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To solve the problems of rotor flux field orientation loss and operation performance degradation caused by neglecting iron loss in the conventional vector control system, a new vector control strategy based on iron loss model of induction motor (IM) is proposed in this paper. In this strategy, a slip-type indirect field oriented vector control (IFOC) is designed by setting the magnetizing currents...
In this paper, an explicit model predictive control (EMPC) method is introduced for the design of attitude controller of an unmanned quadrotor helicopter. The explicit predictive control algorithm divides a long-term control problem into several short-term optimal control problems and still pursues the optimal solution to a certain extent. The traditional predictive control needs to be optimal online,...
This paper analyzes the characteristics and functions of exoskeleton-based rehabilitation systems, detailing the reasons why a person tends to use prostheses and the risks to which a person is exposed when suffering an amputation in their body. We show the development of an exoskeleton prototype with adjustable measures for children from 2 to 4 years of age, using embedded electronic systems for the...
This paper presents novel of power system stabilizer in which intend to investigate and observe the oscillation due to disturbances then define power angle difference on South Sulawesi grid. The symmetrical three phase fault and single phase fault to ground have been implemented and results show that the 150 kV of South Sulawesi grid tend to reach the limit of transient stability and then subject...
This paper deals with Wind Energy Conversion System (WECS) control equipped by Doubly-Fed Induction Generator (DFIG). Based on variable speed wind turbine and aerodynamic torque estimation, high order sliding mode controller is developed to improve the dynamic performances of WECS by producing the required electromagnetic torque generator. The desired DFIG torque is directly tracked using the proposed...
A novel Finite Element Controller Map (FECM) method for the speed control of a saturated induction motor (IM) drive is presented in this paper. The newly developed algorithm is based on approximate functions in finite elements, which are expressed according to the nodal values of output response of the IM drive. The map complexity depends on the nodes assigned within a discrete element. The proposed...
Predictive torque control (PTC) gains a lot of interest lately. Although the flux-weighting factor is the only tuning parameter in PTC, its selection is not a trivial task. This paper proposes an improved multi-objective fuzzy decision based method to select the best compromise voltage vector. The salient feature of the proposed approach lies in its capability to avoid high torque ripple and the need...
This paper presents the design and implementation of a robust drive train torque control for rotor inertia emulation in a dynamometer test bench application. The controller is part of a hardware-in-the-loop (HiL) framework for a 50 kW small test rig that enables a real-time interaction between test rig drive train and a rotor model. The control objective is to compensate undesired dynamics of the...
Design of switched reluctance motor (SRM) with emphases on torque ripple suppression and current reduction is researched in this paper. The motor is operated with direct torque control (DTC) to obtain a good torque control performance. Since motor design and motor control are two important aspects of the motor drive system, to achieve a better performance of the whole system, they should not be treated...
This paper presents an indirect rotor-field oriented control (IRFOC) algorithm for symmetrical six-phase double-winding induction machines with four three-phase sub-winding sets. The presented algorithm introduces the ability to control the power flow between different sub-winding sets. Multiple three-phase induction machines are utilised for critical applications such as more-electric aircrafts,...
For a particular five-phase synchronous machine, this paper investigates the sensitivity of a vectorial control strategy on the required peak phase voltage whose value is fundamental for the choice of the DC bus voltage. The specificity of the machine is that the first and third harmonic components of the back electromotive force (back-emf) have the same amplitude. As a consequence, the torque can...
Since the population of elderly gradually increases recently in developed country, and it causes an increase of burdens to care workers, there exists a strong demand for walking assist devices. The falling down of elderly may cause serious injuries which results in significant decrease of quality of life. Conventional wearable walking support devices are not easy for elderly to wear. The authors have...
Induction machines with double-star stator winding configuration, has extend the redundancy capability of the FEP based ship propulsion systems. However, under winding faulty conditions, the presence of negative sequence torque components introduce torque pulsations which are responsible for the torsional vibration stress. The classical Field Oriented Control (FOC) scheme approach, has a PI controller...
This paper proposes a novel hybrid position estimation strategy based on merging two self-sensing techniques according to the operating speed. High-frequency (HF) signal injection algorithm is deployed for zero and low-speeds, while the Machine Learning (ML) method is adopted for medium and high speeds. The proposed position estimator is intended for the fault-tolerant control of an interior permanent-magnet-synchronous...
This paper talks about the creation of fast and lightweight 2D electric road vehicle models in order to design the whole electric powertrain. Two models are developed. The first one is very essential: it consists of three dynamics, that is full vehicle dynamics, front wheels dynamics and rear wheels dynamics; basic friction model is used. The second model is more complex: it also takes into account...
Indirect rotor field oriented control (IRFOC) plays an important role in the high performance induction machine drives. In the indirect rotor field oriented control — based induction machine adjustable speed control system, the rotor field angle is usually obtained by the rotor angular velocity and the slip angular velocity. The rotor angular velocity can be sensed by an encoder with sufficient accuracy...
Sensorless control is a promising alternative for controlling Electric Vehicle (EV) and Hybrid Electric Vehicle (HEV) propulsion systems without the need of complex devices, such as resolvers or encoders. As the usage of a physical sensor is avoided, this allows significant cost reductions of the drive, and the reliability of the system is also improved. EVs require an operation range from standstill...
Nowadays, decreasing birthrate and aging population become to be the serious social problem in Japan. Therefore, needs of assistive devices are more and more increasing. When people use such assistive devices, there is a risk that devices cost user excessive burden. So analysis and evaluation of motions and load of person who uses assistive devices are necessary. In this paper, a model to analyze...
The paper firstly establishes a passivity-based control (PBC) of a double-fed inductor generator (DFIG). A new control method of the DFIG is proposed with the outer speed loop controlled by a full-order terminal sliding mode (TSM) controller to undertake maximum wind power point tracking (MPPT), while the inner current control loop is a PBC designed to manage the three-phase PWM rectifier. Simulation...
In order to realize the differential function of electric vehicle driven by two rear wheel-hub motors, by following the optimal slip ratio of each wheel and equalizing the slip ratio of both drive wheels as target, a electronic differential control strategy based on terminal sliding mode is proposed. First of all, according to the standard μ-λ curve, the optimal slip ratio of the pavement is determined...
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