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Home Generators or Motors Self-retained-RFI-suppression-choke-for-electric-motor

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 Self-retained RFI suppression choke for electric motor

Details
Inventors: Tyshchuk, Sergey; Seguin, John; Gubbels, Alex;
Assignee: Siemens VDO Automotive Inc. (Mississauga, CA)
Primary Examiner: Schuberg; Darren
Assistant Examiner: Scheuermann; David W.
Attorney, Agent or Firm:

A choke 20 is provided for suppressing radio-frequency interference of a brush-type motor. The choke includes a single wire having a portion wound about a coil axis A to define a plurality of coils 24 including two outermost coils 26 and 28. An attaching structure 30 extends from one of the outermost coils and includes a loop structure 42. The loop structure is constructed and arranged to be inserted into a slot 58 in a brush card 48 and moved into hooked relation with a retaining member 60 of the brush card that is associated with the slot so as secure the choke to the brush card. At least a portion of the attaching structure is constructed and arranged to be in electrical connection with a brush 56 of a motor when the choke is secured to the brush card. An elongated end portion 44 of the choke extends directly from the other of the outermost coils. The elongated end portion is constructed and arranged to be directly electrically connected to an electrical connector 54 when the choke is secured to the brush card.

DETAILED DESCRIPTION An object of the present invention is to fulfill the needs referred to above.
In accordance with the principles of the present invention, this objective is obtained by providing a choke for suppressing radio-frequency interference of a brush-type motor.
The choke includes a single wire having a portion wound about a coil axis to define a plurality of coils including two outermost coils.
An attaching structure extends from one of the outermost coils and includes a loop structure.
The loop structure is constructed and arranged to be inserted into a slot in a brush card and moved into hooked relation with a retaining member of the brush card associated with the slot, so as secure the choke to the brush card.
At least a portion of the attaching structure is constructed and arranged to be in electrical connection with a brush of the brush card when the choke is secured to the brush card.
An elongated end portion extends directly from the other outermost coil.
The elongated end portion is constructed and arranged to be directly electrically connected to an electrical connector of the brush card when the choke is secured to the brush card.
In accordance with another aspect of the invention, a brush card assembly for a d.
c.
motor includes at least one choke composed of a single wire having a portion wound about a coil axis to define a plurality of coils including two outermost coils.
An attaching structure extends from one of the outermost coils and includes a loop structure.
An elongated end portion extends from the other of the outermost coils.
A brush card has a top side and an opposing bottom side and slot through the opposing sides.
The brush card includes a retaining member adjacent to the slot.
The loop structure is received in the slot and is in hooked relation with the retaining member such that the choke is secured to the brush card.
A brush is mounted on the brush card and is in electrical connection with at least a portion of the attaching structure.
An electrical connector is mounted on the brush card and receives at least a part of the elongated end portion of the choke


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