
394 Power semiconductor circuit applications
Operating the induction heater from a d.c. link inverter requires that the
a.c. input supply is first rectified and smoothed, to give the d.c. link
voltage. Alternatively, cycloinverter arrangements can be used to provide
the high-frequency output without the need for a d.c. link, as described in
section 10.6 and shown in Figure 10.20, a centre-tapped heating coil being
used. Generally, d.c. link inverters provide a more efficient and cheaper
drive system and are more frequently used than cycloinverters.
14.5 Electrochemical
There are many electrochemical applications for power semiconductors
althoug ...