JPH03265494A - Control circuit for inverter unit - Google Patents
Control circuit for inverter unitInfo
- Publication number
- JPH03265494A JPH03265494A JP2061286A JP6128690A JPH03265494A JP H03265494 A JPH03265494 A JP H03265494A JP 2061286 A JP2061286 A JP 2061286A JP 6128690 A JP6128690 A JP 6128690A JP H03265494 A JPH03265494 A JP H03265494A
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- Prior art keywords
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- output
- output frequency
- circuit
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- 230000006698 induction Effects 0.000 abstract description 10
- 238000005299 abrasion Methods 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 3
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Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明はインバータ装置の制御回路に関し、特に停止
状態から加速運転に、あるいは定速運転から減速運転に
切り換わるとき、電動機と負荷装置の接続に使用される
歯車の歯に加わる力を弱めることができるインバータ装
置の制御回路に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a control circuit for an inverter device, and in particular, when switching from a stopped state to accelerated operation or from constant speed operation to deceleration operation, the connection between an electric motor and a load device is controlled. This invention relates to a control circuit for an inverter device that can weaken the force applied to the teeth of a gear used in the invention.
［従来の技術］
第３図は従来のインバータ装置の制御回路を示す回路構
成図であり、図において、（１）はインバータ装置の順
変換部、（２）は平滑コンデンサ、（３）は逆変換部、
（４）は誘導電動機、（５）は目標周波数を設定する目
標周波数設定回路、（６）は加減速時間を設定する加減
速時間設定回路、（７）は出力周波数指令と目標周波数
から運転モードを決定し、この運転モードと加減速時間
から次に出力する周波数指令を計算し、出力する出力周
波数指令決定回路（以下、出力周波数決定回路と略記す
る） 、（８）は出力周波数指令を基にしてＰＷＭ（パ
ルス幅変調）信号を作成するＰＷＭ信号作成回路、（９
）はＰＷＭ信号にしたがって、逆変換部（３）のスイッ
チング素子を駆動する駆動回路である。[Prior Art] Fig. 3 is a circuit configuration diagram showing a control circuit of a conventional inverter device. In the figure, (1) is a forward conversion section of the inverter device, (2) is a smoothing capacitor, and (3) is a reverse conversion section,
(4) is an induction motor, (5) is a target frequency setting circuit that sets the target frequency, (6) is an acceleration/deceleration time setting circuit that sets acceleration/deceleration time, and (7) is an operation mode based on the output frequency command and target frequency. An output frequency command determination circuit (hereinafter abbreviated as output frequency determination circuit) calculates and outputs a frequency command to be output next from this operation mode and acceleration/deceleration time. A PWM signal generation circuit (9) that generates a PWM (pulse width modulation) signal by
) is a drive circuit that drives the switching element of the inverse conversion section (3) according to the PWM signal.
次に第３図の回路の動作について説明する。順変換部（
１）は入力された三相交流電圧を脈流電圧に変換し、平
滑コンデンサ（２）はこの脈流電圧を平滑して直流に変
換し、逆変換部（３）はこの直流電圧を可変周波数、可
変電圧の交流電圧に変換し、誘導電動機（４）はインバ
ータ装置により可変速駆動される。Next, the operation of the circuit shown in FIG. 3 will be explained. Forward conversion unit (
1) converts the input three-phase AC voltage into a pulsating voltage, the smoothing capacitor (2) smoothes this pulsating voltage and converts it into DC, and the inverse converter (3) converts this DC voltage into a variable frequency , is converted into a variable voltage AC voltage, and the induction motor (4) is driven at variable speed by an inverter device.
目標周波数設定回路（５）はインバータ装置の目標運転
周波数を設定し、加減速時間設定回路（６）はこの目標
周波数までの加減速時間を設定する。The target frequency setting circuit (5) sets the target operating frequency of the inverter device, and the acceleration/deceleration time setting circuit (6) sets the acceleration/deceleration time up to this target frequency.
