US 2013/0076330 A1 · POWER CONVERTER

Abstract

A power converter includes a control circuit provided with a set signal generator, a current command generator, a reset signal generator, a drive signal generator, and a pulse-width limiter. The set signal generator generates a set signal at every predetermined cycle. The current command generator generates a current command based on an output voltage command and an output voltage. The reset signal generator generates a reset signal based on an input current and the generated current command. The drive signal generator generates a drive signal which turns on in synchronisation with the generated set signal to turn on a switching element and which turns off in synchronization with the subsequently generated reset signal to turn off the switching element. The pulse-width limiter limits a pulse-width of the drive signal according to an input voltage and the output voltage, or according to the input voltage and the output voltage command.

Claims19

Dependent claims

A power converter, comprising:

a switching element that is driven to be turned on/off for converting one voltage to another;
and
a control circuit that controls driving of the switching element,
wherein the control circuit includes:
a set signal generator that generates a set signal at every predetermined cycle;
a current command generator that generates a current command based on an output voltage command and an output voltage outputted from the power converter;
a reset signal generator that generates a reset signal based on an input current inputted to the power converter and the generated current command;
a drive signal generator that generates a drive signal which turns on in synchronization with the generated set signal to thereby turn on the switching element, and which turns off in synchronization with the subsequently generated reset signal to thereby turn off the switching element;
and
a pulse-width limiter that limits a pulse-width of the drive signal according to an input voltage inputted to the power converter and the output voltage, or according to the input voltage and the output voltage command.

7 more elements

A control circuit for a power converter including a switching element that is driven to be turned on/off for converting one voltage to another, the control circuit comprising:

a set signal generator that generates a set signal at every predetermined cycle;
a current command generator that generates a current command based on an output voltage command and an output voltage outputted from the power converter;
a reset signal generator that generates a reset signal based on an input current inputted to the power converter and the generated current command;
a drive signal generator that generates a drive signal which turns on in synchronization with the generated set signal to thereby turn on the switching element, and which turns off in synchronization with the subsequently generated reset signal to thereby turn off the switching element;
and
a pulse-width limiter that limits a pulse-width of the drive signal according to an input voltage inputted to the power converter and the output voltage, or according to the input voltage and the output voltage command.

3 more elements

A control method for a power converter including a switching element that is driven to be turned on/off for converting one voltage to another, the control method comprising the steps of:

generating a set signal at every predetermined cycle;
generating a current command based on an output voltage command and an output voltage outputted from the power converter;
generating a reset signal based on an input current inputted to the power converter and the generated current command;
generating a drive signal which turns on in synchronization with the generated set signal to thereby tuna on the switching element, and which turns off in synchronization with the subsequently generated reset signal to thereby turn off the switching element;
and
limiting a pulse-width of the drive signal according to an input voltage inputted to the power converter and the output voltage, or according to the input voltage and the output voltage command.

3 more elements

Dependencies are inferred from the claim text.

Power converter

Life of this patent

Power converter

Life of this patent

Abstract

Claims19