Low-Cost Dual-Mechanical-Port Dual-Excitation Machine for Washing Machine Application

Baloch, Noman; Kwon, Jung-Woo; Ayub, Muhammad

doi:10.1109/access.2019.2926302

Cited by 10 publications

(3 citation statements)

References 33 publications

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“…In the case of driving in the washing mode, since laundry and water are together, it moves at a low speed, but a high torque is required. On the other hand, in the hydration mode, water is removed, and a high torque is not required, but for quick dehydration, it must be operated at a high speed [14][15][16][17][18]. The target specification of the washing machine requires a torque of 1.35 Nm at low speed 580 RPM and 0.2 Nm at high speed 15,660 RPM.…”

Section: Operating Range Of Cnventional Spoke-type Pmsmmentioning

confidence: 99%

A Study on the Shape of the Rotor to Improve the Performance of the Spoke-Type Permanent Magnet Synchronous Motor

et al. 2021

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This paper describes a study on the improvement of the dehydration performance of the conventional washing machine model. Recently, as interest in improving the dehydration performance of washing machines has increased, the need for a study on a high-speed electric motor has emerged. However, this conventional spoke-type PMSM has difficulty in speeding up due to the following problems. First, field weakening control is indispensable for high-speed operation of an electric motor. This control method is a big problem in causing torque drop and irreversible demagnetization of the motor. Moreover, the centrifugal force increases during high-speed operation, which adversely affects the stiffness of the motor. Therefore, in this paper, a new rotor shape of spoke-type PMSM was proposed to solve the above problem.

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Section: Operating Range Of Cnventional Spoke-type Pmsmmentioning

confidence: 99%

A Study on the Shape of the Rotor to Improve the Performance of the Spoke-Type Permanent Magnet Synchronous Motor

et al. 2021

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“…Over the past decade, however, the concept of dual mechanical ports machines (DMPM) was introduced by the researchers [1], [2]. Due to its smaller size and costeffectiveness, the DMPM has found applications in various fields, such as pure electric vehicle [3]- [5], hybrid electric vehicle [6]- [9], wind energy systems [10]- [12], and others [13].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Input Multi-Output Model Predictive Direct Torque Control for Dual Mechanical Port Machine

Bizhani,

Ben-Brahim,

Gastli

et al. 2023

IEEE Access

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In this paper, a multi-input multi-output (MIMO) model predictive direct torque control (MPDTC) strategy for a dual mechanical port machine (DMPM) is proposed. A MIMO state space model is developed, incorporating the electromagnetic interaction between the stator, inner rotor, and outer rotor of the DMPM. The prediction model is then derived to adjust the currents of stator and inner rotor windings, enabling independent control of the electromagnetic torques of the mechanical ports. Compared to single-input single-output based MPC and PI-based field-oriented control strategies, the proposed approach effectively mitigates the undesired electromagnetic interactions, guaranteeing smooth speed control of both mechanical ports. The simulation results carried out by MATLAB/Simulink verify the precise performance of the DMPM in different operating modes. The Hardware-in-the-Loop results further confirm that the proposed direct torque control not only regulates the inner and outer rotor independently, but can also be executed in real-time without posing any computational burden on the processor. A sensitivity analysis for evaluating the performance of the proposed strategy in the presence of variations in the electrical parameters of the DMPM is also provided.INDEX TERMS Dual mechanical port machine, model predictive control, direct torque control, multi-input multi-output system, hardware in the loop.

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“…Designing a machine solely for low-speed operation results in decreased efficiency at higher speeds due to high iron losses. Conversely, optimizing for high-speed operation leads to lower efficiency and torque at low speeds as the magnetic flux density decreases due to high copper losses [5,6].…”

Section: Introductionmentioning

confidence: 99%

Improving Efficiency of a Pole-Changing Vernier Machine Considering Residual Magnetic Flux Density

Lee,

Kwon,

Kwon

2023

Energies

Self Cite

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This paper presents the efficiency improvement of a pole-changing vernier machine (PCVM) by considering the residual magnetic flux density (Br) of low coercivity force (LCF) permanent magnets (PMs). The PCVM operates in two modes: vernier machine (VM) mode and permanent magnet synchronous machine (PMSM) mode, achieved through pole-changing. Pole-changing involves reversing the magnetic flux direction of LCF PM to alter the number of rotor pole pairs. By changing the number of rotor pole pairs, the PCVM operates as a VM mode at low speeds, providing high torque, and as a PMSM mode at high speeds, offering high efficiency. To achieve this, a combination of high coercivity force (HCF) PM and LCF PM is utilized in a single structure. The magnetic flux direction in the LCF PM is determined by Br, and the highest efficiency is achieved when Br reaches its maximum value |Brm|. This paper focuses on improving efficiency by obtaining Brm in VM mode and −Brm in PMSM mode through the design process. Additionally, finite element analysis (FEA) is employed to compare the performance of the improved model, which considers Br, with that of the conventional model, designed without considering Br. The improved model achieves higher Br values in each mode compared to the conventional model, resulting in increased torque density. Consequently, this leads to improved efficiency.

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Low-Cost Dual-Mechanical-Port Dual-Excitation Machine for Washing Machine Application

Cited by 10 publications

References 33 publications

A Study on the Shape of the Rotor to Improve the Performance of the Spoke-Type Permanent Magnet Synchronous Motor

A Study on the Shape of the Rotor to Improve the Performance of the Spoke-Type Permanent Magnet Synchronous Motor

A Multi-Input Multi-Output Model Predictive Direct Torque Control for Dual Mechanical Port Machine

Improving Efficiency of a Pole-Changing Vernier Machine Considering Residual Magnetic Flux Density

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