发明名称 |
AC-DC CONVERTER WITH OUTPUT POWER SUPPRESSION |
摘要 |
A power conversion apparatus for converting AC power supplied from an AC power source to DC power includes an AC-DC conversion circuit connected with the AC power source at an input end thereof for converting the AC power to DC power, a DC-DC conversion circuit connected with an output end of the AC-DC conversion circuit at an input end thereof for converting DC voltage level of the DC power generated by the AC-DC conversion circuit, a smoothing capacitor parallel connected to the output end of the AC-DC conversion circuit and the input end of the DC-DC conversion circuit, a DC link voltage detector for detecting a voltage of the smoothing capacitor as a DC link voltage, and a control unit for controlling operation of the DC-DC conversion circuit. The control unit suppresses an output power of the DC-DC conversion circuit, if the DC link voltage is smaller than a predetermined value. |
申请公布号 |
US2017110972(A1) |
申请公布日期 |
2017.04.20 |
申请号 |
US201615390763 |
申请日期 |
2016.12.27 |
申请人 |
DENSO CORPORATION |
发明人 |
HANDA Yuuichi;IYASU Seiji;NAKAMURA Kimikazu |
分类号 |
H02M3/335;H02M1/32 |
主分类号 |
H02M3/335 |
代理机构 |
|
代理人 |
|
主权项 |
1. A power conversion apparatus comprising:
an AC-DC conversion circuit connected with an AC power source at an input end thereof for converting an AC power supplied from the AC power source to DC power; a DC-DC conversion circuit connected with an output end of the AC-DC conversion circuit at an input end thereof for converting DC voltage level of the DC power generated by the AC-DC conversion circuit; a smoothing capacitor parallel connected to the output end of the AC-DC conversion circuit and the input end of the DC-DC conversion circuit; a DC link voltage detector for detecting a voltage of the smoothing capacitor as a DC link voltage; and a control unit for controlling operation of the DC-DC conversion circuit, wherein the control unit is configured to suppress output power of the DC-DC conversion circuit if the DC link voltage is smaller than a first predetermined value, and the control unit suppress the output power of the DC-DC conversion circuit by multiplying a voltage command value as a value to command an output voltage of the DC-DC conversion circuit by a coefficient set in a range between 0 and 1 in accordance with the DC link voltage. |
地址 |
Kariya-city JP |