JPS60216758A - Commutatorless rotation of dc coil and commutatorless dc motor - Google Patents

Abstract

PURPOSE:To eliminate wear and noise by continuously rotating a magnet itself while flowing a current of the prescribed direction always to a coil without providing a commutator. CONSTITUTION:A magnetic shielding core 10 is composed by providing upper and lower discs 7, 8 of permalloy having an axial hole formed at the center, slots formed at the inner and outer peripheral surfaces and large magnetic permeability, and an intermediate disc 9 of permalloy formed with an insulating film R including the same shape as the discs 7, 8 between the discs 7 and 8, and bonding the disc 9 between the discs 7 and 8. A toroidal coil 11 is wound between the slots 5 and 6 of the core 10, and a current is flowed from a DC power source E through a slip ring 16 secured to a rotational shaft 13 to the coil 11. Permanent magnets 21, 22 are mounted in an external case 17 oppositely to the upper and lower portions of the core 10 in the same polarity. Thus, the upper and lower magnetic fields are spaced at the intermediate of the core 10, and the core 10 can be rotated in the prescribed direction by flowing the current to the coil 11.

Description

【発明の詳細な説明】 本発明は、−整流子を設けることなく、コイルに一定方
向の直流電流を流し、磁界中でコイルを又は磁界を発生
する磁石自体をコイルに対し連続回転さゼる方法及び無
整流直流モーターに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides: - A direct current is passed through a coil in a fixed direction without providing a commutator, and the coil or the magnet itself that generates the magnetic field is continuously rotated relative to the coil in a magnetic field. The present invention relates to a method and a non-commutated DC motor.

従来のコイルの回転方法は第１図に示すように、各コイ
ル端（イ）（ロ）を各々整流子片（ハ）（ニ）接続した
コイル（ボ）を回転軸（へ）に固定して、Ｎ極磁石（ト
）とＳ極磁石（チ）を対向させて作り出した磁界中に置
き、整流子片（ハ）（ニ）に圧接するブラシ（す）（ヌ
）を介し、外部直流電源Ｅより、］コイルホ）に電流を
流し、コイル（ホ）に発生する力によってコイル（ホ〉
を回転させている。この方法により直流モーターは動作
し−（いるが、この方法では連続した回転力を発生させ
るためには各コイル（ホ）辺が、磁極間で回転して、ち
ょうどＮ極とＳ極の中間位置に来たときに、各コイル（
ホ）辺にそれまで流れていた電流の向きを反転づる装置
即ち整流子が不可欠で−ある。As shown in Figure 1, the conventional method of rotating a coil is to fix the coil (bo), which has each coil end (a) and (b) connected to commutator pieces (c) and (d), to a rotating shaft (b). The N-pole magnet (G) and the S-pole magnet (H) are placed in a magnetic field created by facing each other, and external DC From the power source E, a current is passed through the coil (E), and the force generated in the coil (E) causes the coil (E) to
is rotating. With this method, a DC motor operates, but in order to generate continuous rotational force, each coil (e) side rotates between the magnetic poles and is positioned exactly midway between the north and south poles. When it comes to each coil (
e) A device that reverses the direction of the current that was previously flowing on the side, that is, a commutator, is essential.

この整流子は機能上、各整流子片（ハ）（ニ）が互いに
絶縁されていなければならず、実際のモーターではコイ
ル数が多いので、整流子は多数の整流子片（ハ）（ニ）
よりなる円筒形で、各整流子片（ハ）（ニ）間に、アン
ダーカットした絶縁物を挾み込んだものとなっている。Functionally, the commutator pieces (c) and (d) must be insulated from each other, and since an actual motor has many coils, the commutator has many commutator pieces (c) and (d). )
It has a cylindrical shape with an undercut insulator sandwiched between each commutator piece (c) and (d).

このためブラシ（す）（ヌ）との接触面は平滑面ではな
く凹凸面となり、回転する整流子の凹凸面に圧接される
ブラシ（す）（ヌ）は摩耗が激しいとともに、整流子が
ノイズの発生原因どもなっている。For this reason, the contact surface with the brushes (su) (nu) is not a smooth surface but an uneven surface, and the brushes (su) (nu) that are pressed against the uneven surface of the rotating commutator are subject to severe wear, and the commutator is noisy. It is also the cause of this.

つまり従来のコイル回転法では、整流子が不可欠である
ために、その方法によって動作する直流モーターには、
ノイズやブラシの激しい摩耗といった種々の不都合が生
じていた。In other words, in the conventional coil rotation method, a commutator is essential, so a DC motor operated by that method has
Various inconveniences such as noise and severe wear of the brushes occurred.

