WO2000038186A1 - Disk unit - Google Patents

Disk unit Download PDF

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Publication number
WO2000038186A1
WO2000038186A1 PCT/JP1999/007119 JP9907119W WO0038186A1 WO 2000038186 A1 WO2000038186 A1 WO 2000038186A1 JP 9907119 W JP9907119 W JP 9907119W WO 0038186 A1 WO0038186 A1 WO 0038186A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation speed
spindle motor
speed
signal
speed detection
Prior art date
Application number
PCT/JP1999/007119
Other languages
French (fr)
Japanese (ja)
Inventor
Masahiko Shimizu
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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 Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to KR1020007008980A priority Critical patent/KR20010024928A/en
Publication of WO2000038186A1 publication Critical patent/WO2000038186A1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/28—Speed controlling, regulating, or indicating
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2545—CDs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
    • G11B2220/2575—DVD-RAMs

Definitions

  • the present invention relates to a disk device that controls the rotation speed of a rotation motor that rotates a disk.
  • the disk device receives a command from an external device such as a host computer, searches for a target position, reads the target data from data recorded on the disk, and transfers the data to the external device.
  • Compact Disk) and CD-ROM (CD-Read Only Memory) are assumed to be played at 1x speed of CLV (Constant Linear Velocity).
  • a constant speed high-speed reading such as 4x speed or 8x speed of CLV is performed.However, to increase the search speed by a constant speed high speed reading by CLV such as 4x speed or 8x speed, the load on the spindle motor is required. Becomes so large that an expensive and large spindle motor is required. Therefore, in recent years, devices that play back discs recorded in C.LV with CAV (Constant Angular Velocity), and CLV playback but with a very wide raw range for high-speed search and This has realized a wide-range CLV system that has been developed. Both types greatly reduce the load on the spindle motor, A high-speed search is realized by using a small and small motor.
  • FIG. 3 is a diagram showing a configuration of a conventional compact disk device.
  • reference numeral 100 denotes a disk supported by a clamper 100, which is rotated by a spindle motor 102 which is feedback-controlled by a signal processing circuit 110 via a spindle motor control circuit 103.
  • Reference numeral 105 denotes an optical pickup for reading a signal from the disk 100, which focuses and is controlled by a focus coil controlled by a tracking control circuit 104 and a tracking coil 106. The tracking is adjusted, and the disk is moved in the radial direction of the disk by the traverse motor 108 controlled by the traverse motor control circuit 109.
  • Reference numeral 107 denotes an RF amplifier that extracts a focus error signal, a tracking error signal, and a KF signal from the output of the optical pickup 105
  • 110 denotes a traverse motor control circuit. This is a signal processing circuit that controls the 109, focus tracking control circuit 104, and spindle motor control circuit 103.
  • Reference numeral 111 denotes a system controller that switches between CLVZCAV and is connected to the signal processing circuit 110 and the signal processing circuit interface circuit 112.
  • the signal-processing circuit 110 generates control signals for focus servo and tracking servo based on the signal input from the KF amplifier 107, outputs the signals to the focus / tracking control circuit 104, and outputs RF signals.
  • PLL phase-locked loop
  • the generated signal frequency of the PLL clock is based on 4.3 218 MHz at CLV, its variation range is ⁇ several tens of percent, and the rotational speed of spindle motor 102 is always
  • the optical pickup 105 changes sequentially according to the track position where the optical pickup 105 is reading, so that the frequency of the PLL clock becomes constant, that is, the disk 100 rotates at CLV.
  • the signal processing circuit 110 calculates the rotational speed detection signal 200 from the spindle motor control circuit 103, and the optical pick-up] moves from the peripheral portion of the disk 100 toward the center.
  • the spindle motor control signal 20.sub.3 is output to the spindle motor control circuit 103 so that the rotation speed increases one after another.
  • the signal processing circuit 110 calculates the rotational speed detection signal 200 from the spindle motor control circuit] 03, and outputs the spindle motor control signal so that the disk 100 rotates with the CAV. Output 201 to the spindle motor control circuit 103.
