Showing posts with label Power-Electronics-Design. Show all posts
Showing posts with label Power-Electronics-Design. Show all posts

Wednesday, March 01, 2017

The MOSFET in Power Electronics

delabs Notes - In a Circuit Module, if all Power and Signal Polarities are reversed. All NPN to PNP, All N-Channel to P-Channel and Vice Versa. All Diodes and Caps too turned around. This Topsy Turvy or Mirror Design ought to work in Theory. It has worked for some circuits in practice too in my experience. ?

Some believe that N-Channel is more Robust than the P Type. In Bipolar Transistor NPN is more trusted for the final output stages. The NPN Transistor and N-Channel turn-on by a Positive control bias. It may be inappropriate to say this mosfet is NPN or PNP.

The MOSFET in Power Electronics

The traditional metal–oxide–semiconductor (MOS) structure is obtained by growing a layer of silicon dioxide (SiO2) on top of a silicon substrate and depositing a layer of metal or polycrystalline silicon (the latter is commonly used). As the silicon dioxide is a dielectric material, its structure is equivalent to a planar capacitor, with one of the electrodes replaced by a semiconductor.

If the MOSFET is an n-channel or nMOS FET, then the source and drain are "n+" regions and the body is a "p" region. If the MOSFET is a p-channel or pMOS FET, then the source and drain are "p+" regions and the body is a "n" region. The source is so named because it is the source of the charge carriers (electrons for n-channel, holes for p-channel) that flow through the channel; similarly, the drain is where the charge carriers leave the channel. MOSFET - Wikipedia

This application note discusses the breakdown voltage, on-resistance, transconductance, threshold voltage, diode forward voltage, power dissipation, dynamic characteristics, gate charge and dV/dt capability of the power MOSFET.
Application Note AN-1084 Power MOSFET Basics - IRF

A MOSFET is a transistor. It is a Metal Oxide Field Effect Transistor. Here are the symbols for FETs and MOSFETs: The MOSFET How the MOSFET works

The conductivity of the path from Source to drain is controlled by applying a voltage between the gate and the body of the semiconductor. N-channel enhancement MOSFET

See this simple circuit that explains everything
n-channel MOSFET switch - George Watson, Univ. of Delaware, 1996.

Monday, February 06, 2017

Induction Heating - Cooker Project

Single plate induction cooker demonstration board  Uses ST7LITE09 and STGW40NC60WD (40 A, W series).

The design is entirely controlled by a simple ST7FLITE09Y0 8-bit microcontroller, which  provides the PWM driving signals, communicates information to the user interface, and  drives the fan and relay control to the plate feedback.

With Single Voltage Flash Memory, Data Eeprom, Adc, Timers, Spi Active - ST7LITE09Y0 8-Bit Mcu

Induction Heating - Cooker Project

A single plate induction cooker with the ST7FLITE09Y0  PDF - Excerpt From Application Note above AN2383 Application note -

Put simply, an induction cooking element (what on a gas stove would be called a "burner") is a special kind of transformer. When a good-sized piece of magnetically conducting material such as, for example, a cast-iron frying pan, is placed in the magnetic field created by the cooking element, the field transfers ("induces") energy into the metal. That transferred energy causes the metal - the cooking vessel - to become hot.

By controlling the intensity of the magnetic field, we can control the amount of heat being generated in the cooking vessel and we can change that amount instantaneously.

Induction cooking functions based on the principle of the series L-C resonant circuit, where the inductance L is the cooking element itself. By changing the switching frequency of the high voltage half-bridge driver, the alternating current flowing through the cooking element changes its value. The intensity of the magnetic field and therefore the heating energy can be controlled this way.

Induction Cooker - STMicro AN2383

The +325 V DC link voltage is applied through a filter to the upper-side IGBT only when the safety relay is closed and the system is on. Components inside the dotted rectangle are the core part of the power stage: the L-C resonant tank is obtained by the plate (represented in the schematic by a spiral) and the capacitors on the left side. The resonant capacitor has been divided in two identical capacitors, so that the amount of current flowing through each capacitor is reduced by half, while the voltage to the capacitors remains the same.

Induction heating is a non-contact heating process - Richie's Tesla Coil Web Page

Friday, May 06, 2016

LM2575 - Buck Adjustable Switching Regulator

"The buck-boost regulator circuit delivers -5V output. I hoped this would a nice way to generate a negative voltage for e.g. an LCD-display. However this circuit requires component values that are similar to the buck regulator at high load."

