JPH09261928A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a DC brushless motor by using the stator core of a 24-slot 6-pole induction motor in common. SOLUTION: A 24-slot stator core is composed of approximately U-shaped, approximately I-shaped and approximately inverse-U-shaped teeth parts. Outer windings 7a, 7b, 7c, 7d, 7e and 7f are wound between slots near the outer circumfereces of the approximately U-shaped and approximately inverse-U- shaped teeth parts and inner windings 8a, 8b, 8c, 8d, 8e and 8f are wound between slots near the inner circumferences of the approximately U-shaped and approximately inverse-U-shaped teeth parts on both the sides of the approximately I-shaped teeth parts. A pair of the facing inner windings 8a and 8b, 8c and 8d or 8e and 8f and a pair of the facing outer windings 7a and 7b, 7c and 7d or 7e and 7f which are provided in positions 90 deg. apart from the windings 8a and 8b, 8c and 8d or 8e and 8f are connected to each other respectively to form 3 sets of winding groups which are connected to each other to form a Δ-connection. A rotor made of a permanent magnets is placed inside the stator to realize an 8-pole DC brushless motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor, and more particularly, to a common use of a stator core, a winding method of a stator winding, and a connecting method.

[0002]

2. Description of the Related Art Conventionally, for example, a stator of an electric motor having 24 slots and 6 poles has a substantially I-shaped tooth portion 3 from a yoke portion 2 along an inner circumference of a stator core 1 as shown in FIG. Twelve teeth are provided at equal intervals, and substantially U-shaped teeth 5 and inverted substantially U-shaped teeth 4 are provided on both sides from every other base end of the substantially I-shaped teeth.
Grooves 6 are formed inside and outside the inverted U-shape to form 24 slots inside the stator core 1, and between the grooves near the outer periphery of the U-shape and the inverted U-shape. The outer winding 7 is wound, and then the inner winding 8 is wound between groove portions close to the inner circumference of the inverted substantially U-shape and the next substantially U-shape sandwiching the substantially I-shape. In this case, the stator core of the electric motor is exclusively used for the core of the 2-phase 6-pole capacitor induction motor, and for example, the core of the DC brushless electric motor is designed and manufactured separately. For this reason, a die for an iron core, an insulating material, etc. is required, and a different winding machine is required.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention, which has been made in view of the above problems, to provide different types of electric motors that share the same stator core.

[0004]

In order to achieve the above object, twelve substantially I-shaped tooth portions are provided at equal intervals from a yoke portion along an inner circumference of a stator iron core, and the substantially I-shaped tooth portions are provided. Providing approximately U-shaped and inverted approximately U-shaped tooth portions on both sides from the base end of every other tooth portion, and forming groove portions inside and outside the substantially U-shaped and inverted approximately U-shaped teeth, respectively. 24 slots are formed inside the stator core, and an outer winding portion is wound between groove portions near the outer periphery of the substantially U-shaped and the inverted U-shaped, and then the substantially I-shaped is sandwiched. In an electric motor in which an inner winding portion is wound between groove portions close to the inner circumference of an inverted substantially U-shaped shape and the next substantially U-shaped shape, inner winding portions facing each other and facing each other at positions different from each other by 90 °. The outer windings are connected to each other to form three groups of windings, the three groups of windings are Δ-connected, and a rotor composed of a permanent magnet is installed inside to form an eight-pole DC group. Try to be a brushless electric motor. Further, the energizing current of the winding group is repeatedly turned on / off by a drive circuit having 6 divided timing sections.
OFF control. And 2 of the winding group connected by the Δ
A pair of pairs is energized from one connection point of the Δ connection at the same time in the one timing section, and in the next timing section, one current direction of the two winding groups is set to the current direction of the previous timing section. And its winding group,
Similarly, the remaining winding groups are combined and paired with each other to be energized, and the combinations and current directions of the two winding groups are sequentially switched corresponding to the respective timing sections. On the other hand, the output stage of the drive circuit is composed of three circuits each having two transistors as a pair.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Twelve substantially I-shaped tooth portions are provided at equal intervals from a yoke portion along the inner circumference of a stator iron core, and every other base end of this substantially I-shaped tooth portion is provided. 24 teeth are formed inside and outside the stator iron core by providing substantially U-shaped and inverted substantially U-shaped tooth portions on both sides, and forming groove portions inside and outside the substantially U-shaped and reverse approximately U-shaped Slot is formed, an outer winding portion is wound between the groove portions near the outer periphery of the substantially U-shaped and the inverted substantially U-shaped, and then the substantially I-shaped is sandwiched and the substantially reverse U-shaped and the next substantially U-shaped are sandwiched. In an electric motor in which inner winding portions are wound between groove portions close to the inner circumference of a V shape, inner winding portions facing each other and outer winding portions facing each other at 90 ° different positions are connected to each other. To form an 8-pole DC brushless motor by forming 3 sets of winding groups, Δ-connecting the 3 sets of winding groups, and incorporating a rotor composed of a permanent magnet. You. Further, each tooth portion forming the slot is subjected to an insulation treatment, and the outer winding portion and the inner winding portion are combined and connected to each other so that the stator core of the two-phase and six-pole capacitor induction motor is shared and the two-phase and four-pole structure The capacitor induction motor of.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings with respect to a motor as a DC brushless motor which shares a stator core of a 24-slot capacitor induction motor. Note that the same reference numerals are used for the same parts as in the related art.
FIG. 1 is a plan view of a stator core used in the present invention. Along the inner circumference of the stator core 1, twelve tooth portions of the substantially I-shaped 3 from the yoke portion 2 are provided at equal intervals. Tooth sides of approximately U-shaped 5 and inverted approximately U-shaped 4 are provided on both sides from every other base end of the approximately I-shaped toothed portion, and inside of the substantially U-shaped and inverted approximately U-shaped are provided. The groove portion 6 is formed on the outer side, and the stator core 1 having 24 slots is formed. In addition, the widths of the substantially U-shaped, substantially I-shaped, and inverted substantially U-shaped tooth portions are made equal, and the density of the magnetic flux flowing through each tooth portion is made uniform to form a uniform magnetic pole. Insulation is applied to each tooth.

