JPH09294390A - Step-out detecting device in centerless synchronous motor - Google Patents
Step-out detecting device in centerless synchronous motorInfo
- Publication number
- JPH09294390A JPH09294390A JP8105908A JP10590896A JPH09294390A JP H09294390 A JPH09294390 A JP H09294390A JP 8105908 A JP8105908 A JP 8105908A JP 10590896 A JP10590896 A JP 10590896A JP H09294390 A JPH09294390 A JP H09294390A
- Authority
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- Japan
- Prior art keywords
- current
- stator winding
- value
- synchronous motor
- stator
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、センサレス３相交
流同期モータの駆動装置におけるセンサレス同期モータ
の脱調検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step-out detection device for a sensorless synchronous motor in a drive device for a sensorless three-phase AC synchronous motor.
【０００２】[0002]
【従来の技術】従来、センサレス同期モータにおける脱
調検出方法としては、駆動装置を矩形波駆動方式とし、
無通電相の巻線端子に表れる同期モータの誘起電圧と同
期モータの中性点電圧との比較から生成される通電切替
信号の発生時間間隔において、前もって設定している時
間間隔と実測した時間間隔とを比較し、実測した時間間
隔が短い場合に脱調を検出する、図８に示すような方法
（特開平３−２０７２９０号公報）や直流電圧回路とス
イッチング回路との間に流れる電流が通常と逆方向に流
れた場合に脱調を検出する図１０に示すような方法（特
開平７−８７７８２号公報）が提案されている。図８に
おいて、４１はインバータを構成するスイッチング素子
群、４２はブラシレスモータ、４３は位置検出回路制御
装置、４４は通電切替信号発生時間検出器、４５はマイ
クロコンピュータである。通電切替信号発生時間検出器
４４は、位置検出回路制御装置４３からのスイッチング
素子群４１の回転信号の一部を入力とし、ある回転信号
の出力時からその次の回転信号の出力までの時間を計測
してマイクロコンピュータ４５にそのデータを送る。マ
イクロコンピュータ４５は通電切替信号発生時間検出器
４４よりある回転信号の出力時からその次の回転信号の
出力までの時間を受け取り、内部に記憶している時間設
定データと比較して検出時間が短いと、脱調と判断す
る。その後、脱調の再起動の制御をする。図１０におい
て、５１は直流ブラシレスモータ、５２はインバータ回
路、５３は整流回路、５４は平滑コンデンサ、５５はシ
ャント抵抗である。５６はモータ５１のロータの位置を
検出するための位置検出回路であり、３相の比較器を有
している。比較器の出力が制御部５７に出力され、制御
部５７はモータ５１の相巻線にそれぞれ誘起する電圧を
ロータ位置検出部の比較器を通して監視し、その誘起電
圧の変化を基にロータの位置を検出しながらインバータ
回路５２の各トランジスタに対する駆動信号を作成す
る。インバータ回路５２におけるシャント抵抗５５の両
端に、順方向電流検知回路５９及び逆方向電流検知回路
６０からなる電流検知回路５８が接続される。順方向電
流検知回路５９及び逆方向電流検知回路６０は、それぞ
れ、シャント抵抗５５に流れる順方向及び逆方向の電流
を検知し、それぞれ、設定値を超えているか否かを判定
する。2. Description of the Related Art Conventionally, as a step-out detection method in a sensorless synchronous motor, a drive device is a rectangular wave drive system,
In the time interval of the energization switching signal generated by comparing the induced voltage of the synchronous motor appearing at the winding terminal of the non-energized phase and the neutral point voltage of the synchronous motor, the preset time interval and the measured time interval And a method as shown in FIG. 8 (Japanese Patent Laid-Open No. 3-207290) for detecting out-of-step when the measured time interval is short, or the current flowing between the DC voltage circuit and the switching circuit is usually There is proposed a method (Japanese Patent Laid-Open No. 7-87782) for detecting out-of-step when flowing in the opposite direction. In FIG. 8, 41 is a switching element group forming an inverter, 42 is a brushless motor, 43 is a position detection circuit control device, 44 is an energization switching signal generation time detector, and 45 is a microcomputer. The energization switching signal generation time detector 44 receives a part of the rotation signal of the switching element group 41 from the position detection circuit control device 43 as an input, and determines the time from the output of a certain rotation signal to the output of the next rotation signal. It measures and sends the data to the microcomputer 45. The microcomputer 45 receives the time from the output of one rotation signal to the output of the next rotation signal from the energization switching signal generation time detector 44, and the detection time is shorter than the time setting data stored inside. And judge that it is out of sync. After that, the step-out restart is controlled. In FIG. 10, 51 is a DC brushless motor, 52 is an inverter circuit, 53 is a rectifier circuit, 54 is a smoothing capacitor, and 55 is a shunt resistor. Reference numeral 56 denotes a position detection circuit for detecting the position of the rotor of the motor 51, which has a three-phase comparator. The output of the comparator is output to the control unit 57, and the control unit 57 monitors the voltage induced in each phase winding of the motor 51 through the comparator of the rotor position detection unit, and based on the change in the induced voltage, the rotor position is detected. The drive signal for each transistor of the inverter circuit 52 is created while detecting A current detection circuit 58 including a forward current detection circuit 59 and a reverse current detection circuit 60 is connected to both ends of the shunt resistor 55 in the inverter circuit 52. The forward current detection circuit 59 and the reverse current detection circuit 60 respectively detect the forward and reverse currents flowing through the shunt resistor 55, and determine whether or not they exceed the set values.
