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31 results on '"Cao, Jichao"'

9. Design and research of permanent magnet synchronous motor controller for electric vehicle.

Author

Huang, Qi, Huang, Qiuhong, Guo, Hangcheng, and Cao, Jichao

Subjects
PERMANENT magnet motors, SYNCHRONOUS electric motors, ELECTRIC propulsion, ELECTRONIC equipment, SPEED limits, EXPERIMENTAL design
Abstract

Permanent magnet synchronous motors (PMSM) have high power density, stable output torque, low noise, and good speed regulation performance, making them very suitable for electric vehicle propulsion. In this paper, a PMSM controller, based on Renesas MCU, is designed. To meet the requirements of small size, lightweight, wide speed range, and power generation of the PMSM controller the design has been carried out from three aspects: hardware circuit, structural components, and software algorithm, including electronic component selection, hardware protection circuit, printed circuit board layout, control algorithm, structural strength, and the cooling channel. The controller prototype was produced and an experimental platform was built. The controller efficiency test, generator test, field weakening test, and temperature rise test were carried out. The experimental results verify the rationality of the design scheme. Compared with earlier motor controllers, this controller is small in size, light in weight with low cost. [ABSTRACT FROM AUTHOR]

Published
2023
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10. Design and research of deep slot universal motor for electric power tools

Author

Xi Wei, Cao Jichao, Huang Qi, and Luo Ling

Subjects
Universal motor, Offset (computer science), Computer science, 020208 electrical & electronic engineering, Mechanical engineering, 020302 automobile design & engineering, 02 engineering and technology, 0203 mechanical engineering, Control and Systems Engineering, Electromagnetic coil, Power electronics, Magnet, 0202 electrical engineering, electronic engineering, information engineering, Commutation, Electric power, Electrical and Electronic Engineering, Air gap (plumbing)
Abstract

In this paper, a deep slot universal motor is designed for electric power tools. The deep slot structure can reduce the cost of universal motor materials and improve production efficiency. A mathematical model of a universal motor is established and a simulation model is established by MagNet finite element software. Then, the static magnetic field distribution and load characteristics of the deep slot universal motor are analyzed. Different methods are adopted to improve the commutation spark of a deep slot universal motor. Finally, three 550-W and 9500-rpm prototype motors are tested. Simulation and experimental results indicate that an uneven air gap, brush offset by a certain angle, as well as different turns of the lead coil and the lag coil can effectively improve the commutation spark of a deep slot universal motor.

Published
2020

20. Investigations on High Reliability Permanent Magnet Motor Controller for Electric Vehicle

Author

Luo Ling, Cao Jichao, and Huang Qi

Subjects
Microcontroller, business.product_category, Reliability (semiconductor), Electricity generation, Motor controller, Computer science, Control theory, Electric vehicle, AC power, business, Automotive engineering, Power (physics)
Abstract

Electric vehicles are gradually becoming a means of transportation for people, and their technical reliability and safety are very high. The motor controller is a device that converts the battery DC power supply to the three-phase AC power source, and drives the output power of the permanent magnet synchronous motor. This paper designs a permanent magnet motor controller based on Renesas microcontroller. The analysis is carried out from the aspects of component selection, hardware protection structure principle, PCB layout, control algorithm, structural strength and thermal analysis. Finally, the prototype controller is produced and the experimental platform is built. The efficiency characteristic test, power generation test and temperature rise test were performed on the permanent magnet synchronous motor controller. The experimental results verify the rationality of the design.

Published
2019

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