e.
9. Other Information
9.2 General measures when using electronic control systems4
Semiconductor switches such as thyristors or triacs also produce interference
voltages. They occur as a result of non-linear characteristics and finite ignition
voltages. These components must be protected against excessive voltages, for
which mainly varistors, RC combinations or choke coils are used. The use of zero-
voltage switches is also recommended.
The suggestions made represent only a few of the possible ways of protecting a
microprocessor-controlled regulator system from interference. The suggested
measures have the advantage that they will increase the lifetime of the devices as
lower induction voltages (reduced spark formation) will also reduce contact burn.
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