JP2007259586A - Rotary machine control device and rotary machine control method - Google Patents

Rotary machine control device and rotary machine control method Download PDF

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JP2007259586A
JP2007259586A JP2006080977A JP2006080977A JP2007259586A JP 2007259586 A JP2007259586 A JP 2007259586A JP 2006080977 A JP2006080977 A JP 2006080977A JP 2006080977 A JP2006080977 A JP 2006080977A JP 2007259586 A JP2007259586 A JP 2007259586A
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temperature
constant
permanent magnet
rotating machine
machine control
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JP4946118B2 (en
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Yuji Sasaki
裕司 佐々木
Sukeaki Aida
祐明 会田
Kazutaka Doke
和隆 道家
Takashi Majima
隆司 真島
Narifumi Tojima
成文 遠嶋
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IHI Corp
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IHI Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary machine control device and method capable of estimating a permanent magnet temperature by calculating motor torque from measurement values including a voltage, a current, motor revolutions by a motor driver while the motor is in operation and by comparing it with the temperature dependency of a torque constant. <P>SOLUTION: The rotary machine control device 1 which controls a rotary machine using permanent magnets to protect itself from demagnetization at a high temperature is provided with a constant acquisition portion 3 that acquires various constants while the motor 2 is in operation, a temperature estimate portion 4 that estimates temperatures of the permanent magnets from the constant measured by the constant obtaining portion 3, and a protective portion 5 that protects the demagnetization of the permanent magnets based on the temperatures of the permanent magnets estimated by the temperature estimate portion 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、永久磁石を用いたモータ及び発電機などの回転機の性能喪失につながる、永久磁石の高温減磁を保護する回転制御装置及び回転制御方法に関する。   The present invention relates to a rotation control device and a rotation control method for protecting high temperature demagnetization of a permanent magnet, which leads to loss of performance of a rotating machine such as a motor and a generator using a permanent magnet.

モータ及び発電機などの回転機では温度の過度の上昇から回転機を保護する必要がある。下記特許文献１には、モータの巻き線温度を、モータ停止時に巻き線抵抗を計測することで測定する方法が提案されている。この特許文献１の方法は、サーミスタなどの温度検出器を使用せず、モータ巻線の過熱保護を行うことを目的としている。電流制御を有するモータ制御システムにおいて、制御開始時のみモータに電力を供給する電力線を通じてモータ温度を測定し、これとモータ電流指令値から推定した温度上昇値から現在の温度を算出する。この運転中のモータ温度が所定の上限値を超えた場合に、モータへの電力供給を停止する。   In rotating machines such as motors and generators, it is necessary to protect the rotating machines from excessive temperature rise. Patent Document 1 below proposes a method for measuring the winding temperature of a motor by measuring the winding resistance when the motor is stopped. The method of Patent Document 1 is intended to protect the motor windings from overheating without using a temperature detector such as a thermistor. In a motor control system having current control, the motor temperature is measured through a power line that supplies power to the motor only at the start of control, and the current temperature is calculated from the temperature rise value estimated from this and the motor current command value. When the motor temperature during the operation exceeds a predetermined upper limit value, power supply to the motor is stopped.

また、下記特許文献２には、ロータに配設された永久磁石の低温減磁を防止するために、モータコイル温度から永久磁石温度を推定する方法が開示されている。この方法は、電流制限器は、温度検出器が検出する温度に基いてモータジェネレータの永久磁石の温度を推定演算するというものである。その温度が設定温度を下回って減磁する虞が生じた場合に、永久磁石の温度低下による保磁力の大きさの低減割合と同等以上の割合で指令電流を低減させる。
特開平９−２６１８５０号公報 特開２００４−１８７３３９号公報 Patent Document 2 listed below discloses a method for estimating the permanent magnet temperature from the motor coil temperature in order to prevent low temperature demagnetization of the permanent magnet disposed on the rotor. In this method, the current limiter estimates and calculates the temperature of the permanent magnet of the motor generator based on the temperature detected by the temperature detector. When there is a possibility that the temperature falls below the set temperature and demagnetizes, the command current is reduced at a rate equal to or greater than the rate of reduction of the coercive force due to the temperature drop of the permanent magnet.
JP-A-9-261850 JP 2004-187339 A

ところで、上記特許文献１に記載のモータ停止時に巻線抵抗測定する方法は、モータ運転中にモータ温度を計測できない問題点がある。また、この方法では永久磁石モータの磁石温度を計測することはできない。   Incidentally, the method of measuring the winding resistance when the motor is stopped as described in Patent Document 1 has a problem that the motor temperature cannot be measured during motor operation. Further, this method cannot measure the magnet temperature of the permanent magnet motor.

