JP2000262087A5 - - Google Patents
Download PDFInfo
- Publication number
- JP2000262087A5 JP2000262087A5 JP1999061998A JP6199899A JP2000262087A5 JP 2000262087 A5 JP2000262087 A5 JP 2000262087A5 JP 1999061998 A JP1999061998 A JP 1999061998A JP 6199899 A JP6199899 A JP 6199899A JP 2000262087 A5 JP2000262087 A5 JP 2000262087A5
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- current
- output terminal
- switching element
- motor
- 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
- 230000001939 inductive effect Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000051 modifying Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Description
【0001】
【発明の属する技術分野】
本発明は、電力変換装置を提供する技術に関する。[0001]
Field of the Invention
The present invention relates to a technique for providing a power conversion device.
【0012】
本発明の目的は、マイクロサージなどによる電機子巻線での絶縁破壊の発生等が検出できること、または、異常等が判定できるようにした交流電動機の異常判定機能を備えた電力変換装置を提供することにある。[0012]
An object of the present invention, the micro-surge Rukoto can detect the occurrence of dielectric breakdown in the armature winding due to, or abnormality power converter having an abnormality determination function of the AC electric motor so as to be determined to To provide.
【0016】
3は順変換部で、4は平滑用のコンデンサであり、この順変換部3により、商用交流電源ACから供給された交流が整流され、平滑化された直流がコンデンサ4の端子間に得られることになる。
5は逆変換部で、図10の従来技術における逆変換部In と同様に、6個のIGBTからなるスイッチング用の半導体素子u、v、w、x、y、zで構成されており、これにコンデンサ4で平滑化された直流電圧Vdc が供給されるようになっている。[0016]
3 is a forward conversion unit, 4 is a smoothing capacitor, and the forward conversion unit 3 rectifies alternating current supplied from the commercial alternating current power supply AC, and smoothed direct current is obtained between the terminals of the capacitor 4 It will be.
5 is the inverse transform unit, the inverse transform unit In the prior art of FIG. 10 In the same manner, the switching semiconductor elements u, v, w, x, y, z are formed of six IGBTs, and the DC voltage V dc smoothed by the capacitor 4 is supplied thereto. It has become.
【0017】
従って、この逆変換部5のスイッチング素子u、v、w、x、y、zが夫々PWM(パルス幅変調)制御されることにより、誘導電動機2に所望の電圧で所望の周波数の3相交流電力が供給されることになる。
6は電圧検出器で、順変換部3から出力され、コンデンサ4により平滑化された直流電圧V dc と、逆変換部5の出力端子に現れる直流電圧によりV a を検出する働きをする。
7は電流検出器で、インバータ部5と誘導電動機2の間に流れる電流を検出する働きをするものであり、具体的には、図10に示した従来技術と同じく、2個の電流検出器CTU、CTWからなるものである。[0017]
Accordingly, the switching elements u, v, w, x, y, z of the inverse conversion unit 5 are respectively controlled by PWM (pulse width modulation) control, whereby a three-phase AC of a desired frequency with a desired voltage for the induction motor 2 Power will be supplied.
6 is a voltage detector, is output from the rectifier unit 3 to the DC voltage V dc smoothed by the capacitor 4, a function of detecting the V a by the DC voltage appearing at the output terminal of the inverse transform unit 5.
A current detector 7 serves to detect the current flowing between the inverter unit 5 and the induction motor 2. Specifically, as in the prior art shown in FIG. 10, two current detectors are provided. It consists of CTU and CTW.
【0038】
ところで、一般的なインバータ装置には、それ自体の制御のため、電圧検出器や電流検出器を備えているのが通例である。
従って、この実施形態における電圧検出器6と電流検出器7については、インバータ装置1が備えている検出器をそのまま利用することができるので、新たに設置する必要は無く、その分、コスト面で有利になる。[0038]
By the way, it is common that a general inverter device is provided with a voltage detector and a current detector for control of itself.
Therefore, as for the voltage detector 6 and the current detector 7 in this embodiment, since the detector provided in the inverter device 1 can be used as it is, there is no need to newly install it, and in terms of cost, It will be advantageous.
【0040】
誘導電動機2がデルタ結線型の場合は、次のようにする。
まず、図3に示すように、逆変換器5のスイッチング素子u〜zのうち、上アーム側ではスイッチング素子uだけをオンに、そして下アーム側ではスイッチング素子y、zをオンにし、これにより、一点鎖線で示すように、出力端子U、V、Wから電流Iu、Iv、Iw を誘導電動機2の電機子巻線に通流させる。[0040]
When the induction motor 2 is a delta connection type, the following is performed.
