JPH04285440A - Power supply apparatus - Google Patents

Abstract

PURPOSE:To immediately detect abnormality even if a worst case of fire occurs by a method wherein an abnormality detecting means which detects the abnormality of five senses elements such as sound, odor, vibration, etc., in a power supply apparatus and a discriminating means which judge the abnormality are provided. CONSTITUTION:When the breakage, burning, fire, smoke, etc., of appliances and components in a power supply apparatus are created, they are detected by a composite detector 17 composed of a sound detector for the breakage, an odor detector for the burning, a photodetector for the fire, a smoke detector for a smoke, etc. Then information such as the magnitude of detected values, a time while the detection is continued, whether or not a plurality of the detectors, etc., are operated is judg by a judg means 18. If abnormality exists, a siwtch 15a is automatically selected. With this constitution, the abnormality of the power supply apparatus caused by the defects of the appliances and components such as contact defects, insulation defects, characteristics defects, aging deterioration, etc., can be detected to perform a protective action and power can be supplied to a load 16 stably.

Description

[Detailed description of the invention]

[Purpose of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device such as an uninterruptible power supply device capable of highly reliable power supply.

0002

2. Description of the Related Art Generally, as shown in FIG. 4, a power supply device to which the present invention is applied converts AC power from an AC input power source 10 into DC power using a rectifier 11, and converts it back into AC power using an inverter 13. It also has a function to similarly invert the power from the storage battery 14 when the AC input power supply fails.
It also has the function of converting into alternating current power by the converter 13, and can supply power to the load 16 without interruption.

Power flows to the load 16 from an AC input power source 10 to a rectifier 11 and an inverter 13 as shown in FIG.
, the switch (lower side) is supplied by route A passing through the switch (lower side) 15b, but as mentioned above, when the AC power supply 10 is out of power, the power is supplied from the storage battery 14 to the inverter 13 and the switch (lower side).
It is fed by the B route passing through 15b. Backup power supply 1
The C route passing through the switch (upper side) 15a from 2 is the A route.
When an abnormality occurs in the load 16, power is continuously supplied to the load 16 without momentary interruption.

[0004] Abnormalities in the A and B routes shown in FIG. 5 are detected by various protection detectors provided in the power supply, and the switch (upper side) 15a is automatically selected to switch to the C route. have. FIG. 2 shows the protective detectors installed in the power supply device using JEM-1090 equipment symbols. The equipment symbols are explained below. 59: Detect AC overvoltage. 27: Detect AC undervoltage. 47: Detect open phase or negative phase voltage. 26: Detect temperature. 80: Detect DC undervoltage. 45: Detect DC overvoltage. 76: Detect DC overcurrent. 51: Detect alternating current overcurrent. The detectors will hereinafter be referred to as first abnormality detection means. Generally, in addition to this first abnormality detection means, an abnormality detector related to control abnormalities, such as a control power supply abnormality detector, a control microcomputer abnormality detector, etc., is provided.

[0005]

[Problems to be Solved by the Invention] As mentioned above, the power supply device is equipped with various protection detectors in the AC input section, DC section, output section, and control, and in the event that an abnormality inside the device is detected, , the switch (upper side) 15a is automatically selected to continue supplying power to the load 16 without momentary interruption.

Generally, these abnormalities are detected by protective detectors detecting changes in electrical signals caused by initial defects, changes in characteristics due to deterioration over time, or damage to equipment components that make up the device, and detecting the presence or absence of abnormalities. Deciding. There are various cases in which equipment parts become abnormal, and in the worst case scenario, it can lead to a fire.

[0007] There are cases in which the ignition of appliance parts does not result in an immediately detectable change in the electric signal, and in this case, the fire spreads and secondary damage is detected and protective actions are taken.

[0008] In such a game, the conventional power supply has the disadvantage that the damage to the device becomes large and the continuous supply of power to the load 16 is stopped before secondary damage occurs. It was in the device. Therefore, the purpose of the present invention is to
An object of the present invention is to provide a power supply device having a protection detection function that can be immediately detected. [Structure of the invention]

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention is characterized by having the following means. That is, in a power supply device that converts power from an AC input power source and supplies it to a load, in addition to the first abnormality detection means that detects electrical abnormalities such as overvoltage, overcurrent, and undervoltage of this power supply device, the above-mentioned A second abnormality detection means for detecting an abnormality in five sense elements such as sound, smoke, smell, vibration, etc. inside the power supply device, and comparing information of this second abnormality detection means with information when the power supply device is normal. The power supply device is characterized in that it includes a determining means for determining whether the power supply device is abnormal.

0010

[Operation] Sound, smoke, light detected by the second abnormality detection means,
Information on smells, vibrations, etc. is stored as initial values during normal operation by the learning function when the power supply device operates under predetermined operating conditions.

