JPS59210567A - Disk rotation controlling device of large capacity disk device - Google Patents

Abstract

PURPOSE:To reduce controlling circuit remarkably by inputting plural detection signals of number of rotations of plural disk units in a driving circuit, changing them successively, and comparing them with a specified reference signal, and controlling the disk driving motor of disk units. CONSTITUTION:Terminals of a changing operation section 32 and a changing operation section 35 are controlled in parallel at period of a fixed time (t) by a controlling section 31. Control of rotation of disk unis 1b-1e in which the detector 20 is not in the state of controlling is made by comparing the signal 11b of a disk unit 1b with a reference signal 37 corresponding to specified number of rotation from a reference signal circuit 13 inputted always to a comparator circuit 14 for a fixed time (t). A driving signal 18b is controlled from a driving circuit 15 through a switch controlling section 35 so that the disk driving motor 2b of the disk unit 1b becomes specified number of rotation. Then, the signal 11c of the disk unit 1c and a driving signal 18c are controlled to be able to input and output by the controlling section 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention provides a simple IJ system for controlling the rotation of a plurality of disk drive motors in an Otani disk device that uses a plurality of disks to record or reproduce temperature information signals. - Traditionally, multiple discs are used to control the rotation of the disc.
As a disk device for recording or reproducing information signals, there is a magnetic disc device using a magnetic method.

However, with the magnetic method, the recording density is insufficient due to the recording track width and card band width.

In a large-capacity disk device that can hold about 1 million disks in an A4-sized disk, several tens of magnetic disks are required, which increases the size of the device and increases the time it takes to search for required information. The case magnetic method is considered to be unsatisfactory in terms of reliability and reliability due to problems such as dust and flakes, problems with the lifespan of the magnetic head and recording medium, etc.

By the way, recording density is still possible, and ac recording/recording is possible in a non-contact manner.
Conventional information recording and reproducing devices that perform 8th class have been used. With this nine-character type information recording/reproducing device, the number of disks to record the 1H report of 1 million sheets of A4 size originals as described above is 10,000 disks per sheet, and the recording area on both sides is v-r. Considering the number of discs, it will be about 50 discs, and it will be significantly smaller or 0" capacity. However, about 5
Even a large-capacity disk device using zero disks has the following problems, which will be explained using one drawing.

FIG. 1 shows a block diagram of a disk rotation control unit in a conventional large-capacity disk device.

In the figure, 1α to 1g are multilayered disks 5α to 5e, 6α to 6e, etc., or the same @7α.
7C, and is configured to be rotatable by disk motors 2α to 2e, and 6α to 6e are detection units (for example, FG, etc.) for detecting the rotational speed of the disk motors 2α to 2e, 10α is a control unit for controlling the rotation of the disk motor 2α in the disk unit 1α, and 10b to 10g are control units having a similar configuration and controlling the disk units 1b and 1e. Here, the control section 10+z&, the detection circuit 12, the reference signal 1gl path 15, the comparison circuit 14. The drive circuit 151 is composed of a phase control circuit 16, a switching section 17, and the like.

1, the detector 20 is connected to the drive unit 21. The kite section 22 and control circuit 23 access the disk at the end of J9r.

Here, disk 5α6α in disk unit 1α.
・Rotation f! To explain the II control method, in Figure 1, the °C disk unit 1α has a detector 2 on the disk 6α.
0 is operated and the information '@ signal of the disk 6ct is being received, and the detection No. 18 2501 part of the detector 20 is input to the phase control circuit 16, 'C, [phase control 1gl path 16
The disc motor 2α is also controlled from the switching unit 17 through the switching unit 17. By the way, the rotation control method of the platform where the detector 20 is not accessing the disk unit 1cL (state of disk units 1b to 1e in the figure) is based on the detection unit 3α that detects the rotation speed of the disk motor 2a of the disk unit 1α. 11 is inputted into the detection circuit 12.

After molding, standard double number W! 4g from the comparison circuit 14 and
This is done by controlling the disk motor 2α by the drive unit 115 and the switching unit 17 (one configuration shown by the dotted line in the figure).

