JP2004289992A - Armature and dc motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an armature in which teeth of an armature core facing each other while being spaced apart at 180° can be excited uniformly and the occurrence of uneven rotation, vibration and noise in the armature can be reduced surely. <P>SOLUTION: In the armature having a commutator composed of twenty two segments where an armature winding is composed of a pair of first and second armature coils, the first armature coil is connected with the first segment of the commutator and wound sequentially and alternately by short-alpha winding and long-alpha winding while surrounding the teeth of the armature core, and the second armature coil is connected with the twelfth segment of the commutator and wound sequentially and alternately by short-alpha winding and long-alpha winding while surrounding the teeth of the armature core. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a slot type armature and a DC motor.

  2. Description of the Related Art Conventionally, in a DC motor with a brush, for example, four or more brushes may be used for the purpose of reducing a load current per brush with an increase in output. In this case, it is ideal that a pair of brushes distributed with the same polarity are brought into synchronous contact with the commutator segments (commutator pieces).

  However, in practice, it is difficult with precision to bring individual brushes of the same polarity into contact with the commutator segments simultaneously. As a result, the balance between the excitation timings of the individual armature coils energized through the segments was lost, and as a result, vibration and abnormal noise were generated due to uneven rotation of the armature of the motor. These vibrations and abnormal noises are serious problems in performance and products, such as a decrease in operation response and generation of discomfort in motor applications (for example, home electric appliances and automobile parts).

  Therefore, conventionally, means and a method for eliminating the variation in brush contact in the winding of the armature have been disclosed (for example, see Patent Document 1).

  FIG. 5 is an explanatory diagram showing an armature of a DC motor having a 4-pole, 4-brush, 22-segment commutator and a winding method of the armature. An armature 50 of this DC motor is provided with a shaft 51, an armature core 52 fixed to the shaft 51 and having 22 slots, and fixed to one end of the shaft 51, and at equal angular intervals on the circumference. And a commutator 53 having 22 segments 54.

  The winding of each of the armature coils 55, 56, 57, 58 around each slot of the armature core 52 is performed in two upper and lower layers with respect to the armature core 52 that is 180 ° opposite to each other. That is, the starting end of the first armature coil 55 for the lower layer is connected to the first segment (S1) of the commutator 53, and the first armature coil 55 for the lower layer passes through the vicinity of the shaft 51 while being entangled. After winding around the armature core 52 opposed to the first segment (S1) by 180 ° with a long alpha winding through predetermined slots, the lower first armature coil 55 is tangled around the shaft 51 again. Then, the wire is connected to the second segment (S2) adjacent to the first segment (S1) of the commutator 53. Then, similarly, the operation is sequentially performed up to the twelfth segment (S12) of the commutator 53 while rotating the armature 50.

  At the same time, the starting end of the lower armature coil 56 for the lower layer is connected to the twelfth segment (S12) of the commutator 53, and the lower armature coil 56 for the lower layer is routed around the shaft 52 while being entangled. After winding around the armature core 52 facing the twelfth segment (S12) by 180 ° with a long alpha winding via predetermined slots, the second armature coil 56 for the lower layer is tangled around the shaft 52 again. After connecting, it is connected to the thirteenth segment (S13) adjacent to the twelfth segment (S12) of the commutator 53. Then, similarly, the operation is sequentially performed up to the first segment (S1) of the commutator 53 while rotating the armature 50.

  Next, the starting end of the first armature coil 57 for the upper layer is connected to the first segment (S1) of the commutator 53, and the first armature coil 57 for the upper layer is connected to the electric motor corresponding to the first segment (S1). The coil is wound around the child core 52 through predetermined slots by short alpha winding, and then connected to the second segment (S2) of the commutator 53. Then, similarly, the operation is sequentially performed up to the twelfth segment (S12) of the commutator 53 while rotating the armature 50.

  At the same time, the starting end of the second armature coil 58 for the upper layer is connected to the twelfth segment (S12) of the commutator 53, and the second armature coil 58 for the upper layer corresponds to the twelfth segment (S12). The armature core 52 is wound around the armature core 52 with short alpha windings via predetermined slots, and then connected to the thirteenth segment (S13) of the commutator 53. Then, similarly, the operation is sequentially performed up to the first segment (S1) of the commutator 53 while rotating the armature 50.

