JP2005348480A

JP2005348480A - Motor unit and motor device

Info

Publication number: JP2005348480A
Application number: JP2004163005A
Authority: JP
Inventors: Koji Harada; 浩二原田
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2004-06-01
Filing date: 2004-06-01
Publication date: 2005-12-15

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor unit that is long in motor service life, easy in maintenance, reduced in noise during operation, high in the reliability of the operation, furthermore, simple in constitution and reduced in the number of part items, allows motor rotation to be switched to forward rotation and reverse rotation according to the switching of the feed polarity of a DC power supply, and is suitable for the opening, closing and the like of an electric concealment door mirror. <P>SOLUTION: The motor unit comprises: DC power receiving terminals 6a, 6b in each of which the positive pole and the negative pole of a DC power supply 4 are mutually reversely switched and connected in association with a forward command and a reverse command in the rotative direction of a brushless DC motor 7; a reference potential terminal 6g connected to a reference potential pole; and a drive circuit 9 that drives the motor 7 so as to feed power thereto in the rotative direction discriminated form the change of a level of a detection terminal 9r in the rotative direction connected to either of terminals 6a, 6b. Backflow prevention diodes 10a, 10b that form current-carrying passages of the DC power supply are arranged between the terminals 6a, 6b and a power supply terminal 9p of the drive circuit 9, respectively, and a grounding terminal 9g of the drive circuit 9 is connected to the terminal 6g. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、車両の電動格納式ドアミラー等のＤＣモータで駆動される種々の機器のモータユニット及びこのユニットを用いたモータ装置に関するものである。 The present invention relates to a motor unit of various devices driven by a DC motor such as an electrically retractable door mirror of a vehicle, and a motor device using this unit.

従来、車両の電動格納式ドアミラーの開、閉（通常使用状態が開、格納状態が閉）にはブラシ付きＤＣモータが使用され、そのモータ装置は、前記ブラシ付きＤＣモータを設けたモータユニットと、このユニットに直流電源を給電するスイッチユニットとを組み合わせて、図７に示すように形成される。 Conventionally, a DC motor with a brush is used to open and close an electric retractable door mirror of a vehicle (the normal use state is open and the retracted state is closed), and the motor device includes a motor unit provided with the brush DC motor. This unit is combined with a switch unit that feeds a DC power supply to form a unit as shown in FIG.

同図において、１はブラシ付きＤＣモータ２が設けられたモータユニットであり、１対の直流受電端子１ａ、１ｂ及び基準電位端子１ｇの３端子を備え、ブラシ付きＤＣモータ２の１対の電源端子２ａ、２ｂを直流受電端子１ａ、１ｂに接続し、接地端子１ｇをいわゆるボディーアースによって車体に接続して形成されている。３はブラシ付きＤＣモータ２を例えば＋１２Ｖの車載の直流電源４に接続するスイッチユニットであり、ドアミラーの開閉操作によって連動して切り換わる２回路５ａ、５ｂのプッシュスイッチからなるスイッチ体５により形成されている。 In the figure, reference numeral 1 denotes a motor unit provided with a brushed DC motor 2, which includes a pair of DC power receiving terminals 1a and 1b and a reference potential terminal 1g, and a pair of power sources for the brushed DC motor 2. The terminals 2a and 2b are connected to the DC power receiving terminals 1a and 1b, and the ground terminal 1g is connected to the vehicle body by so-called body earth. Reference numeral 3 denotes a switch unit for connecting the brushed DC motor 2 to, for example, a + 12V in-vehicle DC power supply 4, which is formed by a switch body 5 composed of push switches of two circuits 5a and 5b that are switched in conjunction with opening and closing operations of the door mirror. ing.

このスイチ体５の２回路５ａ、５ｂは、モータユニット１の直流受電端子１ａ、１ｂそれぞれに接続された出力端子ｚａ、ｚｂと、直流電源４の正極の端子４ｐに接続された共通の正接点ｐｃと、回路別の負接点ｎａ、ｎｂとからなり、両負接点ｎａ、ｎｂがボディーアースされた直流電源４の基準電位側の負極の端子４ｎに接続されている。 The two circuits 5 a and 5 b of the switch body 5 have output terminals za and zb connected to the DC power receiving terminals 1 a and 1 b of the motor unit 1 and a common positive contact connected to the positive terminal 4 p of the DC power supply 4. pc and negative contacts na and nb for each circuit, and both negative contacts na and nb are connected to the negative terminal 4n on the reference potential side of the DC power supply 4 which is body-grounded.

そして、ドアミラーの開、閉を指令するドライバのプッシュ操作毎に２回路５ａ、５ｂの切り換え片ｓａ、ｓｂが連動して切り換わり、ドアミラーの開指令時、スイッチ体５は図８に示すように、出力端子ｚａが正接点ｐｃに接続されて出力端子ｚｂが負接点ｎｂに接続され、出力端子ｚａ、ｚｂが直流電源４の正極、負極それぞれに接続され、ドアミラーの閉指令時、スイッチ体５は図９に示すように、出力端子ｚａの接続接点が負接点ｎａに切り換わって出力端子ｚｂの接続接点が正接点ｐｃに切り換わり、出力端子ｚａ、ｚｂが直流電源４の負極、正極それぞれに接続される。 Then, the switching pieces sa and sb of the two circuits 5a and 5b are switched in conjunction with the push operation of the driver that instructs opening and closing of the door mirror, and when the door mirror opening command is issued, the switch body 5 is as shown in FIG. The output terminal za is connected to the positive contact pc, the output terminal zb is connected to the negative contact nb, the output terminals za and zb are connected to the positive electrode and the negative electrode of the DC power supply 4, respectively, and when the door mirror closing command is issued, the switch body 5 9, the connection contact of the output terminal za is switched to the negative contact na, the connection contact of the output terminal zb is switched to the positive contact pc, and the output terminals za and zb are respectively connected to the negative electrode and the positive electrode of the DC power supply 4. Connected to.

このスイッチ体５の切り換えにより、ドアミラーの開指令時は、直流電源４の正極がモータユニット１の直流受電端子１ａを介してブラシ付きＤＣモータ２の電源端子２ａに接続され、直流電源４の負極がモータユニット１の直流受電端子１ｂを介してブラシ付きＤＣモータ２の電源端子２ｂに接続され、電源端子２ａから電源端子２ｂの向きの駆動電流が流れてブラシ付きＤＣモータ２が正回転又は逆回転に通電駆動される。 By switching the switch body 5, when the door mirror is instructed to open, the positive electrode of the DC power supply 4 is connected to the power supply terminal 2a of the brushed DC motor 2 via the DC power receiving terminal 1a of the motor unit 1, and the negative electrode of the DC power supply 4 is used. Is connected to the power supply terminal 2b of the brushed DC motor 2 through the DC power receiving terminal 1b of the motor unit 1, and the drive current in the direction from the power supply terminal 2a to the power supply terminal 2b flows, so that the brushed DC motor 2 rotates forward or backward. Energized to rotate.

