A solid state light source driver circuit that operates in either a buck convertor or a boost convertor configuration is provided. The driver circuit includes a controller, a boost switch circuit and a buck switch circuit, each coupled to the controller, and a feedback circuit, coupled to the light source. The feedback circuit provides feedback to the controller, representing a DC output of the driver circuit. The controller controls the boost switch circuit and the buck switch circuit in response to the feedback signal, to regulate current to the light source. The controller places the driver circuit in its boost converter configuration when the DC output is less than a rectified AC voltage coupled to the driver circuit at an input node. The controller places the driver circuit in its buck converter configuration when the DC output is greater than the rectified AC voltage at the input node.

A rectifier circuit applied in an AC/AC power supply, the rectifier circuit including: a filter circuit configured to receive a DC pulsating voltage, and to generate a supply voltage, where the supply voltage follows the DC pulsating voltage during a first time interval of an operation cycle; and where during a second time interval of the operation cycle, a value of the supply voltage is greater than the value of the supply voltage at an end of the first time interval, in order to reduce a size of the filter circuit.

According to the present embodiment, a DC transformation system includes a rectifier, a first power conversion device, a second power conversion device, and a control device. The rectifier rectifies AC power supplied from an AC power source and outputs a first DC voltage. The first power conversion device is connected in series to the rectifier and outputs a second DC voltage. The second power conversion device is connected in parallel to the rectifier and converts power supplied from the rectifier to supply the converted power to the first power conversion device. The control device controls the first power conversion device to cause an addition/subtraction voltage of the first DC voltage and the second DC voltage to be a predetermined voltage.

A solid state light source driver circuit that operates in either a buck convertor or a boost convertor configuration is provided. The driver circuit includes a controller, a boost switch circuit and a buck switch circuit, each coupled to the controller, and a feedback circuit, coupled to the light source. The feedback circuit provides feedback to the controller, representing a DC output of the driver circuit. The controller controls the boost switch circuit and the buck switch circuit in response to the feedback signal, to regulate current to the light source. The controller places the driver circuit in its boost converter configuration when the DC output is less than a rectified AC voltage coupled to the driver circuit at an input node. The controller places the driver circuit in its buck converter configuration when the DC output is greater than the rectified AC voltage at the input node.

A power controller for an AC power converter connected in series with a load and receiving power from or delivering power to a power source, the power controller comprising: a radial control block controlling a radial component of an electrical parameter of the AC power converter; and a chordal control block controlling a chordal component of the electrical parameter of the AC power converter. Also provided is a power system comprising one or more loads each connected in series to a power converter each controlled by a power controller as described above. There is also provided a method of controlling an AC power converter connected in series with a load and receiving power from a power source, the method comprising: controlling a radial component of an electrical parameter of the AC power converter; and controlling a chordal component of the electrical parameter of the AC power converter.

A rectifier circuit applied in an AC/AC power supply, the rectifier circuit including: a filter circuit configured to receive a DC pulsating voltage, and to generate a supply voltage, where the supply voltage follows the DC pulsating voltage during a first time interval of an operation cycle; and where during a second time interval of the operation cycle, a value of the supply voltage is greater than the value of the supply voltage at an end of the first time interval, in order to reduce a size of the filter circuit.

A multi-phase network power supply with compensation for harmonic oscillations relates to electrical engineering and is intended for supplying various electrical devices connected to a multi-phase alternating-current electrical network. The technical result of the claimed solution consists in lessening harmonic components, reducing pulsations in the voltage and current output by the power supply, and significantly reducing the required power. The multi-phase alternating-current network power supply with compensation for harmonic oscillations comprises a main multi-phase rectifier of the alternating-current network, an additional multi-phase rectifier, a controller and an additional voltage or current supply, wherein the positive terminal of the main multi-phase rectifier is capable of being connected to a load, and the negative terminal of the main multi-phase rectifier is connected to the positive terminal of the additional voltage or current supply, the negative terminal of which is capable of being connected to a load, the output terminals of the additional multi-phase rectifier are connected to the input terminals of the additional voltage or current supply, wherein the additional multi-phase rectifier is equipped with electronic switches, one in the circuit of each rectifying element, and each electronic switch is connected to the controller.

According to the present embodiment, a DC transformation system includes a rectifier, a first power conversion device, a second power conversion device, and a control device. The rectifier rectifies AC power supplied from an AC power source and outputs a first DC voltage. The first power conversion device is connected in series to the rectifier and outputs a second DC voltage. The second power conversion device is connected in parallel to the rectifier and converts power supplied from the rectifier to supply the converted power to the first power conversion device. The control device controls the first power conversion device to cause an addition/subtraction voltage of the first DC voltage and the second DC voltage to be a predetermined voltage.

A power controller for an AC power converter connected in series with a load and receiving power from or delivering power to a power source, the power controller comprising: a radial control block controlling a radial component of an electrical parameter of the AC power converter; and a chordal control block controlling a chordal component of the electrical parameter of the AC power converter. Also provided is a power system comprising one or more loads each connected in series to a power converter each controlled by a power controller as described above. There is also provided a method of controlling an AC power converter connected in series with a load and receiving power from a power source, the method comprising: controlling a radial component of an electrical parameter of the AC power converter; and controlling a chordal component of the electrical parameter of the AC power converter.

A multi-phase network power supply with compensation for harmonic oscillations relates to electrical engineering and is intended for supplying various electrical devices connected to a multi-phase alternating-current electrical network. The technical result of the claimed solution consists in lessening harmonic components, reducing pulsations in the voltage and current output by the power supply, and significantly reducing the required power. The multi-phase alternating-current network power supply with compensation for harmonic oscillations comprises a main multi-phase rectifier of the alternating-current network, an additional multi-phase rectifier, a controller and an additional voltage or current supply, wherein the positive terminal of the main multi-phase rectifier is capable of being connected to a load, and the negative terminal of the main multi-phase rectifier is connected to the positive terminal of the additional voltage or current supply, the negative terminal of which is capable of being connected to a load, the output terminals of the additional multi-phase rectifier are connected to the input terminals of the additional voltage or current supply, wherein the additional multi-phase rectifier is equipped with electronic switches, one in the circuit of each rectifying element, and each electronic switch is connected to the controller.