Magnetic damping control method based on harmonic generator
A generator and magnetic damping technology, applied in magnetic circuit reluctance control, controlling generators, electrical components and other directions through magnetic field changes, can solve the problem of inability to obtain zero-sequence current value and inability to perform three-phase unbalanced magnetic damping control etc., to achieve the effect of effective magnetic damping control
Active Publication Date: 2021-11-26
HIWING TECH ACAD OF CASIC
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[0007] When the three-phase is balanced, the existing control strategy in Japan can meet the requirements of magnetic damping control. The internal power factor outputs energy, and the three-phase current will be in the same phase as the back EMF of the three-phase collector coil, so the three-phase current of the collector coil at this time is a three-phase unbalanced current, and the actual current of each phase cannot be obtained by formula (1). Zero-sequence current value, that is, magnetic damping control when three-phase unbalance cannot be performed
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[0044] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0045] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit t...
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The invention relates to the technical field of magnetic damping control, and discloses a magnetic damping control method based on a harmonic generator. The method comprises the following steps of: rectifying alternating current of the harmonic generator into direct current by using a three-phase four-bridge-arm converter; using an energy storage unit to store the direct current through a capacitor; collecting the current of a current collection coil of each phase of the harmonic generator by using a current sampler; calculating a zero-sequence current value of each phase according to the collected current of the current collection coil of each phase; obtaining a zero-sequence voltage instruction value of each phase through PI control according to the zero-sequence current value of each phase and a zero-sequence current instruction value of each phase; obtaining PWM converter modulation waves according to the zero-sequence voltage instruction values of all the phases and power generation control voltage instruction values of all the phases of the harmonic generator; performing PWM modulation on the modulation waves to generate PWM waves; converting the electric energy stored in the energy storage unit into zero-sequence current damping control value of each phase by controlling the on-off of a power electronic switching device through the PWM waves, and injecting the zero-sequence current damping control value of each phase into current collection coil of each phase so as to realize magnetic damping control.
Description
technical field [0001] The invention relates to the technical field of magnetic damping control, in particular to a magnetic damping control method based on a harmonic generator. Background technique [0002] The superconducting electric levitation maglev train generates a strong magnetic field through the on-board superconductor, and generates propulsion, levitation, and guidance forces through the interaction with the ground coil. The advantages of superconducting suspension technology are: 1. The suspension height is large, generally above 100mm; 2. The suspension does not need global control; 3. External power failure, as long as there is speed, the vehicle will not suddenly lose the suspension force; 4. No on-board excitation power supply is required ; 5. The superconducting coil is hollow and light in weight. Due to the above advantages of superconducting levitation technology, this technology is suitable for use in high-speed magnetic levitation. [0003] Because th...
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IPC IPC(8): H02P9/30H02P9/40H02M7/219
CPCH02P9/30H02P9/40H02M7/219
Inventor 张志华张艳清周皓楠蔡华马逊闫少强李秋君李鲁阳
Owner HIWING TECH ACAD OF CASIC