Simulation-Based Energy and Power Analysis of Bldc Motor Under Vibration

Abstract

In contemporary times, the utilization of Brushless Direct Current (BLDC) motors in Hybrid vehicle propulsion has become increasingly prevalent due to their efficient performance and compact design. Frequently, these motors are mounted on the chassis frame using fastening methods, often resulting in the rear portion of the motor being left in a cantilevered configuration. This design approach primarily serves the purpose of allowing the motor to self-cool and dampen vibratory waves. The reinforcement of the BLDC motor within the frame relies heavily on the surrounding fastening cluster. We have conducted a comprehensive literature review to identify the most effective reinforcement methods for reducing vibration energy loss in the BLDC motor structure. Regrettably, leading BLDC motor manufacturers worldwide are not yet prepared to design motors based on performance in conjunction with chassis loading. Consequently, the challenges facing hybrid and electric vehicle manufacturers have grown as they must adapt their chassis designs to accommodate the BLDC motor and evaluate comprehensive vibration performance during assembly. The measurement of BLDC motor performance under load on a frame has emerged as a prominent focus in this study. This paper proposes an experimental investigation using a specified 4kW BLDC motor model, measuring displacement along the X, Y, and Z axes in mm/sec within a 1280 to 7500 RPM range, incrementing in 4 steps. For a torque range spanning from 0.3 to 0.4 N-m, the observed current varies between 1.7 and 8 amperes for the BLDC motor mounted on the frame. A dedicated BLDC motor fixture setup was established for vibration measurements using a vibrometer, with data transmission facilitated through an Arduino Uno to a laptop. Vibration velocity readings were recorded using MATLAB/Simulink software installed on the laptop and were cross-validated with other vibratory instruments connected to the BLDC motor via an Arduino Uno. The BLDC motor excitation displayed rapid acceleration from 1910 to 3700 RPM, as depicted in the graph. The proposed conclusion asserts that a motor inadequately fastened to the frame exhibits higher vibration velocity than a securely reinforced motor mounted on the chassis. This study could be further enhanced by employing a BLDC motor with a higher RPM range and conducting on-road measurements of these parameters to bolster this hypothesis.

Keywords: BLDC Motor, Arduino Uno, hardware connectivity via MATLAB/Simulink, power and energy performance