  Therefore, a set of the lower first armature coil 55 serving as the lower winding and the second upper armature coil 58 serving as the upper winding facing the first armature coil 55 and the lower winding A pair of a lower second armature coil 56 serving as a wire and a first upper armature coil 57 serving as an upper winding facing the second armature coil 56 is opposed by 180 °. The segments 54 of the same phase of the commutator 53 can be crossed and connected to each other. Thus, when the brushes (not shown) of the same polarity contact the segments 54 of the same phase of the commutator 53, even if the timing of the brush contact is shifted, the slots of the armature core 52 opposed by 180 ° are equal. Will be excited. As a result, the imbalance of the excitation due to the segment contact displacement of the brush is suppressed, and the occurrence of vibration and abnormal noise due to the uneven rotation of the armature 50 of the DC motor can be reduced.

JP 2001-95219 A

Japanese Patent Publication No. 7-44810

However, in the above-described conventional armature 50 and the winding method of the armature 50, the lower layers of the armature windings 55 to 58 wound around the armature core 52 are all formed of long alpha winding, and the upper layers thereof are all formed of short alpha winding. Therefore, the same amount of current may not flow through the two armature coils wound at positions 180 ° opposite to each other due to differences in the shape and the like of the armature core 52. As a result, the positions of the armature cores 52 opposed to each other by 180 ° are excited unequally, so that the excitation force is imbalanced in the armature cores 52, and the occurrence of rotation unevenness, vibration, and abnormal noise is not sufficiently improved.

  Accordingly, the present invention has been made to solve the above-described problem, and the same and the same amount of current is applied simultaneously to each armature coil wound around each of the 180 ° opposed teeth of the armature iron core. ° It is an object to provide an armature and a DC motor that can evenly excite the mutually facing teeth and can more reliably reduce the occurrence of uneven rotation, vibration, and abnormal noise.

  According to the first aspect of the present invention, there is provided an armature core fixed to the shaft and having 22 teeth separated by slots, and an armature winding wound over every five teeth of the armature core. A wire and a commutator formed of 22 segments fixed to the shaft and connected to the armature winding, wherein the armature winding is formed of a first and a second pair of armature coils. In the armature, a first armature coil is connected to the first segment of the commutator, and is wound around the first to fifth teeth of the armature core by short alpha winding. And connected to the second segment adjacent to the first segment, and then surrounds the thirteenth to seventeenth teeth opposed to the second to sixth teeth at an angle of 180 °. The first armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding alternately and connected to the third segment. A child coil is connected to the twelfth segment of the commutator, and is wound in a short alpha winding around the twelfth to sixteenth teeth of the armature core to form a thirteenth adjacent to the twelfth segment. Is connected to the 13th to 17th teeth at an angle of 180 °, and is wound around the second to sixth teeth facing each other with a long alpha winding to form the 14th segment. The second armature coil is connected to the teeth of the armature core alternately in short alpha winding and long alpha winding. Characterized in that it is configured wound surrounds.

  According to a second aspect of the present invention, there is provided an armature core fixed to the shaft, having an armature having 22 teeth separated by slots, and an armature winding wound over every five teeth of the armature core. A wire and a commutator formed of 22 segments fixed to the shaft and connected to the armature winding, wherein the armature winding is formed of a first and a second pair of armature coils. In the armature, a first armature coil is connected to the first segment of the commutator and wound around the twelfth to sixteenth teeth of the armature core in a long alpha winding. Connected to the second segment adjacent to the first segment and then wound around the second to sixth teeth with a short alpha winding and connected to the third segment, As soon as one armature coil is wound around the teeth of the armature core alternately with long alpha winding and short alpha winding, the second armature coil is connected to a twelfth segment of a commutator, The first to fifth teeth of the armature core are wound with a long alpha winding and connected to the thirteenth segment adjacent to the twelfth segment, and then to the thirteenth to seventeenth teeth. It is wound around the teeth with short alpha winding and connected to the fourteenth segment, and the second armature coil is sequentially wound around the teeth of the armature core alternately with long alpha winding and short alpha winding. It is characterized by having been done.

  According to a third aspect of the present invention, there is provided an armature core fixed to the shaft and having eighteen teeth separated by slots, and an armature winding wound over every four teeth of the armature core. A wire and a commutator comprising 18 segments fixed to the shaft and connected to the armature winding, wherein the armature winding is formed from a first and a second pair of armature coils. In the armature, a first armature coil is connected to a first segment of the commutator, and is wound around the first to fourth teeth of the armature core by short alpha winding. And connected to the second segment adjacent to the first segment, and then surround the eleventh to fourteenth teeth opposite to the second to sixth teeth at an angle of 180 °. The first armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding alternately and connected to the third segment. A child coil is connected to the tenth segment of the commutator, and is wound around the tenth to thirteenth teeth of the armature core with a short alpha winding so as to be adjacent to the tenth segment. Is connected to the 11th to 14th teeth at an angle of 180 °, and is wound around the second to fifth teeth at an angle of 180 ° with a long alpha winding to form a twelfth segment. The second armature coil is connected to the teeth of the armature core alternately in short alpha winding and long alpha winding. Characterized in that it is configured wound surrounds.

