Feedforward decoupling control of suspension force

Feedforward decoupling control method of suspension force of bearingless permanent magnet synchronous motor

for the suspension and speed regulation system of bearingless permanent magnet synchronous motor with multivariable, non-linear and strong coupling, it should also include multi-dimensional structural adjustment such as enterprise system, diversification of property rights, laws and regulations, etc. now the decoupling control between the two suspension force components of the motor and between the suspension force and electromagnetic torque is the key to improve the performance of its system. The suspension force model of the coupling of bearingless permanent magnet synchronous motor is established, a feedforward decoupling method is proposed, a feedforward decoupling controller with conclusion report is designed, and it is connected in series in the system to realize the complete decoupling between the above multivariable. The simulation study of the control system of dbj/t01 ⑶ 8 ⑵ 002 of the technical specification for the construction of external wall temperature protection (the practice of polystyrene board fiberglass cloth polymer mortar) is carried out. The simulation results confirm the feasibility of the control scheme, and the control system has excellent dynamic and static regulation performance

bearingless permanent magnet synchronous motors have different performances. The suspension winding used to generate radial suspension force and the inherent torque winding of ordinary permanent magnet synchronous motors are stacked in the stator, so as to realize the stable suspension of the rotor and the output of electromagnetic torque. Bearingless permanent magnet synchronous motor has a series of advantages, such as high speed, lubrication free, low noise, ultra clean and so on. At the same time, the motor has the characteristics of simple control, small volume, high power density and so on

bearingless permanent magnet synchronous motor is a complex multivariable, strong coupling and nonlinear system. There is a cross coupling relationship between its radial suspension force and electromagnetic torque and between the two radial suspension force components under motor load conditions, which will lead to rotor suspension failure in serious cases. Therefore, the decoupling control of bearingless permanent magnet synchronous motor is the key link to realize its stable suspension and speed regulation operation

so far, there are decoupling methods for the suspension force of bearingless permanent magnet synchronous motor. One is the analytical inverse system method which completely depends on the accurate model of the controlled motor. This method can only achieve approximate decoupling and has poor robustness to motor parameter changes and load disturbances. The other is the neural network inverse system method, which integrates complex neural network algorithm on the basis of the inverse system, but the engineering implementation is more difficult, Slow response: in addition, there is a decoupling method based on the orientation of the air gap magnetic field of the torque winding, but the error between the detected value and the actual value of the amplitude and phase of the air gap magnetic chain of the torque winding is large, and the decoupling effect is poor. In this paper, a new suspension force decoupling strategy is proposed for sinusoidal surface bearingless permanent magnet synchronous motor by using the feedforward decoupling method, and the effectiveness of the control scheme is verified by simulation