Patent ID: 9184803
Filing Date: 2015-11-10
Classification: B23Q,H01F,H02J,H04B

Abstract:
1. A rotary transmitter for machine tools, having an inductive transmission section for electrical power, having a stator part, which is fixed to a machine, and a rotor part, which is fixed to a tool and can rotate about a rotation axis, wherein the stator part has a primary winding, which is arranged in a primary circuit, and the rotor part has a secondary winding, which is arranged in a secondary circuit and is separated from the primary winding by means of an air gap, characterized in that an inverter is arranged in the primary circuit, a DC input of said inverter being connected to a DC source, an AC output of said inverter being connected to a primary resonant circuit which contains the primary winding, and it being possible to vary and adjust an operating frequency of said inverter by means of a control assembly, in that a rectifier is arranged in the secondary circuit, a secondary resonant circuit which contains the secondary winding being connected to an AC input of said rectifier, and a DC output of said rectifier being in a form of a load connection, in that the secondary circuit comprises a test resistor which can be selectively connected and bridges the load connection, in that an ammeter is arranged in the primary circuit at the DC input of the inverter, and in that the control assembly has a programmable actuating output, which is connected to a frequency input of the inverter, and a measurement input which is connected to or communicates with the ammeter.