A system for supplying energy to a medical device implanted in a mammal patient, the system comprising: a first coil that, when implanted in the patient's body, receives wireless energy for supplying energy or control signals to the medical device, when implanted in the patient's body, the first coil having a first diameter, the first coil being wound from wire formed into a plurality of third coils connected to one another to form a helically-shaped wire, and a second coil external to the patient's body that transmits the wireless energy to the first coil, when implanted in the patient's body, a first control unit that, when implanted in the patient's body, is connected to the first coil so as to receive energy or control signals from the first coil or to provide information signals to the first coil for transmission to the second coil, a second control unit that is located outside of the patient's body and connected to the second coil and that generates energy or control signals for transmission to the first coil or receives information signals transmitted from the first coil, wherein an alternating signal generated by the second control unit is an alternating current that flows through the second coil, and wherein the wireless energy received by the first coil is an alternating magnetic field, which is created by the alternating current flowing in the second coil, and which induces an alternating voltage in the first coil, characterized in that the first coil being made of a plurality of larger windings wound around a longitudinal axis, wherein each large winding is being made of a plurality of third coils connected in series or in parallel and perpendicular to said longitudinal axis, each third coil having a diameter smaller than the first diameter. a first coil that, when implanted in the patient's body, receives wireless energy for supplying energy or control signals to the medical device, when implanted in the patient's body, the first coil having a first diameter, the first coil being wound from wire formed into a plurality of third coils connected to one another to form a helically-shaped wire, and a second coil external to the patient's body that transmits the wireless energy to the first coil, when implanted in the patient's body, a first control unit that, when implanted in the patient's body, is connected to the first coil so as to receive energy or control signals from the first coil or to provide information signals to the first coil for transmission to the second coil, a second control unit that is located outside of the patient's body and connected to the second coil and that generates energy or control signals for transmission to the first coil or receives information signals transmitted from the first coil, wherein an alternating signal generated by the second control unit is an alternating current that flows through the second coil, and wherein the wireless energy received by the first coil is an alternating magnetic field, which is created by the alternating current flowing in the second coil, and which induces an alternating voltage in the first coil, characterized in that the first coil being made of a plurality of larger windings wound around a longitudinal axis, wherein each large winding is being made of a plurality of third coils connected in series or in parallel and perpendicular to said longitudinal axis, each third coil having a diameter smaller than the first diameter.