Abstract: An internal stator of a rotary field machine has a number of N stator teeth. Two stator teeth each form a number of N/2 tooth groups, wherein one tooth group each is formed by two directly adjacently arranged stator teeth has a pole core and a pole shoe formed thereon, and thus, the inner stator comprises semi-closed grooves. The pole cores are made of a first material, for example, silicon iron. In addition thereto, an intermediate element extending in the axial direction of the stator is arranged between each of two stator teeth of two adjacent tooth groups, which is made of a different material. The second material of the intermediate element is different from the first material of the stator teeth.

Abstract: A stator of an external rotor motor supports a plurality of excitation windings. At least one heat dissipation means is provided, for discharging heat in an axial direction. The heat dissipation means contacts the end face of at least one excitation winding or a potting compound or insulation enclosing the excitation winding and is also connected to a heat sink, in the form of the stator carrier, a cooling element and/or a housing, for removing the heat.

Abstract: A stator of an external rotor motor supports a plurality of excitation windings. At least one heat dissipation means is provided, for discharging heat in an axial direction. The heat dissipation means contacts the end face of at least one excitation winding or a potting compound or insulation enclosing the excitation winding and is also connected to a heat sink, in the form of the stator carrier, a cooling element and/or a housing, for removing the heat.

Abstract: A method for opening and/or using at least one vehicle may include receiving, by a mobile terminal, an identifier assigned to a target vehicle. The identifier may be transmitted to a server, and a key data set may be received from the server. The key data set and/or a code based on the key data set may be transmitted as a remote code to the target vehicle. The target vehicle may generate at least one local code after receiving the remote code, and may compare the remote code to the local code(s). The target vehicle may be opened and/or released, or a vehicle command may be executed if at least one of the local codes corresponds to the remote code.