  • the rotation speed detection signal 200 is always output as long as the spindle motor] 02 is rotating even if the RF signal is lost, so it is used to check the rotation state of the spindle motor 102. be able to. That is, in the conventional compact disk device, the focus or tracking deviates, the focus servo, or the tracking servo is monitored by the signal processing circuit 110 monitoring the rotation speed detection signal 200. Even when one button did not operate normally, the rotation state of the spindle motor 102 could be checked, preventing the spindle motor 102 from abnormally rotating or stopping.
  • a spindle motor is provided with one ball sensor along the inner circumference of the stator and uses a brushless motor that generates a pulse output of 2 ⁇ Lo ZH i per revolution, Rotation speed of bindle motor
  • the width of one panorama of the rotation speed detection signal which is the output of the spindle motor control circuit that detects the rotation speed, is 4.3 rasec for high-speed rotation, for example, at 700 rpm, and 1 for low-speed rotation, for example, at 20 ° rpm. 50 msec. Therefore, if the rotation speed of the spindle motor is detected using the IHJ rotation speed detection signal, the width of the ⁇ pulse of the rotation speed detection signal will be greater at low speed rotation than at high speed rotation. There was a question that a longer time was required to detect the rotation speed than at the time of high speed.
  • the present invention has been made to solve the above-mentioned conventional problems, and a disk device capable of detecting the rotation speed of a spindle motor in a short time even when the spindle motor rotates at a low speed.
  • the goal is to provide Disclosure of the invention
  • a disk device includes: a rotation speed detection unit that detects a rotation speed of a rotation motor; and a rotation speed detection interval switching unit that switches a rotation speed detection interval of a rotation speed detection unit.
  • the switching is performed so that the rotation speed detection interval of the rotation speed detection means is shortened.
  • FIG. 1 is a block diagram of a preferred compact disk device according to the present invention
  • FIG. 2 is a diagram for explaining an operation of switching a rotation speed detection interval of a spindle motor control circuit in the compact disk device.
  • FIG. 3 is a signal waveform diagram
  • FIG. 3 is a block diagram of a conventional compact disk device.
  • FIG. 3 is a block diagram of a preferred compact disk device according to the present invention.
  • This compact disk device is provided with a rotational speed for switching the rotational speed detection interval of the spindle motor control circuit 103 inside the spindle motor control circuit 103 of the conventional compact disk device shown in FIG.
  • a detection interval switching circuit 113 is provided.
  • FIG. 2 is a signal waveform diagram for explaining an operation of switching a rotation speed detection interval of a spindle motor control circuit in a preferred compact disk device according to the present invention.
  • the signal processing circuit 110 As shown in the figure, if the rotation speed of the spindle motor 102 is lower than the predetermined speed, the spindle motor control circuit 103 of the spindle motor control circuit 103 will select [El rotation speed detection interval so as to shorten the interval.
  • a rotation speed detection interval switching signal 202 is output to the rotation speed detection interval switching circuit 1 1 3 inside 3.
  • the spindle motor control circuit 103 detects the rotation speed of the spindle motor 1 If the speed is higher than the specified speed, only the output of one Hall sensor is used.
  • the signal processing circuit 1: 10 detects the rotation speed inside the spindle motor control circuit 103 so that the output of all three Hall sensors is used if the speed is lower than the predetermined speed. Outputs the rotation speed detection interval switching signal 202 to the interval switching circuit 113, and switches the rotation speed detection interval of the spindle motor control circuit 103 to rotate at a lower speed than the specified speed. Since the width of one pulse output by the spindle motor 102 becomes smaller, it is possible to detect the rotation speed of the spindle motor 102 in a short time even when the spindle motor 102 rotates at low speed. it can.
  • the rotation speed detection interval switching means detects the rotation speed of the spindle motor control circuit. Since the switching is performed so as to shorten the interval, the rotation speed of the spindle motor can be detected in a short time even when the spindle motor rotates at a low speed.
  • the disk device includes a CD, a CD-ROM, a CD (CD-Recordable), a CD-RW (CD-Re-Writable), and a DVD-ROM (Digital Video Disc-Read Only Memory). ), DVD-RAM (Digital Video Disc-Random Access Memory) and other devices that record and read information using a disc-shaped recording medium, and control the number of rotations of a rotating motor that rotates the disc It is useful as a device for performing

