公开(公告)号：US20140334192A1

公开(公告)日：2014-11-13

申请号：US14361037

申请日：2012-12-06

Applicant: Noliac A/S

Inventor： Kaspar Sinding Meyer ,  Martin Schøler Rødgaard ,  Michael Andreas Esbern Andersen ,  Thomas Andersen

IPC: H02M3/335

CPC classification number: H02M3/33584 ,  H01L41/044 ,  H02M3/33592 ,  H02M3/3385 ,  H02M7/537 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: The present invention relates to a bi-directional piezoelectric power converter comprising a piezoelectric transformer. The piezoelectric transformer comprises an input electrode electrically coupled to a primary section of the piezoelectric transformer and an output electrode electrically coupled to an output section of the piezoelectric transformer to provide a transformer output signal. A bi-directional switching circuit is coupled between the output electrode and a DC or AC output voltage of the power converter. Forward and reverse current conducting periods of the bi-directional switching circuit is based on the input drive signal or the transformer output signal such that a forward current is conducted from the output electrode through the bi-directional switching circuit to the DC or AC output voltage in a first state to charge the DC or AC output voltage. In a second state, a reverse current is conducted through the bi-directional switching circuit from the DC or AC output voltage to the output electrode to discharge the DC or AC output voltage and return power to the primary section of the piezoelectric transformer.

Abstract translation: 本发明涉及一种包括压电变压器的双向压电功率转换器。 压电变压器包括电耦合到压电变压器的初级部分的输入电极和电耦合到压电变压器的输出部分以提供变压器输出信号的输出电极。 双向开关电路耦合在输出电极和功率转换器的DC或AC输出电压之间。 双向开关电路的正向和反向电流传导周期基于输入驱动信号或变压器输出信号，使得正向电流从输出电极通过双向开关电路传导到DC或AC输出电压 处于对DC或AC输出电压充电的第一状态。 在第二状态下，通过双向开关电路将反向电流从DC或AC输出电压传导到输出电极，以对DC或AC输出电压进行放电并将功率返回到压电变压器的初级部分。

公开(公告)号：US20140334193A1

公开(公告)日：2014-11-13

申请号：US14361050

申请日：2012-12-06

Applicant: NOLIAC A/S

Inventor： Kaspar Sinding Meyer ,  Michael Andreas Esbern Andersen ,  Martin Schøler Rødgaard ,  Thomas Andersen

IPC: H02M3/335 ,  H02M3/338

CPC classification number: H02M3/33584 ,  H01L41/044 ,  H02M3/33592 ,  H02M3/3385 ,  H02M7/537 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: The present invention relates to a piezoelectric power converter comprising an input driver electrically coupled directly to an input or primary electrode of the piezoelectric transformer without any intervening series or parallel inductor. A feedback loop is operatively coupled between an output voltage of the piezoelectric transformer and the input driver to provide a self-oscillation loop around a primary section of the piezoelectric transformer oscillating at an excitation frequency. Electrical characteristics of the feedback loop are configured to set the excitation frequency of the self-oscillation loop within a zero-voltage-switching (ZVS) operation range of the piezoelectric transformer.

Abstract translation: 本发明涉及一种压电功率转换器，其包括直接与压电变压器的输入或主电极电耦合的输入驱动器，而没有任何中间串联或并联电感器。 反馈回路可操作地耦合在压电变压器的输出电压和输入驱动器之间，以在激励频率下振荡的压电变压器的初级部分周围提供自振荡回路。 反馈回路的电气特性被配置为将压电变压器的零电压切换（ZVS）操作范围内的自振荡回路的激励频率设定为。