JP5039845B1 - Embedded magnet synchronous motor and driving method thereof - Google Patents
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Abstract
【課題】ロータに埋込まれた永久磁石が発生する磁束を、該ロータに設けた永久磁石磁束弱めコイルによって弱める埋込磁石同期モータを提供することにある。
【解決手段】ステータと、該ステータに巻回された駆動コイルと、該ステータとギャップを介した、永久磁石が埋込まれたロータと、該駆動コイルを含むモータ駆動回路を有する埋込磁石同期モータにおいて、該埋込磁石同期モータは無線で電力と情報を送受信する電力情報送受信回路を有し、前記ロータに、前記永久磁石の磁束を弱めるために、該情報に基づいて励磁される永久磁石磁束弱めコイルが設けられている。
【選択図】 図１An object of the present invention is to provide an embedded magnet synchronous motor in which a magnetic flux generated by a permanent magnet embedded in a rotor is weakened by a permanent magnet magnetic flux weakening coil provided in the rotor.
A stator, a drive coil wound around the stator, a rotor embedded with a permanent magnet through a gap with the stator, and an embedded magnet synchronization having a motor drive circuit including the drive coil In the motor, the embedded magnet synchronous motor has a power information transmission / reception circuit that wirelessly transmits and receives power and information, and a permanent magnet excited on the rotor based on the information to weaken the magnetic flux of the permanent magnet. A flux weakening coil is provided.
[Selection] Figure 1
Description
本発明は、ロータに永久磁石磁束弱めコイルを設けた埋込磁石同期モータに関する。 The present invention relates to an embedded magnet synchronous motor in which a rotor is provided with a permanent magnet magnetic flux weakening coil.
埋込磁石同期モータは、将来、電気自動車（ＥＶ，Ｅｌｅｃｔｒｉｃ Ｖｅｈｉｃｌｅ）や、産業機械、民生機器等の幅広い分野で大量に使われることが期待されるが、その時には、地球温暖化対策の一翼を担わなければならない。その実現には、現在よりも高効率の埋込磁石同期モータが開発されていなければならない。 Embedded magnet synchronous motors are expected to be used in large quantities in a wide range of fields such as electric vehicles (EVs), industrial machines, and consumer products in the future. You have to bear. To achieve this, it is necessary to develop an embedded magnet synchronous motor that is more efficient than at present.
まず、従来の埋込磁石同期モータのロータの構造を説明する。 First, the structure of a rotor of a conventional embedded magnet synchronous motor will be described.
図８に、従来の埋込磁石同期モータのロータとステータの平面図を示す。該従来の埋込磁石同期モータ８は、ロータシャフト８１ａと、鉄心８１ｂと、該鉄心８１ｂに正方形に埋め込まれた永久磁石８３ａ，８３ｂ，８３ｃ，８３ｄを有するロータ８１と、該ロータ８１とギャップ８８を介した、駆動コイル（図示せず）が巻回されたスロット８２ａを有するステータ８２を有し、該ロータ８１には、磁束短絡防止用穴８４ａ，８４ｂが前記永久磁石８３ａが埋込まれる溝の両端に、同様に、磁束短絡防止用穴８５ａ，８５ｂが前記永久磁石８３ｂが埋込まれる溝の両端に、また、同様に、磁束短絡防止用穴８６ａ，８６ｂが前記永久磁石８３ｃが埋込まれる溝の両端に、さらに、同様に、磁束短絡防止用穴８７ａ，８７ｂが前記永久磁石８３ｄが埋込まれる溝の両端に設けられている（非特許文献１を参照）。 FIG. 8 shows a plan view of a rotor and a stator of a conventional embedded magnet synchronous motor. The conventional embedded magnet synchronous motor 8 includes a rotor shaft 81a, an iron core 81b, a rotor 81 having permanent magnets 83a, 83b, 83c, 83d embedded in the iron core 81b in a square shape, the rotor 81 and a gap 88. And a stator 82 having a slot 82a around which a driving coil (not shown) is wound, and the rotor 81 has grooves 84a and 84b for preventing magnetic short-circuiting in which the permanent magnet 83a is embedded. Similarly, magnetic flux short-circuit prevention holes 85a and 85b are embedded at both ends of the groove in which the permanent magnet 83b is embedded, and similarly, magnetic flux short-circuit prevention holes 86a and 86b are embedded in the permanent magnet 83c. Similarly, magnetic flux short-circuit prevention holes 87a and 87b are provided at both ends of the groove in which the permanent magnet 83d is embedded (see Non-Patent Document 1).
次に、従来の埋込磁石同期モータの駆動回路を説明する。 Next, a drive circuit for a conventional embedded magnet synchronous motor will be described.
図９に、従来の埋込磁石同期モータの駆動コイルを含む駆動回路を示す。該駆動回路９は、外部電源９１ａ，９１ｂとパワーオンリセット回路９５に接続されたモータコントローラ９２と、該モータコントローラ９２に接続するドライバ９３と、該ドライバ９３に接続する、スター結線された駆動コイル９４ａ，９４ｂ，９４ｃからなり、外部電源が投入されると、前記パワーオンリセット回路９５により、モータコントローラ９２はオンし、前記ドライバ９３から前記駆動コイル９４ａ，９４ｂ，９４ｃに順次、駆動電流が供給され、図８に示した、従来の埋込磁石同期モータ８が所定の回転数で回転し、前記外部電源９１ａ，９１ｂが遮断されると、前記パワーオンリセット回路９５により、前記モータコントローラ９２はオフし、前記ドライバ９３から前記駆動コイル９４ａ，９４ｂ，９４ｃへの駆動電流の供給が止まり、前記従来の埋込磁石同期モータ８は停止する。 FIG. 9 shows a drive circuit including a drive coil of a conventional embedded magnet synchronous motor. The drive circuit 9 includes a motor controller 92 connected to the external power supplies 91a and 91b and the power-on reset circuit 95, a driver 93 connected to the motor controller 92, and a star-connected drive coil connected to the driver 93. When the external power supply is turned on, the motor controller 92 is turned on by the power-on reset circuit 95 and the drive current is sequentially supplied from the driver 93 to the drive coils 94a, 94b, and 94c. When the conventional embedded magnet synchronous motor 8 shown in FIG. 8 rotates at a predetermined rotational speed and the external power sources 91a and 91b are shut off, the power-on reset circuit 95 causes the motor controller 92 to The drive current from the driver 93 to the drive coils 94a, 94b, 94c is turned off. Feeding is stopped, the conventional embedded magnet synchronous motor 8 stops.
図６に、従来の第１の永久磁石磁束弱め機構を設けたロータを有する埋込磁石同期モータのロータの動作説明図を示す。図６（ａ）は、ロータ６が静止する時のロータ６の平面図であり、該ロータ６は、非磁性材料からなる中空筒状の周壁体６２ｂと、ロータ軸６３と、２極（６４ａ，６４ｂ）の永久磁石６４と、非磁性材料からなる芯体６２ａと、磁束誘導体６１と、コイルスプリング６６ａ，６６ｂ，６６ｃ，６６ｄと、高透磁率材料からなる可動体６５ａ，６５ｂ，６５ｃ，６５ｄを有し、該可動体６５ａ，６５ｂ，６５ｃ，６５ｄは、それぞれ前記コイルスプリング６６ａ，６６ｂ，６６ｃ，６６ｄから引き込まれ、空隙部６８ａ，６８ｂ，６８ｃ，６８ｄが生じ、永久磁石６４の磁極Ｎ，６４ａから出た磁束６７ａは、磁束誘導体６４ｃに誘導され周壁体６２ｂを抜け出し、磁束誘導体６４ｄに誘導されて磁極Ｓ，６４ｂに戻る。 FIG. 6 is an operation explanatory view of a rotor of an embedded magnet synchronous motor having a rotor provided with a conventional first permanent magnet magnetic flux weakening mechanism. FIG. 6A is a plan view of the rotor 6 when the rotor 6 is stationary. The rotor 6 includes a hollow cylindrical peripheral wall body 62b made of a nonmagnetic material, a rotor shaft 63, and two poles (64a). 64b), permanent magnet 64, core body 62a made of a non-magnetic material, magnetic flux derivative 61, coil springs 66a, 66b, 66c, 66d, and movable bodies 65a, 65b, 65c, 65d made of a high magnetic permeability material. The movable bodies 65a, 65b, 65c, and 65d are drawn from the coil springs 66a, 66b, 66c, and 66d, respectively, and gaps 68a, 68b, 68c, and 68d are generated, and the magnetic poles N and The magnetic flux 67a emitted from 64a is guided to the magnetic flux derivative 64c and escapes from the peripheral wall body 62b, and is guided to the magnetic flux derivative 64d to return to the magnetic poles S and 64b.
