JPS63194587A - Commutatorless motor - Google Patents
Commutatorless motorInfo
- Publication number
- JPS63194587A JPS63194587A JP62025148A JP2514887A JPS63194587A JP S63194587 A JPS63194587 A JP S63194587A JP 62025148 A JP62025148 A JP 62025148A JP 2514887 A JP2514887 A JP 2514887A JP S63194587 A JPS63194587 A JP S63194587A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- starting
- signal
- motor
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims description 22
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 18
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、巻線に誘起される逆起電圧を利用して回転子
位置を検出する、ファン等の駆動用に使用される無整流
子電動機に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a commutatorless motor used to drive a fan, etc., which detects the rotor position using a back electromotive force induced in a winding. It is something.
従来の技術
従来この種の無整流子電動機は第５図に示すような構成
であった。図において、１は枢動手段であり、出力端が
３相ブリツジ接続されたスイッチング素子２〜７のスイ
ッチングにより、中性点非接地スター結線された３相の
固定子巻線８〜１゜に対する通電を行なっている。１１
は４極に着磁された磁極をもつ回転子である。回転子１
１の固定子巻線８〜１０に対する相対的な位置を、固定
子巻線８〜１０の端子屈出を入力とする位置検出手段１
２によって検出し、この検出された回転子１１の位置に
より、通電制御手段１３が回転子１１を回転させる枢動
手段１のスイッチング素子２〜７に対するゲート信号を
出力する。２７は起動時に通電制御手段１３の信号によ
らず回転子１１を回転させる起動手段で、この起動手段
２７にて起動後切換え手段２８にて通電制（財）手段１
３による運転に切り換える。2. Description of the Related Art Conventionally, this type of commutatorless motor has a structure as shown in FIG. In the figure, reference numeral 1 denotes a pivoting means which, by switching switching elements 2 to 7 whose output ends are connected in a three-phase bridge, rotates the three-phase stator windings 8 to 1 degrees whose neutral point is non-grounded star connected. Power is being supplied. 11
is a rotor with four magnetic poles. Rotor 1
position detection means 1 which receives terminal bending of stator windings 8 to 10 as input relative to the stator windings 8 to 10;
2, and based on the detected position of the rotor 11, the energization control means 13 outputs a gate signal to the switching elements 2 to 7 of the pivot means 1 for rotating the rotor 11. Reference numeral 27 denotes a starting means for rotating the rotor 11 without depending on the signal from the energization control means 13 at the time of start-up.
Switch to operation 3.
このような構成において、電動機停止時には固定子巻線
８〜１０に逆起電圧が発生せず、位置検出手段１２では
回転子１１の位置検出ができないため、起動手段２７で
３相の固定子巻線８〜１０の特定の相に通電するゲート
信号を枢動手段１に出力し、あらかじめ回転子１１の位
置決めを行なってから、順次通電相を切換える信号を出
力し回転子１１を回転させ、固定子巻線８〜１ｏに逆起
電圧が誘起され位置検出手段１２による位置検出が可能
となると、切換え手段２８にて通電制御手段１３による
運転に切り換えていた。あるいは起動待回転子１１の位
置決めをしない場合でも、あらかじめ回転子１１が停止
していることを確認してから、順次通電相を切り換える
信号を出力して回転子１１を回転させた後、同様に逆起
電圧による位置検出が可能となると、制御手段１３によ
る運転に切り換えていた（たとえば特開昭６７−１７３
３８５号公報および、特開昭５８−２９３８０号公報）
。In such a configuration, when the motor is stopped, no back electromotive force is generated in the stator windings 8 to 10, and the position detection means 12 cannot detect the position of the rotor 11. Therefore, the starting means 27 detects the three-phase stator windings. A gate signal for energizing a specific phase of wires 8 to 10 is output to the pivoting means 1 to position the rotor 11 in advance, and then a signal for sequentially switching the energized phases is output to rotate the rotor 11 and fix it. When a back electromotive voltage is induced in the child windings 8 to 1o and the position detecting means 12 can detect the position, the switching means 28 switches to the operation using the energization control means 13. Alternatively, even if the standby rotor 11 is not positioned, first confirm that the rotor 11 is stopped, output signals to sequentially switch the energized phases to rotate the rotor 11, and then do the same in the same way. When position detection using back electromotive force became possible, operation was switched to control means 13 (for example, in Japanese Patent Laid-Open No. 67-173).