Abstract

A rotation speed detection interval switching circuit (113) for switching a rotation speed detection interval of a spindle motor control circuit (103) is provided within the circuit (103) so as to switch the rotation speed detection interval of the circuit (103) according to a rotation speed of a spindle motor (102), whereby the rotation speed of the spindle motor (102) can be detected in a short time even despite a reduced rotation speed of the spindle motor (102).

Description

明 細 書 ディスク装置 技術分野  Description Disc device Technical field
木発明は、 ディスクを回転させる回転モータの冋転速度を制御するデ イスク装置に関するものである。 背景技術  The present invention relates to a disk device that controls the rotation speed of a rotation motor that rotates a disk. Background art
ディスク装置は、 ホス トコンピュータ等の外部デバイスからの命令を 受けて目的位置をサーチし、 ディスクに記録されているデータの中から 目的のデータを読み取り、 外部デバイスに転送するものであり、 CD (Compact Disk) および CD— ROM (CD - Read Only Memory) は、 C L V (Constant Linear Velocity) の 1倍速で再生することが前提と なっている。  The disk device receives a command from an external device such as a host computer, searches for a target position, reads the target data from data recorded on the disk, and transfers the data to the external device. Compact Disk) and CD-ROM (CD-Read Only Memory) are assumed to be played at 1x speed of CLV (Constant Linear Velocity).
しかし、 コンピュータ周辺機器の CD— ROM再生装置等では、 ^速 サーチと一定速高速再生 （=一定速高速読み出し） とをコス トアップせ ずに実現することが求められ、 CD— R OMの再生時には C L Vの 4倍 速や、 8佑速等の一定速高速読み出しが行われているが、 4倍速や、 8 倍速等の C L Vによる一定速高速読み出しでサーチ速度を上げるには、 スピン ドルモータにかかる負担が非常に大きくなるので、 高価でかつ大 型のスピンドルモータが必要になる。 そこで、 近年では C. LVで記録さ れているディスクを CAV (Constant Angular Velocity) で再生する装 置や、 C LV再生ではあるが 生レンジが非常に広範囲で高速サーチと —定速高速再生とを可能にしたワイ ドレンジ C L Vシステムが実現され ている。 両方式ともスピン ドルモータにかかる負荷を非常に軽く し、 安 価で小型のモータを使用して高速サーチを実現したものである。 However, CD-ROM playback devices for computer peripherals are required to realize ^ -speed search and constant-speed high-speed playback (= constant-speed high-speed reading) without increasing the cost. A constant speed high-speed reading such as 4x speed or 8x speed of CLV is performed.However, to increase the search speed by a constant speed high speed reading by CLV such as 4x speed or 8x speed, the load on the spindle motor is required. Becomes so large that an expensive and large spindle motor is required. Therefore, in recent years, devices that play back discs recorded in C.LV with CAV (Constant Angular Velocity), and CLV playback but with a very wide raw range for high-speed search and This has realized a wide-range CLV system that has been developed. Both types greatly reduce the load on the spindle motor, A high-speed search is realized by using a small and small motor.
第 3図は、 従来のコンパク トディスク装置の構成を小-す図である。  FIG. 3 is a diagram showing a configuration of a conventional compact disk device.