  According to a fourth aspect of the present invention, there is provided an armature core fixed to the shaft and having eighteen teeth separated by slots, and an armature winding wound over every four teeth of the armature core. A wire and a commutator comprising 18 segments fixed to the shaft and connected to the armature winding, wherein the armature winding is formed from a first and a second pair of armature coils. In the armature, a first armature coil is connected to the first segment of the commutator and is wound around the eleventh to fourteenth teeth of the armature core in a long alpha winding. Connected to the second segment adjacent to the first segment and then wound around the second to fourth teeth in a short alpha winding and connected to the third segment; As soon as one armature coil is wound around the teeth of the armature core alternately in a long alpha winding and a short alpha winding, the second armature coil is connected to a tenth segment of a commutator, and The first to fourth teeth of the armature core are wound in a long alpha winding around the four teeth and connected to the eleventh segment adjacent to the tenth segment, and then to the eleventh to fourteenth teeth. The teeth are wound around the teeth with short alpha winding and connected to the twelfth segment, and the second armature coil is sequentially wound around the teeth of the armature core with long alpha winding and short alpha winding alternately. It is characterized by having been done.

  According to a fifth aspect of the present invention, there is provided an armature core fixed to the shaft and having 26 teeth separated by slots, and an armature winding wound around every six teeth of the armature core. A wire and a commutator composed of 26 segments fixed to the shaft and connected to the armature winding, wherein the armature winding is formed of a first and a second pair of armature coils. In the armature, a first armature coil is connected to a first segment of the commutator, and is wound around the first to sixth teeth of the armature core by short alpha winding. And connected to the second segment adjacent to the first segment, and then surround the 14th to 19th teeth 180 ° opposite to the 2nd to 7th teeth at an angle of 180 °. The first armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding alternately and connected to the third segment. A child coil is connected to the fourteenth segment of the commutator and is wound around the sixteenth to nineteenth teeth of the armature core in a short alpha winding to form a fifteenth segment adjacent to the fourteenth segment. And then wound with a long alpha winding around the 2nd to 7th teeth facing each other at an angle of 180 ° with the 14th to 20th teeth. The second armature coil is connected to the teeth of the armature core alternately in short alpha winding and long alpha winding. Characterized in that it is configured wound surrounds.

  According to a sixth aspect of the present invention, there is provided an armature core fixed to the shaft and having 26 teeth separated by slots, and an armature winding wound over every six teeth of the armature core. A wire and a commutator composed of 26 segments fixed to the shaft and connected to the armature winding, wherein the armature winding is formed of a first and a second pair of armature coils. In the armature, a first armature coil is connected to the first segment of the commutator, and is wound around the sixteenth to nineteenth teeth of the armature core with a long alpha winding. Connected to the second segment adjacent to the first segment, then wound around the second to seventh teeth in a short alpha winding and connected to the third segment, As soon as one armature coil is wound around the teeth of the armature core alternately with long alpha winding and short alpha winding, the second armature coil is connected to a fourteenth segment of a commutator, and The first to sixth teeth of the armature core are wound with long alpha windings and connected to the 15 segments adjacent to the 14th segment, and then the 15th to 20th teeth are wound. The second armature coil is sequentially wound around the teeth of the armature core in a long alpha winding and a short alpha winding alternately and wound around the 16th segment and connected to the 16th segment. It is characterized by having.

  According to a seventh aspect of the present invention, a magnetic yoke, a four-pole magnet supported by the magnetic yoke and arranged in a substantially cylindrical shape, and a magnet arranged in the substantially cylindrical shape are arranged so as to be rectified with a shaft. An armature according to any one of claims 1 to 6, wherein in a DC motor comprising an armature having an armature and four brushes contacting a commutator of the armature, the armature is the armature according to any one of claims 1 to 6. It is characterized by being.

  As described above, according to the first aspect of the present invention, the shaft, the armature core fixed to the shaft and having 22 teeth separated by slots, and the teeth of every five armature cores And a commutator composed of 22 segments fixed to the shaft and connected to the armature winding, wherein the armature winding is a first and a second pair. The first armature coil is connected to the first segment of the commutator, and the first armature coil surrounds the first to fifth teeth of the armature core. And connected to the second segment adjacent to the first segment, and then the thirteenth to seventeenth teeth opposed to the second to sixth teeth at an angle of 180 °. Surround The first armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding, and is connected to the third segment. A coil connected to the twelfth segment of the commutator and a thirteenth segment adjacent to the twelfth segment wound around the twelfth to sixteenth teeth of the armature core in a short alpha winding Then, the 13th to 17th teeth are wound with a long alpha winding around the 2nd to 6th teeth facing each other at an angle of 180 ° and connected to the 14th segment. And the second armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding. And the same amount of current is simultaneously applied to each armature coil wound around each 180 ° facing tooth of the armature core to excite each 180 ° facing tooth equally. be able to.

