ADJUSTING DEVICE FOR AN ELECTRIC MOTOR

摘要

A device for reversing the direction of rotation and/or for adjusting the carbon brushes for a reversible electric motor, in particular for an electric hand tool, with a base and with a mount, which is mounted pivotably on the base and on which brushholders for the carbon brushes wiping over the collector of the electric motor are arranged. The electric motor can be driven by means of power electronics, such as a pulse width controller, a phase gating controller, a phase chopping controller or the like. The power electronics are arranged on the base and/or on the mount. The device furthermore has fixed contacts and switching contacts, which interact with alternate contact-making for reversing the direction of rotation of the electric motor as the mount is pivoted.

主权项

1. A device for reversing the direction of rotation and/or for adjusting the carbon brushes for a reversible electric motor for an electric hand tool, with a base, with a mount mounted pivotably on the base, switching contacts for reversing the direction of rotation of the electric motor and/or brushholders for the carbon brushes wiping over the collector of the electric motor being arranged, and the electric motor being driven by means of power electronics selected from a pulse width controller, a phase gating controller and a phase chopping controller, wherein the entire power electronics are arranged on the base and/or on the mount, and wherein signal processing electronics having current sensors and/or sensors for sensing a rotor position of the electric motor are arranged on the base and/or on the mount.