第 3図において、 1 0 0は、 クランパー 1 0 ュ に支持されたディスク であり、 スピンドルモータ制御回路 1 0 3を介して信号処理回路 1 1 0 によりフィードバック制御されるスピンドルモータ 1 0 2により回転す る。 また、 1 0 5は、 ディスク 1 0 0から信号を読み取る光 式ピック ァップであり、 フォ一カス ' トラツキング制御回路 1 0 4により制御さ れるフォーカスコイル ' トラッキングコ ィ ノレ 1 0 6によりフォーカス、 及びトラッキングを調整され、 トラバースモータ制御回路 1 0 9により 制御される トラバースモータ 1 0 8によりディスクの径方向に移動する。 また、 1 0 7は、 光学式ビックアップ 1 0 5の出力からフォーカスエラ . —信号、 トラッキングエラー信号、 及び K F信兮を抽出する R Fアンプ であり 、 1 1 0は、 トラバースモ一タ制御回路 1 0 9、 フォーカス . ト ラッキング制御回路 1 0 4、 及びスピンドルモータ制御回路 1 0 3を制 御する信号処理回路である。 また、 1 1 1は C L V Z C A Vの切り替え を行なうシステムコントローラであり、 信号処理回路 1 1 0、 及び信号 処理回路インタフェース回路 1 1 2に接続されている。  In FIG. 3, reference numeral 100 denotes a disk supported by a clamper 100, which is rotated by a spindle motor 102 which is feedback-controlled by a signal processing circuit 110 via a spindle motor control circuit 103. You. Reference numeral 105 denotes an optical pickup for reading a signal from the disk 100, which focuses and is controlled by a focus coil controlled by a tracking control circuit 104 and a tracking coil 106. The tracking is adjusted, and the disk is moved in the radial direction of the disk by the traverse motor 108 controlled by the traverse motor control circuit 109. Reference numeral 107 denotes an RF amplifier that extracts a focus error signal, a tracking error signal, and a KF signal from the output of the optical pickup 105, and 110 denotes a traverse motor control circuit. This is a signal processing circuit that controls the 109, focus tracking control circuit 104, and spindle motor control circuit 103. Reference numeral 111 denotes a system controller that switches between CLVZCAV and is connected to the signal processing circuit 110 and the signal processing circuit interface circuit 112.
以下に、 動作について説明する。  The operation will be described below.
光学式ピックアップ 1 0 5によりディスク 1 0 0から読み出された信 号のうち、 フォーカスエラ一信号、 トラッキングエラ一信号、 及び R F 信号が R Fアンプ 1 0 7で抽出され、信号処理回路 ] 1 0に出力される。 信 -処理回路 1 1 0は、 K Fアンプ 1 0 7から入力された信号により、 フォーカスサーボ、 及びトラッキングサーボ用の制御信号を生成し、 フ オーカス · トラッキング制御回路 1 0 4に出力するとともに、 R F信号 を 2値化した E F M信 ^を生成し、 この E F M信号を読み取るために E F M信号に同期した位相问期ループ （P L L ) ク ロ ックを生成する。 P L Lク ロックの生成信号周波数は、 C L V時には 4 . 3 2 1 8 M H zを基準と し、 その 変範囲は ±数十％であり、 また、 ス ピン ドルモー タ 1 0 2の回転速度は、 常に P L Lクロックの周波数が -定になるよう に、 すなわち C L Vでディスク 1 0 0が回転するように、 光学式ピック アップ 1 0 5が読み取りを行なっている トラック位置に応じて順次変化 する。 信号処理回路 1 1 0は、 スピン ドルモータ制御回路 1 0 3からの 回転速度検出信号 2 0 0を演算し、 光学式ピックアップ】 0 5がディス ク 1 0 0の周縁部分から中心 '向に移動するにしたがって回転速度が次 第に早くなるようにス ピン ドルモータ制御信号 2 0 .をスピン ドルモ一 タ制御回路 1 0 3に出力する。 Of the signals read from the disk 100 by the optical pickup 105, the focus error signal, the tracking error signal, and the RF signal are extracted by the RF amplifier 107, and the signal processing circuit] 10 Is output to The signal-processing circuit 110 generates control signals for focus servo and tracking servo based on the signal input from the KF amplifier 107, outputs the signals to the focus / tracking control circuit 104, and outputs RF signals. Generates an EFM signal that is a binary signal, and generates a phase-locked loop (PLL) clock synchronized with the EFM signal to read the EFM signal. The generated signal frequency of the PLL clock is based on 4.3 218 MHz at CLV, its variation range is ± several tens of percent, and the rotational speed of spindle motor 102 is always The optical pickup 105 changes sequentially according to the track position where the optical pickup 105 is reading, so that the frequency of the PLL clock becomes constant, that is, the disk 100 rotates at CLV. The signal processing circuit 110 calculates the rotational speed detection signal 200 from the spindle motor control circuit 103, and the optical pick-up] moves from the peripheral portion of the disk 100 toward the center. Thus, the spindle motor control signal 20.sub.3 is output to the spindle motor control circuit 103 so that the rotation speed increases one after another.
