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The control strategy for current regulator based on synchronous frame has been widely applied for the three-phase pulse width modulation (PWM) rectifier. However, because of the lack of one demention in mathematical model, delaying one-quarter of a periodic synchronization of the actual circuit physical quantities to achieve a group of virtual physical quantities orthographic with the actual ones...
In this paper, a basic design scheme of electric engineering maintenance rolling stock (EEMRS) is briefly described, which is composed of six power converters. In order to reduce the size of heatsink and increase the energy conservation and efficiency of power converters, the thermal resistance model of IGBT module and heatsink, and its thermal equivalent circuit are presented. A calculation method...
This paper introduces a third-order dynamic model for lead acid battery whose parameters vary with the state of charge (Soc), charge current and the electrolyte temperature(θ). According to the practical dynamic model, this paper also proposes two control structure for charging battery applying to constant current and constant voltage mode: i) a innovative third closed loops control strategy composed...
This paper discusses the detailed operations of a three-phase dual active bridge bidirectional zero-voltage switching (ZVS) DC/DC converter (TPDAB) which transfers a bidirectional power flow between a 12V net and a high voltage DC net. The converter is controlled by phase-shift-modulation (PSM) with a fixed duty cycle D=1/3. It features isolation, smoother drawing and injecting current from the 12V...
Analysis and contrast between air-gap flux orientation and rotor flux orientation of bearingless induction motor are be given firstly, at the same time, the flux orientation control strategy and induction compensatation method of magnetic suspension system are analyzed. Then, according to the operation characteristics of bearingless induction motor, the combined control strategy is selected, i.e.,...
To realized the numerical control of three-phase bearingless induction motor, the unitary configuration of numerical control experimental system of three-phase bearingless induction motor has been designed firstly, then based on TMS320LF2407A numerical control CMOS chip of motor, the hardware control system configuration has been designed, and aiming at DSP operation and controller, high-speed photoelectricity...
The purpose of the article is to introduce a new DC-DC converter typology, which has the advantages of simple circuit typology with no total device rating penalty, soft-switching implementation without additional devices, simple control and low cost. It is promising for medium and high power applications where high power density, low cost and high reliability power converters are required, such as...
This paper presents a method for sensorless speed control of a non-salient permanent magnetic synchronous motor (PMSM). Special attention is put on the neural-based strategies and applied to the sensorless PMSM. An embedded hybrid Hinfin adaptive controller is implemented for trajectory tracking control of a PMSM servo drive system. The proposed control structure employs neural observer (DRNN) and...
In this paper introduced a design of the active controllable energy feedback device (ACEFD) based on dsPIC30F DSP and d-q controller. Through establishing the synchronous rotating coordinate system (dq) model, we may achieve the decoupling feed-forward control method; the advantages are discussed in the following paragraphs. We also analysis the inner current control model and calculate accurately...
Nowadays, the research on low speed and high torque permanent magnetic synchronous machine more and more attention in the fields of motors, and has great science significance and application value. Direct torque control (DTC) has become an a accepted advanced control method beside the current vector control Although DTC was initially applied in asynchronous machines, but it has been introduced successfully...
The mathematical model of permanent magnet synchronous motor (PMSM) and the digital control method of current loop have been studied, including P regulator, P regulator plus feed forward control and PI regulator. And PI has the best performance. Under ultra low speed, the coupling of d axis current and q axis current do not exist, so the speed control system become a single input and single output...
This paper describes a method of determination of permanent magnet synchronous machines (PMSM) parameters using simple load test combination with a linear regression model, which can avoid the disadvantages of the traditional load test. In the test, only supply phase voltage, phase current and the rotor position would be required, then the linear regression model was improved to simplify algorithm...
This paper has first elaborated the background, purposes and importance of the selected subject as well as briefly introduced the types of submarine drive motor load. Drive motor load characteristic simulation principle is the foundation of designing simulation controller. Sets up PMSM-DC generator unit, Based on it, the armature current of dynamic load simulation system has been designed. Meanwhile,...
The low speed and high torque permanent magnetic synchronous motor (PMSM) is increasingly playing an important role in electric propulsion system due to its many advantages over competing technologies. The direct torque control (DTC) technique for PMSM is receiving increasing attention due to the important advantages the low dependence on motor parameters when compared with other motor control techniques...
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