また、上記特許文献２のモータコイル温度から永久磁石温度を推定する方法は、永久磁石温度を直接計測していないため、磁石温度推定手段として不充分である。   Further, the method of estimating the permanent magnet temperature from the motor coil temperature of Patent Document 2 is not sufficient as a magnet temperature estimating means because the permanent magnet temperature is not directly measured.

本発明は、上記実情に鑑みてなされたものであり、モータ運転中に、ロータの永久磁石温度を推定し、推定結果に基いて回転機を制御することができる回転機制御装置及び回転機制御方法の提供を目的とする。   The present invention has been made in view of the above circumstances, and a rotating machine control device and a rotating machine control capable of estimating a permanent magnet temperature of a rotor during motor operation and controlling the rotating machine based on the estimation result. The purpose is to provide a method.

本発明に係る回転制御装置は、前記課題を解決するために、永久磁石を回転子に用いた回転機を高温減磁から保護するために制御する回転機制御装置において、前記回転機動作時に当該回転機の定数を取得する定数取得手段と、前記定数取得手段により測定された定数から前記永久磁石の温度を推定する温度推定手段と、前記温度推定手段により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を防ぐ保護手段とを備える。   In order to solve the above problems, the rotation control device according to the present invention is a rotation machine control device that controls a rotation machine using a permanent magnet as a rotor to protect against high-temperature demagnetization. Constant acquisition means for acquiring a constant of the rotating machine, temperature estimation means for estimating the temperature of the permanent magnet from the constant measured by the constant acquisition means, and based on the temperature of the permanent magnet estimated by the temperature estimation means. And protective means for preventing demagnetization of the permanent magnet.

この回転制御装置にあって、定数取得手段は、トルク定数を計算にて測定して取得し、前記温度推定手段は前記トルク定数から前記永久磁石の温度を推定するのが好ましい。   In this rotation control device, it is preferable that the constant acquisition means measures and acquires a torque constant by calculation, and the temperature estimation means estimates the temperature of the permanent magnet from the torque constant.

また、間欠的に誘起電圧定数を計算にて測定して取得し、前記温度推定手段は前記誘起電圧定数から前記永久磁石の温度を推定することが好ましい。   Further, it is preferable that the induced voltage constant is intermittently measured and obtained by calculation, and the temperature estimating means estimates the temperature of the permanent magnet from the induced voltage constant.

また、前記定数取得手段は前記回転機に通電されている電圧、電流及び回転数から回転機動作時の各種定数を計算する定数計算手段を有してなり、前記温度推定手段は前記定数計算手段により計算された定数から前記永久磁石の温度を推定し、前記保護手段は前記温度推定手段により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を保護するのが好ましい。   Further, the constant acquisition means includes constant calculation means for calculating various constants during operation of the rotating machine from the voltage, current and rotational speed applied to the rotating machine, and the temperature estimation means is the constant calculating means. Preferably, the temperature of the permanent magnet is estimated from the constant calculated by the above, and the protection means protects the demagnetization of the permanent magnet based on the temperature of the permanent magnet estimated by the temperature estimation means.

また、前記定数計算手段は前記回転機に通電されている電圧、電流及び回転数から回転機動作時のトルク定数を計算し、前記温度推定手段は前記トルク定数から前記永久磁石の温度を推定するのが好ましい。   Further, the constant calculating means calculates a torque constant during operation of the rotating machine from the voltage, current and rotational speed applied to the rotating machine, and the temperature estimating means estimates the temperature of the permanent magnet from the torque constant. Is preferred.