そこで本発明は整流子を設けることなく、つまりコイル
の電流を反転させることなく、常にコイルに一定方向の
電流を流しながら、磁界中でコイルに又はコイルに対し
磁界を発生する磁石自体に連続的な回転を行わせる直流
コイル無整流回転方法及び無整流直流モーターを提供せ
んとするものである。Therefore, the present invention provides continuous current flow to the coil itself without providing a commutator, that is, without reversing the current in the coil. It is an object of the present invention to provide a non-commutated DC coil rotation method and a non-commutated DC motor that rotate a DC coil.

本発明のモーターの実施例につき第２図乃至第６図に基
づき説明する。Embodiments of the motor of the present invention will be explained based on FIGS. 2 to 6.

本発明の無整流直流モーターＡは、第２図乃至第３図に
示すよう中央部に軸穴１及びこれを囲繞点在するガイド
穴２を穿設し、内周面３と外周面４には適宜数の対応す
る内周スＬ１ツト５と外周スロット６を周方向等間隔に
刻設した透磁率の大きい例えばパーマロイ系上円盤７と
−１・円１Ｊ８８間に、上、上円盤７．８と同径かつ同
形で例えばエポキシ樹脂のような絶縁樹脂を直接又は必
要に応じ紙を介して少なくとし接合面全域に亘すコーテ
ィングし絶縁膜Ｒを形成した例えばパーマロイ系中間円
盤９をザンドイッチ積層上に挾み、各々接着固定した磁
気シールドコア１０の各対応する内周スロワ１〜５と外
周スロット６に亘り、コイルを適宜回数放射状に巻架し
樹脂固定して一体としたトロイダルコイル１１を固定リ
ング１２の結束突起１−２′群を対応するカイト穴２群
に挿込むか、固定リング１２を省略して直接接着剤で非
磁性体の回転軸１３に固定し、又回転軸１３の下部には
、トロイダルコイル１１の始端１４と終端１５を接続す
るスリップリング１６を固定してなる回転子αと、第４
図に示すよう円筒形継鉄固定子枠の外部ケース１７の上
面と下面中央に軸受１８を貫着し又、外部ケース１７の
内部上面１９．下面２０に同極面を対向してドーナツ円
盤型の上、下永久磁石２１．２２を固着し、更に前記回
転子αのスリップリング１６に接する位置で外部ケース
１７内部下面２０にブラシ２３を固定し、外部端子２４
に接続した固定子βよりなる。As shown in FIGS. 2 and 3, the non-rectified DC motor A of the present invention has a shaft hole 1 in the center and guide holes 2 dotted around the shaft hole, and an inner circumferential surface 3 and an outer circumferential surface 4. The upper disk 7. is placed between the upper disk 7 made of, for example, permalloy, which has high magnetic permeability and has an appropriate number of corresponding inner circumferential slots 5 and outer circumferential slots 6 carved at equal intervals in the circumferential direction, and -1.circle 1J88. For example, a permalloy intermediate disk 9 having the same diameter and shape as 8 and having an insulating film R coated with an insulating resin such as epoxy resin directly or through paper as necessary over the entire joint surface is laminated by Zandwich. A toroidal coil 11 is formed by winding the coil radially an appropriate number of times and fixing it with resin over each of the corresponding inner circumferential throwers 1 to 5 and outer circumferential slot 6 of the magnetic shield core 10 which is sandwiched and fixed with adhesive. Insert the binding protrusions 1-2' of the fixing ring 12 into the corresponding kite holes 2, or omit the fixing ring 12 and directly fix it to the non-magnetic rotating shaft 13 with adhesive, or At the bottom, there is a rotor α fixed with a slip ring 16 connecting the starting end 14 and the ending end 15 of the toroidal coil 11, and a fourth rotor α.
As shown in the figure, bearings 18 are inserted through the center of the upper and lower surfaces of the outer case 17 of the cylindrical yoke stator frame, and the inner upper surface 19 of the outer case 17 is fixed to the center of the upper and lower surfaces of the outer case 17 of the cylindrical yoke stator frame. Donut disk-shaped upper and lower permanent magnets 21 and 22 are fixed to the lower surface 20 with the same polar surfaces facing each other, and a brush 23 is further fixed to the inner lower surface 20 of the outer case 17 at a position in contact with the slip ring 16 of the rotor α. and external terminal 24
It consists of a stator β connected to.