また、出力周波数決定回路（７）は現在出力中の出力指
令と目標周波数を比較し、前者が後者よりも小さいとき
には加速モード、大きいときには減速モード、等しいと
きには定速モードというようにインバータ装置の運転モ
ードを決定し、さらに、この運転モードと加減速時間か
ら次に出力する出力周波数指令を計算し、出力する。Ｐ
ＷＭ信号作成回路（８）は出力周波数指令を基にしてＰ
ＷＭ信号を作成して出力し、駆動回路（９）はこのＰＷ
Ｍ信号にしたがって、逆変換部（３）の６個のスイッチ
ング素子のＯＮ、ＯＦＦを制御する。The output frequency determining circuit (7) also compares the output command currently being output with the target frequency, and operates the inverter device in acceleration mode when the former is smaller than the latter, deceleration mode when it is larger, and constant speed mode when it is equal. The mode is determined, and the next output frequency command is calculated and output based on the operation mode and acceleration/deceleration time. P
The WM signal generation circuit (8) generates P based on the output frequency command.
A WM signal is created and output, and the drive circuit (9) uses this PW signal.
According to the M signal, ON and OFF of six switching elements of the inverse conversion section (3) are controlled.
第５図は例えば実開昭８１−１５８４９６号公報に開示
された他の従来のインバータ装置の制御回路を示す回路
構成図であり、図において、（１２）は加速期間中に減
速指令又は減速期間中に加速指令を検出すると同時に計
数を開始し、あらかじめ設定された保持時間の間だけ計
数を続けるとともに、この計数動作を継続中は出力周波
数保持信号を出力し続けるタイマー回路、（１３）は出
力周波数保持信号が入力されると同時にその時の出力周
波数決定回路（７）からの出力周波数指令を保持すると
ともに、出力周波数保持信号が入力されている間は保持
し続ける出力周波数保持回路である。FIG. 5 is a circuit configuration diagram showing a control circuit of another conventional inverter device disclosed in, for example, Japanese Utility Model Application No. 81-158496. In the figure, (12) indicates a deceleration command during an acceleration period or a deceleration period (13) is an output circuit that starts counting as soon as an acceleration command is detected during the process, continues counting only for a preset holding time, and continues to output an output frequency holding signal while this counting operation continues. The output frequency holding circuit holds the output frequency command from the output frequency determining circuit (7) at the same time as the frequency holding signal is input, and continues to hold the output frequency command from the output frequency determining circuit (7) while the output frequency holding signal is input.
次に、第５図の他の従来のインバータ装置の制御回路の
動作について説明する。タイマー回路（１２）は加速期
間中に減速指令又は減速期間中に加速指令が入力される
と同時に計数を開始し、あらかじめ設定された保持時間
の間だけ計数を続けるとともに、この計数動作を継続中
は出力周波数保持信号を出力し続ける。また、出力周波
数保持回路（１３）は、出力周波数保持信号が入力され
ると同時にその時の出力周波数決定回路（７）からの出
力周波数指令を保持するとともに、出力周波数保持信号
が入力されている間はこれを保持し続ける。Next, the operation of the control circuit of the other conventional inverter device shown in FIG. 5 will be explained. The timer circuit (12) starts counting at the same time as a deceleration command is input during the acceleration period or an acceleration command is input during the deceleration period, continues counting only for a preset holding time, and continues this counting operation. continues to output the output frequency holding signal. Further, the output frequency holding circuit (13) holds the output frequency command from the output frequency determining circuit (7) at the same time as the output frequency holding signal is input, and while the output frequency holding signal is being input. continues to hold this.
