Motor control device and control method thereof
AssigneeKabushiki Kaisha Toshiba
InventorsShun TANIGUCHI, Kazuya YASUI, Kazuaki YUUKI, Yosuke NAKAZAWA
Life of this patent
Estimating the term…
Abstract
A rail vehicle comprises: a permanent magnet synchronous motor; an inverter for driving the permanent magnet synchronous motor; and a vehicle speed sensor for detecting the vehicle speed VTcar. The initial rotational speed ωest0 is estimated based on the vehicle speed VTcar; the angular velocity (ωest) is estimated, taking the initial rotational speed (ωest0) as the initial value; the rotational phase angle (θest) is estimated based on the angular velocity (ωest); and the inverter (1) is controlled based on the rotational phase angle (θest).
Claims8
A motor control device comprising:
- a synchronous motor for driving a vehicle;
- a power conversion means for converting power for driving said synchronous motor;
- a rotational speed-related information acquisition means for acquiring rotational speed-related information related to the rotational speed of said synchronous motor, without providing said synchronous motor with a voltage sensor;
- an initial rotational speed calculation means for calculating an initial rotational speed of said synchronous motor based on said rotational speed-related information acquired by said rotational speed-related information acquisition means;
- a rotational speed calculation means for calculating a rotational speed of said synchronous motor, taking as the initial value said initial rotational speed calculated by said initial rotational speed calculation means;
- a rotational phase angle calculation means for calculating a rotational phase angle of said synchronous motor, based on said rotational speed calculated by said rotational speed calculation means;
- and
- a control means for controlling said power conversion means based on said rotational phase angle calculated by said rotational phase angle calculation means.
A motor control device comprising:
- a first synchronous motor for driving a train;
- a power conversion means for converting power for driving said first synchronous motor;
- an initial rotational speed acquisition means for acquiring an initial rotational speed of a second synchronous motor for driving said train;
- a rotational speed calculation means for calculating a rotational speed of said first synchronous motor as an initial value of said initial rotational speed acquired by said initial rotational speed acquisition means;
- a rotational phase angle calculation means for calculating a rotational phase angle of said first synchronous motor, based on said rotational speed calculated by said rotational speed calculation means;
- and
- a control means for controlling said power conversion means, based on said rotational phase angle calculated by said rotational phase angle calculation means.
A motor control method of controlling a power conversion device that performs power conversion for driving a synchronous motor for driving a vehicle, said motor control method comprising:
- acquiring rotational speed-related information related to a rotational speed of said synchronous motor without providing a voltage sensor for said synchronous motor;
- calculating an initial rotational speed of said synchronous motor, based on said rotational speed-related information that has thus been acquired;
- calculating a rotational speed of said synchronous motor using said calculated initial rotational speed as an initial value;
- calculating a rotational phase angle, based on said calculated rotational speed;
- and
- controlling said power conversion device, based on said rotational phase angle that has thus been calculated.
A motor control method of controlling power conversion device that performs power conversion for driving a first synchronous motor, said first synchronous motor and a second synchronous motor being provided in a train for driving a train, comprising:
- acquiring an initial rotational speed of said second synchronous motor;
- calculating a rotational speed of said first synchronous motor using said initial rotational speed that has thus been acquired as an initial value;
- calculating a rotational phase angle of said first synchronous motor, based on said rotational speed that has thus been calculated;
- and
- controlling said power conversion device based on said rotational phase angle that has thus been calculated.
Dependencies are inferred from the claim text.