JP2006195663A - Power control system and device, power supply device, and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power control system that realizes a function of deterring a power supply start or power input if the supply power of mounted power supply devices falls short of the power consumption of mounted load devices, with fewer wiring and terminal increases, for example, in an apparatus in which a plurality of load devices are powered by a plurality of power supply devices. <P>SOLUTION: A power control device 300 comprises a signal line 720 and a drive circuit for connecting connection detection resistors 201 to 221 of respective load devices, a signal line 710 and a drive circuit for connecting connection detection resistors 101 to 121 of respective power supply devices, a power supply detector 320 for comparing electric potentials on the signal lines 710 and 720 to detect in advance that the total supply power of mounted power supply devices falls short of the total power consumption of mounted load devices, and a power supply start controller 330 for receiving a start command from a power supply start command device 310 and, if the detected output is short, deterring the start command to the power supply devices 200 to 220. The connection detection resistors of the power supply devices/load devices are set at a conductance corresponding to the supply/consumed power. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power control method and apparatus, a power supply apparatus, and an electronic apparatus, and in particular, a power supply to a variable number of electronic apparatuses mounted in a casing is collectively included in a variable number of power supply apparatuses mounted in the casing. The present invention relates to a power supply control method and apparatus for a system to be supplied, a power supply apparatus, and an electronic apparatus.

  Conventionally, a device that can mount only one device in a single housing or a stand-alone server that can mount only a fixed load device has been used.

  However, by standardizing the rack that houses the chassis and sharing the power supply among multiple servers, a blade server that can realize a large-scale server construction at low cost, and multiple communication cards are accommodated in a single chassis In recent years, frequent use of communication device housings has become popular.

  In a load device mounted on a single housing, a communication means between the load devices and a connection detection signal for detecting whether or not the load device is mounted are wired on a backplane of the housing.

  As an example similar to the above, an example is disclosed in which the types of load devices (boards) mounted are represented by a plurality of terminals and collected in a control unit by backplane wiring (see Patent Document 1).

JP-A-9-204240 (FIG. 4)

  In the server apparatus and system as described above, a method is adopted in which operating power of a plurality of load devices is collected and supplied by a plurality of power supply devices. When starting the operation after making a configuration change such as disconnecting or unloading the load device, the power activation may be instructed in a mounting state where the power supply is insufficient.

  For this reason, there is a problem that not only causes trouble but also adversely affects the apparatus and the system.

  Here, it is necessary to ascertain the mounting status of the load device and power supply device. However, with the conventional connection detection signal wiring, the number of backplane wires increases and the size of the connector from each load device increases, resulting in cost reduction. There is a problem of becoming high.

  An object of the present invention is to provide a power supply control method and apparatus, a power supply apparatus, and an electronic apparatus that solve the above-described problems.

  In the first power supply control method of the present invention, the power supplied to the variable number of load devices mounted on the housing is collectively supplied by the variable number of power devices mounted on the housing, and the power supplied to each power supply device is supplied. Is a power control method for a system that requires the mounting of more power supply devices than the number of mounted load devices, and is mounted with means for generating a first potential corresponding to the number of mounted power supply devices. The means for generating the second potential corresponding to the number of the load devices, the first potential and the second potential are compared, and whether the number of the mounted power supply devices is equal to or greater than the number of the load devices mounted. A means for detecting in advance and a start control means for issuing / suppressing a start instruction to the power supply device according to the detection result above / less than when the power start instruction is received.

  According to a second power supply control system of the present invention, in the first power supply control system, means for generating the first potential is provided in the power supply apparatus to indicate that the apparatus is connected to a backplane. The load detecting device includes a connection detection resistor, a power supply device connection signal for connecting them with a backplane, and a means for driving the connection device. The device for generating the second potential is provided in the load device, and the device is connected to the backplane. A load device connection detection resistor indicating that the load has been made, a load device connection signal for connecting them with the backplane, and means for driving the load device connection signal.

  The third power supply control method of the present invention is a power supply control method for a system in which power to a variable number of load devices mounted on a casing is collectively supplied by a variable number of power supply devices mounted on the casing. Means for generating a first potential corresponding to the total supply power of the mounted power supply device, means for generating a second potential corresponding to the total power consumption of the mounted load device, and a first potential. And a second potential, a means for detecting in advance whether or not the total supply power of the mounted power supply device satisfies the total power consumption of the mounted load device, and a power activation instruction, the detection result Activation control means for issuing / suppressing activation instructions to the power supply device in accordance with satisfaction / insufficiency of

  According to a fourth power supply control system of the present invention, in the third power supply control system, the means for generating the first potential is provided in the power supply apparatus and indicates that the apparatus is connected to a backplane. The load detection device includes a connection detection resistor, a power supply device connection signal for connecting them with the backplane, and a means for driving the connection detection resistor, and the device for generating the second potential is provided in the backplane. A load device connection detection resistor indicating that the power supply device connection detection resistor is connected, and a load device connection signal for connecting the load device connection signal to the backplane, and a means for driving the load device connection detection resistor. The value corresponding to the supplied power is set, and the conductance of the load device connection detection resistor is set to a value corresponding to the power consumption of the device.

