Switch-mode circuits convert and control electrical power efficiently.
Switch-mode converters use transistors, diodes, inductors and capacitors to convert voltage and frequency with efficiencies above 90%. Classes: AC-DC, DC-DC, DC-AC, AC-AC. Control by PWM and feedback. Design concerns: losses, EMI, thermal.
A phone charger is an AC-DC switch-mode converter.
Power electronics controls energy flow efficiently, so it underpins drives, chargers, renewables and modern power supplies.
Switch-mode circuits convert and control electrical power efficiently.
Power electronics controls energy flow efficiently, so it underpins drives, chargers, renewables and modern power supplies.
Switches are either fully on or fully off, so they dissipate little power, unlike linear regulators that waste the voltage difference as heat.
Switching losses and electromagnetic noise rise with frequency, so designers balance size against efficiency and interference.
Typical applications include designing a switch-mode power supply for a laptop charger, building a motor drive that controls speed efficiently and converting battery power for a solar inverter.
Study "Electric vehicles and charging" first (topic 86 of 106 in Electrical Engineering). It covers the groundwork this topic builds on.
Switching loss vs conduction loss. Soft switching. Wide-bandgap SiC and GaN.
A phone charger is an AC-DC switch-mode converter.
The next topic is "Rectifiers", which builds directly on this one.
It is classed as Advanced in Electrical Engineering (topic 87 of 106). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Electrical Engineering.
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