Abstract: 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.

Abstract: 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.

Abstract: In a driving control method for a synchronous reluctance motor, a novel vector control method is employed which does not need the salient pole position angle detector. More particularly, the present invention provides a vector control method which can accurately and efficiently estimate cosine and sine signals, being rotation signals for the vector rotators. A flux vector estimator 12a uses voltage and current information of a stator to estimate a stator flux vector by dividing it into an in-phase flux vector having the same direction as a current vector and a mirror-phase flux vector determined as a difference between the stator flux vector and the in-phase flux vector. A cosine and sine generator 12b uses the estimated in-phase and mirror-phase flux vectors to generate the cosine and sine values of an intermediate angle of the angles of such flux vectors and outputs a rotation signal of the vector rotators. Thus, vector control is established.

Abstract: In a driving control method for a synchronous reluctance motor, a novel vector control method is employed which does not need the salient pole position angle detector. More particularly, the present invention provides a vector control method which can accurately and efficiently estimate cosine and sine signals, being rotation signals for the vector rotators.

Abstract: 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.

Abstract: 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.