【０００３】[0003]
【発明が解決しようとする課題】図８に示す従来の方法
においては、無通電用の端子に表れる誘起電圧から通電
切替信号を得ているが、この誘起電圧はインバータ回路
部５２の上アーム、下アーム両トランジスタＯＦＦ後、
転流ダイオードを流れる転流電流が存在する間は検出で
きず、この転流電流が消滅して初めて検出可能となる。
この動作を図９に示す説明図により説明すると、例えば
ｗ相を流れる通常電流は、図９（ａ）に示すように上ア
ームのトランジスタＰwと下アームのトランジスタＮvが
オンのときに流れ、図９（ｂ）に示すように、ｗ相の上
下両トランジスタオフ後、ｗ相の転流ダイオードを流れ
るｗ相の転流電流が消滅すると、ｗ相端子に誘起電圧が
表れる。ところが、同期モータが高速で回転する場合
や、固定子巻線に流れる電流が大きい場合には、上アー
ム、下アーム両トランジスタＯＦＦの全期間中、転流電
流が存在し、従って誘起電圧を検出できず通電切替信号
も得られず脱調も検出できないという問題があった。ま
た、後者の方法においては、図１０に示す電流の流れる
方向の変化から脱調の検出を行うため、同期モータの回
転方向と逆方向のトルクを発生する回生モードとなる運
転状態がある時、この場合も電流の流れる方向が通常と
逆になるので脱調検出との区別ができず、また脱調停止
状態では検出できないという問題があった。そこで本発
明が解決すべき課題は、高速・大電流・回生モード・停
止状態のいずれの状態においても脱調を検出できる装置
を提供することにある。In the conventional method shown in FIG. 8, the energization switching signal is obtained from the induced voltage appearing at the non-energized terminal. This induced voltage is generated by the upper arm of the inverter circuit section 52. After turning off both transistors in the lower arm,
It cannot be detected while the commutation current flowing through the commutation diode is present, and can be detected only when this commutation current disappears.
This operation will be described with reference to the explanatory diagram shown in FIG. 9. For example, a normal current flowing in the w phase flows when the upper arm transistor P w and the lower arm transistor N v are on, as shown in FIG. 9A. As shown in FIG. 9B, when the w-phase commutation current flowing through the w-phase commutation diode disappears after both the w-phase upper and lower transistors are turned off, an induced voltage appears at the w-phase terminal. However, when the synchronous motor rotates at a high speed or when the current flowing through the stator winding is large, commutation current exists during the entire OFF period of both the upper arm transistor and the lower arm transistor, and therefore the induced voltage is detected. However, there is a problem in that the energization switching signal cannot be obtained and the step-out cannot be detected. Further, in the latter method, step-out is detected from the change in the direction of current flow shown in FIG. 10, so that when there is an operating state in which a regenerative mode that generates torque in a direction opposite to the rotation direction of the synchronous motor is present, Also in this case, there is a problem that the direction of current flow is opposite to the normal direction, so that it cannot be distinguished from out-of-step detection and cannot be detected in the step-out stopped state. Therefore, the problem to be solved by the present invention is to provide a device capable of detecting a step-out in any of the high speed, large current, regenerative mode, and stopped state.
