Electric Motor Load Determination via Current and Speed Integration

The patent applies preliminary action by pre-calculating and storing motor constants (such as inertia and friction coefficients) during a defined measurement run, so that during ongoing operation the controller can directly use these pre-determined values without requiring additional measurement procedures. This allows load values to be determined during normal operation while maintaining measurement accuracy.

The patent uses copying by creating a mathematical model (copy) of the motor's mechanical characteristics through the relationship between current, speed, and torque. Instead of performing physical measurements during operation, the system copies the load information through calculations based on measured electrical parameters and the pre-stored motor constants, enabling continuous load determination without interrupting operation.

The patent applies dynamics by making the motor constants adaptable rather than fixed. The controller can update the motor constants (inertia, friction) based on changing operating conditions, allowing the system to maintain measurement precision even when boundary conditions become complex or non-uniform during ongoing operation. This dynamic adaptation enables accurate load determination across varying operational states.

The patent uses parameter changes by modifying the motor constants used in load calculations based on the actual operating conditions. When boundary conditions change (such as different door masses, friction conditions, or acceleration profiles), the system adjusts the motor parameters to reflect current conditions, thereby maintaining measurement precision despite the variability in operational environment.

The patent applies merging by combining the determination of multiple load variables (torque, power, inertia, friction) into a unified calculation process. Instead of requiring separate measurement runs or additional sensors for each variable, the system calculates all load variables simultaneously from the same set of measured parameters (current and speed) and pre-stored motor constants, thereby reducing device complexity while maintaining adaptability.

The patent uses universality by creating a multi-functional calculation framework where the same motor constants and measurement data serve multiple purposes. The pre-determined motor characteristics are used to calculate different load variables (torque, power, inertia effects) depending on the operational context, allowing a single measurement and calculation system to provide comprehensive load information for various control and monitoring applications.