FIG. 2 shows an embodiment of the stator of the DC brushless motor of the present invention. The outer winding portions 7a, 7b, 7c, 7d, 7e, 7f are wound between the groove portions close to the outer periphery of the U-shape, and then the substantially I-shape is sandwiched between the inverted substantially U-shape and the next substantially U-shape. Inner winding portions 8a, 8b, 8c, 8 between the groove portions near the inner circumference
Wind d, 8e, and 8f. In this embodiment, the outer and inner winding parts are sequentially selected from windings facing each other. First, the inner winding portions 8 facing each other
a, 8b and outer winding portions 7a, 7b or inner winding portions 8c facing each other at positions different from each other by 90 °
8d and outer winding portions 7c, 7d or inner winding portions 8e, 8f facing each other at a position different from them by 90 °
Also, the outer winding portions 7e and 7f facing each other at positions different from each other by 90 ° are connected to form three winding groups. Next, the same three winding groups are Δ-connected as shown in FIG. Then, a rotor composed of a permanent magnet is incorporated in this stator so as to form an 8-pole DC brushless electric motor.

On the other hand, as shown in FIG. 3, transistors Tr1, Tr4 or Tr2, T having two output stages of the drive circuit are provided.
It is composed of three circuits having a pair of r5 or Tr3 and Tr6. Here, DP is a DC power supply. Further, as shown in FIG. 4, the drive circuit repeatedly ON / OFF-controls the energizing current of the winding group by the drive circuit having six divided timing sections. Here, the energization sequence 1, 2, ..., 6 represents a timing section, and the respective transistors Tr1, Tr2 ,.
The / OFF state is represented by 1 or 0. And FIG.
As shown in FIG. 4, two sets of the Δ-connected winding groups are set as a pair, and current is simultaneously supplied from one connection point of the Δ-connection within the one timing section. In the next timing section, one of the two winding groups has the same current direction as the current direction in the previous timing section, and
The remaining winding groups are combined with each other to form a pair and the same current is applied. Then, the combination of two winding groups and the current direction are sequentially switched corresponding to each of the timing sections. In the DC brushless motor thus configured, as shown in FIG. 5, the total number of N poles and S poles at one timing of energization is 8 poles. Note that the energization sequence 1, 2, ..., 6 represents the timing section, and a, b, c ,.
It is the name of the tooth portion, and matches the reference numeral in FIG. In this way, an 8-pole DC brushless motor can be constructed by sharing the stator core of the 2-phase 6-pole capacitor induction motor.

