API tracker used to reverse engineer electric motor components

Laser Tracker Calibration process by APIPartzsch Elektromotoren uses an API tracker at customer sites to measure massive electric and railway machines. The tracker enables Partzch to measure coaxiality and axial run-out from the outside of the machine – two components that could not easily be measured using traditional optics and other tools.

API’s portable measuring systems can be used in a wide range of applications and are ideal for deployment to customer sites thanks to their compact dimensions and low weight. This defines the measuring task on the respective motor according to the drawing – although a drawing is not always available, as electric motors in particular have extremely long service lives, and could have already been in use for 30 years or more. In the construction of electric machines, the rotor and the stator are the main parts, to which laminations, form coils and Roebel bars are added, and can reach considerable proportions depending on the size of the electrical machine.

But the system is not only used during service work at the customer’s premises. A completely different task is the measurement of an auxiliary exciter. Partzsch Elektromotoren manufactures these components for d.c. machines and railway machines. Without a laser tracker, we previously had to carry out the measurement with an outside micrometer – which meant that coaxiality and axial run-out could not be measured.

Checking stators

We are referring here to stators from electric motors which could be up to 3 meters long. All the stators were measured in the initial samples; this involved the measurements of the outer diameter within the context of the mechanical processing, the coaxiality, inner diameter, cylindricity and axial run-out.

Wind energy

In the field of wind generators, Partzsch Elektromotoren offers electrical and mechanical diagnosis and repair of all electrical equipment for wind turbines. Here, the laser tracer supports the installation of generators and the laser-optical alignment of generators, gearboxes, and equipment from the in-house tool manufacture.

Roebel bars

In the Roebel bar manufacturing part of the Production area the laser tracker proves its worth in the dimension control of the bars on the devices, as well as the setting of the devices themselves. The Roebel bars themselves are manufactured by hand in two (mirror-image) versions and are then placed into one of the groove copies of the generator in electric motors from Partzsch Elektromotoren.