［発明が解決しようとする課題］
従来のインバータ装置（第３図の回路）は以上のように
構成されているので、通常その加減速パターンは第４図
に示すように、加速時、減速時ともに直線状に変化する
。そのため、インバータ装置により誘導電動機を停止状
態から加速運転する際や、定速運転から減速運転に切り
換える際に、誘導電動機の回転加速度が急に不連続的に
変化することにより、誘導電動機と負荷装置の接続に使
用される歯車の歯に対して大きな力が働き、歯車の歯の
摩耗の速度を速めたり、最悪の場合には歯車の歯が欠け
てしまうという問題点があった。[Problems to be Solved by the Invention] Since the conventional inverter device (the circuit shown in Fig. 3) is configured as described above, its acceleration/deceleration pattern is usually as shown in Fig. 4 during acceleration and deceleration. Both change linearly. Therefore, when the inverter device accelerates the induction motor from a stopped state or switches from constant speed operation to deceleration operation, the rotational acceleration of the induction motor suddenly changes discontinuously, causing the induction motor and load device to A large force is applied to the teeth of the gears used to connect the gears, which causes the gear teeth to wear out faster, or in the worst case, cause the gear teeth to chip.
また、第５図の他の従来のインバータ装置では、その加
減速パターンは第６図に示すように、加速時に減速モー
ドに、あるいは減速時に加速モードに切換わる場合しか
考慮していないため、停止状態から加速モードに、ある
いは定速モードから減速モードに切換わる際には、上記
の歯車の歯の摩耗の速度を速めたり、最悪の場合には歯
車の歯が欠けてしまうという問題点は解消されていない
。In addition, in the other conventional inverter device shown in Fig. 5, the acceleration/deceleration pattern only considers the case of switching to deceleration mode when accelerating or switching to acceleration mode when decelerating, as shown in Fig. 6. When switching from state to acceleration mode or from constant speed mode to deceleration mode, the above-mentioned problem of accelerating the wear rate of the gear teeth or, in the worst case, causing the gear teeth to chip, is resolved. It has not been.
この発明は上記のような問題点を解決するためになされ
たものであり、インバータ装置の加減速パターンを、停
止状態から加速運転に、あるいは定速運転から減速運転
に切り換える際に、切り換え後、ある一定の周波数の変
化後にある一定時間の間、出力周波数の変化を停止させ
ることにより、誘導電動機と負荷装置の接続に使用され
る歯車の歯に加わる力を弱め、歯車の歯の摩耗の速度を
遅くすることができ、また歯車の歯が欠けたりする事故
を防止できるインバータ装置の制御回路を得ることを目
的とする。This invention was made to solve the above-mentioned problems, and when switching the acceleration/deceleration pattern of the inverter device from a stopped state to accelerated operation or from constant speed operation to deceleration operation, after switching, By stopping the change in output frequency for a certain period of time after a certain frequency change, the force applied to the teeth of the gear used to connect the induction motor and the load device is reduced, and the rate of wear of the gear teeth is reduced. An object of the present invention is to provide a control circuit for an inverter device that can slow down the speed and prevent accidents such as gear teeth being chipped.
［課題を解決するための手段］
この発明に係るインバータ装置の制御回路は、目標周波
数を設定する目標周波数設定回路と、目標周波数と現在
出力中の実出力周波数指令よりインバータ装置の運転モ
ードを決定するとともに、この運転モードとインバータ
装置の加減速時間から次に出力する周波数指令を計算し
、出力する出力周波数決定回路と、次に出力する周波数
例があらかじめ設定された停止周波数になると同時に計
数を開始し、あらかじめ設定された停止時間の間だけ計
数を続けるとともに、この計数動作を継続中は出力周波
数停止信号を出力し続ける出力周波数停止信号出力回路
と、常時は出力周波数指令をそのまま出力し、出力周波
数停止信号が入力されると同時にそのときの出力周波数
決定回路からの次に出力する周波数指令を保持するとと
もに、出力周波数停止信号が入力されている間は保持し
続けて実出力周波数指令として出力する出力周波数停止
回路とを備えたものである。[Means for Solving the Problems] A control circuit for an inverter device according to the present invention includes a target frequency setting circuit that sets a target frequency, and determines an operation mode of the inverter device from the target frequency and an actual output frequency command currently being output. At the same time, the frequency command to be outputted next is calculated from this operation mode and the acceleration/deceleration time of the inverter device, and the output frequency determining circuit to be outputted and the next frequency example to be outputted are counted at the same time as the preset stop frequency. An output frequency stop signal output circuit that starts counting and continues counting only for a preset stop time, and continues to output an output frequency stop signal while this counting operation continues, and an output frequency stop signal output circuit that always outputs the output frequency command as is. As soon as the output frequency stop signal is input, the next frequency command to be output from the output frequency determining circuit at that time is held, and while the output frequency stop signal is input, it is held as the actual output frequency command. and an output frequency stop circuit.