No. 385 and JP-A-58-29380)
.
発明が解決しようとする問題点
このような従来の構成では、起動時に電動機に取付けら
れたファン等の負荷装置が風などの外乱によって回転し
、あらかじめ回転子１１が回転していた場合、回転子の
位置決めに失敗したり、一定の時間内に回転子位置検出
ができず、制御手段１３による運転切換えまでの時間が
長くなり起動時間が長くなったり、あるいは運転切換え
そのものに失敗し、電動機の起動ができなくなるという
問題もあった。Problems to be Solved by the Invention In such a conventional configuration, when a load device such as a fan attached to the electric motor rotates due to a disturbance such as wind during startup, and the rotor 11 is already rotating, the rotor 11 rotates. The positioning of the rotor may fail, the rotor position cannot be detected within a certain period of time, and it takes a long time for the control means 13 to switch the operation, resulting in a longer start-up time, or the operation change itself may fail, causing the motor to start. There was also the problem of not being able to.
本発明はこのような問題点を解決するもので、あらかじ
め回転子が回転していた場合でも起動失敗せず、短い時
間で超勤可能な無整流子電動機を提供することを目的と
するものである。The present invention solves these problems, and aims to provide a commutatorless motor that does not fail to start even if the rotor is already rotating and can be operated overtime in a short period of time. .
問題点を解決するための手段
この問題点を解決するために本発明は、中性点非接地結
腺された３相の固定子巻線と、磁極を有する回転子と、
スイッチング素子によって構成され、前記固定子巻線に
対する通電をする枢動手段と、前記固定子巻線に誘起さ
れる逆起電圧によって前記回転子の前記固定子巻線に対
する相対的な位置を検出する位置検出手段と、この位置
検出手段の出力により前記枢動手段の通電を制御する通
電制御手段と、前記回転子の位置にかかわりなく前記回
転子を回転させるだめの低周波の信号を発生させこの信
号により前記枢動手段の通電を制御する信号発生手段と
、起動時に前記通電制御手段による起動とするか、前記
信号発生手段による起動とするかを決定する起動方法決
定手段と、前記枢動手段の制御を、前記通電制御手段あ
るいは信号発生手段どちらかによる制御に切り換える運
転切換え手段とを設けたものである。Means for Solving the Problem In order to solve this problem, the present invention provides a three-phase stator winding with a neutral point ungrounded, a rotor having magnetic poles,
A pivoting means constituted by a switching element and energizing the stator winding, and detecting the relative position of the rotor with respect to the stator winding by a back electromotive voltage induced in the stator winding. a position detecting means; an energization control means for controlling energization of the pivoting means based on the output of the position detecting means; and a energization control means for generating a low frequency signal for rotating the rotor regardless of the position of the rotor. a signal generating means for controlling energization of the pivoting means by a signal; a starting method determining means for determining whether to start by the energization control means or by the signal generating means at the time of startup; and the pivoting means. and an operation switching means for switching the control to control by either the energization control means or the signal generation means.
作 用
この構成により、起動時に起動方法決定手段があらかじ
め回転子が外乱などによって回転し、回・転子位置検出
が可能な状態の場合は信号発生手段による起動とせず、
直接通電制御手段により起動するよう運転切換え手段に
指示するため、起動時から回転子位置検出をしながらの
運転が可能となり、起動を失敗せずに瞬時に電動機の運
転が可能となる。Effect With this configuration, when starting, the starting method determining means does not start by the signal generating means if the rotor has rotated due to disturbance etc. and the rotation/rotor position can be detected.
Since the operation switching means is directly instructed to start by the energization control means, it is possible to operate while detecting the rotor position from the time of starting, and the motor can be operated instantly without failing to start.
