Abstract: A power supply circuit includes at least two input terminals that receive an input voltage, a transformer including a primary side electrically connected to the input voltage, a rectifier electrically connected to a secondary side of the transformer, and a boost switch electrically connected in parallel with the rectifier and a pair of output voltage terminals that include a first output voltage terminal and a second output voltage terminal. The input voltage is electrically connected to an AC source, and each of the at least two input terminals receives a different phase of the AC source.

Abstract: A power supply circuit includes a matrix converter that converts a first to third input alternating current (AC) phases into a single primary phase, a transformer including a primary side electrically connected to the single primary phase, a rectifier electrically connected to a secondary side of the transformer, and an output voltage terminal electrically connected to the rectifier. The matrix converter includes first through sixth bi-directional switch pairs, and each of the first through sixth bi-directional switch pairs includes first and second uni-directional switches. When the third input AC phase is disconnected or short circuited, the second and the fifth bi-directional switch pairs are turned off, and, in each of the first, third, fourth, and sixth bi-directional switch pairs, one of the first and second uni-directional switches are turned on and the other of the second and first uni-directional switches are operated as a full-bridge phase-shifted converter.

Abstract: A transformer assembly includes a top core, a bottom core under the top core, a primary winding that is multi-layered and that extends around each of the top core and the bottom core, and a secondary winding that is multi-layered and that extends around each of the top core and the bottom core. The primary winding extends around the top core and the bottom core such that, when current flows in the primary winding, magnetic flux is canceled or substantially canceled in a region between the top core and the bottom core. A converter assembly includes the transformer assembly, a primary-side circuit including the primary windings, and a secondary-side circuit including the secondary windings.

Abstract: A converter includes input voltage terminals, a series circuit connected to the input voltage terminals and including first and second switches connected in series, a transformer including a primary winding and a secondary winding, a resonant tank connected to the series circuit and including the primary winding, an auxiliary switch connected to the series circuit and the resonant tank, output voltage terminals connected to the secondary winding, and a controller that, based on a single control loop and a single control parameter, controls the auxiliary switch with pulse-width modulation and controls the first and second switches with pulse-frequency modulation.

Abstract: A converter with soft start includes a transformer; first and second switches connected to the transformer to supply power to the transformer; a controller connected to the first and second transistors and arranged to, during startup of the converter, switch the first switch with a variable duty cycle and switch the second switch with either a fixed duty cycle or a variable duty cycle with pulses larger than pulses of the variable duty cycle of the first switch; and a bleed device arranged to set initial conditions of the converter before startup of the converter by discharging a capacitor in the converter before startup.

Abstract: An LLC converter includes a transformer that includes a primary winding and a secondary winding, a resonant stage that includes the primary winding, a switching stage that includes switches and that is connected to an input voltage and the resonant stage, a rectifying stage that is connected to the secondary winding and that provides an output voltage, and a controller that senses the output voltage and that controls switching of the switches based on proportional-integral control of the output voltage to reduce errors in the output voltage with respect to a DC voltage and based on quasi-resonant control of the output voltage to reduce errors in the output voltage with respect to a range of voltages with a frequency bandwidth.

Abstract: A power supply circuit includes at least two input terminals that receive an input voltage, a transformer including a primary side electrically connected to the input voltage, a rectifier electrically connected to a secondary side of the transformer, and a boost switch electrically connected in parallel with the rectifier and a pair of output voltage terminals that include a first output voltage terminal and a second output voltage terminal. The input voltage is electrically connected to an AC source, and each of the at least two input terminals receives a different phase of the AC source.

Abstract: A transformer assembly includes a transformer with primary windings located on multiple layers and with secondary windings interleaved with the multiple layers and includes a substrate connected to the transformer and with a first transistor with first, second, and third terminals, in which the first terminal is connected to the secondary windings, the second terminal is connected to an output terminal of the transformer assembly, and the third terminal is a control terminal; first conductive layers; second conductive layers interleaved with the first conductive layers; a first via that is solid filled and that connects the first conductive layers and the first terminal; and a second via that is solid filled and that connects the second conductive layers and the second terminal.

