US 2026/0291369 A1 · CONVERTER CIRCUIT WITH POSITIVE AND NEGATIVE OUTPUT VOLTAGES

Abstract

An example converter circuit, an electrical system comprising a converter circuit, and a method for generating a positive output voltage and a negative output voltage at a converter circuit are provided. The example converter circuit including a first terminal and a second terminal configured to receive a DC voltage, buck switching circuitry, and freewheeling circuitry. The buck switching circuitry including a buck switching device, an energy storage device, and a positive output capacitor. The freewheeling circuitry including a negative output capacitor, and a freewheeling device. The buck switching device, the energy storage device, the positive output capacitor, the negative output capacitor, and the freewheeling device electrically connected in series. A positive output voltage relative to a common ground terminal is generated across the positive output capacitor, and a negative output voltage relative to the common ground terminal is generated across the negative output capacitor.

Claims20

Dependent claims

A converter circuit comprising:

a first terminal and a second terminal configured to receive a DC voltage;
buck switching circuitry comprising:
a buck switching device;
an energy storage device;
and
a positive output capacitor;
and
freewheeling circuitry comprising:
a negative output capacitor;
and
a freewheeling device;
wherein the buck switching device, the energy storage device, the positive output capacitor, the negative output capacitor, and the freewheeling device are electrically connected in series;
wherein a positive output voltage relative to a common ground terminal is generated across the positive output capacitor, and wherein a negative output voltage relative to the common ground terminal is generated across the negative output capacitor, and
wherein the common ground terminal is the second terminal.

11 more elements

An electrical system comprising:

a converter circuit comprising:
a first terminal and a second terminal configured to receive a DC voltage;
buck switching circuitry comprising:
a buck switching device;
an energy storage device;
and
a positive output capacitor;
and
freewheeling circuitry comprising:
a negative output capacitor;
and
a freewheeling device;
wherein the buck switching device, the energy storage device, the positive output capacitor, the negative output capacitor, and the freewheeling device are electrically connected in series;
wherein a positive output voltage relative to a common ground terminal is generated across the positive output capacitor, and wherein a negative output voltage relative to the common ground terminal is generated across the negative output capacitor, and
wherein the common ground terminal is the second terminal;
and
a positive circuit portion supplied with positive voltage configured to receive the positive output voltage from the converter circuit;
and
a negative circuit portion supplied with negative voltage configured to receive the negative output voltage from the converter circuit.

16 more elements

A method for generating a positive output voltage relative to a common ground terminal and a negative output voltage relative to the common ground terminal based on a high voltage signal at a converter circuit, the method comprising:

providing the converter circuit comprising:
a first terminal and a second terminal configured to receive a DC voltage, wherein the common ground terminal is the second terminal;
buck switching circuitry comprising:
a buck switching device;
an energy storage device;
and
a positive output capacitor;
and
freewheeling circuitry comprising:
a negative output capacitor;
and
a freewheeling device;
wherein the buck switching device, the energy storage device, the positive output capacitor, the negative output capacitor, and the freewheeling device are electrically connected in series;
receiving at the buck switching device of the converter circuit, the high voltage signal comprising a high voltage amplitude;
periodically closing the buck switching device, based on the positive output voltage;
generating the positive output voltage across the positive output capacitor;
and
generating the negative output voltage across the negative output capacitor.

15 more elements

Dependencies are inferred from the claim text.

Converter circuit with positive and negative output voltages

Life of this patent

Converter circuit with positive and negative output voltages

Life of this patent

Abstract

Claims20