  According to the invention of claim 2, an armature core fixed to the shaft and having 22 teeth separated by slots, and an electric machine wound around every five teeth of the armature core Armature winding and a commutator fixed to the shaft and composed of 22 segments connected to the armature winding, and the armature winding includes a first and a second pair of armature coils. In the armature, a first armature coil is connected to the first segment of the commutator, and is wound around the twelfth to sixteenth teeth of the armature core in a long alpha winding to form a first armature coil. Is connected to the second segment adjacent to the second segment, and then wound around the second to sixth teeth with a short alpha winding and connected to the third segment, and sequentially connected to the first electric machine. The coil is wound around the teeth of the armature core alternately with long alpha windings and short alpha windings, and the second armature coil is connected to the twelfth segment of the commutator, starting from the first armature core. A long alpha winding around the fifth five teeth is connected to the thirteenth segment adjacent to the twelfth segment, and then a short alpha winding around the thirteenth to seventeenth teeth. The armature core is wound and connected to the fourteenth segment, and the second armature coil is sequentially wound around the teeth of the armature core alternately in a long alpha winding and a short alpha winding. At the same time, the same amount of current is applied to each armature coil wound on each of the teeth facing each other at 180 °. Each tooth can be equally excited.

  According to the invention of claim 3, an armature core fixed to the shaft, having 18 teeth separated by slots, and an electric motor wound around every four teeth of the armature core Armature winding, and a commutator formed of 18 segments fixed to the shaft and connected to the armature winding, wherein the armature winding includes a first and a second pair of armature coils. In the armature, a first armature coil is connected to a first segment of the commutator, and is wound around the first to fourth teeth of the armature core by short alpha winding. A long alpha winding connected to the second segment adjacent to the first segment and then surrounding the eleventh to fourteenth teeth opposite to the second to sixth teeth at an angle of 180 ° The first armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding alternately and connected to the third segment, and the second armature coil is rectified. And connected to the eleventh segment adjacent to the tenth segment by being wound around the tenth to thirteenth four teeth of the armature core with a short alpha winding. Then, the eleventh to fourteenth teeth are wound with a long alpha winding around the second to fifth teeth facing each other at an angle of 180 ° and connected to the twelfth segment, and sequentially connected to the twelfth segment. 2 armature coils are wound around the teeth of the armature core alternately in short alpha winding and long alpha winding. Since it is, it is possible to uniformly excite the respective teeth of said 180 ° phase opposite to flow in each armature coil wound around each tooth to 180 ° phase counter current of simultaneous and identical amounts of the armature core.

  According to the invention of claim 4, an armature core fixed to the shaft and having 18 teeth separated by slots, and an electric motor wound around every four teeth of the armature core Armature winding, and a commutator formed of 18 segments fixed to the shaft and connected to the armature winding, wherein the armature winding includes a first and a second pair of armature coils. In the armature, a first armature coil is connected to the first segment of the commutator, and is wound around the eleventh to fourteenth teeth of the armature core in a long alpha winding to form a first armature coil. Is connected to the second segment adjacent to the second segment and then wound around the second to fourth teeth with a short alpha winding and connected to the third segment, and sequentially connected to the first electric machine. The coil is wound around the teeth of the armature core alternately with long alpha windings and short alpha windings, and the second armature coil is connected to the tenth segment of the commutator, starting from the first armature core. A long alpha winding around the fourth four teeth is connected to the eleventh segment adjacent to the tenth segment, and then a short alpha winding around the eleventh to fourteenth teeth. It is wound and connected to the twelfth segment, and the second armature coil is sequentially wound around the teeth of the armature core in a long alpha winding and a short alpha winding alternately. At the same time, the same amount of current is applied to each armature coil wound around each of the 180 ° opposed teeth so that each of the 180 ° opposed Isu can be equally excited.

