Power Supplies

This PLECS demo model shows the design of a two-stage LED driver circuit consisting of a boost-PFC for AC/DC conversion followed by a flyback converter for DC/DC conversion.

This PLECS demo model shows a dual active bridge (DAB) converter. The thermal behavior of the Wolfspeed C3M0030090K and C3M0065090D Silicon Carbide MOSFETs is included for this topology using the PLECS Thermal domain.

This PLECS demo model shows a Swiss Rectifier with an output power of 5 kW.

The PLECS demo model shows a buck converter with constant on-time control implemented using the PLECS State Machine block.

This PLECS demo model shows a two-phase series capacitor buck converter circuit with constant on-time control.

This PLECS demo model analyzes the performance of Type 2 and Type 3 analog compensators used in power supply units (PSUs). The analyzed PSU is a buck converter with modeled-in inductor and capacitor non-idealities. The role of the capacitor and its effective series resistance (ESR) on the plant zero and poles is discussed. Furthermore, the compensators' performance is analyzed with respect to the phase margin, system bandwidth, and rate of change in gain at the crossover frequency.

This PLECS demo model shows a grid-connected battery charger with cascaded AC/DC and DC/DC converters. The AC/DC converter is regulated by a digital PI controller to achieve power factor correction (PFC) and maintain the DC bus voltage at 300 VDC. The DC/DC converter is designed to provide a maximum 120 VDC output at a power rating of 1.4 kW.

This PLECS demo model shows an isolated DC/DC resonant converter operated under frequency control. The output voltage of the converter is controlled by changing the switching frequency of the semiconductors. Zero-Voltage Switching (ZVS) is used to reduce switching losses, allowing the operation of the converter at higher switching frequencies.

This PLECS demo model illustrates a neutral-point clamped (NPC), three-level voltage-source inverter. The NPC topology has been adopted for high power applications as it can achieve better harmonic reduction than traditional two-level voltage source inverters and the associated control strategies help to minimize semiconductor losses. This model is designed to deliver power to a 50 Hz, 130 VRMS grid from a dynamic DC source.

The isolated flyback converter is a commonly-used converter for small power supplies such as battery chargers for portable devices and for auxiliary power supplies in electronic equipment. In this report the control design of a flyback converter that provides three low-voltage DC output voltages from a single-phase mains source is explained.