Bilateral magnetic flux switching type magnetic suspension permanent magnet linear synchronous motor and control method thereof

Abstract

The invention provides a bilateral magnetic flux switching type magnetic suspension permanent magnet linear synchronous motor and a control method thereof, and relates to the technical field of rail transit equal-length stator occasions. The motor comprises a long secondary supporting body, a supporting shell, an upper primary module and a lower primary module. The upper primary module is connected to the inner upper portion of the supporting shell, the lower primary module is arranged on the inner lower portion of the supporting shell, and the upper primary module and the lower primary module are vertically symmetrical. During stable operation, a position and speed sensor measures the speed and position change of the upper primary module, and the motor current torque component iq is controlled by adopting a control strategy of id=0 to increase or decrease the electromagnetic thrust. During stable suspension control, a gravitational acceleration sensor obtains the change of the gravity of a motor rotor, and the lower primary module adopts an iq=0 control strategy to control a motor current excitation component id so as to increase or demagnetize a magnetic field. The motor has the advantages of simple structure, low cost and high efficiency, solves the problem of stable suspension, and eliminates the friction during the operation of the motor.

Description

technical field [0001] The invention relates to the technical field of rail transit and other long stator occasions, in particular to a bilateral magnetic flux switching type magnetic levitation permanent magnet linear synchronous motor and a control method thereof. Background technique [0002] With the rapid development of urban rail transit, the application of linear motors in this field has attracted widespread attention. For the field of long-distance rail transit, whether the traditional permanent magnet synchronous motor lays the coil or the permanent magnet along the track, the cost will be very expensive, and the later maintenance will be troublesome, but the flux switching linear motor can guide the magnet The core is laid along the track, and its permanent magnet and armature winding are placed on the primary mover, which can greatly reduce the cost of track laying and subsequent maintenance costs, and has both the high power density of the permanent magnet synchr...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a bilateral magnetic flux switching type magnetic levitation permanent magnet linear synchronous motor and its control method to solve the problem of the magnetic flux switching type magnetic levitation permanent magnet linear synchronous motor with only one set of windings. The problem of complex motor control and large thrust fluctuations

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