That is, for the rotation control force type binding of the disk unit in the conventional large-capacity disk device or the drive element in the take unit.

It is necessary to provide a rotation control device for controlling the rotation speed to a predetermined number of rotations, resulting in an increase in the size of the rotation control device and a significant cost increase.

[Purpose of the invention]

The purpose of the present invention is to solve the problems of the prior art mentioned above. This is a large g! An object of the present invention is to provide a disk rotation control system for controlling the disk rotation in a disk drive device, which controls several disk drive motors using one drive circuit.

[Summary of the invention]

The present invention is a disk rotation control method for a large-capacity disk device constituted by a plurality of disk units, that is, a plurality of disk drive motors. Since the inertial inertia is large, sampling control that sequentially switches the control of each disk drive motor is sufficient. The first feature is that in the disk unit where the detection section is accessed, the second feature is that it is switched to another phase control circuit and performs the rotation side. The sixth feature is that the data is input directly to the disk drive motor.

Embodiment One embodiment of the present invention will be described below with reference to the drawings. Second
The figure is a block diagram of a disk rotation control unit in a large-capacity disk device showing an embodiment of the present invention, and FIG.
1g waveform diagram of the main part in FIG. 2, and FIG. 4 is a signal waveform diagram at startup.

In these figures, the same parts as in FIG.

It is indicated by the same symbol. 60 is the disk unit 1α
61 is a control circuit unit for performing rotation side # (including phase control) from 1g- to 1g-;
a switching control unit 62 that sequentially switches signals 11a to 11C detected by detection units 3α to 3C that detect the rotational speed of disk drive motors 2α to 2e; and a switching control unit that sequentially switches and outputs drive signals 18α to 18g for disk drive motors 2α to 2e. This is a control section that switches and controls the section 35 in parallel.

Next, the operation will be explained.

Each disk unit 1α to 1e has a disk 5 mounted on the rotation axis 7α to 7e of each disk drive motor 2a to 2e.
A plurality of sheets are laminated in a multi-layered manner from α to 5e and from 6α to 6C, etc., and are configured to be rotatable. By the way, the second
As shown in the figure, when the detector 20 is in a control state with respect to the disk 6α, the disk unit 1α receives the reproduction signal 25 of the detector 20 or the signal from the detection unit 6α that detects the rotation speed of the disk drive motor 2α. 11α (o 0 when recording
) is input to the phase control circuit 16, and from the phase control circuit 16, it is input to the disk drive motor 2 via the switching control section 35.
By outputting a drive signal 18α to α, rotation control (phase control) of the disk unit 1a is performed. Next, the detector 20 enters the control state and the disk unit 1
The rotation control methods from b to 16 are for each disk drive motor 2.
1 of the detection parts 3b to 6e that outputs the rotation speed of 2e from b
The signal 3 which is sequentially switched through the switching control section 62 which sequentially switches the signal 11e and outputs the signal 66 as the signal 66.
3 is input to the detector 'R112. Detected there 1gl
The signal 36 whose waveform has been shaped in the circuit 12 is input to the comparison circuit 14, and the signal 66 is compared with a signal 67 corresponding to a predetermined rotation speed which is also input from the reference circuit 13 to the comparison circuit 14. Disk units 1b to 1 corresponding to
The output of the drive circuit 15 is applied to the disk drive motor 2b so that the rotation speed of the disk unit in 6 becomes a predetermined rotation speed.
The drive signal 185 from 2e to 2e is set to 18g, and the switching control unit 35 is sequentially switched and applied to control 2g from each disk drive motor 2b. Here, the switching control section 32 and the switching control section 350 are controlled by the control section 61, and the detector 20 is controlled by the signal 11α and drive signal 18α of the disk unit 1α.

The signal 1 of the remaining disk units 1b to 1e is controlled to form a closed circuit with the phase control circuit 16.
1A to 11g and drive signals 186 to IBt are controlled so that the (ILT number and drive signal of each disk unit are controlled simultaneously).

