JP6704372B2 - Compressors and equipment equipped with compressors - Google Patents

Compressors and equipment equipped with compressors Download PDF

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JP6704372B2
JP6704372B2 JP2017069573A JP2017069573A JP6704372B2 JP 6704372 B2 JP6704372 B2 JP 6704372B2 JP 2017069573 A JP2017069573 A JP 2017069573A JP 2017069573 A JP2017069573 A JP 2017069573A JP 6704372 B2 JP6704372 B2 JP 6704372B2
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compressor
rotor
magnetic saturation
electromotive voltage
position information
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智允 加藤
智允 加藤
進太郎 小池
進太郎 小池
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Hitachi Global Life Solutions Inc
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Description

本発明は、圧縮機および圧縮機を搭載した機器に関する。 The present invention relates to a compressor and a device equipped with the compressor.

家庭用エアコンや冷蔵庫に使用されているセンサレス制御方式の圧縮機は、一定値の電流を一定時間強制的に印加してロータ位置を固定する「位置決め運転」をしたうえでロータ位置を定めてから、同期運転・センサレス運転へと遷移していく方法が知られている。この位置決め運転に要するモータ電流は、例えば１８０度通電方式の家庭向け冷蔵庫などに搭載する圧縮機では、３Ａ以上に達する場合があり、製品の消費電力量を増大させる要因となる。 The sensorless control type compressor used in home air conditioners and refrigerators does not perform a "positioning operation" in which a constant current is forcibly applied for a fixed time to fix the rotor position, and then the rotor position is determined. , A method of transitioning to synchronous operation/sensorless operation is known. The motor current required for this positioning operation may reach 3 A or more in a compressor mounted in a 180-degree energization type home-use refrigerator, for example, which causes an increase in power consumption of the product.

特許文献１は、１８０度通電運転において圧縮機１の停止が指示された場合は、モータの回転数を下げて行き、十分回転数が低下したら、回転子２２が所定の位置になったときにインバータ７への転流パルスの供給を停止させてピストン２４を停止させることで、固定子を予め定められた位置に停止させるとしている（００２５，００３１）。また、起動時には低い周波数の回転磁界を発生させて固定子２０と回転子２２の相を一致させる相固定運転を行う（００２６）。 In Patent Document 1, when the stop of the compressor 1 is instructed in the 180-degree energization operation, the rotation speed of the motor is reduced, and when the rotation speed is sufficiently reduced, when the rotor 22 reaches a predetermined position. The stator is stopped at a predetermined position by stopping the supply of the commutation pulse to the inverter 7 and stopping the piston 24 (0025, 0031). In addition, at the time of start-up, a rotating magnetic field having a low frequency is generated to perform a phase fixing operation for matching the phases of the stator 20 and the rotor 22 (0026).

特開２００７−９２６８６号公報JP, 2007-92686, A

しかしながら、特許文献１は、予め定められた位置にピストンや固定子を停止させる方法を具体的に開示していない。また、仮にその具体的手段が当業者に明らかな程度に示唆されているとしても、モータ回転制御およびロータ位置検出のために、三相の電流値および電圧値を検出する電流検出機構および電圧検出機構を有し、両検出値から圧縮機停止直前のピストン位置を検出し、常に一定の位置で停止させるには、ロータ位置推定のための専用制御部や複数のセンサを追加で実装する必要が生じると考えられる。 However, Patent Document 1 does not specifically disclose a method of stopping the piston or the stator at a predetermined position. Further, even if the specific means is suggested to a person skilled in the art to a degree obvious to the person skilled in the art, a current detection mechanism and a voltage detection for detecting a three-phase current value and a voltage value for motor rotation control and rotor position detection. In order to detect the piston position immediately before the compressor stops from both detection values and always stop at a fixed position, it is necessary to additionally install a dedicated control unit and multiple sensors for rotor position estimation. It is thought to occur.