  According to a fifth power supply control method of the present invention, in the second or fourth power supply control method, means for driving the power supply device connection signal includes a resistor between a power supply for power supply control and the power supply device connection signal, and a power supply device. A means for connecting the connection signal and the ground and driving the load device connection signal is constituted by a resistance between the power control power source and the load device connection signal, and a resistance between the load device connection signal and the ground.

  According to the sixth power control method of the present invention, the power supplied to the variable number of load devices mounted on the housing is collectively supplied by the variable number of power devices mounted on the housing, and the power supplied to each power supply device is supplied. Is a power control method for a system that requires the mounting of more power supply devices than the number of mounted load devices, and is mounted with means for generating a first potential corresponding to the number of mounted power supply devices. Means for generating a second potential corresponding to the number of load devices, the load device compares the first potential with the second potential, and the number of mounted power supply devices is mounted. Means for detecting in advance whether or not the number of devices is greater, means for instructing power activation of the own device, and power supply instruction to the load unit of the own device upon receiving the power activation instruction And individual activation control means for issuing / suppressing instructions.

  The seventh power control method of the present invention shows that, in the sixth power control method, means for generating the first potential is provided in each power supply device and the device is connected to a backplane. A power supply device connection detection resistor, a power supply device connection signal provided on the backplane for connecting each of the power supply device connection detection resistors and a means for driving the power supply device connection signal, and means for generating the second potential, A load device connection detection resistor that is provided in each load device and indicates that the device is connected to the backplane; a load device connection signal that is provided on the backplane and connects the load device connection detection resistor; and drives the load device connection detection resistor Means.

  The eighth power control method of the present invention is a power control method for a system in which power to a variable number of load devices mounted on a housing is supplied collectively by a variable number of power devices mounted on the housing. Means for generating a first potential corresponding to the total supply power of the mounted power supply apparatus, means for generating a second potential corresponding to the total power consumption of the mounted load apparatus, and the load apparatus Means for comparing the first potential with the second potential and detecting in advance whether or not the total supply power of the mounted power supply device satisfies the total power consumption of the mounted load device; And a separate activation control unit that issues / suppresses an instruction to supply power to the load unit of the device in response to satisfaction / insufficiency of the detection result when receiving a power activation instruction.

  According to a ninth power control method of the present invention, in the eighth power control method, the means for generating the first potential is provided in each power supply device and the device is connected to a backplane. A power supply device connection detection resistor, a power supply device connection signal provided on the backplane for connecting each of the power supply device connection detection resistors and a means for driving the power supply device connection signal, and means for generating the second potential, A load device connection detection resistor that is provided in each load device and indicates that the device is connected to the backplane; a load device connection signal that is provided on the backplane and connects the load device connection detection resistor; and drives the load device connection detection resistor And the conductance of the power supply device connection detection resistor is set to a value corresponding to the power supplied to the power supply device, and the conductance of the load device connection detection resistor is It is set to a value corresponding to the power consumption of the load device.

  According to a tenth power supply control system of the present invention, in the seventh or ninth power supply control system, the means for driving the power supply apparatus connection signal includes a resistor between the power supply for power supply control and the power supply apparatus connection signal, and a power supply apparatus. A means for connecting the connection signal and the ground and driving the load device connection signal is constituted by a resistance between the power control power source and the load device connection signal, and a resistance between the load device connection signal and the ground.

  The first power supply control device according to the present invention supplies power to a variable number of load devices mounted in a housing collectively by the variable number of power devices mounted in the housing, and the mounted variable number of power devices. The power supply devices of the power supply apparatus have the same power supply, and the power supply control apparatus of the system requires mounting more power supply apparatuses than the load apparatus. The first power supply apparatus corresponds to the number of power supply apparatuses mounted. The means for generating the potential, the means for generating the second potential corresponding to the number of mounted load devices, the first potential and the second potential are compared, and the number of mounted power supply devices is mounted. Means for detecting in advance whether the number of load devices is equal to or greater than the number of load devices, and activation control means for issuing / suppressing activation instructions to the power supply devices when receiving a power activation instruction in response to the detection result above / less than.

