Low cost SMC brushless DC motors for high volume applications in the automotive sector

2004 ◽  
Author(s):  
A.G. Jack
Keyword(s):  
Low Cost ◽  
High Volume ◽  
Automotive Sector ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors

Performance and Selection of Brushless DC Motors for Miniature Hydraulic Powertrains

2020 ◽  
Author(s):  
Logan T. Williams
Keyword(s):  
Power Systems ◽  
Low Cost ◽  
Naval Research ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors ◽  
Wide Range ◽  
The Us ◽  
Shaft Power ◽  
Prime Movers

Abstract Increased interest in battery-powered hydraulic quadrupeds at the US Naval Research Laboratory has created demand for compact hydraulic power units with electric prime movers. Brushless DC (BLDC) motors are compact, high-power systems that can provide the shaft power for a hydraulic pump. The remote-control hobby industry offers a wide range of low-cost BLDC motors that can be utilized for miniature, power-dense hydraulic powertrains. However, most of these motors are sold with minimal specifications that prevent accurate prediction of the motor performance, impeding precise motor selection. An analytical model has been developed to provide an upper bound on a motor’s performance based on the motor constant and the motor phase impedance. Experimental performance of multiple motors are used to validate the model and demonstrate its efficacy for motor selection.

scholarly journals Current Spikes Minimization Method for Three-Phase Permanent Magnet Brushless DC Motor with Real-Time Implementation

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3206 ◽  
Author(s):  
Mohamed Dahbi ◽  
Said Doubabi ◽  
Ahmed Rachid
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Experimental Tests ◽  
Minimization Method ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors ◽  
Large Current ◽  
Start Up ◽  
Permanent Magnet Brushless Dc

Due to their high efficiency and low cost of maintenance, brushless DC motors (BLDCMs) with trapezoidal electromotive forces (back-EMFs), have become widely used in various applications such as aerospace, electric vehicles, industrial uses, and robotics. However, they suffer from large current ripples and current spikes. In this paper, a new method for minimizing current spikes appearing during BLDCM start-up or sudden set point changes is proposed. The method is based on controlling the MOSFET gates of the motor driver using R-C filters. These filters are placed between the PWM control signal generator and the MOSFET gates to smooth these control signals. The analysis of the proposed method showed that the R-C filter usage affects the BLDCM steady-state performances. To overcome this limitation, the R-C filter circuit was activated only during current spikes detection. The effectiveness of the proposed method was analytically analyzed and then validated through simulation and experimental tests. The obtained results allowed a reduction of 13% in current spikes amplitude.

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