Permanent Magnet Synchronous Motors Control: Sensorless and Field-Weakening Operation

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Current Reference Generator (torque to current, flux-weakening) 3-phase inverter D A D A + -Digital controller -+ + axes decoupling modulationPWM PMSM ∗ ∗ 𝑑∗ 𝑞∗ 𝑑 𝑒𝑔 𝑞 𝑒𝑔 𝑚∗ 𝑒∗ 𝑒𝑔 𝑑 ∗ 𝑞∗ 𝑑 𝑞 𝑎 𝑏 𝐷𝐶 ∗ ∗ 𝑙𝑖𝑚

position & speed estimation

1/ 𝑚𝑒

𝑚

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𝑟 𝑚

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Position & Speed Luenberger observer Error signal Position error feedback Est. rotor frame HF injection IPMSM BPF / HPF Estimator Est. rotor frame processing 𝜃 𝑚𝑒 𝑚𝑒 𝜃 𝑚𝑒 𝑖_𝑏 𝑖_𝑎

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LPF MTPA Current Reference Generator dq ab Space Vector PWM MOSFET 3-Phase Inverter

Speed & position estimation High-Frequency Flux Injection HPFHPF D A D A compensation iib D A D A i ib IPMSM

TMS320F2811 Digital Signal Controller

a b c

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𝑎𝑚 𝑙𝑒 𝑎𝑚 𝑙𝑒 𝜃 𝐶 𝐷 𝑎𝑚 𝑙𝑒 𝑎𝑚 𝑙𝑒 𝐶 𝐷 [ _{( )}( )] [ _{𝐶 𝐶 𝐷 𝐷}] [𝑖_𝑖 ] ( ) [ _{( )}( )] [ 𝐶 𝐶 𝐷 𝐷] [ 𝑖 𝑖 ] ( ) 𝜃 1 V V2 V2 V1 0 V V7 V₀ t t t PWM T 1

sample sample2 sample3 sample4

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