JP4316948B2 - Low pressure motor - Google Patents
Low pressure motor Download PDFInfo
- Publication number
- JP4316948B2 JP4316948B2 JP2003207557A JP2003207557A JP4316948B2 JP 4316948 B2 JP4316948 B2 JP 4316948B2 JP 2003207557 A JP2003207557 A JP 2003207557A JP 2003207557 A JP2003207557 A JP 2003207557A JP 4316948 B2 JP4316948 B2 JP 4316948B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- motor
- voltage
- windings
- coil
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Windings For Motors And Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、インバータで駆動されるモータであり、とりわけ集中巻乱巻コイルを用いた低圧モータの構造および製造方法に関するものである。
【0002】
【従来の技術】
近年、省エネルギー化を目的にモータの駆動にインバータ電源が広く用いられている。しかしながら、インバータ電源でモータを駆動した場合、インバータの発する急峻なサージ電圧が原因となり、モータ巻線間に従来の商用周波電源駆動時に比し高い電圧が発生することが報告されている(例えば、非特許文献1参照)。
【0003】
ところで、高圧モータ、高圧発電機などの高圧回転機、高圧変圧器、リアクトルなどの高圧静止誘導機器では、インバータの急峻サージ電圧が問題化する以前から、雷インパルス、真空遮断機の開閉サージなどの高圧サージ電圧に対し電圧分布が広く検討されている(例えば、非特許文献2参照)。具体的には、電磁巻線を巻線間の分布静電容量と巻線各部の対地分布静電容量で形成された回路で近似しユニットステップ電圧を印加したときの電圧分布を計算することで、巻線間の分担電圧を解析できると記されている。
【0004】
また、巻線各部の対地分布静電容量に比し巻線間の分布静電容量を大きく設計すれば、初期電位分布は直線に近づき巻線間の分担電圧は低下する。このため、高圧誘導機器では、巻線各部の対地分布静電容量に比し巻線間の分布静電容量が大きくなるように設計されている。さらに、高圧モータでは、巻線の外部から巻線間の分布静電容量調整用のコンデンサを接続し、巻線間の分担電圧を緩和する方法も提案されている(例えば、特許文献1参照)。なお、三相巻線機器では、図6に示すように、各相の巻線30、40、50の巻き始め31、41、51と巻き終わり32、42、52のコイルの分担電圧が大きくなるため、上記特許文献1では、これらのコイルに巻線間分布静電容量調整用コンデンサを接続することが提案されている。
【0005】
一方、従来、1kVrms未満の低圧モータでは、前述のような急峻サージ電圧に対する巻線間の分担電圧緩和対策は施されていなかった。これは、従来の雷サージや開閉サージなどの高圧サージは低圧モータでは問題にならなかったことの他に、一般に低圧モータではモータ巻線は乱巻、集中巻で製作されるため、巻線間の分布静電容量と巻線各部の対地分布静電容量を制御し、分担電圧を緩和することが困難であったためである。また、集中巻モータでマグネットワイヤを切断しないでコイルを一度に巻く場合には、コイルのシリーズ接続部の導体をモータ製作後に取り出すことができず、この結果、モータ巻線外部に巻線間の分布静電容量調整用のコンデンサを接続できなかったためである。
【0006】
【非特許文献1】
電気学会技術報告第739号、p.14〜20
【非特許文献2】
家田正之著、現代高電圧工学、オーム社、p.91〜93
【特許文献1】
特開昭50−000301号公報
【0007】
【発明が解決しようとする課題】
本発明では、近年、インバータ駆動が盛んに行われている低圧モータにおいて、急峻サージ電圧に対し巻線間の分担電圧を緩和し、巻線間で絶縁劣化が発生すること防止したことを特徴とする低圧モータを提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明の効果は以下の方法により得ることができる。すなわち、スロット内で交互に配列させてモータ巻線の巻回数の1/2回だけそれぞれ巻いた偶数個の導体の一方の導体の巻き始めと他方の導体の巻き終わりを外部で接続して一極分のモータ巻線とし、各モータ巻線の巻き始めと巻き終わりの間に巻線間分布静電容量調整用コンデンサを接続することで実現できる。
【0009】
【発明の実施の形態】
以下、図面を用いて本発明の実施例を説明する。
