WO2013136475A1

WO2013136475A1 - Power supply device and power-on controlling method

Info

Publication number: WO2013136475A1
Application number: PCT/JP2012/056597
Authority: WO
Inventors: 弘進影山; 荒木　達男
Original assignee: 富士通株式会社
Priority date: 2012-03-14
Filing date: 2012-03-14
Publication date: 2013-09-19

Abstract

A power supply device (10a) comprises three AC-DC conversion power supplies (11 to 13) and a service processor (14). The service processor (14) does not send a power-on instruction to each of the AC-DC conversion power supplies, but sends power-on instructions to a power factor improving circuit and a converter both possessed by each of the AC-DC conversion power supplies. The service processor (14) shifts the power-on instructions sent to the power factor improving circuits in the three AC-DC conversion power supplies so that start-up currents are not overlapped, and, after all the power factor improving circuits have been powered on, simultaneously gives power-on instructions to all the converters.

Description

Power supply device and power-on control method

The present invention relates to a power supply device and a power-on control method.

In an electronic device equipped with a plurality of AC-DC conversion power supplies (hereinafter referred to as “AC-DC conversion power supplies”), if all AC-DC conversion power supplies are turned on at the same time, the start-up currents overlap and an excessive current Flows. For this reason, the uninterruptible power supply connected to the front stage of the electronic device (hereinafter referred to as “UPS (Uninterruptible Power Supply)”) detects an overcurrent abnormality and stops the output.

FIG. 22 is a diagram illustrating an information processing apparatus including a plurality of AC-DC conversion power supplies. As shown in FIG. 22, the information processing apparatus 90 includes three AC-DC conversion power supplies 91 to 93 and a service processor 94. AC-DC conversion power supplies 91 to 93 are each connected to UPS 1 and supply power to information processing apparatus 90. The service processor 94 instructs the AC-DC conversion power supplies 91 to 93 to be turned on and stopped. In FIG. 22, a current I indicates a current flowing through the UPS 1.

FIG. 23 is a diagram showing the starting current of the information processing apparatus 90. In FIG. 23, the vertical axis represents current I, and the horizontal axis represents time t. As shown in FIG. 23, when the AC-DC conversion power supplies 91 to 93 are simultaneously turned on, (1) a starting current flows simultaneously in the power factor correction circuit included in each AC-DC conversion power supply, and then (2) A starting current flows simultaneously in the converter included in each AC-DC conversion power supply. Here, when a starting current flows through the three power factor correction circuits simultaneously, the current I flowing through the UPS 1 exceeds the UPS overcurrent detection point, and the UPS 1 stops outputting.

Therefore, the service processor 94 shifts the application timings of the AC-DC conversion power supplies 91 to 93 and performs the sequence input so that the start-up currents do not overlap. FIG. 24 is a diagram illustrating a start-up current of the information processing apparatus 90 when the AC-DC power supply is sequenced. As shown in FIG. 24, the service processor 94 instructs the AC-DC conversion power supplies 91 to 93 to turn on in order so that the starting currents do not overlap. For this reason, the current I flowing through the UPS 1 does not exceed the UPS overcurrent detection point, and the UPS 1 operates normally.

FIG. 23 and FIG. 24 are diagrams schematically showing the starting current, and actually an AC starting current flows instead of a direct current. Further, the AC-DC conversion power supply includes a current that flows after the power factor correction circuit is activated, but these currents are omitted in the figure.

In addition, as a conventional technology, a power supply control system divides a plurality of devices constituting a computer system into partial parts and connects them to ports, and the time-series power load characteristics are the maximum power capacity in units of ports. In addition, there is a technology for turning on the power so that the allowable additional fluctuation range is not exceeded.

Japanese Examined Patent Publication No. 6-100949 JP 2008-79376 A International Publication No. 2004/059822

However, when the service processor 94 sequentially turns on the AC-DC conversion power supplies 91 to 93, there is a problem that the power-on completion time becomes longer due to the number of installed power supplies. For example, when the turn-on time of one AC-DC conversion power supply is 1 second, the time required to turn on the three AC-DC conversion power supplies is 3 seconds, which is three times that when the power is turned on simultaneously.

An object of one aspect of the present invention is to shorten the completion time of turning on an AC-DC conversion power supply of an electronic device.

