JPH0823697A - Device and method for starting sensorless motor - Google Patents
Device and method for starting sensorless motorInfo
- Publication number
- JPH0823697A JPH0823697A JP6175916A JP17591694A JPH0823697A JP H0823697 A JPH0823697 A JP H0823697A JP 6175916 A JP6175916 A JP 6175916A JP 17591694 A JP17591694 A JP 17591694A JP H0823697 A JPH0823697 A JP H0823697A
- Authority
- JP
- Japan
- Prior art keywords
- exciting
- integrator
- output
- rotor
- signal
- 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
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、永久磁石形回転子を備
えたセンサレスモータの起動装置およびその起動方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starting device for a sensorless motor having a permanent magnet rotor and a starting method thereof.
【０００２】[0002]
【従来の技術】従来、永久磁石を有する回転子と励磁コ
イルを有する固定子とを備えたモータで、回転子の回転
位置をホール素子などの回転検出器を用いない、いわゆ
るセンサレスモータを起動する場合、固定子に設けた励
磁コイルに生じる誘起電圧を位置検出に用いている。し
かし、誘起電圧は回転速度に比例するため、回転子が所
定値以上の回転速度に達しないと、所定の誘起電圧が発
生せず、回転子の位置を検出できない。それで、所定値
の回転速度までは、外部の励磁回路で起動する方法や、
起動時に励磁コイルに高周波の電流を流して回転子を振
動させ、所定の誘起電圧を発生させて回転子の位置を検
出する方法が開示されている（例えば、特開平４−１８
３２５２号）。2. Description of the Related Art Conventionally, a motor provided with a rotor having a permanent magnet and a stator having an exciting coil is used to start a so-called sensorless motor in which the rotation position of the rotor does not use a rotation detector such as a Hall element. In this case, the induced voltage generated in the exciting coil provided on the stator is used for position detection. However, since the induced voltage is proportional to the rotation speed, if the rotor does not reach the rotation speed equal to or higher than a predetermined value, the predetermined induction voltage is not generated and the position of the rotor cannot be detected. So, up to a predetermined rotation speed, a method of starting with an external excitation circuit,
A method is disclosed in which a high-frequency current is passed through an exciting coil at the time of start-up to vibrate the rotor and a predetermined induced voltage is generated to detect the position of the rotor (for example, Japanese Patent Laid-Open No. 4-18).
No. 3252).
【０００３】[0003]
【発明が解決しようとする課題】ところが、従来技術で
は、所定の誘起電圧が発生するまでは、位置検出回路が
機能しないため、起動時間が長くなるという問題があっ
た。本発明は、簡単な構成で短時間で起動できるセンサ
レスモータの起動回路および起動方法を提供することを
目的とするものである。However, in the prior art, there is a problem that the start-up time becomes long because the position detection circuit does not function until a predetermined induced voltage is generated. An object of the present invention is to provide a starting circuit and a starting method for a sensorless motor that can be started in a short time with a simple configuration.
【０００４】[0004]
【課題を解決するための手段】上記問題を解決するた
め、本発明は、永久磁石を有する回転子と、前記回転子
を回転させるための回転磁界を発生する複数相の励磁コ
イルを有する固定子とからなる回転検出器を有しないセ
ンサレスモータの起動装置において、前記励磁コイルの
励磁電圧を発生するパワー回路と、前記励磁コイルの誘
起電圧を検出する誘起電圧検出器と、前記誘起電圧検出
器の出力を積分する積分器と、前記積分器の出力と速度
指令とを乗算する乗算器と、前記励磁コイルを前記パワ
ー回路を介して励磁する励磁電流通電信号と前記積分器
をリセットするリセット信号とを発生し、かつ前記積分
器の出力と前記励磁電流通電信号とを切り替える切替信
号を発生するパルスシーケンス回路と、前記積分器の出
力と前記励磁電流通電信号とを切り替える切り替え回路
とを備えたものである。また、永久磁石を有する回転子
と、前記回転子を回転させるための回転磁界を発生する
励磁コイルを有する固定子とからなる回転検出器を有し
ないセンサレスモータの起動方法において、前記励磁コ
イルの励磁電圧を発生するパワー回路と、前記励磁コイ
ルの誘起電圧を検出する誘起電圧検出器と、前記誘起電
圧検出器の出力を積分する積分器と、前記積分器の出力
と速度指令とを乗算する乗算器と、前記励磁コイルに励
磁電流通電信号と前記積分器をリセットするリセット信
号とを発生し、かつ前記積分器の出力と前記励磁電流通
電信号とを切り替える切替信号を発生するパルスシーケ
ンス回路と、前記積分器の出力と前記励磁電流通電信号
とを切り替える切り替え回路とを備え、前記パルスシー
ケンス回路から励磁電流通電信号を前記切替回路を介し
て複数相のうちの１相の前記乗算器に入力して励磁電圧
指令信号を前記パワー回路に出力し、１相の前記励磁コ
イルを励磁して前記回転子の磁極位置を決めたあと、他
の１相の励磁コイルの誘起電圧を積分する前記積分器を
リセットし、次に前記他の１相の前記励磁コイルを励磁
して前記回転子の磁極位置を決めたあと、前記１相の励
磁コイルの誘起電圧を積分する前記積分器をリセット
し、順次他の１相の励磁コイルを励磁した後、前記次の
励磁コイルの誘起電圧を積分する積分器を順次リセット
した後、前記切り替え回路により前記乗算器の入力を前
記パルスシーケンス回路の出力から前記積分器の出力に
