JPH06311787A - Inverter - Google Patents
InverterInfo
- Publication number
- JPH06311787A JPH06311787A JP5097992A JP9799293A JPH06311787A JP H06311787 A JPH06311787 A JP H06311787A JP 5097992 A JP5097992 A JP 5097992A JP 9799293 A JP9799293 A JP 9799293A JP H06311787 A JPH06311787 A JP H06311787A
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- JP
- Japan
- Prior art keywords
- voltage
- output
- power supply
- rated
- ratio
- 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.)
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- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、V/F制御を行うイン
バータ装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device for V / F control.
【0002】[0002]
【従来の技術】従来、オープンループのPWM方式を用
いてV/F制御を行うインバータ装置は、最大周波数f
maxで最大電圧Vmax(入力電圧で一義的に決まる
電圧)出力とし、それ以下の出力周波数f0 では最大周
波数fmaxと最大電圧Vmaxとで決まるV/F比率
に従って出力電圧V0 の制御を行っている。2. Description of the Related Art Conventionally, an inverter device which performs V / F control using an open loop PWM system has a maximum frequency f.
The maximum voltage Vmax (a voltage that is uniquely determined by the input voltage) is output at max, and the output voltage V 0 is controlled according to the V / F ratio determined by the maximum frequency fmax and the maximum voltage Vmax at the output frequency f 0 below that. There is.
【0003】[0003]
【発明が解決しようとする課題】上述のような従来例装
置では使用誘導電動機の定格電圧と、実際にインバータ
装置に入力電源として接続する交流電源電圧とが一致し
ない場合、図7に示すように交流電源電圧の方が定格電
圧より高いと、同一出力周波数f0 での出力電圧V0 が
定格の場合に比べての如く高くなり、そのため過電
流異常を起こし、保護回路が働くことにより動作が停止
したり、逆に交流電源電圧の方が定格電圧より低いと、
出力電圧V0 が定格の場合に比べての如く低くな
り、誘導電動機にトルク不足が生じたりしていた。また
電源電圧変動がある場合にも同様な現象が起きるという
問題があった。When the rated voltage of the induction motor used and the AC power supply voltage actually connected to the inverter device as the input power supply do not match in the conventional device as described above, as shown in FIG. when towards the AC power supply voltage is higher than the rated voltage, the same output frequency f becomes higher as compared with the case of the output voltage V 0 is rated at 0, therefore cause overcurrent abnormality, the operation by acting protection circuit is If it stops, or conversely the AC power supply voltage is lower than the rated voltage,
The output voltage V 0 is as low as that in the case of the rating, and the induction motor is deficient in torque. Further, there is a problem that a similar phenomenon occurs even when the power supply voltage changes.
【0004】本発明は上記の問題点に鑑みて為されたも
ので、その目的とするところは入力電源電圧が定格電圧
と異なっても、定められたV/F比率の変換交流出力が
得られ、誘導電動機を安定に動作させることができるイ
ンバータ装置を提供するにある。The present invention has been made in view of the above problems, and an object thereof is to obtain a converted AC output having a predetermined V / F ratio even when the input power supply voltage is different from the rated voltage. An object of the present invention is to provide an inverter device capable of stably operating an induction motor.
【0005】[0005]
【課題を解決するための手段】請求項1の発明では、3
相の交流電源を整流平滑した直流をV/F制御によって
交流に変換し、この変換交流出力を誘導電動機に供給す
るインバータ装置において、前記交流電源の電圧を検出
する電源電圧検出回路と、この電源電圧検出回路の検出
電圧に応じて前記変換交流出力を予め定めたV/F比率
となるように制御する制御部とを備えたものである。According to the invention of claim 1, 3
A power supply voltage detection circuit that detects the voltage of the AC power supply in an inverter device that converts direct current obtained by rectifying and smoothing a phase AC power supply into AC by V / F control and supplies the converted AC output to an induction motor, and the power supply. The control unit controls the converted AC output to have a predetermined V / F ratio according to the detection voltage of the voltage detection circuit.
