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In this paper, a dead-beat direct torque and flux control with a novel sliding-mode stator flux observer is proposed for electric vehicle (EV) drives. Compared to the direct torque control, the proposed scheme exhibits both static and dynamic performances. Since the system parameters have impact on the control effect of the permanent magnet synchronous motor (PMSM) deadbeat-direct torque control (DB-DTC)...
A novel permanent-magnet linear machine that consists of several isolated movers and one single stator is proposed in this paper. It is especially suitable for tasks requiring multiple drive machines. Each mover can produce independent thrust and flexible motions by interacting with the stator poles. Compared with conventional multimotor driven system, it helps to achieve more compact size, and thus...
Conventional linear machine consists of only one stator and one mover. In this paper, a permanent magnet (PM) tubular linear motor with multiple movers is proposed to improve the efficiency of stator field. The outer and inner movers can produce independent motions by interacting with the PM stator. It can be used in large systems requiring multiple driven elements and space saving. The employment...
Linear oscillating motor attracts much attention in short-stroke reciprocate motion applications, due to direct and efficient linear movement output. However, the requirement of high output power in linear motor always leads to rapid increase of outer diameter, which is not only bulky in structure but also decreases power density. In order to achieve efficient high power linear motor design, E-Type...
Permanent magnet (PM) array has great influence on flux field distribution of motor. A Halbach PM array is used in the motor of this paper, which not only increases the thrust output, but also decreases the mover mass. A new analytical model for magnetic flux density in circumferential direction is proposed in this paper based on equivalent surface current method, which could solve the flux density...
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