Invention Grant
- Patent Title: Electrodynamic braking device for a universal motor
- Patent Title (中): 通用电机电动制动装置
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Application No.: US13254476Application Date: 2010-03-02
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Publication No.: US08541963B2Publication Date: 2013-09-24
- Inventor: Hans Hermann Rottmerhusen
- Applicant: Hans Hermann Rottmerhusen
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Michael Best & Friedrich LLP
- Priority: DE102009011448 20090303; DE102009018238 20090421
- International Application: PCT/EP2010/052624 WO 20100302
- International Announcement: WO2010/105903 WO 20100923
- Main IPC: H02P3/22
- IPC: H02P3/22 ; H02P3/14 ; H02P25/14

Abstract:
The invention relates to an electrodynamic braking device and to a method for braking a universal motor having a field winding and an armature. The universal motor can be switched from a motor mode to a braking mode. In the motor mode, the armature and the field winding are supplied with an alternating current of a power grid. In the braking mode, the armature is short-circuited and the field winding continues to be supplied with an alternating current from the power grid. In a first phase of the braking mode, the field winding can be supplied with an alternating current having the frequency of the power grid. In a further phase of the braking mode, the field winding is supplied by the power grid with an alternating current having a frequency that is reduced with respect to the frequency of the power grid.
Public/Granted literature
- US20110316456A1 ELECTRODYNAMIC BRAKING DEVICE FOR A UNIVERSAL MOTOR Public/Granted day:2011-12-29
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