Locking power supplies

1. A method for managing one or more power supplies, the method comprising:

connecting n number of necessary power supplies and k number of redundant power supplies to one or more electronic machine in parallel, each power supply providing electricity to the one or more electronic machine, wherein n is a positive integer number of power supplies being necessary to operate the electronic machine, and k is another positive integer number, wherein a failure of the k or less number of power supplies will still keep the electronic machine operating;

interlocking the power supplies, the interlocking including: connecting the n and k power supplies together so that each power supply affects each other;

determining whether the power supplies are failed;

automatically locking one or more of the power supplies to the one or more electronic machine if the one or more of the power supplies are not failed, the locking including: using a latch device, attached to each power supply, which selectively moves between a lock position and a release position based on the determination, the locking preventing the one or more of the power supplies from disconnecting from the one or more electronic machine when the one or more of the power supplies are not failed, wherein a normally operating power supply releases the latch device of another power supply; and

automatically releasing the one or more of the power supplies from the one or more electronic machine if the one or more of the power supplies are failed, the releasing including moving the latch device to the release position.

2. The method according to claim 1 , wherein the determining includes:

measuring electric powers, electric voltages and electric currents provided from the power supplies.

3. The method according to claim 1 , wherein the releasing includes:

disconnecting the one or more failed power supplies from the one or more electronic machine.

4. The method according to claim 1 , wherein the locking and the releasing include:

manually operating the latch device by using a safety key.

5. The method according to claim 1 , wherein the interlocking includes:

disconnecting an unfailed power supply from the one or more electronic machine if n+1 or more number of power supplies are not failed.

6. The method according to claim 1 , further comprising:

automatically locking the one or more of the power supplies from the one or more electronic machine if the one or more of the power supplies are failed; and

automatically releasing the one or more of the power supplies from the one or more electronic machine if the one or more of the power supplies are not failed.

7. The method according to claim 6 , wherein the determining includes:

providing electricity to a latch device of one of the power supplies from another of the power supplies;

determining whether the another power supply is failed;

locking the one power supply if the another power supply is failed; and

releasing the one power supply if the another power supply is not failed.

8. The method according to claim 1 further comprising:

providing an electric circuit which is connected to the power supplies in parallel,

wherein the electric circuit performs:

for each power supply, concurrently comparing an electric power measurement against pre-determined lower and higher electric power thresholds, comparing an electric voltage measurement against pre-determined lower and higher electric voltage thresholds, or comparing an electric current measurement of electricity provided from each power supply against pre-determined lower and higher electric current thresholds; and

determining, based on the comparison, a number of power supplies that operates

normally, the normal operation of a power supply includes: generating electricity whose electric power measurement, electric voltage measurement or electric current measurement is between the respective lower and higher pre-determined electric power thresholds, lower and higher electric voltage thresholds or lower and higher electric current thresholds;

controlling, based on the determination, an operation of each power supply.

9. The method according to claim 8 , wherein the controlling includes:

determining whether n number or more than n number of power supplies operate normally; and

releasing all latch devices of all the power supplies if the n number or more than n number of power supplies normally operate.

10. The method according to claim 8 , wherein the controlling includes:

determining which power supply does not operate normally and which power supply operates normally;

locking latch devices of power supplies which operate normally.

11. The method according to claim 1 , wherein the locking and the releasing include: manually operating the latch device by using a safety key.

12. An apparatus for managing one or more power supplies, the apparatus comprising:

n number of necessary power supplies and k number of redundant power supplies that are connected in parallel to one or more electronic machine and provide electricity to the one or more electronic machine, wherein n is a positive integer number of power supplies being necessary to operate the electronic machine, and k is another positive integer number, wherein failures of the k or less number of power supplies will still keep the electronic machine operating, said parallel connected n and k power supplies being interlocked and connected together so that each power supply affects each other;

sensors, each attached to a corresponding power supply, determining whether the corresponding power supplies are failed;

latch devices, each attached to a corresponding power supply, automatically locking one or more of the power supplies to the one or more electronic machine if the one or more of the power supplies are not failed, the locking a power supply including: using a corresponding latch device, of the power supply, which selectively moves between a lock position and a release position based on the determination, the locking preventing the one or more of the power supplies from disconnecting from the one or more electronic machine, wherein a normally operating power supply releases the latch device of another power supply; and

the latch devices automatically releasing the one or more of the power supplies from the one or more electronic machine if the one or more of the power supplies are failed, the releasing including moving the corresponding latch device to the release position.

13. The apparatus according to claim 12 , wherein the power supplies include a n number of necessary power supplies and a k number of redundant power supplies, wherein the n is a positive integer number, the k is another positive integer number.

14. The apparatus according to claim 13 , wherein the n or more number of power supplies are necessary to operate the one or more electronic machine, and failures of the k or less number of power supplies are allowed to operate the one or more electronic machine.

15. The apparatus according to claim 14 , further comprising:

an electric circuit being connected to the power supplies in parallel,

wherein the electric circuit performs:

for each power supply, concurrently comparing an electric power measurement against pre-determined lower and higher electric power thresholds, comparing an electric voltage measurement against pre-determined lower and higher electric voltage thresholds, or comparing an electric current measurement of electricity provided from each power supply against pre-determined lower and higher electric current thresholds;

determining, based on the comparison, a number of power supplies that operates normally, the normal operation of a power supply includes: generating electricity whose electric power measurement, electric voltage measurement or electric current measurement is between the respective lower and higher pre-determined electric power thresholds, lower and higher electric voltage thresholds or lower and higher electric current thresholds; and

controlling, based on the determination, an operation of each power supply.

16. The apparatus according to claim 15 , wherein in order to perform the controlling, the electric circuit performs:

determining whether n number or more than n number of power supplies operate normally; and

releasing all latch devices of all the power supplies if the n number or more than n number of power supplies normally operate.