Abstract: An electric hand-held power tool, having a brushless DC motor and a control unit for field-oriented control of the DC motor on the basis of a current request signal and a target voltage value derived from the current request signal, wherein the hand-held power tool is further designed to provide a system voltage to supply the DC motor, wherein the control unit is set up to adjust the current request signal taking into account a voltage difference between the system voltage and the target voltage value.

Abstract: A power tool having a motor is provided, wherein the motor includes a rotor and a stator, and wherein the stator includes a first winding and a second winding, wherein the windings are designed in such a way that the windings allow operation of the motor of the power tool at substantially full speed, but at substantially half the power compared with the comparison motor. In the comparison motor, the stator coils are substantially completely wrapped with a continuous wire layer. method for operating such a power tool and a method for carrying out charge equalization between two accumulators in a power tool is also provided. The double-wound stator can be used in conjunction with a bridge circuit made up of motor inverters and stator coils to allow charge equalization between two accumulators in a power tool.

Abstract: An apparatus (1) consists of an AC motor (2), a controller (5) and a power driver (6). In this case, the controller (5) and the power driver (6) are supplied with electric power firstly by an operating voltage (9) and secondly by a generator voltage (10) from the AC motor (2). When the operating voltage (9) is absent but the generator voltage (10) is present, the magnetization of the AC motor (2) is influenced such that the generator voltage (10) is kept between two limit values in order firstly to generate sufficient power for the operation of the controller (5) and of the power driver (6) and secondly to observe permitted voltage limits for the power driver (6).