本発明に係る回転機制御方法は、前記課題を解決するために、永久磁石を回転子に用いた回転機を高温減磁から保護するために制御する回転機制御方法において、前記回転機動作時の各種定数を取得する定数取得工程と、前記定数取得工程により測定された定数から前記永久磁石の温度を推定する温度推定工程と、前記温度推定工程により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を保護する保護工程とを備える。   In order to solve the above problems, the rotating machine control method according to the present invention is a rotating machine control method for controlling a rotating machine using a permanent magnet as a rotor to protect against high temperature demagnetization. A constant obtaining step for obtaining various constants, a temperature estimating step for estimating the temperature of the permanent magnet from the constants measured in the constant obtaining step, and a temperature of the permanent magnet estimated by the temperature estimating step. A protection step for protecting the demagnetization of the permanent magnet.

この回転機制御方法にあって、前記定数取得工程は、トルク定数を計算にて測定して取得し、前記温度推定工程は前記トルク定数から前記永久磁石の温度を推定することが好ましい。   In this rotating machine control method, it is preferable that the constant obtaining step obtains a torque constant by measurement, and the temperature estimation step estimates the temperature of the permanent magnet from the torque constant.

また、前記定数取得工程は、間欠的に誘起電圧定数を計算にて測定して取得し、前記温度推定手段は前記誘起電圧定数から前記永久磁石の温度を推定することが好ましい。   Moreover, it is preferable that the said constant acquisition process measures and acquires an induced voltage constant intermittently by calculation, and the said temperature estimation means estimates the temperature of the said permanent magnet from the said induced voltage constant.

また、前記定数取得工程は前記回転機に通電されている電圧、電流及び回転数から回転機動作時の各種定数を計算する定数計算工程を有してなり、前記温度推定工程は前記定数計算工程により計算された定数から前記永久磁石の温度を推定し、前記保護工程は前記温度推定工程により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を保護することが好ましい。   The constant acquisition step includes a constant calculation step for calculating various constants during operation of the rotating machine from the voltage, current, and rotational speed applied to the rotating machine, and the temperature estimating step includes the constant calculating step. It is preferable that the temperature of the permanent magnet is estimated from the constant calculated by the above, and the protection step protects the demagnetization of the permanent magnet based on the temperature of the permanent magnet estimated by the temperature estimation step.

また、前記定数計算工程は前記回転機に通電されている電圧、電流及び回転数から回転機動作時のトルク定数を計算し、前記温度推定工程は前記トルク定数から前記永久磁石の温度を推定するのが好ましい。   The constant calculating step calculates a torque constant during operation of the rotating machine from the voltage, current, and rotational speed applied to the rotating machine, and the temperature estimating step estimates the temperature of the permanent magnet from the torque constant. Is preferred.

永久磁石は温度上昇に対して、一定の割合で磁場が減少するため、磁石温度によってモータの誘起電圧定数あるいはトルク定数が一意に定まる。逆に言えばモータの誘起電圧定数あるいはトルク定数からモータ内の磁石温度を求めることができる。   Since the magnetic field of the permanent magnet decreases at a constant rate with respect to the temperature rise, the induced voltage constant or torque constant of the motor is uniquely determined by the magnet temperature. Conversely, the magnet temperature in the motor can be obtained from the induced voltage constant or torque constant of the motor.

本発明は、モータ運転中に、モータドライバにて電圧、電流、モータ回転数などの計測値からモータトルクを計算し、トルク定数の温度依存性と照らし合わせることで永久磁石温度を推定する。推定された永久磁石温度が高温消磁する温度に近い場合には、モータ停止あるいはモータトルクを制限することで、永久磁石温度の更なる上昇を抑え、モータの保護を図る。   In the present invention, during motor operation, a motor torque is calculated from measured values such as voltage, current, and motor rotation speed by a motor driver, and the permanent magnet temperature is estimated by comparing with the temperature dependence of the torque constant. When the estimated permanent magnet temperature is close to the temperature at which high temperature demagnetization is performed, the motor is stopped or the motor torque is limited to prevent further increase in the permanent magnet temperature and to protect the motor.