  According to the armature according to the fifth aspect of the present invention, the shaft, the armature core fixed to the shaft and having 26 teeth separated by slots, and the armature core every six teeth are wrapped around the shaft. Armature winding, and a commutator composed of 26 segments fixed to the shaft and connected to the armature winding, the armature winding comprising a first and a second pair of armatures. In an armature comprising a coil, a first armature coil is connected to a first segment of a commutator, and is wound around the first to sixth teeth of the armature core with a short alpha winding. Is connected to the second segment adjacent to the first segment, and then is extended around the 14th to 19th teeth opposite to the 2nd to 7th teeth at an angle of 180 °. The first armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding alternately and connected to the third segment. Is connected to the fourteenth segment of the commutator, and is wound around the sixteenth to nineteenth teeth of the armature core by short alpha winding so as to be adjacent to the fifteenth segment. Connected to the segment and then wound around the 2nd to 7th teeth facing each other at an angle of 180 ° with the 14th to 20th teeth in a long alpha winding and connected to the 16th segment The second armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding. Therefore, it is possible to simultaneously and simultaneously excite each of the 180 ° opposed teeth by applying the same amount of current to each armature coil wound on each of the 180 ° opposed teeth of the armature core. it can.

  According to the invention of claim 6, an armature core fixed to the shaft and having 26 teeth separated by slots, and an electric machine wound around every six teeth of the armature core And a commutator composed of 26 segments fixed to the shaft and connected to the armature winding, wherein the armature winding includes a first and a second pair of armature coils. In the armature, a first armature coil is connected to the first segment of the commutator, and is wound around the sixteenth to nineteenth teeth of the armature core in a long alpha winding to form a first armature coil. Is connected to the second segment adjacent to the second segment and then wound around the second to seventh teeth in a short alpha winding and connected to the third segment. A coil is wound around the teeth of the armature core alternately in a long alpha winding and a short alpha winding, and a second armature coil is connected to a fourteenth segment of the commutator, and a first of the armature core is wound. The sixth to sixth teeth are wound in a long alpha winding and connected to the 15 segments adjacent to the fourteenth segment, and then are wound in short alpha windings to surround the fifteenth to twentieth teeth. The armature core is wound and connected to the sixteenth segment, and the second armature coil is sequentially wound around the teeth of the armature core alternately in a long alpha winding and a short alpha winding. At the same time, the same amount of current is applied to each armature coil wound around each of the 180 ° opposed teeth. Each tooth can be equally excited to.

  According to the seventh aspect of the present invention, the magnetic yoke, the four-pole magnet supported by the magnetic yoke and arranged in a substantially cylindrical shape, and the magnet arranged in a substantially cylindrical shape are arranged to rectify the shaft. An armature having an armature and four brushes that contact a commutator of the armature, wherein the armature is the armature according to any one of claims 1 to 6. Therefore, the same amount of current can be simultaneously and simultaneously applied to the armature coils wound around the 180 ° opposed teeth of the armature core to uniformly excite the 180 ° opposed teeth. Thereby, the occurrence of rotation unevenness, vibration, and abnormal noise of the armature can be more reliably reduced.

  Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the accompanying drawings.

  FIG. 1 is a side view showing a brushed DC motor according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the relationship between slots, teeth and segments of an armature core of an armature used in the DC motor, and FIG. FIG. 4 is a schematic diagram showing a winding in the first embodiment of the armature according to the present invention, and FIG. 4 is a schematic diagram showing a winding in the second embodiment of the armature according to the present invention.

  As shown in FIG. 1, a DC motor with brush (DC motor) 30 is fixed to an armature (armature) 40, a yoke 31 for rotatably supporting the armature 40, and an inner peripheral surface of the yoke 31. It includes four magnets (magnetic poles) 32, four brushes 33 slidably contacting a commutator (commutator) 48 of the armature 40, and a cover 34 that covers the opening of the yoke 31.

  As shown in FIG. 1, the armature 40 includes a shaft 41, an armature core (armature core) 42 fixed to the shaft 41, and having 22 teeth 44 on the outer circumference via respective slots 43. An armature winding 45 composed of first and second armature coils 46 and 47 wound around each tooth 44 of the armature core 42 via each slot 43, and fixed to one end 41a of the shaft 41; And a commutator 48 composed of 22 segments (commutator pieces) 49. Further, both ends of the shaft 41 are rotatably supported by a bearing 35 provided in a concave portion at the bottom of the yoke 31 and a bearing 36 provided in the center of the cover 34.

  As shown in FIG. 2, the position of each tooth 44 at the skew center of 22 teeth 44 of the armature core 42 (indicated by reference numerals 1 to 22 in FIG. 2, FIG. 3 and FIG. 4) is rectified. The child 48 is located at the boundary of each adjacent segment 49 of the 22 segments 49 (indicated in the order of 1 to 22 in FIGS. 2, 3 and 4). That is, the position of each segment 49 at the skew center of the 22 segments 49 of the commutator 48 is located at the boundary between the adjacent teeth 44 of the 22 teeth 44 of the armature core 42. Further, the coil pitch of the armature winding 45 is at intervals of the five teeth 44, and the winding direction is right-handed. The feed direction of the armature core 42 at this time is left feed.

