Resolver Decoder Hardware Filtering for Real-Time Shaft Angle Estimation

The patent replaces complex software-based angle estimation algorithms with a dedicated hardware resolver decoder circuit that performs the same function through specialized electronic components. This hardware implementation includes signal conditioning circuits, coordinate transformation units, and angle calculation modules that physically compute the motor shaft angle from resolver signals, eliminating the need for high-power general-purpose processors while maintaining measurement precision.

The resolver decoder circuit is designed as an integrated multi-functional unit that simultaneously performs signal filtering, coordinate transformation, angle calculation, and error compensation within a single hardware architecture. This universal design consolidates multiple separate processing functions into one device, reducing overall system complexity while preserving accurate angle estimation capability.

The patent segments the angle estimation function from the main CPU by implementing a dedicated resolver decoder circuit. This separation divides the control system into independent functional modules: the hardware decoder handles real-time angle calculation from resolver signals, while the CPU focuses on higher-level control algorithms. This segmentation enables parallel processing where the hardware circuit operates independently at high speed without burdening the CPU, thus improving both precision and real-time performance.

The resolver decoder circuit acts as an intermediary between the resolver sensor and the CPU control system. It receives raw resolver signals, performs real-time signal conditioning and angle computation, then outputs processed angle data to the CPU. This intermediary hardware layer filters and pre-processes signals before CPU intervention, reducing the computational burden on the CPU while ensuring accurate real-time angle measurement is achieved through dedicated hardware processing.