JP3405276B2 - 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 power supply device for supplying a voltage to an exchange.

[0002]

2. Description of the Related Art Conventionally, this kind of power supply device detects and responds to a disconnection failure of a power supply on the exchange side when a failure occurs in the power supply device.

[0003]

However, in this conventional power supply device, it is not possible to detect that the supply voltage from the power supply device has dropped, and the input power supply is not switched, so that malfunction of the exchange may occur. There is a problem of connection.

An object of the present invention is to provide a power supply device capable of preventing malfunction of the exchange.

[0005]

In order to solve the above problems, the invention according to claim 1 provides a first power supply device, a second power supply device, and the first and second power supply devices. A voltage measuring circuit for measuring the first and second supply voltages of the power supply device to generate the first and second measured supply voltages, and the first and second measured supply voltages from the voltage measuring circuit. The measurement information collecting circuit that is stored in memory and the first and second measurement supply voltages of the measurement information collecting circuit and a predetermined reference voltage, and one of the first and second measurement supply voltages is a predetermined reference voltage. An input power supply switching control circuit which generates fault information when the voltage is lower than the voltage, and one of the first and second measured supply voltages higher than the reference voltage when the fault information is received from the input power source switching control circuit as the supply voltage. An input power switching circuit that selectively supplies the switch And having a commercial power source for supplying electric power is connected to the voltage measurement circuit and the measurement information collecting circuit and the input power source switching control circuit and an input power supply switching circuit.

According to a second aspect of the present invention, in the first aspect of the invention, the input power supply switching circuit has a voltage correction circuit for correcting the supply voltage supplied to the exchange to a voltage within a predetermined range. To do.

According to a third aspect of the invention, in the invention according to one of the first and second aspects, the noise of the supply voltage from the input power source switching circuit is absorbed between the input power source switching circuit and the exchange. It has a filter circuit for

According to a fourth aspect of the present invention, the first power supply device, the second power supply device, and the first and second supply voltages of the first and second power supply devices are measured. First
And a voltage measuring circuit for generating a second measuring supply voltage,
A measurement information collecting circuit that temporarily stores the first and second measurement supply voltages from the voltage measuring circuit, and the first and second measurement supply voltages of the measurement information collecting circuit and a predetermined reference voltage. And an input power supply switching control circuit that generates fault information when one of the first and second measured supply voltages is lower than a predetermined reference voltage, and a reference voltage when the fault information is received from the input power supply switching control circuit. An input power supply switching circuit that selectively supplies one of the high first and second measurement supply voltages as a supply voltage to the exchange; a voltage measurement circuit, a measurement information collecting circuit, an input power supply switching control circuit, and an input power supply switching circuit. Connected to the input power supply switching circuit and a commercial power supply connected to the input power supply switching circuit to supply voltage when the first and second supply voltages from the first and second power supply devices become lower than the reference voltage. And a battery for supplying an input power supply switching circuit when the received voltage from the battery and supplying the exchange the voltage as a supply voltage.

According to a fifth aspect of the invention, in the invention according to the fourth aspect, the input power supply switching circuit has a voltage correction circuit for correcting the supply voltage supplied to the exchange to a voltage within a predetermined range. To do.

According to a sixth aspect of the present invention, in the invention according to one of the fourth and fifth aspects, the noise of the supply voltage from the input power source switching circuit is absorbed between the input power source switching circuit and the exchange. It has a filter circuit for

According to a seventh aspect of the present invention, the first power supply device, the second power supply device, and the first and second supply voltages of the first and second power supply devices are measured. First
And a voltage measuring circuit for generating a second measuring supply voltage,
A measurement information collecting circuit that temporarily stores the first and second measurement supply voltages from the voltage measuring circuit, and the first and second measurement supply voltages of the measurement information collecting circuit and a predetermined reference voltage. And an input power supply switching control circuit that generates fault information when one of the first and second measured supply voltages is lower than a predetermined reference voltage, and a reference voltage when the fault information is received from the input power supply switching control circuit. An input power supply switching circuit that selectively supplies one of the high first and second measurement supply voltages as a supply voltage to the exchange; a voltage measurement circuit, a measurement information collecting circuit, an input power supply switching control circuit, and an input power supply switching circuit. Is connected to the commercial power source for supplying electric power, and is connected to the input power source switching circuit and supplied from the first and second power supply devices when the first and second supply voltages become lower than the reference voltage. And means for receiving an input power supply switching circuit voltage, input power switching circuit and supplying a voltage from the power source device of another exchange to the exchange as the supply voltage.

