Alternating-current servo flux-weakening speed-regulating method
A technology of field-weakening speed regulation and AC servo, which is applied in the direction of AC motor control, generator control, electronic commutation motor control, etc. It can solve the problems of dynamic response and control accuracy that cannot reach performance, and achieves the improvement of fast response performance, The effect of improving control accuracy and avoiding parameter drift
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[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] Since the voltage and current of the motor and the inverter are limited, the terminal voltage and stator current of the motor cannot exceed the limit value u when the motor is running. smax i smax , the voltage and current limit equations are shown in formula (1) and formula (2) respectively:
[0019] (L d i d +ψ f ) 2 +(L q i q ) 2 ≤(u smax / ω r ) 2 (1)
[0020] i d 2 + i q 2 ≤ i s max 2 - - - ( 2 )
[0021] Among them, ω r is the rotational speed, ψ f is the flux linkage, L d , L q is the direct and quadrature axis inductance, i d i...
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