Experiments with the LM2575

Here is a nice way of using this regulator, this can be used for CMOS opamps as you have a -5V too. That means a portable instrument may find this design useful.

The TI Datasheet Layout Guidelines

LM2575 Switching Regulator
LM2575 - Step-Down Adjustable Voltage Switching Regulator with Output Enable

The LM2575 represents a superior alternative to  popular three-terminal linear regulators. Due to its
high efficiency, it significantly reduces the size of the heat sink.

The device also offers internal frequency compensation, a fixed-frequency oscillator, cycle-by-cycle current limiting, and thermal shutdown.

Monday, December 08, 2014

Battery Charger and Rechargeable Batteries

The main Types of Rechargeable Batteries are NiCd - Lead Acid - NiMH - Lithium ion. The Gel Lead Acid Battery is Termed Maintenance Free and may have to be treated differently for charging.

List of battery sizes - Wikipedia

Battery Types and their Sizes

4.5 Volt - D - C - AA - AAA - 9 Volt - SR41/AG3 - SR44/AG13

Battery Charger Circuits and Resources

Solar charger for lead-acid batteries
The charger will stop charging once a pre-set voltage (temperature compensated) has been reached, and recommence charging when the voltage has dropped off sufficiently.

12 Volt Gel Cell Charger
When a discharged gel cell is connected, the charger goes into a fast charge mode at a fixed rate of 400 ma. After the chip detects the voltage leveling off or when 4 1/2 hours has elapsed.

Temperature Controlled NiCd Charger
This circuit is for a temperature controlled constant current battery charger. It works with NICD, NIMH, and other rechargeable cells.

Battery charger 150-1700 mAh with PIC16F876
This is the extension of the simple battery charger to different battery capacities. The software and the controller are largely identical.

MAX846A Cost-Saving, Multichemistry, Battery Charge Chip
In its simplest application, the MAX846A is a stand-alone, current-limited float voltage source that charges Li-Ion cells. It can also be paired up with a low-cost microcontroller (┬ÁC) to build a universal charger capable of charging Li-Ion, NiMH, and NiCd cells.

Rechargeable Batteries and Chargers
There are three types of rechargeable batteries. They are Nickel-Cadmium (NiCd), which are the oldest type; Nickel-Metal Hydride (NiMH), which were developed around the same time that low-cost digital cameras were invented.

Monday, January 07, 2013

True Power Research - Robert W. Stowe

True Power Research provides power electronics consulting expertise to manufacturers, consultants, university research programs, research agencies, and start-up investors. Custom Power Supply Designs

True Power Research - Robert W. Stowe

DC to DC, AC to DC, and DC to AC conversion methods. Switch mode as well as linear power supplies. Specialized in high voltage power supplies and low noise and low ripple power supplies.
True Power Research - Robert W. Stowe

The Isolated Power Supply — A Tutorial

Safety -

"Electronic power supplies commonly process dangerous voltages with low impedances. Isolation is often required to prevent operator contact with dangerous voltages. Transformers used within power supplies function as a safety isolation transformer."

True Power Research
Robert W. Stowe (Bob) - Power Supply Design Consultant

850 10th St., Berthoud, CO 80513, USA

Monday, May 16, 2011

IXYS Semiconductors - Power and RF

Develops and Manufactures products to improve power conversion efficiency. Integrated circuits and RF power devices. ASICs, Pulsed Power Systems and Laser Diode Drivers also in their product portfolio. RF

IXYS Semiconductors - Power and RF

They have HVIC chips for medical, telecommunication and power management applications including off AC line LED drivers. They also Zilog family of MCU's after Zilog Corporation became an IXYS Company.

IXYS Semiconductors

They have under their Umbrella ...

MicroWave Technology, Inc. is a leading manufacturer of RF & Microwave Discrete Semiconductor Products.

Clare, Inc., A leader in the design and manufacture of solid state relays and high voltage integrated circuits. Shown on right is the IXDN609 a 9 Amp Low-Side Ultrafast MOSFET Driver.

Founded 1983, Corporate headquarters in Milpitas, California.

Address -1590 Buckeye Drive Milpitas, CA 95035-7418 United States.

