JP2007116762A - Motor - Google Patents
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- JP2007116762A JP2007116762A JP2005302553A JP2005302553A JP2007116762A JP 2007116762 A JP2007116762 A JP 2007116762A JP 2005302553 A JP2005302553 A JP 2005302553A JP 2005302553 A JP2005302553 A JP 2005302553A JP 2007116762 A JP2007116762 A JP 2007116762A
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- motor
- neutral point
- noise
- terminal voltage
- phase winding
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- Brushless Motors (AREA)
Abstract
Description
本発明は、星形結線を有したモータに関する。 The present invention relates to a motor having a star connection.
電源内部で発生したノイズが、電源の出力を通して他機器の回路の電源系統に流入したものを雑音端子電圧と呼んでいるが、この雑音端子電圧はノイズ源となる為、電磁妨害を引き起こし周辺機器に悪影響を与える。 The noise generated inside the power supply that flows into the power supply system of the circuit of other equipment through the output of the power supply is called the noise terminal voltage, but this noise terminal voltage becomes a noise source, causing electromagnetic interference and peripheral equipment. Adversely affects.
モータが取り付けられる実機が小型化されており、モータと他の機器との距離が近くなる為、モータ自身のＥＭＩ対策が重要視される。その一つとして、雑音端子電圧の低減がある。 Since the actual machine to which the motor is attached has been reduced in size and the distance between the motor and other equipment has become closer, the EMI countermeasures of the motor itself are regarded as important. One of them is reduction of noise terminal voltage.
雑音端子電圧の低減方法として、様々なノイズフィルタが用いられる（例えば、特許文献１参照）。
解決しようとする問題点は、ＥＭＩ対策としてモータの雑音端子電圧を低減させることである。一般的に雑音端子電圧を低減させる為にフィルターを用いるが素子数が多く回路が複雑になり、コストも上がってしまう。 The problem to be solved is to reduce the noise terminal voltage of the motor as a measure against EMI. In general, a filter is used to reduce the noise terminal voltage. However, the number of elements increases, the circuit becomes complicated, and the cost increases.
本発明は上記従来の課題を解決するものであり、雑音端子電圧を低減させ信頼性の高いモータを提供することを目的とする。 The present invention solves the above-described conventional problems, and an object thereof is to provide a highly reliable motor by reducing a noise terminal voltage.
上記課題を解決するために本発明は、星形結線された複数の相巻線を有するモータの各相巻線の中性点と直流電源のマイナス端子との間にコンデンサを挿入することで雑音端子電圧を低減させ、信頼性に優れたモータを得ることができる。 In order to solve the above-described problems, the present invention provides noise by inserting a capacitor between the neutral point of each phase winding of a motor having a plurality of phase windings connected in a star shape and the negative terminal of the DC power supply. A terminal voltage can be reduced and a motor with excellent reliability can be obtained.
本発明のモータによれば、星形結線された複数の相巻線を有するものであれば、各相巻線の中性点と直流電源のマイナス端子との間にコンデンサを挿入することにより、雑音端子電圧を低減することが出来る。 According to the motor of the present invention, if it has a plurality of phase windings connected in a star shape, by inserting a capacitor between the neutral point of each phase winding and the negative terminal of the DC power supply, Noise terminal voltage can be reduced.
また、星形結線された複数の相巻線を有するステータが樹脂で覆われたモールド型のモータでも、各相巻線の中性点と直流電源のマイナス端子との間にコンデンサを挿入することにより、雑音端子電圧を低減することが出来る。 In addition, even in a molded motor in which a stator having a plurality of phase windings connected in a star shape is covered with resin, a capacitor must be inserted between the neutral point of each phase winding and the negative terminal of the DC power supply. Thus, the noise terminal voltage can be reduced.
したがって、雑音端子電圧を低減させ信頼性に優れたモータを提供することができる。 Therefore, it is possible to provide a motor with reduced noise terminal voltage and excellent reliability.
モータ基板に中性点端子をハンダ付け出来る様な穴、ランドを設け、セラミックチップコンデンサを実装できるようにレイアウトしコンデンサの端子と中性点２、直流電源のマイナス端子とを結線したものである。 The motor board is provided with holes and lands for soldering the neutral point terminals, laid out so that ceramic chip capacitors can be mounted, and the capacitor terminals are connected to the neutral point 2 and the DC power supply negative terminal. .
または、セラミックチップコンデンサの変わりにフィルムコンデンサを使用したもので
ある。
Alternatively, a film capacitor is used instead of a ceramic chip capacitor.
図１は、本発明の実施例の断面図であり、１〜４は図２と同様である。また、５は制御基板、６は樹脂モールドである。
図２の７は交流電源、８は直流電源、９はスイッチング素子部、１０は制御部である。
FIG. 1 is a cross-sectional view of an embodiment of the present invention, and 1-4 are the same as those in FIG. Reference numeral 5 is a control board, and 6 is a resin mold.
In FIG. 2, 7 is an AC power source, 8 is a DC power source, 9 is a switching element unit, and 10 is a control unit.
ブラシレスＤＣモータ１はステータを樹脂で覆い、その樹脂６を外殻としたＤＣブラシレスモータで星形結線の三相巻線４を有している。また、モータ１の制御部である制御基板５はモータ１に内蔵されている。 The brushless DC motor 1 is a DC brushless motor in which the stator is covered with resin and the resin 6 is used as an outer shell, and has a three-phase winding 4 having a star connection. A control board 5 which is a control unit of the motor 1 is built in the motor 1.