また、ドアミラーの閉指令時は、直流電源４の正極がモータユニット１の直流受電端子１ｂを介してブラシ付きＤＣモータ２の電源端子２ｂに接続され、直流電源４の負極がモータユニット１の直流受電端子１ａを介してブラシ付きＤＣモータ２の電源端子２ａに接続され、電源端子２ｂから電源端子２ａの向きの駆動電流が流れてブラシ付きＤＣモータ２が逆回転又は正回転に回転方向を切り換えて通電駆動される。 When the door mirror is closed, the positive electrode of the DC power supply 4 is connected to the power supply terminal 2 b of the brushed DC motor 2 via the DC power receiving terminal 1 b of the motor unit 1, and the negative electrode of the DC power supply 4 is connected to the DC of the motor unit 1. It is connected to the power supply terminal 2a of the brushed DC motor 2 via the power receiving terminal 1a, and a drive current in the direction from the power supply terminal 2b to the power supply terminal 2a flows, so that the brushed DC motor 2 switches the rotation direction to reverse or forward rotation. Is energized.

すなわち、車両の電動格納式ドアミラーの開閉に用いられる従来のモータ装置は、ブラシ付きＤＣモータ２のモータユニット１とスイッチユニット３とを組み合わせて形成され、ドアミラーの開、閉の指令に連動するスイッチユニット３のスイッチ体５の切り換えにより、ブラシ付きＤＣモータ２の給電極性を、ドアミラーの開と閉とで切り換えて反転し、ブラシ付きＤＣモータ２を正、逆回転してドアミラーを開、閉している（例えば、特許文献１参照。）。 That is, the conventional motor device used for opening and closing the electric retractable door mirror of the vehicle is formed by combining the motor unit 1 of the brushed DC motor 2 and the switch unit 3, and is a switch that interlocks with the door mirror opening and closing commands. By switching the switch body 5 of the unit 3, the feeding polarity of the brushed DC motor 2 is switched between opening and closing the door mirror and reversed, and the brushed DC motor 2 is rotated forward and backward to open and close the door mirror. (For example, refer to Patent Document 1).

特開平１１−１２３９８６号公報（段落［００１６］及び［００１７］、図１）JP 11-123986 A (paragraphs [0016] and [0017], FIG. 1)

前記従来のモータユニット１は、ブラシ付きモータ２を用いて形成されることから、モータ寿命が短く、定期的なメンテナンスが必要であり、また、動作中に比較的大きな騒音を発生する問題があり、さらに、動作の信頼性が低い問題もあり、その結果、このモータユニット１とスイッチユニット３とを組み合わせて形成された従来のこの種のモータ装置も同様の問題を有する。 Since the conventional motor unit 1 is formed using the motor 2 with a brush, there is a problem that the motor life is short, regular maintenance is required, and a relatively large noise is generated during operation. Further, there is a problem that the operation reliability is low. As a result, this type of conventional motor device formed by combining the motor unit 1 and the switch unit 3 also has the same problem.

そして、車両の電動格納式ドアミラーの開閉に用いられるモータユニットやモータ装置だけでなく、いわゆるＯＡ機器や家電機器等の種々の機器のモータユニットやモータ装置、具体的には、例えば電子レンジやオーブンレンジの庫内テーブル回転用のモータユニット、モータ装置においても、従来は、ブラシ付きモータのモータユニットを使用することから、前記と同様の問題が生じる。 And not only motor units and motor devices used to open and close electric retractable door mirrors of vehicles, but also motor units and motor devices of various devices such as so-called OA devices and home appliances, specifically, for example, microwave ovens and ovens Also in the motor unit and motor device for rotating the table in the range of the range, conventionally, since a motor unit of a motor with a brush is used, the same problem as described above occurs.

一方、この種のモータ装置において、例えば図の元のモータユニット１に代えて新たなモータユニットを用いて製造する場合等には、極力、図７の元のスイッチユニット３を、その結線も含めてそのまま用いることが、コストや作業性等の面からは好ましい。 On the other hand, in this type of motor device, for example, when a new motor unit is used instead of the original motor unit 1 shown in the figure, the original switch unit 3 shown in FIG. It is preferable to use it as it is in terms of cost, workability, and the like.

本発明は、モータ寿命が長く、メンテナンスが容易で動作中の騒音が小さく、動作の信頼性が高く、その上、部品数が少ない簡単な構成で、直流電源の給電極性の切り換えにしたがってモータ回転が正、逆に切り換わるモータユニットを提供することを課題とし、また、このモータユニットと従来のブラシ付きモータの給電極性切り換え用のスイッチユニットとを組み合わせた構成のモータ装置を提供することも課題とする。 The present invention has a long motor life, easy maintenance, low noise during operation, high operational reliability, and a simple configuration with a small number of components. It is an object to provide a motor unit that switches between forward and reverse, and also to provide a motor device having a configuration in which this motor unit and a switch unit for switching the power supply polarity of a conventional brushed motor are combined. And

上記した目的を達成するために、本発明のモータユニットは、ブラシレスＤＣモータと、このブラシレスＤＣモータの回転方向の正、逆の指令に連動して直流電源の正極、負極が相互に逆に切り換えて接続される１対の直流受電端子と、前記直流電源の負極、正極のいずれか基準電位極に接続された基準電位端子と、前記直流電源によって動作し、前記両直流受電端子のいずれか一方に接続された回転方向検出端子のレベル変化から前記ブラシレスＤＣモータの指令された回転方向を判別し、該判別に基き、前記ブラシレスＤＣモータを判別した回転方向に給電駆動する駆動回路とを備え、前記両直流受電端子と前記駆動回路の電源端子との間それぞれに前記直流電源の通電路を形成する逆流防止用ダイオードを設け、前記駆動回路の接地端子を前記基準電位端子に接続したことを特徴としている（請求項１）。 In order to achieve the above-described object, the motor unit of the present invention switches a brushless DC motor and the positive and negative electrodes of a DC power supply in reverse to each other in conjunction with forward and reverse commands of the rotation direction of the brushless DC motor. A pair of DC power receiving terminals connected to each other, a reference potential terminal connected to a reference potential electrode of either the negative electrode or the positive electrode of the DC power source, and one of the two DC power receiving terminals operated by the DC power source. A drive circuit for determining a commanded rotation direction of the brushless DC motor from a level change of a rotation direction detection terminal connected to the driving direction, and driving the power supply in the determined rotation direction based on the determination. A backflow prevention diode is provided between the both DC power receiving terminals and the power supply terminal of the drive circuit to form a current path for the DC power supply, and the ground terminal of the drive circuit The is characterized in that connected to the reference potential terminal (claim 1).

また、本発明のモータユニットは、基準電位極が直流電源の接地された負極であって、両直流受電端子と駆動回路の電源端子との間それぞれの逆流防止用ダイオードのカソードが前記電源端子に接続されたことを特徴とし（請求項２）、ブラシレスＤＣモータが車両の電動格納式ドアミラーの開閉モータを形成し、前記電動格納式ドアミラーの開、閉のいずれか一方、他方によって前記ブラシレスＤＣモータの回転方向の正、逆の指令が発生することを特徴としている（請求項３）。 In the motor unit of the present invention, the reference potential electrode is a negative electrode grounded by a DC power supply, and the cathodes of the respective backflow prevention diodes between the DC receiving terminals and the power supply terminal of the drive circuit are connected to the power supply terminal. The brushless DC motor forms an opening / closing motor of an electric retractable door mirror of a vehicle, and the brushless DC motor is opened or closed by the other or the other of the electric retractable door mirror. This is characterized in that a forward / reverse command in the rotation direction is generated (claim 3).

