Power supply device

Details Power supply device Power supply device

2000-09-08

2004-11-09

Sircus, Brian (Department: 2836)

Electrical transmission or interconnection systems

Plural load circuit systems

Circuit arrangements or layouts

C307S064000

Reexamination Certificate

active

06815843

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a power supply device for supplying electric power to an information processor, such as a server, and more particularly to a power supply device in which a parallel redundancy structure is adopted.
BACKGROUND OF THE INVENTION
Recently, according to the massive spread of the Internet, high reliability and cost performance are required for an information processor, such as a server, that forms the core of the Internet. Here, the reliability and the cost of an information processor are largely influenced by the reliability of the power supply device by which electric power is supplied to the information processor. Thus, high reliability and cost performance are required also for the power supply device.
FIG. 5
is a block diagram showing the structure of a power supply
10
in the prior art. The power supply
10
shown in this drawing is mounted in an information processor (whose drawing is omitted), such as a server, converts an AC voltage source V
AC
into a DC voltage supply V
DC
, and supplies this DC voltage supply V
DC
to a load
20
. As this load
20
, a printed board circuit mounted in an information processor, a magnetic disk unit, or the like are given.
The power supply
10
is provided with n power supply units
11
1
to
11
n
. Respective these power supply units
11
1
to
11
n
are identically constituted wherein a parallel redundancy structure is adopted so that even when the DC voltage supply output of at least one power supply unit is stopped, the load
20
is not influenced by other power supply units. These power supply units
11
1
to
11
n
are inserted into plural slots provided inside the information processor, respectively, and are provided with a function by which hot-line maintenance can be executed without stopping the supply of the DC voltage supply to the load
20
.
The power supply unit
11
1
is inserted between a feeder terminal TA
1
and the load
20
, converts the AC voltage source V
AC
supplied to the feeder terminal TA
1
into a DC voltage supply V
DC1
, and supplies this DC voltage supply V
DC1
to the load
20
. In the power supply unit
11
1
, a main power supply unit
12
1
is provided with an AC/DC (Alternating Current/Direct Current) converting function and converts the AC voltage source V
AC
into the DC voltage supply V
DC1
. The main power supply unit
12
1
supplies the DC voltage supply V
DC1
to the load
20
via a power supply cable (whose drawing is omitted).
A main power supply control section
13
1
is provided in the main power supply unit
12
1
and performs an ON/OFF control of the AC/DC converting function and abnormality monitoring of the main power supply unit
12
1
. When abnormality occurs in the main power supply unit
12
1
, the main power supply control section
13
1
transmits an abnormality detection signal to a unit side control section
17
1
. A diode
14
1
is an element provided in the downstream side of the main power supply unit
12
1
and preventing a rush current from flowing in the main power supply unit
12
1
when the power supply unit
11
1
is inserted in the slot of the information processor. A control power supply unit
15
1
is inserted between the feeder terminal TA
1
and a main control section
30
and converts the AC voltage source V
AC
supplied to the feeder terminal TA
1
into a DC voltage supply V
A1
, a DC voltage supply V
B1
, and a DC voltage supply V
C1
.
The control power supply unit
15
1
supplies the DC voltage supply V
A1
to the main power supply control section
13
1
, the DC voltage supply V
B1
to the unit side control section
17
1
, and the DC voltage supply V
C1
to a DC/DC converting section
31
of the main control section
30
, respectively. That is, in the power supply units
11
1
, the control power supply unit
15
1
supplying the DC voltage supply to a control system including the main power supply control section
13
1
, the unit side control section
17
1
, and the main control section
30
(the DC/DC converting section
31
) is provided, separated from the main power supply unit
12
1
. As the control power supply unit
15
1
, the one provided with a DC/DC converting function for converting the DC voltage supply V
DC
from the main power supply unit
12
1
into a predetermined value of DC voltage supply may also be employed.
A diode
16
1
is an element provided in the downstream side of the control power supply unit
15
1
and preventing a rush current from flowing in the control power supply unit
15
1
when the power supply unit
11
1
is inserted in the slot of the information processor. The unit side control section
17
1
is connected to the main control section
30
via an interface
18
1
and works as a communication interface between the main power supply control section
13
1
and the main control section
30
.
Concretely, the unit side control section
17
1
has the function by which an ON/OFF control signal from the main control section
30
is received via the interface
18
1
and is transmitted to the main power supply control section
13
1
and the function by which an abnormality detection signal from the main power supply control section
13
1
is received and is transmitted to the main control section
30
via the interface
18
1
.
The power supply units
11
n
of the number n is inserted between a feeder terminal TA
n
and the load
20
, converts the AC voltage source V
AC
supplied to the feeder terminal TA
n
into a DC voltage supply V
DCn
and supplies this DC voltage supply V
DCn
to the load
20
. In the power supply unit
11
n
, a main power supply unit
12
n
is identically constituted with the main power supply unit l
2
1
and converts the AC voltage source V
AC
into the DC voltage supply V
DCn
. A main power supply unit
12
n
supplies the DC voltage supply V
DCn
to the load
20
via a power supply cable (whose drawing is omitted).
A main power supply control section
13
n
is provided in the main power supply unit
12
n
and performs an ON/OFF control of the AC/DC converting function and abnormality monitoring of the main power supply unit
12
n
. When abnormality occurs in the main power supply unit
12
n
, the main power supply control section
13
n
transmits an abnormality detection signal to a unit side control section
17
n
. A diode
14
n
is an element provided in the downstream side of the main power supply unit
12
n
and preventing a rush current from flowing in the main power supply unit
12
n
when the power supply unit
11
n
is inserted in the slot of the information processor. A control power supply unit
15
n
is inserted between the feeder terminal TA
n
and the main control section
30
and converts the AC voltage source V
AC
supplied to the feeder terminal TA
n
into a DC voltage supply V
An
, a DC voltage supply V
Bn
, and a DC voltage supply V
Cn
.
The control power supply unit
15
n
supplies the DC voltage supply V
An
to the main power supply control section
13
n
, the DC voltage supply V
Bn
to the unit side control section
17
n
, and the DC voltage supply V
Cn
to the DC/DC converting section
31
of the main control section
30
, respectively. That is, in the power supply units
11
n
, the control power supply unit
15
n
supplying the DC voltage supply to a control system including the main power supply control section
13
n
, the unit side control section
17
n
, and the main control section
30
(the DC/DC converting section
31
) is provided, separated from the main power supply unit
12
n
, similarly to the power supply units
11
1
.
A diode
16
n
is an element provided in the downstream side of the control power supply unit
15
n
and preventing a rush current from flowing in the control power supply unit
15
n
when the power supply unit
11
n
is inserted in the slot of the information processor. The unit side control section
17
n
is connected to the main control section
30
via an interface
18
n
and works as a communication interface between the main power supply control section
13
n
and the main control section
30
.
Concretely, t

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