実施例
以下本発明の一実施例について第１図〜第４図にもとづ
き説明する。図において、１５は起動方法決定手段で、
電動機を起動させるときにあらかじめ位置検出手段１２
の出力状態を調査し、運転切換え手段１ｅに信号発生手
段１４による起動とするか通１π制御手段１３による起
動とするかを指示する信号を出力している。運転切換え
手段１６は起動方法決定手段１５の指示にもとづいて、
枢動手段１のスイッチング素子２〜７に出力するゲート
制御信号を切り換えている。その他は第６図に示す従来
例と同じである。EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In the figure, 15 is a startup method determining means;
The position detection means 12 is used in advance when starting the electric motor.
A signal is output to the operation switching means 1e instructing whether to start by the signal generating means 14 or the 1π control means 13. The operation switching means 16, based on the instructions from the starting method determining means 15,
The gate control signals output to the switching elements 2 to 7 of the pivoting means 1 are switched. The rest is the same as the conventional example shown in FIG.
上記構成において、電動機運転が指示されると第２図に
示す手；順にしたがって電動機が起動される。ステップ
ａで電動機の負荷であるファンが風などの外乱などの影
響を受けることにより回転子１１が回転しているかどう
かおよび回転している場合はこの回転により回転子１１
の位置検出が可能となる逆起電圧が固定子巻線２〜７に
誘起されているかどうかを、起動方法決定手段１５が位
置検出手段１２の出力信号を調査することにより判断す
る。回転子１１が回転しておらず逆起電圧が固定子巻線
８〜１０に誘起されず回転子位置検出ができない場合は
、ステップｂで起動方法決定手段１６が運転切換え手段
１６に信号発生手段１４による運転を指示し、次にステ
ップＣで枢動手段１に信号発生手段１４の信号を出力す
る。つまり回転子位置が検出できないため回転子位置に
かかわらず信号発生手段１４により枢動手段１のスイッ
チング素子２〜７にゲート信号を出力し、低周波で３相
の固定子巻線８〜１ｏの通電相を切り換えていくと固定
子には回転磁界が発生し、この回転磁界に同期して回転
子１１が回転する。回転子１１が回転すると逆起電圧に
よる位置検出が可能となるので、ステップｄで運転切換
え手段１６が信号発生手段１４の信号を１枢動手段１に
出力するのを停止するとともに、ステップ１で通電制御
手段１３の信号を枢動手段１に出力するので、以後は位
置検出を行ないながらの安定した運転が可能となる。In the above configuration, when motor operation is instructed, the motor is started according to the procedure shown in FIG. In step a, it is determined whether or not the rotor 11 is rotating due to the influence of disturbance such as wind on the fan, which is the load of the electric motor, and if it is rotating, the rotor 11 is
The starting method determining means 15 determines whether a back electromotive voltage that enables position detection is induced in the stator windings 2 to 7 by examining the output signal of the position detecting means 12. If the rotor 11 is not rotating and no back electromotive force is induced in the stator windings 8 to 10 and the rotor position cannot be detected, in step b the starting method determining means 16 sends a signal to the operation switching means 16 to generate a signal. 14, and then in step C, the signal from the signal generating means 14 is output to the pivoting means 1. In other words, since the rotor position cannot be detected, the signal generating means 14 outputs a gate signal to the switching elements 2 to 7 of the pivoting means 1 regardless of the rotor position, and the gate signal is output to the switching elements 2 to 7 of the pivoting means 1 at low frequency. As the energized phase is switched, a rotating magnetic field is generated in the stator, and the rotor 11 rotates in synchronization with this rotating magnetic field. When the rotor 11 rotates, it becomes possible to detect the position using the back electromotive force, so in step d the operation switching means 16 stops outputting the signal from the signal generating means 14 to the pivoting means 1, and in step 1 Since the signal from the energization control means 13 is output to the pivoting means 1, stable operation is possible while position detection is being performed thereafter.