つぎに、本発明のモータ装置は、ブラシレスＤＣモータが設けられたモータユニットと、該モータユニットを直流電源に接続するスイッチユニットとによって形成されたモータ装置であって、前記スイッチユニットが、前記ブラシレスＤＣモータの回転方向の正、逆の指令に基いて２回路出力が相互に逆に前記直流電源の正極、負極のいずれか一方から他方、その逆に連動して切り換わるスイッチ体によって形成され、前記モータユニットが、前記スイッチ体の２回路出力端子それぞれに接続された１対の直流受電端子と、前記直流電源の負極、正極のいずれか基準電位極に接続さた基準電位端子と、前記直流電源によって動作し、前記前記両直流受電端子のいずれか一方に接続された回転方向検出端子のレベル変化から前記ブラシレスＤＣモータの指令された回転方向を判別し、該判別に基き、前記ブラシレスＤＣモータを判別した回転方向に給電駆動する駆動回路とを備え、かつ、前記両直流受電端子と前記駆動回路の電源端子との間それぞれに前記直流電源の通電路を形成する逆流防止用ダイオードを設け、前記駆動回路の接地端子を前記基準電位端子に接続して形成されたことを特徴としている（請求項４）。 Next, a motor device according to the present invention is a motor device formed by a motor unit provided with a brushless DC motor and a switch unit that connects the motor unit to a DC power source, and the switch unit includes the brushless DC motor. Two circuit outputs are formed by a switch body that switches in reverse with each other from one of the positive electrode and the negative electrode of the DC power supply based on the forward and reverse commands of the rotation direction of the DC motor, The motor unit includes a pair of DC power receiving terminals connected to each of the two circuit output terminals of the switch body, a reference potential terminal connected to a reference potential electrode of either a negative electrode or a positive electrode of the DC power source, and the DC The brushless DC is operated by a level change of a rotational direction detection terminal that is operated by a power source and is connected to one of the DC power receiving terminals. And a drive circuit for driving the brushless DC motor in the determined rotation direction based on the determined rotation direction, and the DC power receiving terminals and the power supply terminals of the drive circuits. A backflow prevention diode that forms a current path of the DC power source is provided between each of the drive circuit and the ground terminal of the drive circuit is connected to the reference potential terminal.

また、本発明のモータ装置は、スイッチ体が、ブラシレスＤＣモータの回転方向の正、逆の指令毎に操作されて切り換わる２回路プッシュスイッチからなることを特徴とし（請求項５）、基準電位極が直流電源の接地された負極であって、両直流受電端子と駆動回路の電源端子との間それぞれの逆流防止用ダイオードのカソードが前記電源端子に接続されていることも特徴とし（請求項６）、ブラシレスＤＣモータが車両の電動格納式ドアミラーの開閉モータを形成し、前記電動格納式ドアミラーの開、閉のいずれか一方、他方によって前記ブラシレスＤＣモータの回転方向の正、逆の指令が発生することも特徴としている（請求項７）。 Further, the motor device of the present invention is characterized in that the switch body comprises a two-circuit push switch that is operated and switched every time a forward or reverse command of the rotation direction of the brushless DC motor (Claim 5). The pole is a negative electrode of a DC power supply that is grounded, and the cathode of each backflow prevention diode is connected to the power supply terminal between both DC power receiving terminals and the power supply terminal of the drive circuit. 6) The brushless DC motor forms an opening / closing motor for the electric retractable door mirror of the vehicle, and either one of opening and closing of the electric retractable door mirror, and the other is used to command forward and reverse of the rotation direction of the brushless DC motor. It is also characterized by the fact that it occurs (claim 7).

まず、請求項１のモータユニットによれば、ブラシレスＤＣモータを設けて形成され、しかも、ブラシ付きＤＣモータを設けた従来ユニットと同様に、１対の直流受電端子と、基準電位端子との３端子構造である。 First, according to the motor unit of the first aspect, the brushless DC motor is provided, and, similarly to the conventional unit having the brushed DC motor, a pair of DC power receiving terminals and a reference potential terminal 3 Terminal structure.

そして、その駆動回路が例えば正電源で駆動される場合、いずれか一方の直流受電端子が直流電源の正極に接続されて回転方向検出端子が直流電源の負極に接続されると、その一方の直流受電端子と駆動回路の電源端子との間に設けられた逆流防止用ダイオードがオンし、このダイオードを介した直流電源で駆動回路が動作し、このとき、回転方向検出端子のレベル変化からの回転方向の判別に基きブラシレスＤＣモータを正回転または逆回転する。 When the drive circuit is driven by, for example, a positive power supply, when one of the DC power reception terminals is connected to the positive electrode of the DC power supply and the rotation direction detection terminal is connected to the negative electrode of the DC power supply, A backflow prevention diode provided between the power receiving terminal and the power supply terminal of the drive circuit is turned on, and the drive circuit is operated by a DC power source via this diode. At this time, the rotation from the level change of the rotation direction detection terminal Based on the direction discrimination, the brushless DC motor rotates forward or backward.

また、ブラシレスＤＣモータの回転方向の指令が反転し、前記の一方の直流受電端子が直流電源の負極に接続されて回転方向検出端子が直流電源の正極に接続されると、一方の直流受電端子と駆動回路の電源端子との間に設けられた逆流防止用ダイオードはオフするが、他方の直流受電端子と駆動回路の電源端子との間に設けられた逆流防止用ダイオードがオンし、このダイオードを介した直流電源で駆動回路が給電駆動され続け、回転方向検出端子のレベルからの回転方向の判別に基き、ブラシレスＤＣモータが逆回転または正回転に反転して駆動される。 Further, when the rotation direction command of the brushless DC motor is reversed, the one DC power receiving terminal is connected to the negative electrode of the DC power source, and the rotation direction detecting terminal is connected to the positive electrode of the DC power source, one DC power receiving terminal And the backflow prevention diode provided between the power supply terminal of the drive circuit is turned off, but the backflow prevention diode provided between the other DC power receiving terminal and the power supply terminal of the drive circuit is turned on. The drive circuit continues to be fed and driven by the DC power source via the brushless DC motor, and the brushless DC motor is driven in reverse rotation or reverse rotation based on the determination of the rotation direction from the level of the rotation direction detection terminal.

したがって、ブラシ付きＤＣモータを設けた従来ユニットと同様の３端子構造でブラシレスＤＣモータを備え、しかも、ユニットの両直流受電端子とユニット内の駆動回路の電源端子との間それぞれに逆流防止用ダイオードを設けた部品数が極力少なく、安価な構成により、前記の従来ユニットの場合と同様、モータ回転方向の指令にしたがって給電極性が反転する直流電源の給電に基き、ブラシレスＤＣモータを正回転、逆回転に自在に切り換えて回転駆動することができる。 Accordingly, a brushless DC motor is provided with a three-terminal structure similar to that of a conventional unit provided with a brushed DC motor, and a backflow prevention diode is provided between both DC receiving terminals of the unit and the power supply terminal of the drive circuit in the unit. As in the case of the conventional unit described above, the brushless DC motor is rotated in the forward and reverse directions based on the DC power supply in which the power supply polarity is reversed according to the motor rotation direction command. Rotation can be driven by switching freely to rotation.

そして、ブラシレスＤＣモータが、ブラシ付きＤＣモータに比して、モータ寿命が長く、メンテナンスが容易で動作中の騒音が小さく、動作の信頼性が高いことから、モータ寿命が長く、メンテナンスが容易で動作中の騒音が小さく、動作の信頼性も高く、その上、部品数が少ない簡単な構成で、直流電源の給電極性の切り換えにしたがってモータ回転が正、逆に切り換わる新規なモータユニットを提供することができる。 And since the brushless DC motor has a longer motor life, easier maintenance, lower noise during operation, and higher operational reliability than a brushed DC motor, the motor life is long and maintenance is easy. Provides a new motor unit with low noise during operation, high operational reliability, and simple configuration with a small number of parts, with motor rotation switching between forward and reverse according to the DC power supply polarity switching. can do.

