发明公开
EP0911956A2 Staggered pulse width modulation apparatus and method for EMI minimization in motor 审中-公开
设备具有交错脉冲宽度调制,和方法,用于最小化在电动机的电磁干扰

  • 专利标题: Staggered pulse width modulation apparatus and method for EMI minimization in motor
  • 专利标题(中): 设备具有交错脉冲宽度调制,和方法,用于最小化在电动机的电磁干扰
  • 申请号: EP98119805.4
    申请日: 1998-10-15
  • 公开(公告)号: EP0911956A2
    公开(公告)日: 1999-04-28
  • 发明人: Makaran, John Edward
  • 申请人: SIEMENS CANADA LIMITED
  • 申请人地址: 2185 Derry Road West Missisauga, Ontario L5N 7A6 CA
  • 专利权人: SIEMENS CANADA LIMITED
  • 当前专利权人: SIEMENS CANADA LIMITED
  • 当前专利权人地址: 2185 Derry Road West Missisauga, Ontario L5N 7A6 CA
  • 代理机构: Allen, Derek
  • 优先权: US63032P 19971023; US100000 19980619
  • 主分类号: H02P7/29
  • IPC分类号: H02P7/29 H02P8/18
Staggered pulse width modulation apparatus and method for EMI minimization in motor
摘要:
An apparatus and method for minimizing electromagnetic interference in a unipolar phase motor having a supply current is provided. The motor further has a plurality of motor phases energizable with pulse width modulation (PWM). The method comprises calculating the current harmonics on a right edge aligned PWM, calculating the current harmonics on a left edge aligned PWM pulse, determining the supply current by summing the current harmonics for the right edge aligned PWM pulse and the current harmonics for the left edge aligned PWM pulse, energizing a first motor phase with PWM, and staggering the PWM pulses for each successive motor phase by varying the energizing of any two adjacent energized phases based on the amount of supply current in the motor, the staggering of the PWM pulses minimizing electromagnetic interference and current harmonic generation due to an increase in the supply current.
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