ARLA/CLUSTER: As potenciais interferências nas bandas de HF geradas pelos novos sistemas Wireless Power Transfer não são negligenciáveis

[João Costa > CT1FBF]

Potential interference from Wireless Power Transfer systems

The SARL made a presentation to members of the SABS Technical Committee,
TC-73, on the potential interference that Wireless Power Transfer systems
for the charging of electric vehicles may cause on the HF bands.

The committee discussed the possible implications and supported the SARL
call to place the matter formally on the agenda of Work Group 1 which will
further review the potential of interference and report back at the next
meeting of TC-73 which will be held at the end of May.
The May TC-73 meeting will formulate South Africa's official position when
the matter is discussed at the CISPR meeting in China in mid-October this
year.

*Hans van de Groenendaal* who made the presentation said that he was
encouraged by the positive support during the discussion.

While the number of electric vehicles in South Africa is currently low, the
potential of a rapid increase is great. Shell recently announced that it
will be installing charging facilities on a large number of their
forecourts and two major motor vehicle manufactures have already installed
charging system in their showrooms.

Some discussions in CEPT suggest that the existing spurious emission limits
for inductive SRDs are appropriate but these were developed on a wholly
different set of assumptions about duty cycle, location and whether victim
and emitter share the same frequency.
These standards are not appropriate for WPT which has a high duty cycle
with power up to 22 kilowatt, located in residential areas and its
harmonics are likely to be spread across a band of frequencies.

The South African Radio League <http://www.sarl.org.za/Default.asp>
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