KR0116637Y1 - Disk drive appartus - Google Patents

Abstract

The present invention relates to a disc drive device, and more particularly, to a disc drive device that prevents slip of the disc during disc stop or break.

To this end, a control unit, a first gain change unit and a second gain change unit are provided to attenuate the amount of current required to drive the motor so that the overcurrent does not flow.

Therefore, there is an effect that can prevent the sliding of the disk due to the overcurrent of the motor drive.

Description

Disc drive

1 is a block diagram of a conventional disk drive apparatus.

2 is a diagram showing a disc and a turntable spacing during disc drive.

3 is a block diagram of a disc drive device according to the present invention.

4 is a waveform diagram according to FIG.

Explanation of symbols for main parts of the drawings

10... First direction determining unit 20. Second Direction Decision Unit

30... Forward motor drive section 40... Reverse motor drive

50... Motor 60... disk

70... Turntable 80... Control

90... First gain changing unit 100. Second Gain Change Department

The present invention relates to a disc drive device, and more particularly, to a disc drive device that prevents slip of the disc during disc stop or break.

In general, the disk drive unit is in close contact with the turntable to drive the disk at a constant speed in accordance with the rotation of the motor.

1 shows a block diagram of a conventional disk drive apparatus.

In FIG. 1, when a user's control command is applied from a key input unit (not shown), the first direction determining unit 10 or the second direction determining unit 20 determines the rotation direction of the disc. Here, the signal to which the user's control command is applied is a pulse width modulation signal.

The forward motor driver 30 and the reverse motor driver 40 drive the motor 50 according to a signal output from the first direction determiner 10 or the second direction determiner 20.

2 is a diagram showing the distance between the disk and the turntable when the disk is driven.

FIG. 2 (a) shows the disc and the turntable spacing during the disc reproducing drive, and FIG. 2 (b) shows the disc and the turntable spacing during the disc stop driving.

In the disc reproducing drive in FIG. 2 (a), the disc 60 is brought into close contact with the turntable 70 and driven by the motor 50.

In the disc stop driving in Fig. 2 (b), the disc 60 opens with the turntable 70 at a predetermined interval.

However, the conventional disk drive apparatus uses the high level and low level signals for a predetermined period of time without using the pulse width modulation signal during the disk stop driving, so that the forward motor driving unit 30 and the reverse motor are used. Overcurrent flows through the driver 40. At this time, there is a problem in that the disc 60 is slipped due to the deterioration of the motor driving unit 30 and the reverse motor driving unit 40 and the sudden change in the speed of the motor 50, thereby making it difficult to accurately reproduce the disc.

Accordingly, an object of the present invention is to provide a disk drive device that prevents the sliding of the disk by controlling the amount of current applied to the motor drive unit in order to solve the above problems.

In order to achieve the above object, a disc drive device comprising a first direction determiner and a second direction determiner for determining a rotation direction of a disc, a forward motor driver and a reverse motor driver for driving a motor, and a motor for rotating the disc. To

A first gain changer and a second gain changer for attenuating signals output from the first direction determiner and the second direction determiner by a predetermined amount of current and applying them to the forward motor driver and the reverse motor driver;

And a control unit for activating and controlling the first gain changing unit and the second gain changing unit when a stop command signal or a disk driving command signal is input as an input.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of a disk drive apparatus according to the present invention.

In FIG. 3, the disc drive device of the present invention includes a first direction determiner 10 and a second direction determiner 20 for determining the rotational direction of the disc, and for driving the rotation of the disc in the forward or reverse direction. Adjusting the amount of current of the output signal from the forward motor drive unit 30 and the reverse motor drive unit 40, the motor 50 for rotating the disk, the first direction determiner 10 and the second direction determiner 20 The control unit 80 controls the first gain changing unit 90 and the second gain changing unit 100, and the first gain changing unit 90 and the second gain changing unit 100.

Next, the operation of the block diagram shown in FIG. 3 will be described.

When a user's control command is applied from the key input unit (not illustrated), the first direction determining unit 10 or the second direction determining unit 20 determines the rotation direction of the disc.

If the control command of the user is a disk stop command or a disk drive command, the controller 80 recognizes the disk stop command or the disk drive command and then moves to the first gain change unit 90 and the second gain change unit 100. By sending the level signal, the first gain changing unit 90 and the second gain changing unit 100 are activated.

The first gain changing unit 90 and the second gain changing unit 100 attenuate the signal output from the first direction determining unit 10 or the second direction determining unit 20 by a predetermined amount of current.

The forward motor driver 30 or the reverse motor driver 40 drives the motor 50 by receiving a signal output from the first gain changer 90 or the second gain changer 100 as an input.

4 shows a waveform diagram according to FIG. 3.

4 (A ') is a signal of the control unit 80, 4 (B') is a pulse width modulation signal input to the first direction determiner 10 or the second direction determiner 20, the fourth (C ') is a signal input to the forward motor driver 30 or the reverse motor driver 40.

The operation waveform of FIG. 4 will be described with reference to FIG.

If a stop command or a brake command is input among the user's control commands, the controller 80 outputs a high level signal as shown in FIG. 4 (A '). Next, while the output signal of the controller 80 maintains the high level state, the pulse width of the pulse width modulated signal corresponding to the high level state is extended. In this case, the first gain changing unit 90 and the second gain changing unit 100 attenuate by a predetermined amount of current Δt during the high level state of the controller 80 as shown in the fourth C ′. The current attenuated by a predetermined amount of current is input to the forward motor driver 30 or the reverse motor driver 40.

As described above, the disc drive device of the present invention has an effect of preventing the disc from slipping due to overcurrent by driving the motor by attenuating a predetermined amount of current during the stop command or the brake command of the disc.

Claims (1)

A disk drive apparatus comprising a motor for rotating a disk, a direction determiner for determining a rotation direction of the disk based on a PWM signal and outputting a motor drive current, and a motor driver for driving the motor by the motor drive current. When the stop command or the start command of the disk is input, the motor driving unit is extended by extending the period in which the PWM signal is high for a predetermined time from the time when the stop operation or the start operation starts to the time when the stop operation and the start operation ends. A control unit which outputs a control signal for the control unit; And And a gain changer configured to attenuate a motor drive current output from the direction determiner by a predetermined amount and output the motor drive current to the motor driver during the extended PWM signal period based on the control signal output from the controller. Device.