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2. 发明授权

US4692674A Brushless DC motor control system responsive to control signals generated by a computer or the like 失效
标题翻译：无刷直流电机控制系统响应于由计算机等产生的控制信号
公开(公告)号：US4692674A
公开(公告)日：1987-09-08
申请号：US727838
申请日：1985-04-26
申请人： Douglas T. Packard , Donald E. Schmitt
发明人： Douglas T. Packard , Donald E. Schmitt
IPC分类号： H02P6/08 , H02P8/14 , H02P8/20 , H02P8/40 , H02P6/02
CPC分类号： H02P8/42 , H02P6/08 , H02P8/14 , H02P8/20 , H02P8/40
摘要： A control system for a brushless DC motor responsive to digital control signals is disclosed. The motor includes a multiphase wound stator and a permanent magnet rotor. The rotor is arranged so that each phase winding, when energized from a DC source, will drive the rotor through a predetermined angular position or step. A commutation signal generator responsive to the shaft position provides a commutation signal for each winding. A programmable control signal generator such as a computer or microprocessor produces individual digital control signals for each phase winding. The control signals and commutation signals associated with each winding are applied to an AND gate for that phase winding. Each gate controls a switch connected in series with the associated phase winding and the DC source so that each phase winding is energized only when the commutation signal and the control signal associated with that phase winding are present. The motor shaft may be advanced one step at a time to a desired position by applying a predetermined number of control signals in the proper sequence to the AND gates and the torque generated by the motor may be regulated by applying a separate control signal to each AND gate which is pulse width modulated to control the total time that each switch connects its associated winding to the DC source during each commutation period.
摘要翻译：公开了一种响应数字控制信号的无刷直流电动机的控制系统。电动机包括多相缠绕定子和永磁转子。转子被布置成使得每个相绕组在从直流源通电时将驱动转子通过预定的角位置或台阶。响应于轴位置的换向信号发生器为每个绕组提供换向信号。诸如计算机或微处理器的可编程控制信号发生器为每个相绕组产生单独的数字控制信号。与每个绕组相关联的控制信号和换向信号被施加到用于该相绕组的与门。每个门控制与相关联的相绕组和DC源串联连接的开关，使得仅当存在与该相绕组相关联的换向信号和控制信号时，每个相绕组才被通电。电机轴可以通过以适当的顺序向AND门施加预定数量的控制信号，一次一个步进到所需位置，并且可以通过向每个AND施加单独的控制信号来调节由电动机产生的扭矩门，其被调制以控制每个开关在每个换向周期期间将其相关绕组连接到DC源的总时间。

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