JPH11136860A - Sequentially turned-on power supply equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to automatically and sequentially delay the turn-on time of a plurality of power circuit to a load and thereby make a delayed supply of power to the load, by installing a timer before a main power supply of each of these same-type power circuits, and allowing them to automatically recognize and set a timer value. SOLUTION: When AC power (1) is supplied to a plurality of power supplies all at once from an AC power supplying means, an auxiliary power supply section 4 of each power supply starts operation first. To be more specific, when the auxiliary power supply section 4 receives AC power (1), it conducts an initialization process (for example, a self-diagnostic processing) and waits until the operation becomes stable. When the operation becomes stable, it supplies an AC detection signal (4)-n to a successive turn-on controlling section 5 and an ID setting section 6. The ID setting section 6 supplies a signal (7)-n to a switch driving section 7 based on the AC detection signal (4)-n or a supply timing signal (6)-n output from the successive turn-on controlling section 5. Then, the switch driving section 7 output a signal (9)-n to a switch section 2 based on the signal (7)-n. This is how the output timing of the output voltage (3)from each successive turn-on power circuit 1-n is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC / DC redundant power supply in an external storage device or the like, and more particularly, to an AC / DC redundant power supply device such as a computer in which the same plurality of AC / DC power supply circuits (units) are mounted. Power supply.

[0002]

2. Description of the Related Art Conventionally, the same AC / D with a common DC output has been used as an AC / DC redundant power supply used for an external storage device or the like in an information processing device such as a computer.
A device equipped with a plurality of C power supplies is used. As a result, AC /
A method of reducing the cost of a power supply device used in an information processing device such as a computer by adjusting and using the number of AC / DC power supply devices mounted on a DC redundant power supply device has been adopted. .

However, such conventional AC / D
When the AC power is turned on to the C redundant power supply, each AC mounted on the AC / DC redundant power supply is simultaneously turned on when the AC power is turned on.
/ DC power supplies are turned on all at once, especially when the load capacity of an external storage device or the like is large (for example, having a large capacitance or inductance). The large sum of the inrush currents that flow is large, a large amount of current flows through the AC / DC redundant power supply device on the power supply side, and the burden on the power supply side increases. When a regulator is used, a large inrush current flows, the primary power supply of the system fluctuates, and the fuse on the primary side is blown.
For example, there is a problem that power cannot be turned on for some distribution boards having a large distribution board capacity.

As a method for solving such a problem (power-on sequence control method), for example, Japanese Patent Application Laid-Open No. 57-16 / 1982
There is one disclosed in Japanese Patent No. 2916 (Cited Example 1).

In the cited reference 1, a timer circuit having a sub-switch is inserted between a power supply having a main switch and a plurality of child devices (loads) connected in parallel to the power supply. ing. Each timer circuit starts a measurement operation when the main switch is turned on and DC power is applied from the power supply device, and when a predetermined time set in each timer circuit elapses, each sub-switch is activated. Turn on and the slave device (load) at the subsequent stage
Is supplied with DC power.

[0006] Thus, each slave device (load) has a predetermined time (timer value) preset in each timer circuit.
, The power is sequentially turned on at the optimum timing. Therefore, power is not supplied to all the slave devices (loads) at the same time, and the inrush current of each slave device (load) can be dispersed. Can be solved.

However, this method is a control method for DC power supply, cannot be used as it is as a control method for AC power supply, and has a different timer value in each timer circuit. In addition, there is a problem that the present invention cannot be applied to an AC / DC redundant power supply device having a common DC output and mounting a plurality of the same AC / DC power supply devices.

[0008]

As described above, according to the above-mentioned prior art, when an AC power is supplied to the power supply side (AC / DC redundant power supply), the AC / DC power is supplied simultaneously. Each AC / DC mounted on redundant power supply
Power is supplied to the power supply unit all at once, and especially when the load of the external storage device is large, the individual AC / D
The total sum of the inrush currents generated in the C power supply increases, a large amount of current flows through the AC / DC redundant power supply on the power supply side, and the load on the AC / DC redundant power supply increases, and the system primary power supply And the primary side fuse and the like are blown.