次にステップａで外乱によって回転子１１が回転してお
り、回転子位置検出手段１２で位置検出が可能な逆起電
圧が固定子巻線８〜１ｏに誘起されている場合は、ステ
ップｅで起動方法決定手段１６が運転切換え手段１６に
通電制御手段１３による運転を指示しステップｆで枢動
手段１に通電制御手段１３の信号を出力するので、電動
機運転が指示されると同時に、ただちに装置検出を行な
いながらの安定した運転が可能となる。この場合逆起電
圧は回転子１１が回転さえしていれば固定子巻線に誘起
され位置検出が可能となるので、回転子１１の回転方向
はどちらでもよい。Next, in step a, if the rotor 11 is rotating due to a disturbance and a back electromotive force whose position can be detected by the rotor position detection means 12 is induced in the stator windings 8 to 1o, step e is performed. The starting method determining means 16 instructs the operation switching means 16 to operate by the energization control means 13, and in step f outputs a signal from the energization control means 13 to the pivoting means 1, so that the device immediately starts operating as soon as the motor operation is instructed. Stable operation is possible while performing detection. In this case, as long as the rotor 11 is rotating, the back electromotive voltage will be induced in the stator windings and the position can be detected, so the rotation direction of the rotor 11 may be either direction.
第３図は要部の具体的な回路の一例を示す。位置検出手
段１２は固定子巻線８〜１ｏの端子電圧を入力とする、
抵抗とコンデンサーから構成された一次の積分特性をも
つフィルター回路とこのフィルター回路の出力を相互に
比較する比較３小ら構成されている。通電制御手段１３
、信号発生手段１４、起動方法決定手段１６、運転切換
え手段１６はマイクロコンピュータ１７および周辺回路
から構成されている。FIG. 3 shows an example of a specific circuit of the main part. The position detection means 12 receives terminal voltages of the stator windings 8 to 1o as input.
It consists of a filter circuit with a first-order integral characteristic composed of a resistor and a capacitor, and three comparison circuits that mutually compare the outputs of this filter circuit. Energization control means 13
, the signal generating means 14, the starting method determining means 16, and the operation switching means 16 are composed of a microcomputer 17 and peripheral circuits.
次に上記のように構成した無整流子電動機の動作を第４
図のフローチャートを用いて説明する。Next, the operation of the commutatorless motor configured as described above is explained in the fourth section.
This will be explained using the flowchart shown in the figure.
電動機の電源を投入すると同時に、マイクロコンピュー
タ１７はステップ１９で位置検出手段１２の出力信号の
取シ込みを開始し、それと同時に、ＲＯＭに記憶された
第４図のフローチャートに示すプログラムの手順にした
がって電動機の回転が始まる。次にステップ２０で位置
検出手段１２の比較器から、通常回転時の位置検出信号
と同じ信号が出力されているかどうか確認する。外乱に
より回転子１１が回転し信号が出力されていれば位置検
出が可能なので、ステップ２４で回転子１１の位置を判
断してから、ステップ２５で通電すべき固定子巻線相を
決定し、ステップ２６でスイッチング素子に対するゲー
ト信号をマイクロコンピュータ１７が出力し、固定子巻
線に対する通′這が行なわれ、回転子１１が回転する。At the same time as the electric motor is turned on, the microcomputer 17 starts receiving the output signal of the position detecting means 12 in step 19, and at the same time, the microcomputer 17 starts receiving the output signal of the position detecting means 12 in accordance with the program procedure shown in the flowchart of FIG. 4 stored in the ROM. The electric motor starts rotating. Next, in step 20, it is checked whether the comparator of the position detection means 12 outputs the same signal as the position detection signal during normal rotation. If the rotor 11 rotates due to disturbance and a signal is output, position detection is possible, so the position of the rotor 11 is determined in step 24, and the stator winding phase to be energized is determined in step 25. In step 26, the microcomputer 17 outputs a gate signal to the switching element, the stator winding is passed through, and the rotor 11 is rotated.
以後はステップ２３で再び位置検出手段１２の比較器か
ら］信号を取込み回転子位置判断をしながらの運転をス
テップ２３からステップ２６の操り返しで行なう。Thereafter, in step 23, a signal is again received from the comparator of the position detecting means 12, and operation is performed by repeating steps 23 to 26 while determining the rotor position.
