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Controllers for regulated power inverters, AC/DC, and DC/DC converters

  • US 10,205,401 B1
  • Filed: 04/24/2018
  • Issued: 02/12/2019
  • Est. Priority Date: 07/11/2017
  • Status: Active Grant
First Claim
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1. A switching converter capable of converting a 3-phase AC source voltage into a DC output voltage and providing a DC power output, wherein said 3-phase AC source voltage is characterized by three AC voltages, wherein an AC voltage is one of said three AC voltages, wherein said DC output voltage is characterized by a DC common mode voltage, wherein said switching converter comprises a 3-phase bridge comprising three pairs of switches and capable of providing three switching voltages, wherein a switching voltage is provided by a pair of switches controlled by a controller providing a 1st control signal and a 2nd control signal, and wherein a 1st switch of said pair of switches is controlled by said 1st control signal and a 2nd switch of said pair of switches is controlled by said 2nd control signal, said switching converter further comprising a digital signal processing apparatus performing numerical functions including:

  • a) a numerical integrator function operable to receive an integrator input and to produce an integrator output, wherein said integrator output is proportional to a numerical antiderivative of said integrator input;

    b) a digital lowpass filter operable to receive a filter input and to produce a filter output;

    c) a 1st numerical Schmitt trigger characterized by a hysteresis gap and a 1st reference level, and operable to receive a Schmitt trigger input and to produce said 1st control signal; and

    d) a 2nd numerical Schmitt trigger characterized by said hysteresis gap and a 2nd reference level, and operable to receive said Schmitt trigger input and to produce said 2nd control signal;

    wherein said integrator input comprises a sum of a 1-bit digital representation of said AC voltage and a 1-bit digital representation of a difference between said switching voltage and said DC common mode voltage, wherein said filter input comprises said integrator output, and wherein said Schmitt trigger input comprises said filter output.

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