×

Electronically commutated motor with nested radially stepped busbars

  • US 8,339,001 B2
  • Filed: 02/11/2009
  • Issued: 12/25/2012
  • Est. Priority Date: 02/12/2008
  • Status: Active Grant
First Claim
Patent Images

1. An electronically commutated motor, comprisinga rotor (34) that is rotatable about an imaginary axis (D),a stator arrangement in which is provided a number, evenly divisible by the number three or by an integral multiple thereof, of salient stator poles, associated with which arecoils (1

  • to 12

    ) that have associated with them, for electrical connection thereof,busbars (44, 46, 48), arranged on edge, that are arranged in an insulating part (42), which busbars each have a central portion (78) that runs circumferentially at a medium radial spacing (r2) from the imaginary axis (D) of the rotor (34), and a first end portion (90) that proceeds at a first radial spacing (r3) from the imaginary axis (D), which radial spacing (r3) is smaller than the medium radial spacing (r2), which first segment (90) transitions via a first deflection point (80) into the central portion (78), and a second end portion (64) that proceeds at a second radial spacing (rl) from the imaginary axis (D), which second radial spacing is larger than the medium radial spacing (r2) and transitions via a second deflection point (74) into the central portion (78),whereinsaid motor has, when viewed along said rotor axis, a first angular region or sector, and a second angular region or sector;

    in said first angular region (108), each of the busbars (44,46,48) is equipped with a connection capability (58U, 86V, 70W) for an associated electrical connector (120, 122, 124) proceeding in a direction away from the motor (32);

    said busbars (44, 46, 48) are insulated from one another and nested into one another, a radially outer second portion (64) of a first busbar (44, 46, 48) is extending, at said first angular region (108), as far as the vicinity of a first deflection point (74), located there, of a second busbar directly adjacent to that portion at that deflection,wherein, in at least said second angular region, diameters of adjacent portions of said busbars are stepped, with respect to each other, such that a radially inwardly located first end portion of a first busbar (W), a radially middle portion (78) of a second busbar (U) and a radially outwardly located end portion (64) of a third busbar (V) run circumferentially, side-by-side each other, from a beginning of to an end of said second angular region;

    wherein displacement of the aforesaid busbars (44, 46, 48) in a circumferential direction is mechanically limited in said first angular region (108),wherein hooks (62, 68, 82, 92, 94), for hooking in elements (63) of the stator winding, are provided on each of the busbars, andwherein those hooks (62U, 68W), which serve to hook in elements of the stator winding for the stator poles of the first angular region (108), are located outside of said first angular region (108).

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×