切り替える方法である。In order to solve the above problems, the present invention is directed to a rotor having a permanent magnet and a stator having a plurality of phases of exciting coils for generating a rotating magnetic field for rotating the rotor. In a starting device for a sensorless motor not having a rotation detector consisting of, a power circuit that generates an exciting voltage of the exciting coil, an induced voltage detector that detects an induced voltage of the exciting coil, and an induced voltage detector. An integrator that integrates the output, a multiplier that multiplies the output of the integrator and a speed command, an exciting current energizing signal that excites the exciting coil through the power circuit, and a reset signal that resets the integrator. And a pulse sequence circuit for generating a switching signal for switching the output of the integrator and the excitation current conduction signal, and the output of the integrator and the excitation current communication. It is obtained by a switching circuit for switching a signal. In addition, in a method of starting a sensorless motor that does not include a rotation detector that includes a rotor having a permanent magnet and a stator having an exciting coil that generates a rotating magnetic field for rotating the rotor, the excitation of the exciting coil is performed. A power circuit that generates a voltage, an induced voltage detector that detects the induced voltage of the exciting coil, an integrator that integrates the output of the induced voltage detector, and a multiplication that multiplies the output of the integrator and the speed command. And a pulse sequence circuit for generating a switching signal for generating an excitation current energization signal and a reset signal for resetting the integrator in the excitation coil, and for switching the output of the integrator and the excitation current energization signal, A switching circuit that switches between the output of the integrator and the exciting current energizing signal is provided, and the exciting current energizing signal is turned off from the pulse sequence circuit. The exciting voltage command signal is input to the multiplier of one phase out of a plurality of phases via the circuit to output the exciting voltage command signal to the power circuit, and the exciting coil of one phase is excited to determine the magnetic pole position of the rotor. After that, the integrator that integrates the induced voltage of the other one-phase exciting coil is reset, and then the other one-phase exciting coil is excited to determine the magnetic pole position of the rotor. After resetting the integrator that integrates the induced voltage of the phase exciting coil, sequentially exciting the other one-phase exciting coil, and sequentially resetting the integrator that integrates the induced voltage of the next exciting coil, A switching circuit switches the input of the multiplier from the output of the pulse sequence circuit to the output of the integrator.
【０００５】[0005]
【作用】上記手段により、パルスシーケンス回路で発生
させるパルスのタイミングにしたがって各励磁コイルの
誘起電圧の積分値を初期化する。この状態で、回転子の
任意の停止位置から最大で回転子が１回転を極数で割っ
た角度だけ回転して磁極位置が決定する。回転子の正確
な磁極位置を決定した後、その状態から直ちに指令速度
で回転するので、起動時間を大幅に短縮することができ
る。By the above means, the integrated value of the induced voltage of each exciting coil is initialized in accordance with the timing of the pulse generated by the pulse sequence circuit. In this state, the magnetic pole position is determined by rotating the rotor from an arbitrary stop position by a maximum of one rotation divided by the number of poles. After the accurate magnetic pole position of the rotor is determined, the rotor immediately rotates at the command speed from that state, so that the starting time can be greatly shortened.