-方、 C A V時には信号処理回路 1 1 0は、 ス ピン ドルモータ制御回 路 ] 0 3からの回転速度検出信号 2 0 0を演算し、 C A Vでディスク 1 0 0が回転するよ うにスピンドルモータ制御信号 2 0 1をスピン ドルモ ータ制御回路 1 0 3に出力する。  On the other hand, at the time of CAV, the signal processing circuit 110 calculates the rotational speed detection signal 200 from the spindle motor control circuit] 03, and outputs the spindle motor control signal so that the disk 100 rotates with the CAV. Output 201 to the spindle motor control circuit 103.
また、 回転速度検出信号 2 0 0は、 R F信号が欠落してもスピン ドル モータ ] 0 2が回転していれば常に出力されるので、 スビンドルモータ 1 0 2の回転状態の確認に使用することができる。 すなわち、 従来のコ ンパク 卜ディスク装置は、 回転速度検出信号 2 0 0を信 ^処理问路 1 1 0が監視することにより、 フォーカス、 またはトラッキングがはずれた り、 フォーカスサ一ボ、 またはトラッキングサ一ボが正常に動作しない 場合でも、 ス ピン ドルモータ 1 0 2の回転状態を確認することができ、 スビン ドルモータ 1 ◦ 2が異常回転したり、 停止したりすることを防い でいた。  The rotation speed detection signal 200 is always output as long as the spindle motor] 02 is rotating even if the RF signal is lost, so it is used to check the rotation state of the spindle motor 102. be able to. That is, in the conventional compact disk device, the focus or tracking deviates, the focus servo, or the tracking servo is monitored by the signal processing circuit 110 monitoring the rotation speed detection signal 200. Even when one button did not operate normally, the rotation state of the spindle motor 102 could be checked, preventing the spindle motor 102 from abnormally rotating or stopping.
しかし、 例えばス ピンドルモータに、 固定子の内周に沿って 1つのホ ールセンサが配設され、 1回転で 2冋 L o Z H i のパルス出力を発生す るブラシレスモータを使用する場合では、 ス ビン ドルモータの回転速度 を検出するスピン ドルモータ制御回路の出力である回転速度検出信 の 1パノレスの幅は、 高速问転、 例えば 7 0 0 0 r p mでは 4 . 3 ra s e c となり、 低速回転、 例えば 2 0 ◦ r p mでは 1 5 0 m s e c となる。 し たがって、 IHJ転速度検出信号を使用してスピンドルモータの回転速度を 検出すれば、 低速回転時のほうが高速回転時より も回転速度検出信号の ^ パルスの幅が大きくなるので、 低速回転時には 速回 時よりも回転 速度を検出するのに長い時間が必要になるという問题があった。 However, for example, if a spindle motor is provided with one ball sensor along the inner circumference of the stator and uses a brushless motor that generates a pulse output of 2 冋 Lo ZH i per revolution, Rotation speed of bindle motor The width of one panorama of the rotation speed detection signal, which is the output of the spindle motor control circuit that detects the rotation speed, is 4.3 rasec for high-speed rotation, for example, at 700 rpm, and 1 for low-speed rotation, for example, at 20 ° rpm. 50 msec. Therefore, if the rotation speed of the spindle motor is detected using the IHJ rotation speed detection signal, the width of the ^ pulse of the rotation speed detection signal will be greater at low speed rotation than at high speed rotation. There was a question that a longer time was required to detect the rotation speed than at the time of high speed.
本発明は、 上記のような従来の問題点を解決するためになされたもの で、 スピンドルモータが低速で回転する場合においても、 短時間でスピ ン ドルモータの回転速度を検出することができるデイスク装置を提供す ることを 的とする。 発明の開示  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and a disk device capable of detecting the rotation speed of a spindle motor in a short time even when the spindle motor rotates at a low speed. The goal is to provide Disclosure of the invention