図６（ｂ）は、ロータ６が回転する時のロータ６の平面図であり、該ロータ６の前記可動体６５ａ，６５ｂ，６５ｃ，６５ｄは、それぞれ、それぞれに作用する遠心力によって、前記コイルスプリング６６ａ，６６ｂ，６６ｃ，６６ｄから引き離され、前記空隙部６８ａ，６８ｂ，６８ｃ，６８ｄが消失し、永久磁石６４の磁極Ｎ，６４ａから出た磁束６７ｂは、磁束誘導体６４ｃに誘導され、前記可動体６５ｂと、磁束誘導体６１と、前記可動体６５ａを経由して、磁束誘導体６４ｄに誘導され、または、磁束誘導体６４ｃに誘導され、前記可動体６５ｃと、磁束誘導体６１と、前記可動体６５ｄを経由して、磁束誘導体６４ｄに誘導され、磁極Ｓ，６４ｂに戻り、また、永久磁石６４の磁極Ｎ，６４ａから出た磁束６７ｃは、磁束誘導体６４ｃに誘導され周壁体６２ｂを抜け出し、磁束誘導体６４ｄに誘導され、磁極Ｓ，６４ｂに戻り、ロータ６が回転する時の該磁束６７ｃは、ロータ６の静止する時の前記磁束６７ａに較べて小さくなる。 FIG. 6B is a plan view of the rotor 6 when the rotor 6 rotates. The movable bodies 65a, 65b, 65c, and 65d of the rotor 6 are each made of the coil by the centrifugal force acting on each of them. The gaps 68a, 68b, 68c, and 68d are removed from the springs 66a, 66b, 66c, and 66d, and the magnetic flux 67b emitted from the magnetic poles N and 64a of the permanent magnet 64 is guided to the magnetic flux derivative 64c and moved. The body 65b, the magnetic flux derivative 61, and the movable body 65a are guided to the magnetic flux derivative 64d, or are guided to the magnetic flux derivative 64c, and the movable body 65c, the magnetic flux derivative 61, and the movable body 65d are The magnetic flux 67c is guided to the magnetic flux derivative 64d and returned to the magnetic poles S and 64b, and the magnetic flux 67c emitted from the magnetic poles N and 64a of the permanent magnet 64 is 4c is guided out of the peripheral wall 62b, guided to the magnetic flux derivative 64d, returned to the magnetic poles S and 64b, and the magnetic flux 67c when the rotor 6 rotates is smaller than the magnetic flux 67a when the rotor 6 is stationary. Become.
また、図７に、従来の第２の永久磁石磁束弱め機構を設けたロータを有する埋込磁石同期モータのロータの動作説明図を示す。図７（ａ）は、ロータ７が静止する時のロータ７の平面図であり、該ロータ７は、非磁性材料からなる中空筒状の周壁体７２と、ロータ軸７３と、２極（７４ａ，７４ｂ）の永久磁石７４と、非磁性材料からなる芯体７１と、空隙部７６ａに封入された磁性流体７５ａと、空隙部７６ｂに封入された磁性流体７５ｂを有し、永久磁石７４の磁極Ｎ，７４ａから出た磁束７７ａは、磁性流体７５ａに誘導され周壁体７２を抜け出し、磁性流体７５ｂに誘導されて磁極Ｓ，７４ｂに戻る。 FIG. 7 shows an operation explanatory diagram of a rotor of an embedded magnet synchronous motor having a rotor provided with a conventional second permanent magnet magnetic flux weakening mechanism. FIG. 7A is a plan view of the rotor 7 when the rotor 7 is stationary. The rotor 7 includes a hollow cylindrical peripheral wall body 72 made of a nonmagnetic material, a rotor shaft 73, and two poles (74a). 74b), a core 71 made of a nonmagnetic material, a magnetic fluid 75a sealed in the gap 76a, and a magnetic fluid 75b sealed in the gap 76b. The magnetic flux 77a emitted from N, 74a is guided by the magnetic fluid 75a and escapes from the peripheral wall 72, and is guided by the magnetic fluid 75b to return to the magnetic poles S and 74b.
図７（ｂ）は、ロータ７が回転する時のロータ７の平面図であり、該ロータ７の前記磁性流体７５ａと７５ｂはそれぞれ、それぞれに作用する遠心力によって、前記周壁体７２側に押し付けられ、永久磁石７４のそれぞれの磁極Ｎ，７４ａと磁極Ｓ，７４ｂから引き離され、空隙部７６ｃ，７６ｄが生じ、永久磁石７４の磁極Ｎ，７４ａから出た磁束７７ｂは、空隙部７６ｃと、磁性流体７５ａとから周壁体７２を抜け出し、磁性流体７５ｂと空隙７６ｄを経由して、磁極Ｓ，７４ｂに戻るので、該磁束７７ｂは、前記磁束７７ａに較べて小さくなる。
従来の埋込磁石同期モータでは、該埋込磁石同期モータの誘起電圧Ｖｏには制限値Ｖｏｍがあった（非特許文献１参照）。それを数１に示す。 In the conventional embedded magnet synchronous motor, the induced voltage V o of the embedded magnet synchronous motor has a limit value V om (see Non-Patent Document 1). This is shown in Equation 1.
数１において、ωは該埋込磁石同期モータの電気角速度、ｉｄ，ｉｑは回転座標軸ｄ，ｑ電流、Ｌｄ，Ｌｑは各軸のインダクタンス、Φａは電機子鎖交磁束である。 In Equation 1, ω is an electrical angular velocity of the embedded magnet synchronous motor, i d and i q are rotational coordinate axes d and q current, L d and L q are inductances of respective axes, and Φ a is an armature interlinkage magnetic flux. .
電気各速度ωにおいて、制限値Ｖｏｍを下げるには、負のｉｄ電流を流す弱め磁束制御を行う必要があり、ｉｄ電流による銅損が避けられないものであった。 In electrical each speed omega, the lower the limit value V om, it is necessary to perform the flux-weakening control flow negative i d current was achieved, the copper loss by i d current is unavoidable.
従来の第１の永久磁石磁束弱め機構を設けたロータを有する埋込磁石同期モータでは、ロータ６が回転する時の磁束６７ｃが、ロータ６が静止する時の磁束６７ａに較べ小さくなり、電機子鎖交磁束Φａを小さくできるので、負のｉｄ電流を流す弱め磁束制御を行うことなく、制限値Ｖｏｍを下げることができ、回転速度を高められる効果があった。 In a conventional embedded magnet synchronous motor having a rotor provided with a first permanent magnet magnetic flux weakening mechanism, the magnetic flux 67c when the rotor 6 rotates is smaller than the magnetic flux 67a when the rotor 6 is stationary, and the armature since the flux linkage [Phi a can be reduced, without performing flux-weakening control flow negative i d current, it is possible to lower the limit value V om, it had the effect of increased rotational speed.
同様に、従来の第２の永久磁石磁束弱め機構を設けたロータを有する埋込磁石同期モータでは、ロータ７が回転する時の磁束７７ｂが、ロータ７が静止する時の磁束７７ａに較べ小さくなり、電機子鎖交磁束Φａを小さくできるので、負のｉｄ電流を流す弱め磁束制御を行うことなく、制限値Ｖｏｍを下げることができ、回転速度を高められる効果があった。 Similarly, in an embedded magnet synchronous motor having a rotor provided with a conventional second permanent magnet magnetic flux weakening mechanism, the magnetic flux 77b when the rotor 7 rotates is smaller than the magnetic flux 77a when the rotor 7 is stationary. since the armature flux linkage [Phi a can be reduced, without performing flux-weakening control flow negative i d current, it is possible to lower the limit value V om, had the effect of increased rotational speed.