In one aspect, the power supply device disclosed in the present application converts an AC voltage into a DC voltage and converts a DC voltage output from the power factor improvement circuit that reduces harmonic current and the DC voltage output from the power factor improvement circuit into a different DC voltage. A plurality of power supply units including a converter; Further, in the power supply device disclosed in the present application, the current flowing through the device when the power is turned on may exceed a predetermined overcurrent threshold due to the start-up currents of the power factor correction circuit and the converter overlapping between the plurality of power supply units. A control unit for controlling the turning on of a plurality of power supply units. Further, the control unit controls the turning on of the plurality of power supply units so that the turning-on time is shorter than the turning-on time required when turning on the plurality of power supply units in order.

According to one embodiment, the completion time of turning on the AC-DC conversion power of the electronic device can be shortened.

FIG. 1 is a diagram illustrating a configuration of a power supply device included in the information processing apparatus according to the first embodiment. FIG. 2 is a diagram illustrating a configuration of an AC-DC conversion power supply. FIG. 3 is a diagram illustrating a configuration of the power factor correction circuit. FIG. 4 is a diagram showing voltage waveforms at (A) to (C) of the power factor correction circuit. FIG. 5 is a diagram showing the timing at which the service processor sends a turn-on instruction to each AC-DC conversion power supply. FIG. 6 is a diagram illustrating the startup current of the information processing apparatus according to the first embodiment. FIG. 7 is a flowchart showing a procedure of power-on processing by the service processor. FIG. 8 is a diagram showing a specific example of timing at which the service processor sends a turn-on instruction to each AC-DC conversion power supply. FIG. 9 is a diagram illustrating the startup current of the information processing apparatus according to the second embodiment. FIG. 10 is a flowchart illustrating a procedure of power-on processing by the service processor according to the second embodiment. FIG. 11 is a diagram illustrating the configuration of the power supply device included in the information processing apparatus according to the third embodiment. FIG. 12 is a diagram illustrating a configuration of an AC-DC conversion power supply. FIG. 13 is a diagram illustrating an example of the insertion timing information stored in the insertion timing information storage unit. FIG. 14 is a diagram illustrating an example of the input instruction command. FIG. 15 is a flowchart showing a procedure of power-on processing by the service processor. FIG. 16 is a diagram illustrating the configuration of the power supply device included in the information processing apparatus according to the fourth embodiment. FIG. 17 is a diagram illustrating a configuration of an AC-DC conversion power supply. FIG. 18 is a flowchart illustrating a procedure of power-on processing by the service processor according to the fourth embodiment. FIG. 19 is a diagram illustrating an example of timing at which the service processor sends a turn-on instruction to each AC-DC conversion power source. FIG. 20 is a diagram illustrating the startup current of the information processing apparatus according to the fifth embodiment. FIG. 21 is a flowchart illustrating a procedure of power-on processing by the service processor according to the fifth embodiment. FIG. 22 is a diagram illustrating an information processing apparatus including a plurality of AC-DC conversion power supplies. FIG. 23 is a diagram illustrating a startup current of the information processing apparatus. FIG. 24 is a diagram illustrating a start-up current of the information processing apparatus when the AC-DC power supply is sequenced.

Hereinafter, embodiments of a power supply device and a power-on control method disclosed in the present application will be described in detail with reference to the drawings. Note that this embodiment does not limit the disclosed technology.

First, the configuration of the power supply device included in the information processing apparatus according to the first embodiment will be described. FIG. 1 is a diagram illustrating a configuration of a power supply device included in the information processing apparatus according to the first embodiment. As shown in FIG. 1, the power supply device 10 a included in the information processing apparatus 10 includes three AC-DC conversion power supplies 11 to 13 and a service processor 14.

AC-DC conversion power supplies 11 to 13 are each connected to the UPS 1, convert an AC voltage supplied from the UPS 1 into a DC voltage, and supply it to the information processing apparatus 10. The service processor 14 performs control such as turning on and off the AC-DC conversion power supplies 11 to 13.

FIG. 2 is a diagram showing the configuration of the AC-DC conversion power supply 11. Since the AC-DC conversion power supplies 11 to 13 all have the same configuration, the AC-DC conversion power supply 11 will be described as an example here. As shown in FIG. 2, the AC-DC conversion power supply 11 includes a power factor correction circuit 11a and a converter 11b.

The power factor correction circuit 11a is a circuit that converts an alternating voltage into a direct current voltage and reduces harmonic current, and the converter 11b is a circuit that converts the direct current voltage output from the power factor improvement circuit 11a into a different direct current voltage. .

