Patent ID: 8704468

Claim:
An electrodynamic braking device for a universal motor having a non-transitory computer readable medium including a program for switching from motor operation to braking operation, wherein, during braking operation, a field winding ( 2 ) of the universal motor is fed from a power supply system and an armature ( 1 ) is shorted, wherein the executable program in a controller in control electronics ( 5 ) contains data, for a first and a second phase gating angle curve ( 23 ; 23 ′) and for a current nominal value curve ( 24 ) and for a half-cycle control curve ( 25 ), wherein the executable program in the controller is active for the first phase gating angle curve ( 23 ) at the start of a braking time (0 to x), and is chosen such that this results in the predetermined current nominal value curve ( 24 ), and an alternating current at a power supply system frequency is applied to the field winding ( 2 ), and the executable program in the controller is active for the second phase gating angle curve ( 23 ′) at the end of the braking time (x to y) in order to produce half-cycle packets ( 22 ; H 1 , H 2 ) and an alternating current at a lower frequency than the power supply system frequency is applied to the field winding ( 2 ).