IGBTs for induction heating
21 February 2007
Power Electronics / Power Management
G. Introvaia, product marketing IGBTs, STMicroelectronics
Thanks to their high efficiency, flameless safe operation and quick reaction time, induction heating (IH) cookers are gaining in popularity. To control the operation of a resonant inverter, STMicroelectronics has introduced a new series of rugged IGBTs with optimal switching and conduction performance, for induction heating cookers, microwave ovens and rice jars.
Figure 1. High performance IGBTs for 600 and 1200 V induction heating applications
STGW30NC120HD
The STGW30NC120HD device housed in TO-247 exhibits switching speeds optimised for IH applications in single switch topology. In an IH cooker, the power switch controls the current provided to the heating coil, generating a high frequency magnetic field around the coil according to Ampere's law. The magnetic field induces an eddy current on the close surface of a conductive object, such as a cooking pot, as a result, the Joule effect warms the pot (Figure 2).
Figure 2. Single switch quasi-resonant topology
The well established PowerMESH technology of ST's IGBTs improves the static losses as the temperature rises and a co-packaged freewheeling diode simplifies circuit design and reduces component count.
Key features include: excellent trade-off between conduction and switching losses; immune to cross-conduction phenomena; small electrical parameter spread; low input capacitance (easier driving); minimal gate charge; optimised companion co-packaged free-wheeling diode.
The STGW30NC120HD was bench- marked against a well-known comparable product in an 1800 W induction cooker (TCL TC18A). Results showed that the performance of ST's 1200 V IGBT is almost aligned with best-in-class competition in terms of case temperature.
Figure 3. Single-plate IC reference design board
HB configuration in multipot systems
In a half bridge topology, as often used in multipot systems, the 600 V Very Fast series is suitable for medium frequency cookers, while a new trend to double the standard working frequency requires a faster device, such as the new Ultra Fast series.
Further reading:
NVDC power-path control to 1– 6 cell battery systems
iCorp Technologies
Power Electronics / Power Management
SG Micro’s SGM41581 is an I2C-controlled narrow voltage direct charging buck boost charge controller designed to simplify robust power delivery in systems that must seamlessly operate from an adapter input or a battery pack.
Read more...
Precise, adaptive battery health-monitoring
RS South Africa
Power Electronics / Power Management
New fuel gauge solution from Nordic delivers State-of-Health reporting, adaptive battery modelling, and seamless fleet observability via nRF Cloud.
Read more...
Compact 6 A automotive buck converter
Altron Arrow
Power Electronics / Power Management
Delivering up to 6 A of continuous output current, the DCP0606Y from STMicroelectronics enables efficient regulation of low-voltage rails commonly used in modern vehicle electronics and industrial systems.
Read more...
The new role of UPS technology in high-precision automation
Omron Electronics
Power Electronics / Power Management
OMRON’s BU_2SW and BU_2RWL series UPS systems are engineered to offer a robust, online type power architecture designed to safeguard sensitive AC powered systems across a wide range of industries.
Read more...
Rugged railway-grade DC-DC power modules
iCorp Technologies
Power Electronics / Power Management
iCorp Technologies has introduced the AIPUPOWER ZCD100 and ZCD150 Series, a family of rugged DC-DC converters designed to meet the demanding electrical and environmental requirements of railway and transportation systems.
Read more...
Four-quadrant regenerative grid simulator
Conical Technologies
Power Electronics / Power Management
The IT7900EP series high-performance regenerative grid simulator from ITECH is a full four-quadrant AC grid simulator capable of both sourcing and sinking power.
Read more...
90 W PSU with 150% boost capability
Brabek
Power Electronics / Power Management
RECOM’s cost effective REFIN2U-S90/CL DIN rail AC/DC boasts a 90 W rating with a boost capability of 150% for 4,5 seconds to allow for surge loads.
Read more...
Standalone USB PD controller
Future Electronics
Power Electronics / Power Management
The STUSB4531 from STMicroelectronics is a standalone USB Power Delivery sink controller designed to streamline the implementation of USB-C power negotiation in sink devices without requiring a full software stack on a host microcontroller.
Read more...
Power module enhances AI data centre power density
Altron Arrow
Power Electronics / Power Management
Microchip’s MCPF1525 power module with PMBus delivers 25 A DC-DC power and is stackable up to 200 A.
Read more...
MIL-Spec DC-DC power converters
Vepac Electronics
Power Electronics / Power Management
PowerGood has introduced a range of 15 W to 600 W military DC-DC power converters engineered for mission critical defence applications.
Read more...
printer friendly version