FIG. 3 is a diagram showing a configuration of the power factor correction circuit 11a, and FIG. 4 is a diagram showing voltage waveforms at (A) to (C) of the power factor improvement circuit 11a. As shown in FIG. 3, the power factor correction circuit 11a includes an EMI (Electro Magnetic Interference) filter 3, a full-wave rectifier circuit 4, a coil 5, a diode 6, an N-channel MOSFET (hereinafter referred to as “NMOS”) 7, a capacitor. 8 has.

The EMI filter 3 is a circuit that removes noise from the AC voltage supplied from the AC power supply 2, and the full-wave rectifier circuit 4 is a circuit that full-wave rectifies the AC voltage from which noise has been removed by the EMI filter 3. If the input voltage to the EMI filter 3 is an AC voltage shown in FIG. 4A, the output voltage of the full-wave rectifier circuit 4 becomes a pulsating voltage shown in FIG. 4B.

When the NMOS 7 is turned on / off, a switching current repeatedly flows through the coil 5 and energy is stored in the coil 5. Then, the stored energy is converted into a DC voltage, and the capacitor 8 is charged. FIG. 4C shows the DC voltage output from the power factor correction circuit 11a. In FIG. 3, the portion excluding the EMI filter 3 and the full-wave rectifier circuit 4 may be referred to as a “power factor correction circuit”. It will be called a “rate improvement circuit”.

Returning to FIG. 1, unlike the service processor 94, the service processor 14 does not issue a turn-on instruction to each AC-DC conversion power source, but separately turns on a power factor correction circuit and a converter. I do. Specifically, the service processor 14 instructs the power factor correction circuit of each AC-DC conversion power supply so as not to overlap the starting current, and then issues the input instruction to all the converters collectively.

FIG. 5 is a diagram showing the timing at which the service processor 14 sends a turn-on instruction to each AC-DC conversion power source. As shown in FIG. 5, the service processor 14 first sends an input instruction to the power factor correction circuit of the AC-DC conversion power supply 11 (1), and then the AC-DC conversion power supply 12 so that the starting currents do not overlap. (2) is sent to the power factor correction circuit. Then, the service processor 14 sends an input instruction to the power factor correction circuit of the AC-DC conversion power source 13 so that the starting currents do not overlap (3), and then simultaneously inputs to the converters of the AC-DC conversion power sources 11-13. Send instructions.

FIG. 6 is a diagram illustrating the starting current of the information processing apparatus 10 according to the first embodiment. As shown in FIG. 6, first, a starting current flows when the power factor correction circuit of the AC-DC conversion power supply 11 is turned on. Thereafter, a starting current flows when the power factor correction circuit of the AC-DC conversion power supply 12 is turned on, and then a starting current flows when the power factor improvement circuit of the AC-DC conversion power supply 13 is turned on. Then, a starting current flows when the converters of the AC-DC conversion power supplies 11 to 13 are turned on.

Thus, the service processor 14 shifts the power factor correction circuit input instructions of the respective AC-DC conversion power supplies and simultaneously performs the converter input instructions. Therefore, the service processor 14 can prevent the generation of an excessive current due to the overlap of the startup currents, and can shorten the completion time of turning on all the AC-DC conversion power supplies as compared with the conventional case.

Next, the procedure of power-on processing by the service processor 14 will be described. FIG. 7 is a flowchart showing a procedure of power-on processing by the service processor 14. As shown in FIG. 7, when receiving the power-on instruction, the service processor 14 sends the power-on instruction to the power factor correction circuit of the AC-DC conversion power supply 11 (step S11).

Then, the service processor 14 determines whether or not the power factor correction circuit of the AC-DC conversion power source 11 has been turned on (step S12). (Step S13).

Then, the service processor 14 determines whether or not the power factor correction circuit of the AC-DC conversion power source 12 has been turned on (step S14). A sending instruction is sent to (step S15).

Then, the service processor 14 determines whether or not the power factor correction circuit of the AC-DC conversion power supply 13 has been turned on (step S16). An input instruction is sent (step S17). Then, the service processor 14 determines whether or not the conversion of the converters of the AC-DC conversion power supplies 11 to 13 is completed (step S18), and when the input is completed, the process ends.

