JP2012010491A - Two input electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of using a power supply part of a server device on a load condition in which an efficiency always becomes high in order to reduce an electrical power of a commercial power supply when it is requested that the electrical power of the commercial power supply which becomes a burden to an electric company be reduced for the purpose of cost reduction and CO2 reduction also in the server device.SOLUTION: An electronic device comprises two input terminals and a power supply part provided with: a first power circuit connected to a first input terminal; a second power circuit connected to a second input terminal 21; a detection part connected to a load; a changeover part to change a connection state between the first power circuit and the detection part and a connection state between the second power circuit and the detection part; and a control part which changes connection states of the changeover part based on a detection result of the detection part. The object can be realized by using the electronic device and connecting a power supply device with natural-power-source conversion carried out to at least one of the first input terminal or the second input terminal.

Description

  The present invention relates to operating an electronic device in a state where power efficiency is high with respect to a commercial power source by combining the commercial power source and natural energy.

  Due to the trend of power saving on a global scale, electricity costs can be reduced by using natural energy such as wind power generation and solar power generation to allocate to some electric power used at home, and the generated natural energy can be used as power. More and more companies sell electricity. Since the introduction cost of the power generation system using natural energy is also decreasing year by year, it is easier to introduce the power generation system year by year, and the number of power generation systems using natural energy is increasing year by year.

  Further, as in Patent Document 1 below, a commercial power source such as a gas engine and a commercial power source such as a gas engine can be used to completely cover the load power required by the power supply system even when the commercial power source provided by the power company is in a power failure state. A power generation system that controls switching between systems that generate power from different external energy has been proposed, and studies are underway on the use of energy other than commercial power.

JP 2009-284590 A

About New Energy, Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry (http://www.enecho.meti.go.jp/energy/newenergy/newene01.htm)

  Electronic devices such as servers are also required to reduce the power consumption of commercial power supplied from electric companies for the purpose of reducing electricity bills and CO2. In order to realize the reduction of the power consumption of the commercial power supply in the electronic device, there is mainly an increase in the efficiency of the power supply unit inside the electronic device. In order to increase the efficiency of the power supply unit, a method using a low-loss component or board is generally used. However, many low-loss components and boards are expensive, and the power supply unit becomes expensive, and as a result, there is a case where there is no effect of reducing the electricity bill. Even if low-loss components or boards are used, the efficiency of the power supply section is not always high, and the efficiency may be low when the load is low or near the rated load. Since the loss of the part is large, the power consumption of the commercial power supply increases. In order to reduce the power consumption of the commercial power supply, it is necessary to always use the power supply unit under a load condition with high efficiency.

The subject includes a first power supply circuit having two input terminals connected to the first input terminal, a second power supply circuit connected to the second output terminal, and a detection unit connected to the load. A connection state between the first power supply circuit and the detection unit, a switching unit that changes a connection state between the second power supply circuit and the detection unit, and a connection state of the switching unit based on the detection result of the detection unit. By using an electronic device characterized by having a power supply unit with a control unit to change, by connecting a power supply device converted natural energy to at least one of the first input terminal or the second input terminal, realizable.
Normally, the power supply unit of the prior art used in an electronic device has only a commercial power supply as an input, and all loads of the power supply unit lead to power consumption of the commercial power supply. By connecting the input of the power supply unit to two power sources of the commercial power source and the natural energy converted power source, the load on the power source unit can be divided into two power consumptions of the commercial power source and the natural energy converted power source device. .

  Further, the power supply unit has a load region where efficiency is low, such as a low load. If the efficiency is low, loss in the power supply unit is large, so that power consumption in the commercial power supply increases. This is because the function of detecting the load and the output of the power supply circuit unit fed from the commercial power supply and the output of the power supply circuit unit fed from the power supply device converted from natural energy can be switched or used together. It is possible to switch the power supply circuit used with a specific load or to use two power supply circuits in combination. By switching and using the power supply circuit to match the load of the power supply unit so that the efficiency of the power supply circuit to which power is supplied from the commercial power supply remains high, the power consumption of the commercial power supply can be reduced. it can.

  ADVANTAGE OF THE INVENTION According to this invention, the electric power of the commercial power source electrically fed to an electronic device can be reduced.

