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Patent Searching and Data


Title:
BRAKING DEVICE FOR A UNIVERSAL MOTOR
Document Type and Number:
WIPO Patent Application WO/2011/076827
Kind Code:
A3
Abstract:
The invention relates to an electrodynamic braking device for a universal motor, wherein a field winding is fed from a grid during a braking operation, and an armature is directly short-circuited, and a braking process is performed by means of control electronics, whereby good braking is achieved with relatively low brush wear. Such an electrodynamic braking device can be used effectively for a power tool equipped with a hazardous tool.

Inventors:
ROTTMERHUSEN, Hans, Hermann (Grashofweg 34, Tellingstedt, 25782, DE)
Application Number:
EP2010/070457
Publication Date:
August 16, 2012
Filing Date:
December 22, 2010
Export Citation:
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Assignee:
ROBERT BOSCH GMBH (Postfach 30 02 20, Stuttgart, 70442, DE)
ROTTMERHUSEN, Hans, Hermann (Grashofweg 34, Tellingstedt, 25782, DE)
International Classes:
H02P3/22; H02M5/293; H02P25/10; H02P25/14
Foreign References:
EP1385261A22004-01-28
US3764822A1973-10-09
DE19932742C12000-09-21
Attorney, Agent or Firm:
ROBERT BOSCH GMBH (Postfach 30 02 20, Stuttgart, 70442, DE)
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