JPH04344118A - Power source connection control system - Google Patents

Abstract

PURPOSE:To cope with malfunctions of both a primary side and a secondary side of a power source module placed in each package by sensing a malfunction of a secondary side output of the module and cutting off the connection of the primary side. CONSTITUTION:Power source modules are placed in one or more packages mounted in the same unit and connected with a common primary power source. In an individual power source supply system for supplying the secondary side output of the module to a circuit in the package, a power source connection control system comprising means for monitoring the secondary side output of the module placed in the package and means (mechanical relay, a photo MOS relay, a phototransistor switch, etc.) for breaking the primary side power source of the module when the monitored result is abnormal, is constituted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply connection control system. In recent years, the amount of information handled by information devices has been increasing, and the impact of equipment failure on society is immeasurable.In particular, a failure in a power supply circuit not only makes it impossible to use the electronic equipment that is the load. Depending on the mode of failure, it may cause a failure in the electronic equipment that is the load, affecting other power supply circuits, and as a result, the entire system may fail. For this reason, early detection of equipment failure and appropriate measures have become important.

0002

[Prior Art] Conventionally, a package (hereinafter referred to as
Each PKG (PKG#1 to PKG#n) is equipped with a power supply module, such as a DC/DC converter or an AC/DC converter.
In the individual power supply system, which is equipped with a DC converter (1-1 to 1-n) and uses its secondary output (4-1 to 4-n) within the PKG, the power supply module (1-1 to 1
In order to prevent damage to the circuits within the PKG (5-1 to 5-n) due to a failure of the power supply module (5-1 to 5-n) and to prevent the fault from spreading to the primary power supply (7), the power supply module (1-1 to 1) is installed as shown in Figure 4. ─n)
A fuse or non-fuse breaker (hereinafter referred to as NFB) (8-1 to 6-n) is installed on the primary side (6-1 to 6-n).
8-n) was inserted outside the PKG. However, in the above method, the primary side input of the power supply module (6-
The fuse or NFB (8-1 to 8-n) will only operate if an excessive current flows through the fuse or NFB (8-1 to 8-n); on the other hand, once the fuse or NFB is blown, it will cause a failure PK.
G exchange alone will not restore the condition.

0003

[Problems to be Solved by the Invention] Therefore, in the case of a failure mode in which the primary side input current does not change significantly, such as an abnormality in the secondary side output voltage, the fuse Or if NFB is disconnected,
There was a problem in that it required replacing the fuse or reinserting the NFB, resulting in a lack of quick response.

SUMMARY OF THE INVENTION An object of the present invention is to detect an abnormality in the output of the secondary side and disconnect the primary side to deal with the abnormality on both the primary side and the secondary side.

[0005]

[Means for Solving the Problems] FIG. 1 is a diagram illustrating the principle of the present invention. Electric power supplied from the primary power supply 7 is input to the primary input 6 of the power supply module 1 via the cutoff means 2 . A certain range of voltage and current is outputted from the power supply module 1 to the secondary side output 4 via the output voltage/output current monitoring circuit 3, and is supplied to the PKG internal circuit 5. As shown in the example of FIG. 3, when the output voltage and output current are within the allowable value range, the output voltage and output current monitoring circuit 3
does not issue a command to shut off the shutoff means 2, and the shutoff means 2 is kept in a non-shutoff state.

[0006] When the power supply module fails, the secondary output 4
If the voltage drops or rises, the output voltage/output current deviates from the allowable value range, and the output voltage/output current monitoring circuit 3 issues a cut-off command to the cut-off means 2 and outputs a cut-off command to the power supply module. The power supply will be cut off.

[0007]

[Operation] In Fig. 1, the output voltage/output current monitoring circuit 3
Then, if an abnormality occurs in the secondary output 4 of the power supply module, that is, if the voltage of the secondary output 4 drops or increases, or if the current of the secondary output 4 drops or increases, the cutoff means Issue a command to cut off 2. Specifically, one terminal of the interrupting means 2 is set to earth (zero potential),
The interrupting operation inside the interrupting means 2 is started. Therefore, from the primary power supply 7 to the primary input 6 of the power supply module 1,
The power supply to is cut off.

As a result, even if the power supply module fails,
The effect may cause the circuit within the PKG to malfunction or cause damage to other PKGs.
The objective of the present invention, which is to prevent G from inducing a failure, can be achieved. Furthermore, even if the circuit 5 in the PKG fails and becomes short-circuited or open, the power supply to the power supply module is cut off by the operation of the output voltage/output current monitoring circuit 3, as in the case described above. . As mentioned above, a normal failure is either a failure of the power supply module itself or a failure of the load on the power supply module, in the above example, the circuit 5 in the PKG, but in special cases, there may be an abnormality in the connection to the power supply module, For example, wire breaks or short circuits,
If this occurs, the secondary side output 4 of the power supply module will naturally become abnormal, so the power supply to the power supply module will be cut off in the same way as in the case of a failure of the power supply module itself or a failure of the load of the power supply module. . When the above-mentioned abnormality is discovered, when the faulty PKG is replaced with a normal PKG, the normal PKG immediately enters the normal operating state because the shutting means 2 is in the non-blocking state.

