Motor for high speed winding of synthetic threads from spinneret - has starting moment four times the synchronous moment

摘要

Electric motor is arranged so that its outer mantle rotates and acts as a friction roller for the goods being wound. The external rotor is a tubular hysteresis rotor of steel with a high degree of electrical conductivity. The steel has a specific resistance of ca. 0.1 OMEGA mm2/8 and is hardened to the extent that there is a remanence field strength of 9 to 10 KG. The motor, unlike cage wound motors requires only a small starting current for a high degree of starting toque, and it adjusts itself to a consistent turning moment under heavy acceleration loading at the synchronous speed.