しかしながら、従来の第１の永久磁石磁束弱め機構を設けたロータを有する埋込磁石同期モータにおいて、該ロータ６が回転すると、前記可動体６５ａ，６５ｂ，６５ｃ，６５ｄが移動するが、また、同様に、従来の第２の永久磁石磁束弱め機構を設けたロータを有する埋込磁石同期モータにおいては、該ロータ７が回転すると、磁性流体７５ａ，７５ｂが移動するが、前記ロータ６または７に急加速の回転もしくは急減速の回転を要求した場合には、前記可動体６５ａ，６５ｂ，６５ｃ，６５ｄまたは磁性流体７５ａ，７５ｂは急加速の回転もしくは、急減速の回転の要求に応じてすぐに、移動し、静止することはできないという難点があった、つまり、応答性に難点があった。 However, in the conventional embedded magnet synchronous motor having a rotor provided with the first permanent magnet magnetic flux weakening mechanism, when the rotor 6 rotates, the movable bodies 65a, 65b, 65c, and 65d move. In addition, in a conventional embedded magnet synchronous motor having a rotor provided with a second permanent magnet magnetic flux weakening mechanism, when the rotor 7 rotates, the magnetic fluids 75a and 75b move, but the rotor 6 or 7 suddenly moves. When the rotation of acceleration or the rotation of rapid deceleration is requested, the movable bodies 65a, 65b, 65c, 65d or the magnetic fluids 75a, 75b immediately respond to the request for rotation of rapid acceleration or rotation of rapid deceleration. There was a difficulty that it could not move and stop, that is, there was a difficulty in responsiveness.
ステータと、該ステータに巻回された駆動コイルと、該ステータとギャップを介した、永久磁石が埋込まれたロータと、該駆動コイルを含むモータ駆動回路を有し、該埋込磁石同期モータは無線で電力と情報を送受信する電力情報送受信回路を有し、前記ロータに、前記永久磁石の磁束を弱めるために、該情報に基づいて励磁される永久磁石磁束弱めコイルを設け、前記永久磁石磁束弱めコイルは、前記永久磁石が埋込まれる溝の両端に設けられた磁束短絡防止用穴に巻回され、電力情報送受信回路は、第１電子回路と第２電子回路からなり、ステータは、モータ駆動回路と第１電子回路からなる第１電子基板を有し、ロータは、第２電子回路と、永久磁石磁束弱めコイル励磁コントローラと、前記永久磁石磁束弱めコイルに接続する永久磁石磁束弱めコイルドライバからなる永久磁石磁束弱めコイルドライバ回路と、前記永久磁石磁束弱めコイルからなる第２電子基板を有する埋込磁石同期モータにおいて、第１電子回路は、第１パワーオンリセット回路と、１次コイルと、第１送受信スイッチと、該第１送受信スイッチを介して該１次コイルに接続される、第１送信器と第１受信器と、外部電源用の１次電源端子からなり、第２電子回路は、第２パワーオンリセット回路と、該１次コイルと電磁結合する２次コイルと、第２送受信スイッチと、該第２送受信スイッチを介して該２次コイルに接続される第２送信器と第２受信器と、該２次コイルに接続するダイオード全波整流器と平滑コンデンサと、該平滑コンデンサに接続する充電制御器と２次電源と該２次電源の出力する出力電圧を前記永久磁石磁束弱めコイルの定格電圧へレギュレートするレギュレータとからなる充電回路からなる。 A stator, a wound drive coil on the stator, through the stator and the gap, possess a rotor in which a permanent magnet is embedded, the motor drive circuit including the drive coil,該埋write magnet synchronous motor has a power information transmission and reception circuit for transmitting and receiving power and data wirelessly to the rotor, in order to weaken the magnetic flux of the permanent magnets, it provided the permanent magnet flux weakening coil is energized on the basis of the information, the permanent magnet The magnetic flux weakening coil is wound around a magnetic flux short-circuit prevention hole provided at both ends of the groove in which the permanent magnet is embedded. The power information transmitting / receiving circuit is composed of a first electronic circuit and a second electronic circuit. The rotor has a first electronic board composed of a motor drive circuit and a first electronic circuit, and the rotor has a second electronic circuit, a permanent magnet magnetic flux weakening coil excitation controller, and a permanent magnet connected to the permanent magnet magnetic flux weakening coil. And the permanent magnet flux weakening coil driver circuit comprising a coil driver flux weakening, in an interior permanent magnet synchronous motor having a second electronic board consisting of the permanent magnet flux weakening coil, the first electronic circuit includes a first power-on reset circuit, A primary coil, a first transmission / reception switch, a first transmitter and a first receiver connected to the primary coil via the first transmission / reception switch, and a primary power supply terminal for an external power source; The second electronic circuit includes a second power-on reset circuit, a secondary coil electromagnetically coupled to the primary coil, a second transmission / reception switch, and a second coil connected to the secondary coil via the second transmission / reception switch. Two transmitters, a second receiver, a diode full-wave rectifier connected to the secondary coil, a smoothing capacitor, a charge controller connected to the smoothing capacitor, a secondary power source, and an output from the secondary power source. Consisting charging circuit comprising a voltage from a regulator that regulates the voltage rating of the permanent magnet flux weakening coil.
１次電源端子に外部電源が印加されると、第１パワーオンリセット回路は、モータ駆動回路をオンし、埋込磁石同期モータを起動し、第１パワーオン信号を第１送受信スイッチと第１送信器と第１受信器に出力し、該第１送受信スイッチは、１次コイルを該第１送信器に接続し、該第１送信器は該１次コイルに電力用高周波電圧の印加を開始し、第２パワーオンリセット回路は、２次コイルに誘起する電力用高周波電圧を検出すると、第２パワーオン信号を第２送受信スイッチと、第２送信器と、第２受信器と、レギュレータと、永久磁石磁束弱めコイル励磁コントローラへ出力し、また、２次電源は充電を開始する。 When external power is applied to the primary power supply terminal, the first power-on reset circuit turns on the motor drive circuit, activates the embedded magnet synchronous motor, and sends the first power-on signal to the first transmission / reception switch and the first transmission / reception switch. The first transmitter / receiver switch connects the primary coil to the first transmitter, and the first transmitter starts applying a high-frequency voltage for power to the primary coil. The second power-on reset circuit detects the power high-frequency voltage induced in the secondary coil, and sends the second power-on signal to the second transmission / reception switch, the second transmitter, the second receiver, the regulator, The permanent magnet magnetic flux weakening is output to the coil excitation controller, and the secondary power supply starts charging .
その後、第１送信器は１次コイルへの電力用高周波電圧の印加を一時停止し、モータ回転数の情報を含む情報用高周波電圧を送信して、その送信を停止し、その直後に、第２送信器は、２次電源の出力電圧の情報を含む情報用高周波電圧を送信し、その後は、第１送信器による電力用高周波電圧と情報用高周波電圧の送信と、第２送信器による情報用高周波電圧の送信の、一連の送信が繰り返し行われる。 Thereafter, the first transmitter temporarily stops the application of the power high-frequency voltage to the primary coil, transmits the information high-frequency voltage including information on the motor rotation speed, stops the transmission, and immediately after that, The two transmitters transmit an information high-frequency voltage including information on the output voltage of the secondary power supply, and thereafter transmit the power high-frequency voltage and the information high-frequency voltage by the first transmitter, and the information by the second transmitter. A series of transmissions of the high-frequency voltage for use is repeated.
２次電源の出力電圧が第１電圧レベルを超え、また、モータ回転数が所定値を越えると、第２受信器は、永久磁石磁束弱めコイル励磁コントローラをオンし、永久磁石弱めコイルドライバは、永久磁石磁束弱めコイルに永久磁石磁束を弱めるために、励磁電流を供給し、第２送信器は、２次電源の出力電圧が第２電圧レベルを超えると、第１送信器に、その電力用高周波電圧の送信の停止の継続を指示するために、電力送信停止継続高周波電圧を送信し、また、２次電源の出力電圧が第１電圧レベルを切ると、第１送信器にその電力高周波電圧の送信の再開を指示するために、電力送信再開高周波電圧を送信する。 When the output voltage of the secondary power source exceeds the first voltage level and the motor rotation speed exceeds a predetermined value, the second receiver turns on the permanent magnet flux weakening coil excitation controller, and the permanent magnet weakening coil driver In order to weaken the permanent magnet magnetic flux to the permanent magnet magnetic flux weakening coil, an excitation current is supplied, and when the output voltage of the secondary power source exceeds the second voltage level, the second transmitter sends the power to the first transmitter. In order to instruct the continuation of the stop of the transmission of the high-frequency voltage, the power transmission stop-continuation high-frequency voltage is transmitted, and when the output voltage of the secondary power source falls below the first voltage level, the power high-frequency voltage is sent to the first transmitter. In order to instruct the resumption of the transmission, the power transmission resumption high-frequency voltage is transmitted.