Therefore, an object of the present invention is to provide a power supply side (A
When the AC power is supplied to the C / DC redundant power supply, a large amount of current is prevented from flowing to the power supply side, whereby the capacity of the uninterruptible power supply and the capacity of the circuit breaker required for the power supply side equipment are prevented. It is an object of the present invention to provide a sequentially supplied power supply (AC / DC redundant power supply) in which operability, productivity, and maintainability are reduced while reducing the power consumption.

[0010]

In order to achieve the above object, a sequential power supply device of the present invention, when supplying power to a load having a predetermined power supply capacity, uses power from a power supply source to supply power to a load having a predetermined power supply capacity. What is claimed is: 1. A power supply device for sequentially supplying power to a load via a plurality of identical power supply circuits having a small capacity, wherein power from said power supply source is provided in a predetermined form inside said plurality of identical power supply circuits. A main power supply unit that supplies the load to the main power supply, a switch unit that opens and closes a power supply path from the power supply source to the main power supply unit, a switch drive unit that drives the switch unit to open and close, A sequential input control unit that determines the order of power supply to the load and counts the number of power-on from the power supply source; and an ID set unit that stores the setting of the power supply order determined by the sequential input control unit. , Switch signal input means for inputting a switch signal supplied from a condition switch for selecting one of the order set by the sequential input control unit and the order stored in the ID set unit. The ID set unit, based on the switch signal, according to one of the order set by the sequential input control unit or the order stored in the ID set unit, for each predetermined delay time, sequentially, A timing signal for supplying power to the load is output to the switch driving unit.

As described above, according to the present invention, a timer is provided before each main power supply in a plurality of the same power supply circuits, and the power supply circuit itself automatically recognizes and sets the timer value. , The power supply time (timing) is sequentially delayed with respect to the load, so that a plurality of identical power supply circuits can be made redundant, and the rush current at the time of power supply can be reduced. Operability, productivity, and maintainability of a sequential power supply device configured by mounting a plurality of the same power supply circuits can be improved.

[0012]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a sequential power supply device according to the present invention.

[0014] The sequential power supply device of the present invention (conventional AC /
As shown in FIG. 1, a DC redundant power supply includes a plurality of sequentially supplied power supply circuits (conventional AC / DC power supply circuits) 1-1 and 1--1.
2, 1-3,..., 1-n (n is an integer having an upper limit of 2 or more; hereinafter, simply referred to as an integer of 2 or more). AC power is supplied from an AC power supply unit (not shown) to each of the sequentially applied power supply circuits (each of the sequentially applied power supply units), and a predetermined output power is output from each of the sequentially applied power supply circuits. .

An output signal -1 is output from the sequential power supply circuit 1-1 to the terminal 11, and each of the other sequential power supply circuits constituting the sequential power supply unit is connected to the terminal 11 via the terminal 11. Is supplied with a condition signal -1.

Similarly, sequentially from the power supply circuit 1-2,
An output signal -2 is output to the terminal 12, and a condition signal -2 is supplied to each of the other sequentially applied power supply circuits constituting the sequentially applied power supply device via the terminal 12, and the sequentially applied power supply circuit From 1-3, an output signal -3 is output to a terminal 13, and via this terminal 13, a condition signal -3 is supplied to each of the sequentially applied power supply circuits constituting the sequentially applied power supply device. From the power supply circuit 1-n (n is an integer of 2 or more).
Output signal -n is output to this terminal 1
4, a condition signal -n is supplied to each of the other sequentially applied power supply circuits constituting the sequentially applied power supply device.

Further, the power supply circuits 1-1,1-
A switch signal SW is supplied to 2, 1-3,..., 1-n in common to the respective sequentially applied power supply circuits from a condition switch (not shown).

FIG. 2 is a block diagram showing a configuration of each of the sequentially applied power supply circuits.