【0006】請求項2の発明では、請求項1の発明にお
いて、前記電源電圧検出回路の検出電圧に応じ、予め定
めたV/F比率に基づいて前記変換交流出力の電圧を補
正するものである。請求項3の発明では、請求項1の発
明において、前記電源電圧検出回路の検出電圧に応じ、
予め定めたV/F比率に基づいて前記変換交流出力の周
波数を補正するものである。According to a second aspect of the invention, in the first aspect of the invention, the voltage of the converted AC output is corrected based on a predetermined V / F ratio according to the detection voltage of the power supply voltage detection circuit. . According to the invention of claim 3, in the invention of claim 1, according to the detection voltage of the power supply voltage detection circuit,
The frequency of the converted AC output is corrected based on a predetermined V / F ratio.
【0007】請求項4の発明では、請求項1の発明にお
いて、前記電源電圧検出回路は、前記直流を電源として
動作し、安定化した出力を制御部に電源として供給する
DC−DCコンバータの非安定化出力の電圧より前記交
流電源電圧を検出するものである。According to a fourth aspect of the present invention, in the first aspect of the present invention, the power supply voltage detection circuit operates by using the direct current as a power supply and supplies a stabilized output to the control unit as a power supply. The AC power supply voltage is detected from the voltage of the stabilized output.
【0008】[0008]
【作用】請求項1の発明によれば、入力電源である交流
電源電圧が定格電圧より外れても変換交流出力を予め定
めV/F比率に沿って補正することができ、そのため負
荷である誘導電動機を安定に動作させることができる。
請求項2の発明によれば、入力電源である交流電源電圧
が定格電圧より外れても変換交流出力の電圧をV/F比
率に基づいた電圧に補正するため、過大電流異常やトル
ク不足等のトラブルを回避することができる。According to the first aspect of the present invention, even if the AC power source voltage as the input power source deviates from the rated voltage, the converted AC output can be corrected in accordance with a predetermined V / F ratio, and therefore, the induction as a load. The electric motor can be operated stably.
According to the second aspect of the present invention, even if the AC power source voltage as the input power source deviates from the rated voltage, the voltage of the converted AC output is corrected to a voltage based on the V / F ratio. Trouble can be avoided.
【0009】請求項3の発明によれば、入力電源である
交流電源電圧が定格電圧より外れても変換交流出力の周
波数をV/F比率に基づいた周波数に補正するため、誘
導電動機のトルク補償が行える。請求項4の発明によれ
ば、コストが高く大型となるようなACトランスを用い
る必要がなく、また欠相時のトラブルも無く、確実に交
流電源電圧を交流電源と絶縁した形で電源電圧を検出す
ることができる。According to the invention of claim 3, since the frequency of the converted AC output is corrected to the frequency based on the V / F ratio even if the AC power supply voltage as the input power supply deviates from the rated voltage, the torque compensation of the induction motor is performed. Can be done. According to the invention of claim 4, there is no need to use an AC transformer that is costly and large in size, and there is no trouble at the time of phase loss, and the AC power supply voltage is reliably insulated from the AC power supply. Can be detected.
【0010】[0010]
【実施例】以下、本発明の実施例を図面を参照して説明
する。 (実施例1)図1は本実施例の回路を示しており、三相
の交流電源ACを整流回路1で整流して平滑コンデンサ
C1 で平滑し、この平滑で得られた直流を三対のスイッ
チング素子をブッリジ接続した出力回路2により所定周
波数の交流に変換し、この変換交流出力を誘導電動機M
に供給するようになっている。制御部4は出力回路2の
スイッチング素子をドライバ3を通じてPWM方式によ
り駆動させるためのもので、周波数設定部5によって設
定された周波数に対して加速もしくは減速する際に所定
時間で到達させるように加速若しくは減速に制限を加え
る加速減速制限回路41と、この加速減速制限回路41
からの信号を受け、出力周波数f0 が設定周波数に到達
した時の出力電圧V0 が所定のV/F比率の電圧となる
ように出力電圧V0 を決める電圧制御信号Vと、出力周
波数f0 を決める周波数制御信号Fとを出力するV/F
変換器42と、このV/F変換器42からの電圧制御信
号Vを受けて出力電圧V0 を決める電圧制御回路43
と、周波数制御信号Fを受けて出力周波数f0 を決める
周波数制御回路44と、これら周波数制御回路44と、
電圧制御回路43の信号を受けて所定の出力周波数f0
で且つ所定の出力電圧V0 の交流出力が得られるPWM
信号を作成するPWM信号合成回路45と、外部の電源
電圧検出回路6の検出信号を受けて周波数制御信号Fを
補正する補正回路46とを備えている。Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 shows a circuit of this embodiment, in which a three-phase AC power supply AC is rectified by a rectifier circuit 1 and smoothed by a smoothing capacitor C 1 , and three DCs obtained by this smoothing are paired. The output circuit 2 in which the switching elements of the above are connected in a bridge form is converted into an alternating current of a predetermined frequency, and this converted alternating current output is converted into an induction motor M.