上記事情に鑑みてなされた本発明は、
回転子と、固定子と、を有し、１２０度通電方式による駆動が可能なモータを有する圧縮機であって、
当該圧縮機を起動させる場合、
前記回転子の停止位置情報を利用して運転初期条件を決定し、
当該圧縮機を停止させる場合、
前記回転子の回転数を減少させていき、
前記１２０度通電方式を実行させて開放相に現れる磁気飽和起電圧の測定結果の情報を利用して前記回転子の停止位置情報を保存することを特徴とする。 The present invention made in view of the above circumstances,
A compressor having a rotor and a stator and having a motor capable of being driven by a 120-degree energization method,
When starting the compressor,
Using the stop position information of the rotor to determine the initial operating conditions ,
When stopping the compressor,
Decreasing the number of rotations of the rotor,
The rotor stop position information is stored by using the information of the measurement result of the magnetic saturation electromotive voltage that appears in the open phase after the 120-degree energization method is executed .

実施例１の冷蔵庫の概略図Schematic diagram of the refrigerator of Example 1 実施例１の密閉型圧縮機の縦断面図Vertical cross-sectional view of the hermetic compressor of Example 1. 実施例１の一般的圧縮機起動時の制御フローControl flow at the time of starting the general compressor of the first embodiment 実施例１の圧縮機停止時の圧縮機回転数の変化と磁気飽和起電圧検出範囲をあらわすグラフ3 is a graph showing a change in compressor rotation speed and a magnetic saturation electromotive force detection range when the compressor of Example 1 is stopped.

以下、本発明の実施例について添付の図面を参照しつつ説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１は実施例１の冷蔵庫の概略図である。圧縮機を有する機器の一例としての冷蔵庫は、食品を収納する筐体１と、冷媒を圧縮する圧縮機２と、冷媒を循環させる循環部３と、制御部４と、圧縮機２の運転を制御する圧縮機制御部５と、圧縮機２へ通電するインバータ回路部６と、圧縮機モータ８の３相（Ｕ相、Ｖ相、Ｗ相）の磁気飽和起電圧を検出する磁気飽和起電圧検出部７と、を備え、圧縮機２回転中の開放相に現れる磁気飽和起電圧を検出する機能を有する。 FIG. 1 is a schematic diagram of the refrigerator according to the first embodiment. A refrigerator as an example of a device having a compressor includes a housing 1 for storing food, a compressor 2 for compressing a refrigerant, a circulation unit 3 for circulating a refrigerant, a control unit 4, and an operation of the compressor 2. Compressor control unit 5 for controlling, inverter circuit unit 6 for energizing compressor 2, and magnetic saturation electromotive voltage for detecting magnetic saturation electromotive voltage of three phases (U phase, V phase, W phase) of compressor motor 8 The detector 7 is provided and has a function of detecting a magnetic saturation electromotive voltage that appears in an open phase during two rotations of the compressor.

図２は圧縮機の一例として示す本実施例の密閉型圧縮機１００の縦断面図である。密閉型圧縮機１００は、密閉容器１５内に潤滑油２０を貯留すると共に、主に気相の冷媒が充填されている。密閉型圧縮機１００は、圧縮要素としてシリンダ１６を備えるフレーム１４、シリンダ１６内を往復自在に嵌入されたピストン１３、及びフレーム１４の主軸受に軸支されて回転するクランクシャフト１８を密閉容器１５（上側容器１５ａ、下側容器１５ｂ）内に有している。 FIG. 2 is a vertical cross-sectional view of the hermetic compressor 100 of this embodiment shown as an example of the compressor. The hermetic compressor 100 stores the lubricating oil 20 in the hermetic container 15 and is mainly filled with a vapor phase refrigerant. The hermetic compressor 100 includes a frame 14 having a cylinder 16 as a compression element, a piston 13 reciprocally fitted in the cylinder 16, and a crankshaft 18 which is pivotally supported by a main bearing of the frame 14 and rotates. (Upper container 15a, lower container 15b).

