Optimum shape design of a BLDC motor for electric continuous variable valve timing system considering efficiency and torque characteristics

Baek, Soo-Whang

doi:10.1007/s00542-018-3991-2

Cited by 9 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Through the triangle "BDC" and "BDC' ", "δ" can be obtained, and "δ' " can be obtained by substituting it into equations ( 3), ( 4), (5). Finally, according to the relationship between the output cam angle and the follower lift, the follower's lift "L(β')" can be obtained.…”

Section: Kinetic Modelmentioning

confidence: 99%

“…Continuous variable valve train is widely used because of its low cost to improve the fuel economy of various internal combustion engines and reduce NOx emissions [3][4] . The traditional CVVL mechanism must be used in conjunction with the camshaft phase modulation mechanism to meet the requirements of the internal combustion engine for valve opening and closing timing [5][6] [7] , such as BMW's Valvetronic mechanism [8] , Nissan's VVEL mechanism [9] . Because the above mechanism only has the variable motion characteristics that the valve closing timing is advanced with the delay of the valve opening timing, it can only be applied to the double overhead camshaft internal combustion engine with different intake and exhaust cams, but it cannot be used to the single camshaft internal combustion engine (including marine medium and high-speed internal combustion engines) [10] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of structural parameters on the motion variability of the continuously variable valve mechanism

Cui

Yang

2023

Third International Conference on Mechanical Design and Simulation (MDS 2023)

View full text Add to dashboard Cite

Facing the significant demand for energy saving and emission reduction in the internal combustion engine industry, a new continuous variable valve mechanism (CVVM) is designed for marine medium and high-speed internal combustion engines. By building a single-degree-of-freedom mathematical model, the influence of eccentric shaft position, eccentricity, and input rocker arm ratio on the variable characteristics of the mechanical motion is studied. The results show that the single-degree-of-freedom mathematical model is accurate and can be used to research mechanism motion variability. Under different vital structural parameters, the mechanism exhibits four variable motion modes with the adjustment of the phase of the eccentric wheel. For the continuously variable Miller mode, when the input rocker arm of the mechanism is constant, and the initial position is the same, the valve motion interference phenomenon is more serious when the eccentric shaft position is farther away from the camshaft, the eccentricity is more extensive, and the input rocker arm ratio is larger. The maximum lift of the valve is unchanged under the influence of eccentricity, and the larger the input rocker ratio, the greater the maximum lift of the valve.

show abstract

Section: Kinetic Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of structural parameters on the motion variability of the continuously variable valve mechanism

Cui

Yang

2023

Third International Conference on Mechanical Design and Simulation (MDS 2023)

View full text Add to dashboard Cite

show abstract

“…Islam et al 17 uses the global response surface method to optimize the multi-objective and multi-load point design of IPMSM to achieve low torque ripple and high average torque in the whole speed range. Baek 18 proposed a shape optimization design method of Brushless DC (BLDC) motor for electric continuous variable valve timing (E-CVVT) system of internal combustion engine and hybrid electric vehicle. The proposed design aims to maximize the maximum torque and rated efficiency of BLDC motor and minimize cogging torque.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed design aims to maximize the maximum torque and rated efficiency of BLDC motor and minimize cogging torque. 18 Wang et al 19 proposed a multi-objective optimization algorithm to determine the rotor design parameters which maximize the output torque of the PMSM over three different load conditions (no load, rated load, and maximum speed load). El-Nemr et al 20 proposed an optimal design methodology for SRM using the non-dominated sorting genetic algorithm (NSGA-II) optimization technique.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of the hollow shaft direct drive motor

Wang

Gong

Liu

2023

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Surface permanent magnet synchronous motor (SPMSM) is widely used in low-speed and high torque permanent magnet synchronous motor. A multi-objective optimization method of hollow shaft direct drive motor (HSDDM) for double direct drive feed system (DDFS) is proposed in this paper. Several dimensions of HSDDM are considered in the proposed design procedure including pole embrace, thickness of magnet, eccentric distance, and air gap length. A multi-objective optimization model is established to minimize cogging torque, maximize efficiency, and minimize the magnet weight. The Optimized Latin hypercube sampling (OLHS) is used to design the experimental samples, and the sampling results are calculated by the finite element method (FEM). The Kring approximate model is established according to the sampling results. Based on the established approximate model, NSGA II multi-objective genetic algorithm is used to optimize the HSDDM. Compared with that before optimization, the efficiency after optimization is increased by 4.08%, the cogging torque is reduced by 86.78%, and the magnet weight is reduced by 20.24%. Eventually, the integration of NSGA-II and FEM provides an effective approach to obtain the optimal design of HSDDM.

show abstract

“…The processor must complete these tasks simultaneously in a very short time. Several studies show the capability of performing tasks with another type of processor using variations of counter and register [6], dynamic mathematical model processor [11], field-programmable gate array (FPGA) [12][13][14], module controlled with dSpace MicroAutoBox [15], data acquisition control integrator with computer [16], low-cost microcontroller [17][18][19] or just using data logger [20].…”

Section: Introductionmentioning

confidence: 99%

Development of Electronic Valve Timing Control Unit for Single Piston Expander with Microcontroller

Ali

Zakaria

Mohamad

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

An electronic valve timing control unit has been developed mainly for the internal combustion engine operation. This study aims to implement a similar technology into a single-piston expander (SPE) with readily available and low-cost microcontrollers. The study used an Arduino Mega 2560 and ESP32-WROOM microcontrollers to control the valve timing with the rotational input signal obtained from an absolute encoder. The SPE has been expected to run at the rotational speed of up to 2000 rpm. This setup was prepared to simulate the actual SPE operation using a direct current motor to drive the spindle connected to the encoder shaft to create a similar hardware testing and controlled environment. The study aims to identify the efficiency of the microcontroller’s performance with a variation of the valve’s opening and closing time. Results have shown that the clock rate of the microcontroller affects the performance of valve timing response. By increasing the clock rate, the microcontroller can control the valve at a higher speed.

show abstract

Optimum shape design of a BLDC motor for electric continuous variable valve timing system considering efficiency and torque characteristics

Cited by 9 publications

References 11 publications

Effects of structural parameters on the motion variability of the continuously variable valve mechanism

Effects of structural parameters on the motion variability of the continuously variable valve mechanism

Multi-objective optimization of the hollow shaft direct drive motor

Development of Electronic Valve Timing Control Unit for Single Piston Expander with Microcontroller

Contact Info

Product

Resources

About