It is designed to be supplied to. The control unit 4 is for driving the switching element of the output circuit 2 by the PWM method through the driver 3, and accelerates so as to reach the frequency set by the frequency setting unit 5 in a predetermined time when accelerating or decelerating. Alternatively, the acceleration / deceleration limiting circuit 41 for limiting the deceleration and the acceleration / deceleration limiting circuit 41
Receiving a signal from the output voltage V 0 is a voltage control signal V which determines the output voltage V 0 so that the voltage of the predetermined V / F ratio when the output frequency f 0 reaches the set frequency, the output frequency f V / F that outputs a frequency control signal F that determines 0
A converter 42 and a voltage control circuit 43 that receives the voltage control signal V from the V / F converter 42 and determines an output voltage V 0.
A frequency control circuit 44 that receives the frequency control signal F to determine the output frequency f 0 , and these frequency control circuits 44,
Upon receiving the signal from the voltage control circuit 43, a predetermined output frequency f 0
PWM with which an AC output of a predetermined output voltage V 0 can be obtained
A PWM signal synthesizing circuit 45 for creating a signal and a correction circuit 46 for receiving the detection signal of the external power supply voltage detection circuit 6 and correcting the frequency control signal F are provided.
【0011】電源電圧検出回路6は、上記出力回路2に
供給する直流電圧から交流電源ACの電圧を検出するも
のであり、電圧検出入力端を平滑コンデンサC1 の両端
に接続してある。具体的には図2に示すように制御部4
に制御動作のための電源を供給するDC−DCコンバー
タ7の出力側に設けてあるレギュレータ8の入力側、つ
まり交流電源ACの電圧に比例する非安定化出力の負電
圧を取り込んで、定格電圧に対応して設定した基準電圧
との差電圧±ΔVを検出し、この差電圧±ΔVを上記周
波数制御信号Fの補正値として補正回路46へ出力する
ようになっている。The power supply voltage detection circuit 6 detects the voltage of the AC power supply AC from the DC voltage supplied to the output circuit 2, and its voltage detection input terminal is connected to both ends of the smoothing capacitor C 1 . Specifically, as shown in FIG.
To the input side of the regulator 8 provided on the output side of the DC-DC converter 7 that supplies power for control operation, that is, the negative voltage of the unstabilized output proportional to the voltage of the AC power supply AC The difference voltage ± ΔV with respect to the reference voltage set corresponding to is detected, and this difference voltage ± ΔV is output to the correction circuit 46 as the correction value of the frequency control signal F.
【0012】DCーDCコンバータ7は平滑コンデンサ
C1 で平滑されて得られた直流を電源として動作するリ
ンギングチョークコンバータからなり、発振トランスT
の帰還巻線n3 の出力をドライバ7aを通じてスイッチ
ングトランジタQのベースに与えてオンオフさせ、この
オンオフによって発振トランスTの2次巻線n2 側に1
次巻線n1 との巻線比に対応した高周波電圧を発生さ
せ、この電圧を整流平滑して直流に戻すものであり、こ
の直流は更にレギュレータ8で図3に示す電圧V 1 に安
定化され、この安定化した直流を制御部4に動作電源と
して供給するようになっている。また電源電圧検出回路
6に入力する電圧は2次出力を整流平滑しただけの電圧
であるため、入力電源、つまり交流電源ACの電圧Vs
に比例する電圧V2 となる。The DC-DC converter 7 is a smoothing capacitor.
C1DC power source smoothed by
Oscillation transformer T
Feedback winding n3Switch output through driver 7a
This is given to the base of Ng Transiter Q and turned on and off.
The secondary winding n of the oscillation transformer T is turned on and off.2One on the side
Next winding n1A high frequency voltage corresponding to the winding ratio of
This voltage is rectified and smoothed to return to direct current.
Of the DC voltage of the regulator 8 as shown in FIG. 1Cheap
This stabilized direct current is supplied to the control unit 4 as an operating power source.
And then supply it. In addition, the power supply voltage detection circuit
The voltage input to 6 is the voltage that is obtained by rectifying and smoothing the secondary output.
