Modeling of Magnetic Field and Transients in a Novel Permanent Magnet Valve Actuator

Waindok, Andrzej; Tomczuk, B.; Koteras, Dariusz

doi:10.3390/s20092709

Cited by 8 publications

(5 citation statements)

References 21 publications

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“…However, its disadvantage is a relatively long switching time. In [34], a bi-stable actuator with permanent magnets was presented. It is characterized by a good dynamic properties, simple construction, and low energy consumption.…”

Section: Effective Compression Ratiomentioning

confidence: 99%

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

et al. 2023

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This paper presents an empirical study of a spark-ignition internal combustion engine with modifications made to increase its effectiveness. The modification was implemented bi-directionally in terms of changes to the compression ratio and changes to the engine’s valve train. The compression ratio was increased by 2.3 units by design and a hybrid intake valve opening control was used in the engine’s valve train. The hybrid control involved autonomous control of one of the inlet valves with a dedicated electromagnetic actuator. The designed electromagnetic actuator was mounted downstream of the single-cylinder engine’s intake system’s modified camshaft to control the effective compression pressure build-up. Field calculations were carried out for the electromagnetic actuator’s design variants and its current characteristics were determined. The multivariate calculations were carried out in order to find the quasi-optimal geometry of the actuator. The width and height of magnetic field coils and the dimensions of the stator poles were changed, while maintaining the same external dimensions of the actuator to enable its mounting in the cylinder head system. In the next step, the prototype of the actuator was made and placed on the combustion engine in order to conduct the experimental investigations. The work was aimed at improving the internal combustion engine’s efficiency at the low load range, as this is load range in which it has low efficiency despite it being the most often used during normal vehicle operation. The original measurement stand was prepared, and many tests were carried out in order to investigate the influence of the electromagnetic valve on the combustion engine characteristic. This improved the internal combustion engine’s efficiency at its low-load range by up to 25%. Both calculation and measurement results are presented in form of graphs.

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Section: Effective Compression Ratiomentioning

confidence: 99%

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

et al. 2023

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“…In order to compare the measurement results quantitatively, the normalized root mean square error (NRMSE) was used. It is described by the following equation [ 33 ]:

where…”

Section: Mathematical Model Of the Current Shuntmentioning

confidence: 99%

Using a Current Shunt for the Purpose of High-Current Pulse Measurement

Piekielny

Waindok

2021

Sensors

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Measurement of high-current pulses is crucial in some special applications, e.g., electrodynamic accelerators (EA) and converters. In such cases, the current shunts have limitations concerning the frequency bandwidth. To overcome the problem, a method based on the shunt mathematical model is proposed. In the method, the solution of ordinary differential equations for the RL circuit is carried out in order to obtain the real current shape. To check the method, as a referee, a Rogowski coil dedicated to measuring high-current pulses was used. Additionally, the measurement results were compared with the mathematical model of the tested power supply system. Measurements were made for the short power supply circuit, which allows eliminating the nonlinearity. The calculations were carried out using a circuit model. In order to obtain the parameters of the shunt (resistance and inductance), it was modeled using an ANSYS/Q3D Extractor software. Comparison of calculation and measurement results confirms the correctness of our method. In order to compare results, the normalized root mean square error (NRMSE) was used.

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“…Then, the whole system of equations is solved at every simulation step; therefore, the simulation time is very long [ 15 , 16 ]. For the second variant of this simulation model—named a field-circuit indirectly coupled FEM—quantities like the magnetic force and flux linkages are calculated earlier, and they are incorporated into the simulation model as look-up tables [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…The most accurate results are obtained for dynamic simulation models based on the finite-element method. Unfortunately, the field-circuit directly coupled FEM is very time-consuming; therefore, the second variant of this simulation model has gained popularity [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Simulations of Transients in a Four-Pole Magnetic Bearing with Permanent Magnets

Wajnert,

Tomczuk

2024

Sensors

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This paper presents the design of and transient time simulations for a four-pole magnetic bearing with permanent magnets. The usage of permanent magnets reduces the consumption of electric energy in comparison to a traditional active magnetic bearing. Permanent magnets are installed in the yoke of the stator core to limit the cross-coupling of the magnetic flux generated by the windings. The first part of this paper presents the design of the magnetic bearing and its finite-element model, while the second part describes the field-circuit indirectly coupled finite-element model for the transient time simulation. The presented simulation model was used to calculate the transient response for the rotor lifting from the starting position, the step change in the rotor position and the change in the rotor position under an external impact force applied along the y-axis.

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Modeling of Magnetic Field and Transients in a Novel Permanent Magnet Valve Actuator

Cited by 8 publications

References 21 publications

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

Using a Current Shunt for the Purpose of High-Current Pulse Measurement

Simulations of Transients in a Four-Pole Magnetic Bearing with Permanent Magnets

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