【０００６】[0006]
【実施例】以下、本発明を図に示す実施例について説明
する。図１は本発明の実施例の起動回路を示すブロック
図、図２は２相６極のセンサレスモータの正断面図であ
る。図において、１は永久磁石を有する回転子、２Ａ，
２Ｂは固定子に設けた励磁コイルである。３は励磁コイ
ル２Ａ，２ＢにそれぞれＡ相およびＢ相の励磁電流を供
給するパワー回路、４Ａ，４Ｂはパワー回路３にＡ相お
よびＢ相励磁指令信号α、βを出力する乗算器、５は切
り換え回路、６は起動回路のタイミングを決めるパルス
を発生するパルスシーケンス回路、７Ａ，７Ｂは励磁コ
イル２Ａ，２Ｂの誘起電圧を検出する誘起電圧検出器、
８Ａ，８Ｂは誘起電圧を積分する積分器、９は誘起電圧
から回転子の回転速度を検出する速度検出器、１０は速
度指令を増幅する速度アンプである。ここで起動回路の
動作を説明する。永久磁石を有する回転子１は、Ａ相，
Ｂ相の励磁コイル２Ａ，２Ｂに電気角で９０度位相の異
なる電流を流すことによって回転駆動される。励磁コイ
ル２Ａ，２Ｂに発生する誘起電圧は、図３に示すよう
に、９０度位相の異なる波形となるが、回転子１の磁極
位置は誘起電圧を積分器８Ａ，８Ｂによって積分するこ
とによって磁極位置信号が得られる。この磁極位置信号
と速度指令信号を乗算器４Ａ，４Ｂ乗算して得られる励
磁指令信号α、βに基づいてパワー回路３から駆動電流
を流すことにより、回転子１は指令速度で回転する。と
ころで、起動前では回転子１が任意の位置に停止してい
るため、そのままの状態で起動すると、図４に示すよう
に、磁極位置信号が積分開始のタイミングによってバイ
アスＣA ．ＣB が生じ、正確な磁極位置を示さない。そ
れで、図６に示すタイミングチャートのように、パルス
シーケンス回路６で発生させるパルスのタイミングにし
たがって誘起電圧の積分値を初期化して、正確な磁極位
置を決定する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a starting circuit of an embodiment of the present invention, and FIG. 2 is a front sectional view of a 2-phase 6-pole sensorless motor. In the figure, 1 is a rotor having a permanent magnet, 2A,
Reference numeral 2B is an exciting coil provided on the stator. 3 is a power circuit for supplying A-phase and B-phase exciting currents to the exciting coils 2A and 2B, respectively, and 4A and 4B are multipliers for outputting A-phase and B-phase exciting command signals α and β to the power circuit 3. A switching circuit, 6 is a pulse sequence circuit that generates a pulse that determines the timing of the starting circuit, 7A and 7B are induced voltage detectors that detect the induced voltage of the exciting coils 2A and 2B,
Reference numerals 8A and 8B are integrators that integrate the induced voltage, 9 is a speed detector that detects the rotational speed of the rotor from the induced voltage, and 10 is a speed amplifier that amplifies the speed command. Here, the operation of the starting circuit will be described. The rotor 1 having a permanent magnet has an A phase,
The B-phase exciting coils 2A and 2B are rotationally driven by passing currents having different electrical angles of 90 degrees in phase. The induced voltages generated in the exciting coils 2A and 2B have waveforms with different phases by 90 degrees as shown in FIG. 3, but the magnetic pole position of the rotor 1 is determined by integrating the induced voltages by the integrators 8A and 8B. A position signal is obtained. By causing a drive current to flow from the power circuit 3 based on the excitation command signals α and β obtained by multiplying the magnetic pole position signal and the speed command signal by the multipliers 4A and 4B, the rotor 1 rotates at the command speed. By the way, since the rotor 1 is stopped at an arbitrary position before starting, if the rotor 1 is started in that state, as shown in FIG. 4, the bias C A. C B occurs and does not show the exact magnetic pole position. Therefore, as shown in the timing chart of FIG. 6, the integrated value of the induced voltage is initialized according to the timing of the pulse generated by the pulse sequence circuit 6, and the accurate magnetic pole position is determined.