The sequential power supply circuit 1-n shown in FIG. 2 transmits and shuts off the supplied AC power to the main power supply unit 3 at the subsequent stage, and detects that the AC power has been supplied. An auxiliary power supply unit 4 for outputting a detection signal -n, a switch driving unit 7 for controlling ON / OFF of the switch unit 2, an AC detection signal -n, a switch signal SW, and condition signals -1, -2, -3 , ~,-(N-
From 1), the output timing of the output power of the self (sequentially applied power supply circuit) is calculated to output a timing signal -n.
An output signal -n is output (supplied) to the setting unit 6,
A sequence input control unit 5 for sequentially counting the number of power-on operations of the power supply device from the AC detection signal-n;
and an ID setting unit 6 that controls the switch driving unit 7 based on n. Incidentally, all the sequentially applied power supply circuits have the same configuration. Further, the switch unit 2 may be provided at a stage subsequent to the main power supply unit 3.

Next, the operation of the thus-configured sequential power supply device of the present invention will be described.

FIG. 3 is a timing chart for explaining the operation of the sequential power supply device of the present invention.

When AC power is simultaneously supplied to each of the sequentially supplied power supply circuits 1-n from an AC power supply unit (not shown), the auxiliary power supply unit 4 starts operating. That is, when the auxiliary power supply unit 4 receives the supply of the AC power, the auxiliary power supply unit 4 performs a predetermined initial process (for example, a self-diagnosis process) and waits for the operation to stabilize. It is supplied to the section 5 and the ID setting section 6. The ID setting unit 6 supplies a signal -n to the switch driving unit 7 based on the AC detection signal -n or a timing signal -n supplied from the sequence input control unit 5 described below, and the switch driving unit 7
Outputs the signal -n to the switch unit 2 based on the signal -n, and controls on / off of the switch unit 2, thereby controlling the output timing of the output power from each of the power-on circuits 1-n. I do.

On the other hand, when the state of the switch signal SW is “L” level, the sequence input control unit 5 supplied with the AC detection signal −n outputs the output order (timing) of the output power in each of the sequential power supply circuits. Is performed, and a timing signal −n is supplied to the ID setting unit 6 based on the result. At this time, each ID
The set unit 6 receives the AC detection signal -n ("H").
(At the H level) and the timing at which the timing signal −n is supplied (at the “H” level).

When the state of the switch signal SW is at the "H" level, the processing (operation) for determining the output order (timing) of the output power in each of the sequentially applied power supply circuits is not performed, but is determined in the past. The timing signal -n is supplied from the ID setting unit 6 to the switch driving unit 7 based on the output order (the time difference stored in each ID setting unit 6).

As described above, the state of the switch signal SW is set by a condition switch (not shown) provided in the sequential power supply device according to the present invention.
For example, when the condition switch is ON, the state of the switch signal SW is set to “L” level at the time of the first power-on, and once the power is turned on, the switch signal SW is turned on. The state is set to “H” level. On the other hand, when the condition switch is off, the state of the switch signal SW is set to be always at the “L” level.

In addition to the above, the state of the switch signal SW can be set manually by manually turning on / off a condition switch (not shown) provided in the sequential power supply device of the present invention. In the sequentially supplied power supply device having the same configuration (the number of sequentially supplied power supply circuits is the same), the state of the switch signal SW is set to “H” level to change the load or to sequentially configure the sequentially supplied power supply device. If the supplied power supply devices are not sequentially the same configuration due to the increase or decrease of the supplied power supply circuit, the state of the switch signal SW may be set to be “L” level.

Next, when the state of the switch signal SW is at the "L" level, the operation of the sequence input control unit 5, ie,
A processing (arithmetic) operation for determining the output order (timing) of the output power in each of the sequentially applied power supply circuits will be described with reference to FIGS. 1, 2, and 3. FIG.

