DC MOTOR WITH RETAINER FOR INTERPOLE COIL
A DC motor includes a field frame having a plurality of integral interpole coil cores. An interpole coil of the motor includes conductor turns and insulation. A retainer is mounted to the field frame at an axial end thereof, the retainer having a body portion extending radially inward and received by an interior of the interpole coil, and the retainer further having a stand-off projecting from the body portion. The interpole coil is positioned in a radial direction by the stand-off, and the interpole coil is secured to the stand-off.
1 . A DC motor comprising:
a field frame having a plurality of integral interpole coil cores;
an interpole coil including conductor turns and insulation; and
a retainer mounted to the field frame at an axial end thereof, the retainer having a body portion extending radially inward and received by an interior of the interpole coil, and the retainer further having a stand-off projecting from the body portion,
wherein the interpole coil is positioned in a radial direction by the stand-off, and the interpole coil is secured to the stand-off.
2 . The DC motor of claim 1 , wherein the retainer is mounted to the field frame with a pin.
3 . The DC motor of claim 1 , wherein the retainer is mounted to the field frame with a threaded fastener.
4 . The DC motor of claim 1 , wherein the stand-off is a first stand-off and the retainer further comprises a second stand-off, wherein the interpole coil is secured to the first and second stand-offs with lashing wrapped and tied around the interpole coil and both the first and second stand-offs.
5 . The DC motor of claim 1 , wherein the body portion of the retainer has a width measured perpendicular to the radial direction, the width corresponding to an interior width of the interpole coil.
6 . The DC motor of claim 1 , wherein the interpole coil is a replacement interpole coil.
7 . The DC motor of claim 1 , wherein the interpole coil is secured to the stand-off with lashing wrapped and tied around the interpole coil and the stand-off.
8 . The DC motor of claim 7 , wherein the lashing comprises woven glass and/or polyester tape.
9 . The DC motor of claim 1 , wherein the insulation of the interpole coil is resin coated.
10 . The DC motor of claim 1 , further comprising a spacer, wherein the interpole coil is positioned in the radial direction by the stand-off with the spacer therebetween.
11 . The DC motor of claim 1 , wherein the retainer is mounted to the field frame by the body portion, and wherein the stand-off projects orthogonally from the body portion.
12 . The DC motor of claim 1 , further comprising an additional retainer mounted to the field frame at an opposite axial end thereof, the additional retainer having a body portion extending radially inward and received by the interior of the interpole coil, and the additional retainer further having a stand-off projecting from the body portion thereof,
wherein a portion of the interpole coil at the opposite axial end is positioned in a radial direction by the stand-off of the additional retainer, and the portion of the interpole coil is secured to the stand-off of the additional retainer.