【０００７】すなわち、まず、図６（ａ）に示すよう
に、励磁電流通電信号を乗算器４Ａに出力してＡ相励磁
コイル２Ａのみ励磁すると、回転子１は任意に停止して
いた最初の磁極位置から、図２（ａ）に示す位置に回転
して停止する。この状態で、Ｂ相励磁コイルＢに鎖交す
る磁束は零であるので、図（ｂ）に示すリセット信号に
より、Ｂ相励磁コイル２Ｂに接続されたの積分器８Ｂを
リセットする。これで任意の位置から回転したことによ
って生じるＢ相励磁コイル２Ｂの誘起電圧の積分値のバ
イアスＣB は零となる。つぎに、図６（ｃ）に示す励磁
電流通電信号を乗算器４Ｂに出力して、Ｂ相励磁コイル
２Ｂのみを励磁すると、回転子１は図２（ｂ）に示す位
置で停止する。このとき、Ａ相励磁コイル２Ａの鎖交磁
束は零なので、図６（ｄ）に示すリセット信号により、
Ａ相コイル２Ａに接続された積分器８Ａをリセットす
る。これで最初の磁極位置から回転したことによって生
じるＡ相励磁コイルの積分値のバイアスＣA は零とな
る。この状態から起動すると、図５に示すように、磁極
位置信号はバイアスのない、正確な磁極位置を示す波形
となる。この状態で、図６（ｅ）に示す切り替え信号に
より、通電回路を切り換え回路５によってパルスシーケ
ンス回路６から積分器８Ａ，８Ｂの出力に切り換え、磁
極位置信号と速度指令信号とを乗算器４Ａ，４Ｂに入力
し、励磁指令信号α、βをパワー回路３に与えて回転子
１を起動し、指令速度で回転する。上記シーケンスにし
たがって、モータを起動することにより、例えば６極の
場合は、図２（ａ）に示した起動前の回転子の停止位置
から図２（ｂ）に示した位置までの回転角、すなわち回
転子１が最大、１回転を極数で割った角度である１／６
回転すれば、正確な磁極位置が決定する。この状態から
指令速度で起動する。したがって、従来の起動方法で起
動する場合、回転子が数１０回転後に所定の回転速度に
なるのに比べて、本発明の起動方法によれば、１回転以
下で所定の回転速度になるので、起動時間は大幅に短縮
することになる。なお、上記実施例では２相６極のセン
サレスモータの場合について説明したが、相数および極
数に限定されるものではない。That is, first, as shown in FIG. 6 (a), when an exciting current energization signal is output to the multiplier 4A to excite only the A-phase exciting coil 2A, the rotor 1 is first stopped arbitrarily. It rotates from the magnetic pole position to the position shown in FIG. In this state, since the magnetic flux interlinking with the B-phase exciting coil B is zero, the integrator 8B connected to the B-phase exciting coil 2B is reset by the reset signal shown in FIG. This integration value of the induced voltage in the B-phase exciting coil 2B caused by the rotation from an arbitrary position in the bias C B becomes zero. Next, when the exciting current energization signal shown in FIG. 6 (c) is output to the multiplier 4B to excite only the B-phase exciting coil 2B, the rotor 1 stops at the position shown in FIG. 2 (b). At this time, since the interlinkage magnetic flux of the A-phase exciting coil 2A is zero, the reset signal shown in FIG.
The integrator 8A connected to the A-phase coil 2A is reset. This bias C A of the integrated value of the A-phase exciting coil caused by the rotation from the initial magnetic pole position becomes zero. When starting from this state, as shown in FIG. 5, the magnetic pole position signal has a waveform with no bias and showing an accurate magnetic pole position. In this state, the switching circuit 5 switches the energizing circuit from the pulse sequence circuit 6 to the outputs of the integrators 8A and 8B by the switching signal shown in FIG. 6E, and the magnetic pole position signal and the speed command signal are multiplied by the multiplier 4A, 4B, the excitation command signals α and β are supplied to the power circuit 3, the rotor 1 is activated, and the rotor 1 rotates at the command speed. By activating the motor according to the above sequence, for example, in the case of 6 poles, the rotation angle from the stop position of the rotor before activation shown in FIG. 2 (a) to the position shown in FIG. 2 (b), That is, the maximum rotor 1 is 1/6 which is an angle obtained by dividing one rotation by the number of poles.
With rotation, the exact magnetic pole position is determined. Starting from this state at the command speed. Therefore, when starting by the conventional starting method, the rotor reaches a predetermined rotation speed after several tens of rotations, whereas according to the starting method of the present invention, the rotation speed reaches a predetermined rotation speed in one rotation or less. Startup time will be greatly reduced. In the above embodiment, the case of the 2-phase 6-pole sensorless motor has been described, but the number of phases and the number of poles are not limited.