【０００４】[0004]
【課題を解決するための手段】前記課題を解決するた
め、本発明のセンサレス同期モータにおける脱調検出装
置は、３相交流電圧を固定子側巻線に印加し固定子巻線
を流れる電流と回転子側の永久磁石による磁界との相互
作用によりトルクを発生し回転するセンサレス同期モー
タの駆動装置において、 前記固定子巻線の電流実効値について判別レベルを設定
し、前記固定子巻線の電流実効値が前記判別レベルを越
え、かつ前記固定子巻線に印加されている電圧と固定子
巻線電流との間の力率角が９０°に近い値となった場合
に脱調検出をする手段を備えたものである。力率角の検
出においては、各固定子巻線への印加電圧瞬時値として
各端子部から端子電圧検出器により直接検出した値を使
用することができる。力率角φを φ＝ｃｏｓ-1｛ｖPN・ｉdc／（３・Ｅ・ｉ）｝ ここでｖPN：直流電圧検出値、ｉdc：直流分、Ｅ：固定
子巻線に印加している電圧の実効値、ｉ：固定子巻線の
電流実効値から検出することができる。電流実効値を検
出する手段は、センサレス同期モータを駆動するインバ
ータを構成する上下段のトランジスタのうち一方の段の
トランジスタがオンしている瞬間に、そのオンしている
相の固定子巻線を流れる瞬時電流値を検出することがで
きる。In order to solve the above-mentioned problems, a step-out detection device for a sensorless synchronous motor according to the present invention applies a three-phase AC voltage to a stator side winding and a current flowing through the stator winding. In a sensorless synchronous motor drive device that generates torque by interaction with a magnetic field of a permanent magnet on the rotor side and rotates, a discrimination level is set for the effective current value of the stator winding, and the current of the stator winding is set. Step-out detection is performed when the effective value exceeds the discrimination level and the power factor angle between the voltage applied to the stator winding and the stator winding current is close to 90 °. It is equipped with means. In detecting the power factor angle, the value directly detected by the terminal voltage detector from each terminal portion can be used as the instantaneous value of the voltage applied to each stator winding. The power factor angle φ is φ = cos −1 {v PN · i dc / (3 · E · i)} where v PN : DC voltage detection value, i dc : DC component, E: applied to the stator winding The effective value of the applied voltage, i: the effective value of the current in the stator winding can be detected. The means for detecting the effective current value is that at the moment when one of the upper and lower transistors forming the inverter that drives the sensorless synchronous motor is on, the stator winding of the on phase is turned on. The instantaneous current value that flows can be detected.
【０００５】[0005]
【発明の実施の形態】以下、本発明の第１実施例を図１
に基づいて説明する。図１において、１は演算装置、２
はセンサレス同期モータ、３、４、５は第１の検出手段
である電流検出器、６はインバータ部、７はコンバータ
部、８は直流電源の平滑コンデンサ、９は第２の検出手
段である直流電源電圧検出器、１０はインバータ部６に
おける６個のパワートランジスタそれぞれへのオン／オ
フ用ドライブ信号である。次に動作について説明する。
まず電流検出器３、４よりｖ相とｗ相の固定子巻線を流
れる瞬時電流値ｉv，ｉwを検出する。なお、説明のため
ｖ相とｗ相としたが、いずれの２相の組合せでも、ある
いはまた３相全てを使用した場合でも同様である。ここ
で固定子巻線電流実効値ｉは例えば ｉ＝｛（ｉw）2／２＋（ｉw＋２・ｉv）2／６｝1/2 から検出できる。また直流電源電圧検出器より検出した
検出値に基づき、演算装置１が６個のパワートランジス
タへのオン／オフ時間を制御することで、演算装置１
は、固定子巻線に印加している電圧の実効値Ｅを制御・
検出でき、さらに瞬時値ｉv，ｉwを検出した瞬間の各固
定子巻線への印加電圧Ｅu，Ｅv，Ｅwをも制御・検出で
きる。このＥu，Ｅv，Ｅw，ｉv，ｉwから、固定子巻線
に印加している電圧と固定子巻線電流との間の力率角φ
は例えば cosφ＝｛Ev・iv＋Ew・iw＋Eu・(−iv−iw)｝／(３・E
・i） φ＝cos-1［｛Ev・iv＋Ew・iw＋Eu・(−iv−iw)｝／(３
・E・i)］ から検出できる。FIG. 1 shows a first embodiment of the present invention.
