ELECTRIC MOTOR CONSTRUCTION

• US 3,809,935 A
• Filed: 09/15/1972
• Issued: 05/07/1974
• Est. Priority Date: 09/20/1971
• Status: Expired due to Term

• Current Assignee: Manfred Liska, Reiner Kristen
• Original Assignee: Manfred Liska, Reiner Kristen
• Inventors: Liska, Manfred, Kristen, Reiner
• Primary Examiner(s): Skudy, R.
• Application Number:
  US05/289,550
• Time in Patent Office: 599 Days
• Field of Search: 310/68,68D,DIG.3,68B,156,177,219 318/138,254
• US Class Current: 310/68.00R
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 29/08 using magnetic effect devices, e.g. Hall-plates, magneto-resistors H02K29/12 takes precedence

Abstract

A DC motor of the type commutated by Hall generators and solidstate switching elements is made with a construction at its end through which the motor'"'"''"'"'s field winding conductors extend, comprising a stack of parts connected together to that end of the motor and including a mounting for the Hall generators, a heat sink mounting the switching elements, and a circuit board for the various circuitry components.

Claims

1. A DC electric motor including a housing having end plates and containing a rotor and a field winding having connecting conductors extending therefrom at one axial end of the housing, and commutated by solid-state elements actuated by signal generators located for control by said rotor adjacent to said end and associated circuit components;

wherein the improvement comprises said rotor being journalled by and between said end plates, a carrier located adjacent to said end outside the end plate at said end and having axially inwardly extending projections on which said generators are carried, followed outwardly from said end by a heat sink mounting said elements and a circuit board on which said components are mounted, and means for connecting said carrier, a heat sink and board together and to said end respectively in interspaced relationship.

2. The motor of claim 1 in which said carrier and board are made of electrically insulating material and said heat sink is made of metal, said means spacing the solid-state elements on said heat sink from said carrier.

3. The motor of claim 1 in which said end has a circular portion concentric with said rotor'"'"''"'"'s axis and said carrier has arms extending to and engaging said portion and positioned to hold said carrier concentric with the axis of said rotor for a plurality of rotated positions, said projections extending from said carrier non-rotatively with respect thereto, said means including said arms.

4. The motor of claim 2 in which said means includes arms extending integrally from said carrier and engaging said heat sink, said elements being mounted on the latter in interspaced relation and said arms being interspaced between said elements, said heat sink having cooling means between said elements and said arms.

5. The motor of claim 4 in which said board is made of insulating material and said end has a circular portion concentric with said rotor'"'"''"'"'s axis and said carrier has arms extending to and engaging said portion and positioned to hold said carrier concentric with the axis of said rotor for a plurality of rotated positions, said projections extending from said carrier non-rotatively with respect thereto, said means including said arms.