Sensorless Startup Strategy for a 315-kW High-Speed Brushless DC Motor With Small Inductance and Nonideal Back EMF

2019 ◽  
Vol 66 (3) ◽  
pp. 1703-1714 ◽  
Author(s):  
Shaohua Chen ◽  
Gang Liu ◽  
Lianqing Zhu
Keyword(s):  
High Speed ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Small Inductance

Position Detection Methods of Position Sensor-Less Brushless DC Motor

2011 ◽  
Vol 179-180 ◽  
pp. 707-712
Author(s):  
Hua Ji ◽  
Zhen Yun Han ◽  
Hong Li Liu
Keyword(s):  
High Speed ◽  
Control Method ◽  
Dc Motor ◽  
Detection Methods ◽  
Brushless Dc Motor ◽  
Position Sensor ◽  
Less Is More ◽  
Rotor Position ◽  
Brushless Dc ◽  
Position Detection

With the widely use of Permanent Magnet Brushless DC Motor (BLDCM) in many fields, the superiority in the control method of position sensor-less is more and more obvious. In this paper several control methods of position sensor-less for BLDCM are presents, and a novel technique, the method of speed-independent position function, is introduced to detect the rotor position of BLDCM. This method may detect the rotor position from almost zero speed to high speed, and may also give the commutation time.

Instantaneous Torque Control of Small Inductance Brushless DC Motor

2012 ◽  
Vol 27 (12) ◽  
pp. 4952-4964 ◽  
Author(s):  
Jiancheng Fang ◽  
Xinxiu Zhou ◽  
Gang Liu
Keyword(s):  
Dc Motor ◽  
Torque Control ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Small Inductance

A Novel Speed Sensorless Control of Brushless DC Motor in Position Servo System

2011 ◽  
Vol 383-390 ◽  
pp. 4424-4431
Author(s):  
Chang Chun Chen ◽  
Jia Dan Wei ◽  
Bo Zhou ◽  
Guo Sheng Li
Keyword(s):  
High Speed ◽  
Short Pulse ◽  
Sensorless Control ◽  
Servo System ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Speed Sensorless ◽  
Zero Crossing ◽  
Brushless Dc ◽  
Position Servo

Zero crossing points of Back-Electromotive force (EMF) is the most mature and widely used method of the speed sensorless control of brushless DC motor (BLDCM). However, with the poor performance from standstill to low speed, it is not suitable for the position servo system. Therefore, this paper first analyzes several conventional speed sensorless control schemes in the BLDCM, then presents a novel control algorithms for the BLDCM. In the proposed method, the short pulse sensing method for the rotor position in the Start-Up process and self-synchronization with zero cross points of back-EMF are combined together. As a result, the BLDCM used in the position servo system can be easily controlled from zero to high speed, the theoretical analysis is verified by the simulation results based on Matlab, it shows that the proposed algorithms can improve the performances of position servo system compared with the conventional methods.

Thermal Analysis of a Fluid Immersed Brushless DC Motor for Aerospace Applications

2013 ◽  
Vol 416-417 ◽  
pp. 1126-1131
Author(s):  
Wei Chen ◽  
Xiao Yan Huang ◽  
Jien Ma ◽  
You Tong Fang
Keyword(s):  
Thermal Behavior ◽  
High Speed ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Cfd Model ◽  
Brushless Dc ◽  
Aerospace Applications ◽  
Actuation System ◽  
Computational Fluid Dynamics Cfd ◽  
Permanent Magnet Brushless Dc

In this paper, the thermal behavior of a 12kW, 12000rpm, wet-type Permanent Magnet Brushless DC motor (BLDC) with skydrol oil inside designed for electro-hydraulic actuation system (EHA) was analyzed. A 3-D computational fluid dynamics (CFD) model has been built. The influence of skydrol hydraulic oil in thermal behavior at both low-speed and high-speed conditions was discussed. The results confirm that the skydrol oil passing through the motor has different impact on the thermal performance in different conditions.

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