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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...
Voltage phase control is a novel field-weakening scheme for PMSM which was reported as more stable in high speed region. This paper provides a current ripple reduce method and a frequency-compensation method. The current ripple reduce method deals with the problem that the voltage phase control has bigger current ripple compared to the tradition method. The frequency-compensation method decreases...
This paper proposes a new intelligent control for an indirect vector controlled induction motor drive for high performance, based on a finite element controller map. The traditional basic conventional algorithm (PI controller) has been successfully used to obtain decoupling control between the rotor flux and the torque. The basic PI has fixed gains that cannot be increased beyond certain limits. In...
The multiplex 3-phase winding motors suffer from the problem of the magnetic coupling between the normal winding and the fault winding. To investigate the behaviors of the dual-winding PMSMs on the short-circuited fault conditions, a fault analysis model is developed that includes a dual-winding PMSM circuit model with a short-circuited fault coil within some phase coil and an inverter model with...
This article analyzed the limitation of stepping motor in current application. The model of hybrid two-phase stepping motor is established. A control system based on fuzzy adaptive control method is designed, and the effectiveness of this method is proved by practical test. The results show that the overshoot of the fuzzy adaptive control is about 5.2% and the adjustment time is about 100 ms.
High performance drives with induction machines require use of vector control. The direct torque control and field oriented control are nowadays two most applied vector control methods. The main advantage of the method for direct torque control of induction machines is its simplicity and therefore its robustness. Namely, control variables (the electromagnetic torque and stator flux vector) are estimated...
This paper presents a wind-driven DC power generation and control system modified by a doubly fed induction generator (DFIG), which stator is connected with a full-power diode rectifier to supply DC power to a stand-alone load and rotor is connected to the DC link with a PWM converter in charge of regulation of frequency and voltage on stator side. The transient character and behavior of current,...
This paper proposes a high response voltage phase torque control method of interior permanent magnet synchronous motors for both linear and over-modulation range including six-step mode. In our proposed method, a new n-t coordinate system is utilized, on which voltage phase and amplitude are controlled responsively and stably.
This paper introduces an innovative sensorless model predictive current control (MPCC) technique for an induction motor (IM) drive. The proposed technique handles the state of the inverter as a discrete control variable in contrast to the classic vector control in which the discrete model of the inverter is not considered. An effective formulation of cost function is used, in which there is no need...
The presented DTC-3V-3L method was designed to ensure the high performance of PMSM drive. Using the predictive approach the algorithm minimizes torque ripples, ensures constant switching frequency and DC link voltage balancing. Moreover, it also provides the fastest dynamic torque response, similar to the fastest non-linear methods.
A novel extended state observer (ESO)-based vector control (VC) strategy is developed for permanent magnet synchronous motor (PMSM) drive systems with only one phase current sensor. Generally, to achieve high precision control, two phase current sensors are indispensable for successful operation of the feedback control. In response to a phase current sensor fault, by use of technique of ESO, a new...
Flux-switching permanent magnet machines (FSPM) show high-reliability and are quite suitable for the fields such as new energy, electric vehicle and aerospace. In this paper, the id=0 vector control strategy based on SVPWM was proposed. Besides, the high frequency signal injection method was used to identify the initial rotor position of FSPM. The experimental results proved the feasibility of the...
This paper presents a control strategy for squirrel cage induction generator (SCIG) based on commercial vehicle using engine-generator system. For this, the conventional slip- and vector control method using PSIM is used to illustrate the characteristics of the system. The simulation results show that the deviation of DC link voltage from its reference value during the mentioned transient conditions...
This paper presents a new slip compensation method for the traditional scalar control (V/f) of induction motors. Based on the level of q-axis component of stator current, the steady-state slip of motor speed is estimated by means of flux-oriented current tracking that is usually applied in vector control. The method features both the simplicity of scalar control and improvement on the performance...
The follow-up control system has the feature of input signal random changing. On the basis of motor driving technology, the system can follow the change of the input signal. Permanent Magnet Synchronous Motor (PMSM) has small output torque ripple feature. Thus it has broad application prospect in the follow-up control system. The vector control of PMSM has coupling feature, reducing the speed dynamic...
This paper deals with sensorless vector control of induction motor (IM) based on model reference adaptive system (MRAS) theory and sliding mode technique. An adaptive-gain supertwisting (ASTW) sliding mode speed controller is designed to provide good speed tracking performance in the presence of load torque variation. A stator current and rotor flux sliding mode observer (SMO) is designed, which is...
Since the introduction of Electrical Multiple Units (EMUs) to China, traction control technology has become one of the study hotspots. The traction control system of EMUs consists of a traction converter system and a Traction Control Unit (TCU). The traction converter system is composed of a transformer, a four-quadrant pulse rectifier, intermediate DC link, rheostatic chopper, a three phase half...
In this paper, a new approach for achieving speed control of induction motor and three phase inverter output balanced currents under unbalanced grid voltage condition are presented. The proposed method is based on vector control of induction motor by using field oriented control. In unbalanced grid voltage condition, negative sequence components appear on the grid voltage vector, leading to distorted...
This paper presents a simple method for calculating the efficiency map of a Permanent Magnet Synchronous Machine (PMSM) for traction applications. The calculation uses motor nameplate data only. This is useful in e.g. design phase of an electric vehicle where the efficiency map is required to estimate the range based on a given driving cycle. The method is experimentally validated with a 100kW, 191...
Multilevel inverters are an alternative for a wide range of low voltage electrical drives. They reduce power semiconductor losses, voltage transients at the motor windings, harmonic losses in the cables and common mode disturbance currents. In the low voltage range (<1000 V) new wide-bandgap semiconductors (SiC, GaN) have the potential to reduce the conduction and switching losses in multilevel...
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