Title: Supersapce vector speed governing method for brushless direct-current machine direct torque control
Application Number: 200610096849 Application Date: 2006.10.20
Publication Number: 1937398 Publication Date: 2007.03.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02P21/00
Applicant(s) Name: Nanjing Aeronautic Address:
Inventor(s) Name:
Attorney & Agent: jueru sheng
Abstract:
    This means puts the voltage of the shut phase on the Z-axis of quadrature coordinate system of 3D space, while puts the voltage of the open phase on the abc plane. In every sampling period, the projective value and instant rotary moment of projection magnetic chain on a, b and c axes are calculated according to the value of current and voltage tested. Compare the projective value with the giving value, the instant rotary moment with the giving moment. A voltage vector is selected according to the result of comparison to act on brush-free DC motor with the aid of the power converter. This invention has solved two difficult problems, the voltage comprehensive vector calculating and the stator magnetic chain comprehensive vector calculating. It simplifies the system, needs no rotor position signal and possesses fast dynamic response. It well meets the requirement of military industry and civil consume.
Time: 5