【0010】
[実施例1]
本発明の実施例1にかかる外部に外部に巻線間分布静電容量調整用コンデンサを接続したモータ巻線の製造方法および構造を説明する。図1〜3にモータ巻線の1相分の製造方法および構造を示す。図1は、モータ巻線の巻回し工程を、図2は、モータ巻線の分離、接続工程を、図3は、外部コンデンサ接続工程および巻線の完成図を示す。なお、いずれも、モータの固定子を内周側から見たときの巻線展開図で示してある。斜線部がモータの固定子コアのティースを示す。
【0011】
図1の巻回し工程では、2本のエナメル電線を同時に巻回し、2本のエナメル線A,Bからなる1極分の巻線11、12および1極分の巻線13、14を製作する。
【0012】
続いて、図2の工程では、巻線11の巻き始め部の2本のエナメル電線A,Bを電線A1と電線B2に、巻線12の巻き終わりの2本のエナメル電線を電線A3と電線B4に二分割し、電線B2と電線A3を溶接、接続して溶接部20を形成する。同様に、巻線13の巻き始め部のエナメル電線A,Bを電線A5と電線B6に、巻線14の巻き終わりのエナメル電線A,Bを電線A7と電線B8に二分割し、電線B6と電線A7を溶接、接続して溶接部22を形成する。さらに、極間接続として、巻線12の巻き終わりの電線B4と巻線13の巻き始めの電線A5を溶接、接続して溶接部21を形成する。
【0013】
図3の工程では、巻線間分布静電容量調整用コンデンサ26〜29を、巻線11の電線A1と溶接部20、溶接部20と溶接部21、溶接部21と溶接部22、溶接部22と巻線14の電線B8と接続し、巻線を製造する。
【0014】
この製造法によって得た巻線の等価回路は、図4となる。すなわち、1相の巻線60は各巻線61〜64から形成される。各巻線61〜64は、インダクタンス65と、巻線間の分布静電容量66と、巻線各部の対地分布静電容量67から形成される。また、図4では巻線間分布静電容量調整用コンデンサは、コンデンサ81〜84として示される。
【0015】
以上の方法で製作したモータに、立上がり時間0.1μsのユニットステップ電圧を印加したときのコイル分担電圧計算結果を、図5に示す。コイル分担電圧には、ユニットステップ電圧印加側第1コイルの値を、ステップ電圧の波高値を100%として示す。コイル分担電圧の計算には図4の等価回路とEMTP(Electro Magnetic Transients Program)を使用した。
【0016】
図5の回路定数は、実機モータの測定結果を基に、巻線間の分布静電容量66を1,000pF、巻線各部の対地分布静電容量を1,000pF、外部に接続する巻線間分布静電容量調整用コンデンサ81〜84の静電容量を1,000pFとし結果した。なお、簡単のため、非特許文献2と同様に、インダクタンス65は開放とし計算した。この結果、後述の従来のモータ巻線構造の比較例1および比較例2に対し、コイル分担電圧を50%低減できた。同時に、モータの耐サージ電圧を従来の比較例1、2に比し2倍に向上させることができ、インバータ駆動時にも巻線間で絶縁劣化が生じにくい、より信頼性の高いモータを提供できる。
【0017】
以上の実施例1では、特に従来のモータ巻線と同じ皮膜厚、材料のマグネットワイヤを使用した場合を基準に、耐サージ電圧を向上させ、信頼性を向上させることができることを示した。しかしながら、特に、マグネットワイヤ間の部分放電電圧に比しコイル分担電圧が小さくなるようにすれば、モータ巻線間で絶縁劣化の発生を防止しつつ、モータの耐サージ電圧を向上させることができる。このため、必要な耐サージ電圧に対し本条件を満足する適切なマグネットワイヤを選択することで、従来のモータに比し占積率を向上させ、モータの寸法を小型化することもできる。
【0018】
以上の実施例1では、特にマグネットワイヤにエナメル電線を使用したが、絹、紙、木綿、ガラスクロスなどを巻き付けた銅線であっても良い。また、エナメル電線にはポリアミドイミド、ポリエステルイミド、ポリイミド、ポリエステル、ホルマール、ポリウレタン、エポキシ、シリコーン、テフロン(登録商標)皮膜などの各種エナメル皮膜電線を使用できる。なお、本発明では、特に電線の表面あるいは絶縁皮膜に着色しておくことが望ましい。これは、本発明の2n個の電線を2分割する際に、分割すべき電線を区別しやすいためである。ただし、特に着色料や塗料を使用しない場合には、テスターで巻線の導通をチェックし、2n個の電線を2分割、接続作業しても良い。
【0019】
[実施例2]
実施例2では、実施例1の巻線間分布静電容量調整用コンデンサを接続しないモータ巻線である。一般に巻線に使用するエナメル電線などのマグネットワイヤの絶縁皮膜厚さは数10μmであり、巻線−コア(対地)間の絶縁物の厚さ数100μmに比し十分薄い。このため、巻線間の分布静電容量を利用できれば、特にモータ外部に巻線間分布静電容量調整用コンデンサを接続しなくとも、モータ巻線間の分担電圧を緩和することができる。
