利索-全球专利检索

  1. 登录
  2. 注册
实用新型
CN204231259U 电机运行中三相交交变频器容错运行装置 失效 - 权利终止

电机运行中三相交交变频器容错运行装置
摘要：
一种电机运行中三相交交变频器容错运行装置，它包括用三个单相交交变频电路构成的三相交交变频电路，容错部分包括三个开关，每个开关连接三相交流电机出线端口和三相交交变频星形联结电路中点；在一组单相交交变频器故障切除后，用非故障的两组单相交交变频器保证电机正常运行；当某一组单相交交变频器发生故障时，闭合相应开关切除这组交交变频器，将该相电机绕组直接连接到变频器中点；使用非故障的两组单相交交变频器代替三相交交变频器，使电机三相绕组上保持三相对称正弦波。通过调整非故障的两组单相交交变频器的触发延迟角，使电机三相绕组上保持三相对称正弦波，保证电机在变频器故障下的正常运行。
摘要（英）：

A three-phase AC-AC frequency converter fault-tolerant operation device in motor operation includes a three-phase AC-AC frequency conversion circuit formed by three single-phase AC-AC frequency conversion circuits, a fault-tolerant portion includes three switches, each switch is connected with a wire outlet port of a three-phase AC motor and a midpoint of a three-phase AC-AC frequency conversion star-shaped connection circuit; after a fault of a set of single-phase AC-AC frequency converters is removed, two sets of non-fault single-phase AC-AC frequency converters are used to ensure normal operation of the motor; when a fault occurs in some set of single-phase AC-AC frequency converters, the corresponding switch is turned off to remove the AC-AC frequency converter, and a motor winding of the phase is directly connected to a midpoint of the frequency converter; and the two sets of non-fault single-phase AC-AC frequency converters are used to replace the three-phase AC-AC frequency converter, so that three-phase symmetrical sine waves are maintained on a three-phase winding of the motor. By adjustment of trigger delay angles of the two non-fault sets of single-phase AC-AC frequency converters, three-phase symmetrical sine waves are maintained on the three-phase winding of the motor, thereby ensuring normal operation of the motor under a circumstance of a fault of the frequency converter.

0/0