Now, each sequentially applied power supply circuit 1-n (n is 2
Assuming that AC power is supplied from an AC power supply unit (not shown) at a timing A in FIG. 3 to the auxiliary power supply unit 4 of each of the sequentially applied power supply circuits 1-n.
C power is supplied. However, the auxiliary power supply unit 4 of each of the sequentially supplied power supply circuits 1-n responds to the response of the auxiliary power supply unit 4 of each of the sequentially supplied power supply circuits 1-n due to variations in elements of circuit components constituting the auxiliary power supply unit 4. A difference occurs in the time, and the rise time of the auxiliary power supply unit 4 (timing at which the AC detection signal -n in FIG. 3 rises) differs.

FIG. 3 shows an example. FIG.
In the example of FIG. 3, the timing a of the rising edge of the AC detection signal-1, the timing b of the rising edge of the AC detection signal-3, the timing c of the rising edge of the AC detection signal-2, and the timing of the rising edge of the AC detection signal-n in FIG. As can be seen from d, the rise of the auxiliary power supply unit 4 of each sequentially applied power supply circuit is the earliest at which the auxiliary power supply unit 4 of the sequentially applied power supply circuit 1-1 rises, and subsequently, the auxiliary power supply circuit 1-3 of the sequentially applied power supply circuit 1-3 rises. Power supply unit 4, auxiliary power supply unit 4 of sequential power supply circuit 1-2, auxiliary power supply unit 4 of sequential power supply circuit 1-n
It is in order.

Each of the sequential input control units 5 of each of the sequentially input power supply circuits 1-n, based on each of the rising timings a, b, c, and d of the AC detection signal -n, controls each of the sequential input power supply circuits. Output power output sequence (timing)
Is determined. That is, as described above, the sequence input control unit 5 of each of the sequentially input power supply circuits 1-n outputs the inverted output signal -n of the AC detection signal -n (condition signal) −n) is supplied (input) (only when the state of the switch signal SW is “L” level). Therefore, in each sequence input control unit 5, when all the sequence input control units 5 from 1 to n including itself start up, the order of the rise of each auxiliary power supply unit 4 in each sequential input power supply circuit 1-n is changed. It will be detected (determined).

Thus, the order input control unit 5 can, for example, turn on each auxiliary power supply unit 4 (start the power supply) or start the control by each order input control unit 5 (each order input control unit). The output order (timing) of the output power in each of the power-on circuits can be determined based on the order in which the control unit 5 starts outputting the output signal -n).

That is, in the case of FIG. 3 (when the output order is followed), the sequentially applied power supply circuit 1-1, the sequentially applied power supply circuit 1-3, the sequentially applied power supply circuit 1-2, and the sequentially applied power supply Output power is sequentially output in the order of the circuit 1-n.
In this case, the order input control unit 5 determines the output order (timing) of the output power in each of the sequentially input power supply circuits.
Needless to say, it is necessary to know in advance the number (value of n) of each sequentially supplied power supply circuit mounted on the sequentially supplied power supply device (having it as data).

Next, when the output sequence (timing) of the output power in each of the sequentially applied power supply circuits constituting the sequentially applied power supply device of the present invention is determined as described above, the output power of each sequentially applied power supply circuit is determined. (Operation of each main power supply unit 3 in each sequentially supplied power supply circuit) until the output operation is performed will be described.

By the way, each of the aforementioned sequentially applied power supply circuits 1-
In the process of detecting the order of the rise of each auxiliary power supply unit 4 at n, the inside of each sequence input control unit 5 counts the inverted output signal -n (condition signal -n) of the AC detection signal -n, The COUNT signal is generated as shown in FIG. In this case, the COUNT signal transitions from the “L” level to the “H” level at a timing a when the rise of the auxiliary power supply unit 4 of the sequentially applied power supply circuit 1-1 is detected, and the auxiliary power supply circuit 1-3 is sequentially turned on. The transition from the “H” level to the “L” level occurs at the timing “b” when the rise of the power supply unit 4 is detected, and the “L” level at the timing “c” when the rise of the auxiliary power supply unit 4 of the power supply circuit 1-2 is sequentially detected. From the "H" level to the "H" level, and sequentially from the "H" level to the "L" level at timing d when the rise of the auxiliary power supply unit 4 of the power supply circuit 1-n is detected.

