to determine whether the inverter device is in the delay region or not, each of the inverter devices supplies the high-frequency power of the predetermined frequency to the resonance load circuit while gradually increasing the high-frequency power by the PWM control of the inverter device. With respect to the high-frequency power when the detected value of the power reaches a predetermined value, the high-frequency power whose only frequency is slightly increased is supplied to the load circuit, and the change in the detected value due to the high-frequency power of the increased frequency is measured. When the detected value increases, it is determined that the inverter device is operating in the advance region, and when the detected value decreases, Control method for an inverter equipment and judging to be operated in serial delay bounds.
タ設備の制御方法において、 前記それぞれのインバータ装置が起動時に、 所定の周波数の高周波電力での前記共振負荷回路側の力
率が進み領域か遅れ領域かを判定するために、 前記インバータ装置それぞれが前記所定周波数の高周波
電力を該インバータ装置のＰＷＭ制御により徐々に増大
させつつ前記共振負荷回路に供給し、該負荷回路に注入
される有効電力の検出値が所定の値に達したときの高周
波電力に対して、その周波数のみを若干低くした高周波
電力を前記負荷回路に供給し、 この低くした周波数の高周波電力による前記検出値の変
化を監視し、 前記検出値が増大したときには前記インバータ装置が前
記遅れ領域で運転していると判定し、また、該検出値が
減少したときには前記進み領域で運転していると判定す
ることを特徴とするインバータ設備の制御方法。4. The method according to claim 1, wherein when the respective inverter devices are started, a power factor on a side of the resonance load circuit with a high frequency power of a predetermined frequency is advanced. In order to determine whether the inverter device is in the delay region or not, each of the inverter devices supplies the high-frequency power of the predetermined frequency to the resonance load circuit while gradually increasing the high-frequency power by the PWM control of the inverter device. The high-frequency power when the detected value of the power reaches a predetermined value is supplied to the load circuit with the high-frequency power slightly lower in frequency, and the change in the detected value due to the high-frequency power at the lower frequency is calculated. Monitoring, when the detection value increases, it is determined that the inverter device is operating in the delay region, and when the detection value decreases, Control method for an inverter equipment and judging to be operated in serial flow proceeds area.
タ設備の制御方法において、 前記それぞれのインバータ装置が起動時に、 所定の周波数の高周波電力での前記共振負荷回路側の力
率が進み領域か遅れ領域かを判定するために、 前記インバータ装置それぞれが前記所定周波数の高周波
電力を該インバータ装置の時比率λの値を徐々に増大さ
せつつ前記共振負荷回路に供給し、該時比率λが所定の
値に達したときの高周波電力に対して、その周波数のみ
を若干高くした高周波電力を前記負荷回路に供給し、 この高くした周波数の高周波電力により前記共振負荷回
路に注入される有効電力の検出値の変化を監視し、 前記検出値が増大したときには前記インバータ装置が前
記進み領域で運転していると判定し、また、該検出値が
減少したときには前記遅れ領域で運転していると判定す
ることを特徴とするインバータ設備の制御方法。5. The control method for an inverter facility according to claim 1, wherein when the respective inverter devices are started, a power factor on a side of the resonance load circuit at a high frequency power of a predetermined frequency is advanced. In order to determine whether the inverter is in the delay region, each of the inverter devices supplies the high frequency power of the predetermined frequency to the resonance load circuit while gradually increasing the value of the duty ratio λ of the inverter device. With respect to the high-frequency power when the predetermined value is reached, the high-frequency power whose frequency alone is slightly increased is supplied to the load circuit, and the high-frequency power of the increased frequency is used to inject the active power injected into the resonance load circuit. Monitoring a change in the detected value, when the detected value increases, it is determined that the inverter device is operating in the advance region, and when the detected value decreases, Is a method for controlling inverter equipment, wherein it is determined that the vehicle is operating in the delay range.