As described above, in the first embodiment, the service processor 14 shifts the input instructions to the power factor correction circuits of the three AC-DC conversion power supplies 11 to 13 so that the start-up currents do not overlap, and all the power factors After the improvement circuit has been turned on, all the converters are instructed simultaneously. Therefore, the service processor 14 can prevent the generation of an excessive current due to the overlap of the startup currents, and can shorten the completion time of turning on the AC-DC conversion power of the information processing apparatus 10.

By the way, in the first embodiment, how to shift the input instruction to the power factor correction circuit of the AC-DC conversion power supplies 11 to 13 was not described. Therefore, in the second embodiment, a case will be described in which the input instruction is shifted by giving an input instruction to the power factor correction circuits of the AC-DC conversion power supplies 11 to 13 at predetermined time intervals.

FIG. 8 is a diagram showing a specific example of timing at which the service processor 14 sends a turn-on instruction to each AC-DC conversion power source. As shown in FIG. 8, the service processor 14 first sends an input instruction to the power factor correction circuit of the AC-DC conversion power supply 11 (1), and 0.4 seconds later, the power factor of the AC-DC conversion power supply 12 is sent. Sending the input instruction to the improvement circuit (2). Here, 0.4 seconds is the time required from the start to completion of each AC-DC conversion power supply. The service processor 14 then sends an input instruction to the power factor correction circuit of the AC-DC conversion power supply 13 after another 0.4 seconds (3), and further 0.4 seconds later, the AC-DC conversion power supplies 11 to 13 Simultaneously send input instructions to the converters.

FIG. 9 is a diagram illustrating the starting current of the information processing apparatus 10 according to the second embodiment. As shown in FIG. 9, first, a starting current flows by turning on the power factor correction circuit of the AC-DC conversion power supply 11. Then, after 0.4 seconds, a starting current flows due to turning on the power factor correction circuit of the AC-DC conversion power supply 12, and after 0.4 seconds, the starting current due to turning on the power factor improvement circuit of the AC-DC conversion power supply 13 Flows. Further, 0.4 seconds later, a starting current flows when the converters of the AC-DC conversion power supplies 11 to 13 are turned on.

In this manner, the service processor 14 shifts the power factor correction circuit input instruction of each AC-DC conversion power supply by 0.4 seconds, and after 0.4 second from the input of the power factor correction circuit of the AC-DC conversion power supply 13 Injecting instructions at the same time. Therefore, the service processor 14 prevents an excessive current from being generated due to the overlap of the startup currents, and shortens the completion time of turning on all the AC-DC conversion power supplies to 0.4 + 0.4 + 0.4 + 0.6 = 1.8 seconds. be able to.

Next, the procedure of power-on processing by the service processor 14 according to the second embodiment will be described. FIG. 10 is a flowchart illustrating a procedure of power-on processing by the service processor 14 according to the second embodiment. As shown in FIG. 10, when receiving the power-on instruction, the service processor 14 sends a power-on instruction to the power factor correction circuit of the AC-DC conversion power supply 11 (step S21).

Then, the service processor 14 determines whether or not 0.4 seconds have elapsed from the instruction to turn on the AC-DC conversion power supply 11 to the power factor correction circuit (step S22). An input instruction is sent to the power factor correction circuit of the conversion power supply 12 (step S23).

Then, the service processor 14 determines whether or not 0.4 seconds have elapsed from the instruction to turn on the AC-DC conversion power supply 12 to the power factor correction circuit (step S24). An input instruction is sent to the power factor correction circuit of the conversion power supply 13 (step S25).

Then, the service processor 14 determines whether or not 0.4 seconds have elapsed from the instruction to turn on the AC-DC conversion power supply 13 to the power factor correction circuit (step S26). An input instruction is sent to the converters of the conversion power supplies 11 to 13 (step S27). Then, the service processor 14 determines whether or not 0.6 seconds have elapsed from the instruction to turn on the converters of the AC-DC conversion power supplies 11 to 13 (step S28), and ends processing when 0.6 seconds have elapsed. . Here, 0.6 seconds is the time required from the start of charging to completion of the converter.

As described above, in the second embodiment, the service processor 14 shifts the input instruction to the power factor correction circuit of each AC-DC conversion power supply by 0.4 seconds to improve the power factor of the AC-DC conversion power supply 13. A converter input instruction is simultaneously issued 0.4 seconds after an instruction to input to the circuit. Therefore, the service processor 14 can prevent the generation of an excessive current due to the overlap of the start-up currents, and can shorten the turn-on of all AC-DC conversion power supplies to 1.8 seconds.