本発明に係る回転機制御装置及び回転機制御方法によれば、モータ運転中に、ロータの永久磁石温度を推定し、推定結果に基いて回転機を制御することができる。また、モータ内部に温度センサを取り付けることなく、永久磁石同期機の温度保護を行うことができるため、モータ内部の温度センサおよびモータドライバ側の温度センサのインターフェースが不要となる。   According to the rotating machine control device and the rotating machine control method according to the present invention, the permanent magnet temperature of the rotor can be estimated during motor operation, and the rotating machine can be controlled based on the estimation result. Further, since the temperature protection of the permanent magnet synchronous machine can be performed without attaching a temperature sensor inside the motor, an interface between the temperature sensor inside the motor and the temperature sensor on the motor driver side becomes unnecessary.

モータ巻線温度ではなく、モータ回転子の永久磁石温度を直接推定するため、巻線温度と永久磁石温度の相関性や温度時定数に影響されることなく、永久磁石の高温消磁を回避することができる。   Since the permanent magnet temperature of the motor rotor is directly estimated rather than the motor winding temperature, high temperature demagnetization of the permanent magnet is avoided without being affected by the correlation between the winding temperature and the permanent magnet temperature or the temperature time constant. Can do.

モータドライバが通常計測している電圧、電流、回転数などの信号から磁石温度を推定するため、センサを追加することなく、モータの過熱保護が可能である。   Since the magnet temperature is estimated from signals such as voltage, current, and rotation speed that are normally measured by the motor driver, it is possible to protect the motor from overheating without adding a sensor.

以下、本発明を実施するための最良の形態について図面を参照しながら説明する。   The best mode for carrying out the present invention will be described below with reference to the drawings.

図１は本発明の実施の形態となる、回転機制御装置１の概略的な構成を示す図である。この例では、回転機はモータであるが、発電機に本発明を適用できることを制限するものではない。   FIG. 1 is a diagram showing a schematic configuration of a rotating machine control device 1 according to an embodiment of the present invention. In this example, the rotating machine is a motor, but it does not limit that the present invention can be applied to a generator.

図１にあって、回転機制御装置１は、永久磁石を回転子に用いた回転機を高温減磁から保護するために制御する回転機制御装置であり、モータ２動作時の当該回転機の定数を取得する定数取得部３と、定数取得部３により測定された定数から前記永久磁石の温度を推定する温度推定部４と、温度推定部４により推定された永久磁石の温度に基いて永久磁石の消磁を保護する保護部５とを備える。定数取得部３と温度推定部４と保護部５は、モータドライバ６の内部に含まれて機能する。   In FIG. 1, a rotating machine control device 1 is a rotating machine control device that controls a rotating machine that uses a permanent magnet as a rotor to protect it from high-temperature demagnetization. The constant acquisition unit 3 for acquiring a constant, the temperature estimation unit 4 for estimating the temperature of the permanent magnet from the constant measured by the constant acquisition unit 3, and the permanent magnet based on the temperature of the permanent magnet estimated by the temperature estimation unit 4 And a protection unit 5 for protecting the demagnetization of the magnet. The constant acquisition unit 3, the temperature estimation unit 4, and the protection unit 5 are included in the motor driver 6 and function.

定数取得部３は、トルク定数を測定して取得し、温度推定部４は前記トルク定数から前記永久磁石の温度を推定する。   The constant acquisition unit 3 measures and acquires the torque constant, and the temperature estimation unit 4 estimates the temperature of the permanent magnet from the torque constant.

また、定数取得部３は、間欠的に誘起電圧定数を測定して取得し、温度推定部４は前記トルク定数から前記永久磁石の温度を推定するようにしてもよい。   The constant acquisition unit 3 may intermittently measure and acquire the induced voltage constant, and the temperature estimation unit 4 may estimate the temperature of the permanent magnet from the torque constant.