［作用］
この発明においては、出力周波数停止信号出力回路が、
出力周波数指令があらかじめ設定された停止周波数にな
ると同時に計数を開始し、あらかじめ設定された停止時
間の間だけ計数を続け、この計数動作中は出力周波数停
止信号を出力する。[Function] In this invention, the output frequency stop signal output circuit has the following features:
Counting starts as soon as the output frequency command reaches a preset stop frequency, continues counting for a preset stop time, and outputs an output frequency stop signal during this counting operation.
また、出力周波数停止回路は、この出力周波数停止信号
が入力されている間は出力周波数決定回路からの出力周
波数指令を保持し続ける。Further, the output frequency stop circuit continues to hold the output frequency command from the output frequency determining circuit while this output frequency stop signal is input.
Ｅ実施例］ 以下、この発明の一実施例について説明する。E example] An embodiment of the present invention will be described below.
第１図において、第３図及び第５図と同一部分には同一
符号を付し、その説明は省略する。（１ｏ）は出力周波
数停止信号出力回路で、出力周波数決定回路（７）から
の出力周波数指令があらかじめ設定された停止周波数に
なると同時に計数を開始し、あらかじめ設定された停止
時間の間だけ計数を続けるとともに、この計数動作を継
続中は出力周波数停止信号を出力し続ける回路である。In FIG. 1, the same parts as in FIGS. 3 and 5 are given the same reference numerals, and their explanations will be omitted. (1o) is an output frequency stop signal output circuit that starts counting as soon as the output frequency command from the output frequency determining circuit (7) reaches a preset stop frequency, and continues counting only during the preset stop time. This circuit also continues to output an output frequency stop signal while this counting operation continues.
なお、ここで停止周波数とは、停止状態から加速運転に
、あるいは定速運転から減速運転への運転モードの切り
換え後、あらかじめ設定された周波数Δｆだけ出力周波
数指令が変化したときの周波数で、出力周波数指令の変
化を停止させるという意味で停止周波数と称し、また停
止時間とは、出力周波数指令の変化を停止させている時
間Δｔをいい、あらかじめ設定しておくものである。Note that the stop frequency here is the frequency when the output frequency command changes by a preset frequency Δf after switching the operation mode from a stopped state to acceleration operation or from constant speed operation to deceleration operation, and is the frequency at which the output frequency command changes by a preset frequency Δf. It is called a stop frequency in the sense that the change in the frequency command is stopped, and the stop time refers to the time Δt during which the change in the output frequency command is stopped, and is set in advance.
この出力周波数停止信号出力回路（１０）についてさら
に詳しく説明すると、この回路はΔｆ判断回路（１０１
）とタイマー回路（１０２）を有し、出力周波数決定回
路（γ）からの出力周波数指令を入力し、Δｆ判断回路
（１０１）が、出力周波数指令の変化の状況により、例
えば周波数の変化がなければ停止または定速モードであ
り、周波数が高い方へ変化すれば加速モードであり、逆
方向へ変化すれば減速モードであるので、これらの変化
の状況に基づいて運転モードが切り換わったことを判断
し、さらにこの切り換え後、出力周波数指令が一定の周
波数Δｆだけ変化して停止周波数になったことを判断し
て信号を出力する。タイマー回路（１０２）は、Δｆ判
断回路からの出力信号が入力されると同時に計数を開始
し、一定の時間Δｔの間だけ計数を続けるとともに、こ
の計数動作を継続中は出力周波数停止信号を出力し続け
る。To explain this output frequency stop signal output circuit (10) in more detail, this circuit is a Δf judgment circuit (101).