First, as shown in FIG. 3, among the switching elements u to z of the inverter 5, on the upper arm side, only the switching element u is turned on, and on the lower arm side, the switching elements y and z are turned on. As shown by a dot-and-dash line, currents I u , I v , I w are caused to flow from the output terminals U, V , W to the armature winding of the induction motor 2.
【0042】
そして、電圧検出器6から出力端子U、V、W間の電圧Va を取り込み、同時に電流検出器7からは電流I u を取り込み、次の(4)式により抵抗値を求め、これを1次抵抗Ru とする。
Ru =Va/Iu …… ……(4)[0042]
The output terminal U from the voltage detector 6, V, captures the voltage V a between W, captures the current I u is the current detector 7 at the same time, it obtains the resistance value by the following equation (4), which 1 It is assumed that the next resistance R u .
R u = V a / I u ...... (4)
【0043】
次に、今度は図4に示すように、スイッチング素子vとスイッチング素子x、スイッチング素子zをオンにし、このときの出力端子W、U、V間の電圧Va と電流I v (=−Iu−I w)から、次の(6)式により抵抗値を求め、これを1次抵抗R v とする。
R v =Va/Iw …… ……(6)[0043]
Then, this time as shown in FIG. 4, the switching element v and the switching element x, the switching element z is turned on, the output terminal W in this case, U, the voltage between V V a and current I v (= -I From u − I w ), the resistance value is obtained by the following equation (6), and this is taken as the primary resistance R v .
R v = V a / I w ...... (6)
【0044】
そして、最後には、図5に示すように、スイッチング素子wとスイッチング素子x、スイッチング素子yをオンにし、このときの出力端子V、W、Z間の電圧V a と電流I w から、次の(7)式により抵抗値を求め、これを1次抵抗R w とするのである。
R w =Va/Iw …… ……(7)[0044]
And, finally, as shown in FIG. 5, the switching element w and the switching element x, the switching element y is turned on, the output terminal V in this case, W, voltage V a and current I w or al between Z, The resistance value is obtained by the following equation (7), and this is taken as the primary resistance R w .
R w = V a / I w ...... (7)
【0045】
次に、誘導電動機2がスター結線型の場合については、次の通りにする。
まず、図6に示すように、スイッチング素子uと、スイッチング素子y、zをオンにし、出力端子Uから誘導電動機2に電流Iu を供給し、出力端子Uからは電流I u を取り込み、次の(8)式により求めた値を1次抵抗R w とする。
このときの電圧Va は、出力端子U、V間の電圧又は出力端子U、W間の電圧となる。
Ru =Va/Iu …… ……(8)[0045]
Next, the case where the induction motor 2 is a star connection type is as follows.
First, as shown in FIG. 6, the switching element u and the switching elements y and z are turned on, the current I u is supplied from the output terminal U to the induction motor 2, and the current I u is captured from the output terminal U. The value obtained by the equation (8) is set as the primary resistance R w .
Voltage V a at this time, the output terminal U, a voltage between V or output terminal U, a voltage between the W.
R u = V a / I u ...... (8)
【0046】
次に、図7に示すように、スイッチング素子vと、スイッチング素子y、zをオンにし、電流I v (=−Iu−I w)から、次の(9)式により抵抗値を求め、これを1次抵抗Rv とする。このときの電圧Va は、出力端子V、U間の電圧又は出力端子V、W間の電圧となる。
Rv =Va/Iv …… ……(9)[0046]
Next, as shown in FIG. 7, a switching element v, switching element y, turn on z, current I v - determined from (= -I u I w), the resistance value by the following equation (9), Let this be the primary resistance Rv . Voltage V a at this time, the output terminal V, the voltage or the output terminal V, the voltage between the W between U.
R v = V a / I v ...... (9)
【0052】
本発明の実施形態によれば、交流電動機の1次抵抗値の初期値からの減少の程度が逐次判定され、その結果が表示されるので、マイクロサージによる交流電動機の絶縁抵抗の低下に伴う二次災害の虞れが未然に防止できる。[0052]
According to the embodiment of the present invention , the degree of decrease from the initial value of the primary resistance value of the AC motor is determined one by one, and the result is displayed. The risk of the next disaster can be prevented in advance.