It will be described based on. In FIG. 1, 1 is an arithmetic unit, 2
Is a sensorless synchronous motor, 3, 4 and 5 are current detectors which are first detecting means, 6 is an inverter section, 7 is a converter section, 8 is a smoothing capacitor of a DC power supply, and 9 is DC which is a second detecting means. The power supply voltage detector 10 is an on / off drive signal for each of the six power transistors in the inverter unit 6. Next, the operation will be described.
Instantaneous current value i v first through the stator windings of the v-phase and w-phase from the current detector 3, 4, detects the i w. Although the v-phase and the w-phase are used for the sake of explanation, the same applies to any combination of two phases or the use of all three phases. Here the stator winding current effective value i can be detected, for example, from i = {(i w) 2 /2 + (i w +2 · i v) 2/6} 1/2. In addition, the arithmetic unit 1 controls the on / off time to the six power transistors based on the detection value detected by the DC power source voltage detector, and thus the arithmetic unit 1
Controls the effective value E of the voltage applied to the stator winding.
Detection can be further instantaneous value i v, applied voltage E u to each stator winding of the moment of detecting the i w, E v, also controls and detection of E w. From these E u , E v , E w , iv , and i w , the power factor angle φ between the voltage applied to the stator winding and the stator winding current
Is, for example, cosφ = {E v · i v + E w · i w + E u · (−i v −i w )} / (3 · E
・ I) φ = cos -1 [{E v · i v + E w · i w + E u · (−i v −i w )} / (3
・ E ・ i)].
【０００６】センサレス同期モータが図２（ａ）に示す
ようにピークをトルクポイントを越えて脱調状態へと移
行する際、図２（ａ）に示すように、必ず同期モータの
出力トルクがゼロとなるポイントを通過する。この出力
トルクがゼロとなるポイント付近では、図２（ｃ）に示
すように力率角は９０°に近い値となり、かつ固定子巻
線電流の実効値ｉは大きな値となる。一方、同期状態で
出力トルクがゼロに近い場合、図２（ｂ）に示すように
固定子巻線電流実効値ｉは通常小さな値となるが、図２
（ｃ）に示すように力率角は９０°に近い値となるの
で、力率角だけでは脱調検出の判別ができない。そこで
固定子巻線の電流実効値ｉについて判別レベルを設定
し、固定子巻線の電流実効値ｉがこの判別レベルを越え
かつ力率角φが９０°に近い値となった場合に脱調検出
をする。停止状態でも同様に検出できる。When the sensorless synchronous motor shifts from the peak to the out-of-step state by exceeding the torque point as shown in FIG. 2 (a), as shown in FIG. 2 (a), the output torque of the synchronous motor is always zero. To pass the point. In the vicinity of the point where the output torque becomes zero, the power factor angle becomes a value close to 90 °, and the effective value i of the stator winding current becomes a large value, as shown in FIG. 2 (c). On the other hand, when the output torque is close to zero in the synchronized state, the stator winding current effective value i usually becomes a small value as shown in FIG.
As shown in (c), the power factor angle has a value close to 90 °, and therefore it is not possible to determine the out-of-step detection only by the power factor angle. Therefore, a discrimination level is set for the effective current value i of the stator winding, and when the effective current value i of the stator winding exceeds this determination level and the power factor angle φ becomes a value close to 90 °, step out occurs. To detect. The same can be detected in the stopped state.