クランクシャフト１８は、主軸受内で回転する主軸部１８ｂと、主軸部１８ｂと一体で、主軸部１８ｂの回転軸周りを公転する偏心部１８ａとを有している。クランクシャフト１８の主軸受はフレーム１４に固設、或いはフレーム１４と一体に形成されている。偏心部１８ａの公転運動は、コネクティングロッド２８を介してピストン１３の往復運動に変換される。コネクティングロッド２８は、一端がピストン１３に連結し、他端が偏心部１８ａに連結している。 The crankshaft 18 has a main shaft portion 18b that rotates in the main bearing, and an eccentric portion 18a that revolves around the rotation axis of the main shaft portion 18b integrally with the main shaft portion 18b. The main bearing of the crankshaft 18 is fixed to the frame 14 or formed integrally with the frame 14. The orbital motion of the eccentric portion 18 a is converted into the reciprocating motion of the piston 13 via the connecting rod 28. The connecting rod 28 has one end connected to the piston 13 and the other end connected to the eccentric portion 18a.

密閉型圧縮機１００はフレーム１４の下方に圧縮機モータ８を有している。圧縮機モータ８はクランクシャフト１８に回転力を付与する機構であり、インバータ回路部６の指令に応じて電流が流れるコイルが設けられた固定子１１と、永久磁石を内蔵し主軸部１８ｂに取付られた回転子２５とから構成される。固定子１１のコイルに電流が流れることで発生する磁束が回転子２５を回転させ、これに伴い主軸部１８ｂが回転する。圧縮機モータ８は、１２０度通電方式及び１８０度通電方式による３相駆動を選択的に切り替えることができる。 The hermetic compressor 100 has a compressor motor 8 below the frame 14. The compressor motor 8 is a mechanism for imparting a rotational force to the crankshaft 18, and has a stator 11 provided with a coil through which a current flows according to a command from the inverter circuit section 6 and a permanent magnet built-in and attached to the main shaft section 18b. And a rotor 25 that is rotated. The magnetic flux generated by the current flowing through the coil of the stator 11 rotates the rotor 25, and the main shaft portion 18b rotates accordingly. The compressor motor 8 can selectively switch between three-phase driving by a 120-degree energization method and a 180-degree energization method.

主軸部１８ｂを起点として、主軸部１８ｂの回転軸に直交する方向（径方向）には、順に、回転子２５、固定子１１、防振バネ３０が設けられている。防振バネ３０の一端は、固定子１１のコイル１１０よりも径方向外側でフレーム１４に接続している。また、防振バネ３０の他端は、潤滑油２０の液面より上方に位置している。 A rotor 25, a stator 11, and a vibration-proof spring 30 are sequentially provided in a direction (radial direction) orthogonal to the rotation axis of the main shaft portion 18b with the main shaft portion 18b as a starting point. One end of the vibration-proof spring 30 is connected to the frame 14 radially outside the coil 110 of the stator 11. The other end of the vibration-proof spring 30 is located above the liquid surface of the lubricating oil 20.

圧縮機２、圧縮機制御部５、インバータ回路部６、及び磁気飽和起電圧検出部７は電気的に接続されている。圧縮機制御部５が圧縮機モータ８の３相９（Ｕ相、Ｖ相、Ｗ相）の各相に印加する電圧出力を制御することで、圧縮機モータ８を駆動させる。 The compressor 2, the compressor control unit 5, the inverter circuit unit 6, and the magnetic saturation electromotive force detection unit 7 are electrically connected. The compressor control unit 5 drives the compressor motor 8 by controlling the voltage output applied to each of the three phases 9 (U phase, V phase, W phase) of the compressor motor 8.

モータ駆動制御として１２０度通電方式においては、通電は（瞬間的には）２相のみになされ、残りの１相（開放相）には通電されない。この開放相に現れる磁気飽和起電圧には、ロータ（回転子）の位置による特性の変化が現れる。１２０度通電方式による圧縮機制御では、この磁気飽和起電圧を検出することができ、モータ８駆動中のロータの位置を推定することができる。 In the 120-degree energization method as the motor drive control, energization is performed (instantaneously) in only two phases, and the remaining one phase (open phase) is not energized. In the magnetic saturation electromotive voltage appearing in this open phase, the characteristic changes depending on the position of the rotor (rotor). In the compressor control by the 120-degree energization method, this magnetic saturation electromotive voltage can be detected, and the position of the rotor during driving the motor 8 can be estimated.