The figure which showed the basic form of this invention (Example 1). The control flow of the basic form of this invention. The efficiency characteristic and input power characteristic figure of the power supply circuit which inputs the commercial power supply by the basic form of this invention. The time characteristic figure of the input power of the power supply circuit which inputs the commercial power supply by the basic form of this invention. The figure which showed the form which added the function which outputs the switching or combined use state of a power supply circuit outside to the basic form of this invention (Example 2).

  FIG. 1 is a diagram showing a basic form of the present invention. The basic form of the present invention includes two input terminals, a first power supply circuit 101 connected to the first input terminal 11, a second power supply circuit 201 connected to the second input terminal 21, A detection unit 301 connected to the load 31, a connection state between the first power supply circuit and the detection unit, a switching unit 401 that changes a connection state between the second power supply circuit and the detection unit, and detection by the detection unit A control unit 501 that changes the connection state of the switching unit based on the result is provided, and the control unit 501 controls the switching unit 401 so that the first power supply circuit 101 can be operated in a specific efficiency state. The switching unit 401 includes a switching unit 402 that enables ON / OFF switching of power supply from the first power supply circuit 101 and a switching unit 403 that enables ON / OFF switching of power supply from the second power supply circuit 201. A commercial power supply 601 is connected to the first input terminal, and a power supply device 701 converted from natural energy is connected to the second input terminal.

FIG. 2 is a diagram showing a control flow of the basic form of the present invention. FIG. 3 is a diagram showing efficiency characteristics and input power characteristics of the first power supply circuit 101 according to the basic form of the present invention. The power supply circuit 101 has high efficiency when the load is electric power 1001 to 1002. When the load detection unit 401 detects a load less than the power 1001, the switching unit 402 is turned off and the switching unit 403 is turned on to make the first power supply circuit 101 no load and the load POUT2 of the second power supply circuit 201. Becomes the load POUT of the power supply unit. In this case, the efficiency of the first power supply circuit 101 is 0%, and the power consumption P of the commercial power supply 601 is the no-load loss PLOSS of the power supply circuit 101 as shown in Equation 1. When the detection unit 301 detects a load of electric power 1001 to 1002, the switching unit 402 is turned on and the switching unit 403 is turned off, whereby the load POUT1 of the first power supply circuit 101 becomes the load POUT of the power supply unit. No load. In this case, the first power supply circuit 101 is in a high efficiency state, and the power consumption P of the commercial power supply 601 is the power obtained by dividing the load POUT of the power supply unit by the efficiency ρ of the first power supply circuit 101, that is, the first power supply circuit. The input power P1 is 101. When the detection unit 301 detects a load having a power of 1002 or more in the power supply unit, both the switching unit 402 and the switching unit 403 are turned on, and the total of the load POUT1 of the first power supply circuit 101 and the load POUT2 of the second power supply circuit 201 Becomes the load POUT of the power supply unit. For example, when the load POUT of the power supply unit becomes 1002, the load POUT1 of the first power supply circuit 101 is set to be the power 1003 between the powers 1001 to 1002, so that the load POUT of the power supply unit is 1002 or more. The first power supply circuit 101 can maintain a high efficiency state, and the input power of the commercial power supply 601 is lower than that of the load 1002 of the power supply unit. The power consumption of the commercial power supply 601 when the load of the power supply unit is 1001 or less, 1001 to 1002, or 1002 or more can be expressed as Equation 1, Equation 2, and Equation 3.
(Equation 1)
When load of power supply unit is less than 1001 P = PLOSS
(Equation 2)
When the load of the power supply unit is 1001 to 1002
P = P1 = POUT1 / ρ = POUT / ρ
(Equation 3)
When the load of the power supply is 1002 or more
P = P1 = POUT1 / ρ = (POUT−POUT2) / ρ
FIG. 4 is a diagram showing a change over time of input power of a power supply circuit using a commercial power supply as an input according to the basic form of the present invention. It is assumed that the load of the power supply unit is 1001 or more at time 2001, 1002 or more at time 2002, less than 1002 at elapsed time 2003, and less than 1001 at elapsed time 2004. When the input of the power supply unit of the prior art is only the commercial power supply 601, the power obtained by dividing the load POUT of the power supply unit by the efficiency ρ of the first power supply circuit 101 becomes the power consumption P of the commercial power supply 601. In this case, the power consumption P of the commercial power supply 601 becomes the no-load loss POSS of the first power supply circuit 101 in the period T1 less than the time 2001 or the period T5 from the time 2004 to 2005, and the power of the commercial power supply 601 is higher than that of the conventional technology. Lower. The power difference ΔP1 can be expressed as Equation 4. In the period T2 from time 2001 to 2002 and the period T4 from time 2003 to 2004, the power consumption P of the commercial power supply 601 is the same as the input power P1 of the first power supply circuit 101. During a period T3 from 2002 to 2003, the power consumption P of the commercial power supply 601 becomes the input power P1 of the first power supply circuit 101 having a power of 1002 or less, and the power of the commercial power supply 601 is lower than that of the prior art, and the power difference ΔP2 Can be expressed as in Equation 5 where ρ1 is the efficiency of the power supply circuit 101 with power 1002 or more and ρ2 is the efficiency of the first power supply circuit 101 with power 1001 to 1002. Further, the effect ΔPh of the power amount of the present invention with respect to the prior art can be expressed as in Expression 6.
(Equation 4)
ΔP1 = (POUT / ρ) −PLOSS
(Equation 5)
ΔP2 = (POUT / ρ1) − (POUT1 / ρ2)
= (POUT / ρ1) − ((POUT−POUT2) / ρ2)
(Equation 6)
ΔPh = ΔP1 (T1 + T5) + ΔP2 × T3
FIG. 5 is a diagram showing a form in which the output switching or combined state of the first power supply circuit 101 and the second power supply circuit 201 can be output to the outside of the electronic device with respect to the basic form. A signal line 801 is a signal line for outputting the output switching or combined use state of the first power supply circuit 101 and the second power supply circuit 201 from the control unit 501 to the outside of the electronic device, and the switching unit 3001 is a power supply obtained by converting natural energy. This is a switching unit that switches ON / OFF the output power of the device 701 to the electric company. Since the second power supply circuit 201 is not used when the load of the power supply unit is 1001 to 1002, the control unit 501 outputs a signal for turning on the switching unit 3001 from the signal line 801, turns on the switching unit 3001, and generates natural energy. The output power of the converted power supply device 701 is sold to an electric company. When the load of the power supply unit is less than 1001 or 1002 or more, the second power supply circuit 201 is used, so the switching unit 3002 is turned off to stop selling power to the electric company.

