JPH0530775A - Controller for induction motor - Google Patents

Controller for induction motor

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Publication number
JPH0530775A
JPH0530775A JP3179364A JP17936491A JPH0530775A JP H0530775 A JPH0530775 A JP H0530775A JP 3179364 A JP3179364 A JP 3179364A JP 17936491 A JP17936491 A JP 17936491A JP H0530775 A JPH0530775 A JP H0530775A
Authority
JP
Japan
Prior art keywords
induction motor
temperature
slip frequency
control
rotor
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.)
Pending
Application number
JP3179364A
Other languages
Japanese (ja)
Inventor
Yuji Tetsuya
裕司 鉄谷
Original Assignee
Fuji Electric Co Ltd
富士電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd, 富士電機株式会社 filed Critical Fuji Electric Co Ltd
Priority to JP3179364A priority Critical patent/JPH0530775A/en
Publication of JPH0530775A publication Critical patent/JPH0530775A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE:To improve the control performance of a slip frequency control by making it possible to operate the rotor resistance value of an induction motor and in its turn the slip frequency of the motor with high accuracy. CONSTITUTION:A falter circuit 2 is provided between a temperature sensor 1 and computing element 3 to make a rotor side temperature inferable so that the rotor resistance value and slip frequency of an induction motor can be obtained with high accuracy for the purpose of contriving to improve a control performance.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】この発明は、すべり周波数形ベクトル制御装置を用いて誘導電動機(以下、単にモータともいう)を制御するための制御装置に関する。 BACKGROUND OF THE INVENTION This invention is an induction motor using a slip frequency type vector control apparatus (hereinafter, simply referred to as a motor) to a control device for controlling.

【0002】 [0002]

【従来の技術】モータの電圧,電流をベクトル量とみなし、固定子巻線上から観測すると交流量となるこれら諸量を、モータ回転軸上から観測することにより直流量に変換しこれを磁束に平行な成分と直交する成分とに分離し、それぞれを独立に制御するいわゆるすべり周波数形ベクトル制御は広く知られている(必要ならば、例えば「電気工学ポケットブック」1990年4月25日(株)オーム社発行、P929〜931参照)。 BACKGROUND OF THE INVENTION motor voltage is regarded as vector quantity current, these quantities to be the AC amount observed from the stator windings, the magnetic flux which was converted into a DC quantity by observing from the motor shaft separated into a component that is perpendicular to the parallel component, if the so-called slip frequency type vector control to control each independently widely known (necessary, for example, "electrical engineering pocket book" 1990 April 25 (Co. ) ohm company issue, see P929~931). かかる制御におけるすべり周波数ω slは、 ω sl =R 2 (t)・i T * /Φ 2 *として求められる。 Slip frequency ω sl in such control is obtained as ω sl = R 2 (t) · i T * / Φ 2 *. ここに、Φ 2 *は二次磁束指令値、 Here, Φ 2 * the secondary magnetic flux command value,
T *は二次磁束に直交する電流指令値(トルク電流指令値)、R 2 (t)は電動機二次抵抗値をそれぞれ示している。 i T * denotes a current command value that is orthogonal to the secondary flux (torque current command value), R 2 (t) is the motor secondary resistance value respectively.

【0003】ところで、上記のようなすべり周波数形ベクトル制御では、電動機二次抵抗値を求めることが必要となるため、従来は例えば図2の如き構成にてこれを求めている。 [0003] In the slip frequency type vector control as described above, since it is necessary to determine the motor secondary resistance, conventionally seeking this in configuration, such as FIG. 2, for example. すなわち、サーミスタ素子等の検温素子1をモータの一次側(固定子;ステータ側)に取り付けてその出力を演算器3に与え、ここで次式のような演算をして二次抵抗値R 2 (t)を求める。 That is, the primary side of the motor temperature detection element 1, such as a thermistor element; attached to (stator stator side) gives its output to the arithmetic unit 3, here in the calculation as follows secondary resistance R 2 seek (t). 4はベクトル制御装置であり、良く知られているのでここでは単にブラックボックスで示している。 4 is a vector controller, it is simply indicated by black boxes here because it is well known. 2 (t)={(t+k)・R 2 (0)}/k なお、R 2 (0)は温度0℃における二次抵抗値、kは回転子(ロータ)の材質によって決まる係数、tは検温素子1の検出値(ステータ側温度)をそれぞれ示す。 R 2 (t) = {( t + k) · R 2 (0)} / k Note, R 2 (0) is the secondary resistance value at temperature 0 ° C., k is a coefficient determined by the material of the rotor (rotor), t indicates the detection value of the temperature measurement element 1 (stator-side temperature), respectively.

