Electronic device for controlling a synchronous motor with...

Details Electronic device for controlling a synchronous motor with... Electronic device for controlling a synchronous motor with...

2005-04-26

2005-04-26

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S430000, C318S721000

Reexamination Certificate

active

06885161

ABSTRACT:
Electronic device for controlling a synchronous motor with permanent-magnet rotor, comprising an alternating voltage current source at mains frequency connected in series with said synchronous motor (1), at least one static switch (2) connected in series with said synchronous motor (1), and an electronic circuit (3) that acts on said static switch (2). Said electronic circuit (3) determines the timing for the firing of the static switch (2) taking as reference the zero-crossing of the mains voltage (Vr) and applying a firing time (Td) starting from said reference, said firing time (Td) being obtained as a function of the position of the rotor (1A) of the motor (1) in the previous half-cycles.

REFERENCES:
patent: 3529220 (1970-09-01), Kobayashi et al.
patent: 4769581 (1988-09-01), Rilly
patent: 4780652 (1988-10-01), Rilly
patent: 5675226 (1997-10-01), Riola'
patent: 6081092 (2000-06-01), Alvaro et al.
patent: 6225775 (2001-05-01), Alvaro et al.
patent: 6239563 (2001-05-01), Kunz

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