Electric motor

Details Electric motor Electric motor

2011-01-18

2011-01-18

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400210

Reexamination Certificate

active

07872434

ABSTRACT:
An electronically commutated electric motor (110) has a permanent-magnet rotor (28), a stator having a stator winding arrangement (40), a motor control module (20) implemented as an IC and having a control logic unit (27), and an external power stage (50), separate from the IC, for influencing the current flow in the stator winding arrangement (40). The motor control module (20) has an internal power stage (29) having at least one open collector output (21, 23). The control logic unit (27) is configured to process a rotor position signal (24′, 24″) and to generate therefrom control signals (27′) for the internal power stage (29), which control signals (27′) serve to apply control to the internal power stage (29). Using an external power stage (50) reduces vulnerability to motor overheating and provides design flexibility.

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Anachip Corp., Taiwan:“AH287 High Voltage Hall-Effect Smart Fan Motor Controller,” 7 pp. © 2005.
Texas Instr., Dallas TX, “UC3625 Brushless DC Motor Controller IC,” 11 pp., © 2005.
Prolific Technology, Taiwan, PT3911 Mixed-Mode Hall IC Motor Driver, 3 pp. © 2003.

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