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Speed Regulation

IP.com Disclosure Number: IPCOM000096555D
Original Publication Date: 1963-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Caburet, A: AUTHOR

Abstract

This device regulates the speed of a rotating member. The latter is subject to jerks. It is driven by an electric motor through a belt. The jerks do not modify the motor speed because of the great inertia of the motor. They modify the belt tension and consequently the instantaneous speed of the rotating member.

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Speed Regulation

This device regulates the speed of a rotating member. The latter is subject to jerks. It is driven by an electric motor through a belt. The jerks do not modify the motor speed because of the great inertia of the motor. They modify the belt tension and consequently the instantaneous speed of the rotating member.

Such variations are avoided by using, as a tension regulator, the torque applied to the stator of the motor. Stator 1 is unlocked from frame 2 and can turn around rotor 3 which rotates around bearings 4. Conductors 5 feeding stator coils 6 are slightly slack, thus allowing an angular displacement of stator 1. This bears arm 7 terminated by roller 8 which leans against belt 9 transmitting motion from driving pulley 11 to a driven pulley, not shown. Abutment 13 limits the course of stator 1 in case of escapement of the belt.

When the motor rotates in the direction of the arrow, the stator is subjected to a torque which presses roller 8 against belt 9 and so maintains the belt tension. If the load of the driven pulley suddenly increases, the length of leading strand 9a tends to decrease. The length of led strand 9b tends to increase. The decreasing of strand 9a temporarily reduces the speed of driven pulley. It should also diminish the relative speed between stator and rotor. Lenz's law opposes such a diminution. Consequently, the current increases and a stronger torque is applied to the stator. This increases the press of roller 8 against be...