JPH04372526A - Input power suppressor of electric-supply equipment - Google Patents

Abstract

PURPOSE:To suppress the interruption of an electric-supply equipment in operation and switching to other power source by intermittently operating accessories built in the electric-supply equipment according to predetermined conditions and by reducing power supply from a power source with limited output such as solar battery to the electric-supply equipment. CONSTITUTION:DC power is supplied from a power source with limited output, e.g. solar battery 2 and wind-power generator to an AC power supply 20. The AC power supply 20 converts inputted DC into AC by an inverter 12 and supples a load 3 with AC via transformer 13. The inverter 12 is cooled by the cooling fan 16 of a fan motor 15. When the temperature of the inverter 12 detected by a temperature sensor 21 is higher than the set temperature of a temperature setter 22, a time setter 23 is set so that a maneuvering contact 24 is closed and cooling is started only during a set-up time. Thus, input from the solar battery 2 is used effectively and the interruption of the AC power supply in operation and switching to other power source is suppressed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input power suppression device for a power supply device that suppresses input power to a power supply device that outputs a predetermined amount of electricity.

0002

2. Description of the Related Art FIG. 3 is a circuit diagram showing a general example of a power supply device. In this FIG. 3, 11 is a capacitor, 1
2 is an inverter as a power source that converts DC power input through a capacitor 11 into AC power of constant voltage and constant frequency, 13 is a transformer, 14 is a switch, 15 is a fan motor, and 16 is a supply of cooling air to the inverter 12. This is a cooling fan as an accessory device for blowing air, and these constitute the AC power supply device 10. If, for example, a solar cell 2 is connected to this AC power supply device 10, the DC power outputted by the solar cell 2 will be converted into AC power of a predetermined voltage and frequency, and this AC power will be supplied to the load 3.

0003

[Problems to be Solved by the Invention] By the way, the solar cell 2 that supplies DC power to the AC power supply 10 has a limited power supply, so if there is a shortage in the power supply, it is unavoidable to If there is a malfunction that requires measures such as stopping the AC power supply 10 and stopping the supply of AC power to the load 3, or preparing a separate AC power supply in advance and switching to this separate power supply, Ta.

[0004] Therefore, an object of the present invention is to suppress the power input to a power supply device that outputs a predetermined amount of electricity, thereby preventing a situation in which the power supply device stops or switches to another power supply device. The aim is to reduce

[0005]

[Means for Solving the Problems] In order to achieve the above object, the input power suppressing device of the present invention includes a power source that outputs a predetermined amount of alternating current or direct current power, and an accessory device attached to this power source. The power supply device comprises intermittent operation command means for causing the accessory device to operate intermittently according to predetermined conditions.

[0006]

[Operation] Conventionally, the attached devices of the power supply device built into the power supply device were operated continuously, but in this invention, the attached devices are operated intermittently according to predetermined conditions. Since the power consumed by the device is reduced, when power is supplied to the power supply from a power source with limited output such as a solar battery, the number of interruptions in the operation of this power supply is reduced, or when using other power supplies. This is intended to suppress switching to the source.

[0007]

[Embodiment] FIG. 1 is a circuit diagram showing an embodiment of the present invention.
, the names, uses, and functions of the capacitor 11, the inverter 12 as a power source, the transformer 13, and the fan motor 15 and cooling fan 16 as accessory devices are the same as those of the conventional example circuit already described in FIG. , these explanations will be omitted.

The present invention includes a temperature detector 21 for detecting the temperature of the inverter 12, a temperature setting device 22 for setting the upper limit of the detected temperature, and a time limit setting for setting the operating time of the cooling fan 16. The alternating current power supply device 20 is constituted by having the switch 23 and the on/off contact 24. Here, the temperature detected by the temperature detector 21 is the temperature detected by the temperature setting device 2.
When the value set in step 2 is exceeded, the time setting device 23 starts operating and closes the start/stop contact 24, so the AC power converted by the inverter 12 is input to the fan motor 15, and the cooling fan 16 converts the inverter 12. Start cooling. However, when the time limit set by the time limit setter 23 has elapsed, the 24
is opened, and cooling of the inverter 12 by the cooling fan 16 is interrupted. If the temperature of the inverter 12 has fallen below the set value during this cooling interruption, the cooling fan 16 will remain stopped until the temperature rises again.
If the temperature of the inverter 12 is equal to or higher than the set value when the cooling is interrupted, the cooling fan 16 starts operating again, but the operating time is the time set by the time setting device 23.

FIG. 2 is a flow chart showing the operation of the embodiment circuit shown in FIG. That is, the temperature of the inverter 12 is detected (process 31), and it is constantly monitored to see if the temperature has exceeded the set value (judgment 36), and if the temperature is above the set value, the cooling fan 16 is started to operate and the timer is set. 23 (processes 32, 33), and when the set time limit of the time limit setter 23 is reached (judgment 37), a command is given to stop the cooling fan 16 and reset the time limit of the time limit setter 23 (process 34). ,
35).

0010

[Effects of the Invention] A power supply device that converts power from a power source with a limited output, such as a solar battery, into a predetermined amount of electricity and supplies it to a load is generally attached with an accessory device such as a cooling means. Usually, this accessory device also operates continuously in conjunction with the operation of the power supply device. In the present invention, the power input to the power supply device is suppressed by attaching conditions to the operation of this accessory device and suppressing continuous operation even though it is not necessary. This has the effect of avoiding a situation where the power supply device stops due to insufficient power from the power supply device, or where the power supply device is forced to switch to another power supply device.

[Brief explanation of drawings]

[Fig. 1] Circuit diagram showing an embodiment of the present invention

[Fig. 2] Flowchart showing the operation of the example circuit shown in Fig. 1.

[Figure 3] Circuit diagram showing a general example of a power supply device

[Explanation of symbols]

2. Solar cells 3 Load 10 AC power supply device 12 Inverter as a power source 14 Switch 15 Fan motor 16 Cooling fan 20 AC power supply device 21 Temperature detector 22 Temperature setting device 23 Time limit setter 24 Start/stop contact

Claims (2)

[Claims] Claim 1: A power supply device comprising a power supply that outputs a predetermined amount of electricity or direct current power, and an accessory device attached to this power supply, in which the accessory device is operated intermittently according to predetermined conditions. An input power suppression device for a power supply device, characterized in that it is equipped with an intermittent operation command means. 2. A power supply device comprising a power supply that outputs a predetermined amount of electricity, AC power or DC power, and a cooling means for cooling the power supply, comprising: temperature detection means for detecting the temperature of the power supply device; and a time limit means for setting the operating time of the power supply device, and when the temperature of the power supply device rises above a predetermined value, the input power of the power supply device is characterized in that the cooling means is operated according to the set time of the time limit means. Suppressor.