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This paper presents an efficiency-optimized flux-weakening control scheme for permanent magnet synchronous machines (PMSM) incorporating speed regulation. It is robust to variations of DC bus voltage and load level with optimized efficiency, especially under light load conditions. The developed speed/flux-weakening controller (SFWC) automatically generates the required demagnetizing current and produces...
The rotor position of PMSM is estimated by a novel sliding mode observer (SMO) operating over a wide speed range including deep flux-weakening region. By properly selecting equivalent control feedback gains, the estimation error of rotor position is reduced in low speeds and fast convergence of SMO guaranteed in high speeds. Compared to other PMSM systems for direct-driven washers using Hall effect...
This paper presents a special flux-weakening control scheme for permanent magnet synchronous machines (PMSM) over wide speed range. In contrast to conventional two-loop (d-, q-axis) control methods, the proposed control scheme achieves both flux-weakening and speed control simultaneously using only one speed/flux-weakening controller. The controller automatically generates both the required demagnetizing...
This paper presents a special flux-weakening control scheme for permanent magnet synchronous machines (PMSM) over wide speed range. In contrast to conventional two-loop (d-, q-axis) control methods, the proposed control scheme achieves both flux-weakening and speed control simultaneously using only one speed/flux-weakening controller. The controller automatically generates both the required demagnetizing...
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