Method for force calibration, force computation and force limitation in iron core linear motors

摘要

A method for force calibration, force computation and force limitation of iron core linear motors by detecting interfering influences during the operating of the sled, wherein a winding current measured in the linear motor is used as value for these interfering forces, and the sled of the linear motor with all add-ons but without application forces over a desired travel area with a one-time calibration and, in the process, at least one interfering current value and at least one position value are recorded and stored by at least one current and position sensor per travel interval, wherein the interfering current value represents the sum of the interfering forces and, in the later application operation, the saved data record of interfering current and position values is interpolated and used as compensation value for computing the force-proportional application current of the linear motor.

主权项

1. A method for force calibration, force computation and force limitation of iron core linear motors by detecting interfering influences during the driving of the sled, wherein a winding current measured in the linear motor is used as a value for said interfering forces, the method comprising
performing a one-time calibration by driving the sled of the linear motor with all add-ons but without application forces to move over a desired travel area and, during the movement of the sled recording at least one interfering current value and at least one position value by at least one current and position sensor per travel interval, storing said recorded at least one interfering current value and said at least one position value in a saved data record, wherein the at least one interfering current value represents a sum of the interfering forces and, in a later application operation, interpolating the saved data record of the at least one interfering current value and the at least one position value to obtain an interpolated value; and computing, using the interpolated value as a compensation value, a force-proportional application current of the linear motor.