An inductive power transfer system for transferring electric energy to a vehicle, wherein the system comprises - a wayside electric conductor arrangement for producing an alternating electromagnetic field and for thereby transferring the energy to the vehicle, - a vehicle side receiving device for receiving the alternating electromagnetic field and for producing electric energy by magnetic induction, wherein - the wayside electric conductor arrangement is combined with an array of a plurality of sensor coils of the system, the sensor coils being placed side by side to form the array, wherein the array of the plurality of sensor coils is placed in between the wayside conductor arrangement and the vehicle side receiving device, - the array extends in directions transverse to a field direction of the electromagnetic field, which field direction extends from the wayside electric conductor arrangement to the vehicle side receiving device during transfer of the energy to the vehicle, - a detector arrangement is connected to the plurality of the sensor coils, the detector arrangement being adapted to detect an effect of any magnetic and/or electrically conducting body (3, 6), that is possibly located in the field direction, on at least one electrical property of at least one of the sensor coils, - the vehicle side receiving device is combined with a communication transmitter of the system adapted to transmit communication signals to the array of the plurality of sensor coils, wherein the detector arrangement and/or a communication receiver, that is connected to the plurality of the sensor coils, is/are adapted to receive the communication signals via at least one of the of the plurality of sensor coils, - and the system is adapted to use a communication signal received via at least one of the of the plurality of sensor coils to detect a position of the vehicle side receiving device. - a wayside electric conductor arrangement for producing an alternating electromagnetic field and for thereby transferring the energy to the vehicle, - a vehicle side receiving device for receiving the alternating electromagnetic field and for producing electric energy by magnetic induction, - the wayside electric conductor arrangement is combined with an array of a plurality of sensor coils of the system, the sensor coils being placed side by side to form the array, wherein the array of the plurality of sensor coils is placed in between the wayside conductor arrangement and the vehicle side receiving device, - the array extends in directions transverse to a field direction of the electromagnetic field, which field direction extends from the wayside electric conductor arrangement to the vehicle side receiving device during transfer of the energy to the vehicle, - a detector arrangement is connected to the plurality of the sensor coils, the detector arrangement being adapted to detect an effect of any magnetic and/or electrically conducting body (3, 6), that is possibly located in the field direction, on at least one electrical property of at least one of the sensor coils, - the vehicle side receiving device is combined with a communication transmitter of the system adapted to transmit communication signals to the array of the plurality of sensor coils, wherein the detector arrangement and/or a communication receiver, that is connected to the plurality of the sensor coils, is/are adapted to receive the communication signals via at least one of the of the plurality of sensor coils, - and the system is adapted to use a communication signal received via at least one of the of the plurality of sensor coils to detect a position of the vehicle side receiving device.