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Relative efficiency measurement in a pulse width modulation system

A technology of relative efficiency and efficiency, which is applied in the direction of output power conversion devices, conversion equipment without intermediate conversion to AC, and adjustment of electrical variables, which can solve problems such as changes in SMPS efficiency

Active Publication Date: 2013-10-09
MICROCHIP TECH INC
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  • Application Information

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Problems solved by technology

In addition, the high efficiency of SMPS is only optimized for single load conditions
However, in real world applications, electrical loads vary over a wide range, and the associated SMPS efficiency at those loads also varies

Method used

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  • Relative efficiency measurement in a pulse width modulation system
  • Relative efficiency measurement in a pulse width modulation system
  • Relative efficiency measurement in a pulse width modulation system

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Embodiment Construction

[0024] Pulse width modulated (PWM) power conversion systems have improved efficiency over a wide range of operating input voltages and loads. Being able to measure the relative efficiency of an analog PWM system allows for enhanced control while maintaining the benefits of analog control. An analog low-pass filter produces an average value of the PWM pulse train, which is then converted to a digital value by means of an analog-to-digital converter and stored so that the relative efficiency of the PWM power conversion system can be compared for various combinations of operating parameters.

[0025] In accordance with the teachings of the present invention, a low-pass (eg, resistor-capacitor (RC)) filter can be used to average the PWM control signal used in the SMPS system. An analog-to-digital converter (ADC) converts the analog output of the low-pass filter into a digital value that can be stored in digital format. PWM system parameters may be adjusted (eg, fine-tuned) while ...

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Abstract

A pulse width modulation (PWM) power conversion system has improved efficiency over a wide operating input voltage and load range. Being able to measure relative efficiency of an analog PWM system allows enhanced control while maintaining the benefits of analog control. An analog low pass filter produces an average value of the PWM pulse train, then this analog average value is converted into digital values with an analog-to-digital converter and stored so that relative efficiencies of the PWM power conversion system may be compared for various combinations of operating parameters.

Description

[0001] Related Application Cross Reference [0002] This application asserts the filing on December 29, 2010 of Scott Dearborn, Terry L. Cleveland, and Clifford Ellison III Priority to commonly-owned U.S. Provisional Patent Application No. 61 / 427,856, entitled "Relative Efficiency Measurement in a Pulse Width Modulation System," filed on Purpose is hereby incorporated herein by reference. technical field [0003] The present invention relates to pulse width modulation (PWM) systems, and more particularly, to measuring the relative efficiency of an analog PWM system and using the measured efficiency to determine optimal operating parameters, system health, and likelihood of PWM system failure. Background technique [0004] Ways to improve the efficiency of power / energy conversion systems are constantly being sought. For example, switch mode power supply (SMPS) applications. The SMPS topology is gaining wider acceptance due to its high efficiency, small size and light weig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/157H02M3/158
CPCY02B70/1466H02M2001/0048H02M3/1588H02M3/157Y02B70/1491H02M1/0048Y02B70/10H02M3/10H02M3/155H02M3/158
Inventor 斯考特·迪尔伯恩特丽·L·克利夫兰克利福·N·埃里森三世
Owner MICROCHIP TECH INC
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