なお磁気シールドコア１０は、円周方向に等分割した複
数のセクターセグメントを結束組合せて形成したもので
も良い。The magnetic shield core 10 may be formed by binding and combining a plurality of sector segments equally divided in the circumferential direction.

本発明の直流モーターＡは以上のように構成するから、
第５図（ａ）に示ずように、磁気シールドコア１０は磁
気シールド板を形成し、磁気シールドコア１０の少許上
方、下方に同極面（本例ではＮ極面）を対向して設けた
上、下永久磁石２’ｌ、２２によって作られる上方磁界
と下方磁界は中間で隔てられ、互いに干渉するこどはな
く、上方磁界では磁束φは上から下に向かい、下方磁界
では磁束φは下から上に向かっている。ここで、第５図
（ｂ）に示すように、外部端子２４と直流電源Ｅを接続
すると、電流Ｉはブラシ２３．スリップリング１６を経
て、１〜ロイダルコイル１１に矢印の向きに流れるから
、右側の上側コイル辺１１ａ、下側コイル辺１１ｂには
共に向う廁から手前側に向かう力が発生し、左側の上側
コイル辺１１ａ’、下側コイル辺１１ｂ′、には共に手
前側から向こう側に向かう力が発生する（尚、図中Ｏ■
は）〕の方向を示す）。Since the DC motor A of the present invention is configured as described above,
As shown in FIG. 5(a), the magnetic shield core 10 forms a magnetic shield plate, and the same polar planes (in this example, N pole planes) are provided facing each other slightly above and below the magnetic shield core 10. In addition, the upper magnetic field and the lower magnetic field created by the lower permanent magnets 2'l and 22 are separated in the middle and do not interfere with each other. In the upper magnetic field, the magnetic flux φ goes from top to bottom, and in the lower magnetic field, the magnetic flux φ is from bottom to top. Here, as shown in FIG. 5(b), when the external terminal 24 and the DC power source E are connected, the current I flows through the brush 23. Since the flow passes through the slip ring 16 and flows in the direction of the arrow from 1 to the loidal coil 11, a force is generated on the right side upper coil side 11a and the lower side coil side 11b from the opposite side to the front side, and the left side upper coil side 11a' and the lower coil side 11b', a force is generated from the near side toward the far side (in addition, O■ in the figure
) indicates the direction).

又第５図（Ｃ）に示すように磁束φは上、上円盤７，８
内から外部ケース１７の側面へ向かう時には、外部ケー
ス１７の側面との空隙が短い上、上円盤７，８の外周面
４を通り扱け、回転軸１３へ向かう時には内周面３を通
り抜１プるから、内周スロット５．外周スロット６内の
」イル端２５は磁束を横切ることはなく、コイル端２５
には力が発生せず、回転子αは上側コイル辺１１ａ、１
１ａ’　と下側］　イル辺１１ｂ、１１ｂ′に発生する
力によって、回転軸１３を外部ケース１７の軸受１８に
軸支して回転を開始する。Also, as shown in Fig. 5(C), the magnetic flux φ is
When going from the inside to the side surface of the outer case 17, the air gap with the side surface of the outer case 17 is short, and it can be handled by passing through the outer peripheral surface 4 of the upper disks 7, 8, and when heading toward the rotating shaft 13, it can be handled by passing through the inner peripheral surface 3. 1 pull, so inner slot 5. The coil end 25 in the outer peripheral slot 6 does not cross the magnetic flux, and the coil end 25
No force is generated in the rotor α, and the upper coil sides 11a, 1
1a' and the lower side] Due to the force generated on the side edges 11b and 11b', the rotating shaft 13 is supported by the bearing 18 of the outer case 17 and starts rotating.

この時、スリップリング１６も回転覆るが、スリップリ
ング１６はブラシ２３に接触しつつ回転するから、トロ
イダルコイル１１への通電はとだえることはなく、常に
一定方向の電流が上側コイル辺１１ａ、１１ａ’　、下
側コイル辺１１ｂ、１１ｂ’　に流れる。At this time, the slip ring 16 also rotates, but since the slip ring 16 rotates while contacting the brush 23, the energization to the toroidal coil 11 does not stop, and the current always flows in a fixed direction to the upper coil side 11a, 11a', and flows to the lower coil sides 11b and 11b'.