タ設備の制御方法において、 前記それぞれのインバータ装置が起動時に、 所定の周波数の高周波電力での前記共振負荷回路側の力
率が進み領域か遅れ領域かを判定するために、 前記インバータ装置それぞれが前記所定周波数の高周波
電力を該インバータ装置の時比率λの値を徐々に増大さ
せつつ前記共振負荷回路に供給し、該時比率λが所定の
値に達したときの高周波電力に対して、その周波数のみ
を若干低くした高周波電力を前記負荷回路に供給し、 この低くした周波数の高周波電力により前記共振負荷回
路に注入される有効電力の検出値の変化を監視し、 前記検出値が増大したときには前記インバータ装置が前
記遅れ領域で運転していると判定し、また、該検出値が
減少したときには前記進み領域で運転していると判定す
ることを特徴とするインバータ設備の制御方法。6. The method for controlling inverter equipment according to claim 1, wherein the power factor on the resonance load circuit side at a high frequency power of a predetermined frequency is advanced when the respective inverter devices are started. In order to determine whether the inverter is in the delay region, each of the inverter devices supplies the high frequency power of the predetermined frequency to the resonance load circuit while gradually increasing the value of the duty ratio λ of the inverter device. With respect to the high-frequency power when the predetermined value is reached, high-frequency power whose frequency alone is slightly reduced is supplied to the load circuit, and the high-frequency power of the reduced frequency is used to inject the active power injected into the resonance load circuit. Monitoring the change in the detected value, when the detected value increases, it is determined that the inverter device is operating in the delay region, and when the detected value decreases, Is a method for controlling inverter equipment, wherein it is determined that the vehicle is operating in the advance region.
のインバータ設備の制御方法において、 前記所定周波数より若干変化させた周波数の高周波電力
で前記共振負荷回路側の力率が進み領域か遅れ領域かを
判定した後、 前記それぞれのインバータ装置は前記所定周波数で通常
運転に入ることを特徴とするインバータ設備の制御方
法。7. The control method for an inverter equipment according to claim 3, wherein the power factor on the resonance load circuit side is in a region where the power factor on the resonance load circuit side is advanced with a high frequency power having a frequency slightly changed from the predetermined frequency. A method of controlling inverter equipment, characterized in that, after judging whether the current time is in a delay region, each of the inverter devices enters a normal operation at the predetermined frequency.
のインバータ設備の制御方法において、 前記所定周波数より若干変化させた周波数の高周波電力
で前記共振負荷回路側の力率が進み領域か遅れ領域かを
判定した後、 前記それぞれのインバータ装置は前記変化させた周波数
で通常運転に入ることを特徴とするインバータ設備の制
御方法。8. The method for controlling an inverter equipment according to claim 3, wherein the power factor on the resonance load circuit side is in a region where the power factor on the resonance load circuit side is advanced by a high-frequency power having a frequency slightly changed from the predetermined frequency. A method for controlling inverter equipment, characterized in that, after judging a delay region, each of the inverter devices enters a normal operation at the changed frequency.
タ設備の制御方法において、 前記それぞれのインバータ装置が前記周波数で通常運転
中に、前記共振負荷回路それぞれに注入される有効電力
の検出値を監視し、 前記検出値がそれぞれの有効電力指令値に対して過不足
状態になったときに、 前記インバータ装置はＰＷＭ制御からＰＦＭ制御に切り
替え、 前記判定結果に基づいて、切り替えた後の前記インバー
タ装置が出力する周波数の増減を行うことにより前記過
不足状態を解消することを特徴とするインバータ設備の
制御方法。9. The method for controlling inverter equipment according to claim 7, wherein the detected value of the active power injected into each of the resonance load circuits during normal operation of the respective inverter devices at the frequency. When the detected value is in excess or deficiency with respect to each active power command value, the inverter device switches from PWM control to PFM control, and based on the determination result, A method for controlling inverter equipment, wherein the excess / shortage state is eliminated by increasing or decreasing the frequency output by the inverter device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000127343A JP4273381B2 (en) | 2000-04-27 | 2000-04-27 | Inverter equipment control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000127343A JP4273381B2 (en) | 2000-04-27 | 2000-04-27 | Inverter equipment control method |
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| Publication Number | Publication Date |
|---|---|
| JP2001313159A true JP2001313159A (en) | 2001-11-09 |
| JP4273381B2 JP4273381B2 (en) | 2009-06-03 |
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ID=18636955
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012109210A (en) * | 2010-10-25 | 2012-06-07 | Mitsubishi Electric Corp | Induction heating cooker |
| JP2013162681A (en) * | 2012-02-07 | 2013-08-19 | Nippon Steel & Sumitomo Metal | Induction heating inverter power supply and overvoltage protection method thereof |
-
2000
- 2000-04-27 JP JP2000127343A patent/JP4273381B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012109210A (en) * | 2010-10-25 | 2012-06-07 | Mitsubishi Electric Corp | Induction heating cooker |
| JP2013162681A (en) * | 2012-02-07 | 2013-08-19 | Nippon Steel & Sumitomo Metal | Induction heating inverter power supply and overvoltage protection method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4273381B2 (en) | 2009-06-03 |
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