本実施例では、この磁気飽和起電圧の検出を、圧縮機２の定常運転中だけでなく、停止時のロータ位置推定にも用いる。 In this embodiment, the detection of the magnetic saturation electromotive voltage is used not only during the steady operation of the compressor 2 but also for estimating the rotor position when the compressor 2 is stopped.

図３は、圧縮機２の起動制御フローである。制御部４が冷蔵庫筐体内の温度を監視し、冷却運転の必要に応じて圧縮機２を運転させる指令を出力するよう圧縮機制御部５に指示する。圧縮機起動要求を受け取った圧縮機制御部５は（ステップＳ１，Ｙｅｓ）、前回の圧縮機停止制御の過程で保存したロータ位置情報を呼び出させる（ステップＳ１，Ｙｅｓ、ステップＳ２）。ロータ位置情報は、圧縮機の停止制御を未だしたことがない場合、すなわち、圧縮機２の製造後初めての起動をする場合は、呼び出しができないことがある。この場合は、圧縮機２の製造工程においてロータ位置の初期情報を記憶させるようにしておいてもよいし、初めての起動についてはロータ位置情報を呼び出させずに、公知の位置決め運転を実行させるようにしても良い。 FIG. 3 is a startup control flow of the compressor 2. The control unit 4 monitors the temperature inside the refrigerator housing and instructs the compressor control unit 5 to output a command to operate the compressor 2 as needed for the cooling operation. The compressor control unit 5 that has received the compressor start request (step S1, Yes) calls the rotor position information stored in the process of the previous compressor stop control (step S1, Yes, step S2). The rotor position information may not be called when the compressor stop control has not been performed yet, that is, when the compressor 2 is started for the first time after manufacturing. In this case, the initial information of the rotor position may be stored in the manufacturing process of the compressor 2, or the known positioning operation may be performed without calling the rotor position information for the first start. You can

呼び出したロータ位置情報、又は位置決め運転によりロータ位置が既知となるので、これに基づいて圧縮機２は運転初期条件を決定する（ステップＳ３）。具体的には、ロータ位置によって変化する、ロータの回転に必要な電流磁束方向を決める通電パターン（一般的な三相インバータ回路であれば、六つあるスイッチング素子への通電パターン）を、既知のロータ位置に合わせて決定する。このような通電パターンは周知である。 Since the rotor position becomes known by the called rotor position information or the positioning operation, the compressor 2 determines the operation initial condition based on this (step S3). Specifically, an energization pattern (an energization pattern for six switching elements in the case of a general three-phase inverter circuit) that determines the current magnetic flux direction required for rotation of the rotor, which changes depending on the rotor position, is known. Determine according to the rotor position. Such energization patterns are well known.

その後、圧縮機２は同期運転を開始する（ステップＳ４）。同期運転では、センサレス運転に必要な電流値の情報が得られる回転数まで、モータの回転数を加速させる。電流値の検出が可能になった場合（ステップＳ５，Ｙｅｓ）、モータ負荷にあわせた電圧制御を開始し、センサレス運転に移行する（ステップＳ６）。 Then, the compressor 2 starts a synchronous operation (step S4). In the synchronous operation, the rotational speed of the motor is accelerated to the rotational speed at which the information on the current value required for the sensorless operation is obtained. When the current value can be detected (step S5, Yes), the voltage control according to the motor load is started, and the sensorless operation is started (step S6).

センサレス運転中、圧縮機２の停止指令を受取った場合（ステップＳ７，Ｙｅｓ）、圧縮機制御部５はモータ８への電圧出力を停止し、圧縮機２の駆動を停止させる制御を開始する。 When the stop command for the compressor 2 is received during the sensorless operation (step S7, Yes), the compressor control unit 5 stops the voltage output to the motor 8 and starts the control for stopping the driving of the compressor 2.