Therefore, the voltage Vs of the input power supply, that is, the AC power supply AC
Voltage V proportional to2Becomes
【0013】而して交流電源ACの電圧Vsが定格電圧
に対して低い場合には、電源電圧検出回路6で検出され
る差電圧ΔVは−側になり、この差電圧ΔVに応じて制
御部4の補正回路46は定格時のV/F比率で定めてあ
る出力電圧V0 に見合った出力周波数f0 となるように
周波数制御信号Fを補正する。つまり電源電圧Vsが低
い場合には図4(a)に示すように同一出力周波数f0
に対する出力電圧V0は定格時の場合に比べての如
く低くなっていたが、本実施例では電源電圧検出回路6
の検出出力ΔVに応じて制御部4の補正回路46が定格
のV/F比率となる出力周波数f0 を得るために周波数
制御信号Fを補正するのである。その結果定格の場合
のV/F比率に沿った出力電圧V0 と出力周波数f0 が
得られることになり、トルク不足が回避できる。When the voltage Vs of the AC power supply AC is lower than the rated voltage, the difference voltage ΔV detected by the power supply voltage detection circuit 6 is on the negative side, and the control unit is in accordance with this difference voltage ΔV. The correction circuit 46 of No. 4 corrects the frequency control signal F so that the output frequency f 0 corresponds to the output voltage V 0 determined by the rated V / F ratio. That same output frequency f 0 as when the power supply voltage Vs is low shown in FIG. 4 (a)
The output voltage V 0 is was low as compared with the case at the rated for a power supply voltage detection circuit in the present embodiment 6
The correction circuit 46 of the control unit 4 corrects the frequency control signal F in order to obtain the output frequency f 0 that provides the rated V / F ratio in accordance with the detected output ΔV. As a result, the output voltage V 0 and the output frequency f 0 according to the V / F ratio in the rated case can be obtained, and the torque shortage can be avoided.
【0014】一方交流電源ACの電圧Vsが定格電圧に
対して高い場合には、電源電圧検出回路6で検出される
差電圧ΔVは+側になり、この差電圧ΔVに応じて制御
部4の補正回路46は定格時のV/F比率で定められて
ある出力電圧V0 に見合った出力周波数f0 となるよう
に周波数制御信号Fを補正する。その結果電源電圧Vs
が高い場合には図4(b)に示すように同一出力周波数
f0 に対する出力電圧V0 は定格時の場合に対して、
従来ではの如く高くなっていたが、本実施例では電源
電圧検出回路6の検出出力ΔVに応じて制御部4の補正
回路46が定格の場合のV/F比率となるように周波
数制御信号Fを補正するのである。従って出力周波数f
0 に対して出力電圧V0 が定格のV/F比率で決まる電
圧以上とならず、そのため過電流異常によるトラブルが
回避できる。On the other hand, when the voltage Vs of the AC power supply AC is higher than the rated voltage, the difference voltage ΔV detected by the power supply voltage detection circuit 6 is on the + side, and the control section 4 of the control unit 4 responds to this difference voltage ΔV. The correction circuit 46 corrects the frequency control signal F so that the output frequency f 0 corresponds to the output voltage V 0 determined by the rated V / F ratio. As a result, the power supply voltage Vs
4 is high, the output voltage V 0 with respect to the same output frequency f 0 is as shown in FIG.
Although it is as high as in the conventional case, in the present embodiment, the frequency control signal F is set so that the correction circuit 46 of the control unit 4 has the V / F ratio in the case of the rating according to the detection output ΔV of the power supply voltage detection circuit 6. Is corrected. Therefore, the output frequency f
With respect to 0 , the output voltage V 0 does not exceed the voltage determined by the rated V / F ratio, so that trouble due to overcurrent abnormality can be avoided.
【0015】(実施例2)上記実施例1は電源電圧Vs
が定格電圧に対して変動した場合、出力周波数f 0 を定
格のV/F比率となるように補正を行うものであるが、
本実施例は出力電圧V0 を定格のV/F比率となるよう
に補正を行うものである。図5は本実施例の回路構成を
示しており、電源電圧検出回路6の検出出力ΔVに応じ
て補正回路46は電圧制御回路43にV/F変換器42
から与えられる電圧制御信号Vを補正するようになって
いる。電源電圧検出回路6の構成は実施例1と同様な構
成を用いる。(Embodiment 2) The above-mentioned Embodiment 1 has a power supply voltage Vs.