  According to a second power supply control device of the present invention, in the first power supply control device, the means for generating the first potential is driven by a power supply device connection signal for connecting a connection detection terminal of each power supply device. The means for generating the second potential is constituted by a load device connection signal for connecting a connection detection terminal of each load device and a means for driving the load device connection signal.

  A third power supply control device according to the present invention is a power supply control device for a system that collectively supplies power to a variable number of load devices mounted on a housing by a variable number of power supply devices mounted on the housing. And means for generating a first potential corresponding to the total supply power of the mounted power supply apparatus; means for generating a second potential corresponding to the total power consumption of the mounted load apparatus; A means for comparing the potential with the second potential and detecting in advance whether the total power supplied by the mounted power supply device satisfies the total power consumption of the mounted load device; And activation control means for issuing / suppressing an activation instruction to the power supply device in accordance with satisfaction / insufficiency of the result.

  According to a fourth power supply control device of the present invention, in the third power supply control device, the means for generating the first potential is connected to a connection detection terminal of each power supply device having conductance equivalent to output power. A load signal connected to a connection detection terminal of each load device having a conductance equivalent to power consumption; And driving means.

  According to a fifth power supply control device of the present invention, in the second or fourth power supply control device, the means for driving the power supply device connection signal includes a resistor between the power supply for power control and the power supply device connection signal, and a power supply device. A means for connecting the connection signal and the ground and driving the load device connection signal is constituted by a resistance between the power control power source and the load device connection signal, and a resistance between the load device connection signal and the ground.

  In the power supply device of the present invention, the other end of the resistor connected to the ground is connected to one of a terminal or a contact to the backplane to serve as a connection detection terminal, and the conductance of the resistor is set to a value corresponding to the supplied power.

  A first electronic device of the present invention is an electronic device that receives an operating power supply from the outside and becomes a load of the power supply device, and the other end of the resistor connected to the ground is used as one of terminals or contacts to the backplane. Connection is made as a connection detection terminal, and the conductance of the resistor is set to a value corresponding to power consumption.

  The second electronic device of the present invention is an electronic device that receives an operating power supply from the outside and becomes a load of the power supply device, and the other end of the resistor connected to the ground is used as one of terminals or contacts to the backplane. A second potential corresponding to the total power consumption of the electronic device mounted on the housing and serving as a load is received by the connected connection detection terminal and the first potential corresponding to the total supply power of the power supply device mounted on the housing. Is received through the connection detection terminal, the received first potential is compared with the second potential, and the total supply power of the power supply device mounted on the housing is the total power consumption of the electronic device mounted on the housing. A means for detecting whether or not the device is satisfied in advance, a means for instructing power-on of the own device, and a power-up instruction, and issuing a power supply instruction to the load unit of the own device in response to satisfaction / insufficiency of the detection result / With individual activation control means to suppress, The conductance of the serial resistor to a value corresponding to the power consumption of the apparatus.

  According to the present invention, the operating power of a plurality of load devices with a variable number of mountings is collected and supplied when a plurality of power supply devices with a variable number of mountings are supplied in parallel operation and operated by changing the configuration. There is a first effect of preventing the power supply device from being activated in a mounting state where power is insufficient.

  A plurality of connection confirmation signals that are conventionally connected from the load devices and the power supply device on the backplane are each a single signal, so the second effect is that the number of signal lines on the backplane is greatly reduced. is there.

  Next, in the past, the number of connected devices was calculated from the connection detection signals of each load device and power supply device from the backplane, and power supply activation permission / suppression was realized by software. In particular, the number of connected load devices and power supply devices is determined, and the activation and permission of the power supply is realized.

  A third effect is that processing by software can be deleted.

  Further, in the present invention, it becomes possible to determine the power consumption / supply power by each one connection signal, and by eliminating the power consumption and supply power information acquisition processing, it is possible to reduce processing by software, Since there is no need to mount unnecessary communication signals on the backplane or the like, there is a fourth effect that the cost is reduced.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  The configuration of the first embodiment of the present invention will be described with reference to FIG.

  A plurality of power supply devices 100, 110, and 120 that supply power to the load device, a plurality of load devices 200, 210, and 220 that operate by receiving power supply, and activation of power supply from the power supply devices 100, 110, and 120 A power supply control device 300 that controls the stop, a power supply bus 400 that supplies power from the power supply devices 100, 110, 120 to the load devices 200, 210, 220, a power supply device 100, 110, 120 and a load device 200, 210, A system is configured by a casing 500 on which a backplane to which 220 is connected is mounted.

  The load device is a power supply destination and a load-side device. For example, a processing device, a storage device, a communication device, a printing device, or the like.

