The aim of my diploma thesis, based on ''Dynamic Spinn testing of Commutators'', was to present the need, beginning and development of measuring and testing methods in the field of assuring quality semimanufacture as is collector.
The word »kolektor« originates from English word collector, which in Slovene language means »zbiralec« – somebody or something that collects. Alternative word is a »komutator« . Its origin is also English from commutator and it means a way switch.
Both words quite clearly represent function of collector in the complex of electromotor, collecting electric energy from carbon brushes for need of induction separate spools on rotor of electromotor and also commutator, because each spool has got its own pair of lamella on collector.
When electromagnetic field is established, rotor starts to spin because of resistance in a phase shift among the stator and rotor field.
Diploma is portioned in more volumes. They leads us from beginning of dynamic collector testing when certain needs appeared.
That were needs of :
• establishing possibility to prolong life span of products
• larger transferable power on motor
• better end cheaper construction at assured quality of product
Follows the chapter based on, parameters which shows us measuring errors and sensors.
As for pretentiousness of measure is necessity to decide which sensor we will choose for measure. Testing is performed at increased temperature, large centrifugal forces, which may cause demolition. That is why sensor must be simply installable, reliable, with wide bandwidth and fast response time. At possible damage it can be easily repaired and recalibrated. Because of nature of measurement a sensor must be contactless, which leads us to the choice between capacity sensor, Eddy Current sensor and laser optical sensor. I presented the theory of operation, differences among them and difficulties on which we have to recon in their use for the purpose of testing. The emphasize is on a capacitive sensor.
Fifth chapter contains description of apparatus for dynamical testing of commutators manufactured from Coragliotto, company from Torino in Italy, calibration course of testing and analysis of captured data.
Then follows weak points of apparatus and possibility for upgrading and removal of errors.