定数取得部３はモータ２に通電されている電圧、電流及び回転数から回転機動作時の各種定数を計算する定数計算部３ａを有してなり、温度推定部４は前記定数計算部３ａにより計算された定数から前記永久磁石の温度を推定し、保護部５は温度推定部４により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を防ぐ。   The constant acquisition unit 3 includes a constant calculation unit 3a that calculates various constants during operation of the rotating machine from the voltage, current, and rotational speed applied to the motor 2, and the temperature estimation unit 4 is controlled by the constant calculation unit 3a. The temperature of the permanent magnet is estimated from the calculated constant, and the protection unit 5 prevents demagnetization of the permanent magnet based on the temperature of the permanent magnet estimated by the temperature estimation unit 4.

また、定数計算部３ａはモータ２機に通電されている電圧、電流及び回転数から回転機動作時のトルク定数を計算し、温度推定部４は前記トルク定数から前記永久磁石の温度を推定する。   The constant calculator 3a calculates a torque constant during operation of the rotating machine from the voltage, current, and rotational speed applied to the two motors, and the temperature estimation unit 4 estimates the temperature of the permanent magnet from the torque constant. .

モータ２の回転子に用いる永久磁石は温度上昇に対して、一定の割合で磁場が減少する。このため、磁石温度によってモータ２のトルク定数が一意に定まる。温度推定部４は、トルク定数からモータ２内の磁石温度を求めることができる。   In the permanent magnet used for the rotor of the motor 2, the magnetic field decreases at a constant rate with respect to the temperature rise. For this reason, the torque constant of the motor 2 is uniquely determined by the magnet temperature. The temperature estimation unit 4 can obtain the magnet temperature in the motor 2 from the torque constant.

特に、モータドライバ６は、モータ２運転中に、モータドライバ６の定数取得部３にて電圧、電流、モータ回転数などの計測値からモータトルクを計算し、トルク定数の温度依存性と照らし合わせることで温度推定部４にて永久磁石温度を推定する。推定された永久磁石温度が高温消磁する温度に近い場合には、保護部５がモータ停止あるいはモータトルクを制限することで、永久磁石温度の更なる上昇を抑え、モータの保護を図る。   In particular, the motor driver 6 calculates the motor torque from measured values such as voltage, current, and motor rotation speed in the constant acquisition unit 3 of the motor driver 6 during operation of the motor 2, and compares it with the temperature dependence of the torque constant. Thus, the temperature estimation unit 4 estimates the permanent magnet temperature. When the estimated permanent magnet temperature is close to the temperature at which high temperature demagnetization is performed, the protection unit 5 stops the motor or limits the motor torque, thereby suppressing further increase in the permanent magnet temperature and protecting the motor.

これにより、モータ２運転中に、ロータの永久磁石温度を推定し、推定結果に基いて回転機を制御することができる。また、モータ内部に温度センサを取り付けることなく、永久磁石同期機の温度保護を行うことができるため、モータ内部の温度センサおよびモータドライバ側の温度センサのインターフェースが不要となる。   Thereby, during operation of the motor 2, the permanent magnet temperature of the rotor can be estimated, and the rotating machine can be controlled based on the estimation result. Further, since the temperature protection of the permanent magnet synchronous machine can be performed without attaching a temperature sensor inside the motor, an interface between the temperature sensor inside the motor and the temperature sensor on the motor driver side becomes unnecessary.

モータ巻線温度ではなく、モータ回転子の永久磁石温度を直接推定するため、巻線温度と永久磁石温度の相関性や温度時定数に影響されることなく、永久磁石の高温消磁を回避することができる。   Since the permanent magnet temperature of the motor rotor is directly estimated rather than the motor winding temperature, high temperature demagnetization of the permanent magnet is avoided without being affected by the correlation between the winding temperature and the permanent magnet temperature or the temperature time constant. Can do.

モータドライバ６内の定数取得部３が定数計算部３ａを用いて、通常計測している電圧、電流、回転数などの信号から、温度推定部４が磁石温度を推定するため、センサを追加することなく、保護部５にてモータの過熱保護が可能である。   The constant acquisition unit 3 in the motor driver 6 uses the constant calculation unit 3a to add a sensor so that the temperature estimation unit 4 estimates the magnet temperature from signals such as voltage, current, and rotation speed that are normally measured. Without overheating, the overheating protection of the motor can be performed by the protection unit 5.