  Next, the first and second armature windings 45 constituting the armature winding 45 at intervals of five predetermined teeth 44 of the armature iron core 42 of the 4-pole, 4-brush, 22-segment brushed DC motor 30. The procedure for simultaneously winding the armature coils 46 and 47 will be described with reference to FIGS. 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b).

  FIG. 3 is a view showing the first embodiment of the present invention. As shown in FIG. 3A, the first commutator 48 has a first first segment (1) connected to a locking piece 49a. The armature coil 46 is wound around the teeth (1 to 5) of the armature core 42 with the short alpha winding 46a, and connected to the locking piece 49a of the second segment (2). Next, the first armature coil 46 is wound around the teeth (13 to 17) of the armature core 42 with a long alpha winding 46b, and connected to the locking piece 49a of the third segment (3).

  At the same time, as shown in FIG. 3B, the second armature coil 47 connected to the locking piece 49 a of the twelfth twelfth segment (12) of the commutator 48 is connected to the armature core 42. Each tooth (12 to 16) is wound with a short alpha winding 47a and connected to the locking piece 49a of the thirteenth segment (13). Next, the second armature coil 47 connected to the locking piece 49a of the thirteenth segment (13) is wound around each of the teeth (2 to 6) of the armature core 42 by a long alpha winding 47b.

  Next, as shown in FIG. 3A, the first armature coil 46 is sequentially turned into a short alpha winding and a long alpha winding from the locking piece 49a of the third third segment (3) of the commutator 48. As a result, the windings are alternately wound around the teeth of the armature core 42, and sequentially from the locking pieces 49 a of the 22nd segment (22) to the locking pieces 49 a of the first segment (1). The armature coil 46 is wound, and the armature winding 45 is formed on the armature core 42.

  Further, as shown in FIG. 3B, the second armature coil 47 is alternately formed by short alpha winding and long alpha winding sequentially from the locking piece 49a of the fourteenth segment (14) of the commutator 48. The second armature coil 47 is continuously wound around the teeth of the armature core 42 and successively from the locking piece 49a of the eleventh segment (22) to the locking piece 49a of the twelfth segment (12). To form an armature winding 45 on the armature core 42.

  At this time, the first armature coil 46 and the second armature coil 47 face each other at an angle of 180 degrees and are simultaneously and continuously wound around the armature core 42, respectively. The armature winding 45 can be easily and smoothly wound around the entire circumference without any gap in a short time.

  FIG. 4 is a view showing Embodiment 2 of the present invention. As shown in FIG. 4A, the first commutator 48 is connected to the first piece (1) of the first segment (1). The armature coil 46 is wound around the teeth (12 to 16) of the armature core 42 with a long alpha winding 46d, and connected to the locking piece 49a of the second segment (2). Next, the first armature coil 46 is wound around each of the teeth (2 to 6) of the armature core 42 with the short alpha winding 46c, and connected to the locking piece 49a of the third segment (3).

  At the same time, as shown in FIG. 4B, the second armature coil 47 connected to the locking piece 49 a of the twelfth twelfth segment (12) of the commutator 48 is connected to the armature core 42. The teeth (1 to 5) are wound with a long alpha winding 47d and connected to the locking pieces 49a of the thirteenth segment (13). Next, the second armature coil 47 connected to the locking piece 49a of the thirteenth segment (13) is wound around the teeth (13 to 17) of the armature core 42 by the short alpha winding 47c.

  Next, as shown in FIG. 4A, the first armature coil 46 is sequentially turned into a long alpha winding and a short alpha winding from the locking piece 49a of the third third segment (3) of the commutator 48. As a result, the windings are alternately wound around the teeth of the armature core 42, and sequentially from the locking pieces 49 a of the 22nd segment (22) to the locking pieces 49 a of the first segment (1). The armature coil 46 is wound, and the armature winding 45 is formed on the armature core 42. Further, as shown in FIG. 4B, the second armature coil 47 is alternately formed by sequentially turning the long alpha winding and the short alpha winding from the locking piece 49a of the fourteenth segment (14) of the commutator 48. The second armature coil 47 is continuously wound around the teeth of the armature core 42 and successively from the locking piece 49a of the eleventh segment (22) to the locking piece 49a of the twelfth segment (12). To form an armature winding 45 on the armature core 42.

  Also in this case, the first armature coil 46 and the second armature coil 47 face each other at an angle of 180 degrees and are simultaneously and continuously wound around the armature core 42, respectively. The armature winding 45 can be wound easily and smoothly in a short time with no gap around the entire circumference.

