Page 142 - Industrial Power Engineering and Applications Handbook
P. 142
6/122 Industrial Power Engineering and Applications Handbook
Rear view Front view
Figure 6.24(b) Thyristor cubicles for high-power static converter units (Courtesy: Siemens)
L
SI and S, are static
unidirectional switches,
which may be an IGBT
or a thyristor.
I/C
AC
Supply
Figure 6.25 A typical bi-phase chopper scheme
control, besides being inexpensive in the presently an inverter. In Figure 6.26(a) we show a basic IGBT or
developed ratings compared to GTOs. A fixed d.c. voltage thyristor (GTO) inverter unit. Single IGBTs developed
is obtained through a power diode converter. The so far can handle machines up to 650 kW. There are
conversion from a fixed a.c. supply to a variable a.c. some deratings of an IGBT on account of a lower r.m.s.
supply is thus cheap and easy to handle. A complete value of the inverted power, compared to the power input
system composed of a converter and an inverter unit, as to the inverter, the configuration of the inverter (which
used to control an a.c. motor, is more commonly called defines the inverted waveform), the ambient temperature,