Tuesday, December 08, 2009

Hendon Semiconductors - Microelectronics Design

Products include integrated circuits (silicon chips) in Bipolar, Bi-CMOS and CMOS technologies, thick film hybrids (ceramic substrate) and surface mounted printed circuit board assemblies and modules.

Hendon Semiconductors - Microelectronics Design

History -"The Hendon business site in Adelaide, South Australia has been a long established integrated circuit design and wafer fabrication facility in Australia, from its Philips semiconductor background up to 1997..."

Hendon Semiconductors - Microelectronics Design

Thick Film Hybrid Technology

The advantage of ceramic hybrids over fiberglass printed circuit is their high reliability due to their inherent rugged construction with the following advantages:

Hendon Semiconductors Pty. Ltd
ABN: 17 080 879 616, 1 Butler Drive, Hendon, South Australia 5014, Australia.    

Monday, January 12, 2009

PowerEsim - Design Power Supply Online

PowerEsim - Design Power Supply Online

PowerESIM is a eCAD tool for switching power supplies on the Internet. Web Based Switching Power Supply design and Simulation.

Interactive Power Electronics Seminar

The interactive and animated applets are part of the Introductory Course on Power Electronics taught by Prof. Kolar at the ETH Zurich.

Interactive Power Electronics Seminar

Interactive Power Electronics Seminar

Power Electronics Circuit Simulation

Applets to See - are the simple Buck-converter and the Rotating Three-Dimensional Field
More pages of Compulsory Reading for Students
  • Part I - An Overview of AC/AC-Converter Topologies
  • iPES-Circuits - DC/DC converters, thyristor converter, AC/DC inverter.
  • iPES-Circuits+ - Power electronic systems of higher complexity in industry.
  • iPES-Thermal - Dimensioning and operation of power electronic converters
  • iPES-EMFields - Electrostatic, magnetic fields, permeability, inductor design.
  • iPES-AET - Operational Amplifier - Applications.
Gecko Research

Power Electronics Simulation -Specialized Software to meet demands of Power Electronics Engineers. Gecko-Research is engaged in numerical simulations of circuits, control, 3D-thermal, electromagnetics, reliability issues and system optimization.

Power Designer and WEBENCH

The WEBENCH environment provides the end-to-end design and prototyping tools you need to create power supplies or DC-DC Converters that meet your design requirements.

WEBENCH Power Designer and Architect

Power Designer - Expert Tips and Techniques for Power Supply Design. Examples - Simple Switcher, Power Supply, Voltage References, Lighting, Battery Management, Voltage Regulators, DC-DC Voltage Converters.

Power Designer and WEBENCH

WEBENCH Power Architect lets engineers quickly design and simulate a complete power supply system for any number of supplies and outputs. System designers can optimize the entire power supply system for small footprint, high efficiency, and cost in minutes.
  • Quickly design and simulate your entire power supply system 
  • Easily configure the power supply load requirements for voltage and current
  • Optimize the overall footprint, efficiency, and BOM cost for the entire system 
  • Get the schematic and BOM for the complete power supply system 
  • Perform electrical simulation and thermal simulation

Thursday, April 17, 2008

International Rectifier - Power Semiconductors

International Rectifier Corp. is a manufacturer of power semiconductors like MOSFET, IGBT, diodes and thyristors. They also provide the support devices which are analog and mixed-signal ICs, power systems and specialized components.

International Rectifier - Power Semiconductors
  • Reference Designs
  • High Voltage Gate Drivers
  • IGBTs
  • Integrated Circuits
IRAM Evaluation Kit with the IRMCF341 Motor Controller

IRMCF341 Motor Controller
The IRADK-S10UP60 is an Evaluation kit for the 6A and 10A IRAM Integrated Power Modules in SIP1 packages. These modules are optimized for electronic control of 3- phase motors in a variety of industrial and appliance applications in the 400W to 750W power range.

International Rectifier
101 N Sepulveda Blvd. El Segundo, CA 90245 USA

Updated Aug 2013

Monday, May 07, 2007

Switching Power Supply Design

Switching Power Supply (SMPS) Design- Tutorials, Circuits, Tools

Lazar's power electronics corner, smps switching power supply design, circuits, schematics, pcbs, electrical engineering reference, software, and other free web resources.

SMPS design, Tutorial, PCB design, Generators, Computer PSU, UPS, Magnetics, EE Reference, Inverters, Thermal