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In order to combine the model-based control algorithm with the physical model, this paper proposed a co-simulation system of permanent magnetic spherical motor (PMSM). Firstly, a new track planning was simulated in ADAMS for the convenience of trajectory tracking. Secondly, a new co-simulation interface was presented, thus the model-based control algorithm can be used to control the physical model...
Temperature of windings increases because of the heat generated during motor running process, therefore motor parameters will be changed. The effects of temperature on external characteristics of the motor were analyzed as the rising temperature causes demagnetization of the permanent magnet. A new control strategy is designed to reduce the influence of the temperature. The simulation results show...
Line-start permanent magnet synchronous motor has many advantages, but it has two important defects are poor starting torque and synchronization capability. This paper presents a pole-changing of line-start permanent magnet synchronous motor which has a 6/8 pole-changing stator winding. A new structure of stator winding is designed to realize pole-changing. This motor can eliminate braking torque...
With low accuracy, large fluctuations and other issues of permanent magnet synchronous motor (PMSM) parameter identification is discussed in this paper, a new method is proposed to improve the accuracy of identification results by improving the model and algorithm. Using Pade approximation method can get the Pade linear model of PMSM. The resistance and inductance of the permanent magnet synchronous...
This paper proposes a method that based on direct thrust control (DTC) to address the disturbance rejection problem in permanent magnet linear synchronous motor (PMLSM). In view of the PMLSM, direct torque control design is suitable for the DTC of linear motor control system. According to the rated load capacity of the motor, we give PMLSM a load disturbance. Then we obtain the motor dynamic characteristics...
It is necessary to estimate the information of the accurate position and speed for the sensorless control of permanent magnet synchronous linear motor (PMSLM) drive system. This paper presents a novel digital sensorless control algorithm for PMSLM drives based on extended Kalman filter (EKF). The model of the PMSLM control system based on EKF in Simulink simulation environment is developed. The PI...
For dual linear motor cooperative control system, there is only one controlled input signal can be used. Each linear motor of the control system is independent. Therefore, the position loop of control system is easier to be disturbed. This paper presents a 2DOF PID controller to position loop for dual linear motor cooperative control system so that the two groups of parameters can be adjusted independently...
Reduction of the spatial harmonics of back electromotive force(EMF) is a useful way to reduce thrust ripple of permanent magnet linear synchronous motor (PMLSM). In this study, a method of v-skewing in the coils is proposed to reduce the harmonics to suppress thrust ripple in the PMLSM. The thrust and the harmonic are generated in a double-sided PMLSM model. The 3-D finite element method (FEM) is...
Cogging torque in permanent-magnet motors is one of the most important problems to be considered in high performance applications especially in low speed and direct drive applications. In this paper, the analytical expression for cogging torque in permanent-magnet synchronous motors (PMSM) with auxiliary teeth is derived by the energy method and the Fourier series analysis, based on the air gap permeance...
Cogging force is one of the main factors causing the thrust fluctuation of permanent magnet synchronous linear motor, in order to effectively suppress the influence of cogging force on the thrust fluctuations, cogging force is analytical analyzed based on energy method and Fourier decomposition method, this paper proposes unequal pole-pitch method of stator and mover to inhibit the cogging force of...
In the speed control system of electrically excited synchronous motor (EESM), flux observer plays an important role, which can detect rotating angle and the amplitude of flux. Essentially, the state observer is the state reconstruction of motor, it can be get according to the state equation of EESM and modern control theory. Due to the mathematical model of EESM is very complex, the state equation...
In this paper, an open-circuit fault tolerant strategy for a five-phase permanent magnet synchronous machine (PMSM) is proposed based on the theory of keeping the magneto-motive force constant under both healthy and faulty conditions. According to the principle, the corresponding modified current vectors of healthy windings under three different open-circuit faults are derived, respectively. Then,...
It is significant to research the fluid flow characteristics which inside and outside the driving induction motor according to the complex structure and cooling air flowing. In this paper a asynchronous driving motor was taken as an example, and a three dimensional fluid-heat coupled model with motor encapsulated in air region was established according to cooling structure, based on the computational...
Fuel cell is a promising electric vehicle power supply, but has disadvantages of poor dynamic performance and short service life. To solve the disadvantage, a method of hybrid power supply of fuel cell and super capacitor is adopted in the dynamic process, the super capacitor helps fuel cell enter the steady state. In this paper, the topology of the whole system is introduced, which use two DC/DC...
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