  It goes without saying that the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention. For example, in the basic configuration, one first power supply circuit to which power is supplied from the commercial power supply 601 is mounted. However, a plurality of power supply circuits are mounted so that the power consumption of the commercial power supply 601 is reduced. The power supply circuit may be controlled.

  DESCRIPTION OF SYMBOLS 11 ... 1st input terminal, 21 ... 2nd input terminal, 31 ... Load of power supply part, 101 ... 1st power supply circuit part, 201 ... 2nd power supply circuit part, 301 ... Load detection part of power supply part, 401: an output switching unit configured to be able to switch or use the outputs from the power supply circuit 101 and the power supply circuit 201; 402: a switching unit in the output switching unit 401 that enables ON / OFF switching of power supply to the power supply circuit 101; 403... Switching unit in the output switching unit 401 that enables power supply ON / OFF switching of the power supply circuit 201, 501... Control unit that controls output switching or combined use of the switching unit 401, 601. 801... Signal lines for outputting the output switching or combined use state of the switching unit 401 to the outside of the electronic device, 1001, 1002, 1003, power, 2001, 2002, 2 03,2004,2005 ... time, 3001 ... switching unit for switching the power sale of ON / OFF of the output power of the power supply device 701 converts natural energy into electric company.

Claims (2)

  A first power supply circuit having two input terminals connected to the first input terminal; a second power supply circuit connected to the second input terminal; a detector connected to a load; A switching unit that changes a connection state between the first power supply circuit and the detection unit, a connection state between the second power supply circuit and the detection unit, and a control unit that changes the connection state of the switching unit based on the detection result of the detection unit An electronic device comprising:   2. The electronic device according to claim 1, wherein a power supply device that converts natural energy is connected to at least one of the first input terminal and the second input terminal.

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