Comparison of copper loss minimization and field current minimization for Electrically Excited Synchronous Motor in mild hybrid drives

Tang, Junfei; Liu, Yujing

doi:10.23919/epe17ecceeurope.2017.8099352

Cited by 17 publications

(9 citation statements)

References 13 publications

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“…This may be due to the fact that such machines are most often built as medium and high power motors. So far, little work has been published on the minimization of power losses in these motors [8]- [11]. The lack of interest may also result from the fact that in the case of control enabling energy-saving operation, it is necessary to give up the valuable property of the motor, which is the ability to generate inductive reactive power by an overexcited machine.…”

Section: Introductionmentioning

confidence: 99%

A Measurement Method of Determining the Power Supply Parameters for the Optimal Operation of a Synchronous Motor

Banach

2022

Measurement Science Review

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The article presents a measurement method for determining the power supply parameters for the optimal operation of a synchronous motor, i.e. operation with minimal losses in the entire load range. The measurement strategy is based on the search for the minimum sum of the power supplied to the excitation circuit and the stator circuit for the assumed load torque values. The process of searching for the minimum sum of power can be significantly shortened and simplified by using a network parameter meter. The research confirmed the usefulness of the proposed method for determining the optimal operation parameters of a synchronous motor. The tested motor was a machine with a cylindrical rotor, but the developed method will also be applicable to synchronous machines with salient pole rotors.

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Section: Introductionmentioning

confidence: 99%

A Measurement Method of Determining the Power Supply Parameters for the Optimal Operation of a Synchronous Motor

Banach

2022

Measurement Science Review

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“…Therefore, the excitation can be controlled by adjusting the field current [4] [5]. Consequently, it becomes possible to achieve a high starting torque and a wide field weakening range [6]. Moreover, by using high-frequency signal injection in the field winding, sensorless control independent from the saliency ratio of the machine can be achieved [7].…”

Section: Introductionmentioning

confidence: 99%

Estimation Algorithm for Current and Temperature of Field Winding in Electrically Excited Synchronous Machines With High-Frequency Brushless Exciters

Tang

Liu

Lundberg

2021

IEEE Trans. Power Electron.

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Electrically excited synchronous machines (EESMs) have become one of the potential alternatives to permanent magnet synchronous machines (PMSMs) in electric vehicles (EVs) to avoid rare-earth materials. Utilizing highfrequency brushless exciters for rotor excitation is a promising choice to reduce friction losses and maintenance effort and cost. However, with the usage of brushless exciters, the field current and temperature cannot be measured directly. In this paper, an algorithm is proposed to dynamically estimate the field current as well as the field winding temperature. The dc-link current is utilized as a feedback to correct the estimation. The performance of the estimation algorithm is initially evaluated in simulations and then verified by experimental measurements in a prototype. Based on the estimation algorithm, closed-loop control of the field current is developed and verified experimentally.

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“…Additionally, the excitation of the machine is controllable by adjusting the field current [5]. As the consequence, high starting torque and wide field weakening range can be achieved by utilizing EESMs in EV applications [6].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Current Control to Compensate for Magnetic Mutual Coupling in Electrically Excited Synchronous Machines

Tang

Liu

2020

2020 International Conference on Electrical Machines (ICEM)

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Electrically excited synchronous machines have become an attractive solution to electric vehicles. Equipped with a field winding in the rotor, the excitation of the machine is controllable. However, due to the magnetic mutual coupling between the stator and rotor windings, a voltage will be induced in the field winding in case of a current rise in the stator winding and vice versa. In this study, a dynamic current control algorithm with compensation for magnetic mutual coupling is proposed. A first-order response of current rise is expected. To achieve this, the controller consists of three parts. The first part is the feed forward of cross-coupling terms due to Park transform. The second part takes care of the resistances and selfinductances. The third part takes care of the mutual inductances. Finally, the outputs from the three parts are summed up to be the total output from the controller.

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Comparison of copper loss minimization and field current minimization for Electrically Excited Synchronous Motor in mild hybrid drives

Cited by 17 publications

References 13 publications

A Measurement Method of Determining the Power Supply Parameters for the Optimal Operation of a Synchronous Motor

A Measurement Method of Determining the Power Supply Parameters for the Optimal Operation of a Synchronous Motor

Estimation Algorithm for Current and Temperature of Field Winding in Electrically Excited Synchronous Machines With High-Frequency Brushless Exciters

Dynamic Current Control to Compensate for Magnetic Mutual Coupling in Electrically Excited Synchronous Machines

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