公开(公告)号：US20140307480A1

公开(公告)日：2014-10-16

申请号：US14245379

申请日：2014-04-04

Applicant: DENSO CORPORATION

Inventor： Masashi HAMAMOTO ,  Kimikazu NAKAMURA ,  Kenta HATAKENAKA

IPC: H02M3/335

CPC classification number: H02M3/3376

Abstract: An electric power conversion device has a transformer, a DC-AC conversion circuit, an AC-DC conversion circuit and a control circuit. The control circuit calculates an input current instruction value Iref based on a difference value ΔV between an output voltage Vout of the AC-DC conversion circuit and an output voltage instruction value Vref. A comparator compares an input current Iin of the DC-AC conversion circuit with the value Iref. The DC-AC conversion circuit is controlled by the comparison result of the comparator. The control circuit correctly determines an occurrence of an abnormality state of the electric power conversion device based on the operation state of the comparator, the difference value ΔV between the output voltage Vout of the AC-DC conversion circuit and the output voltage instruction value Vref, and the input voltage Vin of the DC-AC conversion circuit without using any output current of the AC-DC conversion circuit.

Abstract translation: 电力转换装置具有变压器，DC-AC转换电路，AC-DC转换电路和控制电路。 控制电路基于AC-DC转换电路的输出电压Vout与输出电压指令值Vref之间的差值Dgr; V来计算输入电流指令值Iref。 比较器将DC-AC转换电路的输入电流Iin与值Iref进行比较。 DC-AC转换电路由比较器的比较结果控制。 控制电路基于比较器的运行状态，AC-DC转换电路的输出电压Vout与输出电压指令值之间的差值＆Dgr; V，正确地确定电力转换装置的异常状态的发生 Vref和DC-AC转换电路的输入电压Vin，而不使用AC-DC转换电路的任何输出电流。