【0020】
実施例2のモータに立上がり時間0.1μSのユニットステップ電圧を印加したときのコイル分担電圧計算結果を図5に示す。巻線間分布静電容量調整用コンデンサを接続しなくとも、従来の比較例1、2に対しコイル分担電圧を37%低減できる。この結果、モータの耐サージ電圧を従来の比較例1、2に比し1.6倍に向上させることができ、インバータ駆動時にも巻線間で絶縁劣化が生じにくい、より信頼性の高いモータを提供できると考えられる。
【0021】
なお、以上の実施例2では、従来に比しモータ巻線の巻き始めと巻き終わり側のコイルの容量結合が強いため、従来に比し巻き始めあるいは巻き終わり側コイルへの高周波電圧の電圧分担集中が低減できたためと考えられる。すなわち、等価回路で考えた場合、本発明のモータ巻線構造では、図4に示すように、巻き始め側から巻き終わり側に巻線間の分布静電容量が直接接続された形となり、巻線の容量性電圧分布が均一となり易い。
【0022】
これに対し、従来のモータ巻線の等価回路を、図7に示す。1相の巻線90は各巻線91〜94から形成され、各巻線91〜94は、インダクタンス95と、各巻線間の分布静電容量96と、巻線各部の対地分布静電容量97から形成される。従来の巻線構造では、モータ巻線間の分布静電容量96が巻初めから巻き終わり側まで直列に接続された形となるため、巻き始め側から巻き終わり側への容量結合が弱くなり、巻き始め側に電圧が多く分担されると考えられる。
【0023】
[比較例1]
従来の集中巻コイルの製造方法でモータ巻線を製作した。モータ巻線には実施例1、2と同じエナメル電線を使用した。また、モータ巻線の外部に巻線間分布静電容量調整用コンデンサは接続していない。
【0024】
比較例1のモータ巻線に立上がり時間0.1μsのユニットステップ電圧を印加したときのコイル分担電圧計算結果を図5に示す。比較例1では、ステップ電圧がほぼ100%、第1コイルに分担されている。このため、比較例1のモータをインバータ駆動する場合には、従来の正弦波駆動時に比し絶縁強化しなければならない。
【0025】
[比較例2]
従来の集中巻コイルの製造方法でモータ巻線を製作した。モータ巻線には実施例1、2と同じエナメル電線を使用した。比較例2では、比較例1のモータ巻線の巻き始めと極間亘り線、極間亘り線と巻き終わりの間に巻線間分布静電容量調整用コンデンサを接続した。
【0026】
比較例2のモータ巻線に立上がり時間0.1μsのユニットステップ電圧を印加したときのコイル分担電圧計算結果を図5に示す。比較例2では、比較例1と同様にステップ電圧がほぼ100%、第1コイルに分担されている。このため、比較例2のモータをインバータ駆動する場合には、従来の正弦波駆動時に比し絶縁強化しなければならない。
【0027】
比較例2において、第1コイルの分担電圧が改善できなかった原因は次のように考えることができる。すなわち、図8の巻線を例に示すと、従来の巻線製造方法のようにマグネットワイヤを切断しないで集中巻コイル111〜114を巻いた場合、モータ外部には極間亘り線120しか現れないため、巻線間の分布静電容量調整用のコンデンサ121、122は巻き始め101と極間亘り線120の間と、極間亘り線120と巻き終わり104の間にしか接続できない。この結果、巻線間の分担電圧が最も大きい巻き始めコイル111と巻き終わりコイル113の巻線間分担電圧を緩和できず、分布静電容量調整用のコンデンサを接続しない比較例1とほぼ同様の分担電圧となったと考えられる。
【0028】
【発明の効果】
以上のように、2n個(nは整数)の導体をモータ巻線の巻回数の1/2回だけ巻いた後、巻き始めと巻き終わりの導体を2分割し、巻き始めのn個と巻き終わりのn個の導体を外部で接続したモータを製作する。また、巻線間分布静電容量調整用コンデンサを接続し、巻線間の分担電圧を改善する場合には、概モータ巻線の巻き始めと巻き終わりの接続部と、巻線の巻き始め部、極間亘り線、巻き終わり部の間にコンデンサを接続することにより、モータ巻線間の分担電圧を緩和することができる。また、同時に、モータの耐サージ電圧を従来に比し向上させることができ、インバータ駆動時にも巻線間で絶縁劣化が生じにくい、より信頼性の高いモータを提供できる。
【図面の簡単な説明】
【図1】本発明のモータ巻線の巻回し工程。
【図2】モータ巻線の分離、接続工程。
【図3】外部コンデンサ接続工程および巻線の完成図。
【図4】本発明のモータ巻線の等価回路。
【図5】ユニットステップ電圧を印加したときのモータ巻線第1コイル分担電圧。
【図6】モータ巻線の巻線図。
【図7】従来のモータ巻線の等価回路。
【図8】従来のモータ巻線および巻線間分布静電容量調整用コンデンサ接続図。
【符号の説明】
