Fairchild Launches SPM® Products For Driving Two-Phase Switched Reluctance Motors
Fairchild Semiconductor introduced what it describes as an industry innovation in SPM technology with what is claimed to be the industry’s first SRM-SPM power modules for driving two-phase switched reluctance motors (SRM) in small motor applications such as vacuum cleaners.
Switched reluctance motors are said to be an attractive alternative to ac drives due to their high efficiency. The small motor industry is said to be migrating from single-phase to two-phase SRM motors due to their ability to startup under difficult load conditions and the lower components that these motors require.
Each SRM-SPM module – FCAS20DN60BB and FCAS30DN60BB – integrates two HVICs, one LVIC, four NPT IGBTs, four fast recovery diodes (FRDs), two bootstrap diodes, a thermistor and various protection functions in a single package. By integrating 14 fully tested power components in a compact 45 x 28mm SIP package, these products are said to offer 40% space savings. This space conservation is said to allow designers to incorporate the controller into the SRM assembly, and also to improve design productivity and manufacturability. System reliability is further enhanced by incorporating protection features such as under-voltage lock-out and short circuit protection into this thermally efficient package.
"Fairchild continues to provide cutting-edge, efficient solutions that innovate today’s electronics. These SPM power modules for two-phase switched reluctance motors are an example of how Fairchild provides solutions that deliver excellent performance, while minimizing design and manufacturing time," said Taehoon Kim, Vice President of Fairchild’s Functional Power Solutions.
The FCAS20DN60BB and FCAS30DN60BB utilize lead-free (Pb-free) terminals and have been characterized for moisture sensitivity in accordance with the Pb-free reflow requirements of the joint IPC/JEDEC standard J-STD-020.
The units are priced as follows: FCAS20DN60BB – US$ 16.38; FCAS30DN60BB – $17.94. Delivery time is 12 weeks ARO.