【0004】 [0004]

【発明が解決しようとする課題】しかしながら、上記のような方法では二次抵抗またはすべり周波数に誤差が生じるという問題がある。 [SUMMARY OF THE INVENTION However, in the method as described above has a problem that an error occurs in the rotor resistance or slip frequency. すなわち、モータを運転する場合はまずステータが温まり、ロータ側はその後徐々に温まるため、両者に温度差が生じることになる。 That is, when operating the motor first stator warm, because the rotor-side warms then gradually, so that the temperature difference between them occurs. つまり、 That is,
ロータ側の温度をステータ側の温度を用いて求めているため、実際の温度に対して誤差が生じ正確な温度が求められないというわけである。 Since the temperature of the rotor side is determined using the temperature of the stator side, which mean that accurate temperature error occurs is not determined for the actual temperature. その結果、すべり周波数が最適値に対して誤差を生じ、この誤差によって制御性能が低下することになる。 As a result, cause errors slip frequency with respect to the optimum value, control performance will be reduced by this error. したがって、この発明の課題は電動機二次抵抗値を精度良く求められるようにし、制御性能を向上させることにある。 Accordingly, an object of the present invention as determined accurately motor secondary resistance, is to improve the control performance.

【0005】 [0005]

【課題を解決するための手段】このような課題を解決するため、この発明では、誘導電動機の一次電流を二次磁束に平行な励磁電流成分と垂直なトルク電流成分とに分解して制御するベクトル制御装置に対し、前記誘導電動機のステータ温度を検出する温度検出手段と、この検出温度にもとづき所定の演算をして誘導電動機の二次抵抗値を求める演算手段とを設け、この演算された二次抵抗値と二次磁束と前記トルク電流成分とから所定の演算をしてすべり周波数を求め、この周波数にもとづきすべり周波数制御を行なう誘導電動機の制御装置において、前記温度検出手段と演算手段との間に、検出温度から誘導電動機のロータ側温度を推定するためのフィルタ回路を設けたことを特徴としている。 [SUMMARY OF] To solve such a problem, in this invention, control is decomposed into parallel excitation current component and the vertical torque current component of the primary current of the induction motor secondary flux to the vector control unit, a temperature detection means for detecting a stator temperature of the induction motor, and an arithmetic means for obtaining a secondary resistance of the induction motor by a predetermined calculation based on the detected temperature provided, is this operation sought slip frequency by a predetermined operation from the secondary resistance and the secondary magnetic flux and the torque current component, in the control apparatus for an induction motor which performs based slip frequency control in this frequency, and the temperature detecting means and the calculating means between, it is characterized in that a filter circuit for estimating the rotor side temperature of the induction motor from the detected temperature.

【0006】 [0006]

【作用】検出手段と演算手段との間にフィルタ回路を設け、検出手段の検出温度から誘導電動機のロータ側温度を推定することにより電動機二次抵抗値、ひいてはすべり周波数をより正確に求められるようにする。 [Action] is provided a filter circuit between the detecting means and the calculating means, the motor secondary resistance value by estimating the rotor side temperature of the induction motor from the detected temperature of the detecting means, as required and thus the slip frequency more accurately to.

【0007】 [0007]

【実施例】図1はこの発明の実施例を示す概要図である。 DETAILED DESCRIPTION FIG. 1 is a schematic view showing an embodiment of the present invention. この実施例は、上述のようなすべり周波数式ベクトル制御に必要なすべり周波数を得るために、電動機二次抵抗値を求める部分のみを示す。 This embodiment, in order to obtain a slip frequency required for slip frequency type vector control as described above, shows only the portion for obtaining the motor secondary resistance value. つまり、その他の部分は公知ないしは周知であるので、ここでは図示を省略している。 That is, since other portions are known or well known, is omitted from the illustration. すなわち、同図からも明らかなように、この実施例は検温素子1と演算器3との間にフィルタ回路2を設けた点が特徴であり、その他は図2と同様である。 That is, as is apparent from the figure, this embodiment is characterized that provided a filter circuit 2 between the temperature measuring device 1 and the operation unit 3, the other is the same as that of FIG. このフィルタ回路2は検出されたモータのステータ温度からロータ温度を推定する機能を有しており、その時定数をロータの熱時定数に合わせることにより、ロータ温度を正確に求めることができ、その結果、二次抵抗値をより正確に求めることが可能となる。 The filter circuit 2 has a function of estimating the rotor temperature from the stator temperature is detected the motor by matching the time constant to the thermal time constant of the rotor, it is possible to determine the rotor temperature accurately, as a result , it is possible to obtain a secondary resistance value more accurately.