That is, as shown in FIG. 3, the detector 20 is brought into the control state by controlling the terminals of the switch-off section 32 and the switch-over section 35 in parallel by the control section 31 for one period of time (Q period). The rotation control of the disk units 1b to 1e is performed for a certain period of time (t) by detecting the 1g number 11b of the disk unit 1b via the detection circuit 12 and the B1 from the reference every-number circuit 16, which is always input to the comparison circuit 14.
Comparing with the reference number 37 corresponding to one rotation speed, the drive signal 18b is applied from the drive circuit 15 via the switching control unit 35 so that the disk drive motor 2h of the task unit 15 has a predetermined rotation speed. control. Next, the control section 61 controls the switching control section 32 and the switching control section 65.
The disk unit icO) signal 11C and the drive signal 18c are controlled to be able to be input and output from each terminal of the disk unit) IA+7. ) is controlled in the same way as rotation control. In this way, - mud time 1b1 (with the period.

Each terminal of the switching control section 32 and the switching control section 35.

Signals 111) from disk units 1b to 1e 11
The rotation control of each disk unit is performed by switching the discs 18b to 18g from 18b to 18g to the 1st subrow.

Generally, the M foot rotation speed of each disc unit is 18
00γ・pIIm, one revolution is 65.5m
s e c, and if there are four disk units that require switching control as shown in the figure, and considering one control per rotation, approximately f3ms per disk unit.
The control time is e c (corresponding to t), and sufficient control is possible.

Next, the control at the time of starting each disk unit 1α to 1t will be explained using FIG. 4.

In other words, as mentioned above, the disk unit 1α may be 1C.
When starting the disk unit 1α, where the detector 20 is controlled, continuous control is performed by the one-phase control circuit 16, so there is no particular problem, but since the disk units 1b to 1e are under switching control, the Considering the amount of inertia, the startup time will be extremely long. Therefore, as shown in FIG.
), an initial operation is performed at a constant voltage (Vl), and after a certain period of time (T) has passed, the disk unit 1α performs phase control, and the disk units 1b to 1e perform sampling control by switching operation.

[Effects of the Invention] As described above, one feature of the disk rotation control device for a large-capacity disk device of the present invention is that each disk unit has a configuration in which a plurality of disks are stacked in a multilayered manner, and has a large inertia. Therefore, a disk unit having a disk whose detector is controlled by one control circuit section is configured to be controlled by a phase control circuit, and other disk units are configured to be controlled by a switching control section. Since the controller switches sequentially at fixed intervals for control, the number of control circuits for the disk drive motor in the disk unit can be significantly reduced, and disk rotation in large-capacity disk devices with a small space configuration can be achieved at low cost. A control device can be provided.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a conventional device, Figure 2 is a block diagram showing an embodiment of the present invention, Figure 6 is a signal waveform diagram of the main parts of Figure 2, and Figure 4 is a signal at startup. FIG. 1α to 1e: Disk units 2α to 2e: Disk drive motors 5α to 3C: Detection units 5α to 5e, 6α to 6C: Disks 11α to 11C
: Signals 18α to 18e: Drive signal 30: Control circuit section 31: Control section 32, 55 two-switching section Fig. 37 Foil Fig. 4 292 Yoshida-cho, Totsuka-ku, Yokohama City

Claims (1)

[Claims] 1 A disk unit comprising a plurality of disks stacked coaxially in a multilayered manner, and a plurality of the disk units, each of which is configured to be rotated at a constant tar by an independent disk drive motor. In a large-capacity disk device equipped with a detection unit for recording an information signal in a recording area of the disk or reproducing recorded information, a plurality of detection devices for detecting the rotational speed of the plurality of disk units are provided. and inputting a plurality of detection signals from the plurality of detection devices to one drive circuit,
In the fan circuit, the plurality of detection signals are sequentially switched and inputted, and the reference signal of the P9T foot is compared with the inputted detection signal to control the disk drive motor of the disk unit. Disk rotation control device for Taihosho disk device.