TWI398067B - Backup power supply backplane - Google Patents

Description

Backup power backplane

A backplane for a redundant power supply, in particular, a backplane improved architecture that connects multiple power supplies and integrates multiple power supply outputs.

In order to avoid sudden power failure or power failure, the backup power system has been used by the electronics industry. The backup power system mainly uses parallel power to connect more than two power supplies. When one power supply generates an abnormal fault, the remaining power supplies will continue to output stable power for the electronic device to operate. Specifically, the backup power supply system mainly comprises a fixed frame of a fixed plurality of power supplies and a power backplane electrically connected to the plurality of power supplies, wherein the power backplane is provided with at least a detection power supply. State detection circuit, power balance circuit integrating multiple power supplies, protection circuit for tripping abnormal state, and the like.

The structure of the above power backplane can be found in the Republic of China Patent Certificate No. I271015 "Reservation Power Supply with AC/DC Power Input". According to the manual and the drawings, the creation reveals at least a DC/DC power supply. And at least one AC/DC power supply is connected to a power control circuit board, wherein the power control circuit board includes a power balance unit for controlling a DC/DC power supply and an AC/DC power supply output power ratio, a detection circuit for detecting a working state of a DC/DC power supply and an AC/DC power supply, and a power output circuit for integrating DC power, wherein the power balance unit is configured to determine an output power of the individual power supply Comparing, the detecting circuit obtains a normal operation signal (PG signal) of the power supply device to determine that the power supply device is in normal operation, and the power supply device Power is integrated and output to the load via the power output circuit.

The power balancing unit described above is originally used to control multiple power supplies to provide the same current in the power backplane (the same current represents the same power output under the same output voltage), but in practical applications, A power supply may have an aging or output impedance difference that cannot evenly burden the same power. If it is forced to provide the same power, the power supply that is aging or faulty may be overloaded to accelerate aging or failure. In order to maintain the normal operation of the electrical equipment, another power supply is forced to fully bear the output power and exceed the load, greatly reducing the service life of the backup power supply system, thus developing the current load distribution technology of the main power unit ( Current Sharing Technique) to solve the above problems, as shown in U.S. Patent Application No. 20060273740. After detecting the DC power of the output, the current load technology device returns a signal to the main power unit to adjust the output power according to the detected current signal, so that the output power of the detected main power unit is detected. An abnormality will suppress the DC power of its output and provide higher DC power to another main power unit, so that all the main power units are optimally deployed to extend the life of the backup power supply system. Reduce sudden damage.

Although the backup power system has improved the actual use safety and system durability in the above prior art, the backup power system needs to be changed according to the specifications of the load system power demand. Recently, INTEL has achieved energy-saving effects in order to limit system power consumption, and further requires that the power supply system to provide output wattage to the load system to evaluate energy consumption. Therefore, today's power supplies still need to modify their architecture according to the needs of the load system.

In summary, although the conventional backup power supply system has the function of integrating power and judging whether the power supply is functioning normally, the backup power system needs to actively provide output power by the backup power supply system. Therefore, the case is proposed to improve the existing redundant power supply system so that it can provide input. The power is changed to the load system.

The present invention is a backup power supply backplane, and the backup power supply is composed of a backplane connected to a plurality of power supplies. The backplane has a plurality of ports for connecting to the power supply, and the power supply provides an output power, a normal operation signal (PG signal) and a current balance signal to the backplane, and a power balance unit obtains the current. The signal is balanced to balance the output of the plurality of power supplies, and the backplane includes a power integration unit that obtains the output power and a detection unit that obtains the normal operation signal. After the power balance unit is connected to the plurality of power supplies, the power balance unit adjusts the current balance signals of the plurality of power supplies to have the same current magnitude, and thereby the average power output of the power supply. The normal operation signal is used by the detecting unit to determine whether the power supply is good. The present invention is characterized in that the backplane is further connected to a power balancing unit electrically connected to the power balancing unit and the detecting unit, and the power computing unit obtains the current balancing signal and the normal operation signal according to the current balancing signal and the normal operation. The result of the operation of the signal generates a power sum signal to be transmitted to a load system. Thereby, the power value of the backup power source is obtained through the current balancing signal and the operation of the normal operation signal.

In summary, the present case has the advantage of meeting the requirements of the load system, and the circuit structure of the present case is simple, so that the existing standard backup power supply system does not need to undergo a large circuit design change, which is a cost-saving creation.

1, 2‧‧‧Power supply

11‧‧‧AC/DC power supply

21‧‧‧DC/DC power supply

101, 201‧‧‧ Output power

102, 202‧‧‧ normal operation signals

103, 203‧‧‧ current balance signal

31‧‧‧Power balance unit

32‧‧‧Detection unit

33‧‧‧Power Integration Unit

35‧‧‧Power Unit

351‧‧‧Power sum signal

4‧‧‧Load system

51, 52‧‧‧ Power source

510‧‧‧AC power source

520‧‧‧DC power source

FIG. 1 is a block diagram of an implementation circuit of the present invention.

2 is a block diagram of another embodiment of the present invention.

This case is a backplane of a backup power supply. Please refer to the circuit block diagram in Figure 1. The backup power source is composed of a parallel power connection and a backplane formed by the plurality of power supplies 1 and 2, wherein the backup power source adopts an N+M power supply 1, 2, and the N≧1 M≧1, where N is the drive electrical The number of power supplies 1, 2 required for the sum of the electrical power loads of the equipment operation, and M is the number of allowable power supplies 1, 2 to be damaged. Each of the power supplies 1, 2 is electrically connected to an external power source 51, 52 to convert the power output. The power supply 1 and 2 provide an output power 101, 201, a normal operation signal 102, 202 (ie, a PG signal), and a current balancing signal 103, 203. The backplane integrates the power supplies 1, 2 The output power 101, 201 supplies the power demand of a load system 4.

