eVTOL Motor Phase Control for Torque Gain Under Abnormal States

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Solution Overview

Problem

Existing electric aircraft propulsion systems face inefficiencies when motor control systems experience abnormalities, leading to increased energy consumption despite efforts to avoid driving stoppages.

Innovation Solution

A propulsion device that adjusts the current phase of the motor current based on the state of the moving object, allowing for increased motor torque without increasing current magnitude, thereby enhancing efficiency and reducing energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If the current magnitude is increased to increase motor torque during abnormal operation, then the motor torque increases, but the energy consumption increases

Engineering Contradiction:
Improvemotor torqueVSAvoidenergy consumption
Core Design Contradiction:
ForceVSUse of energy by moving object

Solution Approach 1:

The invention changes the phase parameter of the motor current instead of increasing current magnitude. By adjusting the current phase based on motor state information during abnormal operation, the system achieves increased motor torque while maintaining constant current magnitude, thereby resolving the contradiction between torque enhancement and energy consumption reduction

Inventive Principle:
Principle #35Parameter changes

2Force

If the current phase is adjusted to increase motor torque, then the motor torque increases, but the control complexity increases

Engineering Contradiction:
Improvemotor torqueVSAvoidcontrol complexity
Core Design Contradiction:
ForceVSDevice complexity

Solution Approach 1:

The invention implements a feedback mechanism where motor state information is continuously acquired and used to adjust the current phase. This closed-loop control approach enables automatic adaptation to abnormal conditions, achieving increased motor torque through phase adjustment while managing control complexity through systematic feedback processing

Inventive Principle:
Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enables increased motor torque and improved energy efficiency by optimizing motor current phase adjustment, thus enhancing the propulsion system's performance and reducing energy waste.

Implementation Method 1

a motor configured to be driven to propel the moving object

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20260042355A1Propulsion device, propulsion control device, and non-transitory computer readable storage medium
Publication Date: 2026.02.12 DENSO CORP
  • US20260042355A1 patent drawing
  • US20260042355A1 patent drawing
  • US20260042355A1 patent drawing

AI summary

A propulsion device includes a motor device and an inverter device. The motor device includes a motor. The propulsion device is configured to control the motor via the inverter circuit and adjust a current phase of a current vector according to a state of an eVTOL. The propulsion device may be capable of adjusting the current phase according to a command torque. The propulsion device may be capable of adjusting the current phase according to an abnormal state of the eVTOL. The propulsion device may be capable of adjusting the current phase according to a flight state of the eVTOL.