  According to each of these embodiments, each armature coil wound around each of the teeth 44 of the armature core 42 which faces each other by 180 ° even if the shape or the like of each of the teeth 44 of the armature core 42 varies as in the related art. The same amount of current flows through 46 and 47 simultaneously. This makes it possible to evenly excite the teeth 44 of the armature core 42 that face each other by 180 °, and to more reliably reduce uneven rotation, vibration, and abnormal noise of the armature 40 of the DC motor 30 with brush. be able to.

  According to each example of the above-described embodiment, a brushed DC motor (DC motor) in which armature windings are wound at intervals of five teeth in four poles, four brushes, and 22 segments has been described. Needless to say, the first and second embodiments can be applied to a brushed DC motor in which armature windings are wound at intervals of 4 or 6 teeth in 18 or 26 segments.

  Since the present invention is configured as described above, the same and the same amount of current is applied to each armature coil wound around each of the 180 ° opposed teeth of the armature core so that the 180 ° opposed The teeth can be evenly excited, and the occurrence of rotation unevenness, vibration, and abnormal noise can be more reliably reduced.

1 is a side view illustrating a brushed DC motor according to an embodiment of the present invention. It is explanatory drawing which shows the slot of the armature iron core of the armature used for the said DC motor, a tooth, and a segment. It is a schematic diagram which shows the winding in Example 1 of the armature by this invention, (a) is a figure which shows the winding process of the 1st armature coil to the armature iron core of the same armature, (b) It is a figure which shows the winding process of the 2nd armature coil to the armature core. It is a schematic diagram which shows the winding in Example 2 of the armature by this invention, (a) is a figure which shows the winding process of the 1st armature coil to the armature iron core of the same armature, (b). It is a figure which shows the winding process of the 2nd armature coil to the armature core. It is explanatory drawing which shows the winding to the conventional armature.

Explanation of reference numerals

30 DC motor with brush (DC motor)
31 Yoke 32 Magnet (magnetic pole)
33 brush 40 armature 41 shaft 41a one end 42 armature core 43 slot 44 teeth 45 armature winding 46 first armature coil 47 second armature coil 48 commutator 49 segment (commutator piece)
H perpendicular

Claims (7)

