Power Management Method and Power Management System

• US 20140062193A1
• Filed: 09/03/2013
• Published: 03/06/2014
• Est. Priority Date: 09/04/2012
• Status: Active Grant

• Current Assignee: Pegatron Corporation
• Original Assignee: Pegatron Corporation
• Inventors: Chen, Ying-Ying
• Granted Patent: US 9,515,490 B2
• Time in Patent Office: Days
• US Class Current: 307/31
• CPC Class Codes: G01R 19/16528 using digital techniques or performing arithmetic operations using digital techniques to measure a voltage or a current, see G01R19/25
• CPC Class Codes: G05F 1/10 Regulating voltage or current G05F1/02 takes precedence; for electric railways B60M3/02
• CPC Class Codes: H02J 4/00 Circuit arrangements for mains or distribution networks not specified as ac or dc
• CPC Class Codes: H02J 9/005 using a power saving mode for copiers G03G15/5004
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/20 End-user application control systems
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

A power management method includes: reading the driving current; determining if a driving current of an electronic device is less than or equal to a first steady current value for a first period of time; turning off a first electronic module to decrease the driving current when the driving current is less than or equal to the first steady current value for the first period of time; determining if the driving current is within a first judging range for a second period of time; updating the first steady current value with a second steady current value when the driving current is within the first judging range for the second period of time; determining if the second steady current value is less than or equal to an energy saving set value.

Claims

1. A power management method for an electronic device operated with a driving current, the power management method comprising:

(a) reading the driving current;

(b) determining if the driving current is less than or equal to a first steady current value for a first period of time, wherein the first steady current value is an initial current set value;

(c) turning off a first electronic module of the electronic device to decrease the driving current when the driving current is less than or equal to the first steady current value for the first period of time, wherein the first electronic module corresponds to a first current variation parameter;

(d) determining if the driving current is within a first judging range for a second period of time, wherein a maximum value of the first judging range is a sum of the first steady current value and the first current variation parameter, and a minimum value of the first judging range is a difference between the first steady current value and the first current variation parameter;

(e) updating the first steady current value with a second steady current value when the driving current is within the first judging range for the second period of time, wherein the second steady current value is a difference between the first steady current value and the first current variation parameter;

(f) determining if the second steady current value is less than or equal to an energy saving set value; and

(g) activating an energy saving mode when the second steady current value is less than or equal to the energy saving set value.

2. The power management method of claim 1, further comprising:

turning off a second electronic module of the electronic device to decrease the driving current when the second steady current is larger than the energy saving set value, wherein the second electronic module corresponds to a second current variation parameter.

3. The power management method of claim 2, further comprising:

determining if the driving current is within a second judging range for the second period of time, wherein a maximum value of the second judging range is a sum of the second steady current value and the second current variation parameter, and a minimum value of the second judging range is a difference between the second steady current value and the second current variation parameter.

4. The power management method of claim 1, after the step (d) further comprising:

(d1) determining if the driving current is larger than or equal to a sum of the initial current set value and the first current variation parameter when the driving current is out of the first judging range for the second period of time.

5. The power management method of claim 4, further comprising:

resetting the first steady current value by the initial current set value and executing the step (a) when the driving current is larger than or equal to the sum of the initial current set value and the first current variation parameter; and

executing the step (b) when the driving current is less than the sum of the initial current set value and the first current variation parameter.

6. The power management method of claim 1, further comprising:

defining a prior-assembling operation current value, a post-assembling operation current value, a sleeping operation current value, the initial current set value, and a current variation parameter corresponding to each electronic module;

determining if the prior-assembling operation current value is larger than or equal to the post-assembling operation current value; and

setting the sleeping operation current as the energy saving set value.

7. The power management method of claim 6, further comprising:

setting the prior-assembling operation current value as the first steady current value when the prior-assembling operation current value is larger than or equal to the post-assembling operation current value; and

setting the post-assembling operation current value as the first steady current value when the prior-assembling operation current value is less than the post-assembling operation current value.

8. A power management system for managing a power of an electronic device having at least one electronic module and operated with a driving current, the power management system comprising:

a detecting module connected with the electronic device and reading the driving current;

a comparison module connected with the detecting module and storing a first steady current value and a first current variation parameter, wherein the detecting module transmits the driving current to the comparison module, and the comparison module compares the driving current with the first steady current value and determines if the driving current is within a first judging range, and a maximum value of the first judging range is a sum of the first steady current value and the first current variation parameter, and a minimum value of the first judging range is a difference between the first steady current value and the first current variation parameter; and

a control module connected with the detecting module and the comparison module, wherein the comparison module transmits an activation signal to the control module;

the control module, according to the activation signal, drives the electronic device to turn off a first electronic module to decrease the driving current when the driving current is less than or equal to the first steady current value for a first period of time, wherein the first electronic module corresponds to the first current variation parameter.

9. The power management system of claim 8, wherein the comparison module updates the first steady current value with a second steady current value when the comparison module determines that the driving current is within the first judging range for a second period of time, wherein the second steady current value is a difference between the first steady current value and the first current variation parameter.

10. The power management system of claim 9, wherein the comparison module further has an energy saving set value and compares the second steady current value with the energy saving set value;

the comparison module transmits an energy saving signal to the control module to activate an energy saving mode of the electronic device when the comparison module determines the second steady current value is less than or equal to the energy saving set value.