Premium
Torque Maximisation Of The Pmac Motor For High Performance, Low Inertia Operation
Author(s) -
Stewart Paul
Publication year - 2003
Publication title -
asian journal of control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.769
H-Index - 53
eISSN - 1934-6093
pISSN - 1561-8625
DOI - 10.1111/j.1934-6093.2003.tb00097.x
Subject(s) - pmac , inertia , control theory (sociology) , torque , voltage , torque motor , rotor (electric) , engineering , direct torque control , wound rotor motor , computer science , induction motor , physics , control system , electrical engineering , control (management) , classical mechanics , artificial intelligence , thermodynamics
This paper describes the techniques applied to maximise the torque envelope of the permanent magnet AC (PMAC) motor operating under current and voltage constraints. Standard steady‐state descriptions of the system are often suitable for control purposes when the rotor velocity is varying relatively slowly. In low inertia applications such as clutchless gearchange operations, where in the pursuit of driveability, the motor is required to accelerate and decelerate its own rotor inertia as quickly as possible. In this case, the voltage drop due to the current dynamics start to become significant. This paper presents a method to reserve voltage headroom dynamically in the field‐weakening region in order to maximise the torque envelope when the effective inertia is low. Experimental results show the effectiveness of this approach.