The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a new direct torque control (DTC) scheme based on space vector modulation (SVM) for interior permanent magnet synchronous machine (IPMSM) drives. The new scheme provides a variable option for the improvement of DTC controlled IPMSM. Closed-loop control of both torque and flux is developed with two proportional-integral (PI) controllers. The stator voltage is generator through SVM...
Aiming at a wide application range of controller, a design method of reconfigurable controller was presented for AC position servo systems (ACPSS) based on permanent magnet synchronous motor (PMSM). In this controller, each of control loops adopts several control strategies. Their characteristics and parameter's calculation methods were analyzed in detail in this paper. The closed-loop bandwidth's...
This paper presents and analyzes the asymmetrical voltage-cancellation (AVC) control, for a multi-output series resonant inverter. It is applied to the multiple-burner induction-heating cooking appliances. Some common approaches use several single-output inverters or a single-output inverter multiplexing the loads along the time periodically. By specifying a multi-output series-resonant high frequency...
a novel dual secondary winding and dual power bridge high frequency link (HLF) inverter is discussed in this paper Single-stage power conversion, standard half-bridge connection of devices, soft-switching for all the power devices (ZVS or ZCS), low conduction loss, simple bipolar combined phase-shifted control, and high efficiency are among the salient features of the HLF inverter. The principles...
This paper presents a new constant power control of high frequency electronic ballast for a metal halide lamp based on the phase-locked loop (PLL) technique. First, the PLL is employed as a feedback mechanism to improve the resonant frequency variations caused by lamps aging or an impedance difference between used lamps characteristics. The proposed system can adjust the operating frequency to sustain...
A fault detection and accommodation method based on fuzzy neural networks was presented for nonlinear systems. The fault parameters was designed to detect the fault, adaptive updating method was introduced to estimate and tracking fault, fuzzy neural networks was used to adjust the fault parameters and construct automated fault diagnosis, and the fault compensation control force, which given by fault...
This paper proposes a new stator section crossing method that can overcome the drawbacks of the tow-step and three-step methods used in Shanghai Maglev railway. This method has no descending of propelling force and idleness of PWM converters. The mathematic model and vector control strategy of the permanent magnetic long stator linear machine (PMLSM) are also researched in this paper. The effectiveness...
A data fusion method for single-phase inverter fault diagnosis based on D-S evidential theory and fuzzy logical theory is presented. By measuring the output voltage the two bridge-arms voltage and the temperature of MOSFET, the belief function assignment is obtained, and the fusion belief function assignment is obtained by using D-S rule and fuzzy logic, and fault component is found. By comparing...
A kind of fractional-order PIalpha controller is considered. Controller structure with two modes is presented, active status of two modes and mode switching are described. The Tustin operator is used for digital realization of the fractional-order PIalpha controller. Different approximation order is discussed to get a tradeoff between approximation precision and complexity of discretization expression...
A dual mechanical port (DMP) machine is a brand new type of electric machine, promising in many applications such as multi-source hybrid traction, integrated starter and generator, variable gearboxes and so forth. In this paper, the dynamic model is established and analyzed. Further, a prototype machine is designed and evaluated by finite element analysis. Several important operation modes are highlighted...
As the high frequency link (HFL) SPWM inverter possesses highly nonlinear property and variable parameters due to its special structure, the perfect control can not be obtained with conventional control methods especially under nonlinear load. A self-adaptive fuzzy control scheme in this paper is proposed for a single-phase high frequency isolated DC\AC\AC inverter, in which a novel assistant fuzzy...
This paper proposes a new control strategy for the transition between grid-tied mode and off-grid mode of the utility interconnected fuel cell inverters with an LCL filter. During the transition from grid-tied mode to stand-alone mode, the inverter control is switched to voltage-controlled mode from the beginning of the transition, using inverter instantaneous output voltage regulation to reduce the...
A novel sliding mode control based on Hinfin theory has been developed to meet the nonlinear control of regenerative braking of electric vehicle(EV). By combining the sliding phase and the hitting phase, the parameter of the sliding mode controller is designed by Hinfin optimization procedure. In the scheme the sliding mode is ensured from the beginning of the response without the reaching problem...
Performance and stability of internal model control can deeply deteriorate when plant control input is subject to saturation. Study is made on the reason why two-degree-of-freedom internal model control has anti-windup characteristics. From this consideration, a new modified three-degree-of-freedom internal model control scheme is proposed. This method can realize the decoupling of anti-windup, reference...
A new three dimensional space vector modulation (3D-SVM) strategy in abc coordinates for the three phase four wire converter with split-capacitor is presented. Among various three phase four wire converters, the center split converter is suit to low cost, low power applications for its fewer switches. Compare to the 3D-SVM in alphabetagammacoordinates, the strategy in abc coordinates is more clearly...
The study of a fuzzy logic controlled, three-phase shunt active power filter to improve power quality by compensating harmonics and reactive power is presented. The advantage of fuzzy controller with self-adjustable factor proposed in this paper is that it is based on a linguistic description and does not require a mathematical model of the system. Furthermore the fuzzy control rules can be modified...
ATM is element that reliability, stability is important in relation with customer by financial agency used device. To embody high reliability and stability, reliability estimation technology development is important. When new product is developed, performance and reliability evaluation of product are essential element. In this paper, is treating contents on reliability estimation of stepping motor,...
Series power quality controller (SPQC) can effectively suppress power quality interferences. Yet the normal operation of whole system based on the maintenance of DC-side voltage. This paper presents an unexpected voltage boost of DC side in SPQC and analyzes it in detail. The experimental results verified the analysis
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.