JPS6152175A - Operating system of pole change motor - Google Patents
Operating system of pole change motorInfo
- Publication number
- JPS6152175A JPS6152175A JP59174554A JP17455484A JPS6152175A JP S6152175 A JPS6152175 A JP S6152175A JP 59174554 A JP59174554 A JP 59174554A JP 17455484 A JP17455484 A JP 17455484A JP S6152175 A JPS6152175 A JP S6152175A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- motor
- low
- rotation speed
- pole
- 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
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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
- H02P25/20—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays for pole-changing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、極数変換電動機Ｃ以下Ｐ Ａ Ｍと略弥す
る）の高速運転から低速運転へ切替えるときの運転方式
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an operation method for switching from high-speed operation to low-speed operation of a pole-changing electric motor (hereinafter referred to as PAM).
第１図は、極数変換電動機の接続図であり、図において
、（ＶＢ） ＊ （”３ ） ｅ （ＶＴ）は３相交流
電源（ＶＢ）のそれぞれＲ，Ｓ、Ｔ相電圧、（υ＊ （
２）、 （３）は屍閉器、（４）は極数変換電動機、（
４ａ）、 （４ｂ）、 （４ｃ）は極数変換電動機（４
）のコイル、（Ｕ、）、 （Ｖ、 ）ｅ （Ｗ、）はそ
れぞれコイル（４ａ）、 （４ｂ）、 （４ｃ）の端子
、（Ｕ２ ）Ｉ （Ｗ２ ） ＊ （Ｖ２ ）はそれぞ
れコイル（４ａ）、 （４ｂ）、 （４ｃ）の中間端子
、（０）はコイル（４ａ）、 （４ｂ）、 （４ｃ）を
Ｙ接続した中性点を示す。Figure 1 is a connection diagram of a motor with pole number change. * (
2), (3) is a corpse breaker, (4) is a pole change motor, (
4a), (4b), and (4c) are pole change motors (4
), (U, ), (V, )e (W, ) are the terminals of coils (4a), (4b), (4c), respectively, and (U2 )I (W2 ) * (V2 ) are the terminals of coil (4a), (4b), (4c), respectively. The intermediate terminal of 4a), (4b), and (4c), and (0) indicate the neutral point where the coils (4a), (4b), and (4c) are Y-connected.
第２図は第１図を簡略化した従来極数変換電動機の接続
図であり、（ＴＡ）はタイマーである。又第８図は極数
変換電動機の特性説明図であり、図において（ｎ ）、
（ｎ ）はそれぞれＰＡＭの高、低速Ｌ
運転時の回転数、（５） ＊ （６）はＰＡＭで高速運
転中に電源断としたときの回転数下降特性でそれぞれ低
。FIG. 2 is a connection diagram of a conventional pole-change motor, which is a simplified version of FIG. 1, and (TA) is a timer. Also, Fig. 8 is a characteristic diagram of the pole number change motor, and in the figure (n),
(n) is the rotation speed during high and low speed L operation of PAM, respectively, (5) * (6) is the rotation speed drop characteristic when the power is cut off during high speed operation with PAM, respectively low.
高負荷の場合の特性、（ｔＡ）はタイマー（ＴＡ）の作
動時間、（ｎ６Ｌ （ｎ６）はそれぞれタイム（１Ａ）
における特性（５） ＠ （６）上の回転数である。Characteristics under high load, (tA) is the operating time of the timer (TA), (n6L (n6) is the time (1A)
Characteristic (5) @ (6) is the rotation speed.
次に動作について説明する。第１図に於て高／低速時の
Ｄｎ閉器（１） 、 （２） 、 （３）の囲閉状態は
次のようＩζなっているっ
即ち、低速時には極数変換電動機（４）のコイル端子Ｃ
Ｕ、）、 （Ｖ、、 Ｌ （Ｗ、 ） Ｋそれぞれ８相
交５１ｉ、ＪＨｉＥＥ（ＶＲ） ｅ （ＶＳ ）ｔ （
ＶＴ ）が与えられ、中性点（０）でコイル（４ａ）
、（４ｂ） ＋ （４ｃ）が結ばれ、１つのＹ結線とな
っている。Next, the operation will be explained. In Fig. 1, the enclosed state of Dn closures (1), (2), and (3) at high/low speeds is as follows.In other words, at low speeds, the pole change motor (4) Coil terminal C
U, ), (V,, L (W, ) K each 8 phase intersection 51i, JHiEE(VR) e (VS )t (
VT ) is given, the coil (4a) at the neutral point (0)
, (4b) + (4c) are connected to form one Y-connection.