A1:モータ巻線11Aの巻き始めの1/2、B2:モータ巻線11Bの巻き始めの1/2、A3:モータ巻線12Aの巻き終わりの1/2、B4:モータ巻線12Bの巻き終わりの1/2、A5:モータ巻線13Aの巻き始めの1/2、B6:モータ巻線13Bの巻き始めの1/2、A7:モータ巻線14Aの巻き終わりの1/2、B8:モータ巻線14Bの巻き終わりの1/2、11:モータ第1巻線、12:モータ第巻線、13:モータ第3巻線、14:モータ第4巻線、20:モータ巻線B2、A3の接続部、21:モータ巻線B4,A5の接続部、22:モータ巻線B6,A7の接続部、26〜29:巻線間分布静電容量調整用コンデンサ、60:モータ巻線1相分、61:モータ第1巻線、62:モータ第巻線、63:モータ第3巻線、64:モータ第4巻線、65:モータ巻線のインダクタンス、66:モータ巻線間の分布静電容量、67:モータ巻線各部の対地間静電容量、71:モータ巻線巻き始め端子、74:モータ巻線巻き終わり端子、80:極間亘り線、81〜84:巻線間分布静電容量調整用コンデンサ、30:U相巻線、31:U相巻き始めコイル、32:U相巻き終わりコイル、40:V相巻線、41:V相巻き始めコイル、42:V相巻き終わりコイル、50:W相巻線、51:W相巻き始めコイル、52:W相巻き終わりコイル、90:モータ巻線1相分、91:モータ第1巻線、92:モータ第2巻線、93:モータ第3巻線、94:モータ第4巻線、95:モータ巻線のインダクタンス、96:モータ巻線間の分布静電容量、97:モータ巻線各部の対地間静電容量、101:モータ巻線巻き始め端子、104:モータ巻線巻き終わり端子、111:モータ第1巻線、112:モータ第2巻線、113:モータ第3巻線、114:モータ第4巻線、120:亘り線、121,122:巻線間分布静電容量調整用コンデンサ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a motor driven by an inverter, and more particularly to a structure and a manufacturing method of a low-voltage motor using concentrated winding random winding coils.
[0002]
[Prior art]
In recent years, inverter power supplies have been widely used to drive motors for the purpose of energy saving. However, when a motor is driven by an inverter power source, it has been reported that a steep surge voltage generated by the inverter causes a higher voltage than the conventional commercial frequency power source driving between the motor windings (for example, Non-patent document 1).
[0003]
By the way, in high-voltage static induction devices such as high-voltage rotating machines such as high-voltage motors and high-voltage generators, high-voltage transformers, and reactors, lightning impulses, open / close surges of vacuum circuit breakers, etc., even before the steep surge voltage of the inverter became a problem. A voltage distribution has been widely studied with respect to a high-voltage surge voltage (for example, see Non-Patent Document 2). Specifically, the electromagnetic winding is approximated by a circuit formed by the distributed capacitance between the windings and the ground distributed capacitance of each part of the winding, and the voltage distribution when the unit step voltage is applied is calculated. It is described that the shared voltage between windings can be analyzed.