外部電源が遮断されると、第１パワーオンリセット回路は、第１送信器に外部電源の遮断情報信号を出力し、該第１送信器はただちに、電力用高周波電圧の送信を停止し、その直後に、外部電源が遮断されたとの情報を含む情報用高周波電圧を送信し、第１パワーオンリセット回路は、モータ駆動回路をオフし、第１パワーオフ信号を第１送受信スイッチと、第１送信器と、第１受信器へ出力し、第２送受信スイッチは第２受信器を接続し、第２受信器は、該情報用高周波電圧を受信し、外部電源が遮断されたとの情報の信号を第２パワーオンリセット回路へ出力し、該第２パワーオンリセット回路は、第２パワーオフ信号を第２送受信スイッチと、第２送信器と、第２受信器と、レギュレータと、永久磁石磁束弱め励磁コントローラへ出力し、永久磁石磁束弱めコイルドライバは、永久磁石磁束弱めコイルへの励磁電流の供給を停止する。 When the external power supply is cut off, the first power-on reset circuit outputs an external power supply cutoff information signal to the first transmitter, and the first transmitter immediately stops the transmission of the high frequency voltage for power, Immediately after, an information high-frequency voltage including information that the external power supply has been shut off is transmitted, the first power-on reset circuit turns off the motor drive circuit, and sends the first power-off signal to the first transmission / reception switch, Output to the transmitter and the first receiver, the second transmission / reception switch connects the second receiver, the second receiver receives the information high-frequency voltage, and the information signal that the external power supply is shut off Is output to the second power-on reset circuit, and the second power-on reset circuit outputs the second power-off signal to the second transmission / reception switch, the second transmitter, the second receiver, the regulator, and the permanent magnet magnetic flux. Output to weak excitation controller , Coil driver weakening permanent magnet flux stops supplying the excitation current to the permanent magnet flux weakening coil.
本発明は、永久磁石磁束弱めコイルに励磁電流を供給することによって、ロータとステータ間のギャップを介さずに、直に、永久磁石磁束を弱めることができるので、負の小さなｉｄ電流を流す弱め磁束制御を併用することによって、前記制限値Ｖｏｍを小さくできる。 The present invention, by supplying an exciting current to the permanent magnet flux weakening coils, not through the gap between the rotor and the stator, directly, it is possible to weaken the permanent magnet flux flows negative small i d current By using the flux weakening control together, the limit value V om can be reduced.
その結果、高速回転領域を広げられる効果がある。 As a result, there is an effect that the high-speed rotation region can be expanded.
以下、本発明の実施の形態を図面に基づいて詳述する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１に、本発明の埋込磁石同期モータのロータとステータの平面図を示す。該本発明の埋込磁石同期モータ１は、ロータシャフト１１ａと、鉄心１１ｂと、該鉄心１１ｂに正方形に埋め込まれた、全体の極対数が２となる永久磁石１３ａ，１３ｂ，１３ｃ，１３ｄを有するロータ１１と、該ロータ１１とギャップ１９を介した、駆動コイル（図示せず）が巻回されたスロット１２ａを有するステータ１２を有し、該ロータ１１には、前記永久磁石１３ａのために磁束短絡防止用穴１５ａ，１５ｂ、同様に、前記永久磁石１３ｂのために磁束短絡防止用穴１６ａ，１６ｂ、また、同様に、前記永久磁石１３ｃのために磁束短絡防止用穴１７ａ，１７ｂ、さらに、同様に、前記永久磁石１３ｄのために磁束短絡防止用穴１８ａ，１８ｂが設けられ、永久磁石磁束弱めコイル１４ａは、磁束短絡防止用穴１５ａ，１５ｂに巻回され、永久磁石磁束弱めコイル１４ｂは、磁束短絡防止用穴１６ａ，１６ｂに巻回され、永久磁石磁束弱めコイル１４ｃは、磁束短絡防止用穴１７ａ，１７ｂに巻回され、永久磁石磁束弱めコイル１４ｄは、磁束短絡防止用穴１８ａ，１８ｂに巻回されている。 FIG. 1 is a plan view of a rotor and a stator of an embedded magnet synchronous motor according to the present invention. The embedded magnet synchronous motor 1 of the present invention has a rotor shaft 11a, an iron core 11b, and permanent magnets 13a, 13b, 13c, 13d embedded in a square in the iron core 11b and having a total number of pole pairs of 2. The rotor 11 has a stator 12 having a slot 12a around which a drive coil (not shown) is wound, and the rotor 11 and a gap 19 are interposed between the rotor 11 and the rotor 11. The rotor 11 has a magnetic flux for the permanent magnet 13a. Short-circuit prevention holes 15a and 15b, similarly, magnetic flux short-circuit prevention holes 16a and 16b for the permanent magnet 13b, and similarly magnetic flux short-circuit prevention holes 17a and 17b for the permanent magnet 13c, Similarly, magnetic flux short-circuit prevention holes 18a and 18b are provided for the permanent magnet 13d, and the permanent magnet magnetic flux weakening coil 14a is wound around the magnetic flux short-circuit prevention holes 15a and 15b. The permanent magnet magnetic flux weakening coil 14b is wound around the magnetic flux short-circuit prevention holes 16a and 16b, and the permanent magnet magnetic flux weakening coil 14c is wound around the magnetic flux short-circuit prevention holes 17a and 17b, and the permanent magnet magnetic flux weakening coil 14d. Are wound around the magnetic flux short-circuit prevention holes 18a and 18b.
次に、図２に、本発明の埋込磁石同期モータの側面透視図を示す。本発明の埋込磁石同期モータ２は、軸受け２９ａ，２９ｂに受けられたロータ軸２１ａを有するロータ２１と、スロット（図示せず）に巻回された駆動コイル２８ａ，２８ｂ，２８ｃを有するステータヨーク２２ａから成るステータ２２を有し、該ロータシャフト２１ａの先端２１ｂに固定され、第２電子回路用ＩＣ，２６ａと、図１に示す、前記永久磁石磁束弱めコイル１４ａ，１４ｂ，１４ｃ，１４ｄの端子ワイヤー２３（該端子ワイヤー２３は、軸受２９ｂを避けるために、ロータシャフト２１ａに空けられた、内面に絶縁コーティングが施されたワイヤー用トンネル２１ｃに通されている）を接続した、永久磁石磁束弱めコイルドライバ回路用ＩＣ，２６ｂを実装し、リチウムイオン２次電池２７とリング形状でその軸がロータシャフト２１ａの長さ方向にあり、ロータシャフト２１ａの先端２１ｂがその内側にかからないようにロータシャフト２１ａから離して配置された２次コイル２６ｃと該２次コイル２６ｃの発生する磁束の磁路として機能する（磁束がロータシャフト２１ａ，軸受２９ｂ，リチウムイオン２次電池２７あるいはステータヨーク２２ａに漏れてうず電流損失を生ずることをさけるため）、特にうず電流損失を抑えるためにＮｉＺｎフェライトのバルク材あるいはＦｅ系軟磁性薄板やアモルファス薄板を電気的絶縁膜を介して積層した積層材から成る、該２次コイル２６ｃの２次コイル用コア２６ｄと２次コイル用バックプレート２６ｅを搭載した第２回路基板２６と、ステータ２２に固定され、前記２次コイル２６ｃと磁気結合する、リング形状でその軸がロータシャフト２１ａ方向にあり、ロータシャフト２１ａの先端２１ｂがその内側にかからないようにロータシャフト２１ａから離して配置された１次コイル２５ｂと該１次コイル２５ｂの発生する磁束の磁路として機能する（磁束がロータシャフト２１ａ，軸受２９ｂ，リチウムイオン２次電池２７あるいはステータヨーク２２ａに漏れてうず電流損失を生ずることをさけるため）、同様に、特にうず電流損失を抑えるためにＮｉＺｎフェライトのバルク材あるいはＦｅ系軟磁性薄板やアモルファス薄板を電気的絶縁膜を介して積層した積層材から成る、該１次コイル２５ｂの１次コイル用コイルコア２５ｃと１次コイル用バックプレート２５ｄと、モータ駆動回路と第１電子回路用ＩＣ，２５ａを実装した第１回路基板２５と該第１回路基板２５の外部電源用の１次電源端子２４ａ，２４ｂから構成されている。 Next, FIG. 2 shows a side perspective view of the embedded magnet synchronous motor of the present invention. The embedded magnet synchronous motor 2 of the present invention includes a rotor 21 having a rotor shaft 21a received by bearings 29a and 29b, and a stator yoke having drive coils 28a, 28b and 28c wound around slots (not shown). And a second electronic circuit IC 26a, and terminals of the permanent magnet magnetic flux weakening coils 14a, 14b, 14c, 14d shown in FIG. 1 having a stator 22 made of 22a, fixed to the tip 21b of the rotor shaft 21a. Permanent magnet magnetic flux weakening connected to a wire 23 (the terminal wire 23 is passed through a wire tunnel 21c having an inner surface coated with an insulating coating) formed in the rotor shaft 21a to avoid the bearing 29b. IC for coil driver circuit, 26b is mounted, lithium ion secondary battery 27 and ring shape, and its axis is rotary The secondary coil 26c is located in the longitudinal direction of the rotor shaft 21a and is arranged away from the rotor shaft 21a so that the tip 21b of the rotor shaft 21a does not go inside thereof, and functions as a magnetic path of magnetic flux generated by the secondary coil 26c. (In order to prevent the magnetic flux from leaking to the rotor shaft 21a, the bearing 29b, the lithium ion secondary battery 27 or the stator yoke 22a to cause eddy current loss), in order to suppress the eddy current loss, the bulk material of NiZn ferrite or Fe A second circuit board 26 mounted with a secondary coil core 26d and a secondary coil back plate 26e of the secondary coil 26c, which is made of a laminated material obtained by laminating a series soft magnetic thin plate or an amorphous thin plate through an electrical insulating film. And a ring shape fixed to the stator 22 and magnetically coupled to the secondary coil 26c. As a magnetic path of a magnetic flux generated by the primary coil 25b and the primary coil 25b arranged away from the rotor shaft 21a so that the tip 21b of the rotor shaft 21a is not inward of the rotor shaft 21a. Similarly, in order to prevent eddy current loss by preventing the magnetic flux from leaking to the rotor shaft 21a, the bearing 29b, the lithium ion secondary battery 27 or the stator yoke 22a, especially in order to suppress the eddy current loss, A coil core 25c for the primary coil and a back plate 25d for the primary coil of the primary coil 25b, which are made of a laminated material in which a bulk material, an Fe-based soft magnetic thin plate or an amorphous thin plate is laminated via an electrical insulating film, and a motor drive A first circuit board 25 on which the circuit and the first electronic circuit IC 25a are mounted; The circuit board 25 is composed of primary power supply terminals 24a and 24b for external power supply.
