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Electric power supply control device which can lower power consumption

A power supply control device and electric power technology, applied in the direction of high-efficiency power electronic conversion, output power conversion device, electrical recording technology using charge graph, etc., can solve the problems of increased switching loss and increased power consumption

Inactive Publication Date: 2015-09-16
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, switching loss per unit time increases and power consumption increases

Method used

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  • Electric power supply control device which can lower power consumption
  • Electric power supply control device which can lower power consumption
  • Electric power supply control device which can lower power consumption

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0034] figure 1 It is a block diagram schematically showing the configuration of the image forming apparatus in the first embodiment of the present invention.

[0035] refer to figure 1 , the image forming apparatus mainly includes a power supply control device 1000 , loads LD1 and LD2 . Loads LD1 and LD2 are respectively connected to the output side of the power supply control device 1000 . The power supply control device 1000 converts an AC current (an example of an input current) output from an AC power supply PW of a commercial power supply into a DC current, and outputs the converted DC current to loads LD1 and LD2 .

[0036] The power control device 1000 includes an AC / DC (alternating current / direct current) converter 1 (an example of a first converter) and a control board 2 . The AC / DC converter 1 performs an operation of converting an AC current output from the AC power supply PW to output a DC current having a constant voltage value (constant voltage) to the output...

no. 2 Embodiment approach

[0057] image 3 It is a time chart showing transition of the output voltage of the AC / DC converter 1 in the second embodiment of the present invention. Figure 4 yes image 3 Enlarged view of part R.

[0058] refer to image 3 as well as Figure 4 , in this embodiment, the output voltage of the AC / DC converter 1 is controlled to be not higher than the third predetermined value P3 and not lower than the fourth predetermined value P4.

[0059] Specifically, at time TM11 when the conversion operation of the power supply control unit 113 is stopped, if the output voltage of the AC / DC converter 1 indicated by the feedback signal SN1 reaches the second predetermined value P2, and the off-mode control signal SN2 is turned off, then At time TM12, the power control unit 113 starts the switching operation, and the output of the power control signal SN3 is turned on. Time TM12 is a time after a predetermined time elapses from time TM11. During the period from time TM11 to time TM12...

no. 3 Embodiment approach

[0066] Figure 5 It is a block diagram schematically showing the configuration of the image forming apparatus in the third embodiment of the present invention.

[0067] refer to Figure 5 , in the present embodiment, power control device 1000 changes the supply state of power supplied to loads LD1 and LD2 (operation mode of the image forming apparatus) among power saving mode, printing mode, standby mode, and the like. The power saving mode is an operation mode that consumes less power than the print mode and standby mode. Print mode and standby mode are examples of constant voltage modes. The control board 2 is connected to the off-mode control unit 112 , and an operation mode signal SN4 is input to the off-mode control unit 112 . The operation mode signal SN4 is information related to the operation modes of the image forming apparatus such as print mode, standby mode, and power saving mode.

[0068] When the input operation mode signal SN4 is information indicating the p...

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PUM

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Abstract

An electric power supply control device comprises AC / DC converter, DC / DC converters, and an output electrical voltage monitor unit of the AC / DC converter. When output electrical voltage of the AC / DC converter increases to the first preset value P1, the AC / DC converter stops the convert. When the output electrical voltage decreases to the second preset value P2, the AC / DC converter restarts the convert. The first preset value P1 is equal to or less than the lowest value, out of the upper limit values in electrical voltage ranges in which the DC / DC converters CV1 and CV2 can work. The second preset value P2 is more than or equal to the highest value, out of the lower limit values in electrical voltage ranges in which the DC / DC converters CV1 and CV2 can work.

Description

[0001] This application claims priority from Japanese Patent Application No. 2014-46503 filed on March 10, 2014, which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a power control device, and particularly relates to a power control device capable of reducing power consumption. Background technique [0003] Among image forming devices using electrophotography, there are MFP (Multi-Function Peripheral: Multi-Function Digital All-in-One), fax devices, copiers, printers, etc. [0004] In electronic equipment represented by an image forming apparatus, after converting an alternating current into a direct current, a DC / DC (direct current / direct current) converter is used to convert the input direct current into a direct current with a different voltage value and output it to equipment for each load. Furthermore, in an electronic device, it is possible to shift from a normal mode in which normal operations are perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/12H02M3/28
CPCG03G15/80H02M3/24H02M3/33507H02M7/217H02M1/0035H02M1/007H02M1/008Y02B70/10
Inventor 木村拓青木干之中村英树野野山昌宏舛田纯一山田洋平
Owner KONICA MINOLTA INC