Canon Kabushiki Kaisha

Nidec Corporation

Shinji Shinnaka

Masahiro Morisada

Mikio Sato

A rotor phase/speed estimating device includes a high-frequency voltage injection unit, a high-frequency current amplitude detection unit of a fundamental wave component, a correlation signal generation unit, and a rotor phase generation unit. The high-frequency voltage injection unit applies a high-frequency voltage to an AC motor. The high-frequency current amplitude detection unit of a fundamental wave component detects a primary Fourier coefficient equivalent value. The correlation signal generation unit is arranged to generate a correlation signal using the Fourier coefficient equivalent value. The rotor phase generation unit is arranged to generate an estimated value of the rotor phase and an estimated value of a rotor speed using the correlation signal.

Rotor phase/speed estimating device for an AC motor

In an adaptive apparatus for adaptively adjusting parameters in a system, the parameters of the system are adjusted in accordance with an integral relationship. At that moment, one or both of a scalar and a matrix which depend on time are used as gains. Furthermore, adjustment in accordance with a proportional relationship is used together. Also in this adjustment, one or both of a scalar and a matrix which depend on time are used as gains.

Adaptive apparatus

An adaptive apparatus for adjusting a system parameter in an adaptive manner, wherein the parameter in the form of a vector is successively adjusted by using a vector error signal, a first adaptive gain signal in the form of a matrix corresponding to the vector error signal, a matrix signal and a second adaptive gain in the form of a matrix corresponding to the matrix signal.

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Yokohama, Japan

Shinji Shinnaka