Method for operating an electric motor of a medical instrument

Abstract

The invention relates to a method for operating an electric motor of a medical instrument. The method involves operating an electric motor (2) of a medical instrument (1), especially a dental surgical instrument or a dental pulp disease therapeutic instrument with a mechanism having a tool (5) driven by the electric motor (2). In the calibration step, the electric motor (2) and the tool (5) are enabled to operate in at least one operating point, the generator voltage (UEMK), the speed (n electric motor) and the open-circuit current (I electric motor) of the electric motor (2) are detected based on the operating point. A load friction torque (Mreib) for the medical instrument (1), which is taken into account as a correction factor in the driving of the motor (2) during the subsequent operation of the medical instrument (1), is calculated based on the determined parameters. An independent claim is included for a dental system.

Description

technical field [0001] The invention relates to a method for operating an electric motor of a medical device having means for receiving a tool driven by said electric motor. Medical devices are in particular dental surgical devices or so-called endodontic devices. The invention also relates to a dental device with a corresponding instrument. Background technique [0002] Dental instruments generally differ in the type of drive used in the instrument. Although instruments with turbine drives were mainly used earlier, instruments with electric drives are also increasingly being used, since in such drives the rotational speeds required for the corresponding treatment in dental practice can also be achieved at the same time. An advantage of a dental instrument with an electric drive is also that the rotational speed and the torque can be precisely adjusted by correspondingly controlling the electric motor. [0003] Especially for dental instruments used in implant surgery, it...

AI Technical Summary

Problems solved by technology

However, it has proven to be disadvantageous that this involves additional manually performed work steps which always take some time

In addition, it is obviously problematic that the adjustment cannot be carried out with the instrument used for subsequent treatment, because the adjustment system is usually not sterile or sterile and accordingly during the adjustment process the instrument and Loss of sterility of electric motors (but especially tools)

That is to say, in the adjustment systems used up to now, which are generally independent devices, there is always finally a certain insecurity in terms of the torque actually applied subsequently

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