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The Unit Power Factor (UPF) operation of interior Permanent Magnet Synchronous Generator (IPMSG)-rectifier system is discussed in detail. The scheme is focus on the control of the classical architecture of IPMSG-Voltage source rectifier(VSR) which is widely used in All-Electric Ship. And the unit power factor control is applied to the generator-side converter by a reasonable allocation of d- and q-axis...
Taking Master-slave rectifier parallel operation control system as the object of study, the paper adopts a control strategy of average-current, the current instructions of the Master rectifier is delivered promptly to the Slave rectifier pass by CAN Bus. Firstly, the measurement methods of the time that data transmits by CAN bus in parallel system is given, which provides a context for the system...
The harmonic issue of generator-rectifier system is discussed in this paper. A general method for determining the theoretical harmonic components of the regular sampled symmetrical SVPWM is presented. The analytical expression for SVPWM was validated by comparing the analytical calculated results with experimental measurements. The relationships among Total Harmonic Distortion, modulation index, Carrier/fundamental...
This paper provides an analytical nonlinear model based on flux density of rotor and Winding function of the PMSM, which take into account the magnetic saturation. This model gives a clear physical picture for the saturation phenomenon in the d- and q-axis representation. Moreover, the saturation effect on the machine d- and q-axis synchronous reactance is investigated and the contributions of both...
Electric Motors for Unmanned Underwater Vehicles (UUV) Propulsion must have high efficiency for maximum utilization of the energy from batteries. This paper aims to address how to achieve the optimal system efficiency of multi-motor drive system. Based on the estimation of the real-time load condition and the efficiency optimization strategy, digital signal processor(DSP) coordinates the work between...
Permanent-magnet synchronous motor (PMSM) drives are widely used for high-performance industrial applications where torque smoothness is an essential requirement. However, the parasitic torque pulsations deteriorates the drive performance particularly at low-speeds. To suppress these speed ripples, a parameter self-learning hybrid fuzzy controller was implemented with the objective of minimizing speed...
This paper present a novel control strategy of PWM rectifier with three phase permanent magnet synchronous generator(PMSG) input. The principle of PWM rectifier with variable frequency input and constant output DC voltage is proposed. Special interest is dedicated to the effect of model and boundary of PMSG. Variable speed generator control system in shipboard power system represents one of the main...
Torque ripple minimization for permanent magnet synchronous motor (PMSM) based on PI-type iterative learning control (PIILC) strategy is discussed in this paper. Iterative learning control is naturally a good choice for minimize periodic torque ripple due to its data storage characteristic. To assure parameter convergence, infinite norm is used in controller design for learning gains. The approach...
In this paper, a novel torque ripple minimization method, namely, sliding mode variable structure is proposed for switched reluctance motor (SRM). The total reference torque is calculated by the speed error via the sliding mode variable structure controller, and the expected phase torque will be got through the Torque Sharing Function. Then make margin calculations between the expected phase torque...
An adaptive sliding mode speed and position observer for sensorless control of brushless DC motor (BLDCM) is proposed in this paper. According the mathematical model of BLDCM, the sliding surface was defined based on the errors between actual and estimated currents. Equivalent control and model reference adaptive control (MRAC) is used to obtain position and speed signals of the rotor. The Lyapunov...
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