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US 5,552,686 AGranted
Series motor, in particular universal motor with brake device
AssigneeRobert Bosch GmbH
InventorsWolfgang Schmid, Werner Rieker, Eckerhard Stroetgen, Csaba Kreiter, Ottmar Seel
Life of this patent
Estimating the term…
Abstract
A series motor has a braking device, a stator having a field winding and a pole shoe plate pack, the pole shoe plate pack of the stator having field coils and also having a further element inducing a magnetic field, a rotatable armature, and an element for influencing a braking operation of the field winding.
Claims23
A series motor, comprising a braking device;
- a stator having a field winding and a pole shoe plate pack, said pole shoe plate pack of said stator having field coils and also having further means inducing a magnetic field;
- a rotatable armature;
- means for influencing a braking operation of said field winding;
- a starting resistor connected before one of said field coils;
- and a switch having a slow release switching contact and connected in parallel with said starting resistor.
2 more elements
A series motor, comprising a braking device;
- a stator having a field winding and a pole shoe plate pack, said pole shoe plate pack of said stator having field coils and also having further means inducing a magnetic field;
- a rotatable armature;
- means for influencing a braking operation of said field winding;
- and a diode connected before one of said field coils;
- and a switch having a slow release switching contact and connected in parallel with said starting resistor.
2 more elements
A series motor, comprising a braking device;
- a stator having a field winding and a pole shoe plate pack, said pole shoe plate pack of said stator having field coils and also having further means inducing a magnetic field;
- a rotatable armature;
- and means for influencing a braking operation of said field winding, said diode and said permanent magnet being formed so that a current direction of said diode and the polarity of said permanent magnet are adjusted and act on said permanent magnet in a field supporting manner.
A series motor, comprising a braking device;
- a stator having a field winding and a pole shoe plate pack, said pole shoe plate pack of said stator having field coils and also having further means inducing a magnetic field;
- a rotatable armature;
- means for influencing a braking operation of said field winding, said means influencing a braking operation including switching means for switching over said field winding to a braking operation, said switching means being provided with time function member, said time function member having a relay with contact sets;
- a slow release member associated with said relay;
- and a switch, said contact sets of said relay being formed so that after switching over of said switch between a generator operation and a braking operation said field coils are separated from a system voltage in a time delayed manner.
2 more elements
A series motor, comprising a braking device;
- a stator having a field winding and a pole shoe plate pack, said pole shoe plate pack of said stator having field coils and also having further means inducing a magnetic field;
- a rotatable armature;
- and means for influencing a braking operation of said field winding, at least one of said field coils having a switching off delay of at least 20 msec amounting to an uneven multiple of a duration of a half wave of a system voltage.
A series motor, comprising a braking device;
- a stator having a field winding and a pole shoe plate pack, said pole shoe plate pack of said stator having field coils and also having further means inducing a magnetic field;
- a rotatable armature;
- means for influencing a braking operation of said field winding, said means influencing a braking operation including at least one means selected from the group consisting of switching means for switching over said field winding to a braking operation and braking means inducing an additional magnetic field in the braking operation, said switching means being provided with time function member;
- and a commutator and brushes through which said armature is supplied with current.
1 more element
A series motor, comprising a braking device;
- a stator having a field winding and a pole shoe plate pack, said pole shoe plate pack of said stator having field coils and also having further means inducing a magnetic field;
- a rotatable armature;
- means for influencing a braking operation of said field winding, said means influencing a braking operation including braking means inducing an additional magnetic field in the braking operation;
- and a commutator and brushes through which said armature is supplied with current, said pole shoe plate pack having at least one pole provided with at least one groove.
1 more element
Dependencies are inferred from the claim text.