Category | 2013

IGBT Modules Benefit from Inverted Acoustic Inspection

Posted on 29 November 2013

      When a high-current IGBT module experiences sudden electrical failure in service, the consequences are generally expensive and sometimes dangerous. Because they are used as high-speed switches for heavy power and current, IGBT modules play demanding roles in transportation (electric railways, electric autos), mining and other industries. By Tom Adams, consultant, Sonoscan, Inc. [...]

SiC at its Best…! or Customer Specific SiC Modules

Posted on 27 November 2013

      While the speed of development for power electronics is increasing and possibilities of technology are exponentiating, today developers have various choice of which device to choose. The following article intends to get an overview for the various technologies and innovations in packaging technologies for customer specific SiC power modules. By C. Rocneanu, [...]

Strong Competence in Materials Enables more Efficiency

Posted on 27 November 2013

      Small, smaller, smallest - that's the main message TDK Technologies has. The company is convinced that it has achieved another milestone regarding the on-going miniaturisation. In addition to the ultra-flattest multilayer varistors for ESD protection, TDK claims to have the world's smallest common-mode choke for automotive Ethernet and the smallest automotive-grade MLCCs [...]

The Revolutionary New Impedance Analyzer

Posted on 26 November 2013

      Originally conceived as a time domain analysis device the HIL is now entering the frequency domain which will revolutionize the way power electronics controllers are developed, tuned and tested. By Elaina Chai Massachusetts Institute of Technology and Adrien Genic Typhoon HIL Inc. Introduction As the applications and complexity of power electronics systems [...]

Optimising Water, Oil and Fuel Pumps with ANL2 Power MOSFET Technology

Posted on 25 November 2013

      Electric motors are increasingly being used in today's cars to pump water, oil and fuel. The most efficient solution is brushless direct current (BLDC) motors combined with high-performance power MOSFETs. By Abdullah Cam, Senior Engineer, Analog & Power Marketing, Automotive Business Group, Renesas Electronics Europe The block diagram in Figure 1 shows [...]

Using Optical Isolation Amplifiers in Power Inverters for Voltage, Current and Temperature Sensing

Posted on 25 November 2013

      Many industrial equipments and home appliances employ power inverters to perform their designed functions. In the inverter operating control loop, key feedback information on current, bus current and voltage are required to achieve smooth control. To protect the key devices in the inverter such as the IGBTs, temperature sensing is often required [...]

A Simple, Low-cost Technique for Compensating Isolated Converters

Posted on 25 November 2013

      The majority of flyback regulators today are controlled by IC´s with ever increasing integration of functions. Where the classic UCC regulators from Unitrode/TI expected the user to decide on voltage mode or current mode control, generate their own PWM ramps, compensating ramps (where appropriate) and current limit circuitry, the modern controller or [...]

Short-Circuit Detection is Possible for Power Drive Systems with Long Motor Cables

Posted on 06 November 2013

      Long motor cables add high parasitic inductive and capacitive loads to the system. These parasitics lead to reflections on the collector-emitter voltage and the collector current, which have a considerable duration due to the length of the cable. By Marc Buschkühle and Christian R. Müller, Infineon Technologies AG and Benno Weis, Siemens [...]

Miniaturisation of High Voltage, High Capacitance Multilayer Ceramic Capacitors

Posted on 06 November 2013

      There is a constant battle to reduce size and weight of electronic components. Moore’s law supposes that for computing hardware the number of transistors on an integrated circuit doubles every 2 years. Assuming that available space for these components does not increase - in fact it is generally desirable that this space [...]

Quality Improvement of Reverse Recovery Characteristics

Posted on 06 November 2013

      Measurement of High Voltage Thyristors for Series Connection Application Nowadays high voltage thyristor stacks based on series connected assemblies are widely used in soft starters for high power motors and high voltage controlled rectifiers in industrial applications and transportation, in HVDC line converter units for the electric power industry. Thyristors in such [...]