また、請求項２のモータユニットによれば、直流電源が車両に搭載されたいわゆる正電源であって基準電位極が接地された負極になる場合に、ブラシレスＤＣモータの回転方向の指令に基き、直流電源の正極電位になった直流受電端子側の逆流防止用ダイオードがオンすることにより、前記の請求項１のモータユニットと同様の効果が得られる。 Further, according to the motor unit of claim 2, when the DC power source is a so-called positive power source mounted on the vehicle and the reference potential electrode is a grounded negative electrode, based on the rotation direction command of the brushless DC motor, The same effect as that of the motor unit of claim 1 can be obtained by turning on the backflow prevention diode on the side of the DC power receiving terminal that is at the positive electrode potential of the DC power supply.

さらに、請求項３のモータユニットによると、車両の電動格納式ドアミラーの開閉をブラシレスＤＣモータを用いて行うことができ、その際、前記の請求項１、２と同様、モータ寿命が長く、メンテナンスが容易で動作中の騒音が小さく、動作の信頼性も高く、その上、部品数が少ない簡単な構成で、直流電源の給電極性の切り換えにしたがってモータ回転が正、逆に切り換わり、安価にドアミラーの開閉機能が向上する。 Further, according to the motor unit of claim 3, the electric retractable door mirror of the vehicle can be opened and closed by using a brushless DC motor. Easy operation, low noise during operation, high reliability of operation, and simple configuration with a small number of parts, motor rotation can be switched between forward and reverse according to the switching of DC power supply polarity, and at low cost The door mirror opening / closing function is improved.

つぎに、請求項４のモータ装置によれば、ブラシレスＤＣモータを設けたモータユニットと、そのブラシレスＤＣモータの回転方向の正、逆の指令に基いて２回路出力が直流電源の正極、負極のいずれか一方から他方、その逆に連動して切り換わるスイッチ体のスイッチユニットとを組み合わせて形成され、この場合、モータユニットは、部品数が少ない簡単な構成で、直流電源の給電極性の切り換えにしたがってモータ回転を正、逆に切り換えることができ、スイッチユニットは、従来のブラシ付きＤＣモータの給電路切り換えのスイッチユニットをそのまま利用して形成することができ、ユニット間の配線等が従来のブラシ付きＤＣモータを使用した従来装置と変わらず、従来装置と全く同じようにして製造等することができ、コスト上昇や作業性の低下等が生じることもない。 Next, according to the motor device of claim 4, the two-circuit output is based on the positive and negative polarity of the DC power source based on the motor unit provided with the brushless DC motor and the forward and reverse commands of the rotation direction of the brushless DC motor. It is formed by combining the switch unit of the switch body that switches in conjunction with the other and vice versa. In this case, the motor unit has a simple configuration with a small number of parts and can be used to switch the power supply polarity of the DC power supply. Therefore, the motor rotation can be switched between forward and reverse, and the switch unit can be formed by using the switch unit for switching the power supply path of a conventional brushed DC motor as it is. It can be manufactured in the same way as the conventional device without changing from the conventional device using the attached DC motor. It does not occur, such as deterioration of and workability.

また、請求項５のモータ装置によれば、スイッチユニットを、２回路プッシュスイッチのスイッチ体を用いて具体的に形成することができ、請求項６のモータ装置によれば、基準電位極を接地された負極とすることにより、車両等に搭載する場合等に極めて効果的な構成に形成することができ、さらに、請求項７のモータ装置においては、車両の電動格納式ドアミラーの開閉に好適なブラシレスＤＣモータを用いたモータ装置を提供することができる。 According to the motor device of claim 5, the switch unit can be specifically formed using a switch body of a two-circuit push switch. According to the motor device of claim 6, the reference potential electrode is grounded. By using the negative electrode, it is possible to form a configuration that is extremely effective when mounted on a vehicle or the like. Further, in the motor device according to claim 7, the motor device is suitable for opening and closing an electric retractable door mirror of the vehicle. A motor device using a brushless DC motor can be provided.

つぎに、本発明をより詳細に説明するため、その実施形態について、図１〜図６にしたがって詳述する。 Next, in order to describe the present invention in more detail, an embodiment thereof will be described in detail with reference to FIGS.

（第１の実施形態）
まず、モータユニット単体の実施形態について、図１〜図３を参照して説明する。 (First embodiment)
First, an embodiment of a single motor unit will be described with reference to FIGS.

図１はモータユニット６の結線図、図２、図３は図１の通電駆動状態の一例、他の例の説明図である。 FIG. 1 is a connection diagram of the motor unit 6, and FIGS. 2 and 3 are explanatory diagrams of an example of the energization driving state of FIG. 1 and another example.

図１のモータユニット６は、図７の従来のブラシ付きＤＣモータ２のモータユニット１と同様、１対の直流受電端子６ａ、６ｂ及び基準電位端子６ｇの３端子を備え、例えば車両に搭載される場合、基準電位端子６ｇはボディーアースによって車体に接地される。 The motor unit 6 shown in FIG. 1 includes a pair of DC power receiving terminals 6a and 6b and a reference potential terminal 6g, as in the motor unit 1 of the conventional brushed DC motor 2 shown in FIG. The reference potential terminal 6g is grounded to the vehicle body by body earth.

そして、モータユニット６は従来のブラシ付きＤＣモータ２に代えて、周知の３相ｕ、ｖ、ｗのブラシレスＤＣモータ７を備える。このブラシレスＤＣモータ７は、その周囲に例えば１２０度の等間隔でロータ位置検出用の位置検出センサ８ｕ、８ｖ、８ｗが配設される。なお、各位置検出センサ８ｕ〜８ｗは、例えば、ホール素子構成である。 The motor unit 6 includes a known three-phase u, v, w brushless DC motor 7 instead of the conventional brushed DC motor 2. The brushless DC motor 7 is provided with position detection sensors 8u, 8v, and 8w for detecting the rotor position at equal intervals of 120 degrees, for example. In addition, each position detection sensor 8u-8w is a Hall element structure, for example.

また、モータユニット６はブラシレスＤＣモータ７の３相ＰＷＭ制御の駆動回路９を備える。この駆動回路９は、例えばローム株式会社の品番（型番）ＢＤ６９２１ＦＶの３相ブラシレスＤＣモータドライバＩＣ等の種々の汎用のブラシレスＤＣモータドライバＩＣによって形成され、電源端子９ｐ、接地端子９ｇ間に例えば＋１２Ｖの正電圧の直流電源が給電される間動作して内蔵のマイクロコンピュータが予め設定された制御プログラムを実行する。 The motor unit 6 includes a three-phase PWM control drive circuit 9 for the brushless DC motor 7. The drive circuit 9 is formed by various general-purpose brushless DC motor driver ICs such as a three-phase brushless DC motor driver IC of Rohm Co., Ltd. product number (model number) BD6921FV, for example, + 12V between the power supply terminal 9p and the ground terminal 9g. The built-in microcomputer executes a control program set in advance by operating while the positive voltage DC power supply is supplied.

ところで、１対の直流受電端子６ａ、６ｂは、ブラシレスＤＣモータ７の正回転（ｃｗ）／逆回転（ｃｃｗ）の回転方向の指令に連動して極性反転する直流電源を受電する。 By the way, the pair of DC power receiving terminals 6a and 6b receive a DC power source whose polarity is inverted in conjunction with a forward direction (cw) / reverse rotation (ccw) direction of the brushless DC motor 7.