次にもしステップ２０で回転子１１が回転しておらず比
較器から信号出力がなければ位置検出ができないので、
ステップ２１で固定子に回転磁界を発生させるための低
周波のゲート信号をマイクロコンピュータ１７がスイッ
チング素子２〜７に出力し、回転子１１を同期回転させ
る。回転すれば位置検出が可能となるのでステップ２２
で低周波の回転磁界による運転から、回転子１１の位置
検出を行ないながらの運転に切換えた後、ステップ２３
で位置検出手段１２の比較器からの信号を取り込む。以
後はステップ２３からステップ２６の繰り返しで回転子
位置検出を行ないながらの運転をする。Next, if the rotor 11 is not rotating in step 20 and there is no signal output from the comparator, the position cannot be detected, so
In step 21, the microcomputer 17 outputs a low frequency gate signal to the switching elements 2 to 7 to generate a rotating magnetic field in the stator, causing the rotor 11 to rotate synchronously. If it rotates, position detection becomes possible, so step 22
After switching from operation using a low-frequency rotating magnetic field to operation while detecting the position of the rotor 11, step 23
The signal from the comparator of the position detection means 12 is taken in at. Thereafter, steps 23 to 26 are repeated to perform operation while detecting the rotor position.
以上のように本実施例によれば、起動時にマイクロコン
ピュータが回転子位置検出が可能がどうか判断し、可能
な場合はただちに位置検出をしながらの運転を行なうの
で、回転子が外乱により回転していても、起動失敗せず
に瞬時に安定した運転が可能となる。As described above, according to this embodiment, the microcomputer determines whether rotor position detection is possible at startup, and if possible, the operation is performed while position detection is performed immediately, so that the rotor does not rotate due to disturbance. Even when the engine is running, stable operation is possible without startup failure.
発明の効果
以上の実施例の説明より明らかなように本発明によれば
、起動時に起動方法決定手段が回転子が回転しているか
どうか判断し、位置検出をしながらの起動とするか低周
波の回転磁界による同期回転の起動とするかを選択する
ので、電動機に取り付けられたファンが風などの外乱に
よって回転していた場合でも起動失敗せずただちに安定
した運転が可能という効果が得られる。Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, at the time of startup, the startup method determining means determines whether the rotor is rotating, and determines whether the startup is performed while detecting the position or whether the startup method is performed using a low frequency Since it is possible to select whether to start synchronous rotation using a rotating magnetic field, even if the fan attached to the electric motor is rotating due to external disturbances such as wind, there is no startup failure and stable operation is immediately possible.
第１図は本発明の一実施例における無整流子電動機の概
略構成図、第２図は同運転の順序を示すフローチャート
、第３図は同要部回路図、第４図は同運転のためのプロ
グラムの一例を示すフローチャート、第６図は従来の無
整流子電動機の概略構成図である。
１・・・・・・生動手段、２，３，４，５，６．了・・
・・・・スイッチング素子、８，９．１０・・・・・・
固定子巻線、１１・・・・・・回転子、１２・・・・・
・位置検出手段、１３・・・・・・通電制御手段、１４
・・・・・・信号発生手段、１６・・・・・・起動方法
決定手段、１６・・・・・・運転切換え手段。Fig. 1 is a schematic configuration diagram of a non-commutator motor according to an embodiment of the present invention, Fig. 2 is a flowchart showing the order of the same operation, Fig. 3 is a circuit diagram of the same main part, and Fig. 4 is a diagram for the same operation. FIG. 6 is a flow chart showing an example of a program, and FIG. 6 is a schematic configuration diagram of a conventional commutatorless motor. 1... Living means, 2, 3, 4, 5, 6. Finished...
...Switching element, 8,9.10...
Stator winding, 11...Rotor, 12...
・Position detection means, 13... Energization control means, 14
. . . Signal generation means, 16 . . . Starting method determining means, 16 . . . Operation switching means.
