Abstract
A method is described for regulating phase currents in a brushless electronically commutated motor (ECM) without the use of any discrete current sensors such as shunts or current transformers. Current feedback information is provided by current sensors integrated into MOS-gated power switches (i.e. MOSFETs and IGFETs), and the current regulation is performed by smart-power gate drive integrated circuits. The scheme provides protection against dangerous fault currents not sensed by conventional bus-shunt configurations. Available power devices and smart-power components make this technique applicable to ECM drives operating at bus supply voltages up to 500 V DC with power ratings from fractional to >10 hp. >
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
