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AN2388 Datasheet(PDF) 13 Page - STMicroelectronics |
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AN2388 Datasheet(HTML) 13 Page - STMicroelectronics |
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13 / 54 page  AN2388 Vector control of AC induction machines 13/54 Figure 8. Park transformation module 2.2.4 The (d,q)( α,β) projection (inverse Park transformation) The equations presented here transform the stator voltage expressed in a d,q rotating reference frame into a (α,β) orthogonal system: The outputs of this block are the components of the reference vector to be applied to the motor phases ( ) through space vector modulation. Figure 9. Voltage components in inverse Park transformation Figure 10. Inverse Park transformation module iα iβ Rotor Flux Position θλ ld lq Park () () () ( ) ⎪⎩ ⎪ ⎨ ⎧ − = − = r qref r dref ref r qref r dref ref V V V V V V λ λ β λ λ α θ θ θ θ sin sin sin cos r V Vd Vq Rotor Flux Position θλ r vβ vα Inverse Park |
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