Motor control apparatus

Details Motor control apparatus Motor control apparatus

2011-05-31

2011-05-31

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

C318S432000, C318S560000

Reexamination Certificate

active

07952313

ABSTRACT:
A motor control apparatus includes: an electric motor having an outer rotor and an inner rotor which can alter mutual relative phases; a phase alternation device which alters the relative phase; a phase position sensor which detects a phase position with respect to the relative phase; and a fail-decision control unit which sets the relative phase as a maximum value or a minimum value (that is, a most forcing phase and a most weakening phase) in a phase variable area of the phase alternation device in accordance with a rotation number of the electric motor when the phase position sensor does not work.

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