Results 21 to 30 of about 32,465 (267)

The stall torque of the bacterial flagellar motor

Biophysical Journal, 1987
The bacterial flagellar motor couples the flow of protons across the cytoplasmic membrane to the rotation of a helical flagellar filament. Using tethered cells, we have measured the stall torque required to block this rotation and compared it with the torque of the running motor over a wide range of values of proton-motive force and pH.
Meister, M., Berg, H.C.
openaire   +2 more sources

Fault Diagnosis of Fracturing Pump Based on Torque and Torque-Pressure Ratio Deviation Rate

Shiyou jixie, 2022
In order to quickly and effectively diagnose the fault of electric fracturing pump,according to its system characteristics,a fault diagnosis method of electric fracturing pump based on motor torque and torque-pressure ratio deviation rate was proposed by
Wang Bo, Wang Longting, Zhang Jinya
doaj  

Research on the influence of trapezoidal magnetization of bonded magnetic ring on cogging torque

Open Physics, 2023
In this article, the influence of trapezoidal magnetization method on cogging torque of permanent magnet motor is studied. First, the structure is analyzed by analytical method to explain its mechanism of reducing cogging torque. Then, in order to verify
Zhang Ze, Wang Zilong, Yu Juntao, Luo Yang, Yan Wenlong, Yang Yuanfei, Hu Tengfei, Yu Dunbo, Wang Li   +8 more
doaj   +1 more source

A novel PM motor with hybrid PM excitation and asymmetric rotor structure for high torque performance

AIP Advances, 2017
This paper proposes a novel permanent magnet (PM) motor for high torque performance, in which hybrid PM material and asymmetric rotor design are applied.
Gaohong Xu, Guohai Liu, Xinxin Du, Fangfang Bian   +3 more
doaj   +1 more source

Investigation on flat torque‐angle characteristic of torque motor based on magnetic saturation of tooth tip

IET Power Electronics, 2023
The flat torque‐angle characteristic of torque motor plays a decisive role in the control quality of electro‐hydraulic servo and proportional valve. To solve the issue that the current wet‐type torque motor for two‐dimensional (2D) valve does not have ...
Bin Meng, Liangqiang Zhu, Yaozhen Heng, Hao Xu, Sheng Li, Jian Ruan   +5 more
doaj   +1 more source

Multi-Objective Optimization Design of a New Permanent Magnet Synchronous Motor Based on the Taguchi Method

Energies, 2022
To improve the performance and stability of the permanent magnet synchronous motor (PMSM), a new type of built-in permanent magnet synchronous motor (IPMSMB) is proposed.
Chunyu Qu, Ziqi Guo, Yongzhuang Hu, Xiuping Wang, Fangxu Han   +4 more
doaj   +1 more source

Design and Investigation of a Low-Cogging-Torque and High-Torque-Density Double-Sided Permanent Magnet Motor

Energies
In this paper, a high-torque and low-cogging-torque double-sided permanent magnet (DS-PMFM) motor is proposed. The research focuses on adopting structure of stator split-tooth and unequal-width rotor poles, enabling the motor to have high output torque ...
Yuting Zhou, Zixuan Xiang, Qian Liu, Suiyuan Gui   +3 more
doaj   +1 more source

Torque Measurement and Control for Electric-Assisted Bike Considering Different External Load Conditions

Sensors, 2023
This paper proposes a novel torque measurement and control technique for cycling-assisted electric bikes (E-bikes) considering various external load conditions.
Ping-Jui Ho, Chen-Pei Yi, Yi-Jen Lin, Wei-Der Chung, Po-Huan Chou, Shih-Chin Yang   +5 more
doaj   +1 more source

The Study of the Salient Pole Geometry Optimization of the Flux Switching Permanent Magnet Machine

Actuators
The flux switching permanent magnet (FSPM) motor is a stator permanent magnet motor. The typical FSPM motor is doubly salient, which generates torque ripple and affects the rotation smoothness. In this paper, the influence of salient pole geometric sizes
Chen Liu, Dewei Xu, Wenwu Wu, Bo Yang
doaj   +1 more source

Design of direct torque control system of motor based on RBF neural network supervisio

Gong-kuang zidonghua, 2013
In view of problem of big torque ripple of motor when mine belt conveyor runs in low speed, the paper used RBF neural network supervision controller to replace PID controller on the basis of traditional direct torque control system of motor.
NIE Wen-yan, WANG Zhong-gen
doaj   +1 more source