図２は、モータドライバ６内部の定数取得部３、温度推定部４、保護部５の詳細な構成を示した図である。図２にあって、出力計算部３ａは定数取得部３の定数計算部３ａの具体例であり、モータ２の電流、電圧から出力を計算する。   FIG. 2 is a diagram showing a detailed configuration of the constant acquisition unit 3, the temperature estimation unit 4, and the protection unit 5 inside the motor driver 6. In FIG. 2, the output calculation unit 3 a is a specific example of the constant calculation unit 3 a of the constant acquisition unit 3, and calculates the output from the current and voltage of the motor 2.

トルク計算部３ｂは、定数取得部３に含まれるものであり、モータ２のトルクを計算する。また、トルク定数計算部３ｃは、トルク定数を計算する。このトルク定数計算部３ｃで計算されたトルク定数は、演算増幅器よりなる比較器４にてトルク定数下限値３ｄと比較される。比較器４は、温度推定部４を構成するものであり、比較結果を保護部５の具体例であるスイッチング部５に供給する。   The torque calculation unit 3 b is included in the constant acquisition unit 3 and calculates the torque of the motor 2. The torque constant calculator 3c calculates a torque constant. The torque constant calculated by the torque constant calculation unit 3c is compared with the torque constant lower limit value 3d by the comparator 4 including an operational amplifier. The comparator 4 constitutes the temperature estimation unit 4 and supplies the comparison result to the switching unit 5 which is a specific example of the protection unit 5.

スイッチング部５は、比較器４からなる温度推定部にて推定した磁石温度が高温消磁する温度に近い場合には、モータ停止あるいはモータトルクを低減するようにスイッチを切り替え、磁石の消磁を保護する。   When the magnet temperature estimated by the temperature estimation unit comprising the comparator 4 is close to the temperature at which high temperature demagnetization is performed, the switching unit 5 switches the switch to reduce the motor stop or motor torque, thereby protecting the magnet demagnetization. .

図３は、磁石の温度による消磁特性を示す図である。磁石温度が２０℃から例えば２００℃の範囲にある可逆領域では、磁石の磁束密度Ｂ［Ｗｂ／ｍ２］は例えばある永久磁石の種類では−０．０９（％／℃）でリニアに減少する。Ｔｅという臨界点を過ぎると、不可逆領域となり、磁束密度は急激に減少し０となる。 FIG. 3 is a diagram showing the demagnetization characteristics depending on the temperature of the magnet. In the reversible region where the magnet temperature is in the range of 20 ° C. to 200 ° C., for example, the magnetic flux density B [Wb / m 2 ] of the magnet decreases linearly at −0.09 (% / ° C.), for example, for certain permanent magnet types. . When the critical point of Te is passed, it becomes an irreversible region, and the magnetic flux density rapidly decreases and becomes zero.

図１及び図２に示した回転機制御装置１は、モータ２に用いる永久磁石が前記可逆領域内にて使用されるように、モータ２のトルク定数を計算しながら永久磁石の温度を推定し、モータを保護する。   1 and 2 estimates the temperature of the permanent magnet while calculating the torque constant of the motor 2 so that the permanent magnet used for the motor 2 is used in the reversible region. Protect the motor.

もちろん、モータ２のトルク定数を直接測定できる構成であれば、定数取得部３は不要である。   Of course, the constant acquisition unit 3 is unnecessary if the torque constant of the motor 2 can be directly measured.

また、上述したように、定数取得部３は、間欠的に誘起電圧定数を測定して取得し、温度推定部４は前記トルク定数から前記永久磁石の温度を推定するようにしてもよい。   Further, as described above, the constant acquisition unit 3 may intermittently measure and acquire the induced voltage constant, and the temperature estimation unit 4 may estimate the temperature of the permanent magnet from the torque constant.

図４は電源又はインバータ１０により固定子巻き線に励磁電流が供給されて永久磁石からなる回転子を回転するモータ２の結線状態を示す。このときのモータ定数はｋT［Nm/A］である。   FIG. 4 shows a connection state of the motor 2 that rotates the rotor made of a permanent magnet when an excitation current is supplied to the stator winding by the power source or the inverter 10. The motor constant at this time is kT [Nm / A].

