Patent Document ID: 20160355103
Application ID: 15243061
Patent Flag: 0

Claim One:
1. An electric vehicle motor controller, comprising: a processor; and a storage device including an operational model stored thereon, the operational model including a plurality of operation positions and an optimal operation region of an electric motor, each operation position corresponding to a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor; wherein the processor is configured to: detect a current speed parameter and a current torque parameter of the electric motor; determine a current operation position of the electric motor in the operational model based on the current speed parameter and the current torque parameter; determine a target speed parameter and a target torque parameter corresponding to a target operation position of the electric motor in the operational model; calculate power requirements for two transition paths connecting the current operation position and the target operation position in the operational model, the two transition paths including a first path consisting of one vector, and a second path consisting of two vectors; and select one of the two transition paths for controlling the electric motor based at least in part on the calculated power requirements.