Week 4 Session 5
Explain the various applications of Power converters in an Electric vehicle.
1.DC-DC converter
2.DC-AC converter
3.AC-DC converter
1.DC-DC converter:
DC-DC converter is a device which is used to convert the one DC voltage to another Dc voltage.It is also called as a chopper.
Application EV:
1.USB charging Circuit ( 12v to 5v).
2.PCB board control supply (12v to 5v).
3.PCB board control supply (12v to 12v).
4.High voltege DC motor( 48v to 180v).
5.Horn circuit.
Types:
Non isolated converter
1.Buck converter
Convert high volateg to low voltage
2.Boost converter
Convert low voltage to low voltage
3.Buck boost converter
Convert either high or low voltage
4.Cuk converter
It is also convert either high or low voltage but is continous current application
Isolated converter
In this type, the input and output stages are separated and there is a presence
of a transformer which can further reduce or increase the output voltage apart from being
done by the duty cycle
1.Flyback Converter
The Flyback converter is a DC/DC converter that uses a Flyback transformer (Like coupled inductor)is used to isolate the in DC voltage to Output DC voltage
2.Forward Converter
The forward converter is a DC/DC converter that uses a transformer to increase or decrease the output voltage
depending on the transformer ratio and provide galvanic isolation for the load.
3.Half bridge
A half-bridge converter is a type of DC-DC converter that, like flyback and forward converters,
can supply an output voltage either higher or lower than the input voltage and provide electrical
isolation via a transformer
4.Full bridge
A Full-bridge converter is a type of DC-DC converter that, like flyback and forward converters,
can supply an output voltage either higher or lower than the input voltage and provide electrical
isolation via a transformer.
Resonant converter
It is used for high power application
2.DC to AC converter:
It is a converter which is used to convert the DC voltage to AC voltage it is called inverter.
It is used for AC motor application EV architecture.The inverter can change the speed at which the motor rotates by adjusting the frequency of the alternating current.
3.AC to DC converter:
AC/DC converters are electrical circuits that transform alternating current (AC) input into direct current (DC) output. AC/DC Converters are also called rectifiers they convert the input AC voltage to variable DC voltage, then optimize it through a filter to obtain an unregulated DC voltage.
In EV side it is used for charging the battery
For Example what type of converter will you use for Horn which requires DC and less than 10V
1.Buck converter is used to convert the High voltege to low voltage for horn application
