JPS60226792A - Position detector of commutatorless dc motor - Google Patents

Position detector of commutatorless dc motor

Info

Publication number
JPS60226792A
JPS60226792A JP59084349A JP8434984A JPS60226792A JP S60226792 A JPS60226792 A JP S60226792A JP 59084349 A JP59084349 A JP 59084349A JP 8434984 A JP8434984 A JP 8434984A JP S60226792 A JPS60226792 A JP S60226792A
Authority
JP
Japan
Prior art keywords
coil
comparator
position detection
rotor
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP59084349A
Other languages
Japanese (ja)
Inventor
Koji Hamaoka
孝二 浜岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Refrigeration Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Refrigeration Co filed Critical Matsushita Refrigeration Co
Priority to JP59084349A priority Critical patent/JPS60226792A/en
Publication of JPS60226792A publication Critical patent/JPS60226792A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/14Electronic commutators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To facilitate maintenance by detecting the rotary position of a rotor with a position detecting magnet, a position detecting coil, a comparator and a logic circuit, thereby reducing signal lines from position detection sensors. CONSTITUTION:A position detecting coil 19 disposed oppositely to a position detecting magnet is composed of the first - the third coils 19-21 commonly connected at one ends, and grounded. The normal input of the first comparator 23 in a comparator circuit 22 is connected with the first coil 19, the inverting input is connected with the third coil 21, the normal input of the second comparator 24 is connected with the second coil 20, the inverted input is connected with the first coil 19, the normal input of the third comparator 25 is connected with the third coil 21, and the inverted input is connected with the second coil 20. The output of the comparator 22 is input to a logic circuit 26, and signal T1-T6 are output to turn ON or OFF a semiconductor switch.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は無整流子直流電動機に関し、特にその回転子の
位置検出回路に係わる。
DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a commutatorless DC motor, and particularly to a rotor position detection circuit thereof.

従来例の構成とその問題点 一般的な無整流子直流電動機の構造は第1図、第2図に
示すようになっている。図において1は永久磁石を有す
る回転子、2は前記回転子1の中心を通る回転軸、3は
前記回転軸2に取り付けられ前記回転子1の永久磁石と
同位置に極を配置した位置検出用磁石、4,5.6は前
記位置検出用磁石3に対向して取り付けられた位置検出
センサである。7は直流電源、8は前記直流電源の出力
を入力とする電子整流子回路、9は前記電子整流子回路
8の出力につながれている固定子巻線である。前記電子
整流子回路8は半導体スイッチ81〜S6によってイン
バータ構成され、前記回転子1の回転位置によって適当
な半導体スイッチ81〜S6をON又はOFFにするこ
と姉より、前記固定子巻線19を励磁させ、前記回転子
1を回転させる。
Conventional Structure and Problems The structure of a general non-commutator DC motor is shown in FIGS. 1 and 2. In the figure, 1 is a rotor having a permanent magnet, 2 is a rotating shaft passing through the center of the rotor 1, and 3 is a position detector attached to the rotating shaft 2 and having a pole located at the same position as the permanent magnet of the rotor 1. Magnets 4, 5.6 are position detection sensors mounted opposite to the position detection magnet 3. 7 is a DC power supply; 8 is an electronic commutator circuit which receives the output of the DC power supply; and 9 is a stator winding connected to the output of the electronic commutator circuit 8. The electronic commutator circuit 8 is configured as an inverter by semiconductor switches 81 to S6, and the stator winding 19 is excited by turning on or off the appropriate semiconductor switches 81 to S6 depending on the rotational position of the rotor 1. to rotate the rotor 1.