Output voltage f 0Set
The correction is performed so that the V / F ratio is as high as possible.
In this embodiment, the output voltage V0To be the rated V / F ratio
The correction is made to. FIG. 5 shows the circuit configuration of this embodiment.
It is shown according to the detection output ΔV of the power supply voltage detection circuit 6.
The correction circuit 46 includes a voltage control circuit 43 and a V / F converter 42.
The voltage control signal V given by
There is. The configuration of the power supply voltage detection circuit 6 is similar to that of the first embodiment.
Use
【0016】而して交流電源ACの電圧Vsが定格電圧
に対して低い場合には、電源電圧検出回路6で検出され
る差電圧ΔVは−側になり、この差電圧ΔVに応じて制
御部4の補正回路46は定格時のV/F比率で定められ
てある出力周波数f0 に見合った出力電圧V0 となるよ
うに電圧制御信号Vを補正する。つまり電源電圧Vsが
低い場合には図6(a)に示すように同一出力電圧V0
に対する出力周波数f 0 は定格の場合に対して、従来
ではの如く高くなっていたが、本実施例では電源電圧
検出回路6の検出出力ΔVに応じて定格のV/F比率と
なる出力電圧V 0 を得るために電圧制御信号Vを補正す
るのである。Thus, the voltage Vs of the AC power supply AC is the rated voltage
If it is lower than, it is detected by the power supply voltage detection circuit 6.
The differential voltage ΔV becomes negative and the voltage is controlled in accordance with this differential voltage ΔV.
The correction circuit 46 of the control unit 4 is determined by the V / F ratio at the time of rating.
Output frequency f0Output voltage V0Will be
The voltage control signal V is corrected as described above. That is, the power supply voltage Vs
When it is low, the same output voltage V as shown in FIG.0
Output frequency f 0Is the conventional case compared to the rated case
However, in this embodiment, the power supply voltage
According to the detection output ΔV of the detection circuit 6, the rated V / F ratio and
Output voltage V 0The voltage control signal V to obtain
It is.
【0017】一方交流電源ACの電圧Vsが定格電圧に
対して高い場合には、電源電圧検出回路6で検出される
差電圧ΔVは+側になり、この差電圧ΔVに応じて制御
部4の補正回路46は定格時のV/F比率で定められて
ある出力周波数f0 に見合った出力電圧V0 となるよう
に電圧制御信号Vを補正する。つまり電源電圧Vsが高
い場合には図4(b)に示すように同一出力電圧V0 に
対する出力周波数f0は定格の場合に対して、従来で
はの如く高くなっていたが、本実施例では制御部4の
補正回路46が電源電圧検出回路6の検出出力ΔVに応
じて定格のV/F比率となる出力電圧V0 を得るために
電圧制御信号Vを補正するのである。On the other hand, when the voltage Vs of the AC power supply AC is higher than the rated voltage, the difference voltage ΔV detected by the power supply voltage detection circuit 6 is on the + side, and the control section 4 of the controller 4 responds to this difference voltage ΔV. The correction circuit 46 corrects the voltage control signal V so that the output voltage V 0 corresponds to the output frequency f 0 defined by the rated V / F ratio. That is, when the power supply voltage Vs is high, as shown in FIG. 4B, the output frequency f 0 for the same output voltage V 0 is higher as in the conventional case as compared with the rated value , but in the present embodiment, The correction circuit 46 of the control unit 4 corrects the voltage control signal V in order to obtain the output voltage V 0 which becomes the rated V / F ratio according to the detection output ΔV of the power supply voltage detection circuit 6.
【0018】このようにして本実施例では定格に対応し
たV/F比率の出力周波数f0 と出力電圧V0 とが得ら
れるので、一定トルクが得られ、トルク補償ができるの
である。In this way, in this embodiment, the output frequency f 0 and the output voltage V 0 having the V / F ratio corresponding to the rating can be obtained, so that a constant torque can be obtained and the torque can be compensated.
