Power Devices Selection, Magnetic Design and Thermal Consideration for Power Supply (AC71-32-0)

SynopsisSwitch Mode Power Supply (SMPS) utilizes solid state switching devices operating in high frequency digital mode to deliver well-regulated DC outputs that are essential to drive a wide variety of today’s electronics equipment and systems. Unlike other technologies which usually require knowledge in only one key area, SMPS encompasses a wide range of knowledge in areas that include power engineering, high frequency electronics design, control loop design, understanding of component and device characteristics, EMI and PCB layout. As an essential part of all electronic equipment and systems, it is important that engineers and technicians whose work involve the design, production and integration of SPMS into other systems to have a sound knowledge on the working principles and various aspects of a SMPS.

The objective of this course is to familiarize the participating individuals with the practical and design aspects of power semiconductor devices and passive components, including their applications in various electronic systems. In order to provide a comprehensive understanding of selection of devices and power electronic circuit design considerations, coverage from the basic device physics to device structures and characteristics would be provided. The control and protection of power semiconductor devices would be covered in detail, as well as the characteristics and design considerations of passive components such as heat sinks, inductors and transformers.

Course Highlight
After participating in this course, the course participant is expected to gain a good understanding of the theory and industrial applications of power semiconductor and passive devices, their protection aspects, and their applications in power conversion techniques. Participants would be at ease with the selection of active and passive devices, designing control and protection circuits for them and planning the layout of power electronic circuits. The practicing engineer would be able to trouble-shoot failures in power electronic equipment. Participants in the research area would be better prepared when required to conduct research and design work in power electronics.

What You Will Learn

• Theory and industrial applications of power semiconductor and passive devices, their protection aspects, and their applications in power conversion techniques
• Selection of active and passive devices, designing control and protection circuits for them and planning the layout of power electronic circuits
• Troubleshoot failures in power electronic equipment

Who Should AttendEngineers and technicians who work with SMPS in the role of :

• design and development
• product engineering
• test development
• application engineering
• product marketing
• testing
• system architect

PrerequisiteTechnical background or working experience with electronic design or SMPS.

Course MethodologyThis course is presented classroom style, with case studies to illustrate the concepts taught.

Course Duration2 days, 9am - 5pm

Course Structure1) Overview of Power Electronics and Semiconductor Physics

• Introduction to power electronic systems
• Overview of power switches
• Power semiconductor physics

2) Power Diodes and Thyristors

• Basic structures of power diodes
• Conventional thyristors
• Gate-turn-off (GTO) thyristors
• Integrated-gate-commutated thyristors
• Physics of device operation
• Static characteristics
• Dynamic characteristics
• Breakdown voltages
• On-state and switching losses
• Safe operating areas
• Rating considerations

3) Power Transistors

• Basic structures of power BJT, power MOSFET and insulated gate bipolar transistors
• Physics of device operation
• Static characteristics
• Dynamic characteristics
• Breakdown voltages
• On-state and switching losses
• Second breakdown and latch-up
• Device limits and safe operating areas
• Rating considerations

4) Control and Protection of Devices

• Applications and types of snubber circuits: turn-on, turn-off, over-voltage, energy recovery and active snubbers
• Thyristor trigger circuits
• Base drives for power BJT
• Gate drives for MOS-gated devices
• Turn-off circuits for GTO thyristors
• Device protection in drive circuits
• Power circuit layout considerations

5) Passive Components and Magnetics

• Power resistors
• Heat transfer by conduction, convection and radiation
• Heat sink design
• Soft and high-frequency magnetic materials
• Saturation and losses in magnetic cores
• Magnetic flux reset methods in converters
• Inductor and transformer core selection and winding design
• Power capacitor type, selection and loss computation