发明申请
US20090256508A1 ELECTRONICALLY COMMUTATED MOTOR 有权
电子通用电机

  • 专利标题: ELECTRONICALLY COMMUTATED MOTOR
  • 专利标题(中): 电子通用电机
  • 申请号: US12361551
    申请日: 2009-01-29
  • 公开(公告)号: US20090256508A1
    公开(公告)日: 2009-10-15
  • 发明人: Benjamin HAASFrank Heller
  • 申请人: Benjamin HAASFrank Heller
  • 优先权: DE102008008080.2 20080129
  • 主分类号: H02P6/14
  • IPC分类号: H02P6/14
ELECTRONICALLY COMMUTATED MOTOR
摘要:
An electronically commutated motor (20) has a rotor (28) and a rotor position sensor (30), which sensor, during operation, furnishes a rotational position signal (34). A stator interacts with the rotor (28). The stator has a stator winding strand (26) in an H bridge (22), and a control apparatus (36) which, during operation, performs the steps of: (A) controlling the H bridge (22) so that current pulses (+i1, −i1) flow through the stator winding strand (26), in alternate directions, each pulse starting at a first point in time (t1); (B) at the beginning of each commutation, starting from a second point in time (t2), operating in short circuit the winding strand (26), in order to cause a decreasing loop current (I*) through the stator winding strand (26), which loop current (I*) reaches zero at a third point in time (t3); and (C) stepwise modifying, toward a minimum, the time interval (TCC) between the first and third points in time (t1, t3).
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