Accordingly, each of the power-on circuits sequentially supplies, for example, the timing of the rising or falling of the CNT signal corresponding to each of these condition signals -n (the timing of the rising of the AC detection signal -n or the rising of the output signal -n). It is possible to determine the power-on (start-up) time of the main power supply unit 3 according to the timing of falling.

That is, in the example shown in FIG.
At time t1 (timing p) from the rising timing a of the NT signal (timing p), the main power supply unit 3 of the first sequentially applied power supply circuit 1-1 is turned on (started), and (t2 + T1) time from the falling timing b of the CNT signal. Thereafter, the main power supply unit 3 of the power supply circuit 1-3 is sequentially turned on (activated), and the CU is turned on.
From the rising timing c of the NT signal (t3 + T1
× 2) The main power supply unit 3 of the power supply circuit 1-2 is sequentially turned on (started) after a lapse of time, and the power supply circuit 1 is sequentially turned on (tn + T1 × (n−1)) time after the falling timing d of the CNT signal. The n main power supply units 3 are turned on (activated). At this time, as described above, each ID setting unit 6
Is the time from when each auxiliary power supply unit 4 rises (after detecting the AC detection signal -n) to when the timing signal -n is detected, that is, time t1, time t2 + T1, time t3 + T1 × 2, and time tn + T1. × (n-1) are stored.

The time t1 (time from the timing a to the timing p) is, for example, the auxiliary power supply of the sequentially turned on power supply circuit which last rises from the rising timing of the auxiliary power supply section 4 of the sequentially turned on power supply circuit which started first. A time slightly longer than the difference (time) between the rising timings of the unit 4, that is, a time sufficient for the sequence input control unit of each sequentially supplied power supply circuit to detect the rising order of each sequentially supplied power supply circuit ( For example, about 1.5 times).

By the way, since each sequentially applied power supply circuit detects (calculates) the order of rise of each sequentially applied power supply circuit by the same algorithm, a common t1 value (time) is obtained. Thereby, the t2 (time from timing b to timing p), the t3 (time from timing c to timing p), and the t2
n (time from timing d to timing p) is a time from timing a to timing b, a time from timing a to timing c, respectively, from the time t1.
It can be obtained by subtracting the time from timing a to timing d.

The time T1 is set to a time required for substantially eliminating the influence (transient phenomenon) of an inrush current or the like generated by the activation of one sequentially supplied power supply circuit. This value is stored (stored) as data common to the circuits.

In this way, the n power-on circuits sequentially start up, and the power sufficient for the load capacity required by the load to be supplied with power is supplied to the uninterruptible power supply capacity required for the equipment on the power supply side and cutoff. The capacity of the machine can be supplied without being increased by the influence of an inrush current or the like.

The operation of the sequence input controller 5 when the state of the switch signal SW is "L" level has been described above. Next, the operation of the sequence input controller 5 when the state of the switch signal SW is "H" level will be described. The operation of the control unit 5 will be described.

Now, each of the sequentially applied power supply circuits 1-n (n is 2
Assuming that AC power is supplied from an AC power supply unit (not shown) at timing B in FIG. 3, AC power is supplied to the auxiliary power supply unit 4 of each of the power-on circuits 1-n. You.

At this time, in the same manner as described above, the auxiliary power supply section 4 of each of the sequentially applied power supply circuits 1-n is connected to each of the sequentially applied power supply circuits 1-n due to variations in elements of the circuit components constituting the auxiliary power supply section 4. A difference occurs in the response time of each of the n auxiliary power supply units 4, and the rise time of the auxiliary power supply unit 4 (the rising timing of the AC detection signal-n in FIG. 3) differs.

In the example of FIG. 3, the AC detection signal-1 of FIG.
Rises at timing a ', and the AC detection signal -3
Rises at the timing b ′ and the AC detection signal −2
Rises at timing c ′, and the AC detection signal −n
Rise at timing d '.