【０００７】次に本発明の第２の実施例を図３に基づい
て説明する。図３において１〜１０の各部は図１と同様
であり、１１は第２の検出手段である各固定子巻線への
印加電圧を直接検出する電圧検出器である。次に第２の
実施例の動作について説明する。固定子巻線電流の実効
値ｉの検出は第１の実施例と同様であるが、力率角φの
検出において、各固定子巻線への印加電圧瞬時値が各端
子部から端子電圧検出器１１により直接検出した値を使
用するところが第１の実施例と異なる。前記力率角φの
検出手段を除くその他の内容は全て第１の実施例と同様
となる。Next, a second embodiment of the present invention will be described with reference to FIG. In FIG. 3, parts 1 to 10 are the same as those in FIG. 1, and 11 is a voltage detector that directly detects the voltage applied to each stator winding, which is the second detecting means. Next, the operation of the second embodiment will be described. The detection of the effective value i of the stator winding current is the same as that of the first embodiment, but in the detection of the power factor angle φ, the instantaneous value of the voltage applied to each stator winding is detected by the terminal voltage from each terminal. The difference from the first embodiment is that the value directly detected by the instrument 11 is used. The contents other than the means for detecting the power factor angle φ are the same as those in the first embodiment.
【０００８】次に本発明の第３の実施例を図４に基づい
て説明する。図４において、２１は第１の検出手段であ
る電流検出器、２２はローパスフィルタ部、２３はピー
クホールド部である。その他の構成は第１の実施例と同
様である。次に第３の実施例の動作について説明する。
まず電流検出器２１より図５（ａ），（ｂ）に示すよう
な検出電流波形が得られる。この波形からローパスフィ
ルタ部２２により直流分ｉdcを抽出し、一方ピークホー
ルド２３からはピーク電流値ｉpを抽出する。ここでｉp
について、インバータ部６のＰＷＭ出力の１キャリア周
期後とのｉpをつなぎ合わせると図６に示すような電流
波形が得られる。この図６の電流波形のピーク値を抽出
する場合には抽出したピーク電流値ｉp( peak)について
固定子巻線電流実効値ｉとｉp(peak)＝√２・ｉ よっ
てｉ＝ｉp(peak)／√２の関係にある。また例えば図６
の電流波形の平均値を抽出する場合には、抽出した電流
値ｉp( AVG)についてｉp(AVG)＝｛(３√２)／π｝・ｉ
よってｉ＝｛π／(３√２)｝・ｉp(AVG)の関係にある。
従って上記のいずれでｉpを抽出しても固定子巻線電流
実効値ｉを検出できる。また直流電源電圧検出器９より
検出した直流電圧検出値ｖPNと、電流検出器２１からロ
ーパスフィルタ部２２より抽出した直流分ｉdcと、固定
子巻線電流実効値ｉと、固定子巻線への印加電圧実効値
Ｅおよび力率角φについて ｖPN・ｉdc＝３・Ｅ・ｉ・ｃｏｓφ の関係がある。ここで固定子巻線への印加電圧実効値Ｅ
は演算装置１が直流電源電圧検出器９の検出値によりイ
ンバータ部６へのオン／オフドライブ信号１０を直接制
御することで制御できる。従って、演算装置１は、Ｅの
値を検出できる。従って力率角φは ｃｏｓφ＝｛ｖPN・ｉdc／（３・Ｅ・ｉ）｝ よってφ＝ｃｏｓ-1｛ｖPN・ｉdc／（３・Ｅ・ｉ）｝か
ら検出できる。以上検出した固定子巻線電流実効値ｉと
力率角φから脱調検出を行う手段は第１の実施例と同様
である。また電流検出器２１の位置については、例えば
図４において直流電源の平滑コンデンサ８の正側（図４
のＰ点）とインバータ部６との間に挿入しても同様の効
果がある。Next, a third embodiment of the present invention will be described with reference to FIG. In FIG. 4, 21 is a current detector which is a first detecting means, 22 is a low pass filter section, and 23 is a peak hold section. Other configurations are the same as those of the first embodiment. Next, the operation of the third embodiment will be described.
First, the detected current waveform as shown in FIGS. 5A and 5B is obtained from the current detector 21. The low pass filter section 22 from the waveform to extract a DC component i dc, whereas extracts the peak current value i p from the peak hold 23. Where i p
For, the current waveform shown in FIG. 6 is obtained when joining the i p and after 1 carrier period of the PWM output of the inverter unit 6. Peak current value i stator winding current effective value for p (peak) i and i p extracted in the case of extracting the peak value of the current waveform of FIG. 6 (peak) = √2 · i Thus i = i p (peak) / √2. Also, for example, in FIG.
When extracting the average value of the current waveform, the extracted current value i p for (AVG) i p (AVG) = {(3√2) / π} · i
Therefore, there is a relationship of i = {π / (3√2)} · ip (AVG) .
