An integrated circuit (IC) assembly includes a first power stage adapted to receive an input voltage and a second power stage adapted to provide an isolated output voltage. The IC also includes a transformer coupled between the first and second power stages. The IC further includes a detuning circuit coupled to the transformer, and a receiver circuit coupled to the first power stage. The receiver circuit includes an integrator configured to integrate a switching signal within the first power stage.

A method for controlling switching of an electrical system comprising having at least one frequency-controlled switch arm, includes the following steps: closing a first top or bottom switch, implementing a predetermined downtime and opening a second switch, for a period corresponding to the control frequency, and then: opening the first switch, comparing the voltage measured at the midpoint with a voltage threshold, determining a second instant t2 at which the voltage measured at the midpoint crosses the voltage threshold, closing the second switch at the second instant t2, calculating a downtime DT adjusted according to a formula which is a function of the control frequency Fsw, a first instant t1 and a second instant t2, the adjusted downtime being implemented as of the subsequent switching.

Aspects of an efficient, wide voltage range, power converter system are described. In one example, a power converter system includes a first power converter, a second power converter, and a controller for the power converter. An input of the first power converter and an input of the second power converter are connected in series across an input voltage for the power converter system, and an output of the first power converter and an output of the second power converter are connected in parallel at an output of the power converter system. The controller is configured to regulate the second power converter and to determine whether or not to regulate the first power converter based on the input voltage for the power converter system and an output voltage of the power converter system, among other factors, for greater efficiency of the power converter system over wider input and output voltage ranges.

A multi-stage driver system includes a switched mode power circuit for providing power to different electrical load(s). Multi-stage driver system includes a control block including at least one microcontroller coupled to control operations of the switched mode power circuit. Switched mode power circuit includes a high voltage region, a low voltage region, and an isolation barrier. High voltage region of the switched mode power circuit includes a switched rectifier and a switched bridge circuit configured to produce a high voltage bidirectional pulse train signal for output to an isolation barrier. Low voltage region of the switched mode power circuit includes a rectification circuit coupled to the isolation barrier and at least one switched converter circuit coupled to the rectification circuit. Control block receives real-time input signals (e.g., analog voltage reading(s)) from the high and low voltage regions and responsively produces control signals to the high and low voltage regions.

A direct electrical power converter, DPX, that connects a primary port including a DC or AC energy source, with a secondary port including a DC or AC load, comprising a transformer or autotransformer; a first power switch between two nodes, having two power terminals and a first control terminal; and a second power switch between other different two nodes having two power terminals, and a second control terminal wherein said switches are configured to connect the primary port energy source to the secondary port load, through the transformer or autotransformer. The cited first and second power switches are configured to be operated simultaneously under the action of a logic control signal providing a conducting status with all the power switches being simultaneously in an On state or with all the power switches simultaneously in an Off state, connecting or disconnecting said transformer to said primary port and said secondary ports simultaneously.

A power conversion apparatus includes a switching circuit including multiple switching elements, and a control unit configured to control and switch the multiple switching elements included in the switching circuit at a predetermined switching frequency with a direct current voltage applied to an input terminal of the switching circuit. The switching circuit is configured to convert the direct current voltage applied to the input terminal and to output a converted electric current. The switching frequency is set such that the switching frequency and a main frequency component of a ripple occurring in the electric current are out of a frequency range used for communication with a vehicle-mounted receiver.

An isolated bidirectional converter and a method for controlling the same are provided. A primary winding or a secondary winding of a transformer module in the isolated bidirectional converter is connected in parallel with a first branch includes a first inductor and a first current sensor that arc connected in series, A current flowing through the first inductor is acquired by the first current sensor, and is proportional to a current flowing through a magnetizing inductor of the winding. Therefore, the current is controlled by modifying a duty cycle of a switch transistor on a bridge arm in the circuit, so that a. direct current component of a current flowing through the winding is modified indirectly, thereby avoiding magnetic bias on the magnetizing to inductor of the transformer module, and preventing the transformer module from being saturated.

The disclosure provides a single-stage isolated bidirectional converter and a control method thereof. The converter includes: a first full-bridge circuit unit, a half-bridge circuit unit, a second full-bridge circuit unit, a phase-shift inductor unit, a transformer and a filter capacitor. The transformer includes a first winding and a second winding, and the first winding is provided with a center tap. The center tap is connected to the first port, two ends thereof are connected to the midpoints of the two bridge arms of the first full-bridge circuit unit through the phase-shift inductor unit, and two ends of the second winding are connected to the midpoints of the two bridge arms of the second full-bridge circuit unit. Two ends of the first full-bridge circuit unit are connected to two ends of the half-bridge circuit unit; two ends of the half-bridge circuit unit are connected to two ends of the filter capacitor.

This application discloses a power electronic transformer wherein each phase includes a plurality of power conversion modules. Each power conversion module includes a rectifier AC/DC circuit, a direct current bus capacitor, and a direct current-direct current DC/DC circuit. In each power conversion module, an output end of the AC/DC circuit is connected to an input end of the DC/DC circuit; the direct current bus capacitor is connected in parallel to the output end of the AC/DC circuit; and input ends of all the AC/DC circuits are connected in series, and output ends of all the DC/DC circuits are connected in parallel. The power electronic transformer includes a relatively small quantity of power conversion modules, thereby reducing occupied space and costs.

A first capacitor is connected between a first connection point and a second connection point. A second capacitor is connected between a third connection point and a fourth connection point. A current sensor is provided between the first connection point and the third connection point. A sum of the third wiring length which is a length of wiring from the first connection point to the third connection point and the fourth wiring length which is a length of wiring from the second connection point to the fourth connection point is smaller than a sum of the first wiring length which is a length of wiring from a first input terminal to the first connection point and the second wiring length which is a length of wiring from a second input terminal to the second connection point.