In the first and second embodiments, the case where the service processor sends the input instruction to the power factor correction circuit and the converter has been described. However, the service processor receives information specifying the input timing of the power factor improvement circuit and the converter as an AC-DC conversion power supply. It can also be sent to. Therefore, a case where the service processor sends information specifying the power factor correction circuit and the input timing of the converter to the AC-DC conversion power supply will be described.

First, the configuration of the power supply device included in the information processing apparatus according to the third embodiment will be described. FIG. 11 is a diagram illustrating the configuration of the power supply device included in the information processing apparatus according to the third embodiment. As shown in FIG. 11, the power supply device 30 a included in the information processing apparatus 30 includes three AC-DC conversion power supplies 31 to 33 and a service processor 34.

AC-DC conversion power supplies 31 to 33 are each connected to the UPS 1, convert the AC voltage supplied from the UPS 1 into a DC voltage, and supply the DC voltage to the information processing apparatus 30. The service processor 34 performs control such as turning on / off the AC-DC conversion power supplies 31 to 33.

FIG. 12 is a diagram showing the configuration of the AC-DC conversion power supply 31. Note that the AC-DC conversion power supplies 31 to 33 all have the same configuration, and therefore the AC-DC conversion power supply 31 will be described as an example here. As shown in FIG. 12, the AC-DC conversion power supply 31 includes a power factor correction circuit 31a, a converter 31b, and a control unit 31c.

The power factor improvement circuit 31a is a circuit that converts an AC voltage into a DC voltage and reduces harmonic current, and the converter 31b is a circuit that converts the DC voltage output from the power factor improvement circuit 31a into a different DC voltage. . Upon receiving an instruction from the service processor 34, the control unit 31c instructs the power factor correction circuit 31a and the converter 31b to input.

The service processor 34 has an input timing information storage unit 34a. The turning-on timing information storage unit 34a stores turning-on timing information of the AC-DC conversion power supply. FIG. 13 is a diagram illustrating an example of the insertion timing information stored in the insertion timing information storage unit 34a. As shown in FIG. 13, the turn-on timing information storage unit 34 a stores the turn-on waiting time of each power factor correction circuit, the turn-on wait time of the converter, and the power-on completion time for each number of installed AC-DC conversion power supplies.

In FIG. 13, “Skip” indicates that there is no waiting time, that is, there is no need to wait because there is no corresponding power factor correction circuit. For example, when the number of AC-DC conversion power supplies mounted is “2”, the waiting time for turning on the power factor correction circuits # 0 and # 1 is “0.4 seconds”, but the power factor correction circuit # 2 Because there is no, the input waiting time is “skip”.

The service processor 34 creates a turn-on instruction command based on the turn-on timing information stored in the turn-on timing information storage unit 34a and the number of AC-DC conversion power supplies mounted on the power supply device, and transmits the command to each AC-DC conversion power supply. To do.

FIG. 14 is a diagram illustrating an example of the input instruction command. As shown in FIG. 14, the turn-on instruction command includes the number of AC-DC conversion power supplies mounted, the turn-on start time of each power factor correction circuit, the turn-on waiting time of the converter, and the turn-on completion time.

In the example shown in FIG. 14, the number of AC-DC conversion power supplies mounted is “3”, and the power factor correction circuit # 0 is turned on after “0 seconds” after receiving the input instruction command, that is, after receiving the input instruction command. Immediately, the power factor correction circuit # 1 is turned on “0.4 seconds” after the receiving instruction command is received. The power factor correction circuit # 2 is turned on after “0.8 seconds” after receiving the input instruction command, and the converter is input after “1.2 seconds” after receiving the input instruction command.

When the control unit of each AC-DC conversion power supply receives the input instruction command from the service processor 34, it analyzes the input instruction command and controls the input of the power factor correction circuit and the converter according to the input instruction command.

Specifically, when the control unit of the AC-DC conversion power supply 31 receives the input instruction command, the control unit of the power factor correction circuit # 0 is input, and when the control unit of the AC-DC conversion power supply 32 receives the input instruction command, 0 is input. 4. Power factor correction circuit # 1 is turned on after 4 seconds. The control unit of the AC-DC conversion power supply 33 turns on the power factor correction circuit # 2 0.8 seconds after receiving the turn-on instruction command, and the control unit of each AC-DC conversion power supply receives the turn-on instruction command. After 1.2 seconds, turn on the converter.