  The power supply devices 100, 110, and 120 have a function of supplying power to the load devices 200, 210, and 220 through the power supply bus 400, and a power supply device connection detection resistor that indicates that each is connected to the backplane 600 (mounted) 101, 111, and 121 are comprised.

  The load devices 200, 210, and 220 are configured to include various processing functions and the like, and load device connection detection resistors 201, 211, and 221 that indicate that the load device is connected to the backplane 600.

  The backplane 600 includes a power supply device connection signal line 710 that connects the power supply device connection detection resistors 101, 111, and 121 to the power supply control device 300, and connection detection resistors 201, 211, and 221 of the load devices 200, 210, and 220. Includes a load device connection signal line 720 for connecting the power supply control device 300 to the power supply control device 300.

  The mounted power supply device is operated in parallel to supply power to the mounted load device.

  The power supply control device 300 includes voltage dividing resistors RpH341 and RpL342 for determining a reference voltage for the power supply device connection signal line 710, voltage dividing resistors RcH351 and RcL352 for determining a reference voltage for the load device connection signal line 720, The power supply detector 320 includes a power supply detector 320 that compares the potentials of the power supply device connection signal line 710 and the load device connection signal line 720 and determines permission / inhibition of activation of the power supply devices 100, 110, and 120.

  Also, a power activation instruction device 310 for instructing power activation, an activation instruction from the power activation instruction device 310, and activation permission / inhibition notification from the power supply detector 320 are issued to the power supply devices 100, 110, 120. A power activation controller 330 is also included.

  A configuration example of the power activation instruction device 310 and the power activation controller 330 is shown in FIG. The power activation instruction device 310 pulls up the input of the inverter 313 through the resistor 312 and sets the input to “0” when the button 311 is pressed down, and the output to the power activation controller 330 is “1”. Configure as follows.

  Alternatively, it can be configured as a device whose output is “1” when a power supply start instruction is given from another control device (not shown).

  The power activation controller 330 outputs “1” to each of the power devices 100, 110, 120 when the output from the power activation instruction device 310 is “1” and the output from the power supply detector 320 is “1”. An AND gate can be used.

  Next, the operation of the first embodiment for carrying out the present invention will be described with reference to the drawings.

  The operation of the present invention will be described with reference to FIG.

  Each of the power supply device and the load device is mounted on the casing 500 within the maximum mounting number.

The power supply device has a suppliable power PSUP per unit, and the load device has a power consumption PCONSUME per unit. In order to supply sufficient power, the following (Equation 1) must be satisfied. .
Number of power supply units × PSUP> Number of load devices × PCONSUME (Formula 1)
The power supply control device 300 recognizes the number of mounted power supply devices 100, 110, and 120 and the number of load devices 200, 210, and 220, and when (Equation 1) is satisfied, allows the power supply device to start, If (Equation 1) is not satisfied, activation of the power supply device is prohibited.

  The power supply detector 320 in the power supply control device 300 uses the power supply connection signal line 710 connected to the power supply connection detection resistors 101, 111, and 121 to obtain a potential Vsupply corresponding to the number of mounted power supply devices “−”. Receive as input.

  Further, a potential Vconsume corresponding to the number of mounted load devices is received as a “+” input from the load device connection signal line 720 connected to the load device connection detection resistors 201, 211, and 221.

When satisfying (Equation 1), Vsupply <Vconsume,
The power supply device connection detection resistors 101, 111, 121, the load device connection detection resistors 201, 211, 221 and the voltage dividing resistors RcH351, RcL352, RpH341, RpL342 so that Vsupply> Vconsume when (Equation 1) is not satisfied. Is set.

The power supply detector 320 compares the "-" input Vsupply with the "+" input Vconsume,
Vsupply> Vconsume (Formula 2)
In this case, the power activation controller 330 is notified of the suppression of power activation by outputting “0”, and conversely
Vsupply <Vconsume (Formula 3)
In this case, by outputting “1” to the power activation controller 330, the power activation permission is notified.

  When power activation is instructed from the power activation instruction device 310, the power activation controller 330 activates the power devices 100, 110, 120 and supplies power when the power supply detector 320 notifies activation permission. When the detector 320 notifies the activation suppression, the power supply device is not activated.

  Vsupply generated from power supply device connection detection resistors 101, 111, 121 and voltage dividing resistors RpH, RpL, and resistances connected to load device connection detection resistors 201, 211, 221 and Vconsume generated from RcH, RcL satisfy resistance (Equation 1) The method of setting the value is shown below.

When none of the power supply devices 100, 110, 120 is connected to the backplane 600, Vcc is divided by the voltage dividing resistors RpH341, RpL342,
The “−” input of the power supply detector 320 receives the potential Vcc × RpL / (RpH + RpL).