一方、図５に示すように、負荷である駆動源１１に電力を供給する発電機１２が、図６に示すように永久磁石の回転子１２を、三相のコイル１２ｂ中で、回転することにより、発生する誘起電圧定数は、電圧計１３によって測定された交流波形（正弦波）の電圧（図７）を、回転周波数rpmで割った値ＫE［Ｖ／rpm］としてあらわされる。   On the other hand, as shown in FIG. 5, a generator 12 that supplies power to a drive source 11 that is a load rotates a rotor 12 of a permanent magnet in a three-phase coil 12b as shown in FIG. Thus, the generated induced voltage constant is expressed as a value KE [V / rpm] obtained by dividing the voltage (FIG. 7) of the AC waveform (sine wave) measured by the voltmeter 13 by the rotation frequency rpm.

回転機制御装置１の概略的な構成を示す図である。1 is a diagram showing a schematic configuration of a rotating machine control device 1. FIG. モータドライバ内部の定数取得部、温度推定部、保護部の詳細な構成を示した図である。It is the figure which showed the detailed structure of the constant acquisition part in a motor driver, a temperature estimation part, and a protection part. 磁石の温度による消磁特性を示す図である。It is a figure which shows the demagnetization characteristic by the temperature of a magnet. 電源又はインバータにより固定子巻き線に励磁電流が供給されて永久磁石からなる回転子を回転するモータの結線状態を示す図である。It is a figure which shows the connection state of the motor which rotates the rotor which consists of a permanent magnet when excitation current is supplied to a stator winding by a power supply or an inverter. 発電機の接続状態を示す図である。It is a figure which shows the connection state of a generator. 永久磁石の回転子と、三相コイルの構造図である。FIG. 3 is a structural diagram of a permanent magnet rotor and a three-phase coil. 交流電圧波形（正弦波）図である。It is an AC voltage waveform (sine wave) diagram.

符号の説明Explanation of symbols

１・・・回転機制御装置
２・・・モータ
３・・・定数取得部
３ａ・・・定数計算部
４・・・温度推定部
５・・・保護部 DESCRIPTION OF SYMBOLS 1 ... Rotation machine control apparatus 2 ... Motor 3 ... Constant acquisition part 3a ... Constant calculation part 4 ... Temperature estimation part 5 ... Protection part

Claims (10)

