Pwm apparatus and method for controlling pulse width modulation switching frequency

A technology of width modulation and control pulse, which is applied in the field of devices that control the PWM switching frequency by inverting the PWM scheme. Effect

Active Publication Date: 2018-06-29
HYUNDAI AUTOEVER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to adjust the timing of ADC sensing

Method used

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  • Pwm apparatus and method for controlling pulse width modulation switching frequency
  • Pwm apparatus and method for controlling pulse width modulation switching frequency
  • Pwm apparatus and method for controlling pulse width modulation switching frequency

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Embodiment Construction

[0033] The above objects, features and advantages will become apparent from the detailed description with reference to the accompanying drawings. Embodiments described in sufficient detail enable those skilled in the art to easily practice the technical idea of ​​the present invention. Detailed descriptions of well-known functions and configurations may be omitted so as not to unnecessarily obscure the gist of the present invention. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like numbers refer to like elements throughout the drawings.

[0034] Hereinafter, an apparatus and method for controlling a PWM switching frequency according to exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0035] figure 1 is a block diagram showing an apparatus for controlling a PWM switching frequency according to an exemplary embodiment of the pr...

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Abstract

Disclosed herein are an apparatus and a method for controlling PWM switching frequency that employ a negate PWM scheme to thereby increase PWM switching frequency, improve control responsiveness, andreduce the size of the circuit. The apparatus includes: a power factor correction (PFC) converter configured to convert an AC voltage into a DC voltage, the converter comprising a transistor controlling an operation of the PFC converter and a current sensor for measuring an electric current flowing through the transistor; and a controller configured to receive an output from the current sensor andcalculate a duty ratio of a switching signal applied to a gate terminal of the transistor. The controller applies the calculated duty ratio to the switching signal in an on-duty period of the switching signal.

Description

technical field [0001] The present invention relates to a device and method for controlling PWM switching frequency. More particularly, the present invention relates to an apparatus and method for controlling a PWM switching frequency using a negate PWM scheme, thereby increasing the PWM switching frequency, improving control responsiveness, and reducing circuit size. Background technique [0002] Recently, in order to expand the range of green vehicles, the capacity of batteries has been increasing. The capacity of the on-board charger (OBC) for charging the battery is also increasing. Consequently, OBC controllers are also growing in size and price. [0003] There are several ways to reduce the size and price of an OBC controller. Among them, there is a method of developing a current transformer sensor capable of replacing a Hall sensor employed in an OBC controller as a current sensor in order to reduce costs. [0004] Typically, in order to reduce the size of a power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M7/06H02M3/335
CPCH02M1/4208H02M7/066H02M3/33573H02M1/4225H02M3/33538H02M3/3376Y02B70/10H02M1/0025H02M1/0012H02M1/0009H02M1/0058H02M1/007H02M1/08H02M7/06H03K7/08
Inventor 林洞辉沈祐锡黄炫斗
Owner HYUNDAI AUTOEVER
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