| 摘要 |
The invention relates to a compressor (400') for generating compressed air, in particular for a compressed air supply system (1000) of a vehicle, comprising the following: - an electric motor (500) in the form of a brushed DC electric motor (BDC electric motor), and - a compressor which can be driven by the electric motor (500), wherein - the electric motor (500) is paired with a controller (900, 900') for controlling the electric motor (500) in order to limit an operating current (IB) of the electric motor (500). According to the invention, - the controller (900, 900') is paired with an electric current-limiting element (902), in particular in a freewheeling path, said current-limiting element being designed to variably limit the operating current (IB), and - the controller (900, 900') is paired with a switching control (901) which is designed to variably specify an activation duration (t_ON) and/or a deactivation duration (t_OFF) for the electric motor (500). The method allows a power-optimized sizing design of the components (FET and diode D) in the freewheeling path (902) with respect to a reduction of the component costs and size. |
