Dynamic estimation of supply current for electric motor drive
AssigneeSteering Solutions IP Holding Corporation
InventorsPrerit Pramod, Aparna Saha, Infane O. Lowe
Life of this patent
Estimating the term…
Abstract
According to one or more embodiments of the technical solutions described herein, an example method includes determining an input voltage (Vinv) of an inverter in a power circuit. The method further includes measuring an input current (Ii) of the inverter. The method further includes estimating a power supply current from a power supply of the power circuit based on the input voltage and the input current using a state observer and a plant model of the power circuit, the power supply current estimated at a non-steady state. The method further includes performing an active power management of a motor that receives electric power via the inverter.
Claims16
A method comprising:
- determining an input voltage (Vinv) of an inverter in a power circuit;
- measuring an input current (Ii) of the inverter;
- estimating a power supply current from a power supply of the power circuit based on the input voltage and the input current using a closed-loop state observer with tunable parameters and a plant model of the power circuit, the power supply current estimated in real-time in a dynamic state, wherein the power circuit includes at least a bulk capacitor, a common mode choke, and one or more electrical traces, and wherein the plant model includes a representation of at least one of an inductance, a resistance, and a capacitance of the bulk capacitor, the common mode choke, and the one or more electrical traces of the power circuit;
- and
- performing an active power management of a motor that receives electric power via the inverter.
An apparatus comprising:
- a power supply;
- an inverter;
- a power input circuit;
- and
- a processor configured to estimate a power supply current from the power supply, the estimation comprising:
- determining an input voltage (Vinv) of the inverter;
- measuring an input current (Ii) of the inverter;
- estimating the power supply current based on the input voltage and the input current using a state observer and a plant model of the power input circuit, the power supply current estimated in real-time in a dynamic state, wherein the power circuit includes at least a bulk capacitor, a common mode choke, and one or more electrical traces, and wherein the plant model includes a representation of at least one of an inductance, a resistance, and a capacitance of the bulk capacitor, the common mode choke, and the one or more electrical traces of the power circuit;
- and
- performing an active power management of a motor that receives electric power via the inverter.
A steering system, comprising:
- an inverter;
- a power input circuit;
- and
- a processor configured to estimate a power supply current from a power supply, the estimation comprising:
- determining an input voltage (Vinv) of the inverter;
- measuring an input current (Ii) of the inverter;
- estimating the power supply current based on the input voltage and the input current using a closed-loop state observer with tunable parameters and a plant model of the power input circuit, the power supply current estimated in real-time in a dynamic state, wherein the power circuit includes at least a bulk capacitor, a common mode choke, and one or more electrical traces, and wherein the plant model includes a representation of at least one of an inductance, a resistance, and a capacitance of the bulk capacitor, the common mode choke, and the one or more electrical traces of the power circuit;
- and
- performing an active power management of a motor that receives electric power via the inverter.
Dependencies are inferred from the claim text.