JPH0310308A - Power supply device for information processor - Google Patents

Abstract

PURPOSE:To reduce the power consumption at the time of not mounting incorporated accessory devices yet and to prevent the occurrence of noise of a cooling fan motor by switching the rotational frequency of the cooling fan motor in accordance with presence/absence or the number of accessory devices like peripheral devices incorporated in an information processor. CONSTITUTION:A signal A which is outputted from an incorporated peripheral device 3 and is made effective for mounting of the incorporated peripheral device is inputted to a control part 1a of the information processor main body and a power supply device 2a. When the signal A is effective, the power supply device 2a converts the voltage of a power line B supplied to a cooling fan motor 5 to switch the rotational frequency of the cooling fan motor 5; and when the signal A is ineffective, the voltage of the power line B supplied to the cooling fan motor 5 is controlled to return the rotational frequency of the motor 5 to the original value. The voltage supplied to the cooling fan motor 5 of the information processor is switched in this manner to reduce the power consumption at the time of partial mounting of peripheral devices, and the occurrence of noise or the like of the motor is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device for information processing equipment, and particularly to a power supply device built into information processing equipment.

[Conventional technology]

In the conventional power supply device for information processing equipment, as shown in FIG.
This supplies current to the information processing equipment main body control section 1a, and also supplies current to the cooling fan motor 5 through the power supply line B.

The power supply device 2C is configured to always control the drive of the cooling fan motor 5 regardless of the presence or absence of a peripheral device 3 such as a hard disk drive or floppy disk drive built into the information processing device. Therefore, the cooling fan motor 5 of the above-mentioned power supply device is equipped with a built-in peripheral W for quality assurance of the power supply device and information processing equipment.
The maximum permissible number of mounting units was assumed to be 3, and the rotation speed was set to sufficiently cool them.

[Invention or problem to be solved]

The conventional power supply device for information processing equipment described above is configured to always drive the cooling fan motor with a constant voltage assuming the maximum permissible number of built-in peripheral devices, regardless of the presence or absence of built-in peripheral devices. Therefore, if peripheral devices are not installed in information processing equipment or only some peripheral devices are installed, not only will power consumption be wasted, but there will also be noise from the fan, vibrations caused by rotation, and motor drive. The disadvantage is that it is very noisy.

[Means to solve the problem]

A power supply device for an information processing device according to the present invention inputs a signal indicating the presence or absence or number of attached devices built into the information processing device, and responds to the information processing device incorporating the attached device or the attached device according to this signal. The present invention is characterized in that the voltage applied to the cooling fan motor of the information processing device is switched so that the number of rotations is required to cool the information processing device that does not have a built-in information processing device.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. A signal A that is output from the built-in peripheral bag N3 and becomes valid when the built-in peripheral device is mounted is input to the power supply device 2a together with the information processing equipment main body control section 1a.

When the signal A becomes valid, the power supply device 2a converts the voltage of the power supply line B that is supplied to the cooling fan motor 5, and switches the rotation speed of the cooling fan motor 5. Further, when the signal A becomes invalid, the power supply B supplied to the cooling fan motor 5 is controlled, and the rotational speed of the cooling fan motor 5 is returned to the original rotational speed.

In this way, when the signal A is valid, the rotation speed of the cooling fan motor 5 is set to
and the built-in peripheral device 3, and when signal A is invalid, the information processing equipment main body control unit]a and the power supply unit 2a are driven at a low rotation speed that is sufficient to cool only the power supply 2a. It is driven to become.

FIG. 2 is a block diagram of another embodiment of the invention. The information processing equipment main body control unit]b receives the signal A representing the presence or absence of an option from each option 4, generates a confidence D corresponding to the number of installed options 4, and inputs it to the power supply device 2b. The power supply device 2b operates the cooling fan motor 5 according to the signal.
The power supply line B to the cooling fan motor 5 is controlled. In this way, the rotation speed of the cooling fan motor 5 is switched according to the number of options 4 installed.

〔Effect of the invention〕

As explained above, the present invention reduces power consumption when built-in auxiliary devices are not installed by switching the rotation speed of the cooling fan motor depending on the presence or absence or number of auxiliary devices such as peripheral devices built into information processing equipment. It also has the effect of preventing noise from the cooling fan motor. In addition, in terms of forced air cooling of the power supply device by a cooling fan, by reducing the volume of the power supply device and by using a power supply device with a reduced volume, it is possible to reduce the size and weight of the information processing device.

Option 5: Cooling fan motor.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a block diagram of another embodiment of the present invention, and FIG. 3 is a block diagram of a conventional power supply device for information processing equipment. la, lb... Information processing equipment main body control unit, 2a.

Claims (1)

[Claims] A signal indicating the presence or absence or number of attached devices built into the information processing device is input, and the information processing device with the built-in attached device or the information processing device without the built-in attached device is cooled in accordance with the signal. 1. A power supply device for information processing equipment, characterized in that a voltage applied to a cooling fan motor of the information processing equipment is switched so that a rotation speed required for the information processing equipment is achieved.