Therefore be extracted i p in any of the above can detect stator winding current effective value i. Further, the DC voltage detection value v PN detected by the DC power supply voltage detector 9, the DC component i dc extracted from the current detector 21 by the low-pass filter unit 22, the stator winding current effective value i, and the stator winding There is a relationship of v PN · i dc = 3 · E · i · cos φ with respect to the effective value E of the applied voltage and the power factor angle φ. Here, the effective voltage E applied to the stator winding is
Can be controlled by the arithmetic unit 1 by directly controlling the on / off drive signal 10 to the inverter unit 6 according to the detection value of the DC power supply voltage detector 9. Therefore, the arithmetic unit 1 can detect the value of E. Therefore, the power factor angle φ can be detected from cos φ = {v PN · i dc / (3 · E · i)} and φ = cos −1 {v PN · i dc / (3 · E · i)}. The means for detecting a step-out from the stator winding current effective value i and the power factor angle φ detected above is the same as in the first embodiment. Regarding the position of the current detector 21, for example, in FIG. 4, the positive side of the smoothing capacitor 8 of the DC power source (see FIG.
The same effect can be obtained by inserting it between the point P) and the inverter unit 6.
【０００９】次に本発明の第４の実施例を図７に基づい
て説明する。図７において、１〜１０の各部は図１と同
様であり３１は電流検出器３２、３３、３４からの検出
値のサンプル・ホールド部である。次に第４の実施例の
動作について説明する。電流検出器３２、３３、３４の
出力はインバータ部６の下段のトランジスタがオンして
いる間のみ検出器３２、３３、３４に電流が流れるた
め、検出可能である。従って下段のトランジスタが２つ
オンしている瞬間、例えばｖ相とｗ相がオンしていると
して、ｖ相とｗ相の固定子巻線を流れる瞬時電流値
ｉv，ｉwを検出する。この検出値に基づいて、固定子巻
線電流実効値ｉ及び力率角φの検出、さらに脱調検出手
段については第１の実施例の場合と同様になる。また第
３の実施例で固定子巻線への印加電圧検出手段のみ第２
の実施例と同様にした装置、第４の実施例で固定子巻線
への印加電圧検出手段のみ第２の実施例と同様にした装
置も考えられる。Next, a fourth embodiment of the present invention will be described with reference to FIG. In FIG. 7, each unit of 1 to 10 is the same as that of FIG. 1, and 31 is a sample and hold unit of the detected values from the current detectors 32, 33 and 34. Next, the operation of the fourth embodiment will be described. The outputs of the current detectors 32, 33, 34 can be detected because the current flows through the detectors 32, 33, 34 only while the lower transistors of the inverter unit 6 are on. Accordingly moment the lower transistor is two-one, for example a v-phase and w-phase are turned on, v-phase and instantaneous current flowing in the stator windings of the w-phase value i v, detecting a i w. Based on this detected value, the detection of the stator winding current effective value i and the power factor angle φ, and the step-out detection means are the same as in the case of the first embodiment. Further, in the third embodiment, only the means for detecting the voltage applied to the stator winding is the second one.
A device similar to that of the second embodiment, or a device similar to that of the second embodiment only in the means for detecting the voltage applied to the stator winding in the fourth embodiment can be considered.
【００１０】[0010]
【発明の効果】以上述べたように、本発明によれば、固
定子巻線電流実効値、及びこれと固定子巻線への印加電
圧との力率角とから脱調検出を行うため、センサレス同
期モータが高速、大電流、回生モード、停止状態のいず
れの状態で脱調しても脱調検出できる。As described above, according to the present invention, step-out detection is performed from the effective value of the stator winding current and the power factor angle between the effective value and the voltage applied to the stator winding. Step-out can be detected even if the sensorless synchronous motor goes out of step at any of high speed, large current, regenerative mode, and stop state.
【図１】 本発明の実施例のセンサレス同期モータ駆動
装置のブロック図である。FIG. 1 is a block diagram of a sensorless synchronous motor drive device according to an embodiment of the present invention.
【図２】 センサレス同期モータの出力トルク、固定子
巻線電流実効値、力率角の関係図である。FIG. 2 is a relationship diagram of an output torque of a sensorless synchronous motor, a stator winding current effective value, and a power factor angle.