[0004]
Furthermore, if the distribution capacitance of the designed larger between the winding relative to earth distributed capacitance of the winding each unit, the initial potential distribution is shared voltage between windings closer to the straight line decreases. Therefore, in the high-pressure induction device is designed so that the distribution capacitance between ground distribution capacitance than the winding of the winding each unit is increased. Furthermore, in a high-voltage motor, a method of relaxing a shared voltage between windings by connecting a capacitor for adjusting distributed capacitance between windings from the outside of the windings has been proposed (see, for example, Patent Document 1). . In the three-phase winding device, as shown in FIG. 6, the shared voltage of the
[0005]
On the other hand, conventionally, in the low voltage motor of less than 1 kVrms, the above-described countermeasure for relaxing the shared voltage between the windings against the steep surge voltage has not been taken. This is because conventional high-voltage surges such as lightning surges and switching surges were not a problem for low-voltage motors. In general, motor windings are manufactured with random windings and concentrated windings for low-voltage motors. This is because it was difficult to control the distributed electrostatic capacity and the ground distributed electrostatic capacity of each part of the winding to alleviate the shared voltage. In addition, when a coil is wound at once without cutting the magnet wire with a concentrated winding motor, the conductor of the coil series connection part cannot be taken out after the motor is manufactured. This is because the capacitor for adjusting the distributed capacitance could not be connected.
[0006]
[Non-Patent Document 1]
IEEJ Technical Report No. 739, p. 14-20
[Non-Patent Document 2]
Masayuki Ieda, Contemporary High Voltage Engineering, Ohmsha, p. 91-93
[Patent Document 1]
Japanese Patent Laid-Open No. 50-000301
[Problems to be solved by the invention]
The present invention is characterized in that, in a low-voltage motor that has been actively driven by an inverter in recent years, the voltage sharing between the windings is reduced with respect to the steep surge voltage to prevent the insulation deterioration between the windings. An object of the present invention is to provide a low-voltage motor.
[0008]
[Means for Solving the Problems]
The effects of the present invention can be obtained by the following method. In other words, the winding start of one conductor and the winding end of the other conductor of an even number of conductors , which are alternately arranged in the slot and respectively wound by half the number of windings of the motor winding, are connected to each other externally. This can be realized by setting the motor winding as a pole and connecting the inter-winding distributed capacitance adjusting capacitor between the winding start and winding end of each motor winding.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
[Example 1]
A method and structure for manufacturing a motor winding in which a capacitor for adjusting distributed capacitance between windings is connected to the outside according to the first embodiment of the present invention will be described. 1-3 show the manufacturing method and structure for one phase of the motor winding. 1 shows the winding process of the motor winding, FIG. 2 shows the separation and connection process of the motor winding, and FIG. 3 shows the external capacitor connecting process and the completed drawing of the winding. In addition, all are shown in the coil | winding expansion | deployment figure when seeing the stator of a motor from the inner peripheral side. The shaded area indicates the teeth of the stator core of the motor.
[0011]
In the winding process of FIG. 1, two enamel wires are wound at the same time to produce one-
[0012]
Subsequently, in the process of FIG. 2, the two enamel wires A and B at the winding start portion of the winding 11 are connected to the wires A1 and B2, and the two enamel wires at the end of winding of the winding 12 are connected to the wire A3 and the wires. It divides into B4 and welds and connects the electric wire B2 and the electric wire A3 to form the
[0013]
3, the inter-winding distributed
[0014]
An equivalent circuit of the winding obtained by this manufacturing method is shown in FIG. That is, the one-phase winding 60 is formed from the windings 61 to 64. Each of the windings 61 to 64 is formed of an
[0015]
FIG. 5 shows a calculation result of the coil sharing voltage when a unit step voltage having a rise time of 0.1 μs is applied to the motor manufactured by the above method. In the coil sharing voltage, the value of the unit step voltage application side first coil is shown with the step voltage peak value being 100%. The equivalent circuit of FIG. 4 and EMTP (Electro Magnetic Transients Program) were used for the calculation of the coil sharing voltage.
[0016]
The circuit constants in FIG. 5 are based on the measurement results of the actual motor, the distributed capacitance 66 between the windings is 1,000 pF, the ground distributed capacitance of each part of the winding is 1,000 pF, and the windings connected to the outside As a result, the capacitance of the inter-distribution capacitance adjusting capacitors 81 to 84 was set to 1,000 pF. For simplicity, calculation was performed with the
[0017]
In the above-mentioned Example 1, it was shown that the surge voltage can be improved and the reliability can be improved with reference to the case where a magnet wire having the same film thickness and material as the conventional motor winding is used. However, in particular, if the coil-sharing voltage is made smaller than the partial discharge voltage between the magnet wires, the surge voltage of the motor can be improved while preventing the occurrence of insulation deterioration between the motor windings. . For this reason, by selecting an appropriate magnet wire that satisfies this condition with respect to the necessary surge withstand voltage, the space factor can be improved as compared with the conventional motor, and the size of the motor can be reduced.