Claims (1)
する回転子と、スイッチング素子によって構成され前記
固定子巻線に対し通電をする駆動手段と、前記固定子巻
線に誘起される逆起電圧によって前記回転子の前記固定
子巻線に対する相対的な位置を検出する位置検出手段と
、この位置検出手段の出力により前記枢動手段の通電を
制御する通電制御手段と、前記回転子の位置にかかわり
なく前記回転子を回転させるための低周波の信号を発生
させこの信号により前記駆動手段の通電を制御する信号
発生手段と、起動時に前記通電制御手段による起動とす
るか、前記信号発生手段による起動とするかを決定する
起動方法決定手段と、前記駆動手段の制御を、前記通電
制御手段あるいは信号発生手段どちらかによる制御に切
換える運転切換手段とを備えた無整流子電動機。A three-phase stator winding with a neutral point non-grounded, a rotor having magnetic poles, a driving means configured by a switching element and energizing the stator winding; position detecting means for detecting the relative position of the rotor with respect to the stator winding by a back electromotive force generated by the rotor; Signal generation means for generating a low frequency signal for rotating the rotor regardless of the position of the rotor and controlling energization of the drive means using this signal, and activation by the energization control means at the time of startup; A non-commutator motor comprising: a starting method determining means for determining whether to start by the signal generating means; and an operation switching means for switching control of the driving means to control by either the energization control means or the signal generating means. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62025148A JPS63194587A (en) | 1987-02-05 | 1987-02-05 | Commutatorless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62025148A JPS63194587A (en) | 1987-02-05 | 1987-02-05 | Commutatorless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63194587A true JPS63194587A (en) | 1988-08-11 |
Family
ID=12157914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62025148A Pending JPS63194587A (en) | 1987-02-05 | 1987-02-05 | Commutatorless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63194587A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4983894A (en) * | 1989-02-01 | 1991-01-08 | Matsushita Electric Industrial Co., Ltd. | Brushless motor driving system |
| EP0556117A2 (en) * | 1992-02-11 | 1993-08-18 | Lg Electronics Inc. | Start assisting device for high speed reluctance motor |
| WO1996028700A1 (en) * | 1995-03-14 | 1996-09-19 | Matsushita Refrigeration Company | Refrigerating apparatus, and refrigerator control and brushless motor starter used in same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61244291A (en) * | 1985-04-22 | 1986-10-30 | Matsushita Electric Ind Co Ltd | Brushless motor drive device |
-
1987
- 1987-02-05 JP JP62025148A patent/JPS63194587A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61244291A (en) * | 1985-04-22 | 1986-10-30 | Matsushita Electric Ind Co Ltd | Brushless motor drive device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4983894A (en) * | 1989-02-01 | 1991-01-08 | Matsushita Electric Industrial Co., Ltd. | Brushless motor driving system |
| EP0556117A2 (en) * | 1992-02-11 | 1993-08-18 | Lg Electronics Inc. | Start assisting device for high speed reluctance motor |
| EP0556117A3 (en) * | 1992-02-11 | 1993-09-22 | Lg Electronics Inc. | Start assisting device for high speed reluctance motor |
| US5268627A (en) * | 1992-02-11 | 1993-12-07 | Goldstar Co., Ltd. | Start assisting device for high speed reluctance motor |
| WO1996028700A1 (en) * | 1995-03-14 | 1996-09-19 | Matsushita Refrigeration Company | Refrigerating apparatus, and refrigerator control and brushless motor starter used in same |
| US5857349A (en) * | 1995-03-14 | 1999-01-12 | Matsushita Refrigeration Company | Refrigerating apparatus, and refrigerator control and brushless motor starter used in same |
| US5970733A (en) * | 1995-03-14 | 1999-10-26 | Matsushita Refrigeration Company | Refrigerating apparatus and refrigerator control and brushless motor starter used in same |
| US6014004A (en) * | 1995-03-14 | 2000-01-11 | Matsushita Refrigeration Company | Refrigerating apparatus, and refrigerator control and brushless motor starter used in same |
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