【図３】 本発明の第２実施例のセンサレス同期モータ
駆動装置のブロック図である。FIG. 3 is a block diagram of a sensorless synchronous motor drive device according to a second embodiment of the present invention.
【図４】 本発明の第３実施例のセンサレス同期モータ
駆動装置のブロック図である。FIG. 4 is a block diagram of a sensorless synchronous motor drive device according to a third embodiment of the present invention.
【図５】 同実施例における電流検出器の検出波形図で
ある。FIG. 5 is a detection waveform diagram of the current detector in the example.
【図６】 同実施例における電流検出器の検出波形から
ピークホールド部により抽出できる電圧波形図である。FIG. 6 is a voltage waveform diagram that can be extracted by the peak hold unit from the detection waveform of the current detector in the example.
【図７】 本発明の第４の実施例のセンサレス同期モー
タ駆動装置のブロック図である。FIG. 7 is a block diagram of a sensorless synchronous motor drive device according to a fourth embodiment of the present invention.
【図８】 従来のセンサレスブラシレスモータの脱調検
出機能付き駆動装置のブロック図である。FIG. 8 is a block diagram of a conventional drive device with a step-out detection function for a sensorless brushless motor.
【図９】 上下両トランジスタのオン／オフ後の転流ダ
イオードを流れる電流の説明図である。FIG. 9 is an explanatory diagram of a current flowing through a commutation diode after turning on / off both upper and lower transistors.
【図１０】 従来のセンサレス同期モータの脱調検出機
能付駆動装置のブロック図である。FIG. 10 is a block diagram of a conventional drive device with a step-out detection function for a sensorless synchronous motor.
１ 演算装置、２ センサレス同期モータ、３，４，５
電流検出器、６ インバータ部、７ コンバータ部、
８ 直流電源の平滑コンデンサ、９ 直流電源電圧検出
器、１０ オン／オフ用ドライブ信号、１１ 端子電圧
検出器、２１ 電流検出器、２２ ローパスフィルタ
部、２３ ピークホールド部、３１ サンプルホールド
部、３２，３３，３４ 電流検出器1 arithmetic unit, 2 sensorless synchronous motors, 3, 4, 5
Current detector, 6 inverter section, 7 converter section,
8 DC power supply smoothing capacitor, 9 DC power supply voltage detector, 10 ON / OFF drive signal, 11 terminal voltage detector, 21 current detector, 22 low pass filter section, 23 peak hold section, 31 sample hold section, 32, 33,34 Current detector
Claims (4)
定子巻線を流れる電流と回転子側の永久磁石による磁界
との相互作用によりトルクを発生し回転するセンサレス
同期モータの駆動装置において、 前記固定子巻線の電流実効値について判別レベルを設定
し、前記固定子巻線の電流実効値が前記判別レベルを越
え、かつ前記固定子巻線に印加されている電圧と固定子
巻線電流との間の力率角が９０°に近い値となった場合
に脱調検出をする手段を備えたことを特徴とするセンサ
レス同期モータにおける脱調検出装置。1. A drive of a sensorless synchronous motor which applies a three-phase AC voltage to a winding on a stator side and generates torque by interaction between a current flowing through the stator winding and a magnetic field generated by a permanent magnet on the rotor side to rotate. In the device, a determination level is set for the effective current value of the stator winding, the effective current value of the stator winding exceeds the determination level, and the voltage applied to the stator winding and the stator A step-out detection device for a sensorless synchronous motor, which is provided with means for detecting step-out when the power factor angle between the winding current and the winding current is close to 90 °.
の印加電圧瞬時値として各端子部から端子電圧検出器に
より直接検出した値を使用することを特徴とする請求項
１記載のセンサレス同期モータにおける脱調検出装置。2. The power factor angle is detected by using a value directly detected by a terminal voltage detector from each terminal portion as an instantaneous value of a voltage applied to each stator winding. Step-out detection device for sensorless synchronous motor.
子巻線に印加している電圧の実効値、ｉ：固定子巻線の
電流実効値から検出することを特徴とする請求項１また
は２記載のセンサレス同期モータにおける脱調検出装
置。3. The power factor angle φ is φ = cos −1 {v PN · i dc / (3 · E · i)}, where v PN : DC voltage detection value, i dc : DC component, E: stator 3. The step-out detection device for a sensorless synchronous motor according to claim 1, wherein the step-out detection device detects the effective value of the voltage applied to the winding, i: the effective value of the current of the stator winding.