次に、第１電子回路と第２電子回路からなる、無線で電力と情報を送受信する電力情報送受信回路と、永久磁石磁束弱めコイルドライバ回路と、永久磁石磁束弱めコイルの第１の実施の形態の動作を、図３に示す、本発明の回路ブロック図と、図４に示す、外部電源用の１次電源端子間電圧の時間変化（ａ），第１送信器の送信する高周波電圧の時間変化（ｂ），第１受信器の受信する高周波電圧の時間変化（ｃ），２次コイルの誘起電圧の時間変化（ｄ），第２送信器の送信する高周波電圧の時間変化（ｅ），第２受信器の受信する高周波電圧の時間変化（ｆ）と永久磁石磁束弱めコイル励磁コントローラに入力する励磁オンオフ電圧の時間変化（ｇ）の本発明の、第１の埋込磁石同期モータの駆動タイムチャートと、図５に示す、本発明の埋込磁石同期モータの駆動フローチャートを使って説明する。 Next, a first embodiment of a power information transmitting / receiving circuit that wirelessly transmits and receives power and information, a permanent magnet magnetic flux weakening coil driver circuit, and a permanent magnet magnetic flux weakening coil, which includes a first electronic circuit and a second electronic circuit. 3 is the circuit block diagram of the present invention shown in FIG. 3 and the time variation (a) of the voltage between the primary power supply terminals for the external power supply shown in FIG. 4, the time of the high frequency voltage transmitted by the first transmitter. Change (b), time change (c) of the high frequency voltage received by the first receiver, time change (d) of the induced voltage of the secondary coil, time change (e) of the high frequency voltage transmitted by the second transmitter, Driving the first embedded magnet synchronous motor of the present invention of the time change (f) of the high-frequency voltage received by the second receiver and the time change (g) of the excitation on / off voltage input to the permanent magnet flux weakening coil excitation controller. Time chart and the present invention shown in FIG. Use the driving flow of the embedded magnet synchronous motor is described.
図３に示す、本発明の回路ブロック図で、図４に示す、本発明の、第１の埋込磁石同期モータの駆動タイムチャートの図４（ａ）のように、前記１次電源端子３４ａ（２４ａ）と前記１次電源端子３４ｂ（２４ｂ）間に外部電源電圧４１が印加されると、第１電子回路３１を構成する、第１パワーオンリセット回路３１ａは、第１送信器３１ｂと第１受信器３１ｃと第１送受信スイッチ３１ｄに第１パワーオン信号を出力し（Ｓ１）、該第１送受信スイッチ３１ｄは該第１送信器３１ｂと１次コンデンサ３５ｂと直列に接続した１次コイル３５ａを接続し、該第１送信器３１ｂは、１次コイル３５ａに、共振周波数ｆ（共振周波数ｆは、１次コイル３５ａと２次コイル３６ａ間の伝送効率を考慮して、１次コイル３５ａ及び２次コイル３６ａに誘起される起電圧は周波数に比例するので、１０ｋＨｚより低くても、起電圧は小さくなるが、数１０ｋＨｚより大きくなると、うず電流損失が周波数の2乗に比例して大きくなるので、１０ｋＨｚ〜数１０ｋＨｚが好ましい）に設定された電力用高周波電圧４２の印加を開始し（Ｓ２）、第２電子回路３２を構成する、２次コンデンサ３６ｂと直列に接続して１次コイル３５ａと同一の共振周波数ｆに設定された２次コイル３６ａには、図４（ｄ）に示す、前記電力用高周波電圧４２に対応する電力用高周波電圧４４が誘起し、該電力用高周波電圧４４はダイオード全波整流器３２ｄで全波整流され、まず、該ダイオード全波整流器３２ｄに接続する平滑コンデンサ３２ｅで平滑され、該平滑コンデンサ３２ｅに接続する、充電回路３７の充電制御器３７ａによって、リチウムイオン２次電池３７ｂに充電される（Ｓ３）。 FIG. 4 is a circuit block diagram of the present invention. As shown in FIG. 4A of the drive time chart of the first embedded magnet synchronous motor of the present invention shown in FIG. When an external power supply voltage 41 is applied between (24a) and the primary power supply terminal 34b (24b), the first power-on reset circuit 31a constituting the first electronic circuit 31 is connected to the first transmitter 31b and the first power supply terminal 34b (24b). A first power-on signal is output to the first receiver 31c and the first transmission / reception switch 31d (S1), and the first transmission / reception switch 31d is connected to the first transmitter 31b and the primary capacitor 35b in series with a primary coil 35a. The first transmitter 31b is connected to the primary coil 35a at the resonance frequency f (the resonance frequency f is determined by considering the transmission efficiency between the primary coil 35a and the secondary coil 36a and the primary coil 35a). Secondary coil 36a Since the induced voltage is proportional to the frequency, the voltage is smaller even if the frequency is lower than 10 kHz. However, if the voltage is larger than several tens of kHz, the eddy current loss increases in proportion to the square of the frequency. Application of the high frequency power voltage 42 set to 10 kHz is preferable (S2), and the same resonance frequency as that of the primary coil 35a is connected in series with the secondary capacitor 36b constituting the second electronic circuit 32. The power high-frequency voltage 44 corresponding to the power high-frequency voltage 42 shown in FIG. 4D is induced in the secondary coil 36a set to f, and the power high-frequency voltage 44 is converted into a diode full-wave rectifier 32d. Of the charging circuit 37 which is first smoothed by a smoothing capacitor 32e connected to the diode full-wave rectifier 32d and connected to the smoothing capacitor 32e. The charge control unit 37a, is charged to the lithium ion secondary battery 37b (S3).
