JP2923903B2 - Prevention of erroneous mounting of heterogeneous power supply conversion package of distributed power supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing erroneous mounting of a heterogeneous power conversion package in a distributed power supply, and more particularly to a method of preventing erroneous mounting of a heterogeneous power conversion package in a distributed power supply in which a plurality of power conversion packages are mounted on a backboard. About.

[0002]

2. Description of the Related Art Conventionally, in this type of package mounting error prevention method, each package to be mounted is provided with a unique terminal in a physical structure for each type of package, and a back board on which the package is mounted is provided with a specific terminal. Generally, a mechanical system that allows the package to be mounted only when the terminal package is mounted has been used.

Also, a series circuit passing through all packages is formed only on a back board in which each package is inserted into a correct connector, and an electric circuit for detecting erroneous insertion of a package depending on whether a series circuit is formed or not. (See, for example, JP-A-57-74000 and JP-A-58-164299).

Further, there is also an optical system in which erroneous insertion of a package is detected by using a light emitting element or the like (see, for example, JP-A-63-58502).

[0005]

In the above-described conventional package mis-mounting detection method, in the case of a mechanical method, each package and the back board take a physically different shape, and therefore, depending on the type of the package. There is a problem that it is necessary to create a backboard, which increases costs.

Further, in the case of the electric system, since only erroneous insertion of a package is detected depending on whether or not a series circuit is formed, whether a package suitable for an input power supply voltage is mounted in the first place. There was a problem that it could not be detected.

Further, in the case of the optical system, when an obstacle such as a wire or a cable is interposed, there is a problem that even if the correct package is mounted, it may be detected as erroneous mounting. .

In view of the above, it is an object of the present invention to make it possible to mount different types of power supply conversion packages on the same backboard and to determine whether the correct power supply conversion package is mounted according to the input power supply voltage. An object of the present invention is to provide a method for preventing erroneous mounting of a heterogeneous power supply conversion package of a distributed power supply device, which detects a failure in the power supply conversion package.

[0009]

SUMMARY OF THE INVENTION According to the present invention, there is provided a distributed power supply device having a different power supply conversion package, which is provided with a plurality of power supply conversion packages mounted on a back board. A plurality of types of power conversion packages having different short-circuit positions between terminals according to the power supply voltage, a power switch for interrupting the supply of input power voltage to the power conversion package, and a terminal switching signal corresponding to the input power voltage A power supply voltage detection circuit, a terminal switching circuit that switches a terminal according to the terminal switching signal and outputs a loop signal, and a power supply switch that is turned on based on the loop signal that has passed through the power supply conversion package to perform the power supply conversion. A switch control circuit for supplying an input power supply voltage to the package.

[0010]

According to the method for preventing erroneous mounting of different types of power supply conversion packages of the distributed power supply device of the present invention, the short-circuit positions between terminals are made different according to the power supply voltage to be input to a plurality of types of power supply conversion packages. The voltage detection circuit outputs a terminal switching signal according to the input power supply voltage, the terminal switching circuit switches terminals according to the terminal switching signal and outputs a loop signal, and the switch control circuit outputs a loop signal passing through the power conversion package. Then, the power supply switch is turned on to supply the input power supply voltage to the power supply conversion package.

[0011]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a system for preventing erroneous mounting of a heterogeneous power supply conversion package of a distributed power supply according to an embodiment of the present invention. The distributed power supply device to which the heterogeneous power supply conversion package erroneous mounting prevention method of the present embodiment is applied,
The backboard 1, an erroneous mounting detection package 2, and a plurality (four in the figure) of power conversion packages 31 to 34 constitute the main part.

The back board 1 includes an 8-pin connector socket for mounting the erroneous mounting detection package 2 and four 8-pin connector sockets for mounting the four power conversion packages 31 to 34. .

The erroneous mounting detection package 2 includes a power supply switch 21 for interrupting the supply of the input power supply voltage to each of the power supply conversion packages 31 to 34, a power supply voltage detection circuit 22 for outputting a terminal switching signal corresponding to the input power supply voltage. A terminal switching circuit 23 that switches a terminal according to a terminal switching signal and outputs a loop signal, and a switch control circuit 24 that turns on the power switch 21 based on the loop signal that has passed through the power conversion packages 31 to 34. ing.

The power supply conversion packages 31 to 34 are packages for converting an input power supply voltage into an output power supply voltage. The input power source is a direct current (AC) power source or an alternating current (D
C) Any power supply may be used. Here, it is assumed that the power conversion packages 31, 32, and 34 are of the same type, and the power conversion package 33 is of a different type.
Therefore, the short-circuited terminal positions of the power supply conversion packages 31, 32 and 34 and the power supply conversion package 33 are different.

FIG. 2 is a perspective view of an essential part illustrating a connection mode when the power supply conversion packages 31 to 34 are mounted on the back board 2.

FIG. 3 is a block diagram showing an example of the power supply voltage detecting circuit 22 and the terminal switching circuit 23. The power supply voltage detection circuit 22 includes a DC conversion unit 220 and three voltage comparison units 221 to 223. Further, the terminal switching circuit 23 includes three relays 231 to 233.

FIG. 4 is a circuit diagram showing an example of the voltage comparison units 221 to 223. The power supply comparing units 221 to 223
Is composed of a Zener diode ZD for generating a reference voltage, a variable resistor VR for setting a detection voltage, an NPN transistor T1 for detecting voltage, an NPN transistor T2 for switching, and resistors R1 and R2. I have.

Next, the operation of the thus-configured distributed power supply device of the distributed power supply device according to the system for preventing erroneous mounting of different power supply conversion packages will be described.