According to the invention described in claim 8, in the invention described in claim 7, the input power supply switching circuit has a voltage correction circuit for correcting the supply voltage supplied to the exchange to a voltage in a predetermined range. To do.

According to a ninth aspect of the present invention, in the invention according to one of the seventh and eighth aspects, the noise of the supply voltage from the input power source switching circuit is absorbed between the input power source switching circuit and the exchange. It has a filter circuit for

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a power supply device according to a first embodiment of the present invention comprises a first power supply device 1 and a second power supply device.
The power supply device 2, the voltage measuring circuit 3, the measurement information collecting circuit 4, the input power source switching control circuit 5, the input power source switching circuit 6, and the commercial power source 7.

The voltage measuring circuit 3 includes the first power supply device 1
Also, it is connected to the second power supply device 2 via terminal plates 8 and 9. The measurement information collecting circuit 4 is the voltage measuring circuit 3
It is connected to the. The input power source switching control circuit 5 is connected to the measurement information collecting circuit 4. Input power switching circuit 6
Is a first power supply device 1 and a second power supply device 2
To the input power source switching control circuit 5 via the terminal plates 8 and 9. Further, the input power source switching circuit 6 is connected to the exchange 11 via the filter circuit 10. The commercial power source 7 is connected to the voltage measuring circuit 3, the measurement information collecting circuit 4, the input power source switching control circuit 5, and the input power source switching circuit 6.

The first and second power supply devices 1 and 2 are
Generating first and second supply voltages. Voltage measuring circuit 3
For measuring the first and second supply voltages of the first and second power supply devices 1, 2 to generate first and second measured supply voltages. The measurement information collecting circuit 4 is the voltage measuring circuit 3
Temporarily store the first and second measured supply voltages from. The input power supply switching control circuit 5 compares the first and second measurement supply voltages of the measurement information collecting circuit 4 with a predetermined reference voltage, and one of the first and second measurement supply voltages is higher than the predetermined reference voltage. Generate fault information when low.

The input power supply switching circuit 6 outputs the first and second measured supply voltages higher than the reference voltage when receiving the fault information from the input power supply switching control circuit 5, and outputs the first and second power supplies. One of the supply devices 1, 2 is selectively connected to the exchange 11 to selectively supply one of the first and second supply voltages to the exchange 11. The input power supply switching circuit 6 has a voltage correction circuit that corrects the supply voltage supplied to the exchange 11 to a voltage within a predetermined range. The filter circuit 10 absorbs the noise of the supply voltage from the input power supply switching circuit 6 and supplies a stable voltage to the exchange 11.

The commercial power source 7 supplies power to the voltage measuring circuit 3, the measurement information collecting circuit 4, the input power source switching control circuit 5 and the input power source switching circuit 6. Therefore, the voltage measuring circuit 3
Since the measurement information collecting circuit 4, the input power source switching control circuit 5, and the input power source switching circuit 6 are operated by the electric power from the commercial power source 7 instead of the electric power from the first and second power supply devices 2, And even if a failure occurs in the second power supply device 2, it operates normally.

Next, the operation of the power supply device shown in FIG. 1 will be described in detail with reference to FIGS. 1 and 2. As shown in FIG. 2, in step S1, the voltage measurement circuit 3 determines the first and second
And measuring the first and second supply voltages of the power supply devices 1, 2 to generate first and second measured supply voltages.

Next, in step S2, the measurement information collecting circuit 4 temporarily stores the first and second measurement supply voltages V1 and V2 from the voltage measuring circuit 3. Next, in step S3, the input power supply switching control circuit 5 determines whether or not V1 ≧ Vr and V2 ≧ Vr, where Vr is a predetermined reference voltage. When V1 ≧ Vr and V2 ≧ Vr are not satisfied in step S3, the input power supply switching control circuit 5 determines in step S4 whether V1 ≧ Vr and V2 <Vr.

In step S4, V1 ≧ Vr and V
When 2 <Vr is not satisfied, the input power supply switching control circuit 5 determines in step S5 whether V1 <Vr and V2 ≧ Vr. When V1 <Vr and V2 ≧ Vr are not satisfied in step S5, the input power supply switching control circuit 5 generates failure information and supplies it to the input power supply switching circuit 6, and then ends the operation.

