Sensorless Synchronous Machine Module for Aircraft Drive

The patent extracts the rotor position determination function from the mechanical resolver system and relocates it to the electronic control domain through sensorless estimation algorithms. The observer model extracts position information from electrical signals (currents and voltages) rather than requiring a physical resolver, thereby eliminating the resolver hardware while maintaining position detection capability.

The patent replaces the mechanical resolver system with an electronic sensorless estimation system. Instead of using a physical resolver to mechanically determine rotor position, the system uses mathematical models and electrical signal processing to estimate position electronically, substituting a mechanical measurement system with an electronic computation system.

The patent implements a dynamic adaptation mechanism where the observer model parameters and estimation algorithms are adjusted based on the current operating conditions, particularly rotational speed. At low speeds, the system modifies the observer gains and uses adaptive filtering to maintain estimation accuracy, allowing the sensorless system to perform accurately across the entire speed range rather than being limited to high speeds only.

The patent changes the operational parameters of the estimation system based on rotational speed. The observer model uses different parameter sets and filtering characteristics depending on whether the machine is operating at low, medium, or high speeds. This parameter adaptation enables the sensorless system to maintain measurement precision across varying operating conditions without requiring additional hardware.

The patent introduces a feedback mechanism where the estimated rotor position and speed are continuously fed back to the control system. The observer model provides real-time position estimation that enables closed-loop control during the run-up phase. This feedback allows the system to detect and compensate for engine tilting by adjusting the torque profile, maintaining stability while preserving the simplicity of controlled operation.

The patent applies preliminary action by using the observer model to predict rotor position and speed before actual measurement is possible. During the start-up phase, the system performs preliminary estimation and adjustment of control parameters to prevent engine tilting before it occurs. The torque-generating current is proactively adjusted based on predicted operating conditions, ensuring stable run-up without requiring reactive corrections.