US 2017/0317576 A1 · HYBRID TOPOLOGY POWER CONVERTER AND CONTROL METHOD THEREOF

Abstract

A hybrid topology power converter includes a three-level circuit module and a cascaded H-bridge circuit module. A control method includes the following steps. Firstly, a zero sequence component is injected into a total modulation wave, thereby generating a compensated total modulation wave. Then, a first voltage signal is generated according to the compensated total modulation wave. An H-bridge modulation wave is generated according to the compensated total modulation wave and the first voltage signal. A three-level driving signal is generated according to the first voltage signal, and an H-bridge driving signal is generated according to the H-bridge modulation wave. A duty cycle of at least one switch element of the three-level circuit module is adjusted according to the three-level driving signal. A duty cycle of at least one switch elements of the cascaded H-bridge circuit module is adjusted according to the H-bridge driving signal.

Claims20

Dependent claims

A control method of a hybrid topology power converter, the hybrid topology power converter comprising a three-level circuit module and a cascaded H-bridge circuit module, an output side of the three-level circuit module being connected with an input side of the cascaded H-bridge circuit module, the control method comprising steps of:

injecting a zero sequence component into a total modulation wave, thereby generating a compensated total modulation wave;
generating a first voltage signal according to the compensated total modulation wave;
generating an H-bridge modulation wave according to the compensated total modulation wave and the first voltage signal;
and
generating a three-level driving signal according to the first voltage signal, and generating an H-bridge driving signal according to the H-bridge modulation wave,
wherein a duty cycle of at least one switch element of the three-level circuit module is adjusted according to the three-level driving signal, and a duty cycle of at least one switch elements of the cascaded H-bridge circuit module is adjusted according to the H-bridge driving signal.

3 more elements

A hybrid topology power converter, comprising:

a three-level circuit module;
a cascaded H-bridge circuit module, wherein an output side of the three-level circuit module is coupled with an input side of the cascaded H-bridge circuit module;
and
a control device comprising:
a compensated modulation wave generator receiving a total modulation wave and a zero sequence component and injecting the zero sequence component into the total modulation wave, thereby generating a compensated total modulation wave;
a voltage generator receiving the compensated total modulation wave, and generating a first voltage signal;
a modulation wave generator receiving the first voltage signal and the compensated total modulation wave, thereby generating an H-bridge modulation wave;
and
a pulse generation unit receiving the first voltage signal and the H-bridge modulation wave, and generating a three-level driving signal corresponding to the first voltage signal and an H-bridge driving signal corresponding to the H-bridge modulation wave,
wherein the pulse generation unit adjusts a duty cycle of at least one switch element of the three-level circuit module according to the three-level driving signal, and adjusts a duty cycle of at least one switch elements of the cascaded H-bridge circuit module according to the H-bridge driving signal.

7 more elements

Dependencies are inferred from the claim text.

Hybrid topology power converter and control method thereof

Life of this patent

Hybrid topology power converter and control method thereof

Life of this patent

Abstract

Claims20