【0019】[0019]
【発明の効果】請求項1の発明は、交流電源を整流平滑
した直流をV/F制御によって交流に変換し、この変換
交流出力を誘導電動機に供給するインバータ装置におい
て、前記交流電源の電圧を検出する電源電圧検出回路
と、この電源電圧検出回路の検出電圧に応じて前記変換
交流出力を予め定めたV/F比率となるように制御する
制御部とを備えたので、入力電源である交流電源電圧が
定格電圧より外れても変換交流出力を予め定めたV/F
比率に沿って補正することができ、その結果負荷である
誘導電動機を安定に動作させることができるという効果
がある。According to the first aspect of the present invention, in the inverter device for converting the direct current obtained by rectifying and smoothing the alternating current power source into the alternating current by the V / F control and supplying the converted alternating current output to the induction motor, the voltage of the alternating current power source is changed. Since the power supply voltage detection circuit for detection and the control unit for controlling the converted AC output to have a predetermined V / F ratio in accordance with the detection voltage of the power supply voltage detection circuit are provided, an AC power supply that is an input power supply is provided. Even if the power supply voltage deviates from the rated voltage, the converted AC output is a predetermined V / F
It is possible to perform correction according to the ratio, and as a result, it is possible to stably operate the induction motor that is a load.
【0020】特に請求項2の発明は、前記電源電圧検出
回路の検出電圧に応じ、予め定めたV/F比率に基づい
て前記変換交流出力の電圧を補正するので、入力電源で
ある交流電源電圧が定格電圧より外れても変換交流出力
の電圧をV/F比率に基づいた電圧に補正するため、過
大電流異常やトルク不足等のトラブルを回避することが
できるという効果がある。According to a second aspect of the present invention, the voltage of the converted AC output is corrected based on a predetermined V / F ratio according to the detection voltage of the power supply voltage detection circuit. Since the voltage of the converted AC output is corrected to a voltage based on the V / F ratio even when the voltage deviates from the rated voltage, it is possible to avoid troubles such as excessive current abnormality and insufficient torque.
【0021】請求項3の発明は、前記電源電圧検出回路
の検出電圧に応じ、予め定めたV/F比率に基づいて前
記変換交流出力の周波数を補正するので、入力電源であ
る交流電源電圧が定格電圧より外れても変換交流出力の
周波数をV/F比率に基づいた周波数に補正するため、
誘導電動機のトルク補償を行うことができるという効果
がある。According to a third aspect of the present invention, the frequency of the converted AC output is corrected based on a predetermined V / F ratio according to the detection voltage of the power supply voltage detection circuit. Even if it deviates from the rated voltage, the frequency of the converted AC output is corrected to the frequency based on the V / F ratio.
There is an effect that the torque of the induction motor can be compensated.
【0022】請求項4の発明は、前記電源電圧検出回路
は、前記直流を電源として動作し、安定化した出力を制
御部に電源として供給するDC−DCコンバータの非安
定化出力の電圧より前記交流電源電圧を検出するので、
コストが高く大型となるようなACトランスを用いる必
要がなく、また欠相時のトラブルも無く、確実に交流電
源電圧を交流電源と絶縁した形で電源電圧を検出するこ
とができるという効果がある。According to a fourth aspect of the present invention, the power supply voltage detection circuit operates by using the direct current as a power supply and supplies the stabilized output to the control unit as a power supply from the voltage of the unstabilized output of the DC-DC converter. Since it detects the AC power supply voltage,
There is no need to use an AC transformer that is costly and large, and there is an effect that the AC power supply voltage can be reliably detected while the AC power supply voltage is insulated from the AC power supply without any trouble at the time of phase loss. .
【図1】本発明の実施例1の回路構成図である。FIG. 1 is a circuit configuration diagram of a first embodiment of the present invention.
【図2】同上の要部の具体的を構成を示す回路構成図で
ある。FIG. 2 is a circuit configuration diagram showing a specific configuration of a main part of the above.
【図3】同上の電源電圧検出回路の動作説明図である。FIG. 3 is an explanatory diagram of an operation of the above power supply voltage detection circuit.
【図4】同上の出力周波数補正の動作説明図である。FIG. 4 is an explanatory diagram of an output frequency correction operation of the above.
【図5】本発明の実施例2の回路構成図である。FIG. 5 is a circuit configuration diagram of a second embodiment of the present invention.
【図6】同上の出力電圧補正の動作説明図である。FIG. 6 is an explanatory diagram of an output voltage correction operation of the above.
【図7】従来例の動作説明図である。FIG. 7 is an operation explanatory diagram of a conventional example.
