JPH04112622A - Power supply - Google Patents

Abstract

PURPOSE:To prevent erroneous function of a load, which is relatively susceptible to electrical noise, by connecting such load with power supply with a time delay, set by a timer, behind connection of a large noise generating load with power supply. CONSTITUTION:When a plug 1 is inserted into an AC 100V power supply and a power switch 2 is turned ON, power supply is applied simultaneously on loads 7, 8 and a timer 15. The loads 7, 8 have relatively high starting current and produce noise in the power supply, but the starting current attenuates as time elapses after turn ON of the power switch 2. When loads 9, 10 are connected with power supply by closing a timer contact 16 with a time delay set by the timer 15, noise is reduced and connection with power supply can be made without causing erroneous function of the loads 9, 10 which are susceptible electrical noise.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device that supplies power to a plurality of electrical devices, such as loads such as personal computers, by closing a single power switch.

[Conventional technology]

Fig. 2 is a circuit diagram showing a conventional power supply device. Outlets connected in parallel to 1, 7 to 1
0 is a load connected to the outlets 3 to 6 by plugs 11 to 14.

Next, the operation will be explained. Load 7 goes to outlet 3,
It is assumed that the load 8 is connected to the outlet 4, the load 9 to the outlet 5, and the load 10 to the outlet 6 by plugs 11 to 14, respectively. In this state, when the plug 1 is connected to a power source of AC100, for example, and the power switch 2 is turned on, power is supplied to the loads 7 to 10 at the same time.

[Problem to be solved by the invention]

Conventional power supply devices are configured as described above, so if multiple loads are connected to the power source at the same time by operating one power switch in order to improve operability, the capacity of the power source may be small, or the power switch may If there is a load with a large starting current when it is turned on, there is a problem that the load, which is relatively susceptible to electrical noise, may malfunction.

This invention was made to solve the above-mentioned problems, and even when multiple loads are connected to the power supply at the same time by operating a single power switch, it prevents malfunctions of loads that are relatively susceptible to electrical noise. The purpose is to obtain a power supply device that can

[Means to solve the problem]

The power supply device according to the present invention includes a first load whose starting current is large and generates noise, which is connected in parallel between the power supply terminals via one power switch, and a first load which is connected in parallel with the first load. A second electrical noise-sensitive second circuit is connected in parallel with the timer via a timer contact that closes after the timer's set time.
It is equipped with a load of .

[Function] The power supply device of the present invention supplies power to a first load and a timer that generate electrical noise when one power switch is turned on, and sets a timer setting time during which the electrical noise generated by this power supply is reduced. By later feeding power to the second load, which is susceptible to electrical noise, it is possible to reliably prevent the second load from malfunctioning due to electrical noise and voltage fluctuations.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. In Fig. 1, in which the same parts as in Fig. 2 are given the same reference numerals and redundant explanations are omitted, 15 is connected in parallel with loads 7 and 8 as the first loads, which have a large starting current and generate noise. A timer 16 is a load 9 as a second load that is susceptible to electrical noise. This is a timer contact that connects IO in parallel with timer 15.

Next, the operation of the above embodiment will be explained. Connect the plug l to, for example, AC 100V electric fi (Ia not shown), load 7 to outlet 3, load 8 to outlet 4, load 9.
It is assumed that the load 10 is connected to the outlet 5 and the load 10 is connected to the outlet 6 by plugs 11-14, respectively. In this state, when the plug 1 is connected to, for example, an AClooV power source and the power switch 2 is turned on, power is applied to the load 7, the load 8, and the timer 15 at the same time.

The loads 7 and 8 have a relatively large starting current and generate noise from the power source δ, but this starting current attenuates with the passage of time from when the power switch 2 is turned on. Therefore, when the timer contact 16 closes after the time T set in the timer 15 and the load 9.10 is connected to the power supply, the noise is also small, causing the load 9.10, which is sensitive to electrical noise, to malfunction. Can be connected to an external power source without needing to be connected.

C Effects of the Invention As described above, according to the present invention, when the power switch is turned on, the power connection of the load that is susceptible to electrical noise is delayed by the time set in the timer compared to the power connection of the load that generates a large amount of noise. Therefore, when a plurality of loads are connected to a power source by operating one power switch in order to improve operability, it is possible to reliably prevent malfunctions of loads that are susceptible to electrical noise.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a power supply device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional power supply device. 2 is a power switch, 7.8 is a first load, 9°10 is a second load, 15 is a timer, and 16 is a timer contact. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A first load whose starting current generates a large noise is connected in parallel between power supply terminals via a power switch, a timer connected in parallel with the first load, and a timer that closes after a set time of the timer. A power supply device comprising a second load susceptible to electrical noise and connected in parallel with the timer via a contact.