JPS62160037A - Source control system - 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] [Summary] In a power supply device that performs parallel redundant operation of co-power supply units,
When a power supply unit failure alarm signal is generated, an alarm is issued, and when it is detected that the power supply capacity is insufficient for the current consumption of the load device, control is performed to cut off all power to the load device. This improves redundancy performance.

[Industrial Field of Application] The present invention relates to a control method for a power supply for an electronic computer, and more particularly to a control method for a power supply device that connects a plurality of power supply units in parallel and performs redundant operation.

[Prior Art] Power supply devices for electronic computers, etc. are often configured by connecting the outputs of multiple power supply units in parallel, and in this case, the number of power supply units is one more than that required for the current capacity to supply to the load. Redundant operation is also being carried out.

For example, when the number of power supply units required to supply the maximum current consumption of a load device is nine, the outputs of ten power supply units are connected in parallel to perform redundant operation.

In parallel redundant operation, conventionally, when one power supply unit went into an alarm state, an alarm was issued, and when two power supply units went into an alarm state, all power to the device was cut off.

[Problems to be Solved by the Invention] The current of a load device such as an electronic computer varies depending on optional configurations, variations in the power consumption of elements such as LSIs used, and furthermore, depending on the operating state based on programming. When it comes to power consumption, even if one unit is redundant, in actual operation, two or more units are often redundant.

Therefore, even if two devices are in an alarm state, there is no need to turn off all power to the devices if the load devices have the ability to cover the power consumption.

In view of the above circumstances, the present invention aims to provide a new power supply control method with further improved redundancy performance.

[Means for Solving the Problems] FIG. 1 shows a block diagram of the principle of the power supply control system of the present invention.

Figure 1 fa) shows n power supply units 1, 2, -.

FIG. 3 is a diagram showing that the power supply unit 1 is performing parallel redundant operation and supplying power to a load device.

Each power supply unit) 1.2. -..., n is the power supply unit failure alarm signal 1 that is issued when the power supply unit fails.
, 2. −, n.

FIG. 1 (bl is a diagram showing the principle of the present invention. In the figure, 1 is a supply capacity excess detection means, which uses some method to detect whether the power supply capacity is sufficient for the current consumption of the load device. When it runs out, it detects this and issues an overcapacity warning signal.

When a power supply unit failure alarm signal is generated from any power supply unit, a visual or audible alarm is issued to the operator.

When a supply capacity excess alarm signal is generated, all power to the load equipment is cut off.

Therefore, no matter how many power supply units fail, the power will not be cut off until the supply capacity excess alarm signal is not issued.

The supply capacity excess detection means 1 detects that the supply capacity is insufficient by either of the following two methods.

(2) It is assumed that all power supply units are equipped with means for detecting that either a power supply unit failure alarm signal or an overcurrent alarm signal has been emitted, and that when this state is detected, the supply capacity has been exceeded.

■If each mold source unit has an overcurrent protection function that drops the output voltage when overloaded, it is equipped with a low voltage detection means that detects an abnormal drop in the load voltage. It is assumed that the supply capacity has been exceeded when a drop is detected.

[Function] With the above configuration, if the current consumption of the load device is less than the power supply capacity, no matter how many power supply units are in an alarm state, all power to the load device is not cut off, and the current consumption of the load device is reduced. When the power supply capacity is exceeded, all power to the load device is controlled to be cut off.

As a result, redundancy performance is improved, and system down time due to power failure can be significantly reduced compared to the conventional system.

[Example] The present invention will be explained in more detail with reference to an example shown in FIGS. 2 and 3.

FIG. 2 is a circuit diagram of a main part of the first embodiment of the present invention.

FIG. 2(a) is a diagram showing that the outputs of 0 power supply units are connected in parallel and supplied to a load device.

Each power supply unit has a power supply unit failure alarm signal and an overcurrent alarm signal.

FIG. 2(b) shows the main part of the circuit in the first embodiment.

In the figure, 11+, -, lln are OR gates,
Outputs an OR signal of the power supply unit failure alarm signal and overcurrent alarm signal of each power supply unit.

12 is an AND gate, and OR gates 11+, -1
It takes n output signals of 110 as input, and outputs the AND signal as a power cutoff signal.

13I, -1130 are launches, and launch respective power supply unit failure alarm signals.

14 +, --, 14n are light emitting diodes, which emit light when the respective latches 13+, -, 13n are "on".

When the light emitting diodes 14+, -, and 14n emit light, a light-receiving element (not shown) turns "on," and the signal is input to a microprocessor, etc., which issues an audible alarm such as a buzzer, and as a visual alarm, the unit number Indicates that the unit has failed.

That is, when a power supply unit failure alarm signal is generated from any of the power supply units, the light emitting diode corresponding to the power supply unit emits light to issue a warning to the operator,
Only when all the other power supply units issue overcurrent alarm signals, the AND gate 12 is opened and the power cutoff signal is turned "on" to cut off all power to the load devices.

FIG. 3 is a circuit diagram of a main part of a second embodiment of the present invention.

Each power supply unit in Figure 3) 1. 2. -.-1n has an overcurrent protection function that drops the output voltage when overload occurs.

13 Tsuta, ・-, 13n are the same as in Figure 2 (lunch,
141,...-114n are light emitting diodes, and the second
It has the same effect as shown in the figure.

16 is a low voltage detection circuit, which detects an abnormal drop in the load voltage.

The detection output signal of the low voltage detection circuit 16 directly serves as a power cutoff signal to cut off all power to the load device.

That is, an abnormal drop in the load voltage indicates that the supply capacity of the power supply is insufficient for the current consumption of the load device.

[Effects of the Invention] As explained above, according to the present invention, as long as the current consumption of the load device is lower than the power supply capacity, all power to the load device is not cut off no matter how many power supply units are in an alarm state. This control improves redundancy performance and greatly reduces system downtime due to power supply failures, which has an extremely large practical effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a circuit diagram of a main part of a first embodiment of the invention, and FIG. 3 is a circuit diagram of a main part of a second embodiment of the invention. In the drawing, 1 is a supply capacity excess detection means, 11+, -, lln are OR gates, 12 is an AND gate, 13+y-, 13n are launches, 141, -1140 are light emitting diodes, 16 is a low voltage detection circuit, Each is shown below. Power supply unit failure alarm signal n Alarm (b
) Principle block diagram of the present invention

Claims (3)

[Claims] (1) In a power supply device that performs redundant operation by connecting the outputs of multiple power supply units in parallel, the supply capacity is to detect when the current consumption of the load device exceeds the supply capacity of the power supply and to issue a supply capacity excess alarm signal. Excess detection means is provided to issue a visible or audible alarm when a power supply unit failure alarm signal is generated, and to cut off all power to the load device when the supply capacity detection means issues an excess supply capacity alarm signal. A power supply control method characterized by the following configuration. (2) Claims characterized in that the supply capacity excess detection means in the above description is means for detecting that all power supply units have issued either a power supply unit failure signal or an overcurrent alarm signal. The power supply control method described in paragraph 1. (3) Claim 1, characterized in that the supply capacity detection means in the above description is a low voltage detection means that detects that the load voltage of the power supply device has abnormally decreased.
Power control method described in section.