又、回転子αが回転を始めても、上側コイル辺１１ａ、
１１ａ’　、　下側コイル辺１１ｂ、１１ｂ’　は各々
、ドーナツ円盤形の上、下永久磁石２１．２２によって
作られる一定方向の磁界中に常に位置づるから、左手の
法則にいう電流。Moreover, even if the rotor α starts rotating, the upper coil side 11a,
11a' and the lower coil sides 11b and 11b' are always located in a magnetic field in a constant direction created by the donut disc-shaped upper and lower permanent magnets 21 and 22, respectively, so that the current according to the left-hand rule.

磁界の向きが一定となり、上側コイル辺１１ａ。The direction of the magnetic field is constant, and the upper coil side 11a.

１１ａ’、下側コイル辺１１ｂ、１１ｂ’　に発生する
力は方向が一定でかつ連続したも２のとなる。即ち回転
子αが連続的に回転する直流モーターとなる。11a' and the lower coil sides 11b, 11b' have a constant direction and a continuous force. In other words, it becomes a DC motor in which the rotor α rotates continuously.

次に本発明モーターの他の実施例につき第７図について
説明する。尚、図中前記実施例と同一部分には同一符号
を付した。Next, another embodiment of the motor of the present invention will be explained with reference to FIG. In the figure, the same parts as in the above embodiment are given the same reference numerals.

本発明の無整流直流モーターＢは、固定＠２６の上部と
下部に、円筒形継鉄回転子粋の外部ケース１７を旋回自
在に挾持する枠受２７を周設し、固定軸２６に固定した
１〜ロイダルコイル１１の始端１４と終端１５を各々、
枠受２７に設けた外部端子２４に接続してなる。The non-commutated DC motor B of the present invention has frame supports 27 surrounding the upper and lower parts of the fixed shaft 26 for pivotally holding the outer case 17 of a cylindrical yoke rotor, and is fixed to the fixed shaft 26. 1 to the starting end 14 and terminal end 15 of the loidal coil 11, respectively,
It is connected to the external terminal 24 provided on the frame receiver 27.

この外部端子２４を図示しない直流電源に接続づれば、
外部ケース１７がトロイダルコイル１１に発生する力の
向ぎと（、未逆方向に反力を受りて連続回転するモータ
ーとなる。If this external terminal 24 is connected to a DC power supply (not shown),
The external case 17 receives a reaction force in a direction opposite to the direction of the force generated in the toroidal coil 11, and becomes a motor that continuously rotates.

要するに本発明の無整流直流モーターＡの場合は、同極
面を対向させたドーナツ円盤形上。In short, the non-rectified DC motor A of the present invention has a donut disk shape with the same polar surfaces facing each other.

下永久磁石２１．２２を外部ケース１７である固定子枠
内部の上面と下面にそれぞれ固着した固定子βと、前記
上、下永久磁石２１．２２相互の中心を通り前記固定子
枠の軸心に沿って空転自在に貫通した回転軸１３の前記
固定子枠内中間位置に、磁気シールドコア１０の内周面
３と外周面４にそれぞれ対応して周方向等間隔に刻設し
たスロット５，６群相互に亘り放射状にコイル１１を連
続巻架して一体としたｉ〜ロイダルコイルを固定した回
転子αとからなり、前記１−ロイダルコイルはコイルＧ
ａ１４．１５を前記回転＠１３に固定したスリップリン
グ１６を介し外部端子２４に接続する。The stator β has lower permanent magnets 21 and 22 fixed to the upper and lower surfaces of the stator frame, which is the outer case 17, respectively, and the axis of the stator frame passes through the mutual centers of the upper and lower permanent magnets 21 and 22. Slots 5 are formed at equal intervals in the circumferential direction corresponding to the inner circumferential surface 3 and outer circumferential surface 4 of the magnetic shielding core 10, respectively, at intermediate positions within the stator frame of the rotary shaft 13, which passes through the rotary shaft 13 so as to freely rotate along the stator frame. The coils 11 are continuously wound in a radial manner over the six groups and are integrated into one.
a14.15 are connected to the external terminal 24 via the slip ring 16 fixed to the rotation @13.

