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.
This PLECS demo model shows a Vienna Rectifier with an output voltage of 700 V and an output power of 12.25 kW. The simulation combines the electrical power circuit and the cascaded controls.
The TL431 is a reference voltage source that is commonly used in the control circuit of isolated power supplies. In this example, the design of a TL431-based type 2 voltage controller for a flyback converter is presented.
Active power factor correction (PFC) is used extensively in AC-DC converters since it allows the converter to meet harmonic standards without the need for a bulky and costly input filter that normally accompanies a passive AC-DC converter. In this application example, a single phase boost-type 600 W PFC converter is modeled in PLECS.
Space vector control is a popular technique used in the control of motor drives or three-phase rectifiers since it offers reduced switching losses and better utilization of the DC bus compared to conventional PWM control. This PLECS demo model demonstrates space vector control of a three-phase boost-type rectifier.
This PLECS demo model shows a DC-DC flyback converter operating in discontinuous conduction mode with two outputs. The model combines the electrical power circuit with a special magnetic circuit for the flyback transformer and the discrete controller.