Abstract: A converter includes input voltage terminals, a series circuit connected to the input voltage terminals and including first and second switches connected in series, a transformer including a primary winding and a secondary winding, a resonant tank connected to the series circuit and including the primary winding, an auxiliary switch connected to the series circuit and the resonant tank, output voltage terminals connected to the secondary winding, and a controller that, based on a single control loop and a single control parameter, controls the auxiliary switch with pulse-width modulation and controls the first and second switches with pulse-frequency modulation.

Abstract: A converter includes a half-bridge circuit including first and second transistors that are connected in series, the half-bridge circuit is connected in parallel with a voltage input and includes a node connected to both the first and second transistors; a resonant inductor connected to the half-bridge circuit and the primary winding of a transformer; a resonant capacitor connected to the half-bridge circuit and the primary winding; a third transistor with a first terminal connected to the half-bridge circuit and a second terminal directly connected to a first terminal of the resonant inductor; and a rectification stage that is connected to the secondary winding of the transformer and that includes first and second synchronous rectifiers. The rectification stage does not use discrete diodes to provide rectification, and during voltage boost operation, the third transistor is turned on and off to maintain an output voltage level.

Abstract: An LLC converter includes a transformer that includes a primary winding and a secondary winding, a resonant stage that includes the primary winding, a switching stage that includes switches and that is connected to an input voltage and the resonant stage, a rectifying stage that is connected to the secondary winding and that provides an output voltage, and a controller that senses the output voltage and that controls switching of the switches based on proportional-integral control of the output voltage to reduce errors in the output voltage with respect to a DC voltage and based on quasi-resonant control of the output voltage to reduce errors in the output voltage with respect to a range of voltages with a frequency bandwidth.

Abstract: An LLC resonant converter includes a first phase with a first primary circuit and a second phase with a second primary circuit. The first primary circuit includes a first shared inductor, and the second primary circuit includes a second shared inductor. The first and second shared inductors are connected in parallel with each other. The first and second primary circuits do not include a capacitor that is connected in parallel with each other.

Abstract: A method of commutation in a matrix rectifier from an active vector to a zero vector includes two steps. A method of commutation in a matrix rectifier from a zero vector to an active vector includes three steps.

Abstract: A method of commutation in a matrix rectifier from an active vector to a zero vector includes two steps. A method of commutation in a matrix rectifier from a zero vector to an active vector includes three steps.

Abstract: An LLC resonant converter includes a first phase with a first primary circuit and a second phase with a second primary circuit. The first primary circuit includes a first shared inductor, and the second primary circuit includes a second shared inductor. The first and second shared inductors are connected in parallel with each other. The first and second primary circuits do not include a capacitor that is connected in parallel with each other.

Abstract: A matrix rectifier includes a bridge x defined by phases A and B and a bridge y defined by phases A and C, in which each input phases A, B, and C includes two bi-directional switches connected in series. A method of operating the matrix rectifier includes operating the bridges x and y as independent full-bridge phase-shifted converters in each 60° interval between two successive zero-voltage crossings of the input phases A, B, and C. In a first 30° sector of each 60° interval, the bridges x and y are operated in a first vector sequence in every switching period, and the first vector sequence is divided into a sequence of x+, y+, 0, x?, y?, 0.

Abstract: A method of commutation in a matrix rectifier from an active vector to a zero vector includes two steps. A method of commutation in a matrix rectifier from a zero vector to an active vector includes three steps.

Abstract: A converter includes a transformer including primary windings and secondary windings, switches connected to the primary windings, an output inductor connected to the secondary windings, and a controller connected to the switches. The controller turns the switches on and off based on dwell times calculated using space vector modulation with a reference current ref whose magnitude changes with time.

Abstract: A matrix rectifier includes a bridge x defined by phases A and B and a bridge y defined by phases A and C, in which each input phases A, B, and C includes two bi-directional switches connected in series. A method of operating the matrix rectifier includes operating the bridges x and y as independent full-bridge phase-shifted converters in each 60° interval between two successive zero-voltage crossings of the input phases A, B, and C. In a first 30° sector of each 60° interval, the bridges x and y are operated in a first vector sequence in every switching period, and the first vector sequence is divided into a sequence of x+, y+, 0, x?, y?, 0.

Abstract: A method of commutation in a matrix rectifier from an active vector to a zero vector includes two steps. A method of commutation in a matrix rectifier from a zero vector to an active vector includes three steps.