【0008】 [0008]

【発明の効果】この発明によれば、温度検出手段と演算手段との間にフィルタ回路を設けるだけの簡単な構成により、二次抵抗値およびすべり周波数を従来のものより正確に求めることが可能となり、その結果、制御性能を上げることが可能となる利点が得られる。 Effect of the Invention] The present invention, with a simple configuration of only providing the filter circuit between the operation means and the temperature detecting means, the secondary resistance and slip frequency can be accurately obtained than the conventional , and consequently, advantages that it becomes possible to increase the control performance.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】この発明の実施例を示す概要図である。 1 is a schematic diagram showing an embodiment of the present invention.

【図2】従来例を示す概要図である。 2 is a schematic diagram showing a conventional example.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 検温素子 2 フィルタ回路 3 演算器 4 ベクトル演算器 1 temperature detection element 2 filter 3 calculator 4 vector calculator

Claims (1)

  1. 【特許請求の範囲】 【請求項1】 誘導電動機の一次電流を二次磁束に平行な励磁電流成分と垂直なトルク電流成分とに分解して制御するベクトル制御装置に対し、前記誘導電動機のステータ温度を検出する温度検出手段と、この検出温度にもとづき所定の演算をして誘導電動機の二次抵抗値を求める演算手段とを設け、この演算された二次抵抗値と二次磁束と前記トルク電流成分とから所定の演算をしてすべり周波数を求め、この周波数にもとづきすべり周波数制御を行なう誘導電動機の制御装置において、 前記温度検出手段と演算手段との間に、検出温度から誘導電動機のロータ側温度を推定するためのフィルタ回路を設けたことを特徴とする誘導電動機の制御装置。 Claims 1. A contrast vector controller for controlling decomposed into parallel excitation current component and the vertical torque current component in the secondary flux of the primary current of the induction motor, the induction motor stator temperature detecting means for detecting a temperature, and an arithmetic means for obtaining a secondary resistance of the induction motor by a predetermined calculation based on the detected temperature provided, the torque and the calculated secondary resistance and secondary flux seek slip frequency and a current component by a predetermined calculation, in the control apparatus for an induction motor which performs based slip frequency control in this frequency, between said temperature detecting means and calculating means, the rotor of the induction motor from the detected temperature control for an induction motor, characterized in that a filter circuit for estimating the side temperature.
JP3179364A 1991-07-19 1991-07-19 Controller for induction motor Pending JPH0530775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3179364A JPH0530775A (en) 1991-07-19 1991-07-19 Controller for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3179364A JPH0530775A (en) 1991-07-19 1991-07-19 Controller for induction motor

Publications (1)

Publication Number Publication Date
JPH0530775A true JPH0530775A (en) 1993-02-05

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Family Applications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006325334A (en) * 2005-05-19 2006-11-30 Toshiba Mitsubishi-Electric Industrial System Corp Power conversion device
JP2008157439A (en) * 2006-11-28 2008-07-10 Jtekt Corp Magnetic bearing device and compressor for fuel cell
US8002766B2 (en) 2001-06-29 2011-08-23 Coloplast A/S Catheter assembly
US8986286B2 (en) 2001-06-29 2015-03-24 Coloplast A/S Catheter device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8002766B2 (en) 2001-06-29 2011-08-23 Coloplast A/S Catheter assembly
US8986286B2 (en) 2001-06-29 2015-03-24 Coloplast A/S Catheter device
US10441454B2 (en) 2001-06-29 2019-10-15 Coloplast A/S Urinary catheter provided as a package
JP2006325334A (en) * 2005-05-19 2006-11-30 Toshiba Mitsubishi-Electric Industrial System Corp Power conversion device
JP2008157439A (en) * 2006-11-28 2008-07-10 Jtekt Corp Magnetic bearing device and compressor for fuel cell

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