The backplane has at least one power integration unit 33 for obtaining the output powers 101 and 201 and a detection unit 32 for obtaining the normal operation signals 102 and 202. The normal operation signals 102 and 202 are detected by the detection unit. 32 judges that the power supplies 1, 2 are activated and can be output normally. A power balancing unit 31 for obtaining the current balancing signals 103 and 203 is further connected between the plurality of power supplies 1 and 2, and the current balancing signals 103 and 203 are connected to the power supply 1 and 2 by the power balancing unit 31. Handshake (known as "handshaking" in the industry), and through the power balance unit 31 to control the two power supplies 1, 2 to reach a state of balance, at this time, the current balance signals of the plurality of power supplies 1, 2 103, 203 should have the same current size.

The present invention is characterized in that the backplane further has a power operation unit 35, and the power operation unit 35 obtains the normal operation signals 102 and 202 and the current balance signals 103 and 203. Since the power balance signals 103 and 203 output by the power supply unit 1 and the second power supply unit 31 are the same, the power calculation unit 35 determines the power supply of the backplane connection according to the normal operation signals 102 and 202. The number of devices 1, 2, and the sum of the power supply devices 1, 2 and the magnitude of the current balancing signals 103, 203 are determined to calculate the sum of the powers of the plurality of power supplies 1, 2, thereby generating a power sum signal 351 to The load system 4. The power operation unit 35 may include a counter for calculating the number of the normal operation signals 102, 202, and a multiplication circuit that obtains the product of the quantity and current balance signals 103, 203 as the power sum signal 351, but due to the execution count and multiplication The logic circuit is a basic circuit that is known in the industry, so the case is not limited. The circuit architecture of the power operation unit 35 is as long as the circuit capable of performing the above functions of the present invention is within the scope of the present invention. The power computing unit 35 can be integrated in the circuit of the backplane, or can be independently connected to an integrated circuit chip connected to the backplane, or can be disposed on a small printed circuit board and inserted or soldered to the back. On the board. Therefore, the circuit of the backplane is not required to be redesigned, and the power operation unit 35 is configured to obtain the normal operation signals 102 and 202 and the current balance signals 103 and 203 on the backplane to calculate the total power of the backup power system. It has the advantage of saving modification costs and adapting existing backplane specifications.

The power supply 1 and 2 shown in FIG. 1 can be DC-to-DC or AC-to-DC or AC/DC. Referring to the embodiment of FIG. 2, the backplane can be connected to at least one AC/DC power supply 11 And at least the DC/DC power supply 21, and respectively connected to an AC power source 510 and a DC power source 520. The AC/DC power supply 11 and the DC/DC power supply 21 also provide an output power 101, 201. A normal operation signal 102, 202 (ie, a PG signal) and a current balancing signal 103, 203, and the normal operation signals 102, 202 (ie, PG signals) are obtained by the detecting unit 32 and the power integration unit 33, respectively. With the output powers 101, 201, the current balancing signals 103, 203 are taken by the power balancing unit 31 and reach an output balance between the AC/DC power supply 11 and the DC/DC power supply 21. The power operation unit 35 obtains the normal operation signals 102 and 202 and the current balance signals 103 and 203 to calculate the sum of the powers of the entire backup power source, thereby generating the power sum signal 351 to the load system 4 to satisfy the load system. 4 need to judge the functional requirements of power consumption.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and some modifications and refinements may be included in the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

In summary, the present invention enhances the above-mentioned effects in comparison with conventional creations, and should fully comply with the statutory innovation patent requirements of novelty and progressiveness, and submit an application according to law, and invites you to approve the invention patent. Apply for the case, to encourage creation, to the sense of virtue.

1, 2‧‧‧Power supply

101, 201‧‧‧ Output power

102, 202‧‧‧ normal operation signals

103, 203‧‧‧ current balance signal

31‧‧‧Power balance unit

32‧‧‧Detection unit

33‧‧‧Power Integration Unit

35‧‧‧Power Unit

351‧‧‧Power sum signal

4‧‧‧Load system

51, 52‧‧‧ Power source

Claims (5)

A backplane of a backup power supply, wherein the backplane has a plurality of ports connected to a plurality of power supplies, the power supply provides an output power, a normal operation signal, and a current balance signal, wherein the power balance unit obtains the The current balancing signal is used to adjust the balance of the power supply output, and the backplane includes a power integration unit that obtains the output power and a detection unit that obtains the normal operation signal, wherein the backplane is further connected: The power balance unit and the power operation unit of the normal operation signal, the power operation unit generates a power sum signal to be transmitted to a load system according to the operation result of the current balance signal and the normal operation signal. The backplane of the backup power supply of claim 1, wherein the power calculation unit can include a counter for calculating the number of the normal operation signals, and calculating the product of the quantity and the current balance signal as the power sum signal. A multiplication circuit. The backplane of the backup power source according to claim 1 or 2, wherein the power computing unit is integrated in the backplane. The backplane of the backup power supply according to the first or the second aspect of the invention, wherein the power computing unit is an integrated circuit chip connected to the backplane. The backplane of the backup power supply of claim 1 or 2, wherein the power computing unit is inserted or soldered to the backplane.