JP2878151B2 - Parallel redundant power supply with online repair function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parallel redundant power supply having an online repair function.

[0002]

2. Description of the Related Art A conventional parallel redundant power supply having an online repair function is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-114921 (online repair system). ) And an OR diode at the output, and has a function of enabling disconnection and insertion of a failed power supply module even in a live line by manually disconnecting the switch from the input of the power supply module.

[0003]

In the above-described on-line repair method according to the prior art, when a power supply module fails and repair is required, an input must be manually disconnected by a maintenance person when the power supply module is inserted or removed. It was not possible to confirm that the power supply module was disconnected, and the power supply module was inserted or removed while input power was being applied. Could be turned off.

[0004]

According to a first aspect of the present invention, there is provided a power supply device having an online repair function for performing a parallel redundant operation of a plurality of power supply modules. It has an input line relay connected to each module and an output OR diode, and when a power supply module in parallel redundant operation is in an alarm state, an alarm signal issued by the power supply module itself is output to the input line. It has an online repair function including an online repair control unit that takes in the coil portion of the relay and shuts off the relay contact connected to the input line.

According to a second aspect of the power supply apparatus having an online repair function, the relay contact of the input line is interrupted.
It is not turned off, it is turned off when the input is applied, and when the relay contact of the input line is cut off, the LED is turned on and it can be visually confirmed that the input is cut off. It has an online repair function including an alarm circuit.

[0006]

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

FIG. 1 is a block diagram of an embodiment of a power supply device having an online repair function according to the present invention.

In this parallel redundant power supply, an input power supply 10 is input to the parallel redundant modules 3A to 3N via relay contact portions 1A to 1N connected to the input lines 2A to 2N.

The outputs of the parallel redundant modules 3A to 3N are connected to diodes 4A to 4A used as OR functions, respectively.
The cathodes of the OR diodes 4A to 4N which are connected to the anode of N and are used as their OR functions are connected to the output of this power supply device to prevent backflow from the output of the other parallel redundant module 3 during normal operation. . The alarm signals of the parallel redundant modules 3A to 3N are connected to relay coils 5A to 5N via alarm signal lines 6A to 6N which are low level when normal and alarm is high level. The relay coils 5A to 5N are parallel redundant modules. When 3A to 3N are normal, input relay contact 1A by energizing the coil
1N continue the ON state, and when an error occurs, the alarm signals 6A to 6N become high and the relay coils 5A to 5N
N turns off the relay contact portions 1A to 1N. When input voltages are applied to the parallel redundant modules 3A to 3N via the input monitor lines 8A to 8N on the input lines 2A to 2N of the parallel redundant modules, the respective LEDs (light emitting diodes) 9A to 9N are turned off. When the input power supply 10 is disconnected by the relay contacts 1A to 1N and the module input voltage is not applied, the LED 9A
To 9N are turned on, and input voltage monitor circuits 7A to 7N for displaying the input state and LEDs 9A to 9 for displaying the input state
N is connected.

[0010]

As described above, according to the present invention, when the power supply module is repaired, the supply of the input power only to the power supply module to be repaired is automatically stopped at the same time as the alarm, and the input to the power supply module is stopped. Since the power supply status can be checked, it is possible to prevent insertion and removal of the power supply module while input power is supplied,
Further, since the state of supply of the input power to the power supply module is displayed, it is possible to prevent another normal power supply module from being inserted or removed due to a mistake of a maintenance person. Therefore, there is an effect that the reliability and maintainability of the power supply system can be improved.

[Brief description of the drawings]

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

[Explanation of symbols]

 1A to 1N Relay contact 2A to 2N Input line 3A to 3N Parallel redundant module 4A to 4N Diode 5A to 5N Relay coil 6A to 6N Alarm signal line 7A to 7N Input voltage monitor circuit 8A to 8N Input monitor line 9A to 9N LED (light emitting) Tiode) 10 Input power supply

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G06F 11/00 350 G06F 1/30 H02M 3/28 H02J 1/00 H02J 9/06

Claims (2)

(57) [Claims] 1. A power supply apparatus having an online repair function of a power supply for performing a parallel redundant operation of a plurality of power supply modules, comprising: a relay for an input line connected to each of the power supply modules; and an output diode. When a power supply module in parallel redundant operation is in an alarm state, an on-line repair is performed in which an alarm signal issued by the power supply module itself is taken into a coil portion of a relay of the input line, and a relay contact connected to the input line is cut off. A parallel redundant power supply device having an online repair function, comprising a control unit. 2. A relay contact of the input line is cut off.
And yet not, when the input is applied to the off state,
L when the relay contact of the input line is interrupted
2. The parallel redundant power supply device having an online repair function according to claim 1, further comprising an alarm circuit capable of visually confirming that the ED is turned on and the input is cut off.