A new speed control method of induction motor

In the case of unbalanced load performance, the key issue in speed control of a single inverter-powered parallel motor coupling system is how to overcome the difference in motor parameters and the effect of slip between the induction motors to maintain the same speed. Based on the synergetic control theory and synergy manifold design techniques, the model which is field-oriented vector control with reduced order induction is proposed, as well as a synergetic control strategy. Moreover, the accuracy of the rotor flux observation is one of the most important steps in the motor control. In order to improve the convergence speed of rotor flux error, a new flux observer based on the sliding mode theory is proposed. Introducing the Sig function instead of the symbol function, the sliding mode control technology is improved to observe rotor to eliminate the control chattering. Then, two motor speed coupling weighted synergetic control models are given by using the new weight vector of the parallel induction motor. These models can directly obtain the stator excitation current and torque current of the two motors. The simulation and experimental results show that the newly proposed motor synergetic control method has better steady operation performance, overcomes the shortcomings of the existing average vector control method in load imbalance and motor parameter difference and proves the validity and advancement of the design strategy.

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“…The design process of synergetic control algorithm for an n -order nonlinear dynamic system is presented as follows. 21…”

Section: Synergetic Theorymentioning

confidence: 99%

The weighted synergetic speed control for single inverter, parallel-connected induction motor drive

Wang

Liu

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…Induction motors are the major electrical machin used in manufacturing and further applications [1]. They are popular in comparison to other motors, such as DC motors, because of their low cost, reliability, and flexibility [2,3]. Induction motors utilize more than twothirds of all industrial electrical energy [4].…”

Section: Introductionmentioning

confidence: 99%

Performance Enhancement of Induction Motor Based on Three-Level T-Type Inverter Using DTC-SVM

Abbas

Hassan

2022

ITM Web Conf.

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Induction motors (IM) that are driven using the conventional direct torque control algorithm (DTC) suffer from vital drawbacks which are high ripples in the torque and flux. These ripples result due to the use of a look-up table and hysteresis comparators which causes variable switching frequency. Moreover, the use of a traditional two-level inverter leads to the production of low-quality voltage and current. The work presented in this paper proposed a modified control system to overcome these drawbacks. The proposed control system is based on the use of the space vector modulation-based DTC algorithm (DTC-SVM) for driving three-phase IM via a three-level T-Type inverter. The conventional DTC-SVM algorithm has been modified to match the work of the proposed inverter. The modification process was based on the mapping of the standard DTC-SVM algorithm in the space vector of the three-level inverter. The conventional and the modified control systems are implemented using MATLAB/Simulink package. The comparison of the standard and the modified DTC-SVM has been performed by simulation. Simulation results showed the superiority of the proposed algorithm in terms of reducing ripple in torque and flux and improving the quality of current and voltage supplied to the motor.

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“…Synergetic control has been previously used in motor drive applications [14,15,[21][22][23][24]. It has been implemented as a nonlinear speed control of multiple induction motor (IM) and PMSM drives.…”

Section: Introductionmentioning

confidence: 99%

“…However, they propose excessive numbers of manifolds for a two control input system. In [24], the authors use both synergetic control and vector control to control an IM drive. The proposed controller uses the synergetic control theory to control the speed and generate reference d-q currents.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis and Optimized Design of Synergetic Control for a PMSM Drive System

Adib¹,

Dhaouadi²

2022

Induction Motors - Recent Advances, New Perspectives and Applications

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This chapter presents an optimum design of synergetic control for a permanent magnet synchronous motor (PMSM) drive system. New macro-variables are proposed to improve the performance of the standard controller. The controller’s performance is compared with that of the field-oriented control scheme. The chapter also investigates the regenerative braking mode of operation in PMSM. Regenerative braking is achieved by operating the motor in torque control mode. The different algorithms are validated through experiments using a 1-hp PMSM drive system. We also provide an extensive study of the controller parameters tuning for optimal performance. The experimental results show that the proposed macro-variables improve the performance of the synergetic controller significantly. The synergetic controller is able to overcome nonlinearities in the system, such as static friction, faster than the field-oriented controller. The system also experiences fewer harmonics under the synergetic controller. The synergetic controller shows also better performance under wide signal variations. As for regenerative braking, the torque control mode of operation is shown to be suitable for harvesting energy and both techniques showed similar performance levels. The proposed synergetic control strategy will be very useful in electric vehicle (EV) applications, as it allows to improve the dynamic response and efficiency of the drive system required by the EV dynamics.

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A new speed control method of induction motor

Cited by 8 publications

References 8 publications

The weighted synergetic speed control for single inverter, parallel-connected induction motor drive

The weighted synergetic speed control for single inverter, parallel-connected induction motor drive

Performance Enhancement of Induction Motor Based on Three-Level T-Type Inverter Using DTC-SVM

Dynamic Analysis and Optimized Design of Synergetic Control for a PMSM Drive System

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