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MICROPROCESSOR-CONTROLLED SYNCHRONOUS SERVO DRIVE
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| Author(s) |
H.-H. Letas |
| Abstract |
At present electrical servo-drives are mostly realised by using DC servo-motors with permanent excitation or separate field windings. In order to eliminate the commutator and to achieve a compact design, a permanent magnet sychronous motor with rare earth magnet excitation has been developed. The 1.2 kW synchronous servo drive described performs a speed step of 2000 rpm in 7 milliseconds at 6 times rated current. In the field weakening range the speed can be raised up to 8000 rpm. The power supply consists of a high frequency transistor inverter. The speed and position control of the drive is performed by a double-microprocessor system based on the INTEL 8086 employing rotor coordinates. The sampling rate of 3.2 kHz requires a high resolution speed and position sensing. The resolution of an incremental optical sensor with 1024 cycles per rev. was greatly improved up to 260 000 / rev. by evaluating the waveform of the nearly sinusoidal sensor outputs. |
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| Filename: | Unnamed file |
| Filesize: | 2.872 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-03-11 by System |
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