Cantec Systems CHFC-1 Installations- und Benutzerhandbuch - Seite 4
Blättern Sie online oder laden Sie pdf Installations- und Benutzerhandbuch für Batterieladegerät Cantec Systems CHFC-1 herunter. Cantec Systems CHFC-1 10 Seiten. High frequency battery charger
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Operating principle
The battery charger considerably affects battery life and performances, which is the main part of every
electric vehicle.
A non controlled traditional battery charger (rectifier) provides a simple direct AC/DC conversion.
i
AC
v
DC
In modern battery chargers these disadvantages are solved with an indirect AC/DC conversion, by
passing through an intermediate DC/DC conversion.
i
AC
v
DC
•
The main advantages of this solution are:
•
High efficiency
•
Reduced dimensions
•
Short charge times
•
Charge independent from the changes of the mains supply
Electronic control that provides the desired charge curve
The advent of electrical problems (due to commutation) has imposed the introduction of adequate filtering
to satisfy requirements of EMC 89/336/EEC directive for electromagnetic compatibility.
Block Diagram
F1
L
EMI
E
FILTER
N
Battery charger CHFC-1
•
Disadvantages of this solution are:
•
Low efficiency
•
Large physical size
Battery
•
Long charge times
Charge depends on changes in the mains supply (with
overcharge danger in the final charge phase)
DC
Battery
DC
RECTIFIER
AND
FILTER
RECTIFIER
AND
FILTER
This is the usual method of operation for the
SMPS (Switching Mode Power Supply) at
high power. This solution gives a good
performance for minimum costs and physical
dimensions using switches more faster and
powerful (modern technology).
POWER
RECTIFIER
STAGE
FILTER
CONTROL
LOGIC
EMI
AND
FILTER
F2
4