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Technical Brief

Multiphysics Simulation of a Printed Circuit Board

When evaluating printed circuit board (PCB) designs, engineers must balance the requirements of multiple physics disciplines in optimizing PCB reliability. R&D teams must closely study three broad areas of product reliability -- electrical, thermal and mechanical -- to produce PCB designs that contribute to long service life and reduced product failure. You can use ANSYS software in an integrated fashion to examine the overall reliability of a printed circuit board, simulating individual physical phenomena as well as the interaction between physics disciplines to improve overall product performance.

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Technical Brief

Solving DC Power Distribution Problems

This paper provides an overview of packaging topologies that are expected to be implemented within the next fi ve years. Because these technologies incorporate PCBs, system-level analysis is mandatory to ensure fi rst-pass system success.

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Technical Brief

Negative Mutual Inductance in 2-D Extractor

Sometimes 2-D Extractor (a capability within ANSYS Q3D Extractor) returns an inductance (L) matrix with entries that cause concern. Some users are surprised to see a negative off-diagonal term in the inductance matrix (mutual inductance) because these entries are often all positive. These results are correct and not a cause for worry.

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Technical Brief

AC Motor Drive Using Cosimulation

Motors integrated with advanced power-electronic converters enable more-efficient operation and deliver improved performance. However, these integrated electronic designs pose signifi cant challenges to design engineers. When designing an AC drive, engineers face a wide variety of problems in combining several engineering domains that interact within the device. Using the ANSYS motor and drive design workfl ow off ers many advantages for this application.

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Technical Brief

LTI-ROM for Battery Thermal Management

Battery thermal management for high-power applications such as electric vehicles (EVs) and hybrid electrical vehicles (HEVs) is crucial to prevent thermal runaway. This application brief describes a reduced-order model (ROM) for battery thermal management, called LTI ROM, based on properties of linear and time-invariant (LTI) systems. The LTI-ROM is shown to provide very similar results to those from computational fluid dynamics (CFD) under any transient power dissipation. The ROM runs orders of magnitude faster than the original CFD model.

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Technical Brief

Power Cable Analysis

Power cables, such as those found in subsea oil fi eld operations, carry megawatts of power to a variety of mission-critical pumps and motors. Several cables can be bundled together into umbilicals that supply power to separate loads from a single source. Since these cables can be very costly to design, manufacture and maintain, the analysis underlying their specifi cation must be thorough and accurate.

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Technical Brief

Model Order Reduction for Battery Thermal Management

Battery thermal management for high-power applications such as electric vehicles (EVs) and hybrid electrical vehicles (HEVs) is crucial to prevent thermal runaway. A reduced-order model (ROM) for battery thermal management is based on transfer function. In this application brief, the ROM is shown to provide very similar results to those from computational fl uid dynamics (CFD) under any transient power dissipation. The ROM runs orders of magnitude faster than the original CFD model.

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Technical Brief

Control Systems in ANSYS Simplorer

Control systems can be realized in ANSYS Simplorer in several ways; the software’s flexibility allows users to select the desired modeling method. Simplorer off ers robust implementation of included library components for controls. It also enables the use of third-party tools for integrating existing control systems into Simplorer multiphysics simulations, which may comprise various electrical, digital, electromechanical, mechanical, thermal or fl uidic components. Applications include HEVs, renewable energy (wind, solar, micro-grids, etc.), wireless power transfer, and other power electronic and electrical distribution systems.

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Technical Brief

Advanced Design of Electric Machines Using the ANSYS Electric Machine Design Toolkit

Computation of efficiency maps is critical but can be laborious in designing an electrical machine. ANSYS off ers a user-friendly electric machine design toolkit integrated into ANSYS Maxwell. The toolkit allows for the computation and display of torque speed curves, efficiency maps and other performance curves for electrical machines.

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Technical Brief

Robotic Arm System

A robotic system can be modeled using a state-of-the-art cosimulation feature in ANSYS Simplorer that enables direct linking to the rigid dynamics solver within ANSYS Mechanical. This transient-to-transient link allows engineers to combine detailed rigid mechanics models with power electronics, electric servo drives and control system models in one simulation environment. Advanced analysis capabilities can then determine the dynamic response of an assembly of rigid bodies linked by joints, such as a robotic arm or a crankshaft system.

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