Environmental Engineering Reference
In-Depth Information
20.0 mm
16.0 mm
60.0 mm
j
295.0 mm
R
= 87.5 mm
+
Figure 5.54 VRM machine used as hybrid vehicle starter-alternator
A VRM hybrid vehicle starter-alternator was designed and fabricated to assess
its merits as a viable hybrid propulsion system component [35]. This section will
close with a description of the VRM constructed for a hybrid electric vehicle
starter-alternator rated 8 kW and 300 Nm of torque. Figure 5.54 is an illustration of
the VRM lamination design and stack. Because of the very large diameters
involved, it was necessary to develop a 5-phase machine in which the 10/6 geo-
metry was used as a repeating pattern that was then replicated three times about the
circumference of the machine.
The 5-phase converter for this machine is illustrated in schematic form in
Figure 5.55. Each phase was constructed with pairs of individual phase leg power
modules as shown.
Phase configuration repeated 5 times
Phase : 1-5
SR power converter topology
Figure 5.55 VRM power electronics
