Stator used in resolvers, and resolver including same

Abstract

The present invention relates to a stator used in resolvers, in which multiple slots are formed at constant intervals in the circumferential direction and have an excitation coil, a first output coil, and a second output coil are respectively wound around the multiple slots. The excitation coil is wound by a number of windings that is changed on the basis of a sinusoidal wave in accordance with the order of the multiple slots in the circumferential direction. After the first output coil is wound by a number of windings resulting from the division of the total number of windings by a constant ratio, the second output coil is wound, and then the rest of the first output coil is wound.

1 - 16 . (canceled) 
     
     
         17 . A stator used in resolvers, in which multiple slots are formed at constant intervals in a circumferential direction and have an excitation coil, a first output coil, and a second output coil, respectively, wound therearound, wherein the excitation coil is wound by the number of windings that is changed in a sinusoidal wave form in accordance with an order of the multiple slots in the circumferential direction, the first output coil is wound by the number of windings resulting from the division of the total number of windings by a constant ratio, the second output coil is wound, and then the rest of the first output coil is wound. 
     
     
         18 . A stator used in resolvers, in which multiple slots are formed at constant intervals in a circumferential direction and have an excitation coil, a first output coil, and a second output coil, respectively, wound therearound, wherein the first output coil is wound by the number of windings resulting from the division of the total number of windings by a constant ratio, the second output coil is wound, and then the rest of the first output coil is wound, and the multiple slots are provided in a plurality of even numbers. 
     
     
         19 . A stator used in resolvers, in which multiple slots are formed at constant intervals in a circumferential direction and have an excitation coil, a first output coil, and a second output coil, respectively, wound therearound, wherein the excitation coil is wound by the number of windings that is changed in a sinusoidal wave form in accordance with an order of the multiple slots in the circumferential direction and the multiple slots are provided in a plurality of even numbers. 
     
     
         20 . The stator used in resolvers of  claim 17 , wherein half of the total number of windings of the first output coil is wound, the second output coil is wound, and then the rest of the first output coil is wound. 
     
     
         21 . The stator used in resolvers of  claim 17 , wherein the winding direction of the first output coil or the second output coil is changed by being alternated by a predetermined number in accordance with an order of the multiple slots in a circumferential direction. 
     
     
         22 . The stator used in resolvers of  claim 17 , wherein the excitation coil is wound by the number of windings that is changed in a sinusoidal wave form in accordance with an order of the multiple slots in the circumferential direction,
 the first output coil is wound to have the number of windings changed in the sinusoidal wave form having a phase of +90° relative to a sinusoidal wave of the excitation coil, and   the second output coil is wound to have the number of windings changed in the sinusoidal wave form having a phase of −90° relative to the sinusoidal wave of the excitation coil.   
     
     
         23 . A stator used in resolvers, in which multiple slots are formed at constant intervals in a circumferential direction and have an excitation coil, a first output coil, and a second output coil, respectively, wound therearound, wherein the first output coil is wound at the same number of windings in accordance with an order of multiple slots in a circumferential direction by alternating the winding direction by two slots,
 the second output coil is wound at the same number of windings in accordance with an order of multiple slots in a circumferential direction by alternating the winding direction by two slots,   the excitation coil is wound by the number of windings that is changed in a sinusoidal wave form in accordance with the order of the multiple slots in the circumferential direction by a method of alternating the winding direction by at least two slots.   
     
     
         24 . The stator used in resolvers of  claim 23 , wherein the first output coil and the second output coil have a phase difference of 90°. 
     
     
         25 . The stator used in resolvers of  claim 23 , wherein the total number of turns of the first output coil or the second output coil is not less than two times or not more than three times the total number of turns of the excitation coil. 
     
     
         26 . A stator used in resolvers, in which multiple slots are formed at constant intervals in a circumferential direction and have an excitation coil, a first output coil, and a second output coil, respectively, wound therearound, wherein a continuous winding number in the same direction of the first output coil and the second output coil (the winding number in the same direction is a continuous winding number based on the order of multiple slots in the circumferential direction) is twice or more, and
 the continuous winding number in the same direction of the excitation coil is a multiple of the continuous winding number in the same direction of the first output coil or the second output coil.   
     
     
         27 . The stator used in resolvers of  claim 26 , wherein the first output coil and the second output coil have a phase difference of 90°. 
     
     
         28 . The stator used in resolvers of  claim 26 , wherein the first output coil or the second output coil has the same winding number at each slot. 
     
     
         29 . The stator used in resolvers of  claim 26 , wherein the continuous winding number in the same direction of the first output coil and the second output coil is equal to or more than three times, and
 the winding number of the first output coil or the second output coil at each slot has a sinusoidal wave form or a squared wave form.   
     
     
         30 . The stator used in resolvers of  claim 29 , wherein the total number of turns of the first output coil or the second output coil is not less than two times or not more than three times the total number of turns of the excitation coil. 
     
     
         31 . The stator used in resolvers of any one of  claims 17  to  20 ,  23  or  26 , wherein at least 20 slots are provided. 
     
     
         32 . A resolver including the stator used in resolvers of any one of  claims 17  to  20 ,  23 , or  26 .