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CN1075282C 用于五相无刷直流电机的控制电路 失效 - 权利终止

用于五相无刷直流电机的控制电路
摘要：
一种用于五相无刷直流电机(102)的控制系统(100)，所述电机包括具有5个绕组的定子和被安装用于相对于所述绕组(114)旋转的转子(116)。绕组(114)适用于响应转子(116)的旋转位置而被电子换向。控制系统(100)包括检测电路(106)，用于使用光检测器或磁检测器或者检测绕组(114)中的反电动势电压来检测转子(116)的旋转位置。电子开关(112)响应由控制电路响应转子(116)的旋转位置而产生的控制信号控制流经绕组的电流流动。控制电路(110)包括用于启动电机(102)的启动逻辑。如果转子(106)在启动时按错误方向转动，控制电路(110)则激励预先选定的绕组(114)，并等待转子(116)的运动基本上停止，然后按照启动程序激励绕组(114)，从而使转子(116)沿正确方向旋转。一旦转子(116)沿正确方向旋转，控制电路(110)则响应转子(116)的旋转位置对绕组(114)进行电子换向。
摘要（英）：

A control system (100) for a five-phase brushless DC motor (102) including a stator having five windings and a rotor (116) mounted for rotation relative to the windings (114). The windings (114) are adapted to be electronically commutated in response to the rotary position of the rotor (116). The control system (100) includes a sensing circuit (106) to sense the rotary position of the rotor (116) using an optical or magnetic sensor or the back electromotive force voltages in the windings (114). Electronic switches (112) control the flow of current through the windings (114) in response to control signals generated by a control circuit (110) in response to the rotary position of the rotor (116). The control circuit (110) includes start-up logic to start the motor (102). If the rotor (116) is rotating in a wrong direction upon start-up, the control circuit (110) energizes preselected windings (114) and waits for the movement of the rotor (116) to come substantially to a stop and then energizes the windings (114) in a start-up sequence to cause the rotor (116) to rotate in a correct direction. Once the rotor (116) is rotating in the correct direction, the control circuit (110) electronically commutates the windings (114) in response to the rotary position of the rotor (116).

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