他方、高速時Ｉζは８相交流電尿電圧（ＶＢ ）＊ （
Ｖ Ｂ ）＊（、ＶＴ）がコイルＣ４ａ）、 （４ｃ）
、 （４ｂ）の中間端子（Ｕ２）ｔ（ｖ２）、（Ｗ２）
に与えられ、中性点（０）を中心とする１つのＹ結線と
開閉器（３）の閉で作られる中性点によるＹ結線とを形
成する。On the other hand, Iζ at high speed is 8-phase AC voltage (VB) * (
V B ) * (, VT) is the coil C4a), (4c)
, (4b) intermediate terminal (U2)t(v2), (W2)
is given to form one Y connection centered on the neutral point (0) and a Y connection by the neutral point created by closing the switch (3).
このように電動機の巻線に中間端子をもうけ、コイルに
流れる電流をかえて極数変換電動機を作っている。In this way, an intermediate terminal is provided in the motor windings and the current flowing through the coils is changed to create a pole change motor.
第２図１ζおいてＰＡＮ（４）を高速運転から低速運転
に切替える場合、先ず高速運転時閉の開閉器（２）。When switching the PAN (4) from high-speed operation to low-speed operation in FIG. 2 1ζ, first switch (2) is closed during high-speed operation.
（３）を開とし、タイマー（ＴＡ）を起動して時限（蝋
）後に開閉器（１）を閉として低速１こ移す。このよう
にしてＰＡＭ（４）を高−低速切替を行うと、開閉器（
２）。(3) is opened, the timer (TA) is started, and after the time limit (wax) has elapsed, the switch (1) is closed and the machine is moved at low speed. When PAM (4) is switched between high and low speeds in this way, the switch (
2).
（３）の聞役には第３図のようにＰＡＭ（４）の負荷が
軽い時はゆっくりと特性（５ンにそって、負荷が重い時
は早く特性（６）にそって回転数（ｎ）は下降する。As shown in Figure 3, when the load on PAM (4) is light, the rotation speed of (3) is slow according to the characteristic (5), and when the load is heavy, it is fast according to the characteristic (6). n) goes down.
一方ＰＡＭの回転数（ｎ）は電源が印加されておれば次
の式（１）により
１２０・ｆ
Ｐ ””“°°゛°°゛°°″゛ 式（１）
規定されるので、低速時の回転数ＣｒＨ，）は固定され
ており、タイマー（ＴＡ）が作動する時点（ｔＡ）での
Ｐ Ａ Ｍ （４）の回転数（ｎ）は、第８図の回転数
（ｎ５）。On the other hand, if the power is applied, the rotation speed (n) of PAM is 120・f P ”””°°゛°°゛°°″゛ Formula (1)
Therefore, the rotational speed CrH, ) at low speed is fixed, and the rotational speed (n) of P A M (4) at the time (tA) when the timer (TA) operates is as shown in Fig. 8. Number of rotations (n5).
（ｎ６）のように、負荷によって変化し、低速回転数（
１１１，）よりずれること〜なる。(n6), it changes depending on the load, and the low speed rotation speed (
111,).
従来のＰＡＭシステムは以上のように構成されているの
で、高−低速切替時に低速側に投入されたとき、ＰＡＭ
の回転数（（ｎ５）、 （ｎ６ ）等）と低速で運転さ
れる時の回転数（ｎＩ、）に差が生じて機械的ショック
を軸系やＰＡＭにつながれたファン等の回転機械に与え
ること＼なり、機械的な破損をまねく恐れがあり、また
これを避けるために機械的に強く製作する必要があるた
めに高価なものになり、既設の設備にＰＡＭを導入する
時には軸系や回転機械を大巾に改造する必要がある等の
欠点があった。Since the conventional PAM system is configured as described above, when the power is input to the low speed side during high-low speed switching, the PAM
There is a difference between the rotation speed ((n5), (n6), etc.) and the rotation speed (nI,) when operating at low speed, which causes a mechanical shock to the shaft system and rotating machinery such as fans connected to the PAM. As a result, there is a risk of mechanical damage, and in order to avoid this, it is necessary to make it mechanically strong, making it expensive, and when introducing PAM into existing equipment, the shaft system and rotation There were drawbacks such as the need to modify the machine to a larger size.