図４は圧縮機２停止時の圧縮機２回転数の変化と磁気飽和起電圧検出範囲をあらわすグラフである。１８０度通電方式又は１２０度通電方式でモータへの電圧出力を行っている（例えば電圧制御を行っている）状態で、ステップＳ７で制御部４から圧縮機２の停止指令を受取った圧縮機制御部５は、即座にモータへの電圧出力を停止するのではなく、ロータの回転数を徐々に低下させる（ステップＳ８、「減速開始」）。圧縮機２の運転の安定性の観点からは、この間の通電方式は１８０度通電方式が好ましい。 FIG. 4 is a graph showing changes in the number of revolutions of the compressor 2 when the compressor 2 is stopped and a magnetic saturation electromotive voltage detection range. Compressor control that receives a stop command for the compressor 2 from the control unit 4 in step S7 in a state in which voltage is output to the motor by the 180-degree energization method or the 120-degree energization method (for example, voltage control is being performed) The unit 5 does not immediately stop the voltage output to the motor, but gradually reduces the rotation speed of the rotor (step S8, "deceleration start"). From the viewpoint of the stability of the operation of the compressor 2, the energization method during this period is preferably the 180-degree energization method.

回転数を減速させていき、第１の閾値、例えば１５００ｍｉｎ−１に到達したら、制御部４は、駆動方式を１２０度通電方式に切り替えるように指令を出す（ステップＳ９、「１２０度通電方式に切替え」）。元々１２０度通電方式で駆動していた場合は、その通電方式を維持する。これにより、開放相が生じることとなり、磁気飽和起電圧の観測が可能になる。 When the rotation speed is decelerated and the first threshold value, for example, 1500 min −1 is reached, the control unit 4 issues a command to switch the drive method to the 120-degree energization method (step S9, “120-degree energization method”). Switch"). When originally driven by the 120-degree energization method, the energization method is maintained. As a result, an open phase is generated and the magnetic saturation electromotive voltage can be observed.

しかし、１２０度通電方式に切り替える指令を出した直後は、通電方式の切り替えに伴い電圧が乱れているため、直ちには磁気飽和起電圧の観測を開始しない方が好ましい。このため、さらに回転数が低下して、第２の閾値、例えば１０００ｍｉｎ−１を下回ったら、磁気飽和起電圧検出部７は磁気飽和起電圧の検出を開始し（ステップＳ１０、「磁気飽和起電圧測定区間」）、圧縮機２のロータ位置推定を行う。ロータ位置推定の精度を確保するために、或る程度の時間に亘って測定を行うことが好ましい。本実施例では概ね１０秒以上測定を行うようにしている。 However, immediately after the command to switch to the 120-degree energization method is issued, the voltage is disturbed due to the switching of the energization method, so it is preferable not to immediately start the observation of the magnetic saturation electromotive voltage. Therefore, when the rotation speed further decreases and falls below the second threshold value, for example, 1000 min −1 , the magnetic saturation electromotive voltage detection unit 7 starts detection of the magnetic saturation electromotive voltage (step S10, “magnetic saturation electromotive voltage”). Measurement section"), the rotor position of the compressor 2 is estimated. In order to ensure the accuracy of rotor position estimation, it is preferable to perform the measurement for a certain period of time. In this embodiment, the measurement is performed for approximately 10 seconds or longer.

圧縮機２には、駆動を維持可能な最低回転数があり、回転数が低下していきこれに到達すると、急激に回転数が低下して停止する。第２の閾値は、この最低回転数よりも高い回転数であり、制御部４が圧縮機２の回転数を低下させていく際、この最低回転数に至らせる１０秒以上前、好ましくは１５秒以上前から磁気飽和起電圧を観測できるように設定することが好ましい。 The compressor 2 has a minimum rotation speed at which the drive can be maintained, and when the rotation speed decreases and reaches this speed, the rotation speed suddenly decreases and stops. The second threshold value is a rotation speed higher than the minimum rotation speed, and when the control unit 4 decreases the rotation speed of the compressor 2, 10 seconds or more, preferably 15 seconds before reaching the minimum rotation speed. It is preferable to set it so that the magnetic saturation electromotive force can be observed for more than a second.