一方、第２パワーオンリセット回路３２ａは、図４（ｄ）に示す、２次コイル３６ａに誘起する前記電力用高周波電圧４４を検出すると、第２パワーオン信号を、第２送受信スイッチ３２ｆと、第２送信器３２ｂと、第２受信器３２ｃと、リチウムイオン２次電池３７ｂの出力を定格電圧にレギュレートするレギュレータ３７ｃと、該レギュレータ３７ｃに接続する永久磁石磁束弱めコイルドライバ回路３８の永久磁石磁束弱めコイル励磁コントローラ３８ａへ出力し、前記送受信スイッチ３２ｆは、リチウムイオン２次電池３７ｂの出力電圧をモニターし、まず、該リチウムイオン２次電池３７ｂの出力電圧が第１電圧レベル（例えば、レギュレータ３７ｃが出力する電圧が並列接続の永久磁石磁束弱めコイル３３ａ，３３ｂ，３３ｃ、３３ｄ（本発明では、同一励磁電流の場合、並列接続では、直列接続に較べ励磁電圧が１／４となるので、並列接続を採用した）を励磁するために必要な定格電圧の最低電圧となる前記リチウムイオン２次電池３７ｂの出力電圧を第１電圧レベルに設定する。）を越えているかを確認する（Ｓ４）。 On the other hand, when the second power-on reset circuit 32a detects the power high-frequency voltage 44 induced in the secondary coil 36a shown in FIG. 4D, the second power-on reset circuit 32a sends the second power-on signal to the second transmission / reception switch 32f, The second transmitter 32b, the second receiver 32c, the regulator 37c that regulates the output of the lithium ion secondary battery 37b to the rated voltage, and the permanent magnet of the permanent magnet magnetic flux weakening coil driver circuit 38 connected to the regulator 37c The transmission / reception switch 32f monitors the output voltage of the lithium ion secondary battery 37b. First, the output voltage of the lithium ion secondary battery 37b is set to a first voltage level (for example, a regulator). The voltage output by 37c is a permanent magnet flux weakening coil 33a, 33b, 33c, 3c connected in parallel. In the present invention, in the case of the same excitation current, the parallel voltage is the lowest voltage of the rated voltage required for exciting the parallel connection because the excitation voltage is 1/4 compared to the serial connection. Whether the output voltage of the lithium ion secondary battery 37b is set to the first voltage level is checked (S4).
次に、図４（ｂ）に示す時間ｔ１後に、前記第１送信器３１ｂは、前記１次コイル３５ａに電力用高周波電圧４２を印加する送信を一時停止し（Ｓ５）、その後、時間ｔ２の間に、該電力用高周波電圧４２に較べ振幅の小さく、前記埋込磁石同期モータ１のモータ回転数の情報を含む情報用高周波電圧４２ａを送信し（Ｓ６）、前記第２送受信スイッチ３２ｆは該電力用高周波電圧４２から該情報用高周波電圧４２ａに変化したことを検出して、前記第２受信器３２ｃを接続し、該第２受信器３２ｃは該情報用高周波電圧４２ａに対応する、図４（ｆ）に示す、情報用高周波電圧４６を受信し（Ｓ６）、該情報用高周波電圧４６から前記モータ回転数の情報を取得し、モータ回転数が所定値を越えていると、モータ回転数が所定値を越えたとの信号を永久磁石磁束弱めコイル励磁コントローラ３８ａに出力し、該永久磁石磁束弱めコイル励磁コントローラ３８ａは前記永久磁石磁束弱めコイルドライバ３８ｂをオンし、その後、前記第１送信器３１ｂは、前記情報用高周波電圧４２ａの送信を停止し、前記第２送受信スイッチ３２ｆは、前記リチウムイオン２次電池３７ｂの出力が前記第１電圧レベルに達したが、第２電圧レベルには達していないことを確認し、前記第２送信器３２ｃに接続して、該第２送信器３２ｃは、前記リチウムイオン２次電池３７ｂの出力の情報（今のところ、リチウムイオン２次電池３７ｂの出力は、前記第１電圧レベルより大きい第２電圧レベル（図２に示す、埋込磁石同期モータ２に外部電源が繰り返し、印加、切断されても、リチウムイオン２次電池３７ｂが満充電圧を超えることがないように、例えば、該満充電圧より若干少ない電圧を第２電圧レベルに設定する。）に達していない。）を含む情報用高周波電圧４５を送信する（Ｓ７）。 Next, after time t1 shown in FIG. 4B, the first transmitter 31b temporarily stops transmission of applying the power high-frequency voltage 42 to the primary coil 35a (S5), and then at time t2. In the meantime, an information high-frequency voltage 42a having a smaller amplitude than the power high-frequency voltage 42 and including information on the rotational speed of the embedded magnet synchronous motor 1 is transmitted (S6), and the second transmission / reception switch 32f Detecting a change from the power high-frequency voltage 42 to the information high-frequency voltage 42a, the second receiver 32c is connected, and the second receiver 32c corresponds to the information high-frequency voltage 42a. When the information high-frequency voltage 46 shown in (f) is received (S6), information on the motor rotation speed is obtained from the information high-frequency voltage 46 , and the motor rotation speed exceeds a predetermined value, the motor rotation speed is obtained. When exceeds the predetermined value A signal is output to the permanent magnet flux weakening coil excitation controller 38a, the permanent magnet flux weakening coil excitation controller 38a turns on the permanent magnet flux weakening coil driver 38b, and then the first transmitter 31b The transmission of the voltage 42a is stopped, and the second transmission / reception switch 32f confirms that the output of the lithium ion secondary battery 37b has reached the first voltage level but has not reached the second voltage level, The second transmitter 32c is connected to the second transmitter 32c and outputs information on the output of the lithium ion secondary battery 37b (currently, the output of the lithium ion secondary battery 37b is the first voltage level). Even if the external power supply is repeatedly applied and disconnected from the embedded magnet synchronous motor 2 shown in FIG. For example, a voltage slightly lower than the full charge pressure is set to the second voltage level so that the battery 37b does not exceed the full charge pressure. (S7).
次に、第１受信器３１ｃは、情報用高周波電圧４５に対応する情報用高周波電圧４３を受信し（Ｓ７）、その情報をもつ信号を第１送信器へ出力し、該第１送信器３１ｂは電力用高周波電圧４２１の１次コイル３５ａへの印加を再開し（Ｓ８）、時間ｔ３後の時間ｔ４の間、再び、第１送信器３１ｂは電力用高周波電圧４２１の送信を一時停止し（以下、図４において、第１送信器情報送信、第２受信器情報受信と、第２送信器情報送信、第１受信器情報受信の各ステップの表示を省略）、その間、同様に、前記第１送信器３１ｂは、モータ回転数の情報を含む情報用高周波電圧４２１ａを送信し、前記第２送受信スイッチ３２ｆは前記第２受信器３２ｃを接続し、該第２受信器３２ｃは該モータ回転数の情報を取得し、該モータ回転数の情報をもつ信号を永久磁石磁束弱めコイル励磁コントローラ３８ａへ出力し、該永久磁石磁束弱めコイル励磁コントローラ３８ａは、該モータ回転数が所定値を超えているので（Ｓ９，Ｙｅｓ）、前記永久磁石磁束弱めコイルドライバ３８ｂをオンし、該永久磁石磁束弱めコイルドライバ３８ｂは、前記永久磁石磁束弱めコイル３３ａ，３３ｂ，３３ｃ，３３ｄに励磁電流を供給し（Ｓ１０）、その後、前記情報用高周波電圧４２１ａの送信を停止し、前記第２送受信スイッチ３２ｂは前記第２送信器３２ｂに接続し、該第２送信器３２ｂは、前記リチウムイオン２次電池３７ｂの出力の情報を含む情報用高周波電圧４５１を送信し、前記第１送受信スイッチ３１ｄは前記第１受信器３１ｃに接続を切り換え、該第１受信器３１ｃは、該情報用高周波電圧４５１に対応する情報用高周波電圧４３１を受信し、前記リチウムイオン２次電池３７ｂの出力が前記第１電圧レベルに達したが、第２電圧レベルには達していないことを確認する（Ｓ１１，Ｎｏ）。 Next, the first receiver 31c receives the information high-frequency voltage 43 corresponding to the information high-frequency voltage 45 (S7), outputs a signal having the information to the first transmitter, and the first transmitter 31b. Restarts the application of the power high-frequency voltage 421 to the primary coil 35a (S8), and again during the time t4 after the time t3, the first transmitter 31b once again stops transmission of the power high-frequency voltage 421 ( Hereinafter, in FIG. 4, the display of each step of the first transmitter information transmission, the second receiver information reception, the second transmitter information transmission, and the first receiver information reception is omitted). The first transmitter 31b transmits an information high-frequency voltage 421a including information on the motor speed, the second transmission / reception switch 32f connects the second receiver 32c, and the second receiver 32c is connected to the motor speed. Information about the motor rotation speed. Is output to the permanent magnet flux weakening coil excitation controller 38a, and the permanent magnet flux weakening coil excitation controller 38a has the motor rotational speed exceeding a predetermined value (S9, Yes). The coil driver 38b is turned on, and the permanent magnet magnetic flux weakening coil driver 38b supplies an excitation current to the permanent magnet magnetic flux weakening coils 33a, 33b, 33c, 33d (S10), and then transmits the high frequency voltage for information 421a. The second transmission / reception switch 32b is connected to the second transmitter 32b, and the second transmitter 32b transmits an information high-frequency voltage 451 including information on the output of the lithium ion secondary battery 37b. The first transmission / reception switch 31d switches the connection to the first receiver 31c, and the first receiver 31c The information high-frequency voltage 431 corresponding to the frequency voltage 451 is received, and it is confirmed that the output of the lithium ion secondary battery 37b has reached the first voltage level but has not reached the second voltage level (S11). , No).