本発明に係るディスク装置は、 回転モータの回転速度を検出する回転 速度検出手段と、 问転速度検出手段の回転速度検出間隔を切り替える回 転速度検出間隔切荇手段とを備え、 回転モータの回転速度が所定の速度 よりも低速である場合に、 回転速度検出手段の回転速度検出間隔が短く なるように切り替えるようにしたものである。 このことによって、 回転 モ一タが所定の速度よりも低速で回転する場合においても、 短時間で回 転モータの回転速度を検出することができ、 安定したディスクの制御を 行なう ことができる。 図面の簡単な説明  A disk device according to the present invention includes: a rotation speed detection unit that detects a rotation speed of a rotation motor; and a rotation speed detection interval switching unit that switches a rotation speed detection interval of a rotation speed detection unit. When the speed is lower than a predetermined speed, the switching is performed so that the rotation speed detection interval of the rotation speed detection means is shortened. As a result, even when the rotating motor rotates at a lower speed than the predetermined speed, the rotating speed of the rotating motor can be detected in a short time, and stable disk control can be performed. BRIEF DESCRIPTION OF THE FIGURES
第 1図は、 本' 明に係る好ましいコンパク トディスク装置のブロック 図であり、 第 2図は、 このコンパク トディスク装置におけるス ピン ドル モータ制御回路の回 速度検出間隔を切り替える動作を説明するための 信号波形図であり、 第 3図は、 従来のコンパク トディスク装置のブロッ ク図である。 発明を実施するための最良の形態 FIG. 1 is a block diagram of a preferred compact disk device according to the present invention, and FIG. 2 is a diagram for explaining an operation of switching a rotation speed detection interval of a spindle motor control circuit in the compact disk device. of FIG. 3 is a signal waveform diagram, and FIG. 3 is a block diagram of a conventional compact disk device. BEST MODE FOR CARRYING OUT THE INVENTION
本発明をより詳細に説述するために、 添付の図面に従ってこれを説明 する。  The present invention will be described in more detail with reference to the accompanying drawings.
第ュ図は、 本発明に係る好ましいコンパク トディスク装置のプロック 図であり、 第 1図において、 第 3図と同一部分は同一、 または相当部分 を示す。 このコンパク トディスク装置は、 第 3図に示される従来のコン パク トディスク装笸のスピン ドルモータ制御回路 1 0 3の内部に、 スピ ン ドルモータ制御回路 1 0 3の回転速度検出間隔を切り替える回転速度 検出問隔切替回路 1 1 3を設けたものである。  FIG. 3 is a block diagram of a preferred compact disk device according to the present invention. In FIG. 1, the same parts as FIG. 3 show the same or corresponding parts. This compact disk device is provided with a rotational speed for switching the rotational speed detection interval of the spindle motor control circuit 103 inside the spindle motor control circuit 103 of the conventional compact disk device shown in FIG. A detection interval switching circuit 113 is provided.
以下に、 スピン ドルモータ制御回路の回転速度検出間隔を切り替える 動作について説明する。  The operation of switching the rotation speed detection interval of the spindle motor control circuit will be described below.
第 2図は、 本発明に係る好ましいコンパク トディスク装置におけるス ピンドルモータ制御回路の回転速度検出間隔を切り替える動作を説明す るための信号波形図であり、 信号処理回路 1 1 0は、 第 2図に示すよう に、 スピンドルモータ 1 0 2の回転速度が所定の速度より も低速であれ ば、 スピン ドルモータ制御回路 1 0 3の [El転速度検出間隔が短くなるよ うにスピン ドルモータ制御回路 1 0 3の内部の回転速度検出間隔切替回 路 1 1 3に回転速度検出間隔切替信号 2 0 2を出力する。  FIG. 2 is a signal waveform diagram for explaining an operation of switching a rotation speed detection interval of a spindle motor control circuit in a preferred compact disk device according to the present invention. The signal processing circuit 110 As shown in the figure, if the rotation speed of the spindle motor 102 is lower than the predetermined speed, the spindle motor control circuit 103 of the spindle motor control circuit 103 will select [El rotation speed detection interval so as to shorten the interval. A rotation speed detection interval switching signal 202 is output to the rotation speed detection interval switching circuit 1 1 3 inside 3.