In step S3, V1 ≧ Vr and V
When 2 ≧ Vr, the input power supply switching circuit 6 does not perform the switching operation of the connection between the first and second power supply devices 1 and 2 and the exchange 11 in step S7, and the current condition is held and the process returns to step S1. When V1 ≧ Vr and V2 <Vr in step S4, the input power supply switching control circuit 5 generates failure information in step S8 and supplies it to the input power supply switching circuit 6 before proceeding to step S9.

In step S9, the input power switching circuit 6
Determines whether the first power supply device 1 is connected to the exchange 11. When the first power supply device 1 is not connected to the exchange 11 in step S9, the input power supply switching circuit 6 performs a switching operation to connect the first power supply device 1 to the exchange 11 in step S10, Return to step S1.

When the first power supply device 1 is connected to the exchange 11 in step S9, step S1
In 1, the input power switching circuit 6 holds the current state without performing the switching operation of the connection between the first and second power supply devices 1 and 2 and the exchange 11, and returns to step S1.

When V1 <Vr and V2 ≧ Vr are satisfied in the input power supply switching control circuit 5 in step S5, the input power supply switching control circuit 5 generates fault information in step S12 and applies it to the input power supply switching circuit 6, and then in step S12. S
Go to 13. In step S13, the input power supply switching circuit 6 determines whether or not the second power supply device 2 is connected to the exchange 11. When the second power supply device 2 is not connected to the exchange 11 in step S13,
In step S14, the input power supply switching circuit 6 performs a switching operation to connect the second power supply device 2 to the exchange 11, and then returns to step S1.

When the second power supply device 2 is connected to the exchange 11 in step S13, step S13
In 15, the input power supply switching circuit 6 holds the current state without performing the switching operation of the connection between the first and second power supply devices 1 and 2 and the exchange 11, and returns to step S1.

Next, a second embodiment of the present invention will be described in detail with reference to the drawings. In the second embodiment of the present invention, the same components as those of the first embodiment of the present invention are designated by the same reference numerals.

As shown in FIG. 3, the power supply device according to the second embodiment of the present invention is connected to the input power supply switching circuit 6 in the power supply device according to the first embodiment of the present invention. A storage battery 12 is added, and the input power source switching circuit 6 receives the voltage from the power source device 13 of another exchange.

That is, the power supply device according to the second embodiment of the present invention is the first power supply device 1, the second power supply device 2, the voltage measuring circuit 3, the measurement information collecting circuit 4, and the input power source switching. Control circuit 5, input power source switching circuit 6, and commercial power source 7
And a storage battery 12, and the input power supply switching circuit 6 receives a voltage from a power supply device 13 of another exchange.

The storage battery 12 is normally charged by the input power switching circuit 6. The input power supply switching circuit 6 connects the storage battery 12 to the exchange 11 and supplies the voltage of the storage battery 12 to the exchange 11 as the supply voltage when the first and second power supply devices 1 and 2 have a low voltage. .

The input power supply switching circuit 6 connects the power supply device 13 of another exchange to the exchange 11 when the first and second power supply devices 1 and 2 and the storage battery 12 have a low voltage. The voltage of the power supply device 13 of the exchange is supplied to the exchange 11 as the supply voltage.

The input power supply switching circuit 6 connects the power supply device 13 of another exchange to the exchange 11 when the first and second power supply devices 1 and 2 have a low voltage. The exchange 1 using the voltage of the power supply device 13 as the supply voltage
1 and the input power supply switching circuit 6 connects the storage battery 12 to the exchange 11 when the first and second power supply devices 1 and 2 and the power supply device 13 of another exchange have a low voltage. The voltage of the storage battery 12 may be supplied to the exchange 11 as the supply voltage.

The input power supply switching circuit 6 may supply a voltage to the power supply device 13 of another exchange.

[0035]

According to the present invention, the switch has a predetermined supply voltage even when two power supply devices are provided and one of the power supply devices fails and the voltage of the power supply device drops. Therefore, malfunction of the exchange can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing a power supply device as a first embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the power supply device of FIG.

FIG. 3 is a block diagram showing a power supply device according to a second embodiment of the present invention.