[0011] When a state that is not in the learned value occurs in the power supply, it is determined whether it is an abnormal state based on the magnitude of the value, duration, presence or absence of composite detection, etc. ) 15a, stops the power supply, and issues an alarm to the outside.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In the figure, 17 is a second abnormality detection means for detecting sound, smoke, light, smell, vibration, etc.; 18 is a determination means for storing and determining information from this second abnormality detection means 17; The circuit components shown have the same functions as those in FIG. 4, are given the same numbers, and their explanations will be omitted.

In FIG. 1, while supplying power to a load 16 while converting power from an AC input power source 10 or a storage battery 14, appliance parts inside the power supply device may explode, burn out, catch fire, emit smoke, etc. When this occurs, rupture is mainly detected by a sound detector, burnout by a smell detector, ignition by a light detector, and smoke by a smoke detector, or by multiple detectors simultaneously. Information such as the magnitude of the value detected by these detectors, the detection duration, and the presence or absence of operation of multiple detectors is determined by the determination means 18, and when an abnormality occurs, the switching device (upper side)
15a is automatically selected. In this way, by adding this function to the conventional protection function using electrical signals, it is possible to prevent abnormalities in equipment parts, such as poor contact, poor insulation, poor characteristics, aging deterioration, etc., from occurring due to various cases. Since abnormalities in the power supply device are quickly detected and protective operations are performed, power can be stably and continuously supplied to the load 16.

FIG. 3 is a block diagram showing another embodiment of the present invention. In the figure, 19 is a breaker, 20 is an inverter device, and other circuit components shown have the same functions as those in FIG. 1. Therefore, its explanation will be omitted.

FIG. 3 shows a state in which two inverter devices are connected in parallel. The power from the AC input power supply 10 is input to two inverter devices, and the converted power is connected in parallel by turning on the breaker 19 of each inverter device, and is stabilized in the load 16. It is a parallel redundant power supply system that supplies electric power, and when an abnormality occurs in one inverter device in this system and the second abnormality detection means 17 detects the abnormality, the system is shut off via the determination means 18. 19 is opened, and the inverter device in which the abnormality has occurred is disconnected from the parallel connection state. This eliminates the influence on one of the inverter devices and allows stable supply of power to the load 16 to be continued.

[0016] The power supply device has the role of continuously supplying power from the storage battery to the load during a power outage of the AC input power source. An abnormality occurs. Conventionally, in these cases, protection was detected using only electrical signals, so there was a risk that the abnormality could not be detected at the time it occurred, causing further damage and stopping the power supply to the load.

[0017] In addition to the first abnormality detection means for detecting abnormalities such as overvoltage and overcurrent, the present invention also detects abnormalities such as sound, smoke, light, odor,
Adding a second abnormality detection means for detecting abnormalities such as vibration,
The system is characterized in that it is possible to quickly detect abnormalities in the power supply device and perform protective operations based on the combined conditions of these detection signals.Continuation of power supply to the load 16 is
A backup power source or a redundant parallel inverter may be used, and the power source or device is not limited.

Therefore, FIG. 3 shows the backup power supply 12 shown in FIG.
This method also satisfies the gist of the present invention by providing the functions of the switching devices 15a and 15b, and switching to power supply from the standby power source if an abnormality occurs in one or all of the inverter devices.

[0019]

As described above, according to the present invention, it is possible to provide a power supply device that can obtain the following effects.

(1) It is possible to detect an abnormality in a five-sensory element that cannot detect an electric signal at the time of abnormality, and based on this result, it is possible to stop the power supply device while continuing power supply to the load.

(2) Even in the worst case where smoke, ignition, or the like occurs, it is possible to take measures to minimize damage by automatically stopping the power supply and giving an alarm, and abnormality diagnosis is quick and easy. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram for explaining protection detectors used in a conventional power supply device.

FIG. 3 is a block diagram showing another embodiment of the present invention.

FIG. 4 is a block diagram of a power supply device to which the present invention can be applied.

FIG. 5 is a flow diagram of power flow for explaining the functions of the power supply device shown in FIG. 4;

[Explanation of symbols]

10...AC input power supply, 11...rectifier, 12...standby power supply,
13...Inverter, 14...Storage battery, 15a, 15b...Switcher, 16...Load, 17...Combined detector, 18...Judgment device,
19... Breaker, 20... Inverter device.

Claims (1)

[Claims] Claim 1: A power supply device that converts power from an AC input power source and supplies it to a load, in addition to first abnormality detection means for detecting electrical abnormalities such as overvoltage, overcurrent, and undervoltage in the power supply device. a second detection means for detecting an abnormality in the five sense elements such as sound, smoke, smell, vibration, etc. inside the power supply; and information on the second abnormality detection means and the second detection means when the power supply is normal. 1. A power supply device comprising: a determining means for comparing information from a second abnormality detecting means to determine an abnormality in the power supply device.