Controlling long-stator linear motor coils of a long-stator linear motor stator

    公开(公告)号:US10594245B2

    公开(公告)日:2020-03-17

    申请号:US16105366

    申请日:2018-08-20

    摘要: Method and device for controlling the electrical variables and/or LLM currents of LLM coils of an LLM stator, the movement of a first transport unit is controlled by an associated first transport controller, the movement of a second transport unit is controlled by an associated second transport controller, and a control unit checks whether the first transport controller intends to specify a first controlled variable for an LLM coil and whether the second transport controller simultaneously intends to specify a second controlled variable to the same LLM coil. In this case, either an additional controlled variable, which is derived from the first controlled variable and/or the second controlled variable using a predetermined function f (Ux=f(Ux′, Ux″), or Ux=f(Ux′) or Ux=f(Ux″)), is specified for the LLM coil, or the coil terminals of the LLM coil (Lx) are short-circuited.

    Method for determining the absolute position of a rotor of a linear motor

    公开(公告)号:US10476413B2

    公开(公告)日:2019-11-12

    申请号:US15918391

    申请日:2018-03-12

    摘要: Linear motor and method to determine absolute position of a rotor movable with respect to a stationary part in a direction of movement, without movement of rotor, without additional permanent magnets, without a close arrangement of position sensors, and also during large movements of rotor, at least one edge area of an arrangement of drive magnets is determined, and rough position of rotor is derived, and using known geometry of rotor, specific drive magnet of the arrangement of drive magnets is determined whose magnetic field is detected by at least one of the position sensors in the area of the arrangement of drive magnets. At least one position sensor determines a relative position of measured drive magnet with respect to the at least one position sensor, and absolute position of rotor is determined from known mounting position of this at least one position sensor and from determined relative position.

    Long stator linear motor and method for moving a transport unit of a long stator linear motor

    公开(公告)号:US10454355B2

    公开(公告)日:2019-10-22

    申请号:US16022072

    申请日:2018-06-28

    摘要: In a transition of a transport unit of a long stator linear motor from a first control zone to a following second control zone in a movement direction, a first segment control unit is responsible for controlling the movement of the transport unit and the first control zone is extended, in the movement direction, by a number of virtual drive coils. The first segment control unit, which is assigned to the first control zone, calculates manipulated variables for the virtual drive coils, and transmits the manipulated variables for the virtual drive coils to the second segment control unit, which is assigned to the second control zone. The second segment control unit uses the transmitted manipulated variables for the virtual drive coils in order to energize the drive coils of the second control zone for moving the transport unit.