SYSTEM AND METHOD FOR CONTROLLING DC - DC CONVERTER

• US 20140369075A1
• Filed: 09/10/2013
• Published: 12/18/2014
• Est. Priority Date: 06/13/2013
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: SEONG, Hyun Wook, CHOI, Won Kyoung, JANG, Hui Sung, KIM, Sung Kyu, KWAK, Mu Shin, BAE, Su Hyun
• Granted Patent: US 9,236,805 B2
• Time in Patent Office: Days
• US Class Current: 363/17
• CPC Class Codes: H02M 1/32 Means for protecting converters other than automatic disconnection
• CPC Class Codes: H02M 3/33515 with digital control
• CPC Class Codes: H02M 3/3376 with automatic control of output voltage or current

Abstract

A system and a method for controlling a DC-DC converter include a microcomputer for deriving an input limiting current value by dividing an input limiting power value by an input voltage value. A conversion circuit scales the input limiting current value to a limiting voltage value. A voltage control circuit derives a control voltage value based on an output voltage value and a reference voltage value and defines the limiting voltage value as a control voltage limiting value. A current control circuit generates a pulse width modulation (PWM) control signal based on the control voltage value.

Claims

1. A system for controlling a direct current, DC-DC converter, comprising:

a microcomputer for deriving an input limiting current value by dividing an input limiting power value by an input voltage value;

a conversion circuit for scaling the input limiting current value to a limiting voltage value;

a voltage control circuit for deriving a control voltage value based on an output voltage value and a reference voltage value and defining the limiting voltage value as a control voltage limiting value; and

a current control circuit for generating a pulse width modulation (PWM) control signal based on the control voltage value.

2. The system of claim 1, wherein the conversion circuit has a predetermined voltage range and derives the limiting voltage value by scaling the input limiting current value within the voltage range.

3. The system of claim 1, wherein the current control circuit controls a bridge converter by generating the PWM control signal, thus controlling an input current.

4. A system for controlling a DC-DC converter, comprising:

a microcomputer for deriving an output limiting current value by dividing an output limiting power value by an output voltage value;

a conversion circuit for scaling the output limiting current value to a limiting voltage value;

a voltage control circuit for deriving a control voltage value based on an output voltage value and a reference voltage value and defining the limiting voltage value as a control voltage limiting value; and

a current control circuit for generating a pulse width modulation (PWM) control signal based on the control voltage value.

5. A method of controlling a DC-DC converter, comprising:

deriving an input limiting current value by dividing an input limiting power value by an input voltage value;

scaling the input limiting current value to a limiting voltage value;

deriving a control voltage value based on a reference voltage value and a feedback output voltage value, and defining the limiting voltage value as a control voltage limiting value; and

generating a Pulse Width Modulation (PWM) control signal for a bridge converter based on the control voltage value.

6. A method of controlling a DC-DC converter, comprising:

deriving an output limiting current value by dividing an output limiting power value by an output voltage value;

scaling the output limiting current value to a limiting voltage value;

deriving a control voltage value based on a reference voltage value and a feedback output voltage value, and setting the limiting voltage value as a control voltage limiting value; and

generating a pulse width modulation (PWM) control signal for a bridge converter based on the control voltage value.