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OwnerSatoru Kaneko, Ryoso Masaki +3inventors
InventorsSatoru Kaneko, Ryoso Masaki, Yuusuke Takamoto, Taizou Miyazaki, Sanshiro Obara
Estimating the term…
A power corresponding to an A/C voltage command id1* is applied in the d-axis direction of rotational coordinates of a stopped synchronous motor via a current control unit, a three-phase converting unit, and a power converter. Further, by using “an amplitude value of a current iq′ in the q-axis direction of the rotational coordinates generated in response to the A/C voltage command id1*” which is fed back and detected via a current detector and a dq converting unit, a field pole position estimation value θ{circumflex over ( )} is converged. The field pole position is estimated by using the converged field pole position estimation value θ{circumflex over ( )} as a true value of the field pole position θ of the synchronous motor.
A method of estimating a field pole position of a synchronous motor for applying an alternating current signal to the current command value in the d-axis direction of rotational coordinates of a synchronous motor, and executing a converging calculation of a field pole position estimation value of the synchronous motor from a current signal in the q-axis direction of the rotational coordinates generated by the application of the alternating current signal, thereby estimating the field pole position of the asynchronous motor, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
A motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
An electric vehicle comprising a battery and a motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
An electric vehicle comprising a current converter and a motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
An electric vehicle comprising a synchronous motor and a motor controller for controlling the synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis, component of motor current.
Dependencies are inferred from the claim text.