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This paper proposes a sensorless field-oriented control(FOC) strategy for Surface-mount Permanent Magnet Synchronous Motor(SPMSM). Firstly, a rotor flux estimation method with a high pass filter is introduced. Secondly, the basic principle of PLL and PI parameters tuning method derivation are demonstrated. And then, the compensation method for the phase shift caused by the high pass filter has been...
This paper proposed an integrated hall magnetic encoder error correction method. In order to eliminate the steady-state error caused by installation errors and so on, this paper proposed three-phase zero and sine symmetric reconstruction. The sum of three-phase hall signal could be constant zero through zero reconstruction. In sine symmetric reconstruction method, transform three-phase hall signal...
A novel dualband impedance transformer based on fractional-order inductor and capacitor is proposed in this paper. This transformer is designed to transfer the arbitrary frequency-dependent complex impedances sources to loads at two irrelevant frequencies with one fractional-order inductor and two fractional-order capacitors. Each fractional-order element has two parameters to be determined: the order...
This paper presents an optimal design of interior permanent magnet synchronous machine (IPMSM) for electric spindle considering the flux-barrier shape. Four types of flux-barrier are discussed and compared to improve torque performance, which includes the average torque, torque ripple and cogging torque. The design process is accomplished by using finite element method (FEM). Moreover, the Taguchi...
In recent years, with the rapid development of renewable energy, power energy storage has become a bottom neck of its development, and superconducting magnetic energy storage (SMES) seems to be a viable solution. A topology based on common DC voltage bus is proposed for high power voltage source converter (VSC)-SMES. The mathematical model of SMES is constructed and the detailed control strategy is...
This paper introduces the principle of the engine waste heat recovery system. The organic Rankine cycle (orc) system is proposed to improve the efficiency of waste heat recovery. GT-power software is used to make a DI engine model of 493ZLQ3. The model simulates the exhaust temperature on the brake power curve and brake torque curve based on the optimized results, and put a comparison with the test...
The complexity of modern systems requires a holistic approach to modeling and simulation during the design phases. This often includes an integrated model of the overall system (architecture, function, and environment) as well as a link-up of computer-aided design tools, because there are many occasions in which there are aspects of the system that cannot be described in one tool. The paper introduces...
This paper deduces a remarkably precise analytical formula for calculating the fundamental resonant frequency of V-shaped cantilevers using Rayleigh-Ritz method. This analytical formula, which is very convenient for MEMS sensor design, is then validated by ANSYS simulation. This formula raises a new perspective that, among all the V-shaped cantilevers, the simplest triangular cantilever can lead to...
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