Space-Saving SRM-SPM Power Modules Drive Two-Phase Switched Reluctance Motors
Fairchild Semiconductor introduced what is said to be the first SRM-SPM power modules for driving two-phase switched reluctance motors (SRM) in small motor applications. Switched reluctance motors are an alternative to AC drives due to their high efficiency. The small motor industry is 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 45 mm × 28 mm SIP package, these products are said to offer a 40 percent space savings. System reliability is enhanced by incorporating protection features such as under-voltage lock-out and short circuit protection into the package.