そして、部品数が少なく極力簡単かつ安価な構成により、受電期間中に駆動回路９の電源端子９ｐ、接地端子９ｇ間に前記の＋１２Ｖの正電圧の直流電源を給電し続けるため、両直流受電端子６ａ、６ｂと駆動回路９の電源端子９ｐとの間それぞれに、この実施形態においては、電源端子９ｐにカソードを接続した逆流防止用ダイオード１０ａ、１０ｂを設ける。 Since the number of components is as small and simple as possible and the power supply terminal 9p of the drive circuit 9 and the ground terminal 9g are continuously supplied with the positive DC power source of + 12V during the power reception period, both DC power reception terminals In this embodiment, backflow prevention diodes 10a and 10b each having a cathode connected to the power supply terminal 9p are provided between 6a and 6b and the power supply terminal 9p of the drive circuit 9, respectively.

この場合、図２に示すように、直流受電端子６ａが車載電源等の直流電源１１の正極に接続され、直流受電端子６ａが同直流電源１１の負極に接続された状態になると、逆流防止用ダイオード１０ａがオンして直流電源１１の通電路を形成し、図中の矢印線に示すように、直流電源１１が駆動回路９の電源端子９ｐから接地端子９ｇに通流して駆動回路９が通電駆動され、直流電源１１の極性反転により、図３に示すように、直流受電端子６ａが直流電源１１の負極に接続され、直流受電端子６ａが同直流電源１１の正極に接続された状態になるときは、逆流防止用ダイオード１０ａはオフするが、逆流防止用ダイオード１０ｂがオンして直流電源１１の通電路を形成し、図中の矢印線に示すように、直流電源１１が駆動回路９の電源端子９ｐから接地端子９ｇに通流し続けて駆動回路９が通電駆動され続ける。 In this case, as shown in FIG. 2, when the DC power receiving terminal 6 a is connected to the positive electrode of the DC power source 11 such as the in-vehicle power source and the DC power receiving terminal 6 a is connected to the negative electrode of the DC power source 11, The diode 10a is turned on to form an energization path for the DC power supply 11, and the DC power supply 11 flows from the power supply terminal 9p of the drive circuit 9 to the ground terminal 9g as shown by the arrow line in the figure, and the drive circuit 9 is energized. When the DC power supply 11 is driven and the polarity of the DC power supply 11 is reversed, the DC power receiving terminal 6a is connected to the negative electrode of the DC power supply 11 and the DC power receiving terminal 6a is connected to the positive electrode of the DC power supply 11, as shown in FIG. At this time, the backflow prevention diode 10a is turned off, but the backflow prevention diode 10b is turned on to form an energization path for the DC power supply 11, and the DC power supply 11 is connected to the drive circuit 9 as shown by an arrow line in the figure. Power terminal 9 Driving circuit 9 continues to flow through to the ground terminal through 9g continues to be driven when.

つぎに、両直流受電端子６ａ、６ｂのいずれか一方、ここでは直流受電端子６ｂに、駆動回路９の正回転（ｃｗ）／逆回転（ｃｃｗ）の回転方向検出端子９ｒが接続され、駆動回路９は、制御待機状態での回転方向検出端子９ｒのしきい値レベルより大（以下ハイレベルという）から小（以下ローレベルという）への変化、その逆のローレベルからハイレベルへの変化の検出により、ブラシレスＤＣモータ７の回転方向を決定してモータ駆動制御を開始し、各位置検出センサ８ｕ〜８ｗから位置検出端子９ｓｕ、９ｓｖ、９ｓｗに入力されたロータ位置の検出信号等に基く周知の３相駆動制御により、決定した回転方向のＰＷＭ制御された３相ｕ、ｖ、ｗの駆動出力を３相出力端子９ｕ、９ｖ、９ｗからブラシレスＤＣモータ７に供給し、ブラシレスＤＣモータ７をその方向に回転する。 Next, the forward rotation (cw) / reverse rotation (ccw) rotation direction detection terminal 9r of the drive circuit 9 is connected to one of the DC reception terminals 6a and 6b, here the DC reception terminal 6b, and the drive circuit 9 is a change from the threshold level of the rotation direction detection terminal 9r in the control standby state to a value larger (hereinafter referred to as high level) to a smaller value (hereinafter referred to as low level), and vice versa. Based on the detection, the rotational direction of the brushless DC motor 7 is determined and motor drive control is started, and is well known based on the rotor position detection signals input to the position detection terminals 9su, 9sv and 9sw from the position detection sensors 8u to 8w. With the three-phase drive control, the PWM-controlled three-phase u, v, and w drive outputs in the determined rotational direction are supplied to the brushless DC motor 7 from the three-phase output terminals 9u, 9v, and 9w. Rotating the Siles DC motor 7 in that direction.

さらに、外部入力の信号により、駆動回路９のスタート／ストップの指令端子９ｓｔがスタートのレベルからストップのレベルに変化すると、このレベル変化の検出に基き、駆動回路９はモータ駆動制御を終了して前記の制御待機状態に戻り、直流電源１１の極性が反転し、回転方向検出端子９ｒのレベル変化が発生すると、ブラシレスＤＣモータ７を逆方向に回転し、以降、同様の動作をくり返す。 Further, when the start / stop command terminal 9st of the drive circuit 9 changes from the start level to the stop level by an external input signal, the drive circuit 9 ends the motor drive control based on the detection of this level change. Returning to the control standby state, when the polarity of the DC power supply 11 is reversed and the level change of the rotation direction detection terminal 9r occurs, the brushless DC motor 7 is rotated in the reverse direction, and the same operation is repeated thereafter.

このモータユニット６の場合、直流受電端子６ａ、６ｂ及び基準電位端子６ｇの３端子構成であり、図７のブラシ付きＤＣモータ２を備えた従来ユニット１と端子構成を変えることなく、従来のブラシ付きＤＣモータ２に代えてブラシレスＤＣモータ７を備えることができ、この場合、モータ寿命が長くなり、メンテナンスが容易になり、静音動作であり、その上、動作の信頼性も向上する。 The motor unit 6 has a three-terminal configuration of DC power receiving terminals 6a and 6b and a reference potential terminal 6g, and the conventional brush 1 without changing the terminal configuration from the conventional unit 1 including the brushed DC motor 2 of FIG. A brushless DC motor 7 can be provided instead of the attached DC motor 2. In this case, the motor life is extended, the maintenance is facilitated, the operation is silent, and the reliability of the operation is improved.

さらに、ブラシレスＤＣモータ７の駆動回路９に２個の逆流防止用ダイオード１０ａ、１０ｂを追加するだけでよく、追加する部品数が少なく、簡単かつ安価な構成で、直流受電端子６ａ、６ｂ間の直流電源の極性の反転にしたがってモータ回転を正、逆に切り換えることができ、簡素かつ安価な構成で従来ユニットより著しく優れた新規なモータユニット６を提供することができる。 Furthermore, it is only necessary to add two backflow prevention diodes 10a and 10b to the drive circuit 9 of the brushless DC motor 7. The number of parts to be added is small, and the configuration between the DC power receiving terminals 6a and 6b is simple and inexpensive. The motor rotation can be switched between forward and reverse according to the reversal of the polarity of the DC power supply, and a new motor unit 6 that is significantly superior to the conventional unit can be provided with a simple and inexpensive configuration.

