DRIVING DEVICE FOR AN ELECTRIC MOTOR

摘要

The invention relates to a device (1) for driving an electric motor (2), particularly a DC motor in a battery-operated electric tool. Said driving device (1) comprises a power circuit (3) encompassing at least one power semiconductor (4, 5), especially for controllably applying a voltage to the electric motor (2). The driving device (1) further comprises a control circuit (6) for controlling the power semiconductor (4, 5) in such a way that the electric motor (2) can be operated at an adjustable rotational speed, an adjustable torque, or the like. The driving device (1) also comprises a switching module (8) for turning on and/or off the electric motor (2). The switching module (8) is fitted with an actuator (7) that can be moved from a starting position. The power circuit (3) has a branch (9, 10) comprising a power semiconductor (4, 5) for clockwise and counterclockwise rotation of the electric motor (2). An electric switch (11), particularly in the form of a two-way contact, is disposed in the power circuit (3) in order to adjust the respective branch (9, 10).