Electric motor with connecting element for a winding of a stator on a printed circuit board with at least two insulation displacement contacts

Patent metadata

Field	Value
Publication number	US-12095215-B2
Application number	US-202017618807-A
Country	US
Kind code	B2
Filing date	Mar 2, 2020
Priority date	Jun 14, 2019
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

An electric motor includes a rotor and a stator including a stator core and coils. The coils are defined by a winding wire including winding wire ends electrically contacted with a printed circuit board at an end surface through connectors. The connectors each include at least two insulation displacement contacts receiving a winding wire end of a stator winding. Each connector includes a single electrical connection to the printed circuit board. The connector includes a base body with an underside in contact with the printed circuit board. Each of the at least two insulation displacement contacts includes a clamping slot perpendicular to the underside of the base body. The clamping slots are defined by spaced legs extending from the base body, at least two of the spaced legs being resilient.

First claim

The invention claimed is:

1. An electric motor, comprising:
a rotor rotatable about an axis of rotation;
a stator including a stator core and coils wound on the stator core, the coils being defined by a winding wire with winding wire ends;
connectors; and
a printed circuit board including an end surface electrically contacted with the winding wire ends through the connectors; wherein
each of the connectors includes at least two insulation displacement contacts accommodating the winding wire ends;
each of the connectors includes a single electrical connection to the printed circuit board;
each of the connectors includes a base body which, in an assembled state, has an underside in contact with the printed circuit board, opposed lateral ends of the base body include recessed curved cavities defined therein below the at least two insulation displacement contacts;
each of the at least two insulation displacement contacts includes a clamping slot perpendicular to the underside of the base body, and the clamping slots are defined by spaced legs which extend from the base body;
at least two of the spaced legs are resilient;
the connectors are each defined by respective single one piece members; and
only a single portion of the connectors extends entirely through the printed circuit board.

2. The electric motor according to claim 1 , wherein the electrical connection is a solder connection or a single press-fit contact.

3. The electric motor according to claim 1 , wherein two of the clamping slots are defined by three of the legs, a middle leg of the three of the legs defining a portion of the at least two insulation displacement contacts.

4. The electric motor according to claim 3 , wherein the middle leg of the three of the legs is rigid.

5. The electric motor according to claim 1 , wherein the winding ends accommodated in the at least two insulation displacement contacts correspond to a single motor phase.

Assignees

• Nidec Gpm Gmbh

Inventors

• Schwamberger Frank
• Nickel Conrad

Classifications

• H01R2201/10

  for dynamoelectric machines · CPC title

• H01R12/53

  connecting to cables except for flat or ribbon cables · CPC title

• H01R4/2445

  the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives · CPC title

• H01R12/585

  Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board · CPC title

• H02K3/50

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title