My thesis’ main topic is the designing of four different split-phase induction machine, which
are used in the Grundfos TP pumps at Grundfos Manufacturing Ltd. In the introduction
Grundfos is introduced as one of the biggest pump manufacturing companies. After that
a brief summary of pumps considering the requirements of the driving electrical machines
After detailing the designing task and summarizing what kind of requirements have to be
fulfilled by these machines I collect the knowledge according to the design of a splitphase
induction machine. After these I summarize what considerations have to be taken into
account at Grundfos during designing to achieve a costruction that is easily manufactured,
and is economically beneficial.
Before the designing steps are discussed, I introduce Speed as one of the most important
tools that is used in the design practice at Grundfos. I collect the induction machine
equations used by this software.
The designing process is discussed in two main steps. First, sizing and calculating of the
machine based on analytical formulas that found in literature is shown. The second main
part is showing the steps that are done at the company based on existing machines. After
that calculation of one of the given machines based on the known formulas is done.
After that calculations based on the literature and with Speed are compared.
Finally measurements of the manufactured prototypes are compared to the calculations.