そして、従来の無整流子直流電動機の位置検出回路は第
3図に示すような構成であった。すなわち、10〜12
は前記位置検出センサ4〜6として使用されるホール素
子、13は前記ホール素子10〜12に電源を供給する
ホール素子電源、14〜16は前記ホール素子10〜1
2の信号を処理するホール素子信号処理回路、17は前
記ホール素子信号処理回路10〜12の出力により前記
半導体スイ・フチ81〜S6をON又はOFFさせる信
号T1′〜T6′を発生させる論理回路である。なお、
この信号T1′はスイッチS1に、T2′はスイッチS
2にといったふうに対応させである。このように位置検
出用センサとしてホール素子10〜12を使っていたた
めに信号線が多くなり誤配線の可能性があり、メンテナ
ンスもめんどうである。またモータを過酷な条件下(高
温等)で用いたい時には、半導体素子(ホール素子)を
使っているために信頼性が悪いという欠点を有していた
A conventional position detection circuit for a non-commutated DC motor has a configuration as shown in FIG. That is, 10 to 12
13 is a Hall element power source that supplies power to the Hall elements 10 to 12, and 14 to 16 are Hall elements 10 to 1 used as the position detection sensors 4 to 6.
17 is a logic circuit that generates signals T1' to T6' for turning on or off the semiconductor switch edges 81 to S6 based on the outputs of the Hall element signal processing circuits 10 to 12; It is. In addition,
This signal T1' is applied to switch S1, and T2' is applied to switch S.
This corresponds to 2. Since the Hall elements 10 to 12 are used as position detection sensors in this way, the number of signal lines increases, which may lead to incorrect wiring, and maintenance is also troublesome. Furthermore, when the motor is to be used under harsh conditions (such as high temperatures), it has the disadvantage of poor reliability due to the use of semiconductor elements (Hall elements).

発明の目的 そこで本発明は、位置検出センサからの信号線を減少さ
せ、誤配線を少なくしまたメンテナンスも容易にし、か
つモータを過酷な条件下で用いた場合にも高信頼性を得
られる無整流子直流電動機の位置検出回路を提供するこ
とを目的とする。
Purpose of the Invention Therefore, the present invention provides a method that reduces the number of signal lines from a position detection sensor, reduces incorrect wiring, facilitates maintenance, and provides high reliability even when the motor is used under harsh conditions. An object of the present invention is to provide a position detection circuit for a commutator DC motor.

発明の構成 この目的を達成するために本発明は回転子と同軸上にあ
りかつ回転子の永久磁石と極が同位置にある位置検出用
磁石と、前記位置検出用磁石と対向して配置されている
位置検出用コイルと、前記位置検出用コイルの出力を比
較する比較回路と、前記比較回路の出力を電子整流子回
路を動作させるのに必要な信号に変換する論理回路より
構成することにより前記回転子の回転位置を検出するよ
う処したものである。
Structure of the Invention In order to achieve this object, the present invention provides a position detecting magnet which is coaxial with the rotor and whose poles are in the same position as the permanent magnet of the rotor, and which is arranged opposite to the position detecting magnet. and a comparison circuit that compares the output of the position detection coil, and a logic circuit that converts the output of the comparison circuit into a signal necessary to operate the electronic commutator circuit. The rotational position of the rotor is detected.

実施例の説明 以下本発明の一実施例を第4図、第5図に従い説明する
DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 and 5.

図において18は位置検出用コイルで一端が共通に接祷
くれ接地された第1コイル19.第2コイル20.第3
コイル21により構成される。22は比較回路であり、
第1比較器23、第2比較器24、第3比較器25によ
り構成される。第1比較器23の正転入力は第1コイル
19に接続され、反転入力は第3コイル21に接続され
る。第2比較器24の正転入力は第2コイル2oに接続
され反転入力は第1コイル19に接続される。また第3
比較器26の正転入力は第3コイル21に接続され、反
転入力は第2コイル20に接続される。
In the figure, reference numeral 18 denotes a position detection coil, and one end of the first coil 19 is commonly grounded. Second coil 20. Third
It is composed of a coil 21. 22 is a comparison circuit;
It is composed of a first comparator 23, a second comparator 24, and a third comparator 25. The normal input of the first comparator 23 is connected to the first coil 19 , and the inverted input is connected to the third coil 21 . The normal input of the second comparator 24 is connected to the second coil 2o, and the inverted input is connected to the first coil 19. Also the third
The normal input of the comparator 26 is connected to the third coil 21 , and the inverted input is connected to the second coil 20 .