ところで、前記実施形態においては、基準電位極を直流電源の負極としたが、基準電位極が直流電源の正極の場合、すなわち、駆動回路９が、その電源端子９ｐを接地端子９ｇに対して負電位の極性にする負電圧の直流電源で動作するときには、逆流防止用ダイオード１０ａ、１０ｂを、それぞれのアノードが駆動回路９の電源端子９ｐに接続する向きに設ければよい。 In the above embodiment, the reference potential electrode is the negative electrode of the DC power supply. However, when the reference potential electrode is the positive electrode of the DC power supply, that is, the drive circuit 9 has its power supply terminal 9p negative with respect to the ground terminal 9g. When operating with a negative voltage direct current power supply having the polarity of potential, the backflow prevention diodes 10a and 10b may be provided in the direction in which the respective anodes are connected to the power supply terminal 9p of the drive circuit 9.

（第２の実施形態）
つぎに、第１の実施形態のモータユニット６を用いて形成されたモータ装置の実施形態について、図４〜図６を参照して説明する。 (Second Embodiment)
Next, an embodiment of a motor device formed using the motor unit 6 of the first embodiment will be described with reference to FIGS.

図４はモータ装置１２の結線図であり、このモータ装置１２は、図１のモータユニット６と、図７の従来装置のスイッチユニット３によって形成されたスイッチユニット１３とからなり、例えば、図７のブラシ付きＤＣモータ２の従来装置に代えて、車両の電動格納式ドアミラーの開閉に用いられる。なお、図４において、図１、図７と同一符号は同一もしくは相当するものを示す。 4 is a connection diagram of the motor device 12. The motor device 12 includes the motor unit 6 of FIG. 1 and a switch unit 13 formed by the switch unit 3 of the conventional device of FIG. Instead of the conventional DC motor 2 with a brush, it is used to open and close an electric retractable door mirror of a vehicle. In FIG. 4, the same reference numerals as those in FIGS. 1 and 7 denote the same or corresponding components.

そして、スイッチユニット１３は、ドアミラーの開閉の指令が発生する毎にドライバのプッシュ操作で切り換わる２回路プッシュスイッチのスイッチ体５からなり、モータユニット６は、直流電源端子６ａ、６ｂがスイッチ体５の出力端子ｚａ、ｚｂそれぞれに接続され、基準電位端子６ｇがボディーアースの接地によって直流電源４の基準電位側の負極に接続され、これら３端子６ａ、６ｂ、６ｇの接続作業は、従来ユニット１の３端子１ａ、１ｂ、１ｇの接続作業となんら異なることがなく、ユニット６、１３間の配線接続等は、図７の従来装置のユニット１、３間の配線接続等と全く同じである。 The switch unit 13 includes a switch body 5 of a two-circuit push switch that is switched by a driver push operation every time a door mirror opening / closing command is generated. The motor unit 6 includes DC power supply terminals 6 a and 6 b that are connected to the switch body 5. The reference potential terminal 6g is connected to the negative electrode on the reference potential side of the DC power supply 4 by the grounding of the body ground, and the connection operation of these three terminals 6a, 6b, 6g is performed by the conventional unit 1. There is no difference from the connection work of the three terminals 1a, 1b, and 1g, and the wiring connection between the units 6 and 13 is exactly the same as the wiring connection between the units 1 and 3 of the conventional apparatus of FIG.

つぎに、スイッチユニット１３は、ドアミラーの開指令の操作時、図８のスイッチユニット３と同様、出力端子ｚａが正接点ｐｃに接続されて出力端子ｚｂが負接点ｎｂに接続され、出力端子ｚａ、ｚｂが直流電源４の正極、負極それぞれに接続され、また、ドアミラーの閉指令の操作時、図９のスイッチユニット３と同様、出力端子ｚａの接続接点が負接点ｎａに切り換わって出力端子ｚｂの接続接点が正接点ｐｃに切り換わり、出力端子ｚａ、ｚｂが直流電源４の負極、正極それぞれに接続される。 Next, when the door mirror opening command is operated, the switch unit 13 has the output terminal za connected to the positive contact pc, the output terminal zb connected to the negative contact nb, and the output terminal za, similarly to the switch unit 3 of FIG. , Zb are connected to the positive electrode and the negative electrode of the DC power supply 4, respectively, and when the door mirror closing command is operated, the connection contact of the output terminal za is switched to the negative contact na as in the switch unit 3 of FIG. The connection contact of zb is switched to the positive contact pc, and the output terminals za and zb are connected to the negative electrode and the positive electrode of the DC power supply 4, respectively.

そして、モータユニット６の両直流受電端子６ａ、６ｂがスイッチユニット１３の２回路の出力端子ｚａ、ｚｂそれぞれに接続されているため、ドアミラーの開指令の操作時は、逆流防止用ダイオード１０ａがオンして駆動回路９は図２の通電駆動状態になる。 Since both DC power receiving terminals 6a and 6b of the motor unit 6 are connected to the two output terminals za and zb of the switch unit 13, the backflow prevention diode 10a is turned on when the door mirror opening command is operated. Then, the drive circuit 9 enters the energization drive state shown in FIG.

このとき、駆動回路９は制御待機状態での回転方向検出端子９ｒの例えばしきい値レベルよりハイレベルからローレベルへの変化の検出により、ブラシレスＤＣモータ７の回転方向をドアミラーが開く方向に決定してモータ駆動制御を開始し、このモータ駆動制御によりドアミラーが規定位置まで開くと、ストッパによってその軸回転が機械的にロックされ、そのロックの検出信号が駆動回路９のスタート／ストップの指令端子９ｓｔに供給されて指令端子９ｓｔがスタートのレベルからストップのレベルに変化し、駆動回路９がモータ駆動制御を停止して制御待機状態になる。 At this time, the drive circuit 9 determines the rotation direction of the brushless DC motor 7 to be the direction in which the door mirror opens by detecting a change in the rotation direction detection terminal 9r in the control standby state from, for example, a threshold level to a high level to a low level. Then, the motor drive control is started, and when the door mirror is opened to the specified position by this motor drive control, the shaft rotation is mechanically locked by the stopper, and the detection signal of the lock is the start / stop command terminal of the drive circuit 9 9st and the command terminal 9st changes from the start level to the stop level, the drive circuit 9 stops the motor drive control and enters the control standby state.

また、ドアミラーの閉指令の操作時は、逆流防止用ダイオード１０ａはオフするが、逆流防止用ダイオード１０ｂがオンし、駆動回路９が図３の通電駆動状態になり、駆動回路９は通電駆動され続ける。 Further, when the door mirror closing command is operated, the backflow prevention diode 10a is turned off, but the backflow prevention diode 10b is turned on, the drive circuit 9 is in the energization drive state of FIG. 3, and the drive circuit 9 is energized. to continue.

このとき、駆動回路９は制御待機状態での回転方向検出端子９ｒの例えばしきい値レベルよりローベルからハイレベルへの変化の検出により、ブラシレスＤＣモータ７の回転方向をドアミラーが閉じる方向に決定してモータ駆動制御を開始し、ドアミラーが閉じると、ストッパによってその軸回転が機械的にロックされ、そのロックの検出信号が駆動回路９のスタート／ストップの指令端子９ｓｔに供給されて指令端子９ｓｔがスタートのレベルからストップのレベルに変化することにより、駆動回路９がモータ駆動制御を停止して制御待機状態になる。 At this time, the drive circuit 9 determines the rotation direction of the brushless DC motor 7 to be the direction in which the door mirror is closed by detecting the change in the rotation direction detection terminal 9r in the control standby state from, for example, a threshold level to a low level to a high level. When the motor drive control is started and the door mirror is closed, the shaft rotation is mechanically locked by the stopper, and the detection signal of the lock is supplied to the start / stop command terminal 9st of the drive circuit 9, and the command terminal 9st is By changing from the start level to the stop level, the drive circuit 9 stops the motor drive control and enters a control standby state.