  When the power supply device 100 is inserted, the connection detection resistor 101 is connected to the backplane, and the power supply device connection signal line 710 is connected to the ground via the connection detection resistor 101.

  The power supply device connection signal line 710 divides the potential Vcc by the resistors RpH310 and RpL342 in the power supply control device 300.

  When the connection detection resistor 101 (hereinafter Rp101) is connected, the potential of the “−” input of the power supply detector 320 decreases from Vcc × RpL / (RpH + RpL).

The combined resistance value RX101 of RpL and Rp101 is
RX101 = 1 / (1 / RpL + 1 / Rp101) = (RpL × Rp101) / (RpL + Rp101) (Formula 4)
It becomes.

The potential Vsupply (1) of the “−” input of the power supply detector 320 is
Vsupply (1) = Vcc × RX101 / (RpH + RX101) (Formula 5)
It becomes.

When N of the connection detection resistors 101, 111, 120 are connected, the resistors Rp (1), Rp (2),. . , Rp (i),. . . Assuming Rp (n), the combined resistance RX (n) with the connection detection resistance RpL is
RX (n) = 1 / (1 / RpL + Σ (1 / Rp (i))) (Equation 6)
It becomes.

  Here, Σ (1 / Rp (i)) represents the total sum of the reciprocals of the resistance values of the connected connection detection resistors.

The “−” input potential Vsupply of the power supply detector 320 when N power supply devices are connected.
(N)
Vsupply (n) = Vcc × RX (n) / (RX (n) + RpH) (Expression 7).

  Using equations (6, 7), Vcc = 5V, RpH = 20Ω, RpL = 10kΩ, and Rp (i) resistance values of 100Ω, the number of power supply devices, and the combined resistance RX (n) The value of the “−” input potential Vsupply (n) of the power supply detector 320 is shown in FIG.

  The potential Vconsume input to “+” of the power supply detector 320 when the load devices 200, 210, and 220 are connected is calculated in the same manner.

(Implementation example that satisfies the first power constraint)
If the power supply constraint is that one load device can supply power to one power supply device, Vsupply (i) when i power supply devices are connected, Vsupply (i), and j load devices are connected. If Vconsume is Vconsume (j), in order to satisfy (Equation 1), for any n from the conditions of (Equation 2) and (Equation 3),
Vconsume (n + 1) <Vsupply (n) <Vconsume (n) (Formula 8)
Should be satisfied.

  Power supply devices 100, 110 when RpH = 120Ω, RpL = 10 kΩ, power supply device connection detection resistors 101, 111, 121 = 300Ω, RcH = 100Ω, RcL = 10 kΩ, load device connection detection resistors 201, 2111, 221 = 300Ω 120, the number of load devices 200, 210 and 220, and the values of Vsupply and Vconsume are shown in FIG.

  FIG. 5 is a graph of FIG.

  The horizontal axis of FIG. 5 indicates the number of load devices, and the vertical axis indicates the potential of Vconsume or Vsupply.

The horizontal line in the figure shows the Vsupply potential when there are 1, 2, 3, and 4 power supply units, and the lower right line shows the Vconsume potential when the number of load units is 1, 2, 3, and 4 units. .
Vsupply (n) indicates Vsupply when there are n power supply units. In the case of two power supply devices, it is possible to use a number of load devices satisfying Vconsume> Vsupply (2), and it is possible to start up to two load devices from FIG.

That is, when Vsupply when n power supply devices are connected from FIG. 5 is expressed as Vsupply (n), n = 1, 2, 3, 4
Vconsume (n + 1) <Vsupply (n) <Vconsume (n) (Formula 9)
And satisfies the power supply constraint (Equation 8).

(Implementation example that satisfies the second power constraint)
Next, an embodiment in which one power supply device can supply power to two load devices will be described below with reference to FIG.

  The fact that one power supply device can supply power to two load devices means that the power supply device in the second power supply constraint is the same as the two power supply devices in the implementation example that satisfies the first power supply constraint. Equivalent power supply capability.

That is, assuming that the resistance value of the power supply connection detection resistor of the power supply device in the second power supply constraint is RR2, and the resistance value of the power supply device connection detection resistor in the first power supply constraint is RR1, the resistance value of two RR1 connected in parallel If RR2 is used, this can be realized.
That is,
RR2 = 1 / (1 / RR1 + 1 / RR1) = RR1 / 2 (Equation 10)
It becomes.

