JPS61203824A - Power source unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a power supply device configured to be able to receive power from either a three-phase three-wire power source or a three-phase 41iA power source, and in particular, The present invention relates to a power supply device suitable for preventing incorrect selection of power sources.

[Background of the invention]

The following are some ways to make electronic devices compatible with the world's power source situation.

(1) If the power consumption of the electronic device is small, by making it so that it operates on a single phase, you can use the 3-phase 3A type, that is, the line power when the line voltage is 200VAC to 230VAC, or the 3-phase 4-wire type. That is, the line voltage is 380 VAC ~ 4
At 15VAC, receive power between the line and neutral.

(2) When the power consumption of the electronic device is large, it is made to operate in three phases, and by changing some units in the device and having a switching section, it is possible to convert the electronic device into a three-phase, three-wire system.
It will also be possible to receive the wire system.

Among these, in the case of electronic devices that operate on three-phase systems, AC loads within the device, such as DC stabilizing power generators and cooling fans, generally operate on a 200VAC system;
If you make a mistake in selecting the switching unit that is responsible for switching the wiring within the device depending on whether it is a wire system or a 3-phase 4-wire system, it will receive a 3-phase 4A power source while it is set for a 3-phase 31IIA system.
This causes the inconvenience of destroying the AC load.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a power supply device that can prevent damage to an electronic device caused by a mismatch between the type of power source received and the wiring within the electronic device.

[Summary of the invention]

In order to achieve such an object, the present invention includes a synchronization section that queues units that involve changes in the power supply device depending on the type of power source received, and checks whether the combination matches one or more connection switching sections. The present invention is characterized in that the electronic device can be turned on only when the change unit and the connection of the switching section form a serial network.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

First, the apparatus of the present invention is mainly composed of the following three components. That is, 3-phase 3-wire power input section 1 or 3
They are a power input section 11 for phase four-wire system, an AC power on/off section 21, and a power-on control section 31. The input section 1 and the input section 11 are used interchangeably depending on the type of power source to be received.

Furthermore, among the above-mentioned components, 2 and 12 are input terminal sections that serve to receive the respective power sources in the electronic device, and 3 and 13 are 3-phase 3-wire power input sections 1 and 3-phase 4, respectively.
Output connectors 4 and 14 of the wire power input unit 11 are power source determination connectors that serve as keys for determining the type of power source, and 22 is an input connector of the AC power on/off unit 21. A cable from either the output connector 3 or 13 is connected thereto. Further, 23 is an output connector of the AC power on/off unit 21, which supplies AC power to the load, and 24 is a relay connector to which only the cable of either the power source discrimination connector 4 or 14 is connected. Part 25 is a switching plug part that enables switching of the AC power supplied to the load depending on the type of power source, and also serves as a power input part 1 for 3-phase 3-wire system or 3-phase 3-wire power input part for 4-wire system. This makes it possible to synchronize with the section 11.

26 is a relay connector that transmits the signals from the relay connector 24 and the switching connector 25 to the power-on control unit 31; 27 is an ON-OFF switch for AC power; and 28 is a switch depending on the type of power source to be received. The power supply control unit 31 operates regardless of the phase-to-phase voltage.
The stabilized auxiliary power supply units 29 and 30 for supplying the DC voltage E to the relay connector 26 via the relay plug unit 26 are switching adapters, one of which is selected and used according to the type of power source. It is connected to the plug part 25. These adapters 2
9 and 30 form a serial net with the power source identification connectors 4 and 14, respectively, when properly combined. In addition,
The plug 29 is of a three-phase, three-wire type.

Further, the same 30 is used for the three-phase four-wire system.

32 is a relay connector that receives the switching adapter 26; 33 is a Nant gate circuit that receives a synchronization signal with the power source discrimination connector 4 or the switching adapter 29 or 30; 34 is a power-on command switch; 35 is an inverter circuit; 36 receives the power-on command switch 34, the Nant gate circuit, and the output and turns ON-
This is an AND gate circuit that operates to issue an on command signal Sl to the FF switch 27.

In the above configuration, the 3-phase 4-wire input section 11 is now mounted on the power supply device, and the switching adapter 30 is connected to the switching plug section 25.
When the stabilized auxiliary power supply 28 is connected to a 3-phase 4A power source and receives a 3-phase 4A power source, the stabilized auxiliary power supply 28 is activated and supplies the DC voltage E to the power-on control unit 41. At this time, the input AI of the Nant gate circuit 33 is open, that is, high, the input A2 forms a serial net and becomes the ground potential, that is, low, and the output of the Nant gate circuit 33 becomes high, and the AND gate circuit 3
6. When the power-on command switch 34 is turned on, the input of the inverter circuit 35 becomes low, and the output S1 of the AND gate circuit 36 is output.
Normal single-phase power of U-N, V-N, and W-N is supplied from No. 3 to the load.

If you make a mistake in selection and connect the switching adapter 29 instead of the switching adapter 30, the input AI of the Nantes gate circuit 33
, A2 become high, and the output becomes low and is transmitted to the AND gate circuit 36.

Turn on the power-on command switch 34 and do not operate the ON-〇FF switch 27, which is output from the AND gate circuit 36.

Next, the 3-phase 3-wire input section 1 is mounted on the power supply device, and the 3-phase 3-wire input section 1 is
Normal switching adapter 2 when receiving phase 3-wire power source
9 is connected, and when the switching adapter 30 is connected by mistake, the same operation as described above is performed.

〔Effect of the invention〕

According to the power supply device of the present invention, by changing some of the units in the power supply device and changing the wiring of the switching section, it is possible to operate by receiving either a 3-phase 3-wire power source or a 3-phase 4-wire power source. It is possible to prevent damage to the electronic device even if the wiring at the switching section turns out to be an unexpected connection, and it is also easy to configure and inexpensive to detect incorrect operation and improve safety. The effect is that it can be secured.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the apparatus of the present invention. ■... Input section for 3-phase 3-wire system, 11... Input section for 3-phase 4-wire system, 4, 14... Discrimination plug section, 21... AC power on/off section, 25.・・Switching connection part,
27...On/off switch. 29.30...Switching adapter, 41...Power-on control unit, 33...Nant gate circuit, 34...Power-on instruction switch, 36...AND gate circuit.

Claims (1)

[Claims] (1) In a power supply device that receives different types of power and sends it to the load side via a switch, there is a discriminating plug unit that has a determination section that depends on the type of power that it receives, and a discriminator that has a determination section that depends on the type of power that it receives. a switching plug unit that switches the connection and forms a serial net with the discrimination plug unit; and a control means that monitors the connection of the serial net and turns on the switch only when a predetermined serial net is formed. A power supply device equipped with