Title :
Integrated current regulation for a brushless ECM drive
Author :
Jahns, T.M. ; Becerra, R.C. ; Ehsani, M.
Author_Institution :
GE Corp., Schenectady, NY, USA
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
Keywords :
commutation; electric current control; electric drives; electric motors; insulated gate field effect transistors; machine control; power transistors; semiconductor switches; small electric machines; 500 V; IGFETs; MOSFETs; brushless ECM drive; bus supply voltages; current regulation; current sensors; electronically commutated motor; fault currents; feedback; machine control; power ratings; power transistors; protection; smart-power gate drive integrated circuits; Brushless DC motors; Current control; Current transformers; Electrochemical machining; Fault currents; Feedback; MOSFETs; Protection; Sensor phenomena and characterization; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1989. APEC' 89. Conference Proceedings 1989., Fourth Annual IEEE
Conference_Location :
Baltimore, MD
DOI :
10.1109/APEC.1989.36955
