An Improved IDIM Technique for Sensorless Control of Single-Phase Electromagnetic Drives

2019 ◽  
Author(s):  
Niklas Koenig ◽  
Giorgia Anzelmi ◽  
David Naso ◽  
Matthias Nienhaus ◽  
Emanuele Grasso
Keyword(s):  
Single Phase ◽  
Sensorless Control

scholarly journals Online Efficiency Optimization and Speed Sensorless Control of Single-Phase Induction Motors

2021 ◽  
Vol 11 (19) ◽  
pp. 8863
Author(s):  
Mohammad S. Golsorkhi ◽  
Hadi Binandeh ◽  
Mehdi Savaghebi
Keyword(s):  
Single Phase ◽  
Induction Motors ◽  
Control Method ◽  
Sensorless Control ◽  
Lookup Table ◽  
Operating Point ◽  
Operating Voltage ◽  
Optimal Operating ◽  
Light Load ◽  
Gradient Descent Algorithm

Single phase induction motors (SPIM) are widely used in residential and commercial applications. Enhancement of efficiency of SPIMs can lead to huge energy savings. This paper presents a novel mechanical sensorless control method for SPIM drives. In this method, a machine learning algorithm is used to estimate the slip based on the ratio of main and auxiliary winding currents. To enhance the efficiency, the terminal voltage is reduced under light load conditions. The optimal operating voltage is implicitly obtained by equating the ratio of main and auxiliary winding currents to its optimum value. This optimal operating point is first calculated based on the frequency from a lookup table and then updated by using gradient descent algorithm. This way, the optimal operating point is realized despite motor parameter variations. The proposed scheme is suitable for low-power applications where working at different speeds and load torques is demanded, such as ventilation systems and various household appliances. Simulation results are presented to verify the efficacy of the proposed method.

scholarly journals Sensorless Control of a Fault Tolerant PMSM Drives in Case of Single-Phase Open Circuit Fault

2016 ◽  
Vol 7 (4) ◽  
pp. 1061
Author(s):  
Kamel Saleh ◽  
Mark Sumner
Keyword(s):  
Control Strategy ◽  
System Performance ◽  
Single Phase ◽  
Fault Tolerant ◽  
Sensorless Control ◽  
Fault Tolerant Control ◽  
Performance Degradation ◽  
Open Circuit ◽  
Phase Inverter ◽  
Simulation Results

This paper introduces a sensorless-speed-controlled PMSM motor fed by a four-leg inverter in case of a single phase open circuit fault regardless in which phase is the fault. To minimize the system performance degradation due to a single phase open circuit fault, a fault tolerant control strategy that includes taking appropriate actions to control the two remaining healthy currents is used in addition to use the fourth leg of the inverter.  Tracking the saliency is done through measuring the dynamic current responses of the healthy phases of the PMSM motor due the IGBT switching actions using the fundamental PWM method without introducing any modification to the operation of the fourth leg of the inverter. Simulation results are provided to verify the effectiveness of the proposed strategy for sensorless controlling of a PMSM motor driven by a fault-tolerant four-phase inverter over a wide speed ranges under the case of a single phase open circuit.

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