公开(公告)号：US06316896B1

公开(公告)日：2001-11-13

申请号：US09619287

申请日：2000-07-19

申请人： Kari A. Tikkanen ,  Donald J. Truettner ,  Charles J. Dubats

发明人： Kari A. Tikkanen ,  Donald J. Truettner ,  Charles J. Dubats

IPC分类号： H02H708

CPC分类号： H02H3/06 ,  H02P29/02 ,  Y10T307/469 ,  Y10T307/477

摘要： A man machine interface for an A-C motor bypass has a membrane keypad with a multiplicity of pushbuttons connected to a micro-controller. The micro-controller controls the flow of current to the coil of each of the drive and bypass contactors to thereby open or close those contactors depending on if the motor is to be driven and how it is to be driven. The micro-controller includes code that simulates a first state machine that determines the operating condition of the drive and bypass contactors and if it is desired to open that one of the two contactors which is presently open and close that one of the two contactors when is presently open. The micro-controller includes code which simulates a second state machine which is active only when the inverter contactor is open. This state machine determines if the motor is to run or stop and closes or opens the bypass contactor accordingly. The micro-controller includes a non-volatile memory that is used to store the last operating mode of the bypass operating condition if that mode was either automatic operation of the motor, that is, the motor is connected to an A-C source through the inverter in the bypass, or off.

摘要翻译： 用于A-C电机旁路的人机界面具有薄膜键盘，多个按钮连接到微控制器。 微控制器控制每个驱动和旁路接触器的线圈的电流流动，从而根据电动机是否被驱动以及如何被驱动来打开或关闭这些接触器。 微控制器包括模拟第一状态机的代码，其确定驱动器和旁路接触器的操作状态，并且如果希望打开当前打开和关闭两个接触器中的一个的两个接触器中的一个接触器 目前开放 微控制器包括模拟仅当变频器接触器打开时才有效的第二状态机的代码。 该状态机确定电机是否运行或相应地停止和关闭或打开旁路接触器。 微控制器包括非易失性存储器，用于存储旁路工作条件的最后操作模式，如果该模式是电动机的自动操作，即电动机通过逆变器连接到AC电源 旁路或关闭。