【０００８】[0008]
【発明の効果】以上述べたように、本発明によれば、パ
ルスシーケンス回路により励磁コイルを励磁して回転子
の磁極位置を決めた後、速度指令と積分器とから乗算器
によって出力される励磁電圧指令をセンサレスモータの
パワー回路に入力して起動するので、速度指令で回転す
るまで１回転以下の初期化時間となり、構成が簡単で、
極めて短時間で起動ができるセンサレスモータの起動回
路および起動方法を提供できる効果がある。As described above, according to the present invention, after the exciting coil is excited by the pulse sequence circuit to determine the magnetic pole position of the rotor, the speed command and the integrator output the multiplier. Since the excitation voltage command is input to the power circuit of the sensorless motor to start it, the initialization time is one rotation or less before rotating with the speed command, and the configuration is simple,
There is an effect that it is possible to provide a starting circuit and a starting method for a sensorless motor that can start in an extremely short time.
【図１】 本発明の実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】 本発明の実施例の回転子の磁極位置を示す正
断面図である。FIG. 2 is a front sectional view showing a magnetic pole position of the rotor according to the embodiment of the present invention.
【図３】 励磁コイルの誘起電圧波形を示すグラフであ
る。FIG. 3 is a graph showing an induced voltage waveform of an exciting coil.
【図４】 リセット前の積分器の出力波形を示すグラフ
である。FIG. 4 is a graph showing an output waveform of the integrator before resetting.
【図５】 リセット後の積分器の出力波形を示すグラフ
である。FIG. 5 is a graph showing an output waveform of the integrator after reset.
【図６】 パルスシーケンス回路のタイミングチャート
である。FIG. 6 is a timing chart of a pulse sequence circuit.
１ 回転子、２Ａ，２Ｂ 励磁コイル、３ パワー回
路、４Ａ，４Ｂ 乗算器、５ 切り替え回路、６ パル
スシーケンス回路、７Ａ，７Ｂ 誘起電圧検出器、８
Ａ，８Ｂ 積分器、９ 速度検出器、１０ 速度アンプ1 Rotor, 2A, 2B Exciting Coil, 3 Power Circuit, 4A, 4B Multiplier, 5 Switching Circuit, 6 Pulse Sequence Circuit, 7A, 7B Induced Voltage Detector, 8
A, 8B integrator, 9 speed detector, 10 speed amplifier
フロントページの続き (72)発明者 浅沼 毅 福岡県北九州市八幡西区黒崎城石２番１号 株式会社安川電機内Front page continuation (72) Inventor Takeshi Asanuma 2-1, Kurosaki Shiroishi, Hachimansai-ku, Kitakyushu, Fukuoka Prefecture Yasukawa Electric Co., Ltd.
Claims (2)
を回転させるための回転磁界を発生する複数相の励磁コ
イルを有する固定子とからなる回転検出器を有しないセ
ンサレスモータの起動装置において、前記励磁コイルの
励磁電圧を発生するパワー回路と、前記励磁コイルの誘
起電圧を検出する誘起電圧検出器と、前記誘起電圧検出
器の出力を積分する積分器と、前記積分器の出力と速度
指令とを乗算する乗算器と、前記励磁コイルを前記パワ
ー回路を介して励磁する励磁電流通電信号と前記積分器
をリセットするリセット信号とを発生し、かつ前記積分
器の出力と前記励磁電流通電信号とを切り替える切替信
号を発生するパルスシーケンス回路と、前記積分器の出
力と前記励磁電流通電信号とを切り替える切り替え回路
とを備えたことを特徴とするセンサレスモータの起動装
置。1. A starting device for a sensorless motor having no rotation detector, which comprises a rotor having a permanent magnet and a stator having exciting coils of a plurality of phases for generating a rotating magnetic field for rotating the rotor. A power circuit for generating an exciting voltage of the exciting coil, an induced voltage detector for detecting an induced voltage of the exciting coil, an integrator for integrating an output of the induced voltage detector, and an output and a speed of the integrator. A multiplier for multiplying the command, an exciting current energizing signal for exciting the exciting coil through the power circuit, and a reset signal for resetting the integrator, and the output of the integrator and the exciting current energizing. A pulse sequence circuit for generating a switching signal for switching a signal and a switching circuit for switching between the output of the integrator and the exciting current energizing signal are provided. The starting device of the sensorless motor which is a characteristic.
