发明名称 |
Frequency converter, motor, motor drive system and maintenance method for motor drive system |
摘要 |
A frequency converter for outputting a power to drive a motor, having: an inverter unit for inverting a d.c. power to an a.c. power; a control unit for controlling the inverter unit; and a housing for supporting at least the inverter unit and control unit, wherein a rise time change unit is provided in the housing, the rise time change unit changes a rise time of a waveform of a voltage output from the inverter unit.
|
申请公布号 |
US7663337(B2) |
申请公布日期 |
2010.02.16 |
申请号 |
US20090354427 |
申请日期 |
2009.01.15 |
申请人 |
HITACHI INDUSTRIAL EQUIPMENT SYSTEM CO. |
发明人 |
SHIMOZONO TADAHIRO;OBATA TAKESHI;SAITO KOICHIRO;MATSUMOTO OSAMU;OBATA KOUJI |
分类号 |
H02P23/00;H02M7/48;H02P29/02 |
主分类号 |
H02P23/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|