[0009]

[Embodiment] An embodiment of the present invention is shown in FIG. In the figure, L1
〜L3 is a lamp, which corresponds to the circuit 5 in the PKG in FIG. 1, and RL1 to RL3 and rl1 to rl3 are the windings and contacts of a mechanical relay, respectively, and correspond to the interrupting means 2 in FIG. 1. .

Output voltage/output current monitoring circuit 3-1 to 3-
3, the characteristics of power supply module 1-1 are as shown in Figure 3.
The outputs of the control outputs 9-1 to 9-3 are kept open while the output voltages and output currents of the control outputs 9-1 to 9-3 are within a certain range. When the output voltage or output current deviates from a certain range, the outputs of the control outputs 9-1 to 9-3 become ground level (zero potential).

[0011] In normal operation, the output voltage and output current are naturally within a certain range, so the outputs 9-1 to 9-3 are in an open state, and no current flows to RL1 to RL3, and the rl
The contacts of 1 to rl3 are closed, and the power supply module 1
The primary side inputs 6-1 to 6-3 of -1 to 1-3 continue to be supplied with a predetermined voltage (for example, DC-48V) from the primary side power supply 7.

On the other hand, any circuit within the PKG, for example L
2, if an abnormality occurs and the current significantly increases or decreases, or if an abnormality occurs in the voltage of the output 4-2 of the power module 1-2 due to a failure of the power module 1-2, the control The power output 9-2 is connected to the ground, and the winding RL2 of the mechanical relay is connected to the power supply voltage (for example, DC-48
As a result of the application of V), a current flows, the contact rl2 of the mechanical relay is opened, and the primary side input 6-2 of the power supply module 1-2 is completely disconnected from the primary side power supply 7, so that it cannot be connected to other power supply modules. It does not affect the power supply or the primary power supply.

[0013] Furthermore, if only the failed PKG (PKG2) is replaced with a normal PKG, the failure state can be recovered without any other operations. In the above-described embodiment, the characteristics of the output voltage/output current monitoring circuit are such that, as shown in FIG. However, these tolerance values may be set to zero. That is, in many cases, a typical load does not cause a failure even if the applied voltage is lower than the normal value, and in this case, the low voltage tolerance may be set to zero. Furthermore, in the case of a load that normally operates in such a way that the current changes significantly, the minimum allowable current value may be set to zero. In these cases, the advantage is that the circuit is generally simplified.

[0014]

[Effect of the invention] As described above, when the secondary side output of the power supply module is abnormal, the electric circuit in the PKG connected to the output can be protected, and the cause of the output abnormality is found on the primary side of the power supply module. Even in this case, there is an effect that an adverse effect on the primary power supply and other PKGs commonly connected to the failed PKG can be prevented. Another advantage is that it is possible to recover from a failure simply by replacing the failed PKG without any other operations.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the present invention.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 shows the characteristics of the output voltage/output current monitoring circuit.

FIG. 4 shows a conventional configuration.

[Explanation of symbols]

1, 1-1, 1-2, 1-3, 1-n Power supply module 2 Cutting off means 3, 3-1, 3-2, 3-3 Output voltage/output current monitoring circuit 4, 4-1, 4 ─2, 4─3, 4─n Secondary side output of power supply module 5, 5─1, 5─2, 5─n PKG internal circuit 6, 6─
1, 6-2, 6-3, 6-n Primary side input of power supply module 7 Primary side power supply 8-1, 8-2, 8-n Fuse or non-fuse breaker (NFB) 9-1, 9- 2, 9-3 Control output PKG, PKG
#1, PKG #2, PKG #3 Package L1, L2, L3 Lamp

Claims (4)

[Claims] [Claim 1] A power supply module (1) is mounted for each of one or more packages (PKG) that are mounted in the same unit and connected to a common primary power supply, and the power supply module (1) In the individual power supply system that supplies power to the circuit (5) in the package from the secondary side output (4) of the power supply module (
1), and means (2) for cutting off the primary power source (7) of the power supply module (1) if the monitoring result is abnormal. A power connection control method featuring: 2. A power supply connection control system characterized in that a mechanical relay is used as the means (2) for cutting off the primary power supply (7) according to claim 1. 3. A power supply connection control system characterized in that a photomos relay is used as the means (2) for cutting off the primary power supply (7) according to claim 1. 4. A power supply connection control system characterized in that a transistor switch is used as the means (2) for cutting off the primary power supply (7) according to claim 1.