JPS6288491U - - Google Patents
Info
- Publication number
- JPS6288491U JPS6288491U JP1985180187U JP18018785U JPS6288491U JP S6288491 U JPS6288491 U JP S6288491U JP 1985180187 U JP1985180187 U JP 1985180187U JP 18018785 U JP18018785 U JP 18018785U JP S6288491 U JPS6288491 U JP S6288491U
- Authority
- JP
- Japan
- Prior art keywords
- pulse width
- circuit
- controlled
- width modulation
- switching elements
- 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
Links
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000003079 width control Methods 0.000 claims 2
- 230000005284 excitation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Rotational Drive Of Disk (AREA)
Description
第１図は本考案によるパルス幅変調制御モータ
駆動回路の実施例を示す回路ブロツク図、第２図
、第３図および第４図は第１図の各回路の詳細を
示す回路図で、トリガ回路、同期回路および駆動
回路をそれぞれ示している。第５図は第１図の動
作を説明するためのタイムチヤートである。
１……トリガ回路、２……同期回路、３……駆
動回路、４……３相ＤＣブラシレスセータ、５，
６，７，１４，３２……インバータ回路、８，９
，１０……アンド回路、１１……オア回路、１２
，１８……デイレー回路、１３……イクスクルー
シブオア回路、１５，１７……４ビツトカウンタ
、１６……ラツチ回路、１９……単安定マルチバ
イブレータ、２０……波形整形回路、２１〜２４
，２６〜３１，３３……トランジスタ。
FIG. 1 is a circuit block diagram showing an embodiment of a pulse width modulation control motor drive circuit according to the present invention, and FIGS. 2, 3, and 4 are circuit diagrams showing details of each circuit in FIG. circuit, a synchronous circuit, and a drive circuit, respectively. FIG. 5 is a time chart for explaining the operation of FIG. 1. 1...Trigger circuit, 2...Synchronization circuit, 3...Drive circuit, 4...3-phase DC brushless sweater, 5,
6, 7, 14, 32...Inverter circuit, 8, 9
, 10...AND circuit, 11...OR circuit, 12
, 18... Delay circuit, 13... Exclusive OR circuit, 15, 17... 4-bit counter, 16... Latch circuit, 19... Monostable multivibrator, 20... Waveform shaping circuit, 21-24
, 26-31, 33...transistor.
Claims (1)
切換素子からの出力信号によりスイツチング素子
をオンオフ制御して各相の励磁状態を作り、同時
にパルス幅変調信号によつても前記スイツチング
素子をオンオフ制御することにより速度制御を行
なう磁気デイスク装置のパルス幅変調制御モータ
駆動回路において、前記相切換素子からの出力信
号を立上がり、立下がり時のトリガ信号を作成す
るトリガ回路と、前記トリガ信号を受けて、前記
パルス幅制御信号の立下がりを、その駆動時間と
非駆動時間の比を保持した状態で、前記相切換素
子からの出力信号の立上がり、立下がりに一致さ
せる同期回路とを設け、前記同期回路の同期パル
ス幅制御信号により前記スイツチング素子をオン
オフ制御して速度制御するように構成したことを
特徴とする磁気デイスク装置のパルス幅変調制御
モータ駆動回路。 The motor rotation position is detected, and the switching elements are controlled on and off using output signals from the phase switching elements that are sequentially outputted to create an excitation state for each phase, and at the same time, the switching elements are also controlled on and off using pulse width modulation signals. In a pulse width modulation control motor drive circuit of a magnetic disk device that performs speed control by , a synchronization circuit is provided to match the fall of the pulse width control signal with the rise and fall of the output signal from the phase switching element while maintaining the ratio of the drive time to the non-drive time; 1. A pulse width modulation control motor drive circuit for a magnetic disk device, characterized in that the switching element is controlled on and off by a synchronous pulse width control signal of the circuit to control speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985180187U JPS6288491U (en) | 1985-11-22 | 1985-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985180187U JPS6288491U (en) | 1985-11-22 | 1985-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6288491U true JPS6288491U (en) | 1987-06-05 |
Family
ID=31123914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985180187U Pending JPS6288491U (en) | 1985-11-22 | 1985-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6288491U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03253290A (en) * | 1990-03-01 | 1991-11-12 | Matsushita Electric Ind Co Ltd | Driving device for brushless motor |
-
1985
- 1985-11-22 JP JP1985180187U patent/JPS6288491U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03253290A (en) * | 1990-03-01 | 1991-11-12 | Matsushita Electric Ind Co Ltd | Driving device for brushless motor |
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