次に、前記第１送受信スイッチ３１ｄは第１送信器３１ｂを接続し、該第１送信器３１ｂは電力用高周波電圧４２２を送信し、時間ｔ５後に送信を停止し、モータ回転数の情報の情報用高周波電圧４２２ａを送信し、前記第２受信器３２ｃは該モータ回転数の情報を取得し、該モータ回転数の情報をもつ信号を前記永久磁石磁束弱めコイル励磁コントローラ３８ａへ出力し、モータ回転数が所定値を超えているので（Ｓ９，Ｙｅｓ）、該永久磁石磁束弱めコイル励磁コントローラ３８ａは、永久磁石磁束弱めコイルドライバ３８ｂを引き続きオンし、該永久磁石磁束弱めコイルドライバ３８ｂは、永久磁石磁束弱めコイル３３ａ，３３ｂ，３３ｃ，３３ｄに励磁電流を引き続き供給し（Ｓ１０）、その後、情報用高周波電圧４２２ａの送信を停止し、前記第２送信器３２ｂは、リチウムイオン２次電池３７ｂの出力の情報を含む情報用高周波電圧４５２を送信し、前記第１受信器３１ｃは、該情報用高周波電圧４５２に対応する情報用高周波電圧４３２を受信し、リチウムイオン２次電池３７ｂの出力が第２電圧レベルに達したことを確認し、前記第１送信器３１ｂに電力用高周波電圧４２２後の送信を停止させる（Ｓ１２）。 Next, the first transmission / reception switch 31d connects the first transmitter 31b, the first transmitter 31b transmits the high frequency voltage 422 for power, stops transmission after time t5, and information on the information on the motor rotation speed. The high frequency voltage 422a is transmitted, the second receiver 32c obtains information on the motor rotational speed, outputs a signal having the information on the motor rotational speed to the permanent magnet magnetic flux weakening coil excitation controller 38a, and rotates the motor. Since the number exceeds the predetermined value (S9, Yes), the permanent magnet flux weakening coil excitation controller 38a continues to turn on the permanent magnet flux weakening coil driver 38b, and the permanent magnet flux weakening coil driver 38b The exciting current is continuously supplied to the magnetic flux weakening coils 33a, 33b, 33c, and 33d (S10), and then the information high-frequency voltage 422a is transmitted. The second transmitter 32b transmits an information high-frequency voltage 452 including information on the output of the lithium ion secondary battery 37b, and the first receiver 31c receives information corresponding to the information high-frequency voltage 452. The high frequency voltage 432 is received, it is confirmed that the output of the lithium ion secondary battery 37b has reached the second voltage level, and the first transmitter 31b is stopped from transmitting after the high frequency voltage 422 for power (S12). .
時間が経過して、前記第１送信器３１ｂは情報用高周波電圧４２３ａを送信し、その後、前記第２送受信スイッチ３２ｆは第２送信器３２ｂからリチウムイオン２次電池３７ｂの出力が第２電圧レベルを切った（Ｓ１１，Ｎｏ）情報を含む情報用高周波電圧４５３を送信し、その後、前記第１送信器３１ｂは電力用高周波電圧４２３を送信し、時間ｔ６後に、同様に、情報用高周波電圧４２３ｂを送信し、その後、前記第２送信器３２ｂは情報用高周波電圧４５４を送信し、その後、前記第１送信器３１ｂは電力用高周波電圧４２４を送信し、時間ｔ８後に、前記外部電源電圧４１がオフし、前記第１パワーオンリセット回路３１ａは、前記第１送信器３１ｂに第１パワーオフの情報を含む情報用高周波電圧４２４ａを送信させ、その後に、該第１送信器３１ｂ，第１受信器３１ｃ，第１送受信器スイッチ３１ｄへ第１パワーオフ（Ｓ１３，Ｙｅｓ）信号を出力し、時間ｔ９の間、前記第２受信器３２ｃは、情報用高周波電圧４２４ａに対応する、情報用高周波電圧４６５から第１パワーオフの情報を取得し、該第１パワーオフの情報をもつ信号を前記第２パワーオンリセット回路３２ａへ出力し、該第２パワーオンリセット回路３２ａは、第２送受信スイッチ３２ｆと、第２送信器３２ｂと、第２受信器３２ｃと、レギュレータ３７ｃと，永久磁石磁束弱めコイル励磁コントローラ３８ａへ第２パワーオフ信号を出力し、前記永久磁石磁束弱めコイルドライバ３８ｂは、前記永久磁石磁束弱めコイル３３ａ，３３ｂ，３３ｃ，３３ｄへの励磁電流を停止する。 After a lapse of time, the first transmitter 31b transmits the information high-frequency voltage 423a, and then the second transmission / reception switch 32f outputs the output of the lithium ion secondary battery 37b from the second transmitter 32b to the second voltage level. (S11, No) The information high-frequency voltage 453 including the information is transmitted, and then the first transmitter 31b transmits the power high-frequency voltage 423. After time t6, the information high-frequency voltage 423b is also transmitted. Then, the second transmitter 32b transmits the information high-frequency voltage 454, and then the first transmitter 31b transmits the power high-frequency voltage 424. After time t8, the external power supply voltage 41 is The first power-on reset circuit 31a causes the first transmitter 31b to transmit the information high-frequency voltage 424a including the first power-off information, and then The first power-off (S13, Yes) signal is output to the first transmitter 31b, the first receiver 31c, and the first transceiver switch 31d, and during the time t9, the second receiver 32c The first power-off information is obtained from the information high-frequency voltage 465 corresponding to 424a, a signal having the first power-off information is output to the second power-on reset circuit 32a, and the second power-on reset is output. The circuit 32a outputs a second power-off signal to the second transmission / reception switch 32f, the second transmitter 32b, the second receiver 32c, the regulator 37c, and the permanent magnet magnetic flux weakening coil excitation controller 38a. The magnetic flux weakening coil driver 38b stops the excitation current to the permanent magnet magnetic flux weakening coils 33a, 33b, 33c, and 33d.
次に、第１電子回路と第２電子回路からなる、無線で電力と情報を送受信する電力情報送受信回路と、永久磁石磁束弱めコイルドライバ回路と、永久磁石磁束弱めコイルの第２の実施の形態の動作を、図３に示す、本発明の回路ブロック図と、第１送信器が停止状態にある時に、外部電源が遮断された場合の図１０に示す、外部電源用の１次電源端子間電圧の時間変化（ａ），第１送信器の送信する高周波電圧の時間変化（ｂ），第１受信器の受信する高周波電圧の時間変化（ｃ），２次コイルの誘起電圧の時間変化（ｄ），第２送信器の送信する高周波電圧の時間変化（ｅ），第２受信器の受信する高周波電圧の時間変化（ｆ）と永久磁石磁束弱めコイル励磁コントローラに入力する励磁オンオフ電圧の時間変化（ｇ）の本発明の、第２の埋込磁石同期モータの駆動タイムチャートと、図５に示す、本発明の埋込磁石同期モータの駆動フローチャートを使って説明する。 Next, a second embodiment of a power information transmitting / receiving circuit which wirelessly transmits and receives power and information, a permanent magnet magnetic flux weakening coil driver circuit, and a permanent magnet magnetic flux weakening coil, which includes a first electronic circuit and a second electronic circuit. 3 is a circuit block diagram of the present invention shown in FIG. 3 and between the primary power supply terminals for the external power supply shown in FIG. 10 when the external power supply is cut off when the first transmitter is in a stopped state. Time variation of voltage (a), time variation of high-frequency voltage transmitted by first transmitter (b), time variation of high-frequency voltage received by first receiver (c), time variation of induced voltage of secondary coil ( d), time change of the high frequency voltage transmitted by the second transmitter (e), time change of the high frequency voltage received by the second receiver (f), and time of excitation on / off voltage input to the permanent magnet magnetic flux weakening coil excitation controller Change (g) of the present invention, the second And write magnet synchronous motor driving timing chart shown in FIG. 5 will be described with reference to drive flow of the embedded magnet synchronous motor of the present invention.