永久磁石を回転子に用いた回転機を高温減磁から保護するために制御する回転機制御装置において、
前記回転機動作時に当該回転機の定数を取得する定数取得手段と、
前記定数取得手段により測定された定数から前記永久磁石の温度を推定する温度推定手段と、
前記温度推定手段により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を防ぐ保護手段と
を備えることを特徴とする回転機制御装置。 In a rotating machine control device that controls a rotating machine using a permanent magnet as a rotor to protect it from high-temperature demagnetization,
Constant acquisition means for acquiring a constant of the rotating machine during operation of the rotating machine;
Temperature estimation means for estimating the temperature of the permanent magnet from the constant measured by the constant acquisition means;
A rotating machine control device comprising: protection means for preventing demagnetization of the permanent magnet based on the temperature of the permanent magnet estimated by the temperature estimation means. 前記定数取得手段は、トルク定数を計算にて測定して取得し、前記温度推定手段は前記トルク定数から前記永久磁石の温度を推定することを特徴とする請求項１記載の回転機制御装置。   2. The rotating machine control device according to claim 1, wherein the constant acquisition unit measures and acquires a torque constant by calculation, and the temperature estimation unit estimates the temperature of the permanent magnet from the torque constant. 前記定数取得手段は、間欠的に誘起電圧定数を測定して取得し、前記温度推定手段は前記トルク定数から前記永久磁石の温度を推定することを特徴とする請求項１記載の回転機制御装置。   The rotating machine control device according to claim 1, wherein the constant acquisition means intermittently measures and acquires an induced voltage constant, and the temperature estimation means estimates the temperature of the permanent magnet from the torque constant. . 前記定数取得手段は前記回転機に通電されている電圧、電流及び回転数から回転機動作時の各種定数を計算する定数計算手段を有してなり、前記温度推定手段は前記定数計算手段により計算された定数から前記永久磁石の温度を推定し、前記保護手段は前記温度推定手段により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を保護することを特徴とする請求項１記載の回転機制御装置。   The constant acquisition means includes constant calculation means for calculating various constants during operation of the rotating machine from the voltage, current and rotational speed applied to the rotating machine, and the temperature estimation means is calculated by the constant calculating means. The temperature of the permanent magnet is estimated from the calculated constant, and the protection means protects the demagnetization of the permanent magnet based on the temperature of the permanent magnet estimated by the temperature estimation means. Rotating machine control device. 前記定数計算手段は前記回転機に通電されている電圧、電流及び回転数から回転機動作時のトルク定数を計算し、前記温度推定手段は前記トルク定数から前記永久磁石の温度を推定することを特徴とする請求項４記載の回転機制御装置。   The constant calculating means calculates a torque constant during operation of the rotating machine from the voltage, current and rotational speed applied to the rotating machine, and the temperature estimating means estimates the temperature of the permanent magnet from the torque constant. The rotating machine control device according to claim 4, wherein 永久磁石を回転子に用いた回転機を高温減磁から保護するために制御する回転機制御方法において、
前記回転機動作時の各種定数を取得する定数取得工程と、
前記定数取得工程により測定された定数から前記永久磁石の温度を推定する温度推定工程と、
前記温度推定工程により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を保護する保護工程と
を備えることを特徴とする回転機制御方法。 In a rotating machine control method for controlling a rotating machine using a permanent magnet as a rotor to protect it from high temperature demagnetization,
A constant acquisition step of acquiring various constants during operation of the rotating machine;
A temperature estimation step of estimating the temperature of the permanent magnet from the constant measured by the constant acquisition step;
And a protection step for protecting the demagnetization of the permanent magnet based on the temperature of the permanent magnet estimated by the temperature estimation step. 前記定数取得工程は、トルク定数を測定して取得し、前記温度推定工程は前記トルク定数から前記永久磁石の温度を推定することを特徴とする請求項６記載の回転機制御方法。   The rotating machine control method according to claim 6, wherein the constant obtaining step measures and obtains a torque constant, and the temperature estimating step estimates the temperature of the permanent magnet from the torque constant. 前記定数取得工程は、間欠的に誘起電圧定数を測定して取得し、前記温度推定手段は前記トルク定数から前記永久磁石の温度を推定することを特徴とする請求項６記載の回転機制御方法。   7. The rotating machine control method according to claim 6, wherein the constant obtaining step intermittently measures and obtains an induced voltage constant, and the temperature estimating means estimates the temperature of the permanent magnet from the torque constant. . 前記定数取得工程は前記回転機に通電されている電圧、電流及び回転数から回転機動作時の各種定数を計算する定数計算工程を有してなり、前記温度推定工程は前記定数計算工程により計算された定数から前記永久磁石の温度を推定し、前記保護工程は前記温度推定工程により推定された前記永久磁石の温度に基いて前記永久磁石の消磁を保護することを特徴とする請求項６記載の回転機制御方法。   The constant acquisition step includes a constant calculation step for calculating various constants during operation of the rotating machine from the voltage, current and rotational speed applied to the rotating machine, and the temperature estimation step is calculated by the constant calculation step. The temperature of the permanent magnet is estimated from the calculated constant, and the protection step protects the demagnetization of the permanent magnet based on the temperature of the permanent magnet estimated by the temperature estimation step. Rotating machine control method. 前記定数計算工程は前記回転機に通電されている電圧、電流及び回転数から回転機動作時のトルク定数を計算し、前記温度推定工程は前記トルク定数から前記永久磁石の温度を推定することを特徴とする請求項９記載の回転機制御方法。   The constant calculation step calculates a torque constant during operation of the rotating machine from the voltage, current and rotational speed applied to the rotating machine, and the temperature estimation step estimates the temperature of the permanent magnet from the torque constant. The rotating machine control method according to claim 9, wherein:
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