A controller for a power converter and method of operating the same employable with a bridge rectifier having first and second synchronous rectifier switches. In one embodiment, the controller includes an amplifier configured to enable a turn-on delay for the first synchronous rectifier switch. The controller also includes a discharge switch having first and second switched terminals coupled to gate and source terminals, respectively, of the first synchronous rectifier switch and configured to discharge a gate-to-source capacitance of the first synchronous rectifier switch to enable a turn off thereof.

Controller for a synchronous rectifier switch

A controller for a power converter and method of operating the same. In one embodiment, the controller includes an inductor-inductor-capacitor (“LLC”) controller configured to receive an error signal from an error amplifier to control a switching frequency of an LLC stage of the power converter to regulate an output voltage thereof. The controller also includes a power factor correction (“PFC”) controller configured to control a bus voltage produced by a PFC stage of the power converter and provided to the LLC stage so that an average switching frequency thereof is substantially maintained at a desired switching frequency.

Controller for a power converter and method of operating the same

A controller for a power converter, and method of operating the same. The controller improves power converter operating efficiency by regulating an internal power converter operating characteristic depending on a value of a power converter parameter measured after a manufacturing step, or an environmental parameter, preferably employing a table with entries dependent on the parameter value. The internal operating characteristic may be an internal bus voltage, a voltage level of a drive signal for a power switch, a number of paralleled power switches selectively enabled to conduct, or a basic switching frequency of the power converter. The controller may regulate an internal operating characteristic of the power converter using a functional relationship dependent on the parameter value. The environmental parameter may be received as a signal from an external source. The parameter measured after a manufacturing step may be a parameter measured from representative power converter(s).

Power converter with an adaptive controller and method of operating the same

A controller includes a voltage determination module, a bus voltage command module, and a power factor correction (PFC) control module. The voltage determination module determines a desired direct current (DC) bus voltage for a DC bus electrically connected between a PFC module and an inverter power module that drives a compressor motor. The voltage determination module determines the desired DC bus voltage based on at least one of torque of the compressor motor, speed of the compressor motor, output power of the inverter power module, and drive input power. The bus voltage command module determines a commanded bus voltage based on the desired DC bus voltage. The PFC control module controls the PFC module to create a voltage on the DC bus that is based on the commanded bus voltage.

Power factor correction with variable bus voltage

A power converter employing a control system configured to make multiple functional use of a circuit node therein and method of operating the same. In one embodiment, the power converter includes a power train including at least one power switch. The power converter also includes a control system including an opto-isolator circuit, including a resistor, configured to receive an output signal from the power converter and provide a feedback signal to a feedback node for the control system to provide a switch control signal for the at least one power switch. The control system also includes a current source configured to produce multiple voltage levels at the feedback node in accordance with the resistor, thereby enabling multiple functional uses of the feedback node.

Control system for a power converter and method of operating the same

This AC/DC converter is an isolated converter with switch-mode current regulation by means of a controlled switch (5). The controlled switch (5) is protected by a current limiting device (9, 7) obeying a peak current setpoint proportional to the instantaneous voltage from the power supply source (Vin). This allows the quality of the absorbed current to be improved and the risks of interference from the switch-mode power supply to be limited while at the same time satisfying the new demands on avionics power networks.

Ac/Dc Converter with Low Anharmonic Currents

This AC/DC converter is an isolated converter with switch-mode current regulation by means of a controlled switch ( 5 ). The controlled switch ( 5 ) is protected by a current limiting device ( 9, 7 ) obeying a peak current setpoint proportional to the instantaneous voltage from the power supply source (Vin). This allows the quality of the absorbed current to be improved and the risks of interference from the switch-mode power supply to be limited while at the same time satisfying the new demands on avionics power networks.

AC/DC converter with low harmonic currents

The inventive converter is embodied in the form of an insulated current-hash converter adjustable by means of a controlled switch (5). Said controlled switch (5) is protected by a current-limiting device (9,7) responsive to a peak current instruction proportional to the instantaneous voltage (Vin) of a power supplying source, thereby making it possible to improve the quality of absorbed current and to limit the risk of disturbances of switch-mode power supply and to satisfy the new requirements of avionic networks.

Anharmonic low-current ac-dc converter

Ce convertisseur AC/DC est un convertisseur isole a regulation par hachage du courant au moyen d~un interrupteur commande (5). L~interrupteur commande (5) est protege par un dispositif de limitation de courant (9, 7) obeissant a une consigne de courant crete proportionnelle a la tension instantanee de la source d~alimentation (Vin). Cela permet d~ameliorer la qualite du courant absorbe et limite les risques de perturbations de l~alimentation a decoupage tout en satisfaisant aux nouvelles exigences des reseaux avioniques.

Convertisseur ac/dc a faibles courants anharmoniques

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Ac/Dc Converter with Low Anharmonic Currents

AC/DC converter with low harmonic currents

Anharmonic low-current ac-dc converter

Convertisseur ac/dc a faibles courants anharmoniques