  The above can also be applied when a plurality of power supply apparatuses having different power supply capabilities are used. When the power supply device A1 that can supply power to one load device and the power supply device A2 that can supply power to two load devices coexist, the resistance value of the connection detection resistor used for the power supply device A1 is RR1, By setting the resistance value of the connection detection resistor used for the power supply device A2 capable of supplying power to the two load devices to RR2, the power supply devices A1 and A2 can be mixed.

  Further, when a power supply device capable of supplying power to K load devices is used, it is realized by setting a resistance value of connection detection resistors in which K pieces of RR1 are connected in parallel.

(Implementation example that satisfies the third power source constraint)
An embodiment in which the load device COLD is replaced with a new load device CNEW that consumes twice as much power as the load device will be described below with reference to FIG.
Since CNEW is the power consumption of two conventional load devices, RC1 is the connection detection resistance value used for the conventional load device and RC2 is the connection detection resistance value for CNEW. Can be realized by making it equivalent to the value of two connected in parallel.

That is,
RC2 = 1 / (1 / RC1 + 1 / RC1) = RC1 / 2 (Formula 11)
It becomes.

  In summary, the connection detection resistance of the load device is set to have a conductance equivalent to the power consumption (reciprocal of the resistance value), and the connection detection resistance of the power supply device is set to have a conductance equivalent to the supplied power (power that can be supplied) To do.

  Conventionally, when a load device with different power consumption or a power supply device with different supply power is installed, it is necessary to obtain power consumption of each load device and perform complicated processing. By setting the connection detection resistance of the device, even in a system in which a load device of different power consumption and a power supply device of different supply power are connected, information for determining whether to start or stop the power supply is determined by the connection detection signal. It can be obtained.

  Therefore, even when a plurality of different load devices and power supply devices coexist, it is possible to automatically realize activation permission / suppression of power supply without software intervention.

  In the example of FIG. 1, the power supply device and the load device are connected to the same backplane, but may be connected to respective backplanes.

  Further, the power supply device may be daisy connected by a cable or the like.

  In addition, the present invention can be applied even when the power supply device and the power supply control device are not the case 500 but separate cases.

  Next, the configuration of the second exemplary embodiment of the present invention will be described with reference to FIG.

  In the present embodiment, when the power supply can be activated individually for each load device, the dedicated power control device 300 is not required, the power supply amount is detected reliably and with a simple configuration, and the power supply amount is satisfied. Only the structure which supplies electric power to the load part of a load apparatus is shown.

  Each of the load devices 200 </ b> A, 210 </ b> A, and 220 </ b> A includes a power activation instruction device 310, a power supply detector 320, a power activation controller 330, and further includes a power supply 360.

  The power supply 360 controls whether to supply the power supplied from the power bus 400 to the load unit 202.

  The backplane 600A includes voltage dividing resistors 341, 342, 351, and 352 that generate an input potential to the power supply detector 320.

  After the power supply devices 100, 110, and 120 are mounted, power is supplied to the power supply bus 400 without control.

  Operating power is supplied from the power supply bus 400 to the power supply start instruction device 310, the power supply detector 320, the power supply start controller 330, and the power supply device 360 of the mounted load device.

  The operation of each device other than the power supply 360 and the power supply devices 100, 110, and 120 is the same as that of the first embodiment.

  The power supply 360 supplies power to the load unit 202 when power supply is requested from the power activation controller 330, that is, when the output of the power activation controller 330 is “1”.

  When the output of the power activation controller is “0”, power is not supplied to the load unit 202.

  In the present embodiment, it is possible to start the power supply individually for each load device, and it is not necessary to provide a dedicated power supply control device 300 outside the load device.

The figure which shows the structure of the apparatus and system containing the power supply control system in the 1st Embodiment of this invention. The figure which shows the structural example of the power activation instruction | indication apparatus 310 of FIG. The figure which shows the value of synthetic | combination resistance RX and Vsupply when the number (n) of power supply devices is 1-4. The figure which showed Vconsume when the number (n) of load apparatuses was 1-4, and also showed the value of Vsupply when the number of power supply apparatuses was 1-4 for comparison. The figure which displayed FIG. 4 in the graph. The figure for demonstrating connection detection resistance RR2 of a power supply when one power supply device can supply the power supply to two load apparatuses. The figure for demonstrating the connection detection resistance RC2 of a new load apparatus when replacing a load apparatus with the load apparatus which consumes twice electric power. The figure which shows the structure of the apparatus and system containing the power supply control system in the 2nd Embodiment of this invention.