As described above, the control unit of each AC-DC conversion power supply inputs the power factor correction circuit and the converter based on the input instruction command received from the service processor 34. Therefore, the service processor 34 can turn on each AC-DC conversion power supply only by transmitting a turn-on instruction command to each AC-DC conversion power supply.

Next, the procedure of power-on processing by the service processor 34 will be described. FIG. 15 is a flowchart showing a procedure of power-on processing by the service processor 34. As shown in FIG. 15, when the service processor 34 receives a power-on instruction, the service processor 34 sends a power-on instruction command to the AC-DC converted power supplies 31-33, thereby instructing the AC-DC converted power supplies 31-33 to turn on. (Step S31).

Then, the service processor 34 determines whether or not 1.8 seconds have passed (step S32), and when 1.8 seconds have passed, the process is terminated. Here, 1.8 seconds is a time until completion of turning on when each control unit turns on the power factor correction circuits and converters of the AC-DC conversion power supplies 31 to 33 based on the turning instruction command.

As described above, in the third embodiment, the service processor 34 creates the input instruction command based on the input timing information storage unit 34a and transmits it to each AC-DC conversion power source. Then, the control unit of each AC-DC conversion power supply turns on the power factor correction circuit and the converter based on the turn-on instruction command. Therefore, the service processor 34 can turn on the AC-DC conversion power supply only by transmitting the turn-on instruction command.

In the second embodiment, the case where the service processor sends an input instruction to the next power factor correction circuit or converter when a predetermined time has elapsed has been described. However, the service processor can also send a closing instruction to the next power factor improving circuit or converter by receiving a notification of closing completion from the power factor improving circuit. Therefore, a case will be described in which when the service processor receives a notification of completion of input from the power factor correction circuit, a input instruction is sent to the next power factor correction circuit or converter.

First, the configuration of the power supply device included in the information processing apparatus according to the fourth embodiment will be described. FIG. 16 is a diagram illustrating the configuration of the power supply device included in the information processing apparatus according to the fourth embodiment. As shown in FIG. 16, the power supply device 40 a included in the information processing apparatus 40 includes three AC-DC conversion power supplies 41 to 43 and a service processor 44.

AC-DC conversion power supplies 41 to 43 are connected to the UPS 1, respectively, and convert an AC voltage supplied from the UPS 1 into a DC voltage and supply it to the information processing apparatus 40. The service processor 44 performs control such as turning on and off the AC-DC conversion power supplies 41 to 43.

FIG. 17 is a diagram showing the configuration of the AC-DC conversion power supply 41. Note that the AC-DC conversion power supplies 41 to 43 all have the same configuration, and therefore the AC-DC conversion power supply 41 will be described as an example here. As shown in FIG. 17, the AC-DC conversion power supply 41 includes a power factor correction circuit 41a and a converter 41b.

The power factor correction circuit 41a and the converter 41b receive the input instruction from the service processor 44, and transmit a completion notification to the service processor 44 when the input is completed. That is, as shown in FIG. 16, the service processor 44 transmits a closing instruction to the power factor correction circuit and the converter of each AC-DC conversion power supply, and a completion notification indicating that the charging is completed from the power factor correction circuit and the converter. Receive.

As described above, the service processor 44 can know that the input based on the instruction is completed by receiving the completion notification from the power factor correction circuit and the converter of each AC-DC conversion power supply.

Next, the procedure of power-on processing by the service processor 44 according to the fourth embodiment will be described. FIG. 18 is a flowchart illustrating a procedure of power-on processing by the service processor 44 according to the fourth embodiment. As shown in FIG. 18, when receiving the power-on instruction, the service processor 44 sends a power-on instruction to the power factor correction circuit of the AC-DC conversion power supply 41 (step S41).

Then, the service processor 44 determines whether or not a completion notification has been received from the power factor correction circuit of the AC-DC conversion power supply 41 (step S42). An input instruction is sent (step S43).

Then, the service processor 44 determines whether or not a completion notification has been received from the power factor correction circuit of the AC-DC conversion power source 42 (step S44). An input instruction is sent (step S45).

Then, the service processor 44 determines whether or not a completion notification has been received from the power factor correction circuit of the AC-DC conversion power supply 43 (step S46), and when received, inputs it to the converters of the AC-DC conversion power supplies 41 to 43. An instruction is sent (step S47). Then, the service processor 44 determines whether or not a completion notification has been received from the converters of the AC-DC conversion power supplies 41 to 43 (step S48).

