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POSITIONING ACCURACY OF A SENSORLESS CONTROLLED SERVO DRIVE SYSTEM
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| Author(s) |
A. Broesse; G. Henneberger; Th. Klepsch |
| Abstract |
An indirect position controlled drive system without mechanical position sensor can be realized using a sensorless operating permanent excited synchronous machine. The
pole-position and the rotor speed of the machine are estimated by an extended Kalman filter using only the line voltages and currents. The actual position of the load is indirectly determined form the estimated pole-position. At standstill a small sinusoïdal current, impressed into the d-axis of the motor, enables the Kalman filter to determine the pole-position independent of the load of the drive. The practical results show, that especially at standstill the operating range of such a drive is not limited by the replacement of the mechanical sensors. The achievable position accuracy of the sensorless drive system is measured arid evaluated. |
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| Filename: | Unnamed file |
| Filesize: | 540.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-10 by System |
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