したがって、この実施形態のモータ装置１２は、ブラシレスＤＣモータ７を設けたモータユニット６を備えることにより、ブラシ付きＤＣモータを設けた従来装置よりモータ寿命が長くなり、メンテナンスが容易になり、動作中の騒音が小さくなり、動作の信頼性が著しく向上する。 Therefore, the motor device 12 of this embodiment includes the motor unit 6 provided with the brushless DC motor 7, so that the motor life is longer than that of the conventional device provided with the brushed DC motor, maintenance is facilitated, and operation is in progress. The noise is reduced and the operation reliability is remarkably improved.

また、逆流防止用ダイオード１０ａ、１０ｂを設けた部品数が少ない簡単な構成で、ドアミラーの開閉操作に基くモータユニット６の直流受電端子６ａ、６ｂの受電極性の変化にしたがって、ブラシレスＤＣモータ７のモータ回転を正、逆に切り換えることができ、しかも、モータユニット６が図７の従来ユニット１と同じ３端子構造であり、図７の従来のブラシ付きＤＣモータの給電路切り換えのスイッチユニット３をそのまま利用してスイッチユニット１３を形成することにより、ユニット６、１３間の配線等を従来装置１と全く同じにして、コスト上昇や作業性の低下等なくモータ装置１２を製造等することができる。 Further, the brushless DC motor 7 has a simple configuration with a small number of parts provided with the backflow prevention diodes 10a and 10b, and changes in the receiving power of the DC power receiving terminals 6a and 6b of the motor unit 6 based on the door mirror opening / closing operation. The motor unit 6 has the same three-terminal structure as the conventional unit 1 shown in FIG. 7, and the switch unit 3 for switching the power supply path of the conventional brushed DC motor shown in FIG. By forming the switch unit 13 as it is, the wiring between the units 6 and 13 can be made exactly the same as that of the conventional device 1, and the motor device 12 can be manufactured without an increase in cost and a decrease in workability. it can.

なお、スイッチユニット１３は２回路プッシュスイッチのスイッチ体５を用いて具体的に形成され、基準電位極を接地された負極としたため、モータ装置１２は車両の電動格納式ドアミラーの開閉に極めて好適である。 Since the switch unit 13 is specifically formed by using the switch body 5 of a two-circuit push switch, and the reference potential electrode is a grounded negative electrode, the motor device 12 is extremely suitable for opening and closing the electric retractable door mirror of the vehicle. is there.

そして、第１の実施形態と同様、基準電位極が直流電源４の正極であってもよく、この場合、逆流防止用ダイオード１０ａ、１０ｂを、それぞれのアノードが駆動回路９の電源端子９ｐに接続する向きに設ければよい。 As in the first embodiment, the reference potential electrode may be the positive electrode of the DC power supply 4. In this case, the backflow prevention diodes 10 a and 10 b are connected to the power supply terminals 9 p of the drive circuit 9. What is necessary is just to provide in the direction to do.

ところで、スイッチユニット３、１３を使用しないのであれば、ブラシレスＤＣモータ７を設けたモータ装置は、図５に示すように形成することもできる。 By the way, if the switch units 3 and 13 are not used, the motor device provided with the brushless DC motor 7 can also be formed as shown in FIG.

この図５のモータ装置１２＊は、図１、図４のモータユニット６からダイオード１０ａ、１０ｂを省き、駆動回路９の電源端子９ｐ、回転方向検出端子９ｒを直流受電端子６ａ、６ｂそれぞれに接続した構成のモータユニット６＊と、直流電源４の正極の端子４ｐと直流受電端子との間に設けられた逆流防止用ダイオード１４と、直流電源４の正極の端子４ｐと直流受電端子６ｂとの間に設けられた開閉操作スイッチ１５と、直流受電端子６ｂと直流電源４の負極の端子４ｎとの間に設けられた誤動作防止用のプルダウン抵抗１６とによって形成される。 The motor device 12 * in FIG. 5 omits the diodes 10a and 10b from the motor unit 6 in FIGS. 1 and 4, and connects the power supply terminal 9p and the rotation direction detection terminal 9r of the drive circuit 9 to the DC power receiving terminals 6a and 6b, respectively. The motor unit 6 * having the above-described configuration, the backflow prevention diode 14 provided between the positive terminal 4p and the direct current receiving terminal of the direct current power supply 4, and the positive terminal 4p and the direct current receiving terminal 6b of the direct current power supply 4 An opening / closing operation switch 15 provided therebetween, and a pull-down resistor 16 for preventing malfunctioning provided between the DC power receiving terminal 6 b and the negative terminal 4 n of the DC power supply 4 are formed.

このモータ装置１２＊は、駆動回路９の電源端子９ａと接地端子９ｇとの間に逆流防止用ダイオード１４を介した直流電源４が常時給電されて駆動回路９が動作し、電動格納式ミラーの開閉等に基く開閉操作スイッチ１５の開、閉により、直流受電端子６ｂに接続された駆動回路９の回転方向検出端子９ｒのレベル変化にしたがって駆動回路９がブラシレスＤＣモータ７を正、逆に回転する。 In the motor device 12 *, the DC power source 4 via the backflow prevention diode 14 is constantly supplied between the power supply terminal 9a and the ground terminal 9g of the drive circuit 9, the drive circuit 9 operates, and the electric retractable mirror By opening / closing the opening / closing operation switch 15 based on opening / closing or the like, the drive circuit 9 rotates the brushless DC motor 7 forward and backward according to the level change of the rotation direction detection terminal 9r of the drive circuit 9 connected to the DC power receiving terminal 6b. To do.

この場合、モータ装置１２＊は、外部回路（周辺付加回路）として、逆流防止用ダイオード１４、プルダウン抵抗１６及び開閉操作スイッチ１５が必要になるものの、モータ装置１２の逆流防止用ダイオ−ド１０ａ、１０ｂを省いて形成することができる。 In this case, although the motor device 12 * requires the backflow prevention diode 14, the pull-down resistor 16 and the open / close operation switch 15 as an external circuit (peripheral additional circuit), the backflow prevention diode 10a of the motor device 12 It can be formed by omitting 10b.

つぎに、前記のモータユニット６＊とスイッチユニット１３とを組み合わせ、ブラシレスＤＣモータを設けたモータ装置を、図６に示すように形成することも考えられる。 Next, it is conceivable to form a motor device provided with a brushless DC motor by combining the motor unit 6 * and the switch unit 13 as shown in FIG.