Explanation of symbols

100, 110, 120 Power supply device 101, 111, 121 Power supply connection detection resistor 200, 200A, 210, 210A, 220, 220A Load device 201, 211, 221 Load device connection detection resistor 300 Power supply control device 310 Power supply start instruction device 320 Power supply detector 330 Power activation controller 360 Power supply 400 Power supply bus 500 Case 600, 600A Backplane 710 Power supply connection signal line 720 Load device connection signal line

Claims (18)

The variable number of power supply devices mounted on the housing collectively supply power to the variable number of load devices mounted on the housing, and the power supplied to each power supply device is the same, and is greater than the number of load devices mounted. A power supply control system for a system that requires implementation of a power supply,
Means for generating a first potential corresponding to the number of power supply devices mounted;
Means for generating a second potential corresponding to the number of mounted load devices;
Means for comparing the first potential with the second potential and detecting in advance whether the number of mounted power supply devices is equal to or greater than the number of mounted load devices;
A power supply control system comprising: a start control unit that issues / suppresses a start instruction to a power supply device when receiving a power start instruction in response to the detection result above / less than. A means for generating the first electric potential is provided in the power supply apparatus, and a power supply apparatus connection detection resistor indicating that the apparatus is connected to a backplane;
It consists of a power supply connection signal that connects them with the backplane and a means for driving it,
A load device connection detection resistor provided with means for generating the second potential in the load device and indicating that the device is connected to a backplane;
A load device connection signal connecting them on the backplane;
2. A power supply control system according to claim 1, wherein said power supply control system comprises means for driving the same. A power supply control system for a system that supplies power to a variable number of load devices mounted on a housing collectively by a variable number of power devices mounted on the housing,
Means for generating a first potential corresponding to the total supply power of the mounted power supply device;
Means for generating a second potential corresponding to the total power consumption of the mounted load device;
Means for comparing in advance the first potential and the second potential, and detecting in advance whether the total supply power of the mounted power supply device satisfies the total power consumption of the mounted load device;
A power supply control system comprising: a start control unit that issues / suppresses a start instruction to a power supply device in response to satisfaction / insufficiency of the detection result when receiving a power start instruction. A means for generating the first electric potential is provided in the power supply apparatus, and a power supply apparatus connection detection resistor indicating that the apparatus is connected to a backplane;
A power supply connection signal for connecting them with the backplane;
It consists of a means to drive this,
A load device connection detection resistor provided with means for generating the second potential in the load device and indicating that the device is connected to a backplane;
A load device connection signal for connecting them with the backplane;
It consists of a means to drive this,
The conductance of the power supply device connection detection resistor is set to a value corresponding to the power supplied by the device,
4. The power supply control system according to claim 3, wherein the conductance of the load device connection detection resistor is set to a value corresponding to the power consumption of the device. The means for driving the power supply connection signal is composed of a resistance between the power control power supply and the power supply connection signal, and a resistance between the power supply connection signal and the ground,
5. The means for driving a load device connection signal comprises a resistance between a power supply for power control and a load device connection signal, and a resistance between the load device connection signal and a ground. Power control method. The variable number of power supply devices mounted on the housing collectively supply power to the variable number of load devices mounted on the housing, and the power supplied to each power supply device is the same, and is greater than the number of load devices mounted. A power supply control system for a system that requires implementation of a power supply,
Means for generating a first potential corresponding to the number of power supply devices mounted;
Means for generating a second potential corresponding to the number of mounted load devices,
The load device is
Means for comparing the first potential with the second potential and detecting in advance whether the number of mounted power supply devices is equal to or greater than the number of mounted load devices;
Means for instructing power-on of its own device;
A power supply control system comprising: an individual start control unit that issues / suppresses a power supply instruction to the load unit of the own device when receiving a power supply start instruction according to the above / less than the detection result. A means for generating the first potential; a power supply device connection detection resistor provided in each power supply device and indicating that the device is connected to a backplane;
A power supply device connection signal provided on the backplane and connected to each of the power supply device connection detection resistors and means for driving the power supply device connection signal are configured.
A load device connection detection resistor provided in each load device, the means for generating the second potential indicating that the device is connected to a backplane;
7. The power supply control system according to claim 6, comprising a load device connection signal provided on a backplane for connecting the load device connection detection resistor and means for driving the load device connection signal. A power supply control system for a system that supplies power to a variable number of load devices mounted on a housing collectively by a variable number of power devices mounted on the housing,
Means for generating a first potential corresponding to the total supply power of the mounted power supply device;
Means for generating a second potential corresponding to the total power consumption of the mounted load device;
The load device is
Means for comparing in advance the first potential and the second potential, and detecting in advance whether the total supply power of the mounted power supply device satisfies the total power consumption of the mounted load device;
Means for instructing power-on of its own device;
