A Novel Position Tracking Control Method for Energy Storage Process of Mechanical Elastic Energy Storage System
A mechanical elastic energy storage and system energy storage technology, which is applied in the field of motors, can solve the problems of the reduction of the counter-torque moment of inertia and the inability to guarantee the stable operation of the system, and achieve the effect of smooth operation of the speed and simple control equations
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[0049] The present invention is realized by the following technical solutions:
[0050] 1. Mathematical model of mechanical elastic energy storage system
[0051] The mechanical elastic energy storage system consists of figure 1 As shown, the power grid drives the PMSM to achieve stable and efficient energy storage through the inverter under the control strategy of the present invention.
[0052]The mathematical model of PMSM in the d, q axis coordinate system can be written as:
[0053] Stator current equation
[0054]
[0055] Stator Flux Equation
[0056]
[0057] Rotor equation of motion
[0058]
[0059] Electromagnetic Torque Equation
[0060] T e =1.5n p ψ f i q (4)
[0061] In the formula: u d , u q , are stator d, q axis voltage respectively; i d , i q Respectively stator d, q axis current; R is stator resistance; L is stator inductance; n p is the number of pole pairs; ω is the rotational angular velocity of the motor; ψ f is the rotor flux ...
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