ス同期モータを駆動するインバータを構成する上下段の
トランジスタのうち一方の段のトランジスタがオンして
いる瞬間に、そのオンしている相の固定子巻線を流れる
瞬時電流値を検出することを特徴とする請求項１〜３項
のいずれかの項に記載のセンサレス同期モータにおける
脱調検出装置。4. The means for detecting the effective current value is configured such that at the moment when one of the upper and lower transistors forming the inverter for driving the sensorless synchronous motor is turned on, The step-out detection device for a sensorless synchronous motor according to claim 1, wherein an instantaneous current value flowing through the stator winding is detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10590896A JP3741291B2 (en) | 1996-04-25 | 1996-04-25 | Sensorless synchronous motor drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10590896A JP3741291B2 (en) | 1996-04-25 | 1996-04-25 | Sensorless synchronous motor drive device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005223175A Division JP3807507B2 (en) | 2005-08-01 | 2005-08-01 | Sensorless synchronous motor drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09294390A true JPH09294390A (en) | 1997-11-11 |
| JP3741291B2 JP3741291B2 (en) | 2006-02-01 |
Family
ID=14419975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10590896A Expired - Fee Related JP3741291B2 (en) | 1996-04-25 | 1996-04-25 | Sensorless synchronous motor drive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3741291B2 (en) |
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| US6914408B2 (en) | 2001-02-27 | 2005-07-05 | Hitachi, Ltd. | Motor control apparatus and electric vehicle using same |
| JP2006304412A (en) * | 2005-04-18 | 2006-11-02 | Fuji Electric Fa Components & Systems Co Ltd | Driver for permanent magnet type synchronous motor |
| WO2007013291A1 (en) * | 2005-07-27 | 2007-02-01 | Kabushiki Kaisha Yaskawa Denki | Inverter device |
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|---|---|---|---|---|
| US6914408B2 (en) | 2001-02-27 | 2005-07-05 | Hitachi, Ltd. | Motor control apparatus and electric vehicle using same |
| JP2006304412A (en) * | 2005-04-18 | 2006-11-02 | Fuji Electric Fa Components & Systems Co Ltd | Driver for permanent magnet type synchronous motor |
| WO2007013291A1 (en) * | 2005-07-27 | 2007-02-01 | Kabushiki Kaisha Yaskawa Denki | Inverter device |
| US7843161B2 (en) | 2005-07-27 | 2010-11-30 | Kabushiki Kaisha Yaskawa Denki | Inverter device |
| JP2009124812A (en) * | 2007-11-13 | 2009-06-04 | Panasonic Corp | Motor driving device |
| JP2009232569A (en) * | 2008-03-21 | 2009-10-08 | Nsk Ltd | Motor drive control device and electric power steering arrangement using the same |
| JP2011050202A (en) * | 2009-08-28 | 2011-03-10 | Mitsubishi Electric Corp | Drive device of electric motor and air conditioner |
| JP2011069551A (en) * | 2009-09-25 | 2011-04-07 | Mitsubishi Electric Corp | Air conditioner |
| JP2011147306A (en) * | 2010-01-18 | 2011-07-28 | Mitsubishi Electric Corp | Electric motor control circuit, and air conditioner using the same |
| WO2012010087A1 (en) * | 2010-07-22 | 2012-01-26 | 荣信电力电子股份有限公司 | Current-control method for use in high voltage inverter |
| JP2012107859A (en) * | 2012-02-14 | 2012-06-07 | Mitsubishi Electric Corp | Air conditioner |
| WO2015097734A1 (en) * | 2013-12-24 | 2015-07-02 | 株式会社日立産機システム | Power conversion device |
| JP2015133791A (en) * | 2014-01-10 | 2015-07-23 | ダイキン工業株式会社 | Step-out detector and motor drive system |
| WO2018159274A1 (en) | 2017-02-28 | 2018-09-07 | 株式会社日立産機システム | Ac electric motor control device |
| US11273712B2 (en) | 2017-02-28 | 2022-03-15 | Hitachi Industrial Equipment Systems Co., Ltd. | AC electric motor control device |
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