) and a timer circuit (102), which inputs the output frequency command from the output frequency determination circuit (γ), and determines, for example, if there is no change in frequency, depending on the state of change in the output frequency command. If the frequency changes to a higher direction, it is in acceleration mode; if it changes in the opposite direction, it is in deceleration mode. Based on these changes, it is possible to know that the operating mode has switched. After this switching, it is determined that the output frequency command has changed by a certain frequency Δf and has reached the stop frequency, and a signal is output. The timer circuit (102) starts counting at the same time as the output signal from the Δf judgment circuit is input, continues counting for a certain time Δt, and outputs an output frequency stop signal while continuing this counting operation. Continue to do so.
（１１）は出力周波数停止回路で、常時は出力周波数指
令をそのまま出力し、出力周波数停止信号出力回路（１
０）からの出力周波数停止信号が入力されると同時にそ
のときの出力周波数決定回路（７）からの出力周波数指
令を保持するとともに、出力周波数停止信号が入力され
ている間は保持し続けて、実出力周波数指令として出力
する回路である。(11) is the output frequency stop circuit, which normally outputs the output frequency command as is, and the output frequency stop signal output circuit (1
At the same time as the output frequency stop signal from 0) is input, the output frequency command from the output frequency determining circuit (7) at that time is held, and while the output frequency stop signal is input, the output frequency command is held. This is a circuit that outputs as an actual output frequency command.
次に、動作について説明する。出力周波数停止信号出力
回路（１０）は出力周波数決定回路（７）がらの出力周
波数指令があらかじめ設定された停止周波数になると同
時に計数を開始し、あらがしめ設定された停止時間の間
だけ計数を続けるとともに、この計数動作を継続中は出
力周波数停止信号を出力し続ける。また、出力周波数停
止回路（１１）は出力周波数停止信号が入力されると同
時にそのときの出力周波数決定回路（７）からの゛出力
周波数指令を保持するとともに、出力周波数停止信号が
入力されている間はこれを保持し続ける。Next, the operation will be explained. The output frequency stop signal output circuit (10) starts counting as soon as the output frequency command from the output frequency determining circuit (7) reaches a preset stop frequency, and continues counting only during the preset stop time. At the same time, the output frequency stop signal continues to be output while this counting operation continues. Further, the output frequency stop circuit (11) holds the output frequency command from the output frequency determining circuit (7) at the same time as the output frequency stop signal is input, and the output frequency stop signal is input. Continue to hold this for a while.
従って、この発明のインバータ装置の制御回路による加
減速パターンは、第２図に示すようなものになる。すな
わち、停止状態から加速運転に、あるいは定速運転から
減速運転に切り換える際に、切り換え後、あらかじめ設
定した一定の周波数Δｆの変化後にあらかじめ設定した
一定時間Δｔの間、出力周波数の変化が停止する。この
ΔｆとΔｔの設定値を調節することにより、誘導電動機
と負荷装置の接続に使用される歯車の歯に加わる力を弱
め、歯車の歯の摩耗の速度を遅くすることができる。ま
た、歯車の歯が欠けたりする事故を防ぐことができる。Therefore, the acceleration/deceleration pattern by the control circuit of the inverter device of the present invention is as shown in FIG. That is, when switching from a stopped state to accelerated operation or from constant speed operation to deceleration operation, after the change, the change in the output frequency stops for a preset constant time Δt after the preset constant frequency Δf changes. . By adjusting the set values of Δf and Δt, it is possible to weaken the force applied to the gear teeth used to connect the induction motor and the load device, and to slow down the rate of wear of the gear teeth. In addition, accidents such as gear teeth being chipped can be prevented.
