Slot insulator and multiplexed resolver using same

1. A slot insulator, comprising:

an annular plate; and

a plurality of insulated winding parts disposed along a circumference of the annular plate, comprising:

a pair of shorter side parts, each having a length in a center axis direction of the annular plate, which is n times as large as a thickness of a stator yoke, wherein n is an integer, and the pair of shorter side parts are arranged in a circumferential direction of the annular plate; and

a longer side part which connects to each of the pair of shorter side parts so that the longer side part and the pair of shorter side parts surround an opening of an insertion groove on three sides at an inward end of the insulated winding part in a radial direction of the annular plate,

wherein the insulated winding parts are disposed along an inner circumference of the annular plate and protrudes toward a center of the annular plate;

wherein each of the insulated winding parts has an insulated winding holding part and the insertion groove capable of housing a winding part of a tooth in plural combined stator yokes, and the insertion groove opens in one direction along a center axis direction of the annular plate and opens at both ends of the insertion groove in the radial direction of the annular plate; and

wherein the insertion groove is a groove capable of housing the winding part of the tooth in plural stator yokes combined in the center axis direction.

2. The slot insulator according to claim 1 , which comprises an insulated winding part having a dummy insulated winding holding part that does not come in contact with a winding holding part of the stator yoke.

3. The slot insulator according to claim 1 , wherein all of the insulated winding parts are located at a common height position with respect to a plate surface of the annular plate, and each of the insulated winding parts have the insulated winding holding part at a common height position with respect to the plate surface of the annular plate.

4. A multiplexed resolver, comprising:

an assembly in which m stator yokes are assembled, wherein m is an integer; and

a pair of slot insulators each according to claim 1 , the assembly being sandwiched between the pair of slot insulators so that: one of the pair of the slot insulators houses p stator yokes in insertion grooves thereof; and the other of the pair of the slot insulators houses q stator yokes in insertion grooves thereof, wherein each of p and q is an integer, and the sum of p and q is m.