YSG-series VVVF adjustable speed three-phase induction motors for roller tables are newly developed products for meeting the needs of technology innovation and equipment renewal as well as applications of AC speed regulation in metallurgical industry. Combined with our several decades rich experience in manufacturing mill, hoisting and elevator motors and research achievements in AC VVVF speed regulation, they possess the advantages of small volume, wide speed range, reliable operation, easy maintenance, etc. The motors are provided with heat-resistant lubricating grease and re-feeding device and their mechanical construction is also strengthened. With high overload capacity, they are able to operate continuously or intermittently under the serve conditions of high temperature and dusty environment, and undergo impact load, such as frequent starting and braking, repeated change of direction rotation, plug braking, etc. The technical requirements of the motors comply with the stipulations of the international IEC60034-1 standard and the state GB755 standard, and the overall technical index has taken the lead in our country. They can be matched with the abroad various frequency converters and conducive to energy saving and automatic control.
YSG-series motors for roller tables can be classified as Type YSGa and Type YSGb according to their mechanical characteristics. With a relatively soft mechanical characteristic, Type YSGa motors feature high locked torque, low locked current and high dynamic constant, capable of direct starting at full voltage and achieving frequent starting, braking and reversing operation. Controlled by frequent converter, they can operate for speed regulation ranging from 30 to 80 Hz. The motors are mainly used to drive rollers of working tables running on S5 duty. With a relatively hard mechanical characteristic, Type YSGb motors make a feature of good performance for VVVF speed regulation, and can realize such a wide speed range for constant torque from 5 to 50 Hz and constant power from 50 to 80 Hz. They are mainly used to drive rollers of conveying tables running on S1 duty. Controlled by frequent converter, the motors can make use of its low frequency starting and braking functions and also achieve frequent starting, braking and reversing operation, for driving rollers of working tables running on S5 duty.