| 摘要 |
PURPOSE:To obtain a constant output control of a thyrister motor with a high power factor and efficiency by securing a minimum margin angle of commutation estimating an overlapping angle of commutation and a reaction angle of an armature while maintaining an equivalent voltage between brushes of a DC machine. CONSTITUTION:A current command of main circuit (Id command) is increased with arm additional load with enhances a command of a control advance angle beta0 preset by a beta0 command arithmetric circuit 23 receiving an Id command, magnetic field current If and angular velocity as inputs whereby a margin angle of commutation is always maintained. While, increased load current enhances the reaction of an armature resulting in a lower terminal voltage Ee, the output of an Et command arithmetric circuit 24 with the angular velocity omega and the Id command as inputs is compensated for by an current command with the result that a field current If increases through an Et control circuit 16. A beta0 command is outputted through a Vs command circuit 25 and Vs control circuit 26 so as to keep an equivalent voltage Vs between DC brushes constant, adds to the output of the beta0 command arithmetric circuit 23 and then, is inputted into a load side automatic pulse phase transfer device 12. |
