Week 4 Session 5
The power converters used in an electric vehicle are AC-DC converter, DC-DC converter, and DC-AC converter.
Applications of AC-DC converter:
- Used for powering DC appliances that require a DC supply.
- Used to provide polarised voltage in DC electric welding as DC welding helps to produce stable arcs as the current flows in one direction.
- Mosquito repellers since half-wave rectifiers are used in them to drive the lead for the fumes.
- In AM radio, half-wave rectifiers are used as signal peak detectors.
Applications of DC-DC converter:
- In the case of EVs, the main DC/DC converter changes power from the onboard high-voltage battery into lower DC voltages used to power lights, wipers, and window controls which requires less than 12V.
- Speed controllers for DC motors as it regulates the power supply.
- Lighting and lamp controls
Applications of DC-AC converter:
- DC power source usage as it converts the DC power source to an AC supply and can be used in AC appliances.
- Uninterruptible power supplies(UPS) as it is a piece of mandatory equipment in it.
- Used in PV systems as it generates DC power supply.
- HVDC power transmission as it has lesser losses compared to HVAC transmission.