As described above, in the fourth embodiment, the service processor 44 transmits an input instruction to the power factor correction circuit of each AC-DC conversion power supply, and receives the completion notification from the power factor improvement circuit when the input is completed. Therefore, the service processor 44 can transmit the input instruction to the next power factor correction circuit or converter based on the completion notification.

By the way, in the first to fourth embodiments described above, the case where the service processor separately gives input instructions to the power factor correction circuit and the converter has been described. However, even when the service processor collectively issues an input instruction to the AC-DC conversion power supply, it is possible to prevent the startup currents of the power factor correction circuits from overlapping. Thus, in a fifth embodiment, a power supply apparatus will be described in which the service processor performs a turn-on instruction collectively for the AC-DC conversion power supply and the start-up currents of the power factor correction circuits do not overlap.

FIG. 19 is a diagram showing an example of the timing of the turn-on instruction sent from the service processor to each AC-DC conversion power source. As shown in FIG. 19, the service processor first sends a turn-on instruction to the AC-DC conversion power supply # 0 (1), and the AC-DC conversion power supply # 0 completes the turn-on after 1.8 seconds. Further, the service processor sends a turn-on instruction to the AC-DC conversion power supply # 1 0.4 seconds after sending the turn-on instruction to the AC-DC conversion power supply # 0 (2). Complete the loading after 8 seconds. Also, the service processor sends a turn-on instruction to the AC-DC conversion power supply # 2 0.4 seconds after sending the turn-on instruction to the AC-DC conversion power supply # 1 (3). Complete the loading after 8 seconds. Therefore, the service processor can complete the application of the AC-DC conversion power supplies # 0 to # 2 in 2.6 seconds.

FIG. 20 is a diagram illustrating the starting current of the information processing apparatus according to the fifth embodiment. As shown in FIG. 20, first, a starting current flows through the power factor correction circuit of the AC-DC conversion power source # 0. Then, after 0.4 seconds, a startup current by the power factor improvement circuit of the AC-DC conversion power source # 1 flows, and after 0.4 seconds, a startup current by the power factor improvement circuit of the AC-DC conversion power source # 2 flows. Further, 0.4 seconds later, a starting current by the converter of the AC-DC conversion power source # 0 flows, and further 0.4 seconds later, a starting current by the converter of the AC-DC conversion power source # 1 flows. Further, 0.4 seconds later, a starting current flows through the converter of the AC-DC conversion power supply # 2.

In this way, the service processor shifts the instruction to turn on each AC-DC conversion power by 0.4 seconds. Then, the designer designs the power supply apparatus so that the start-up current of the converter of AC-DC conversion power supply # 0 flows after the start-up current of the power factor correction circuit of all AC-DC conversion power supplies has finished flowing. Then, the service processor can prevent the generation of an excessive current due to the overlap of the startup currents, and can shorten the completion time of turning on all the AC-DC conversion power supplies to 2.6 seconds.

Next, the procedure of power-on processing by the service processor according to the fifth embodiment will be described. FIG. 21 is a flowchart illustrating a procedure of power-on processing by the service processor according to the fifth embodiment. As shown in FIG. 21, when the service processor receives the power-on instruction, the service processor sends the power-on instruction to the AC-DC conversion power source # 0 (step S51).

Then, the service processor determines whether or not 0.4 seconds have elapsed from the instruction to turn on the AC-DC conversion power supply # 0 (step S52). A charging instruction is sent (step S53).

Then, the service processor determines whether or not 0.4 seconds have elapsed from the instruction to turn on the AC-DC conversion power source # 1 (step S54). An input instruction is sent (step S55).

Then, the service processor determines whether or not 1.8 seconds have elapsed from the instruction to turn on the AC-DC conversion power source # 2 (step S56), and ends the processing when 1.8 seconds have elapsed. Here, 1.8 seconds is the time required from the start to completion of the AC-DC conversion power supply # 2.

As described above, in the fifth embodiment, the service processor shifts the input instruction to each AC-DC conversion power supply by 0.4 seconds. In addition, the designer designs the power supply device so that the start-up current of the converter of AC-DC power supply # 0 flows after the start-up current of the power factor correction circuit of all AC-DC conversion power supplies flows. Therefore, the service processor can prevent the generation of an excessive current due to the overlap of the start-up currents, and can shorten the turn-on of all AC-DC conversion power supplies to 2.6 seconds.

