6 results about "AC/AC converter" patented technology

Provided in the present application is an AC / AC converter. The AC / AC converter comprises a first conversion unit, a matching unit and a second conversion unit which are sequentially connected in series, wherein the first conversion unit is used for generating a first half-wave voltage, and performing polarity inversion on the first half-wave voltage, so as to generate a first alternating-current voltage having alternating positive and negative polarities; the second conversion unit is used for generating a second half-wave voltage, and performing polarity inversion on the second half-wave voltage, so as to generate a second alternating-current voltage having alternating positive and negative polarities; and the matching unit is used for generating a first matching voltage, with the first matching voltage being the difference between the first half-wave voltage and the second half-wave voltage.

The examples described here provide a circuit that includes a power electronics converter located in a vehicle, wherein the power electronics converter is designed to receive alternating current (AC) electrical power from an AC mains source and to supply AC electrical power to an AC load outside the vehicle. The power electronics converter includes an AC / AC converter comprising a rectifier and an inverter, the rectifier being electrically connected to the inverter via a direct current (DC) connection. The circuit further includes a vehicle-side charging module that is electrically connected to the power electronics converter and a battery located in the vehicle.The power electronics converter provides vehicle-to-load functionality by supplying AC electrical power to the AC load as a 120 Vac output and / or a 240 Vac output.

The invention discloses a combined AC / AC converter control method, and relates to the technical field of power electronic converter control. The combined AC / AC converter is formed by combining a passive rectifier bridge, a Boost converter and a DC / AC converter. Wherein the Boost converter is used for intermediate bus voltage control and AC input side power factor correction; the DC / AC converter dynamically divides carrier wave areas according to passive rectification output voltage and intermediate bus voltage amplitude, dynamically adjusts modulation wave amplitude in combination with alternating current input and output voltage phase relation, realizes rectification output current amplitude limiting and circulation-free power control while completing alternating current output voltage control, and further realizes active power optimization. Based on the control method, cooperative control of the Boost converter and the DC / AC converter can be achieved, the combined AC / AC converter has the technical advantages of being small in power conversion stage number and excellent in power factor, the system conversion efficiency can be effectively improved, the system cost can be effectively reduced, the power supply quality can be effectively improved, and the system operation reliability can be effectively improved.

This invention provides an integrated magnetically controlled transformer system and its method for stabilizing output voltage. The system includes a main transformer, an auxiliary transformer, an AC / AC converter, and a controller. The input of the main transformer is connected to a high-voltage power grid, and its output provides a main voltage containing disturbance components. The primary side of the auxiliary transformer is connected to the output of the AC / AC converter, and its secondary side is connected in series to the output circuit of the main transformer. The input of the AC / AC converter is connected to the output side of the main transformer. The controller samples the output voltage of the main transformer in real time and compares it with a set voltage value to generate a command signal for controlling the AC / AC converter. This allows the adjustable compensation voltage to cancel out the disturbance components in the main voltage in real time, thereby stabilizing the total output voltage after series superposition at the set voltage value. This system effectively isolates voltage disturbances on the power grid side, ensures voltage stability on the load side, has a fast response speed, high voltage regulation accuracy, and a compact and reliable structure.

The invention discloses a single-phase or three-phase on-load voltage regulation circuit of an industrial frequency transformer coupled AC-AC converter. The single-phase or three-phase on-load voltage regulation circuit comprises n or 3n AC-AC converters with a stepped voltage regulation function, a single-phase or three-phase industrial frequency transformer and a special coupling mode between the single-phase or three-phase industrial frequency transformer and the AC-AC converters. Two terminals of the primary side winding are led out to form an external port, the secondary side isolation winding is connected with alternating current input ports of the n or 3n alternating current-alternating current converters, output ports of the n or 3n alternating current-alternating current converters are sequentially connected in series, and the terminals are led out to form an on-load voltage regulation port. The problems that a mechanical switch contact is short in service life and a sensitive load is powered off are fundamentally solved, and meanwhile the system cost is effectively reduced; the turn ratio of each transformer can be flexibly set according to actual requirements, so that differentiated and refined voltage regulation requirements in different application scenes can be met; the system has good expandability, and can be flexibly adapted to application scenes of different power levels through series-parallel combination.

The examples described here show a circuit comprising a power electronics converter located in a vehicle. The power electronics converter serves to receive AC electrical power from an AC mains source and to supply AC electrical power to an AC load outside the vehicle. The power electronics converter includes an AC / AC converter. The circuit further includes an on-board charging module electrically connected to the power electronics converter and a battery located in the vehicle. The circuit also includes a controller for controlling the power electronics converter and the on-board charging module. The power electronics converter provides vehicle-to-load functionality by supplying AC electrical power as an output from a 120 Vac output and / or a 240 Vac output to the AC load.