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Interference cancellation system, electric drive device and electric hand-held tool machine

A hand-held machine tool and interference system technology, which is applied in the field of electric hand-held machine tools, can solve the problems of expensive anti-interference system and increased consumption of the anti-interference system, and achieve the effect of strong interference suppression

Inactive Publication Date: 2019-01-25
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the required outlay for a suitable interference suppression system increases with increasing accumulator or battery voltage
State-of-the-art, especially battery-operated, electric hand-held power tools based on 36-volt batteries currently contain expensive interference suppression systems

Method used

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  • Interference cancellation system, electric drive device and electric hand-held tool machine
  • Interference cancellation system, electric drive device and electric hand-held tool machine
  • Interference cancellation system, electric drive device and electric hand-held tool machine

Examples

Experimental program
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Embodiment Construction

[0036] figure 1 A schematic illustration of an exemplary electric hand-held power tool 10 in the form of an electric drill 10 ′ is shown. Other electric hand-held power tools 10 are conceivable, such as hammer drills, hedge trimmers, lawn trimmers, free-wheel cutters, saws, in particular chain saws, circular saws, or the like. In the exemplary embodiment shown, the electric hand-held power tool 10 can be mechanically and electrically connected to a battery 12 for being supplied with electrical current independently of the grid. The accumulator 12 is provided for supplying electrical energy with a DC voltage. The electric hand-held power tool 10 has a machine housing 14 , a tool holder 16 and an electric drive 18 . The electric hand tool machine 10 also has a control unit 20 , a brushed DC motor 22 , a first connecting line 24 , a second connecting line 26 , and interference suppression systems 28 , 28 a , 28 b.

[0037] The brushed DC motor 22 has a rotor and a stator (not ...

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Abstract

An interference cancellation system (28, 28a, 28b, 28c) for an electric drive device (18) is provided. The interference cancellation system (28, 28a, 28b, 28c) has a ferrite core (36a, 36b, 36c), theferrite core has a first elongated hole through opening (38a, 38b, 38c) and a second elongated hole through opening (40a, 40b, 40c), wherein the first elongated hole through opening (38a, 38b, 38c) isprovided for receiving at least two line segments (42a, 42b, 42c) of a first connection line (24) of the electric drive device (18), and the second elongated hole through opening (40a, 40b, 40c) is provided for receiving at least two line segments (44a, 44b, 44c) of a second connection line (26) of the electric drive device (18).

Description

technical field [0001] The invention relates to an interference suppression system, an electric drive and an electric hand-held power tool. Background technique [0002] An electric hand-held power tool is already known, such as a hammer drill, which has an electric drive, a control unit, a power supply and a tool receiver, wherein the electric drive has a brushed or brushless electric motor, in particular Brushed DC motor. The electric motor typically drives a mechanical device, for example a tool receiver of an electric hand-held power tool. The controller of the electric hand-held power tool is used to control the electric motor and, for this purpose, to supply the electric motor with electrical energy from a current grid or from a grid-independent power supply, for example from a storage battery. [0003] In particular, battery-operated electric hand-held power tools with brushed direct current motors (DC motors) typically emit strong electromagnetic fields which are c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F17/04
CPCH01F17/04H01F17/043H01F17/06H01F2017/065
Inventor D·克鲁佩热维奇J·海茨曼
Owner ROBERT BOSCH GMBH
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