前記１次電源端子３４ａ（２４ａ），３４ｂ（２４ｂ）に外部電源電圧１０１が印加され、時間が経過して、前記第２送受信スイッチ３２ｆがモニターする、前記リチウムイオン２次電池３７ｂの出力電圧が第１電圧レベルを切るまでは、前記第１送信器３１ｂが電力用高周波電圧の送信状態にある時に、外部電源が遮断された場合の図４に示す本発明の、第１の埋込永久磁石同期のモータ駆動タイムチャートと同様であり、説明を省略する。 The external power supply voltage 101 is applied to the primary power supply terminals 34a (24a) and 34b (24b), and the output voltage of the lithium ion secondary battery 37b monitored by the second transmission / reception switch 32f after time has passed. Until the first voltage level is cut off, the first embedded permanent magnet of the present invention shown in FIG. 4 when the external power supply is cut off when the first transmitter 31b is in the transmission state of the high frequency voltage for power. This is the same as the synchronous motor drive time chart, and the description is omitted.
時間が経過して、前記第２送受信スイッチ３２ｆが前記リチウムイオン２次電池３７ｂの出力電圧が第１電圧レベルを切ったことを検知する（Ｓ１４，Ｙｅｓ）前に、外部電源が遮断されたので、前記第１パワーオンリセット回路３１ａは第１パワーオフ（Ｓ１３，Ｙｅｓ）信号を前記第１送信器３１ｂと前記第１受信器３１ｃと第１送受信スイッチ３１ｄへ出力し、前記第１送受信スイッチ３１ｄは１次コイル３５ａとの接続を該第１受信器３１ｃから該第１送信器３１ｂに切り換え、該第１送信器３１ｂは、電力用高周波電圧送信の停止状態にもかかわらず、前記第１パワーオフ（Ｓ１３，Ｙｅｓ）信号に対応する第１パワーオフの情報用高周波電圧１０２を送信し、前記第２受信器３２ｃは、第１パワーオフの情報用高周波電圧１０２に対応する情報用高周波電圧１０３を受信し、外部電源が遮断されたと判断し、外部電源が遮断されたとの情報をもつ信号を前記第２パワーオンリセット回路３２ａへ出力し、前記第２送受信スイッチ３２ｆ、第２送信器３２ｂ、第２受信器３２ｃと、前記レギュレータ３７ｃと、永久磁石磁束弱めコイル励磁コントローラ３８ａへ第２パワーオフ信号を出力し、前記永久磁石磁束弱めコイルドライバ３８ｂは永久磁石磁束弱めコイル３３ａ，３３ｂ，３３ｃ，３３ｄへの励磁電流の供給を停止する。 Since the external power supply is shut off before the second transmission / reception switch 32f detects that the output voltage of the lithium ion secondary battery 37b has cut off the first voltage level after a lapse of time (Yes in S14). The first power-on reset circuit 31a outputs a first power-off (S13, Yes) signal to the first transmitter 31b, the first receiver 31c, and the first transmission / reception switch 31d, and the first transmission / reception switch 31d. Switches the connection with the primary coil 35a from the first receiver 31c to the first transmitter 31b, and the first transmitter 31b is connected to the first power, regardless of the power high-frequency voltage transmission stopped state. The first power-off information high-frequency voltage 102 corresponding to the off (S13, Yes) signal is transmitted, and the second receiver 32c transmits the first power-off information high-frequency voltage 102. The corresponding information high-frequency voltage 103 is received, it is determined that the external power supply is cut off, a signal having information that the external power supply is cut off is output to the second power-on reset circuit 32a, and the second transmission / reception switch 32f The second transmitter 32b, the second receiver 32c, the regulator 37c, and the permanent magnet flux weakening coil excitation controller 38a output a second power-off signal, and the permanent magnet flux weakening coil driver 38b weakens the permanent magnet flux. The supply of excitation current to the coils 33a, 33b, 33c, and 33d is stopped.
図１に示す、本発明の埋込磁石同期モータ１の永久磁石の極対数は２であったが、本発明は、３以上の場合にも適用でき、また、各極の永久磁石は半径方向に１個であったが、２個以上でも、それぞれの永久磁石に永久磁石磁束弱めコイルを設けることが可能である。 Although the number of pole pairs of the permanent magnet of the embedded magnet synchronous motor 1 of the present invention shown in FIG. 1 is 2, the present invention can be applied to the case of 3 or more, and the permanent magnet of each pole is in the radial direction. However, it is possible to provide a permanent magnet flux weakening coil for each permanent magnet even if there are two or more.
本発明の実施の形態の説明において、所定のモータ回転数以上で、永久磁石磁束弱めコイル励磁コントローラをオンし、永久磁石磁束弱めコイルドライバは永久磁石磁束弱めコイルに励磁電流を供給したが、所定のモータ回転数以上で、モータ回転数を何段階に分け、それぞれのモータ回転数に応じて、励磁電流を切り換えることも可能である。 In the description of the embodiment of the present invention, the permanent magnet magnetic flux weakening coil excitation controller is turned on at a predetermined motor rotational speed or more, and the permanent magnet magnetic flux weakening coil driver supplies the exciting current to the permanent magnet magnetic flux weakening coil. It is also possible to divide the motor rotation speed into any number of stages and to switch the excitation current according to each motor rotation speed.
本発明は、前記永久磁石磁束弱めコイルに励磁電流を供給し、負の小さなｉｄ電流を流す弱め磁束制御を併用することによって、埋込磁石同期モータの高速回転領域を広げられる効果がある。 The present invention, the supplies an exciting current to the permanent magnet flux weakening coils, by combining a magnetic flux weakening control flow negative small i d current, the effect of spread fast rotation region of the interior permanent magnet synchronous motor.
１，２
本発明の埋込磁石同期モータ
１１，８１ ロータ
１２，８２ ステータ
１９，８８ ロータとステータ間のギャップ
１３ａ，１３ｂ，１３ｃ，１３ｄ 永久磁石
１４ａ，１４ｂ，１４ｃ，１４ｄ，３３ａ，３３ｂ，３３ｃ，３３ｄ
永久磁石磁束弱めコイル
１５ａ，１５ｂ，１６ａ，１６ｂ，１７ａ，１７ｂ，１８ａ，１８ｂ
８４ａ，８４ｂ，８５ａ，８５ｂ，８６ａ，８６ｂ，８７ａ，８７ｂ
磁束短絡防止用穴
２５ｂ，３５ａ １次コイル
２６ｃ，３６ａ ２次コイル
３５ｂ １次コンデンサ
３６ｂ ２次コンデンサ
３１ａ 第１パワーオンリセット回路
３２ａ 第２パワーオンリセット回路
３１ｂ 第１送信器
３２ｂ 第２送信器
３１ｃ 第１受信器
３２ｃ 第２受信器
３１ｄ 第１送受信スイッチ
３２ｆ 第２送受信スイッチ
３８ａ 永久磁石磁束弱めコイル励磁コントローラ
３８ｂ 永久磁石磁束弱めコイルドライバ
３２ｄ ダイオード全波整流器
３２ｅ 平滑コンデンサ
３７ｂ，２７ リチウムイオン２次電池
３７ｃ レギュレータ
1, 2
Embedded magnet synchronous motor 11, 81 Rotor 12, 82 Stator 19, 88 Gap between rotor and stator 13a, 13b, 13c, 13d Permanent magnets 14a, 14b, 14c, 14d, 33a, 33b, 33c, 33d
Permanent magnet flux weakening coils 15a, 15b, 16a, 16b, 17 a, 17 b, 18a, 18b
84a, 84b, 85a, 85b, 86a, 86b, 87a, 87b
Magnetic flux short-circuit prevention holes 25b, 35a Primary coil 26c, 36a Secondary coil 35b Primary capacitor 36b Secondary capacitor 31a First power-on reset circuit 32a Second power-on reset circuit 31b First transmitter 32b Second transmitter 31c First receiver 32c Second receiver 31d First transmission / reception switch 32f Second transmission / reception switch 38a Permanent magnet flux weakening coil excitation controller 38b Permanent magnet flux weakening coil driver 32d Diode full-wave rectifier 32e Smoothing capacitors 37b, 27 Lithium ion secondary battery 37c regulator
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