回転数の減速を開始してから第１の閾値に至るまで（ステップＳ８開始からステップＳ９実行まで）、第１の閾値から第２の閾値に至るまで（ステップＳ９開始からステップＳ１０実行まで）、第２の閾値から後述する電圧印加を停止するまで（ステップＳ１０開始からステップＳ１１実行まで）、のそれぞれの間、回転数の減速速度は略一定にすることが好ましい。本実施例では、これらすべての間を通じて一定の減速速度に設定している。これにより、停止制御を滑らかに行うことができるとともに、磁気飽和起電圧の検出精度を好適にすることができる。 From the start of deceleration of the rotational speed to the first threshold (from the start of step S8 to the execution of step S9), from the first threshold to the second threshold (from the start of step S9 to the execution of step S10), It is preferable that the deceleration speed of the rotational speed be substantially constant during each of the second threshold value and the stop of voltage application described later (from the start of step S10 to the execution of step S11). In this embodiment, a constant deceleration speed is set throughout all of these. As a result, the stop control can be smoothly performed, and the detection accuracy of the magnetic saturation electromotive voltage can be made suitable.

なお、本実施例のように第２の閾値前後で減速速度を略一定にしても良いが、例えば磁気飽和起電圧の検出を開始してからは、圧縮機２の回転数の減速速度を制御して、ロータの停止位置を制御してもよい。これにより、ロータ停止位置を、圧縮機２の下死点を避ける、上死点を避ける又は上死点に設定させるようにすることもできる。下死点を避ける場合、圧縮機２の起動直後、すなわち低速時の運転で流体の圧縮を行う必要が低減できるので、起動を容易に行いやすくなる。 Although the deceleration speed may be made substantially constant around the second threshold value as in the present embodiment, for example, after the detection of the magnetic saturation electromotive voltage is started, the deceleration speed of the rotation speed of the compressor 2 is controlled. Then, the stop position of the rotor may be controlled. As a result, the rotor stop position can be set so as to avoid the bottom dead center of the compressor 2, avoid top dead center, or be set to top dead center. When avoiding the bottom dead center, it is possible to reduce the need to perform the compression of the fluid immediately after the compressor 2 is started, that is, in the operation at a low speed, so that the start can be easily performed.

モータの回転数が十分に低下して、圧縮機２の最低回転数又はこの近傍の回転数である第３の閾値、例えば１００ｍｉｎ−１に到達したら、制御部４はモータへの電圧の印加を停止する（ステップＳ１１）。磁気飽和起電圧検出部７が観測していた磁気飽和起電圧の情報に基づいて、圧縮機制御部５は停止時のロータ位置を推定する。圧縮機２は、この推定した位置情報を保存する（ステップＳ１２）。この情報の保存は、圧縮機２内部または外部の記憶装置に保存させることで実行できる。 When the rotation speed of the motor is sufficiently lowered to reach the third rotation speed of the compressor 2 or a third threshold value which is the rotation speed in the vicinity thereof, for example, 100 min −1 , the control unit 4 applies the voltage to the motor. Stop (step S11). The compressor control unit 5 estimates the rotor position at the time of stop based on the information on the magnetic saturation electromotive voltage observed by the magnetic saturation electromotive voltage detection unit 7. The compressor 2 stores the estimated position information (step S12). This information can be stored by storing it in the storage device inside or outside the compressor 2.

その後、再び圧縮機運転の開始要求があった場合（ステップＳ１，Ｙｅｓ）、保存した位置情報を呼び出す（ステップＳ２）。これにより、効果的な運転初期条件の決定（ステップＳ３）を行うことができる。 After that, when there is a request to start the compressor operation again (step S1, Yes), the stored position information is called (step S2). As a result, it is possible to effectively determine the initial condition of operation (step S3).