例えば、スピンドルモータに、固定子の內周に沿って電気角で】 2 0。 ずつずらした位置に 3つのホールセンサを配設したブラシレスモータを 使用する場合では、 スピン ドルモータ制御回路 1 0 3が行なうスピン ド ルモータ 1 ◦ 2の回転速度の検出に、 スピンドルモータ 1 0 2の回転速 度が所定の速度よりも高速であれば 1つのホールセンサの出力のみを使 用し、 また、 所定の速度より も低速であれば 3つ全てのホールセンサの 出力を使用するように、 信号処理回路 1 ：1 0がスピンドルモータ制御回 路 1 0 3の内部の回転速度検出問隔切替回路 1 1 3に冋転速度検出間隔 切替信号 2 0 2を出力し、 ス ピン ドルモータ制御回路 1 0 3の回転速度 検出問隔を切り替えることにより、 所定の速度よりも低速で回転するス ピン ドルモータ 1 0 2が出力する 1パルスの幅が小さくなるので、 スピ ン ドルモータ 1 0 2が低速で回転する場合においても、 短時間でス ビン ドルモータ 1 0 2の回転速度を検出することができる。 For example, on a spindle motor, electrical angle along the circumference of the stator; When using a brushless motor with three Hall sensors arranged at different positions, the spindle motor control circuit 103 detects the rotation speed of the spindle motor 1 If the speed is higher than the specified speed, only the output of one Hall sensor is used. The signal processing circuit 1: 10 detects the rotation speed inside the spindle motor control circuit 103 so that the output of all three Hall sensors is used if the speed is lower than the predetermined speed. Outputs the rotation speed detection interval switching signal 202 to the interval switching circuit 113, and switches the rotation speed detection interval of the spindle motor control circuit 103 to rotate at a lower speed than the specified speed. Since the width of one pulse output by the spindle motor 102 becomes smaller, it is possible to detect the rotation speed of the spindle motor 102 in a short time even when the spindle motor 102 rotates at low speed. it can.
以上のように、 本発明に係るディスク装置は、 ス ピン ドルモータの回 転速度が所定の速度よりも低速である場合に、 回転速度検出問隔切替手 段がス ビン ドルモータ制御回路の回転速度検出間隔を短くなるように切 り替えるので、 ス ピン ドルモータが低速で回転する場合においても、 短 時問でス ピン ドルモータの回転速度を検出することができる。 産業上の利用可能性  As described above, in the disk device according to the present invention, when the rotation speed of the spindle motor is lower than the predetermined speed, the rotation speed detection interval switching means detects the rotation speed of the spindle motor control circuit. Since the switching is performed so as to shorten the interval, the rotation speed of the spindle motor can be detected in a short time even when the spindle motor rotates at a low speed. Industrial applicability
以上のように、 本発明に係るディスク装置は、 CD, CD- ROM, C D-R (CD - Recordable), CD-RW (CD - Re-Writable), DVD - R OM (Digital Video Disc - Read Only Memory), D V D - R AM (Digital Video Disc - Random Access Memory) 等のディスク状の記録 媒体を用いて情報を記録したり読み出したりする装置の、 ディスクを回 転させる回転モ一タの回転数を制御するための装笸と して有用である。  As described above, the disk device according to the present invention includes a CD, a CD-ROM, a CD (CD-Recordable), a CD-RW (CD-Re-Writable), and a DVD-ROM (Digital Video Disc-Read Only Memory). ), DVD-RAM (Digital Video Disc-Random Access Memory) and other devices that record and read information using a disc-shaped recording medium, and control the number of rotations of a rotating motor that rotates the disc It is useful as a device for performing

