Influence of Adhesive Tapes as Thermal Interface Materials on the Thermal Load of a Compact Electrical Machine

Abstract

In this article, a novel form of thermal interface material (TIM), represented by three industrially manufactured pressure-sensitive adhesive (PSA) tapes with electrical insulating properties, is characterized regarding its applicability in an electric motor with air-gap winding. Firstly, the adhesion performances, in terms of the winding process, were investigated experimentally. Here, every TIM shows sufficient shear strength for the wire–TIM joints, as well as peel adhesion to the laminated iron core. Secondly, the thermal–physical properties of the TIMs are inspected experimentally via laser flash analysis (LFA) and differential scanning calorimetry (DSC). For every TIM, the value of the thermal resistance can double if the relatively smooth surface (Ra = 0.2 μm) of the adjacent layers is interchanged with a rougher one (Ra = 2.0–3.7 μm). Additionally, the TIM’s performance at the system level is examined. Therefore, a flat test section, according to the specifications of the original motor, is studied experimentally and numerically utilizing infrared (IR) thermography and the finite element method (FEM). The focus is set on the heat flow and temperature distribution in the test section under varying thermal loads, mass flow, and variety of TIMs.

The Impact of a Combined Battery Thermal Management and Safety System Utilizing Polymer Mini-Channel Cold Plates on the Thermal Runaway and Its Propagation

“…Industrial manufacturers typically use Thermal Interface Materials (TIMs) in the form of conductive pastes and adhesives for contact resistance reduction. A previous paper showed that TIMs usually embody one of the largest thermal resistances in a cooling system [104]. Furthermore, they complicate the recycling of battery systems.…”

“…In the case of TR, evidence of protection regarding TRP to the adjacent cell is investigated. A variation in the fluid inlet temperature significantly affects heat transfer [104,105]. At 5 • C, it might impact the cell's internal process chain the most because a significant temperature difference between the cold plate and the battery is created.…”

Stator Imbalance Defects Diagnosis of Induction Machine Using Thermography and Machine Learning Algorithms

“…On the other hand, methods relying on remote Infrared Thermography (IRT) provide a less burdensome and Non-Destructive Technique (NDT) alternative [9], [12], [13]. IRT relies on infrared thermal cameras and has become indispensable in various fields, including industry [9], [12], [14], [15], and medical applications [16]- [19]. An experimental study in [20] has even used IRT to measure the severity of cuts in a steel rope subjected to significant mechanical stress, as temperature variations in critical points depend on the tensile force applied.…”

Performance Analysis of Conventional IPMSM and NCPM Based IPMSM

“…The TIM is represented by three industrially produced electrically insulating pressure-sensitive adhesive (PSA) tapes. First, experimental research on the adhesion performances of the winding procedure was performed [25]. In order to enhance the motor control performance of a three-phase four-switch (TPFS) inverter-fed permanent magnet synchronous motor (PMSM) drive system, this research offers a suppression approach of the capacitor voltage offset based on reference voltage self-correction [26].…”