Control Techniques, Drives and Controls Handbook (Power and by W. Drury

By W. Drury

This publication incorporates a good deal of useful info for drives and business engineers who use vehicles and drives. it's a entire advisor to the expertise underlying drives and cars. It comprises adequate idea to offer either person and scholar an perception into the layout of those parts and thereby the limitations and possibilities that exist. it's been considerably revised and improved from the former version to comprise a lot new info.

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Extra resources for Control Techniques, Drives and Controls Handbook (Power and Energy)

Example text

The torque decreases linearly as the speed increases. The slope of this function is a constant KtKe/Ra and is independent of the BRUSHLESSSERVOMOTORS:Principles of Operation of Brushless Servomotors 20 terminal voltage and the speed. C. motor relatively easy. 30 shows the structure of a typical brushless servomotor. The windings are in the static armature, which is part of the stator, and therefore the rotor of a brushless servomotor can be considered to be the equivalent of R~ 0 |i [ Servomotors require rapid acceleration and deceleration, and the maximum torque therefore has to be several times larger than the rated torque.

C. motor comprise the rotating shaft-mounted wound armature and connected commutator, the field system surrounding the armature across the motor air gap, the supporting and enclosing end frames with shaft bearings and brush gear to connect the commutator to external terminals. 11. C. C. C. motor is a square, laminated iron flame with a curved inner face. Main pole lamination and coil shunt field assembly are mounted on the inside face at 90 ° to each other, with interpole assemblies interposed at 45 ° between.

Synchronous motor application engineering needs particular care to ensure that the machine will accelerate its load to synchronous speed and be capable of holding synchronous speed under transient load conditions. Such a motor can prove commercially attractive, particularly where precise speed holding or speed matching between drives is essential and where, by borrowing alternator technology, advantage can be taken of volume manufacture and the availability of an IP23 protection enclosure, which allows improved cooling.

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