また、歯車どうしが強い力で当るとその瞬間インバータ
に対する負荷が非常に大きくなり、過大な電流が流れ、
インバータがトリップすることがあるが、これを防ぐこ
ともてきる。Also, if the gears hit each other with a strong force, the load on the inverter becomes extremely large at that moment, causing an excessive current to flow.
The inverter may trip, but this can be prevented.
なお、Δｆはバックラッシュ分だけ一方の歯車が移動し
て歯と歯が当るのに相当する周波数変化に設定し、Δｔ
は歯と歯が当ったときの振動が減衰する迄の時間を設定
することにより上述の効果を得ることができる。Note that Δf is set to a frequency change that corresponds to one gear moving by the amount of backlash and the teeth touching each other, and Δt
The above-mentioned effect can be obtained by setting the time until the vibration attenuates when the teeth contact each other.
次に、上記実施例（第１図）は三相のインバータを示し
ているが、単相インバータであっても同様の効果が得ら
れる。また、ＰＷＭインバータに限らず負荷に電動機が
接続されたインバータであれば、例えばＰＡＭ （パル
ス振幅変調）インバータに実施しても同様の効果が得ら
れる。Next, although the above embodiment (FIG. 1) shows a three-phase inverter, the same effect can be obtained even with a single-phase inverter. Moreover, the same effect can be obtained not only in a PWM inverter but also in any inverter in which a motor is connected to the load, such as a PAM (Pulse Amplitude Modulation) inverter.
［発明の効果］
この発明は以上説明したとおり、加減速パターンを、イ
ンバータ装置の運転モードが停止状態がら加減速運転に
、あるいは定速運転がら減速運転に切り換える際に、切
り換え後、ある一定の周波数の変化後にある一定時間の
間、出力周波数の変化か停止するように構成したので、
誘導電動機と負荷装置の接続に使用される歯車の歯に加
わるカを弱め、歯車の歯の摩耗の速度を遅くすることが
できる。また、歯車の歯が欠けたりする事故を防ぐこと
のできるインバ〜り装置の制御回路から得られる効果が
ある。[Effects of the Invention] As explained above, the present invention changes the acceleration/deceleration pattern to a certain level after switching the operation mode of the inverter device from a stopped state to acceleration/deceleration operation or from constant speed operation to deceleration operation. I configured the output frequency to change or stop for a certain period of time after the frequency changes, so
It is possible to reduce the force applied to the teeth of the gear used to connect the induction motor and the load device, and slow down the rate of wear of the gear teeth. Further, there is an effect obtained from the control circuit of the inverter, which can prevent accidents such as gear teeth being chipped.
第１図はこの発明の一実施例によるインバータ装置の制
御回路の回路構成図、第２図は第１図に示すこの発明の
インバータ装置の制御回路による加減速パターンを示す
線図、第３図は従来のインバータ装置の制御回路の回路
構成図、第４図は第３図に示す従来のインバータ装置の
制御回路による加減速パターンを示す線図、第５図は他
の従来のインバータ装置の制御回路の回路構成図、第６
図は第５図に示す他の従来のインバータ装置の制御回路
による加減速パターンを示す線図である。
図において、（１〉は順変換部、（２）は平滑コンデン
サ、（３）は逆変換部、（４）は誘導電動機、（５）は
目標周波数設定回路、（６）は加減速時間設定回路、（
７）は出力周波数決定回路、（８）はＰＷＭ信号作成回
路、（９）は駆動回路、（１０）は出力周波数停止信号
出力回路、（１１）は出力周波数停止回路。
なお、図中、同一符号は同一
を示す。
または相当部分FIG. 1 is a circuit configuration diagram of a control circuit of an inverter device according to an embodiment of the present invention, FIG. 2 is a diagram showing an acceleration/deceleration pattern by the control circuit of the inverter device of the present invention shown in FIG. 1, and FIG. is a circuit configuration diagram of a control circuit of a conventional inverter device, FIG. 4 is a diagram showing acceleration/deceleration patterns by the control circuit of the conventional inverter device shown in FIG. 3, and FIG. 5 is a diagram showing control of another conventional inverter device Circuit configuration diagram of the circuit, No. 6
This figure is a diagram showing an acceleration/deceleration pattern by a control circuit of another conventional inverter device shown in FIG. In the figure, (1> is the forward conversion unit, (2) is the smoothing capacitor, (3) is the inverse conversion unit, (4) is the induction motor, (5) is the target frequency setting circuit, and (6) is the acceleration/deceleration time setting. circuit,(
