| 摘要 |
An electric motor arrangement comprising an electric motor and a controller, wherein the electric motor includes a stator having a plurality of coil windings, and a rotor having a plurality of permanent magnets, and the controller is arranged to control current flow through the plurality of coil windings that result from rotation of the permanent magnets relative to the coil windings, wherein the current is defined by a stator current vector represented in a two co-ordinate time invariant system having a rotating quadrature and direct axis by a quadrature current component and a direct current component, wherein the controller is arranged to vary the quadrature current component and the direct current component so that the input electrical power of the electric motor is greater than or equal to zero. |