In the first to fifth embodiments, the case where the power factor correction circuits are sequentially turned on and the converters are turned on after all the power factor correction circuits are turned on has been described. However, the present invention is not limited to this, and the power supply apparatus controls the power-on so that the current flowing through the power supply apparatus does not exceed the UPS overcurrent detection point due to the introduction of a plurality of power factor correction circuits. The same can be applied to the case. However, the power supply device needs to be controlled so that the turn-on time is shorter than when the AC-DC conversion power supplies are turned on in turn.

For example, even when the startup currents of the two power factor correction circuits overlap, the power supply device can control the power-on so that the startup current flowing through the power supply device does not exceed the UPS overcurrent detection point. In addition, even when the power factor correction circuit start-up current and the converter start-up current overlap, the power supply device may control the power-on so that the start-up current flowing through the power supply device does not exceed the UPS overcurrent detection point. it can.

In the first to fifth embodiments, the case where the power supply apparatus has three AC-DC conversion power supplies has been described. However, the present invention is not limited to this, and a plurality of power supply apparatuses other than the three power supply apparatuses can be used. The same can be applied to the case of having it.

In the first to fifth embodiments, the power supply device included in the information processing apparatus has been described. However, the present invention is not limited to this, and the same applies to a power supply device included in an electronic device that requires a DC power supply. Can be applied to.

1 UPS
2 AC power supply 3 EMI filter 4 Full-wave rectifier circuit 5 Coil 6 Diode 7 NMOS
8

Capacitors

10, 30, 40, 90

Information processing devices

10a, 30a, 40a Power supply devices 11-13, 31-33, 41-43, 91-93 AC-DC

conversion power supplies

11a, 31a, 41a Power

factor improving circuit

11b, 31b, 41b converter

31c control unit

14, 34, 44, 94 service processor

Claims

A plurality of power supply units comprising a power factor correction circuit that converts alternating current voltage into direct current voltage and reduces harmonic current and a converter that converts direct current voltage output from the power factor improvement circuit into different direct current voltage;
The power factor improving circuit and the starting current of the converter are overlapped between a plurality of power supply units, so that the current flowing to the device when the power is turned on does not exceed a predetermined overcurrent threshold, and the plurality of power supply units And a control unit that controls the turning-on of the plurality of power supply units so that the turning-on time is shorter than the turning-on time required for turn-on in turn.
2. The power supply apparatus according to claim 1, wherein the control unit separately designates turning on of the power factor correction circuit and turning on of the converter for each power supply unit.
The control unit instructs the power factor correction circuit of each power supply unit to shift so that the starting currents of the power factor correction circuits do not overlap, and then instructs the converter of each power supply unit to input The power supply device according to claim 2.
The control unit, after giving a power-in instruction to the power factor correction circuit, performs a power-in instruction to another power factor improvement circuit when a predetermined time elapses by targeting the plurality of power supply units. 4. The power supply device according to claim 3, wherein the power-on device is instructed to be shifted so that the start-up currents of the improvement circuits do not overlap.
3. The power supply apparatus according to claim 2, wherein the control unit designates a power-on improvement start time for each power supply unit and a turn-on start time for the converter, and instructs each power supply unit to turn on.
For the plurality of power supply units, the control unit is configured to receive a completion notification from the power factor correction circuit and instruct the other power factor correction circuit to input after inputting the input command to the power factor correction circuit. 4. The power supply device according to claim 3, wherein the power-on device is instructed to be shifted so as not to overlap the start-up currents of the power factor correction circuits.
The control unit instructs each power supply unit to turn on the power by shifting so that the starting currents of the power factor correction circuits do not overlap,
2. The power supply device according to claim 1, wherein each power supply unit turns on the converter after the activation of the power factor improvement circuits for the number of power supply units is completed after the power factor improvement circuit is activated.
A power supply device having a plurality of power supply units including a power factor correction circuit that converts an AC voltage into a DC voltage and reduces harmonic current and a converter that converts a DC voltage output from the power factor improvement circuit into a different DC voltage In the power-on control method of
The power factor improving circuit and the starting current of the converter are overlapped between a plurality of power supply units, so that the current flowing to the device when the power is turned on does not exceed a predetermined overcurrent threshold, and the plurality of power supply units A power-on control method characterized by controlling the power-on of a plurality of power supply units so that the power-on time is shorter than the power-on time required for sequential power-on.