Operation Principle - Energic Plus NGTOP Manuel D'installation Et D'utilisation

Battery charger NGTOP

Operation 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
i
v
Batteria
i
DC
In modern battery chargers these disadvantages are solved with an indirect AC/DC conversion, by
passing through an intermediate DC/DC conversion.
i
i AC
DC
v
i
DC 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 Scheme
D01090-02
Disadvantages of this solution are:
•
Low efficiency
•
Large physical size
•
Long charge times
•
Charge depends on changes in the mains supply (with
overcharge danger in the final charge phase)
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
Batteria
costs and physical dimensions using
switches more faster and powerful
(modern technology).
English
F0
R
F1 EMI
S
FILTER
F2
T
E
15 D01090-02
Battery charger NGTOP
RECTIFIER POWER RECTIFIER
AND AND
FILTER STAGE FILTER
RECTIFIER CONTROL
AND
FILTER LOGIC
English
F4
EMI
FILTER
16