交流電源７から整流回路である直流電源８を介しスイッチング素子部９に電圧が印加される。また、制御部１０によって三相巻線４の各相への通電を制御している。
その為、直流電源８内部で発生したノイズ（雑音端子電圧）は三相巻線にも伝播する。
A voltage is applied from the AC power supply 7 to the switching element unit 9 via the DC power supply 8 that is a rectifier circuit. The controller 10 controls the energization of each phase of the three-phase winding 4.
Therefore, noise (noise terminal voltage) generated inside the DC power supply 8 is also propagated to the three-phase winding.
そこで、三相巻線４の中性点２と直流電源８のマイナス端子との間にコンデンサ３を挿入することにより三相巻線４の中性点でノイズを吸収するので、ＤＣブラシレスモータ１全体の雑音端子電圧を低減できる。 Therefore, noise is absorbed at the neutral point of the three-phase winding 4 by inserting the capacitor 3 between the neutral point 2 of the three-phase winding 4 and the negative terminal of the DC power supply 8, so that the DC brushless motor 1 The overall noise terminal voltage can be reduced.
中性点２からコンデンサ３を介し接地を行うと中性点２の電圧が不安定となり、スイッチング素子の破壊を招く恐れがある為、中性点２と直流電源８のマイナス端子の間にコンデンサ３を挿入する。 If grounding is performed from the neutral point 2 through the capacitor 3, the voltage at the neutral point 2 becomes unstable and may cause destruction of the switching element. Therefore, the capacitor between the neutral point 2 and the negative terminal of the DC power supply 8 may be used. 3 is inserted.
スイッチング素子部９にはＦＥＴを示しているが、トランジスタ、ＩＧＢＴなどの素子についても使用可能である。 Although an FET is shown in the switching element section 9, elements such as a transistor and an IGBT can also be used.
ＤＣブラシレスモータ１はステータが樹脂で覆われ、その樹脂が外殻となっている構造を例としたが、外殻が鋼板で覆われた構造のモータを採用しても良い。
つまり、星形結線された複数の相巻線を有するモータであれば、モータ構造を問わず使用できる。
The DC brushless motor 1 has a structure in which the stator is covered with resin and the resin is an outer shell. However, a motor having a structure in which the outer shell is covered with a steel plate may be adopted.
That is, a motor having a plurality of phase windings connected in a star shape can be used regardless of the motor structure.
その他、本発明は上記形態に限定されるものではなく、趣旨を逸脱しない範囲であれば構成要素を変形、組み換え、削除などを行っても適用できる。 In addition, the present invention is not limited to the above-described embodiment, and can be applied even if the components are modified, recombined, deleted, or the like as long as they do not depart from the spirit.
本発明のモータは、雑音端子電圧の低減に最適であり、様々な実機、電源で使用されるモータに有用である。 The motor of the present invention is optimal for reducing the noise terminal voltage, and is useful for motors used in various actual machines and power supplies.
１ ＤＣブラシレスモータ
２ 三相巻線の中性点
３ 雑音端子電圧低減用コンデンサ
４ 三相巻線
５ 制御基板
６ モールド樹脂
７ 交流電源
８ 直流電源（整流回路）
９ スイッチング素子部（ＦＥＴ）
１０制御部
1 DC brushless motor 2 Neutral point of three-phase winding 3 Noise terminal voltage reduction capacitor 4 Three-phase winding 5 Control board 6 Mold resin 7 AC power supply 8 DC power supply (rectifier circuit)
9 Switching element (FET)
10 control unit
Claims (3)
The motor according to claim 1, wherein the motor control board is built in, and the neutral point and the board can be soldered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005302553A JP2007116762A (en) | 2005-10-18 | 2005-10-18 | Motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005302553A JP2007116762A (en) | 2005-10-18 | 2005-10-18 | Motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2007116762A true JP2007116762A (en) | 2007-05-10 |
Family
ID=38098441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005302553A Withdrawn JP2007116762A (en) | 2005-10-18 | 2005-10-18 | Motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2007116762A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05308741A (en) * | 1992-04-28 | 1993-11-19 | Shibaura Eng Works Co Ltd | Three-phase motor |
| JPH1056765A (en) * | 1996-08-08 | 1998-02-24 | Kokusan Denki Co Ltd | Dc brushless motor |
| JPH10174338A (en) * | 1996-12-06 | 1998-06-26 | Matsushita Electric Ind Co Ltd | Stator of motor |
| JPH10337087A (en) * | 1997-06-03 | 1998-12-18 | Fuji Electric Co Ltd | Single phase-multiphase power converting circuit |
| JP2004350384A (en) * | 2003-05-21 | 2004-12-09 | Nidec Shibaura Corp | Motor |
-
2005
- 2005-10-18 JP JP2005302553A patent/JP2007116762A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05308741A (en) * | 1992-04-28 | 1993-11-19 | Shibaura Eng Works Co Ltd | Three-phase motor |
| JPH1056765A (en) * | 1996-08-08 | 1998-02-24 | Kokusan Denki Co Ltd | Dc brushless motor |
| JPH10174338A (en) * | 1996-12-06 | 1998-06-26 | Matsushita Electric Ind Co Ltd | Stator of motor |
| JPH10337087A (en) * | 1997-06-03 | 1998-12-18 | Fuji Electric Co Ltd | Single phase-multiphase power converting circuit |
| JP2004350384A (en) * | 2003-05-21 | 2004-12-09 | Nidec Shibaura Corp | Motor |
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