この図６のモータ装置１２＊´は、ドアミラーの開、閉の指令に連動して極性が反転するスイッチユニット１３の出力端子ｚａ、ｚｂの直流をダイオードブリッジの整流回路１７によって全波整流し、定極性の直流電源を再生し、この直流電源をモータユニット６＊の直流受電端子６ａと基準電位端子６ｇとの間に供給して駆動回路９を常時通電駆動し、また、例えば出力端子ｚａに直流受電端子６ｂを接続して駆動回路９の回転方向検出端子９ｒをドアミラーの開、閉の指令に連動してレベル変化させる。なお、駆動回路９を極性反転時のサージから保護するため、端子６ａ、６ｇ間にツェナダイオード１８とコンデンサ１９との並列回路も設けられる。 The motor device 12 * ′ of FIG. 6 performs full-wave rectification on the direct current of the output terminals za and zb of the switch unit 13 whose polarity is reversed in conjunction with a door mirror open / close command by a diode bridge rectifier circuit 17, A DC power supply having a constant polarity is regenerated, this DC power supply is supplied between the DC power receiving terminal 6a and the reference potential terminal 6g of the motor unit 6 *, and the drive circuit 9 is always energized and driven, for example, to the output terminal za. The DC power receiving terminal 6b is connected to change the level of the rotational direction detection terminal 9r of the drive circuit 9 in conjunction with a door mirror opening / closing command. In order to protect the drive circuit 9 from a surge during polarity reversal, a parallel circuit of a Zener diode 18 and a capacitor 19 is also provided between the terminals 6a and 6g.

このモータ装置１２＊´の場合、ダイオードブリッジの整流回路１７、サージ保護用のツェナダイオード１８とコンデンサ１９の並列回路をさらに設ける必要があるが、従来のブラシ付きＤＣモータの給電路切り換えのスイッチユニット３をそのまま利用したスイッチユニット１３を使用して形成することができる。 In the case of this motor device 12 * ′, it is necessary to further provide a diode bridge rectifier circuit 17, a parallel circuit of a surge protection Zener diode 18 and a capacitor 19, but a switch unit for switching the power supply path of a conventional brushed DC motor. 3 can be formed by using a switch unit 13 that uses 3 as it is.

そして、本発明は上記した両実施形態に限定されるものではなく、その趣旨を逸脱しない限りにおいて上述したもの以外に種々の変更を行うことが可能であり、例えば、モータユニット６の駆動回路９が種々の構成、動作のブラシレスＤＣモータドライバＩＣで形成されていてもよく、ブラシレスＤＣモータが３相でない場合にも適用することができる。 The present invention is not limited to both of the above-described embodiments, and various modifications other than those described above can be made without departing from the spirit thereof. For example, the drive circuit 9 of the motor unit 6 can be made. May be formed of brushless DC motor driver ICs having various configurations and operations, and can also be applied when the brushless DC motor is not three-phase.

そして、車両の電動格納式ドアミラーの開閉のモータユニット、モータ装置だけでなく、ＯＡ機器や家電機器等、例えば電子レンジやオーブンレンジの庫内テーブル回転用のモータユニット、モータ装置にも、本発明を同様に適用することができる。 The present invention is applicable not only to a motor unit and a motor device for opening and closing an electric retractable door mirror of a vehicle, but also to a motor unit and a motor device for rotating a table inside a microwave oven or a microwave oven, such as OA equipment and home appliances. Can be applied as well.

この発明の第１の実施形態の結線図である。It is a connection diagram of a 1st embodiment of this invention. 図１の通電駆動状態の一例の説明図である。It is explanatory drawing of an example of the energization drive state of FIG. 図１の通電駆動状態の他の例の説明図である。It is explanatory drawing of the other example of the energization drive state of FIG. この発明の第２の実施形態の結線図である。It is a connection diagram of a 2nd embodiment of this invention. モータ装置の他の例の結線図である。It is a connection diagram of the other example of a motor apparatus. モータ装置のさらに他の例の結線図である。FIG. 10 is a connection diagram of still another example of the motor device. 従来装置の結線図である。It is a connection diagram of a conventional device. 図７の閉指令時のスイッチユニットの状態説明図である。FIG. 8 is an explanatory diagram of the state of the switch unit at the time of a closing command in FIG. 7. 図７の開指令時のスイッチユニットの状態説明図である。FIG. 8 is an explanatory diagram of the state of the switch unit at the time of an opening command in FIG. 7.

Explanation of symbols

４、１１直流電源
５スイッチ体
６モータユニット
６a、６ｂ直流受電端子
６ｇ基準電位端子
７ブラシレスＤＣモータ
９駆動回路
９ｐ電源端子
９ｒ回転方向検出端子
９ｇ接地端子
１０ａ、１０ｂ逆流防止用ダイオード
１２モータ装置
１３スイッチユニット
ｚａ、ｚｂ２回路の出力端子 4, 11 DC power supply 5 Switch body 6 Motor unit 6a, 6b DC power receiving terminal 6g Reference potential terminal 7 Brushless DC motor 9 Drive circuit 9p Power supply terminal 9r Rotation direction detection terminal 9g Grounding terminal 10a, 10b Backflow prevention diode 12 Motor device 13 Switch unit za, zb Two circuit output terminals

Claims

A brushless DC motor;
A pair of DC power receiving terminals to which the positive and negative electrodes of the DC power supply are switched in reverse to each other in conjunction with forward and reverse commands of the rotation direction of the brushless DC motor;
A reference potential terminal connected to a reference potential electrode of either the negative electrode or the positive electrode of the DC power supply;
The brushless DC motor is instructed from the level change of the rotation direction detection terminal connected to one of the DC power receiving terminals and operated by the DC power source, and the brushless DC motor is determined based on the determination. A drive circuit that feeds and drives the motor in the determined rotational direction,
A backflow prevention diode is provided between each of the DC power receiving terminals and the power supply terminal of the drive circuit to form a current path for the DC power supply, and a ground terminal of the drive circuit is connected to the reference potential terminal. Motor unit.

The reference potential electrode is a grounded negative electrode of a DC power supply, and the cathodes of the respective backflow prevention diodes are connected to the power supply terminal between both DC power receiving terminals and the power supply terminal of the drive circuit. Item 2. The motor unit according to Item 1.

A brushless DC motor forms an opening / closing motor for an electric retractable door mirror of a vehicle, and a forward / reverse command for the rotational direction of the brushless DC motor is generated by either opening or closing the electric retractable door mirror. The motor unit according to claim 1 or 2.

A motor device formed by a motor unit provided with a brushless DC motor and a switch unit for connecting the motor unit to a DC power source,
The switch unit is
Based on forward and reverse commands of the brushless DC motor rotation direction, the two-circuit outputs are formed by a switch body that switches in reverse from one of the positive and negative electrodes of the DC power supply to the other and vice versa. And
The motor unit is
A pair of DC power receiving terminals connected to each of the two circuit output terminals of the switch body;
A reference potential terminal connected to a reference potential electrode of either the negative electrode or the positive electrode of the DC power supply;
The brushless DC motor commanded rotation direction is determined from the level change of the rotation direction detection terminal connected to one of the DC power receiving terminals, and the brushless DC motor is commanded based on the determination. A drive circuit for feeding and driving the DC motor in the determined rotational direction,
In addition, a backflow prevention diode is provided between each of the DC power receiving terminals and the power supply terminal of the drive circuit to form a current path for the DC power supply, and the ground terminal of the drive circuit is connected to the reference potential terminal. A motor device characterized by being formed.

5. The motor device according to claim 4, wherein the switch body comprises a two-circuit push switch that is operated and switched every time a forward or reverse command in the rotation direction of the brushless DC motor.

A reference potential electrode is a grounded negative electrode of a DC power supply, and a cathode of each backflow prevention diode is connected to the power supply terminal between both DC power receiving terminals and a power supply terminal of a drive circuit. The motor device according to claim 4 or 5.

A brushless DC motor forms an opening / closing motor for an electric retractable door mirror of a vehicle, and a forward / reverse command for the rotational direction of the brushless DC motor is generated by either opening or closing the electric retractable door mirror. The motor device according to any one of claims 4 to 6.