この発明は、上記のような従来のもの＼欠点を除去する
ためになされたもので、ＰＡＭで高→低速切替を行うと
きに、高速運転時の電源開放後、ＰＡＭの回転数が低下
しＰＡＭの低速回転数（ｎＬ）付近になったことを検出
して低速運転へ電源を投入し、Ｐ Ａ Ｍの投入時の回
転数と低速運転時の回転数（ｎｒ、 ）をはゾ同一とす
ることにより、機械的なショックを軽減できるＰＡＭシ
ステムを提供するものである。This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and when switching from high to low speed with PAM, after the power is disconnected during high-speed operation, the rotation speed of PAM decreases and PAM When it detects that the number of revolutions is around the low speed (nL) of This provides a PAM system that can reduce mechanical shock.
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第４図において、（７）は変圧器、（８）はこの変圧器
の出力によりＰＡＮ（４）の回転数を検出する回転数検
出器、（ｉ） 、 （２） 、 （３）は開閉器である
が説明の便宜上、以下の説明では、（２） ｌ （３）
を第１の開閉装置、（１）を第２の開閉装置と呼ぶこと
＼する。In Figure 4, (7) is a transformer, (8) is a rotation speed detector that detects the rotation speed of PAN (4) using the output of this transformer, and (i), (2), and (3) are open/close switches. However, for convenience of explanation, in the following explanation, (2) l (3)
is called the first switchgear, and (1) is called the second switchgear.
第４図において、第１の開閉装置（２）、（３）が開放
されると、ＰＡＭ（４）は無電圧となり自然減速する。In FIG. 4, when the first switching devices (2) and (3) are opened, the PAM (4) becomes non-voltage and naturally decelerates.
１’ＡＭ（４）の残留電圧は変圧器（７）によって適切
な値に変換されて、回転数検出器（８２に与えられる。The residual voltage of 1'AM (4) is converted to an appropriate value by a transformer (7) and provided to a rotation speed detector (82).
ＰＡＭ（４）の残留電圧は、 ＰＡＭ （４）の鉄心
の残留磁束をロータ巻線が切って発生するので、ＰＡＭ
（４）の回転数に比例した周波数の電圧となっている。The residual voltage of PAM (4) is generated when the rotor winding cuts the residual magnetic flux of the iron core of PAM (4).
(4) The voltage has a frequency proportional to the rotation speed.
回転数検出器（８）は残留電圧ゑ周期をディジタルカラ
ラントする等の手段により容易に実現できる。The rotation speed detector (8) can be easily realized by digital coloranting of the residual voltage cycle.
従って、ＰＡＭ（４）の残留電圧を入力として回転数検
出器（８）でＰＡＭ（４）の減速状態の回転数を監視し
、ＰＡＭ（４）の低速運転時の回転数（ｎＬ）近傍に達
したことを検出して第２の開閉装置（１）を投入するの
で、自然減速中のＰＡＭ（４）の回転数とＰＡＭ（４）
の低速運転回転数との差は殆んどＯになっている。Therefore, using the residual voltage of PAM (4) as input, the rotation speed of PAM (4) in the deceleration state is monitored by the rotation speed detector (8), and the rotation speed of PAM (4) in the low-speed operation is near the rotation speed (nL). Since the second switching device (1) is turned on when it detects that the rotation speed of PAM (4) is reached, the rotation speed of PAM (4) during natural deceleration and
The difference between this and the low speed operation speed is almost 0.
なお、上記実施例では回転数検出器（８）として、電＠
桜の残留電圧から回転数を検出する例で説明したが、Ｐ
ＡＭ（４）の回転軸に連結したパイロット発１’？ｒ［
１等の他のどのような原理の回転数検出器でも上記実施
例と同様の効果を奏する。In addition, in the above embodiment, the rotation speed detector (8) is an electric @
Although we explained the example of detecting the rotation speed from the residual voltage of cherry blossoms, P
Pilot output 1'? connected to the rotating shaft of AM (4)? r [
A rotation speed detector based on any other principle, such as No. 1, can produce the same effects as in the above embodiment.
以上のように、この発明によれば、極数変換電動機の高
速→低速切替を行なう時、極数変換電動機の回転数を検
出し、該回転数が低速運転時の回転数近傍に低下した時
点で低速運転の電源を投入するように構成したので、切
替時の機械的ショックを軽減でき、ＰＡΔ（システムを
安価に構成することができる効果がある。As described above, according to the present invention, when switching the pole number changing motor from high speed to low speed, the number of revolutions of the pole number changing motor is detected, and the point in time when the number of revolutions has decreased to near the number of revolutions during low speed operation. Since the configuration is configured such that the power is turned on for low-speed operation at the time of switching, the mechanical shock at the time of switching can be reduced, and the PAΔ(system) can be configured at low cost.