As a result, in the example shown in FIG. 3, the sequential power supply circuit 1-1 starts the time t1 stored in the ID setting section 6 after the rising timing a 'of the AC detection signal-1 (timing p). The main power supply unit 3 is turned on (started) by the timing signal -n being output from the ID setting unit 6 to the switch driving unit 7 in (1), and the power supply circuit 1-3 is sequentially turned on and the AC detection signal -3 rises. From the timing b ′ of the time (t) stored in the ID setting unit 6.
2 + T1) After the timing signal −n is output from the ID setting unit 6 to the switch driving unit 7, the main power supply unit 3 is turned on (started up).
From the rising timing c ′ of the C detection signal-2,
After the time (t3 + T1 × 2) stored in the ID setting section 6, the timing signal -n is output from the ID setting section 6 to the switch driving section 7, so that the main power supply section 3 is turned on (started), and the power supply circuit is turned on sequentially. 1-n corresponds to the time (tn + T1 × (n-1)) stored in the ID setting unit 6 after the rising timing d 'of the AC detection signal -n.
The timing signal from the setting unit 6 to the switch driving unit 7
By outputting n, the main power supply unit 3 is turned on (activated).

It should be noted that the ID setting section 6 outputs the switch signal S
Whether the state of W is at the “H” or “L” level can be detected (determined) from the state of the output signal −n supplied from the sequence input control unit 5. For example, at the timing when each ID set unit 6 detects that the auxiliary power supply unit 4 has risen by the AC detection signal -n, if the output signal -n is at "H" level, the state of the switch signal SW is "L". And if the output signal -n is at "L" level, the state of the switch signal SW is "H".
The level can be determined (see FIG. 3).

By the way, at the time t1 (time from timing a 'to timing p'), when the state of the switch signal SW is at the "H" level, the detection (operation) processing of the rising order of the sequentially applied power supply circuits is performed. Is not performed, so that it may be set shorter than the case where the state of the switch signal SW described above is at the “L” level.

In this way, the n power-on circuits sequentially start up, and the power required for the load to be supplied with power is reduced to the uninterruptible power supply capacity required for the power supply-side equipment and the interruption. The capacity of the machine can be supplied without being increased by the influence of an inrush current or the like.

In addition, when the sequentially supplied power supply circuit (unit) is replaced or increased / decreased during maintenance and inspection of the sequentially supplied power supply device, the condition switch is switched, and the switch signal S is output.
By operating the state of W, it is possible to efficiently perform the maintenance and inspection of the power supply device sequentially turned on.

[0050]

As described above, according to the sequential power-on power supply (AC / DC redundant power supply) used in the external storage device or the like of the computer system of the present invention, the rush current at the time of power-on of the system is reduced. This allows an uninterruptible power supply (UPS:
It is possible to reduce the capacity of the uninterruptible power supply) and the capacity of the circuit breaker of the power supply side equipment, thereby improving operability, productivity, and maintainability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a sequential power supply device according to the present invention.

FIG. 2 is a block diagram showing a configuration of each sequentially applied power supply circuit.

FIG. 3 is a timing chart for explaining the operation of the sequential power supply device according to the present invention.

[Explanation of symbols]

1-n Sequential power supply circuit (unit) [n: integer of 2 or more] 2 Switch unit 3 Main power supply unit 4 Auxiliary power supply unit 5 Sequence input control unit 6 ID setting unit 7 Switch driving unit 11, 12, 13, 14 terminals , -N AC power Output power -n AC detection signal -n Order input control unit output signal -n Timing signal -n ID set unit output signal -n Condition signal -n Switch drive unit output signal CNT Counter (timing) signal SW switch signal

Claims (9)