7) is an output frequency determination circuit, (8) is a PWM signal generation circuit, (9) is a drive circuit, (10) is an output frequency stop signal output circuit, and (11) is an output frequency stop circuit. In addition, in the figures, the same reference numerals indicate the same. or a substantial portion
Claims (1)
るインバータ装置の目標周波数を設定する目標周波数設
定回路と、前記目標周波数と現在出力中の実出力周波数
指令よりインバータ装置の運転モードを決定するととも
に、この運転モードとインバータ装置の加減速時間から
次に出力する周波数指令を計算し、出力する出力周波数
決定回路と、前記の次に出力する周波数指令があらかじ
め設定された停止周波数になると同時に計数を開始し、
あらかじめ設定された停止時間の間だけ計数を続けると
ともに、この計数動作を継続中は出力周波数停止信号を
出力し続ける出力周波数停止信号出力回路と、常時は出
力周波数指令をそのまま出力し、前記出力周波数停止信
号が入力されると同時にそのときの出力周波数決定回路
からの次に出力する周波数指令を保持するとともに、出
力周波数停止信号が入力されている間は保持して実出力
周波数指令として出力する出力周波数停止回路を備えた
インバータ装置の制御回路。A target frequency setting circuit that sets a target frequency of an inverter device that converts alternating current power into variable frequency, variable voltage alternating current power; and a target frequency setting circuit that determines an operation mode of the inverter device from the target frequency and an actual output frequency command currently being output. , an output frequency determining circuit that calculates and outputs the next frequency command from this operation mode and acceleration/deceleration time of the inverter device, and performs counting at the same time that the next frequency command reaches the preset stop frequency. start,
An output frequency stop signal output circuit that continues counting only during a preset stop time and continues to output an output frequency stop signal while this counting operation continues; An output that holds the next frequency command to be output from the output frequency determining circuit at the same time as the stop signal is input, and holds it while the output frequency stop signal is input and outputs it as the actual output frequency command. A control circuit for an inverter device equipped with a frequency stop circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2061286A JP2628094B2 (en) | 1990-03-14 | 1990-03-14 | Inverter control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2061286A JP2628094B2 (en) | 1990-03-14 | 1990-03-14 | Inverter control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03265494A true JPH03265494A (en) | 1991-11-26 |
| JP2628094B2 JP2628094B2 (en) | 1997-07-09 |
Family
ID=13166805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2061286A Expired - Lifetime JP2628094B2 (en) | 1990-03-14 | 1990-03-14 | Inverter control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2628094B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004215407A (en) * | 2002-12-28 | 2004-07-29 | Daikin Ind Ltd | Three-phase pam load drive system |
| JP2004242440A (en) * | 2003-02-06 | 2004-08-26 | Fuji Electric Fa Components & Systems Co Ltd | Control method for motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS631390A (en) * | 1986-05-28 | 1988-01-06 | San Marine:Kk | Method for feeding speed or acceleration command in speed control |
-
1990
- 1990-03-14 JP JP2061286A patent/JP2628094B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS631390A (en) * | 1986-05-28 | 1988-01-06 | San Marine:Kk | Method for feeding speed or acceleration command in speed control |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004215407A (en) * | 2002-12-28 | 2004-07-29 | Daikin Ind Ltd | Three-phase pam load drive system |
| JP2004242440A (en) * | 2003-02-06 | 2004-08-26 | Fuji Electric Fa Components & Systems Co Ltd | Control method for motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2628094B2 (en) | 1997-07-09 |
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