[0009]

As described above, in the present invention, twelve substantially I-shaped tooth portions are provided at equal intervals from the yoke portion along the inner circumference of the stator core, and the substantially I-shaped tooth portions are provided. Provided with substantially U-shaped and inverted approximately U-shaped tooth portions on both sides from the base end of every other, and forming the groove portions inside and outside the same approximately U-shaped and inverted approximately U-shaped Twenty-four slots are formed on the inner side of the child core, and an outer winding portion is wound between the groove portions near the outer circumference of the substantially U-shape and the inverted U-shape. In an electric motor in which an inner winding portion is wound between groove portions close to the inner circumference of a U-shape and the next U-shape, inner winding portions facing each other and 9
The outer winding parts facing each other at 0 ° different positions are connected to each other to form three sets of winding groups, and the three sets of winding groups are Δ-connected to each other to incorporate a permanent magnet rotor therein. By 8
Make it a pole DC brushless motor. As a result, the stator core of the two-phase, six-pole capacitor induction motor is also used to form the stator of the eight-pole DC brushless motor, so that the mold of the stator core, the insulator, etc. can be shared and the winding can be performed. Since the machines can be shared, it is possible to reduce capital investment and switching man-hours.

[Brief description of drawings]

FIG. 1 is a plan view of a stator core used in the present invention.

FIG. 2 is a plan view of a stator of an 8-pole DC brushless motor in one embodiment showing a state in which a winding is wound around a stator core of the present invention.

FIG. 3 is a connection diagram of three sets of winding groups that are Δ-connected to a transistor that is an output stage of a drive circuit of an 8-pole DC brushless motor according to the present invention.

FIG. 4 is an ON circuit corresponding to the order of energizing the windings of the transistors that form the drive circuit of the 8-pole DC brushless motor of the present invention.
It is explanatory drawing which shows a / OFF control state.

FIG. 5 is an explanatory view showing the polarities of the tooth portions corresponding to the order of energizing the windings of the 8-pole DC brushless motor of the present invention.

FIG. 6 is a plan view of a stator of a two-phase, six-pole capacitor induction motor as an example showing a state in which a winding is wound around a conventional stator core.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Yoke part 3 Approximately I-shaped 4 Reverse substantially U-shaped 5 Approximately U-shaped 6 Groove 7a, 7b, 7c, 7d, 7e, 7f Outer winding part 8a, 8b, 8c, 8d, 8e , 8f Inner winding part Tr1, Tr2, Tr3, Tr4, Tr5, Tr6 Transistor

Claims (4)

[Claims] 1. Twelve substantially I-shaped tooth portions are provided at equal intervals from a yoke portion along the inner circumference of a stator iron core, and both sides of the substantially I-shaped tooth portions are arranged at alternate base ends. 24 teeth slots inside the stator core by forming substantially U-shaped and inverted approximately U-shaped teeth on the inside and outside of the same U-shaped and inverted U-shaped teeth, respectively. And winding an outer winding part between the groove portions near the outer circumference of the substantially U-shape and the reverse substantially U-shape, and then sandwiching the substantially I-shape and the reverse substantially U-shape and the next substantially U-shape. In an electric motor in which inner winding portions are wound between groove portions close to the inner circumference of, the inner winding portions facing each other and the outer winding portions facing each other at a position different from each other by 90 ° are respectively connected to each other. A group of winding groups is formed, the three groups of winding groups are Δ-connected, and a rotor made of a permanent magnet is installed inside to form an 8-pole DC brushless motor. An electric motor. 2. A drive circuit having a timing section divided into 6 sections repeatedly turns on / off the energization current of the winding group.
The electric motor according to claim 1, wherein the electric motor is off-controlled. 3. A pair of winding groups connected by the Δ connection is used as a pair, and current is simultaneously supplied from one connection point of the Δ connection within the one timing section, and the two groups are connected in the next timing section.
Make one current direction of the winding group of the set the same as the current direction of the previous timing section, and combine that winding group with the remaining winding group to make a pair and energize in the same manner, and sequentially respond to each of the timing sections. 3. The electric motor according to claim 2, wherein the combination of two winding groups and the current direction are switched. 4. The electric motor according to claim 2, wherein the output stage of the drive circuit is composed of three circuits each having two transistors as a pair.