なお、１２０度通電方式への切替え回転数（第１の閾値）、および磁気飽和起電圧検出開始の回転数（第２の閾値）、モータへの電圧の印加を停止する時の回転数（第３の閾値）は、前述の数値に限られるものではない。 The number of rotations for switching to the 120-degree energization method (first threshold), the number of rotations for starting magnetic saturation electromotive voltage detection (second threshold), and the number of rotations when the voltage application to the motor is stopped (second). The threshold value of 3) is not limited to the above-mentioned numerical value.

以上の動作により、圧縮機制御部５は停止中の圧縮機のロータ位置を把握することができるから、起動時に改めてロータを所定の位置に合せる必要性が低減又はなくなるため、消費電力量を低減した圧縮機、および圧縮機を搭載した機器を提供することができる。 With the above operation, the compressor control unit 5 can grasp the rotor position of the compressor that is stopped. Therefore, it is not necessary or necessary to adjust the rotor to a predetermined position again at the time of startup, so that the power consumption is reduced. It is possible to provide the compressor and the device equipped with the compressor.

１ 筐体
２ 圧縮機
３ 冷媒循環部
４ 制御部
５ 圧縮機制御部
６ インバータ回路部
７ 磁気飽和起電圧検出部
８ モータ
９ 三相（Ｕ相、Ｖ相、Ｗ相） 1 Case 2 Compressor 3 Refrigerant circulation part 4 Control part 5 Compressor control part 6 Inverter circuit part 7 Magnetic saturation electromotive force detection part 8 Motor 9 Three phase (U phase, V phase, W phase)

Claims (3)

回転子と、固定子と、を有し、１２０度通電方式による駆動が可能なモータを有する圧縮機であって、
当該圧縮機を起動させる場合、
前記回転子の停止位置情報を利用して運転初期条件を決定し、
当該圧縮機を停止させる前に１８０度通電方式で駆動し、
当該圧縮機を停止させる場合、
前記回転子の回転数を減少させていき、
前記１８０度通電方式から前記１２０度通電方式に通電方式を切替えて開放相に現れる磁気飽和起電圧の測定結果の情報を利用して前記回転子の停止位置情報を保存することを特徴とする圧縮機。 A compressor having a rotor and a stator and having a motor capable of being driven by a 120-degree energization method,
When starting the compressor,
Using the stop position information of the rotor to determine the initial operating conditions,
Drive the 180-degree energizing method before stopping the compressor,
When stopping the compressor,
Decreasing the number of rotations of the rotor,
The compression is characterized in that the stop position information of the rotor is stored by using the information of the measurement result of the magnetic saturation electromotive voltage appearing in the open phase by switching the conduction method from the 180-degree conduction method to the 120-degree conduction method. Machine. 当該圧縮機を停止させる場合、
前記回転子の回転数を減少させていき、
前記１２０度通電方式を実行させて磁気飽和起電圧をを或る程度の時間に亘って測定し続け、
前記回転子を停止させる指令を出力し、
該測定した磁気飽和起電圧の情報を利用して前記回転子の停止位置情報を保存し、
当該圧縮機を次回起動させる場合、前記停止位置情報を利用して運転初期条件を決定することを特徴とする請求項１に記載の圧縮機。 When stopping the compressor,
Decreasing the number of rotations of the rotor,
The 120 degree energization method is executed to continuously measure the magnetic saturation electromotive voltage for a certain period of time ,
Outputs a command to stop the rotor,
The information of the measured magnetic saturation electromotive voltage is used to store the stop position information of the rotor,
The compressor according to claim 1, wherein when the compressor is started next time, the operation initial condition is determined by using the stop position information. 請求項１又は２に記載の圧縮機を有することを特徴とする機器。 Equipment characterized in that it comprises a compressor according to claim 1 or 2.
JP2017069573A 2017-03-31 2017-03-31 Compressors and equipment equipped with compressors Expired - Fee Related JP6704372B2 (en)

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