[0018]
In the above-described Example 1, an enameled wire is used for the magnet wire, but a copper wire wrapped with silk, paper, cotton, glass cloth or the like may be used. In addition, various enamel-coated wires such as polyamideimide, polyesterimide, polyimide, polyester, formal, polyurethane, epoxy, silicone, and Teflon (registered trademark) film can be used for the enameled wire. In the present invention, it is particularly desirable to color the surface of the electric wire or the insulating film. This is because it is easy to distinguish the electric wires to be divided when dividing the 2n electric wires of the present invention into two. However, when no colorant or paint is used, the continuity of the winding may be checked with a tester, and 2n wires may be divided into two and connected.
[0019]
[Example 2]
The second embodiment is a motor winding in which the inter-winding distributed capacitance adjusting capacitor of the first embodiment is not connected. In general, the thickness of an insulating film of a magnet wire such as an enamel wire used for a winding is several tens of μm, which is sufficiently thinner than a thickness of several hundreds of μm of an insulator between the winding and the core (ground). For this reason, if the distributed electrostatic capacitance between the windings can be used, the shared voltage between the motor windings can be relaxed without connecting the inter-winding distributed capacitance adjusting capacitor outside the motor.
[0020]
FIG. 5 shows a calculation result of the coil sharing voltage when a unit step voltage having a rise time of 0.1 μS is applied to the motor of the second embodiment. Even if the inter-winding distributed capacitance adjusting capacitor is not connected, the coil sharing voltage can be reduced by 37% compared to the conventional comparative examples 1 and 2. As a result, the surge withstand voltage of the motor can be improved by 1.6 times compared to the conventional comparative examples 1 and 2, and a more reliable motor that hardly causes insulation deterioration between the windings even when the inverter is driven. Can be provided.
[0021]
In the second embodiment, since the capacitive coupling of the coil at the start and end of winding of the motor winding is stronger than in the conventional case, the voltage sharing of the high-frequency voltage to the coil at the start or end of winding is greater than in the conventional case. It is thought that concentration was reduced. That is, in the case of an equivalent circuit, in the motor winding structure of the present invention, as shown in FIG. 4, the distributed capacitance between the windings is directly connected from the winding start side to the winding end side. The capacitive voltage distribution of the line tends to be uniform.
[0022]
In contrast, FIG. 7 shows an equivalent circuit of a conventional motor winding. The one-phase winding 90 is formed of windings 91 to 94, and the windings 91 to 94 are formed of an
[0023]
[Comparative Example 1]
The motor winding was manufactured by the conventional concentrated winding coil manufacturing method. The same enameled wire as in Examples 1 and 2 was used for the motor winding. Further, no interwinding distributed capacitance adjusting capacitor is connected outside the motor winding.
[0024]
FIG. 5 shows a calculation result of the coil shared voltage when a unit step voltage having a rise time of 0.1 μs is applied to the motor winding of Comparative Example 1. In Comparative Example 1, the step voltage is almost 100% and is shared by the first coil. For this reason, when the motor of the comparative example 1 is driven by an inverter, the insulation must be reinforced compared to the conventional sine wave drive.
[0025]
[Comparative Example 2]
The motor winding was manufactured by the conventional concentrated winding coil manufacturing method. The same enameled wire as in Examples 1 and 2 was used for the motor winding. In Comparative Example 2, the inter-winding distributed capacitance adjusting capacitor was connected between the winding start of the motor winding of Comparative Example 1 and the inter-electrode crossing wire, and between the inter-electrode crossing wire and the winding end.
[0026]
FIG. 5 shows the calculation result of the coil sharing voltage when a unit step voltage having a rise time of 0.1 μs is applied to the motor winding of Comparative Example 2. In Comparative Example 2, as in Comparative Example 1, the step voltage is almost 100% shared by the first coil. For this reason, when the motor of the comparative example 2 is driven by an inverter, the insulation must be reinforced as compared with the conventional sine wave drive.
[0027]
In Comparative Example 2, the reason why the shared voltage of the first coil could not be improved can be considered as follows. That is, when the winding of FIG. 8 is shown as an example, when the concentrated winding coils 111 to 114 are wound without cutting the magnet wire as in the conventional winding manufacturing method, only the
[0028]
【The invention's effect】
As described above, after winding 2n conductors (n is an integer) by half the number of windings of the motor winding, the winding start and end conductors are divided into two, and the winding start n windings A motor in which the last n conductors are connected externally is manufactured. In addition, when connecting a distributed capacitance adjusting capacitor between windings to improve the shared voltage between windings, the connection part at the beginning and end of winding of the motor winding, and the winding start part of the winding By connecting a capacitor between the inter-electrode crossing line and the winding end part, it is possible to relax the voltage sharing between the motor windings. At the same time, the surge voltage of the motor can be improved as compared with the conventional one, and a more reliable motor can be provided in which insulation deterioration is unlikely to occur between the windings even when the inverter is driven.
