Loom operating apparatus and method
Patent 5162717 Issued on November 10, 1992. Estimated Expiration Date: 
February 1, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 1, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInverter-motor system with different control characteristics for inverter voltage and frequency Inverter circuit for operating a speed-controllable asynchronous motor Coasting AC motor restart system and method Inverter Patent #: 4859924 InventorAssigneeApplicationNo. 649064 filed on 02/01/1991US Classes:318/778, Starting control139/1E, Loom driving, reversing and disconnecting mechanism318/431, Initial, "cracking" or "starting from rest" torque control318/807, Frequency control318/812Voltage controlExaminersPrimary: Ro, BentsuAttorney, Agent or FirmForeign Patent References
International ClassH02P 001/26Foreign Application Priority Data1990-02-09 JPAbstractA loom operating apparatus and method involving the use of an inverter device interposed between loom motor and power supply. The inverter device is controlled so as to make the motor torque greater than a rated value from immediately after start-up up to the completion thereof, and equal to the rated value thereafter. This eliminates contact wear and other disadvantages associated with the use of contact circuits, and allows the loom to be started up free of staggered weaves.Field of SearchMOTOR LOAD, ARMATURE CURRENT OR FORCE CONTROL DURING STARTING AND/OR STOPPINGInitial, "cracking" or "starting from rest" torque control Having electronic power conversion circuit Having variable frequency supply Electronic device controls current in secondary circuit Starting control With speed control Three phase motor with variable transformer to initially adjust voltage to motor windings Frequency control Voltage control Loom driving, reversing and disconnecting mechanism Speed regulation Increase compensated Tension Loom-part control | |