A power supply control method comprising: an individual start control unit that issues / suppresses a power supply instruction to the load unit of the own device in response to satisfaction / insufficiency of the detection result when receiving a power supply start instruction. A means for generating the first potential; a power supply device connection detection resistor provided in each power supply device and indicating that the device is connected to a backplane;
A power supply device connection signal provided on the backplane and connected to each of the power supply device connection detection resistors and means for driving the power supply device connection signal are configured.
A load device connection detection resistor provided in each load device, the means for generating the second potential indicating that the device is connected to a backplane;
A load device connection signal that is provided on the backplane and connects the load device connection detection resistor, and means for driving the load device connection signal,
The conductance of the power supply device connection detection resistor is set to a value corresponding to the power supplied by the power supply device,
9. The power supply control system according to claim 8, wherein conductance of the load device connection detection resistor is set to a value corresponding to power consumption of the load device. The means for driving the power supply connection signal is composed of a resistance between the power control power supply and the power supply connection signal, and a resistance between the power supply connection signal and the ground,
The means for driving the load device connection signal is configured by a resistance between the power supply for power control and the load device connection signal, and a resistance between the load device connection signal and the ground. Power control method. The power supplied to the variable number of load devices mounted on the housing is supplied collectively by the variable number of power devices mounted on the housing, and the power supplied to each device of the mounted variable number of power devices is the same. And a power supply control device for a system that requires mounting more power supply devices than the load device,
Means for generating a first potential corresponding to the number of power supply devices mounted;
Means for generating a second potential corresponding to the number of mounted load devices;
Means for comparing the first potential with the second potential and detecting in advance whether the number of mounted power supply devices is equal to or greater than the number of mounted load devices;
A power supply control device comprising start control means for issuing / suppressing a power supply device start instruction according to the above / less than the detection result when receiving a power supply start instruction. The means for generating the first potential includes a power supply device connection signal for connecting a connection detection terminal of each power supply device,
It consists of a means to drive this,
A load device connection signal for connecting the connection detection terminal of each load device; and means for generating the second potential;
The power supply control device according to claim 11, wherein the power supply control device is configured by driving means. A power supply control device for a system that supplies power to a variable number of load devices mounted on a housing collectively from a variable number of power devices mounted on the housing,
Means for generating a first potential corresponding to the total supply power of the mounted power supply device;
Means for generating a second potential corresponding to the total power consumption of the mounted load device;
Means for comparing in advance the first potential and the second potential, and detecting in advance whether the total supply power of the mounted power supply device satisfies the total power consumption of the mounted load device;
A power supply control device comprising start control means for issuing / suppressing a power supply device start instruction in response to satisfaction / insufficiency of the detection result upon receipt of a power supply start instruction. Means for generating the first potential;
A power supply connection signal for connecting a connection detection terminal of each power supply having conductance equivalent to output power;
It consists of a means to drive this,
Means for generating the second potential;
A load device connection signal for connecting a connection detection terminal of each load device having conductance equivalent to power consumption;
14. The power supply control apparatus according to claim 13, wherein the power supply control apparatus comprises means for driving the same. The means for driving the power supply connection signal is composed of a resistance between the power control power supply and the power supply connection signal, and a resistance between the power supply connection signal and the ground,
15. The means for driving a load device connection signal comprises a resistance between a power control power supply and a load device connection signal, and a resistance between the load device connection signal and a ground. Power control device. A power supply device, wherein the other end of the resistor connected to the ground is connected to one of a terminal to the backplane or one of contacts to form a connection detection terminal, and the conductance of the resistor is set to a value corresponding to the supplied power. An electronic device that receives an operating power supply from the outside and serves as a load of the power supply device. The other end of the resistor connected to the ground is connected to one of the terminal to the backplane or one of the contacts, and is used as a connection detection terminal. An electronic device characterized in that the conductance is a value corresponding to power consumption. An electronic device that receives an operating power supply from the outside and becomes a load on the power supply device,
A connection detection terminal in which the other end of the resistor connected to the ground is connected to a terminal to the backplane or one of the contacts;
A first potential corresponding to the total supply power of the power supply device mounted on the housing is received, and a second potential corresponding to the total power consumption of the electronic device mounted on the housing and serving as a load is received through the connection detection terminal. The first potential received is compared with the second potential, and it is detected in advance whether the total power supplied by the power supply device mounted on the housing satisfies the total power consumption of the electronic device mounted on the housing. Means to
Means for instructing power-on of its own device;
An individual start control means for receiving a power start instruction and issuing / suppressing a power supply instruction to the load unit of the own device in response to satisfaction / insufficiency of the detection result;
An electronic device characterized in that conductance of the resistor is set to a value corresponding to power consumption of the device itself.

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