[Brief description of the drawings]
FIG. 1 shows a winding process of a motor winding according to the present invention.
FIG. 2 shows motor winding separation and connection process.
FIG. 3 is a completed drawing of an external capacitor connection process and windings.
FIG. 4 is an equivalent circuit of a motor winding according to the present invention.
FIG. 5 shows a motor winding first coil shared voltage when a unit step voltage is applied.
FIG. 6 is a winding diagram of a motor winding.
FIG. 7 is an equivalent circuit of a conventional motor winding.
FIG. 8 is a connection diagram of a conventional motor winding and a capacitor for adjusting distributed capacitance between windings.
[Explanation of symbols]
A1: 1/2 of winding start of motor winding 11A, B2: 1/2 of winding start of motor winding 11B, A3: 1/2 of winding end of motor winding 12A, B4: winding of motor winding 12B 1/2 of the end, A5: 1/2 of the winding start of the motor winding 13A, B6: 1/2 of the winding start of the motor winding 13B, A7: 1/2 of the winding end of the motor winding 14A, B8: 1/2 of the winding end of the motor winding 14B, 11: motor first winding, 12: motor winding, 13: motor third winding, 14: motor fourth winding, 20: motor winding B2, Connection part of A3, 21: Connection part of motor windings B4 and A5, 22: Connection part of motor windings B6 and A7, 26-29: Capacitor for adjusting distributed capacitance between windings, 60: Motor winding 1 Phase: 61: Motor first winding, 62: Motor winding, 63: Motor first Winding, 64: Fourth motor winding, 65: Inductance of motor winding, 66: Distributed capacitance between motor windings, 67: Capacitance between each part of motor windings, 71: Motor winding winding Start terminal, 74: Motor winding end terminal, 80: Spacing wire, 81-84: Inter-winding distributed capacitance adjusting capacitor, 30: U phase winding, 31: U phase winding start coil, 32 : U-phase winding end coil, 40: V-phase winding, 41: V-phase winding start coil, 42: V-phase winding end coil, 50: W-phase winding, 51: W-phase winding start coil, 52: W-phase winding End coil, 90: Motor winding for one phase, 91: Motor first winding, 92: Motor second winding, 93: Motor third winding, 94: Motor fourth winding, 95: Motor winding Inductance, 96: Distributed capacitance between motor windings, 97: Motor 101: Motor winding winding start terminal, 104: Motor winding winding end terminal, 111: Motor first winding winding, 112: Motor second winding, 113: Motor third winding 114: motor fourth winding, 120: crossover wire, 121, 122: inter-winding distributed capacitance adjusting capacitor
Claims (3)
各モータ巻線の巻き始めと巻き終わりの間に巻線間分布静電容量調整用コンデンサを接続した
ことを特徴とする低圧モータ。 One pole by connecting the winding start of one conductor and the winding end of the other conductor of the even number of conductors , which are alternately arranged in the slot and wound respectively by half the number of windings of the motor winding. And the motor winding
A low-voltage motor characterized in that a capacitor for adjusting a distributed capacitance between windings is connected between the winding start and winding end of each motor winding .