を回転させるための回転磁界を発生する励磁コイルを有
する固定子とからなる回転検出器を有しないセンサレス
モータの起動方法において、前記励磁コイルの励磁電圧
を発生するパワー回路と、前記励磁コイルの誘起電圧を
検出する誘起電圧検出器と、前記誘起電圧検出器の出力
を積分する積分器と、前記積分器の出力と速度指令とを
乗算する乗算器と、前記励磁コイルに励磁電流通電信号
と前記積分器をリセットするリセット信号とを発生し、
かつ前記積分器の出力と前記励磁電流通電信号とを切り
替える切替信号を発生するパルスシーケンス回路と、前
記積分器の出力と前記励磁電流通電信号とを切り替える
切り替え回路とを備え、前記パルスシーケンス回路から
励磁電流通電信号を前記切替回路を介して複数相のうち
の１相の前記乗算器に入力して励磁電圧指令信号を前記
パワー回路に出力し、１相の前記励磁コイルを励磁して
前記回転子の磁極位置を決めたあと、他の１相の励磁コ
イルの誘起電圧を積分する前記積分器をリセットし、次
に前記他の１相の前記励磁コイルを励磁して前記回転子
の磁極位置を決めたあと、前記１相の励磁コイルの誘起
電圧を積分する前記積分器をリセットし、順次他の１相
の励磁コイルを励磁した後、前記次の励磁コイルの誘起
電圧を積分する積分器を順次リセットした後、前記切り
替え回路により前記乗算器の入力を前記パルスシーケン
ス回路の出力から前記積分器の出力に切り替えることを
特徴とするセンサレスモータの起動方法。2. A method of starting a sensorless motor having no rotation detector, which comprises a rotor having a permanent magnet and a stator having an exciting coil for generating a rotating magnetic field for rotating the rotor, the method comprising: A power circuit that generates an exciting voltage of the coil, an induced voltage detector that detects an induced voltage of the exciting coil, an integrator that integrates the output of the induced voltage detector, an output of the integrator, and a speed command. A multiplier for multiplying, generating an exciting current energizing signal in the exciting coil and a reset signal for resetting the integrator,
And a pulse sequence circuit that generates a switching signal that switches the output of the integrator and the excitation current energization signal, and a switching circuit that switches the output of the integrator and the excitation current energization signal, and from the pulse sequence circuit An exciting current energization signal is input to the multiplier of one phase out of a plurality of phases via the switching circuit, an exciting voltage command signal is output to the power circuit, and the exciting coil of one phase is excited to rotate. After determining the magnetic pole position of the child, the integrator that integrates the induced voltage of the other one-phase exciting coil is reset, and then the other one-phase exciting coil is excited to make the magnetic pole position of the rotor. After resetting, the integrator that integrates the induced voltage of the one-phase exciting coil is reset, the other one-phase exciting coils are sequentially excited, and then the induced voltage of the next exciting coil is integrated. After sequentially resetting vessel, the switching circuit and the multiplier sensorless motor starting method and switches the input from the output of the pulse sequence circuit at the output of the integrator of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17591694A JP3334344B2 (en) | 1994-07-04 | 1994-07-04 | Device and method for starting sensorless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17591694A JP3334344B2 (en) | 1994-07-04 | 1994-07-04 | Device and method for starting sensorless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0823697A true JPH0823697A (en) | 1996-01-23 |
| JP3334344B2 JP3334344B2 (en) | 2002-10-15 |
Family
ID=16004496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17591694A Expired - Fee Related JP3334344B2 (en) | 1994-07-04 | 1994-07-04 | Device and method for starting sensorless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3334344B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1267479A1 (en) * | 2001-06-15 | 2002-12-18 | Saia-Burgess Murten AG | DC brushless motor, method of starting and use thereof |
| JP2015133853A (en) * | 2014-01-14 | 2015-07-23 | 株式会社Ihi | sensorless motor device |
-
1994
- 1994-07-04 JP JP17591694A patent/JP3334344B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1267479A1 (en) * | 2001-06-15 | 2002-12-18 | Saia-Burgess Murten AG | DC brushless motor, method of starting and use thereof |
| JP2015133853A (en) * | 2014-01-14 | 2015-07-23 | 株式会社Ihi | sensorless motor device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3334344B2 (en) | 2002-10-15 |
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