V According to how the devices within the convertersare switched, there are three possibilities:(1) Line frequency (naturally commutated) converters（工频变换器）(2)Switched(forced-commutated)converters（开关变换器）(3)Resonant and quasi-resonant converters（谐振变换器）
✓According to how the devices within the converters are switched, there are three possibilities: (1) Line frequency (naturally commutated) converters （工频变换器） (2)Switched (forced-commutated) converters（开关变 换器） (3)Resonant and quasi-resonant converters（谐振变换 器）
4InterdisciplinarynatureofpowerelectronicsStatic&rotatingPowerElectronicspower.circuitsequipmentvices,Power2ElectronicsContinuousdiscreteControlPowerelectronics is the interface betweenelectronicsandpower
4 Interdisciplinary nature of power electronics☆ Electronics Power Power Electronics Continuous, discrete Control Power electronics is the interface between electronics and power
Relationwith multiple disciplinesCircuitSystems andtheorySolid-statecontroltheoryphysicsSignalprocessingPowerSimulationandelectronicscomputingElectronicsTElectric1machinesElectromagneticsPowersystemsFigure 1-10 Interdisciplinary nature of power electronics.Power electronics is currently the most activediscipline in electric power engineering
Relation with multiple disciplines Power electronics is currently the most active discipline in electric power engineering
5.OperatingFeatureofPEsystems(1) Parasitic parameters of PE systemsPowerLoadwitchingconverterinputYYAY088YMSensorYYH(s)gainYYTransistorErrorgate driversignalHyPulse-widthSG(s)modulator0(0)ACompensatorMainly,ReferenceIvrefTinputa. Inductances of conductorb.Capacitance of junction
5. Operating Feature of PE systems (1) Parasitic parameters of PE systems Mainly, a. Inductances of conductor b. Capacitance of junction
6.PowerDevices and Components(1)PowerDevices-PowerSemiconductorSwitchAK(2)MagneticComponentsInductors(Transformers)(3) Capacitive ComponentsCapacitorsHT
(1) Power Devices－Power Semiconductor Switch (2) Magnetic Components－Inductors (Transformers) (3) Capacitive Components－Capacitors 6. Power Devices and Components A K C E G G A K