[Claims] 1. A power supply device for supplying power from a power supply source to a load having a predetermined power supply capacity through a plurality of identical power supply circuits having a small power supply capacity to the load. An order setting means for setting an order in which each of the plurality of power circuits starts supplying power to the load, and a predetermined order according to the order set by the order setting means. Means for sequentially operating the power supply circuit for each delay time. 2. A power supply device for supplying power from a power supply source to a load having a predetermined power supply capacity to the load via a plurality of identical power supply circuits having a small power supply capacity. In the power supply device, the plurality of power supply circuits, respectively, an order setting means for setting an order in which power supply to the load is started, and the order setting means, Storage means for storing the order in which each of the plurality of power supply circuits starts supplying power to the load; and selecting one of the order set by the order setting means or the order stored in the storage means A condition switch that outputs a switch signal for performing the operation, and any one of an order set by the order setting unit or an order stored in the storage unit based on the switch signal. Square accordance sequentially turned power supply device is characterized in that and a running means for sequentially operating said power supply circuit to a predetermined delay time. 3. When the condition switch is turned on, the condition switch provides a predetermined delay to the operating means in accordance with the order set by the order setting means when the power supply is first turned on. The power supply circuit is sequentially operated every time, and at the time of the second or subsequent power-on, a switch signal for sequentially operating the power supply circuit at predetermined delay times is supplied in accordance with the order stored in the storage means. When the condition switch is off, the condition switch sends a switch signal for operating the power supply circuit to the operating means sequentially at predetermined delay times in accordance with the order set by the order setting means. The power supply device according to claim 2, wherein the power supply is supplied. 4. The power supply circuit according to claim 1, wherein the power supply circuit supplies power to the load after the power supply from the power supply source to the power supply circuits starts simultaneously. 4. The sequential power supply device according to claim 1, wherein the power supply device is determined according to an order in which the power supply is enabled. 5. When power is supplied to a load having a predetermined power supply capacity, power from a power supply source is sequentially supplied to the load via a plurality of identical power supply circuits having a small power supply capacity. In the power supply unit, the power supply circuit converts a power from the power supply into a predetermined form and supplies the power to the load, and a power supply path from the power supply to the main power supply. A switch unit that opens and closes the switch unit, a switch drive unit that drives the opening and closing of the switch unit, and a sequential input control unit that determines the order of power supply to the load and counts the number of power-on from the power supply source. A timing for supplying power to the load sequentially at predetermined delay times in accordance with the power supply order while storing the setting of the power supply order determined by the sequential input control unit; Signals sequentially turned power supply device is characterized in that and a ID setting section for outputting to the switch driver. 6. When supplying power to a load having a predetermined power supply capacity, power from a power supply source is sequentially supplied to the load via a plurality of identical power supply circuits having a small power supply capacity. In the power supply unit, the power supply circuit converts a power from the power supply into a predetermined form and supplies the power to the load, and a power supply path from the power supply to the main power supply. A switch unit that opens and closes the switch unit, a switch drive unit that drives the opening and closing of the switch unit, and a sequential input control unit that determines the order of power supply to the load and counts the number of power-on from the power supply source. An ID set unit for storing the setting of the power supply order determined by the sequential input control unit; and one of the order set by the sequential input control unit or the order stored in the ID set unit. And a switch signal input means for inputting a switch signal supplied from a condition switch for selecting one of the two. The ID setting unit is configured to execute the order set by the sequential closing control unit based on the switch signal. , Or sequentially outputs a timing signal for supplying power to the load to the switch driving unit at predetermined delay times in accordance with one of the order stored in the ID set unit. A sequential power supply device characterized in that: 7. The ID set section, when the switch signal is at a high level, outputs a timing signal for supplying power to the load in accordance with an order set by the sequential input control section. And outputting a timing signal for supplying power to the load to the switch driving unit in accordance with the order stored in the ID setting unit when the switch signal is at a low level. The power supply according to claim 6, wherein the power is supplied. 8. A method for determining the order of power supply to the load, comprising: starting power supply from the power supply source to each of the power supply circuits at once; 8. The power supply device according to claim 5, wherein the power supply is determined by the order in which the operations are started. 9. The system according to claim 1, wherein the predetermined delay time is a time required for substantially eliminating the influence of an inrush current or the like generated when the power supply circuit starts operating.
8. The sequential power supply device according to any one of 8 above.