A shaft, an armature core fixed to the shaft and having 22 teeth separated by slots, an armature winding wrapped around every five teeth of the armature core, and fixed to the shaft And a commutator composed of 22 segments connected to the armature winding, wherein the armature winding comprises a first and a second pair of armature coils.
A first armature coil is connected to the first segment of the commutator, and is wound in a short alpha winding around the first to fifth five teeth of the armature core. Connected to the second segment adjacent to the segment and then wound with a long alpha winding around the thirteenth to seventeenth tooth opposite to the second to sixth tooth at an angle of 180 ° And the first armature coil is sequentially wound around the teeth of the armature core alternately in short alpha winding and long alpha winding, and is connected to the third segment.
The second armature coil is connected to a twelfth segment of a commutator, and is wound around the twelfth to sixteenth teeth of the armature core by short alpha winding to form a twelfth segment. Is connected to the thirteenth segment adjacent to the first and second teeth, and is wound with a long alpha winding around the second to sixth teeth facing each other at an angle of 180 ° with the thirteenth to seventeenth teeth. An armature connected to a fourteenth segment, wherein the second armature coil is wound around the teeth of the armature core alternately in short alpha winding and long alpha winding. A shaft, an armature core fixed to the shaft and having 22 teeth separated by slots, an armature winding wrapped around every five teeth of the armature core, and fixed to the shaft And a commutator composed of 22 segments connected to the armature winding, wherein the armature winding comprises a first and a second pair of armature coils.
A first armature coil is connected to the first segment of the commutator, and is wound in a long alpha winding around the twelfth to sixteenth teeth of the armature core to form a first segment. , And then wound around the second to sixth teeth with short alpha winding and connected to the third segment, and the first armature coil is sequentially wound with long alpha winding. And short alpha winding alternately wound around the armature iron teeth,
The second armature coil is connected to a twelfth segment of a commutator, and is wound around the first to fifth teeth of the armature core in a long alpha winding to form a twelfth segment. Is connected to the thirteenth segment, and then wound around the thirteenth to seventeenth teeth with a short alpha winding and connected to the fourteenth segment, and the second armature coil is sequentially wound with a long alpha winding. And an armature wound around the teeth of the armature core alternately with short alpha windings. A shaft, an armature core fixed to the shaft and having eighteen teeth separated by slots, an armature winding wrapped around every fourth tooth of the armature core, and fixed to the shaft And a commutator composed of 18 segments connected to the armature winding, wherein the armature winding comprises a first and a second pair of armature coils.
A first armature coil is connected to the first segment of the commutator and is wound around the first to fourth teeth of the armature core in a short alpha winding to form a first armature coil. Connected to the second segment adjacent to the segment and then wound with a long alpha winding around the eleventh to fourteenth teeth opposite to the second to sixth teeth at an angle of 180 ° And the first armature coil is sequentially wound around the teeth of the armature core alternately in short alpha winding and long alpha winding, and is connected to the third segment.
The second armature coil is connected to the tenth segment of the commutator, and is wound around the tenth to thirteenth teeth of the armature core in a short alpha winding to form a tenth segment. Is connected to the eleventh segment adjacent to the second tooth, and then is wound with a long alpha winding around the second to fifth teeth facing each other at an angle of 180 ° with the eleventh to fourteenth teeth. An armature connected to a twelfth segment, wherein a second armature coil is sequentially wound around a tooth of the armature core in a short alpha winding and a long alpha winding alternately. A shaft, an armature core fixed to the shaft and having eighteen teeth separated by slots, an armature winding wrapped around every fourth tooth of the armature core, and fixed to the shaft And a commutator composed of 18 segments connected to the armature winding, wherein the armature winding comprises a first and a second pair of armature coils.
A first armature coil is connected to the first segment of the commutator, and is wound around the eleventh to fourteenth teeth of the armature core in a long alpha winding to form a first segment. , And then wound around the second to fourth teeth with a short alpha winding and connected to the third segment, and the first armature coil is sequentially wound with a long alpha winding. And short alpha winding alternately wound around the armature iron teeth,
The second armature coil is connected to a tenth segment of a commutator, and is wound around the first to fourth teeth of the armature core in a long alpha winding to form a tenth segment. And connected to the twelfth segment by short alpha winding surrounding the eleventh to fourteenth teeth, and sequentially connected to the twelfth segment. And an armature wound around the teeth of the armature core alternately with short alpha windings. A shaft, an armature core fixed to the shaft and having 26 teeth separated by slots, an armature winding wrapped around every six teeth of the armature core, and fixed to the shaft. And a commutator composed of 26 segments connected to the armature winding, wherein the armature winding comprises a first and a second pair of armature coils.
A first armature coil is connected to the first segment of the commutator and is wound in a short alpha winding around six first to sixth teeth of the armature core. Connected to the second segment adjacent to the segment and then wound in a long alpha winding around the 14th to 19th teeth opposite to the 2nd to 7th teeth at an angle of 180 ° And the first armature coil is sequentially wound around the teeth of the armature core alternately in short alpha winding and long alpha winding, and is connected to the third segment.
The second armature coil is connected to a fourteenth segment of the commutator, and is wound around the sixteenth to nineteenth teeth of the armature core by short alpha winding to form a fourteenth segment. Is connected to the fifteenth segment adjacent to the second and seventh teeth, and is then wound with a long alpha winding around the second to seventh teeth facing each other at an angle of 180 ° with the fourteenth to twentieth teeth. An armature connected to a sixteenth segment, wherein a second armature coil is sequentially wound around a tooth of the armature core in a short alpha winding and a long alpha winding alternately. A shaft, an armature core fixed to the shaft and having 26 teeth separated by slots, an armature winding wrapped around every six teeth of the armature core, and fixed to the shaft. And a commutator composed of 26 segments connected to the armature winding, wherein the armature winding comprises a first and a second pair of armature coils.
A first armature coil is connected to the first segment of the commutator, and is wound in a long alpha winding around sixteenth to nineteenth teeth of the armature core to form a first segment. , And then wound around the second to seventh teeth with short alpha winding and connected to the third segment, and the first armature coil is sequentially wound with long alpha winding. And short alpha winding alternately wound around the armature iron teeth,
The second armature coil is connected to a fourteenth segment of a commutator, and is wound in a long alpha winding around six first to sixth teeth of the armature core to form a fourteenth segment. Is connected to the 15th segment adjacent to the 15th to 20th teeth, and then wound in short alpha winding around the 15th to 20th teeth and connected to the 16th segment. An armature characterized in that the armature is wound alternately around the teeth of the armature core with alpha winding. An armature provided with a magnetic yoke, a four-pole magnet supported by the magnetic yoke and arranged in a substantially cylindrical shape, and a shaft and a commutator arranged and surrounded by the magnet arranged in the substantially cylindrical shape. And a DC motor comprising four brushes contacting a commutator of the armature, wherein the armature is the armature according to any one of claims 1 to 6. DC motor.

Images