The present disclosure provides a three-phase AC/DC converter aiming for low input current harmonic. The converter includes an input stage for receiving a three-phase AC input voltage, an output stage for at least one load, and one or more switching conversion stages, each stage including a plurality of half bridge modules. The switches in each module operate with a substantially fixed 50% duty cycle and are connected in a specific pattern to couple a DC-link and a neutral node of the input voltage. The AC/DC converter further includes one or more controllers adapted to vary the switching frequency of the switches in the switching conversion stages based on at least one of load voltage, load current, input voltage, and DC-link voltage. The converter can also include one or more decoupling stages, such as, inductive components adapted to decouple the output stage from the switching conversion stages.

An active bridge rectifying control apparatus includes a bridge rectifying unit and a rectifying control module. The rectifying control module includes a phase control unit, a low-side drive unit, and a self-drive unit. The phase control unit provides a live line signal and a ground line signal according to a positive half cycle and a negative half cycle of an AC power source. The low-side drive unit provides a low-side control signal according to the live line signal and the ground line signal. The self-drive unit establishes a drive voltage according to the positive half cycle and the negative half cycle of the AC power source, and provides a high-side control signal according to the low-side control signal. The bridge rectifying unit rectifies the AC power source into a DC power source according to the low-side control signal, the high-side control signal, and the drive voltage.

The invention discloses systems (100) and methods (200, 300) for reducing the effect of even-order harmonics in supply voltage on the DC side components in AC-DC converters having any kind of controlled power electronic switches or their combinations. The method involves modifying the time of firing the various switches (112, 114) through a control logic arrives at through either measuring or estimating the DC bus voltage or the input AC voltage. The proposed control methods are useful in ASDs where full bridge configuration is used for AC to DC conversion. The proposed control may also be used in ASDs where a half bridge rectifier system is used. The proposed method reduces the stress on the DC bus capacitor and increases the lifetime of the capacitor. It further reduces the peak current through the device, which reduces stress on the rectifier components. It also reduces the Total Harmonic Distortion (THD.sub.i) of the line current.

A power receiver (301a, 301b, 301c, 301d, 301e, 301f) is disclosed herein. In a specific embodiment the power receiver has a first electrode (300) arranged to be electrically coupled to a body (105) of a living being, the first electrode (300) operable to receive an electrical signal via the body; and a rectifier (307) for rectifying the electrical signal into a rectified electrical signal. The rectifier (307) includes a plurality of rectifier switches and operable in a bulk biasing mode in which first selected rectifier switches of the plurality of rectifier switches are forward bulk biased. A power transmitter (201), an energy transfer apparatus (100) and a method of transmitting electrical power are also disclosed.

A multi-phase interleaved PFC converter includes at least six switches coupled in a multi-phase interleaved circuit arrangement, and a control circuit. The control circuit is configured to turn on and turn off a first one of the switches according to a PWM signal to operate the first switch as an active switch having an off-time as a function of a duty cycle of the PWM signal, while turning on and turning off a second one of the switches as a synchronous switch. The control circuit is also configured to receive signal(s) indicative of currents in each phase of the interleaved circuit arrangement, set an on-time of the second switch equal to the off-time of the first switch when the signal(s) indicate continuous mode operation, and set the on-time of the second switch to a duration less than the off-time of the first switch when the signal(s) indicate discontinuous mode operation.

A three-phase synchronous rectifier for charging a battery on board the vehicle, comprising a first and a second input which are independent of each other and each connectable to a respective first and second three-phase output branch of a generator, two independent negative and positive outputs each connectable to the respective poles of the battery, a first group of three rectification units configured to be connected to the first output branch of the generator via said first input, a second group of three rectification units configured to be connected to the second output branch of said generator via the second input. Advantageously, the rectification units are configured to be simultaneously connected to the battery of the vehicle.

A synchronous rectifier includes: a rectifying circuit including transistors, the rectifying circuit being configured to generate rectified power by rectifying input power input to an input terminal of the rectifying circuit depending on switching operations of the transistors, and output the rectified power to an output terminal of the rectifying circuit; and a controller configured to apply a gate signal to each of the, and adjust a pulse width of the gate signal depending on a difference between the input power and the gate signal.

A high-frequency isolation alternating/direct current conversion circuit and a control method thereof are disclosed. The conversion circuit includes an alternating current source, a direct current source, a resonant capacitor, a high-voltage energy-storage filter, a high-frequency inverter bridge, a drive circuit, a resonant inductor, a high-frequency isolation transformer, a direct current side synchronous switch, a control circuit, and the like. The conversion circuit is made to be switched between two working modes, a rectification mode and an inversion mode by using a preset direct current source reference voltage as a reference, according to an external voltage reference, and by using different turn-on working modes of the high-frequency inverter bridge.

A regulator rectifier device and a method for regulating an output voltage of the same which takes input from three phase alternating current voltage generating device with each phase including a positive cycle and a negative cycle. A first rectifying unit with a first gate terminal, connected to the generating device to rectify the positive cycle of said three phase alternating current voltage. A second rectifying unit with a second gate terminal, connected to said generating device to rectify the negative cycle of said three phase alternating current voltage, wherein said second rectifying unit switches between rectification mode and shunt mode depending on the load condition. And a controlling unit configured to control said second rectifying unit by a gate control signal, said controlling unit outputs said gate control signal based on an output voltage of said regulator rectifier device with respect to a first predefined voltage in battery connected condition or third predefined voltage in battery-less condition and said positive cycle and said negative cycle of each phase of said three phase alternating current voltage from said generating device, said gate control signal enables said second rectifying unit to switch between rectification mode and shunt mode by controlling the second gate terminal of said second rectifying unit, wherein said gate control signal switches said second rectifying unit into shunt mode when the output voltage of said regulator rectifier device is greater than said first predefined voltage in battery connected condition or third predefined voltage in battery-less condition and thereby continuing the shunting of said second rectifying unit as long as said positive cycle of corresponding phase of said three phase alternating current voltage exists.

An inductive power receiver 3 including at least two switches S.sub.1, S.sub.2 connected across a resonant circuit 802, the resonant circuit including an inductance and a capacitance, wherein a first switch S.sub.1 of the at least two switches is configured to switch into a first state based on a first event dependent on a receiver variable; and the first switch is configured to switch to a second state based on a second event independent of a receiver variable.