AC 交流電源 C1 平滑コンデンサ M 誘導電動機 1 整流回路 2 出力回路 3 ドライバ 4 制御部 5 周波数設定部 6 電源電圧検出回路 41 加減速制限回路 42 V/F変換器 43 電圧制御回路 44 周波数制御回路 45 PWM信号合成回路 46 補正回路 V 電圧制御信号 F 周波数制御信号AC AC power supply C 1 Smoothing capacitor M Induction motor 1 Rectifier circuit 2 Output circuit 3 Driver 4 Control unit 5 Frequency setting unit 6 Power supply voltage detection circuit 41 Acceleration / deceleration limiting circuit 42 V / F converter 43 Voltage control circuit 44 Frequency control circuit 45 PWM signal synthesis circuit 46 Correction circuit V voltage control signal F frequency control signal
フロントページの続き (72)発明者 泉本 智昭 大阪府門真市大字門真1048番地松下電工株 式会社内 (72)発明者 水野 博史 大阪府門真市大字門真1048番地松下電工株 式会社内 (72)発明者 立澤 一郎 大阪府門真市大字門真1048番地松下電工株 式会社内Front page continued (72) Inventor Tomoaki Izumimoto 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Ltd. (72) Inventor Hiroshi Mizuno 1048, Kadoma, Kadoma City, Osaka Matsushita Electric Works Ltd. Inventor Ichiro Tatezawa 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd.
Claims (4)
によって交流に変換し、この変換交流出力を誘導電動機
に供給するインバータ装置において、前記交流電源の電
圧を検出する電源電圧検出回路と、この電源電圧検出回
路の検出電圧に応じて前記変換交流出力を予め定めたV
/F比率となるように制御する制御部とを備えたことを
特徴とするインバータ装置。1. A power supply voltage detection circuit for detecting a voltage of the AC power supply in an inverter device for converting a direct current obtained by rectifying and smoothing an AC power supply into an AC by V / F control and supplying the converted AC output to an induction motor. , A predetermined V of the conversion AC output according to the detection voltage of the power supply voltage detection circuit
An inverter device, comprising: a control unit that controls the F / F ratio.
予め定めたV/F比率に基づいて前記変換交流出力の電
圧を補正することを特徴とする請求項1記載のインバー
タ装置。2. According to the detection voltage of the power supply voltage detection circuit,
The inverter device according to claim 1, wherein the voltage of the converted AC output is corrected based on a predetermined V / F ratio.
予め定めたV/F比率に基づいて前記変換交流出力の周
波数を補正することを特徴とする請求項1記載のインバ
ータ装置。3. According to the detection voltage of the power supply voltage detection circuit,
The inverter device according to claim 1, wherein the frequency of the converted AC output is corrected based on a predetermined V / F ratio.
として動作し、安定化した出力を制御部に電源として供
給するDC−DCコンバータの非安定化出力の電圧より
前記交流電源電圧を検出することを特徴とする請求項1
記載のインバータ装置。4. The power supply voltage detection circuit detects the AC power supply voltage from a voltage of an unstabilized output of a DC-DC converter which operates by using the direct current as a power supply and supplies a stabilized output to a control unit as a power supply. Claim 1 characterized by the above.
Inverter device described.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5097992A JPH06311787A (en) | 1993-04-23 | 1993-04-23 | Inverter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5097992A JPH06311787A (en) | 1993-04-23 | 1993-04-23 | Inverter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06311787A true JPH06311787A (en) | 1994-11-04 |
Family
ID=14207170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5097992A Withdrawn JPH06311787A (en) | 1993-04-23 | 1993-04-23 | Inverter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06311787A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005210861A (en) * | 2004-01-26 | 2005-08-04 | Matsushita Electric Ind Co Ltd | Inverter control device for motor drive, and air conditioner |
KR100724489B1 (en) * | 2005-05-11 | 2007-06-04 | 엘에스산전 주식회사 | Arrangement for compensating the deviation of inverter input voltage and method therefor |
-
1993
- 1993-04-23 JP JP5097992A patent/JPH06311787A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005210861A (en) * | 2004-01-26 | 2005-08-04 | Matsushita Electric Ind Co Ltd | Inverter control device for motor drive, and air conditioner |
KR100724489B1 (en) * | 2005-05-11 | 2007-06-04 | 엘에스산전 주식회사 | Arrangement for compensating the deviation of inverter input voltage and method therefor |
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