他方、本発明の無整流直流モーターＢの場合は、同極面
を対向させたドーナツ円盤形上、下永久磁石２１．２２
を外部ケース１７である回転子枠内部の上面と下面にそ
れぞれ固着した回転子αと、前記上、下永久磁石２１．
２２相互の中心を通る軸心に治って固定軸２６に空転自
在に貫通取付（プＩ〔前記回転子枠内の前記固定軸２６
中間位置に、磁気シールドコア１０の内周面３と外周面
４にそれぞれ対応して周方向等間隔に刻設したスロット
５．６群相互に亘り放射状にコイル１１を連続巻架して
一体としたトロイダルコイルを固定した固定子βとから
なり゛、当該コイル端１４．１５を直接に外部端子２４
と接続する。On the other hand, in the case of the non-rectified DC motor B of the present invention, the donut disk-shaped upper and lower permanent magnets 21 and 22 have the same polar surfaces facing each other.
are fixed to the upper and lower surfaces of the rotor frame, which is the outer case 17, respectively, and the upper and lower permanent magnets 21.
22. The fixed shaft 26 in the rotor frame is attached to the fixed shaft 26 so that it can freely rotate around the axes that pass through the centers of each other.
The coils 11 are continuously wound radially through groups of slots 5 and 6, which are formed at equal intervals in the circumferential direction in correspondence with the inner circumferential surface 3 and outer circumferential surface 4 of the magnetic shielding core 10, respectively, at an intermediate position. and a stator β to which a toroidal coil is fixed, and the coil ends 14 and 15 are directly connected to external terminals
Connect with.

なお本発明の実施例では専ら縦型を図示説明して来たが
横型としても良く、また中間円盤を２つ以上としても良
い。In the embodiments of the present invention, only vertical types have been illustrated and described, but horizontal types may also be used, and two or more intermediate discs may be used.

当該本発明モーターＡ、Ｂに示すように、本発明法は、
同極面を対向させて配置した上下永久磁石２１．２２の
中心相互に亘り貫通した軸１３．２６の当該上、下永久
磁石２１．２２間の中間位置に磁性体円盤９を中に挾み
それぞれ絶縁膜Ｒを介して上下に透磁率の高い円盤７゜
８をザンドイツチ状に挾んで接着固定した磁気シールド
コア１０を固定して、前記上、下永久磁石２’１．２２
から生ずる上下の磁界相互を当該磁気シールドコア１０
で無干渉遮断し、当該磁気シールドコア１０のｆＩｌ射
方白方向続巻架したコイル１１に一定方向の直流電流を
流すことにより前記軸１３．２６を中心として磁界中３
．の前記コイル１１又は上、下永久磁石２１，２２のい
ずれか一方を連続回転する直流コイル無整流回転方法で
ある。As shown in the motors A and B of the present invention, the method of the present invention
A magnetic disk 9 is sandwiched between the upper and lower permanent magnets 21, 22 at an intermediate position of a shaft 13, 26 that passes through the center of the upper and lower permanent magnets 21, 22, which are arranged with the same polar surfaces facing each other. The upper and lower permanent magnets 2'1 and 22 are fixed with magnetic shielding cores 10 in which disks 7°8 of high magnetic permeability are sandwiched and adhesively fixed in a Zandermanch shape on the upper and lower sides through insulating films R, respectively.
The upper and lower magnetic fields generated from the magnetic shield core 10
3 in the magnetic field centered on the axis 13.26 by passing a DC current in a fixed direction through the coil 11 which is wound in the direction of the fIl radiation of the magnetic shield core 10.
．． This is a DC coil non-rectified rotation method in which either the coil 11 or one of the upper and lower permanent magnets 21 and 22 is continuously rotated.

しかして本発明法を適用した無整流直流モーターＡは従
来の直流モーターに不可欠であった整流子は不必要であ
り、ブラシは接触面が極めて滑らかなスリップリングと
接触してコイルに電流を流すからブラシの摩耗やノイズ
が少なく、又軸方向に薄型の小型軽量直流モーターとな
るし、直流モーターＢは、整流子もスリップリングも不
必要であるからさらに、摩耗部やノイズが少ないフライ
ホイル状のモーターとなるなど、時計やテープレコーダ
ーやカメラ等に一体組込んで駆動機構を簡易に作動し得
るし、その他速度制御装置と組合せて各種装置に適用可
能である等その応用範囲は広い。Therefore, the non-commutated DC motor A to which the method of the present invention is applied does not require a commutator, which is essential to conventional DC motors, and the brushes contact a slip ring with an extremely smooth contact surface to allow current to flow through the coil. This makes it a small, lightweight DC motor with less brush wear and noise, and is thinner in the axial direction. DC motor B does not require a commutator or slip ring, so it has a flywheel type with fewer wear parts and less noise. It has a wide range of applications, such as being integrated into clocks, tape recorders, cameras, etc., to easily operate the drive mechanism, and can be applied to various devices in combination with other speed control devices.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来の直流コイル回転方法の説明図、第２図
は本発明直流モーターＡの回転子における一部破断分解
斜面図、第３図は磁気シールドコアの平面図、第４図は
本発明直流モーターＡの固定子における一部破断分解斜
面図、゛第５図（ａ）（ｂ）（ｃ）はそれぞれ本発明直
流モーターへの動作説明図、第６図は同・概略的中央縦
断面図、第７図は本発明直流セーターＢの概略的中央縦
断面図である。Fig. 1 is an explanatory diagram of the conventional DC coil rotation method, Fig. 2 is a partially cutaway exploded slope view of the rotor of the DC motor A of the present invention, Fig. 3 is a plan view of the magnetic shield core, and Fig. 4 is A partially broken exploded slope view of the stator of the DC motor A of the present invention. Figures 5 (a), (b), and (c) are explanatory views of the operation of the DC motor of the present invention, respectively, and Figure 6 is a schematic center view of the same. A longitudinal sectional view, FIG. 7 is a schematic central longitudinal sectional view of the DC sweater B of the present invention.