ことを特徴とする請求項1記載の低圧モータ。The even number of conductors are wound by different numbers of poles, and the end of winding of one pole and the beginning of winding of the other pole are connected externally between each pole. The low-pressure motor according to claim 1, wherein
ことを特徴とする請求項1または請求項2記載の低圧モータ。 Colored on the surface or insulation film of an even number of conductors and used to distinguish one conductor from the other when connecting the beginning of winding of one conductor and the end of winding of the other conductor outside The low-pressure motor according to claim 1 or 2, characterized by the above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003207557A JP4316948B2 (en) | 2003-08-14 | 2003-08-14 | Low pressure motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003207557A JP4316948B2 (en) | 2003-08-14 | 2003-08-14 | Low pressure motor |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005065363A JP2005065363A (en) | 2005-03-10 |
JP2005065363A5 JP2005065363A5 (en) | 2005-10-20 |
JP4316948B2 true JP4316948B2 (en) | 2009-08-19 |
Family
ID=34363987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003207557A Expired - Fee Related JP4316948B2 (en) | 2003-08-14 | 2003-08-14 | Low pressure motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4316948B2 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4909573B2 (en) * | 2005-06-17 | 2012-04-04 | 日立オートモティブシステムズ株式会社 | Rotating electric machine and manufacturing method thereof |
JP4908847B2 (en) * | 2006-01-05 | 2012-04-04 | 株式会社日立製作所 | Rotating electric machine |
JP4904989B2 (en) * | 2006-08-24 | 2012-03-28 | 株式会社日立製作所 | Rotating electrical machines, winding machines, rotating electrical machine systems, hybrid vehicles, fuel cell vehicles, and electric vehicles |
JP5227104B2 (en) * | 2008-07-25 | 2013-07-03 | トヨタ自動車株式会社 | Interphase insulating material |
JP5890708B2 (en) * | 2012-03-01 | 2016-03-22 | トヨタ自動車株式会社 | Segment coil, segment coil manufacturing method, stator manufacturing method, and stator |
US9755469B2 (en) | 2011-10-27 | 2017-09-05 | Toyota Jidosha Kabushiki Kaisha | Segment coil, stator including segment coil, and method of manufacturing segment coil |
CN103931084B (en) | 2011-10-27 | 2017-09-01 | 丰田自动车株式会社 | Sectional coil, the manufacture method of sectional coil, the stator using sectional coil |
JP6004819B2 (en) * | 2012-08-07 | 2016-10-12 | 株式会社日立産機システム | Rotating electric machine and coil manufacturing method |
DE112014006576B4 (en) | 2014-04-08 | 2022-12-01 | Mitsubishi Electric Corporation | engine |
DE102018207231A1 (en) * | 2018-05-09 | 2019-11-14 | Volkswagen Aktiengesellschaft | Stator for an electric machine, electric machine and manufacturing method for a stator for an electric machine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5655025A (en) * | 1979-10-11 | 1981-05-15 | Matsushita Electric Ind Co Ltd | Winding method of wire wound electric machine |
JPH0210707A (en) * | 1988-06-28 | 1990-01-16 | Tokin Corp | Method of winding coil for producing magnetic field |
JPH0750141A (en) * | 1993-08-03 | 1995-02-21 | Mitsubishi Electric Corp | Deflection yoke |
-
2003
- 2003-08-14 JP JP2003207557A patent/JP4316948B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2005065363A (en) | 2005-03-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5949170A (en) | Method and apparatus for reducing voltage stresses in electric machine | |
KR101247085B1 (en) | Two conductor winding for an induction motor circuit | |
US7990242B2 (en) | Transient voltage and harmonic currents quashing (THQ) transformers, transformer winding topology, and method of making the same | |
JP4316948B2 (en) | Low pressure motor | |
US11722026B2 (en) | Fault tolerant rotating electric machine | |
JP2001505758A (en) | Apparatus and method for protecting objects against overcurrent by overcurrent reduction and current limiting | |
JP6059066B2 (en) | Stator winding, and stator and rotating electric machine including the same | |
US7952251B2 (en) | Systems and methods for shielding an electric machine | |
JPH10112948A (en) | Bipolar armature winding of rotating electric machine and its manufacture | |
CN107017709A (en) | Motor stator, magneto and compressor | |
WO2016015909A1 (en) | Method of connecting a power converter to an electrical machine and a power system comprising a power converter and an electrical machine | |
CN204993001U (en) | Energy -efficient novel AC motor | |
CN105207437B (en) | A kind of alternating current generator | |
JP5997558B2 (en) | Rotating electric machine | |
CN107425625A (en) | A kind of motor and compressor | |
JP6173842B2 (en) | Rotating electric machine | |
US6081080A (en) | Method and apparatus for reducing voltage stresses in electric machines | |
CN114268175B (en) | Ultrahigh-voltage multiphase permanent magnet wind driven generator and power generation system | |
WO2023082263A1 (en) | Motor stator, variable frequency motor, and manufacturing method for motor stator | |
CN218976446U (en) | Lead structure of same-phase two sets of stator windings of permanent magnet wind driven generator | |
JP2017073893A (en) | Three phase ac dynamo-electric machine | |
KR20240006322A (en) | 3 phase motor | |
JP2012120405A (en) | Three-phase ac motor | |
JPH06311712A (en) | Two-phase motor | |
CN115967214A (en) | Lead method for two sets of stator windings with same phase of permanent magnet wind driven generator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050616 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050616 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080624 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080825 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090203 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090402 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20090519 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20090521 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 4316948 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120529 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130529 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130529 Year of fee payment: 4 |
|
LAPS | Cancellation because of no payment of annual fees |