26は論理回路で、比較回路22の出力が入力され、半
導体スイッチ81〜S6をON又はOFFさせる信号T
1〜T6を発生させる。この信号T1FiスイッチS1
に、T2 はスイッチS2に以後それぞれ対応している
26 is a logic circuit into which the output of the comparison circuit 22 is input, and a signal T for turning on or off the semiconductor switches 81 to S6.
1 to T6 are generated. This signal T1Fi switch S1
, T2 corresponds to switch S2, respectively.

上記構成において動作を第6図に従って説明する0いま
回転子1が回転しているとする。この時第1 コイル1
9.第2コイル2’O、第3 コイ/l/21には各々
a −Cに示すような起電圧が発生する。
The operation of the above configuration will be explained with reference to FIG. 6. Let us now assume that the rotor 1 is rotating. At this time, the first coil 1
9. Electromotive voltages as shown at a-C are generated in the second coil 2'O and the third coil/l/21, respectively.

第1比較器23の正転入力にはaの信号が、また反転入
力にはCの信号が入力されるためその出力はdに示すよ
うになる。時間t。から時間t1 の間においては第1
比較器23の正転入力5反転入力であるため第1比較器
23の出力はL IIとなる。時間t1 から時間t2
の間においては第1比較器23の正転入力2反転入力で
あるため第1比転器23の出力はH”となる。時間t2
から時間t3の間においては第1比較器23の正転入力
5反転入力であるため第1比較器の出力はn L uと
なる。第2比較器24.第3比較器26についても同様
にして、各々e、fに示すような信号が得られる。比較
回路22の出力信号d、e、fを論理回路17に入力す
ることにより半導体スイッチ81〜S6に供給する信号
T1〜T6は各々q−1のように得られる。この信号q
−1によって半導体スイッチ81〜S6を動作させるこ
とによって回転子1は回転を続ける。
Since the signal a is input to the normal input of the first comparator 23, and the signal C is input to the inversion input, the output is as shown in d. Time t. to time t1, the first
Since the normal input and the inverted input of the comparator 23 are the same, the output of the first comparator 23 becomes L II. From time t1 to time t2
During the period t2, the output of the first ratio converter 23 becomes H'' because the first comparator 23 has a normal input and 2 inverted inputs.
During the period from t3 to time t3, the first comparator 23 has a normal rotation input and an inversion input, so the output of the first comparator becomes nL u. Second comparator 24. Similarly, for the third comparator 26, signals as shown in e and f are obtained, respectively. By inputting the output signals d, e, f of the comparison circuit 22 to the logic circuit 17, the signals T1 to T6 supplied to the semiconductor switches 81 to S6 are obtained as q-1, respectively. This signal q
-1, the rotor 1 continues to rotate by operating the semiconductor switches 81 to S6.

従って、従来のホール素子の場合8本必要であった信号
線が本実施例によって4本に削減することができだ。こ
れにより誤配線の可能性が少なくなり、かつメンテナン
スも容易になった。まだ位置検出用センサとしてコイル
を用いているので過酷な条件下においても高信頼性が得
られるという効果が得られる。
Therefore, the number of signal lines required for the conventional Hall element, which was eight, can be reduced to four according to this embodiment. This reduces the possibility of incorrect wiring and makes maintenance easier. Since a coil is still used as a position detection sensor, high reliability can be obtained even under harsh conditions.