Ｎ１図は極数変換電動機（ＰＡＭ）の接続図、第２図は
従来のＰ Ａ Ｍシステム図、第８図は第２図の特性図
、Ｎ４図はこの発明の一実施例によるＰＡＭシステムを
示す図である。
図において、（ＶＢ）は電源電圧、（２） 、 （３１
は第１の開閉装置、（１）は第２の開閉装置、（４）は
極数変換電動機（ＰＡＭ ） 、 （７）は変圧器、（
８）は回転数検出器である。
なお、図中の同一符号は同−又は相当部分を示す。Figure N1 is a connection diagram of a pole change motor (PAM), Figure 2 is a conventional PAM system diagram, Figure 8 is a characteristic diagram of Figure 2, and Figure N4 is a PAM system according to an embodiment of the present invention. FIG. In the figure, (VB) is the power supply voltage, (2), (31
is the first switchgear, (1) is the second switchgear, (4) is the pole change motor (PAM), (7) is the transformer, (
8) is a rotation speed detector. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (2)
の高速運転中に電源を開放する第１の開閉装置と、電源
開放後に上記極数変換電動機の回転数が低速運転時の回
転数近くまで低下したことを検出する回転数検出器と、
この回転数検出器の作動により低速運転状態に電源を投
入する第２の開閉装置とを備えたことを特徴とする極数
変換電動機の運転方式。(1) A first switchgear that opens the power supply during high-speed operation of a pole-number converting motor that has low-speed and high-speed operating states, and a rotation speed of the pole-number converting motor that is close to the rotation speed during low-speed operation after the power is disconnected. a rotation speed detector that detects that the rotation speed has decreased to
An operating system for a pole-number converting motor, characterized by comprising a second switching device that turns on the power to a low-speed operating state by the operation of the rotation speed detector.
づいて回転数を検出することを特徴とする特許請求の範
囲第１項記載の極数変換電動機の運転方式。(2) The operating system for a pole-changing motor according to claim 1, wherein the rotational speed detector detects the rotational speed based on a residual voltage of the pole-changing motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59174554A JPS6152175A (en) | 1984-08-20 | 1984-08-20 | Operating system of pole change motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59174554A JPS6152175A (en) | 1984-08-20 | 1984-08-20 | Operating system of pole change motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6152175A true JPS6152175A (en) | 1986-03-14 |
Family
ID=15980584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59174554A Pending JPS6152175A (en) | 1984-08-20 | 1984-08-20 | Operating system of pole change motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6152175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61149998U (en) * | 1985-03-07 | 1986-09-16 |
-
1984
- 1984-08-20 JP JP59174554A patent/JPS6152175A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61149998U (en) * | 1985-03-07 | 1986-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU643637B2 (en) | Induction motor switchable between series delta and parallel wye | |
| AU643525B2 (en) | Dual-stator induction synchronous motor | |
| Muljadi et al. | Adjustable ac capacitor for a single-phase induction motor | |
| AU626774B2 (en) | Induction motor | |
| CA2793081C (en) | Electrical machines | |
| JP2788038B2 (en) | Low / high-speed output switching type AC spindle motor and its low / high-speed output switching method | |
| JPS6032596A (en) | Control system of pole change motor | |
| JP3596711B2 (en) | Machine tool motor winding switching device | |
| US2813239A (en) | Two-speed single-phase motors | |
| US2299911A (en) | Motor starting apparatus | |
| US4954740A (en) | Stator winding for two-speed electrodynamic machines having fractional speed ratios | |
| JPS6152175A (en) | Operating system of pole change motor | |
| US4745348A (en) | Apparatus for starting and running a plurality of three-phase motors from a single-phase power source | |
| CN108306553A (en) | Threephase asynchronous machine starting device and its starting method | |
| Diana et al. | Transient behavior of induction motor flux and torque during run-up | |
| JP2720540B2 (en) | Voltage regulator for permanent magnet synchronous generator | |
| US20230253901A1 (en) | Systems and Methods for Controlling a Switching Device for an Electric Motor with Selective Flux Stator | |
| JP2919492B2 (en) | Multiple stator induction motor | |
| US1601410A (en) | Phase and frequency converter | |
| JP3105231B2 (en) | 2 stator induction motor | |
| JP2919498B2 (en) | Variable speed induction motor | |
| US621924A (en) | X m means for speed reduction of asynchronous alternating motors | |
| JPS6141440Y2 (en) | ||
| SU1624654A2 (en) | Multimotor electric drive | |
| JPH0322887A (en) | Operation of ac motor |