Claims

請 求 の 範 囲 1 . ディスクを回転モータによって lEl転させ、 該回転モータの回転速度 を制御するディスク装 ¾において、  Scope of Claim 1. In a disk device for controlling the rotation speed of a rotating motor by rotating the disk by a rotating motor.
上記回転モ一タの回転速度を検出する回転速度検出手段と、 上記回転速度検出 段の回！ 15速度検出間隔を切り替える回転速度検出 A rotation speed detection means for detecting the rotation speed of the rotation motor; 15 Rotation speed detection to switch speed detection interval
¾隔切替手段とを備えろことを特徴とするディスク装置。 A disk device comprising: a remote switching unit.
2： 請^の範囲第 1項に記載のデイスク装置において、  2: In the disk device described in item 1 of the scope of the contract,
上 ¾回転速度検出間隔切替手段は、 卜.記回転速度検出手段の回転速度U 検出問隔を、 該回転モータの回転速度に応じて切り替えることを特徴と するディスク装置。  The rotation speed detection interval switching means switches the rotation speed U detection interval of the rotation speed detection means according to the rotation speed of the rotation motor.
PCT/JP1999/007119 1998-12-18 1999-12-17 Disk unit WO2000038186A1 (en)

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JP10/361213 1998-12-18

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KR100466927B1 (en) * 2001-09-20 2005-01-24 주식회사 히타치엘지 데이터 스토리지 코리아 Apparatus and method for detecting a speed and direction for spindle motor
CN101567204B (en) * 2008-04-22 2012-07-25 建兴电子科技股份有限公司 Main shaft motor module for CD driver
JP6428042B2 (en) * 2014-08-21 2018-11-28 株式会社デンソー Motor control device

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JPH02206386A (en) * 1989-02-06 1990-08-16 Hitachi Ltd Spindle motor control circuit
JPH04188458A (en) * 1990-11-22 1992-07-07 Seiko Epson Corp Disk chucking mechanism
JPH08275579A (en) * 1995-03-31 1996-10-18 Sony Corp Disc drive
JPH08293154A (en) * 1995-04-21 1996-11-05 Citizen Watch Co Ltd Floppy disk drive chucking mechanism
JPH09306093A (en) * 1996-05-15 1997-11-28 Toshiba Corp Disk regeneration device

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Publication number Priority date Publication date Assignee Title
JPH02206386A (en) * 1989-02-06 1990-08-16 Hitachi Ltd Spindle motor control circuit
JPH04188458A (en) * 1990-11-22 1992-07-07 Seiko Epson Corp Disk chucking mechanism
JPH08275579A (en) * 1995-03-31 1996-10-18 Sony Corp Disc drive
JPH08293154A (en) * 1995-04-21 1996-11-05 Citizen Watch Co Ltd Floppy disk drive chucking mechanism
JPH09306093A (en) * 1996-05-15 1997-11-28 Toshiba Corp Disk regeneration device

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KR20010024928A (en) 2001-03-26

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