[Explanation of symbols]

1 First power supply device 2 First power supply device 3 Voltage measurement circuit 4 Measurement information collection circuit 5 Input power switching control circuit 6 Input power switching circuit 7 Commercial power supply 8, 9 terminal board 10 Filter circuit 11 exchanges 12 storage battery 13 Power supply for exchange

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G05F 1/00 G05F 1/10 H02J 1/00 H04M 3/22 H04Q 1/28

Claims (9)

(57) [Claims] 1. A first power supply device, a second power supply device, and first and second supply voltages of the first and second power supply devices are measured to measure the first and second power supply devices. A voltage measuring circuit for generating a measurement supply voltage; a measurement information collecting circuit for temporarily storing the first and second measurement supply voltages from the voltage measuring circuit; and a first and a first measurement information collecting circuit for the measurement information collecting circuit. An input power supply switching control circuit for comparing the measured supply voltage of No. 2 with a predetermined reference voltage and generating fault information when one of the first and second measured supply voltages is lower than the predetermined reference voltage; An input power supply switching circuit that selectively supplies one of the first and second measurement supply voltages higher than the reference voltage as a supply voltage to the exchange when receiving the fault information from the switching control circuit; Circuit and the measurement information collecting circuit And a commercial power supply connected to the input power supply switching control circuit and the input power supply switching circuit to supply electric power. 2. The power supply device according to claim 1, wherein the input power supply switching circuit includes a voltage correction circuit that corrects the supply voltage supplied to the exchange to a voltage within a predetermined range. 3. The filter circuit according to claim 1, further comprising a filter circuit connected between the input power source switching circuit and the exchange to absorb noise of the supply voltage from the input power source switching circuit. Power supply. 4. A first power supply device, a second power supply device, and first and second supply voltages of the first and second power supply devices are measured to measure the first and second power supply devices. A voltage measuring circuit for generating a measurement supply voltage; a measurement information collecting circuit for temporarily storing the first and second measurement supply voltages from the voltage measuring circuit; and a first and a first measurement information collecting circuit for the measurement information collecting circuit. An input power supply switching control circuit for comparing the measured supply voltage of No. 2 with a predetermined reference voltage and generating fault information when one of the first and second measured supply voltages is lower than the predetermined reference voltage; An input power supply switching circuit that selectively supplies one of the first and second measurement supply voltages higher than the reference voltage as a supply voltage to the exchange when receiving the fault information from the switching control circuit; Circuit and the measurement information collecting circuit And a commercial power supply connected to the input power supply switching control circuit and the input power supply switching circuit to supply electric power, and a first power supply device connected to the input power supply switching circuit to the first and second power supply devices. A storage battery that supplies a voltage to the input power supply switching circuit when the supply voltage becomes lower than the reference voltage, and the input power supply switching circuit uses the voltage as the supply voltage when receiving the voltage from the storage battery. A power supply device characterized by being supplied to an exchange. 5. The power supply device according to claim 4, wherein the input power supply switching circuit includes a voltage correction circuit that corrects the supply voltage supplied to the exchange to a voltage in a predetermined range. 6. The filter circuit according to claim 4, further comprising a filter circuit connected between the input power source switching circuit and the exchange to absorb noise of the supply voltage from the input power source switching circuit. Power supply. 7. A first power supply device, a second power supply device, and first and second supply voltages of the first and second power supply devices are measured to measure the first and second power supply devices. A voltage measuring circuit for generating a measurement supply voltage; a measurement information collecting circuit for temporarily storing the first and second measurement supply voltages from the voltage measuring circuit; and a first and a first measurement information collecting circuit for the measurement information collecting circuit. An input power supply switching control circuit for comparing the measured supply voltage of No. 2 with a predetermined reference voltage and generating fault information when one of the first and second measured supply voltages is lower than the predetermined reference voltage; An input power supply switching circuit that selectively supplies one of the first and second measurement supply voltages higher than the reference voltage as a supply voltage to the exchange when receiving the fault information from the switching control circuit; Circuit and the measurement information collecting circuit And a commercial power supply connected to the input power supply switching control circuit and the input power supply switching circuit to supply electric power, and a first power supply device connected to the input power supply switching circuit to the first and second power supply devices. The input power supply switching circuit receives a voltage from a power supply device of another exchange when the supply voltage becomes lower than the reference voltage, the input power supply switching circuit is the power supply device of the other exchange. A power supply device, characterized in that a voltage is supplied to the exchange as the supply voltage. 8. The power supply device according to claim 7, wherein the input power supply switching circuit includes a voltage correction circuit that corrects the supply voltage supplied to the exchange to a voltage within a predetermined range. 9. The filter circuit according to claim 7, further comprising a filter circuit connected between the input power source switching circuit and the exchange to absorb noise of the supply voltage from the input power source switching circuit. Power supply.