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An external rotor transverse flux motor has been proposed in our previous research, which has the advantages of low manufacturing cost and high torque density. In this paper, a novel transverse flux is introduced based on the foregoing motor's structure. At first, the detail motor structures and working principle are introduced. Then, the three-dimensional model of proposed motor is built by finite...
A novel out-rotor Transverse Flux motor is proposed in this paper, both permanent magnet and armature winding of the novel motor are fixed on the stator side, the rotor merely contains core. The motor is convenient for manufacturing and suitable for low-speed large torque direct-drive applications. Firstly, the basic structure and working principle of the motor are introduced in detail. Secondly,...
Transverse flux motors are of great interest in the low-speed high-torque direct-drive applications. In this paper, a novel transverse-flux flux-reversal motor structure is presented, which is more suitable than conventional transverse-flux motors when cost and torque density are both considered. The basic structure and operating principle are introduced. The three-dimensional (3-D) equivalent magnetic...
We present a novel bionic eye based on spherical ultrasonic motor (SUSM). SUSM is a compact mechanism occupying little space but good responsiveness, high positioning accuracy, high torque at low speed and strong magnetic field compatibility. With those advantages, the bionic eye easily implements some human eye movements. It is constructed from an eyeball, three driving stators, three preloaded apparatuses...
In view of problem for miniaturizing Micro Air Vehicles (MAV), a novel asymmetrical pitch system faced to rotary wing MAV is introduced. The pitch mechanism and control characteristics are studied and analyzed. Because the deformation of elasticity link is key to generate the blade pitch, it is analyzed and calculated by elasticity finite element method. And the results illustrate the linear relationship...
Two problems must be solved in the speed sensorless vector control of induction motor drive: the speed estimation and rotor flux observation. Because of the multiplication terms of state variables, the induction motor model is the non-linear state equations. To estimate the state variables of motor model and gain the rotor flux and speed signals, the paper proposes a method to estimate them using...
By reasonably predigesting the characteristics of the subminiature rotorcraft, a model for a subminiature rotorcraft is established and the linear time-invariant attitude dynamics with physical parameter of the subminiature rotorcraft at hover is obtained. A subspace-based state space system identification method and analysis of model uncertainty is applied to the model of rotorcraft. At last, the...
By reasonably predigesting the characteristics of the subminiature rotorcraft, a model for the nonlinear dynamics of a subminiature rotorcraft is established. Through the linearization of the nonlinear dynamics, the linear time-invariant attitude dynamics with physical parameter of the subminiature rotorcraft at hover is obtained. A subspace-based state space system identification method is applied...
Concerning to problems of the traditional machine pitch system for miniaturizing Micro Air Vehicles (MAVs), A novel asymmetrical pitch method is put forward in this paper. This novel method makes use of the deformation of an elasticity link to generate the blade pitch meeting the requirement of the MAV flight mode control. This new pitch mechanism has been verified by means of two experiments. One...
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