発明の効果 以上の説明からも明らかなように本発明は回転子と同軸
上にありかつ回転子の永久磁石と極が同位置にある位置
検出用磁石と、前記位置・検出用磁石と対向して配置さ
れている位置検出用コイルと、前記位置検出用コイルの
出力を比較する比較回路と、前記比較回路の出力を電子
整流子回路を動作させるのに必要な信号に変換する論理
回路より構成することにより前記回転子の回転位置を検
出するようにしたものであるから、位置検出用信号の信
号線の数が削減でき、誤配線の可能性が少なくなりかつ
メンテナンスも容易になった。また位置検出用センサと
してコイルを用いているので過酷々条件下においても高
信頼性が得られるという効果が得られるものである。
Effects of the Invention As is clear from the above explanation, the present invention has a position detecting magnet that is coaxial with the rotor and whose poles are in the same position as the permanent magnets of the rotor, and a position detecting magnet that faces the position/detecting magnet. It consists of a position detection coil arranged at Since the rotational position of the rotor is thereby detected, the number of signal lines for position detection signals can be reduced, the possibility of incorrect wiring is reduced, and maintenance is also facilitated. Furthermore, since a coil is used as the position detection sensor, high reliability can be obtained even under severe conditions.

第2図は無整流子直流電動機の回路図、第3図は従来の
無整流子直流電動機の位置検出回路図、第4図は本発明
の一実施例を示す無整流子直流電動機の位置検出回路図
、第6図は第4図における各部の動作を示すタイミング
チャート図である。
Fig. 2 is a circuit diagram of a non-commutated DC motor, Fig. 3 is a position detection circuit diagram of a conventional non-commutated DC motor, and Fig. 4 is a position detection circuit diagram of a non-commutated DC motor showing an embodiment of the present invention. The circuit diagram and FIG. 6 are timing charts showing the operation of each part in FIG. 4.

1・・・・・・回転子、3・・・・・・位置検出用磁石
、7・・・・・・直流電源、8・・・・・・電子整流子
回路、9・・・・・・固定子巻線、18・・・・・・位
置検出用磁石、22・・・・・・比較回路、26・・・
・・・論理回路。
1... Rotor, 3... Position detection magnet, 7... DC power supply, 8... Electronic commutator circuit, 9...・Stator winding, 18... Position detection magnet, 22... Comparison circuit, 26...
...Logic circuit.

代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 第2図 第3図 第4図 第5図
Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

【特許請求の範囲】[Claims] n相の固定子巻線と、永久磁石を有する回転子と、直流
電源と、前記固定子巻線に電流を流す電子整流子回路と
よりなる無整流子モータを形成し、前記回転子と同軸上
にあり・・かつ前記永久磁石と極が同位置にある位置検
出用磁石と、前記位置検出用磁石と対向して配置されて
いる位置検出用コイルと、前記位置検出用コイルの出力
を比較する比較回路と、前記比較回路の出力を前記電子
整流子回路を動作させるのに必要な信号に変換する論理
回路より前記回転子の回転位置を検出する無整流子直流
電動機の位置検出回路。
A commutatorless motor is formed of an n-phase stator winding, a rotor having a permanent magnet, a DC power source, and an electronic commutator circuit for passing current through the stator winding, and is coaxial with the rotor. Compare the output of the position detection magnet located above and whose pole is in the same position as the permanent magnet, the position detection coil placed opposite to the position detection magnet, and the position detection coil. and a position detection circuit for a non-commutated DC motor that detects the rotational position of the rotor using a logic circuit that converts an output of the comparison circuit into a signal necessary for operating the electronic commutator circuit.
JP59084349A 1984-04-25 1984-04-25 Position detector of commutatorless dc motor Pending JPS60226792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59084349A JPS60226792A (en) 1984-04-25 1984-04-25 Position detector of commutatorless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59084349A JPS60226792A (en) 1984-04-25 1984-04-25 Position detector of commutatorless dc motor

Publications (1)

Publication Number Publication Date
JPS60226792A true JPS60226792A (en) 1985-11-12

Family

ID=13828036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59084349A Pending JPS60226792A (en) 1984-04-25 1984-04-25 Position detector of commutatorless dc motor

Country Status (1)

Country Link
JP (1) JPS60226792A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987006780A1 (en) * 1986-04-25 1987-11-05 Matsushita Electric Industrial Co., Ltd. Brushless dc motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987006780A1 (en) * 1986-04-25 1987-11-05 Matsushita Electric Industrial Co., Ltd. Brushless dc motor

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