Claims (1)

【特許請求の範囲】 １、　同極面を対向させて配置した上下永久磁石の中心
相互に亘り、貫通した軸の当該上下永久磁石間の中間位
置に磁気シールドコアを固定して前記上下永久磁石から
生ずる上−ドの磁界相互を当該磁気シールドコアで無干
渉遮断し、前記磁気シールドコアの放射方向に連続巻架
したコイルに一定り向の直流電流を流Ｊことにより前記
軸を中心として磁界中の前記コイル又は前記上下永久磁
石のいずれか一方を連続回転さぼる直流コイル無整流回
転方法 ２、　磁気シールドコアは、透磁率の高い円盤間にそれ
ぞれ絶縁膜を介して磁性体円盤をサンドインチ状に挾み
、接着固定してなる特許請求の範囲第１項記載の直流コ
イル無整流回転方法３、　同極面を対向させたドーナツ
円盤形上下永久磁石を磁性外部ケース内の上面と下面に
それぞれ固着する一方、前記上下永久磁石の中心を通り
前記外部ケースの軸心に沿って相互に空転自在に貫通し
た軸の前記外部ケース内中間位置に、磁気シールドコア
の内周面と外周面にそれぞれ対応して周方向等Ｅ隔に刻
設したスロット群相互に亘り放射状にコイルを連続巻架
して一体としたトロイダルコイルを固定してなる無整流
直流モーター ４、トロイダルコイルは、磁気シールドコアと一体回転
する時はコイル端を軸に固定したスリップリングを介し
外部端子に接続してなる特許請求の範囲第３項記載の無
整流直流モーター５、トロイダルコイルは、上下永久磁
石と一体的に外部ケースを回転する時は、コイル端を直
接に外部端子と接続してなる特許請求の範囲第３項記載
の無整流直流モーター[Claims] 1. The upper and lower permanent magnets are fixed by fixing a magnetic shield core at an intermediate position between the upper and lower permanent magnets on a penetrating shaft extending between the centers of the upper and lower permanent magnets arranged with the same polar surfaces facing each other. The upper and lower magnetic fields generated by the above-mentioned magnetic shield core are mutually blocked without interference, and a direct current is passed in a fixed direction through the coils wound continuously in the radial direction of the magnetic shield core, thereby creating a magnetic field centered on the axis. DC coil non-rectified rotation method 2, in which either the coil or the upper and lower permanent magnets are continuously rotated, the magnetic shield core is made by sandwiching magnetic disks with an insulating film between the disks with high magnetic permeability. A method 3 for rotating a DC coil without rectification according to claim 1, in which upper and lower permanent magnets in a donut disk shape with the same polar surfaces facing each other are mounted on the upper and lower surfaces of a magnetic outer case, respectively. At an intermediate position within the outer case of a shaft passing through the center of the upper and lower permanent magnets and mutually freely rotating along the axis of the outer case, the inner and outer circumferential surfaces of the magnetic shield core are respectively attached. A non-rectified DC motor 4 is constructed by fixing an integrated toroidal coil by continuously winding coils in a radial manner across slot groups formed at equal intervals E in the circumferential direction. When rotating integrally, the toroidal coil and the non-rectified DC motor 5 according to claim 3 are connected to an external terminal via a slip ring with the coil end fixed to the shaft. The non-rectified DC motor according to claim 3, in which the coil end is directly connected to an external terminal when the case is rotated.