Patent ID: 6300735
Filing Date: 2001-10-09
Classification: B60K,B60L,B60W,F16H,Y02T,Y10S,Y10T

Abstract:
A control for an electromechanical transmission including a planetary gearing mechanism including an input member adapted for connection to an engine, a member connected to a first electric machine operable as a motor or a generator, a member connected to a second electric machine operable as a motor or a generator, and an output member, the first and second electric machines and the members connected thereto being respectively rotatable for controlling a torque acting on the output member, the control comprising:a first controller for controlling the rotation of the first electric machine and a second controller for controlling the rotation of the second electric machine, the first and second controllers being connected in electrical communication by a conductive link and controllable by first and second torque command signals, respectively;sensors for sensing rotational speeds of the first and second electric machines, respectively; anda transmission controller operable for generating and outputting the first and second torque command signals to the first and second controllers corresponding to a desired torque value for the output member, by determining first and second torque values for the first and second torque command signals, respectively, without exceeding predetermined torque limits for the electric machines and while maintaining an electrical parameter of the conductive link within a desired range.