An advanced controller design for a sensorless interior permanent-magnet synchronous motor control system is proposed. A maximum torque/ampere control algorithm is used to improve the torque performance of the drive system. In addition, an adaptive controller combined with the maximum torque/ampere control is proposed to obtain a good transient response and a good load disturbance rejection capability. The proposed control method can be applied to both a sensorless adjustable speed control system and a sensorless position control system. Using the Lyapunov stability theory and Barbalat’s lemma it is shown that the closed-loop sensorless control system is an asymptotical stable system. A 32-bit digital signal processor is used to execute the rotor position estimation algorithm and the control algorithm. Experimental results validate the theoretical analysis and show the correctness and feasibility of the proposed system.
Inspec keywords: machine control; transient response; rotors; closed loop systems; position control; adaptive control; permanent magnet motors; variable speed drives; digital signal processing chips; synchronous motor drives; Lyapunov methods; angular velocity control; asymptotic stability
Other keywords:
Subjects: Spatial variables control; Velocity, acceleration and rotation control; Drives; Control of electric power systems; Self-adjusting control systems; Synchronous machines
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