Patent ID: 9628013
Date: 2017-04-18
CPC Classifications: B23Q,H02K,H02P

Claim:
1. A control method for a primary part of a linear drive, wherein the primary part includes a plurality of sequentially consecutive segments which are each connected to a supply voltage via a respective converter, such that each of plurality of sequentially consecutive the segments receive respective currents of a three-phase system, the method comprising: specifying a respective desired speed value to a respective control device which controls the respective converter; updating, by the respective control device, a respective basic commutation angle based on the respective desired speed value; capturing and supplying the respective currents to the respective control device; determining, by the respective control device, a respective direct-axis component of current and a respective quadrature-axis component of current based on the respective currents and a respective commutation angle, the respective direct-axis component of current and the respective quadrature-axis component of current relating to a secondary part of the linear drive; supplying, by the respective control device, a respective desired value for the quadrature-axis component of current and the respective quadrature-axis component of current to a respective regulator for the quadrature-axis component of current, said respective regulator for the quadrature-axis component of current determining a respective desired value for the quadrature-axis component of voltage from the respective desired value for the quadrature-axis component of current and the respective quadrature-axis component of current; supplying, by the respective control device, a respective desired value for the direct-axis component of current and the respective direct-axis component of current to a respective regulator for the direct-axis component of current, said a respective regulator for the direct-axis component of current determining a respective desired value for the direct-axis component of voltage from the respective desired value for the direct-axis component of current and the respective direct-axis component of current; determining, by the respective control device, based on the respective desired value for the direct-axis component of voltage, the respective desired value for the quadrature-axis component of voltage and the respective commutation angle, characteristic data with respect to voltages of a three-phase voltage system which are to be output by the respective converter to the respective segment, and specifying said determined characteristic data to the respective converter; determining, by the respective control device, the respective commutation angle as a sum of the respective basic commutation angle and a respective damping commutation angle plus at least one of (i) a respective first correction value and (ii) a respective second correction value; determining, by the respective control device, the respective damping commutation angle via a respective vibration damping block to which at least one of (i) at least the respective desired value for the direct-axis component of voltage and (ii) the respective desired value for the quadrature-axis component of voltage are supplied; receiving, by the respective control device, the respective first correction value from the control device which controls at least one of (i) the currently preceding segment and (ii) the respective second correction value from the control device which controls the currently succeeding segment; determining, by the respective control device, at least one of (i) a first correction variable and (ii) a second correction variable via the respective vibration damping block; and transmitting, by the respective control device, at least one of (i) the respective first correction variable to the control device which controls the currently preceding segment and (ii) the respective second correction variable to the control device which controls the currently succeeding segment.