The input power supply voltage from the office is input to the erroneous mounting detection package 2 through the backboard 1 and applied to the power switch 21 and the power supply voltage detection circuit 22.

In the power supply voltage detecting circuit 22, the DC converter 2
The AC input power supply voltage is converted into a DC power supply voltage by 20 and the DC input power supply voltage is input to the voltage comparison units 221 to 223 without being converted.

In the voltage comparators 221 to 223, the reference voltage generated in the Zener diode ZD and the detection voltage generated in the variable resistor VR are compared by the NPN transistor T1, and the base-emitter voltage of the NPN transistor T1 is determined. When the voltage exceeds the voltage, the NPN transistor T2
Turns on, and the input power supply voltage is output. Voltage comparison unit 22
The setting values of the variable resistors VR of 1 to 223 are different from each other, and an output voltage is obtained in any one of the voltage comparing units. This output voltage is input to the terminal switching circuit 23 as a terminal switching signal.

In the terminal switching circuit 23, the relay to which the terminal switching signal is applied is turned on, and a predetermined voltage or a ground voltage is output as a loop signal.

The loop signal output from the terminal switching circuit 23 is output from the back board 1 and the power conversion circuit if the power conversion packages 31 to 34 mounted on the back board 1 are all power conversion packages suitable for the input power supply voltage. After passing through the packages 31 to 34, it is input to the switch control circuit 24 of the erroneous mounting detection package 2, and the switch control circuit 24 turns on the power switch 21 in response to the loop signal. Thus, the input power supply voltage is supplied to each of the power conversion packages 31 to 34 via the power switch 21 and the back board 1.

However, in this example, the power supply conversion package 3
Since the power conversion package 3 is not compatible with the input power supply voltage, the loop signal is cut off in the power conversion package 33 and is not input to the switch control circuit 24, and the power switch 21 does not turn on. As a result, the input power supply voltage is not supplied to the power supply conversion packages 31 to 34, and a failure of the power supply conversion package 33 due to erroneous mounting is prevented.

In the above embodiment, the case where four power supply conversion packages 31 to 34 are mounted on the back board 1 and the power supply voltage detection circuit 22 detects three types of input power supply voltages has been described as an example. It goes without saying that the number of power supply conversion packages mounted on the board 1 and the type of input power supply voltage detected by the power supply voltage detection circuit 22 are not limited to these numbers.

Further, the voltage comparison units 221 to 223 of the power supply conversion packages 31 to 34 are illustrated as having a circuit as shown in FIG. 4, but this circuit is merely an example, and the voltage comparison units 221 to 223 Needless to say, the circuit is not limited to the circuit shown in FIG.

[0028]

As described above, according to the present invention, a plurality of types of power supply conversion packages having different short-circuit positions between terminals according to a power supply voltage to be input are mounted on a back board, and a power switch is provided. , Power supply voltage detection circuit,
By using the terminal switching circuit and switch control circuit to detect erroneous mounting of a power conversion package that does not match the input power supply voltage, it is possible to mount different types of power conversion packages on the same backboard, There is an effect that it is possible to detect whether or not a correct power supply conversion package is mounted according to the input power supply voltage, thereby preventing a failure of the power supply conversion package.

Also, a power switch, a power voltage detection circuit,
Since the terminal switching circuit and the switch control circuit are integrated in the erroneous mounting detection package, the erroneous mounting detection package can be mounted on the back board in the same manner as the power conversion package.

Further, by providing a DC converter in the power supply voltage detection circuit, there is an effect that it is possible to provide a versatile erroneous mounting detection package that allows an input power supply voltage from an AC power supply.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a system for preventing erroneous mounting of a heterogeneous power conversion package of a distributed power supply according to an embodiment of the present invention.

FIG. 2 is a perspective view of an essential part illustrating a connection mode when the power conversion package in FIG. 1 is mounted on a backboard.

FIG. 3 is a block diagram illustrating an example of a power supply voltage detection circuit and a terminal switching circuit in FIG. 1;

FIG. 4 is a circuit diagram illustrating an example of a voltage comparison unit in FIG. 3;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 back board 2 erroneous mounting detection package 21 power switch 22 power supply voltage detection circuit 23 terminal switching circuit 24 switch control circuit 31 to 34 power conversion package 220 DC conversion unit 221 to 223 voltage comparison unit 231 to 233 relay R1, R2 resistance T1, T2 NPN transistor VR Variable resistor ZD Zener diode

Claims (4)

(57) [Claims] 1. A distributed power supply device in which a plurality of power supply conversion packages are mounted on a backboard, wherein a plurality of types of power supply conversion packages having different short-circuit positions between terminals according to a power supply voltage to be input; A power switch for intermittently supplying a power supply voltage to the power conversion package; a power supply voltage detection circuit for outputting a terminal switching signal according to an input power supply voltage; and a terminal switching according to the terminal switching signal to output a loop signal And a switch control circuit for turning on the power switch based on a loop signal passing through the power conversion package and supplying an input power voltage to the power conversion package. A method for preventing incorrect mounting of different power supply conversion packages of equipment. 2. The distributed power supply device according to claim 1, wherein the power switch, the power supply voltage detection circuit, the terminal switching circuit, and the switch control circuit are integrated in an erroneous mounting detection package and mounted on the back board. Different power supply conversion package erroneous mounting prevention method. 3. The heterogeneous power supply conversion package of a distributed power supply device according to claim 1, wherein said power supply voltage detection circuit includes a DC converter, and is adapted to accept an input power supply voltage from an AC power supply. Incorrect mounting prevention method. 4. The method according to claim 1, wherein the loop signal is a ground voltage.