【0053】
この結果、本発明の実施形態によれば、負荷として駆動すべき交流電動機に対する接続線路が長い場合でも、信頼性が低下する虞れがなく、高い信頼性を容易に保つことができる。
また、本発明の実施形態によれば、交流電動機の異常が報知されるので、異常発生に際しても二次的な災害に至る前に正常な交流電動機に交換することができ、異常による運転停止に伴う損失を未然に防止することができる。 [0053]
As a result, according to the embodiment of the present invention , even when the connection line to the AC motor to be driven as a load is long, there is no possibility that the reliability is lowered, and high reliability can be easily maintained.
Further, according to the embodiment of the present invention, since the abnormality of the AC motor is notified, even when an abnormality occurs, the AC motor can be replaced with a normal AC motor before a secondary disaster is caused. It is possible to prevent the accompanying loss in advance.
【0054】
【発明の効果】
本発明によれば、マイクロサージなどによる電機子巻線での絶縁破壊の発生等が検出できること、または、異常等が判定できるようにした交流電動機の異常判定機能を備えた電力変換装置を提供できることになる。 [0054]
【Effect of the invention】
According to the present invention, it is possible to provide a power converter having an abnormality determination function of an AC motor capable of detecting the occurrence of insulation breakdown or the like in an armature winding due to a microsurge or the like, or capable of determining an abnormality or the like. become.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP06199899A JP3768024B2 (en) | 1999-03-09 | 1999-03-09 | Power converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP06199899A JP3768024B2 (en) | 1999-03-09 | 1999-03-09 | Power converter |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2000262087A JP2000262087A (en) | 2000-09-22 |
JP2000262087A5 true JP2000262087A5 (en) | 2004-12-24 |
JP3768024B2 JP3768024B2 (en) | 2006-04-19 |
Family
ID=13187402
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP06199899A Expired - Lifetime JP3768024B2 (en) | 1999-03-09 | 1999-03-09 | Power converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3768024B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4450082B2 (en) * | 2008-03-10 | 2010-04-14 | トヨタ自動車株式会社 | Electric motor drive device and control method thereof |
KR101895866B1 (en) * | 2012-09-03 | 2018-09-07 | 현대모비스 주식회사 | Apparatus and Method for Detecting Switching Element Breakdown |
-
1999
- 1999-03-09 JP JP06199899A patent/JP3768024B2/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7667941B2 (en) | Power supply circuit protecting method and apparatus for the same | |
EP2779391B1 (en) | Active front end power converter with boost mode derating to protect filter inductor | |
US6809942B2 (en) | System interconnection electric power generator and control method therefor | |
US8816625B2 (en) | Integrated regenerative AC drive with solid state precharging | |
JP3775053B2 (en) | Inverter device | |
JP4097494B2 (en) | Three-phase AC motor drive inverter device | |
KR20180103338A (en) | Method and apparatus for detecting inter-phase short circuit of three-phase motor and air conditioner including the same | |
KR102362713B1 (en) | Power transforming apparatus having thermal protection function | |
KR20040041201A (en) | power supply apparatus for motor and controlling method thereof | |
US20200052641A1 (en) | Method for detecting a motor phase fault of a motor arrangement and drive circuit for driving an electronically commutated motor | |
JPH05223906A (en) | Ground fault detection controller | |
US9419548B2 (en) | Method and control circuit for controlling a brushless electric motor | |
JP2000262087A5 (en) | ||
US6646896B2 (en) | Controller of AC machine | |
JP2001218474A (en) | Method and apparatus for detecting ground fault of inverter | |
KR100452991B1 (en) | A power factor control circuit of air-conditioner | |
JPH0543800U (en) | Inverter device | |
JP4391339B2 (en) | Auxiliary power supply for vehicle | |
KR102043216B1 (en) | Power transforming apparatus, Method for controlling the same and Air conditioner including the power transforming apparatus | |
JP4415428B2 (en) | Motor control method | |
JP3768024B2 (en) | Power converter | |
KR101873764B1 (en) | Power transforming apparatus and air conditioner including the same | |
KR102116680B1 (en) | Power supply apparatus for air conditioner | |
JPH0681416B2 (en) | AC motor drive | |
CN113169664A (en) | Single-phase power factor correction circuit for a bridge branch of a neutral conductor with network frequency commutation |