CN215528718U - High-performance stepping motor stator core - Google Patents

Abstract

The utility model discloses a high-performance stepping motor stator core, wherein a stator magnetic yoke of the high-performance stepping motor stator core radially extends a plurality of winding parts, a tooth socket is arranged on a circular arc tooth shoe of each winding part, the center line of the tooth socket and the center line of each winding part have an offset angle, the precision is higher than that of two phases and three phases on the basis of smaller multiphase step angle, the tooth socket torque of the motor can be effectively weakened by utilizing the tooth sockets distributed at unequal angles, the vibration and noise of the motor in the running process are reduced, the low-speed and high-speed working conditions of the motor are relatively stable, and the power density is improved.

Description

High-performance stepping motor stator core

Technical Field

The utility model belongs to the field of motors, and particularly relates to a stator core of a stepping motor.

Background

The stator core is a main component of the motor stator, and the number of poles and phases of the stator core determine the driving performance of the motor. Most of the traditional motors are two-phase motors or three-phase motors, no third harmonic current exists, and iron cores are easy to saturate. Although the multiphase motor can output torque by utilizing third harmonic current, the current peak value can be effectively weakened, the saturation of magnetic density in an iron core is reduced, and the power density and the efficiency of the motor are improved. However, in the multi-phase motor, due to the action of the cogging of the stator core, the reluctance of the motor is not uniform, so that the magnetic energy changes with the change of the position of the rotor, and cogging torque is generated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-performance stator core of a stepping motor, which has smooth operation, low noise and high efficiency.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a high performance step motor stator core, includes stator yoke and wire winding portion, and the stator yoke radially extends a plurality of wire winding portions, and the tooth's socket has been seted up to the convex tooth boots of wire winding portion, the central line of tooth's socket has the declination with the central line of wire winding portion.

Further, each of the tooth slot deflection angles is different.

Further, the range of the cogging angle is 0 to 10 degrees.

Further, the tooth slots include at least one tooth slot having a center line at an off-angle from a center line of the winding portion.

Furthermore, the number of the tooth grooves is three, the tooth grooves are evenly distributed, and the center line of the middle tooth groove and the center line of the winding part form an inclined angle.

According to the technical scheme, the tooth grooves are designed into the deflection angle structure relative to the winding part, on the basis that the multiphase step angle is smaller (smaller than 1 degree), the precision is higher than that of two phases and three phases, the tooth grooves distributed at unequal angles are utilized to effectively weaken the tooth groove torque of the motor, the vibration and noise of the motor in the running process are reduced, the low-speed and high-speed working conditions of the motor are stable, and the power density is improved.

Drawings

Fig. 1 is a perspective view of a stator core of a high performance stepping motor.

Fig. 2 is a plan view of a high performance stepper motor stator core.

Fig. 3 is an enlarged view of the a-phase winding portion.

Fig. 4 is an enlarged view of the D-phase winding portion.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, a rotor hole 4 is machined in the center of a stator core of a high-performance stepping motor, a stator magnetic yoke 1 is arranged on the periphery of the stator core, and the center O of the rotor hole is concentric with the center O of the stator magnetic yoke. The stator yoke 1 extends radially with ten winding portions 2, the stator winding portions 2 being evenly spaced around the stator yoke 1, the center lines of the winding portions coinciding with the radial lines of the stator bore or the stator yoke, around which the coils are wound. Winding slots 3 are formed between adjacent winding portions 2, and the winding slots accommodate coils. The end part of the winding part 2 is a circular arc-shaped tooth shoe 5, the circular arc angle of the tooth shoe is beta, tooth grooves are formed in the tooth shoe 5, and the number of the tooth grooves is three and are circumferentially and uniformly distributed.

The ten winding parts are five pairs, each pair of winding parts are respectively in circumferential symmetrical arrangement, each pair of winding parts is used as a phase, and the winding parts of one phase are positive and negative poles. The ten winding parts are divided into a phase A, a phase B, a phase C, a phase D and a phase E, the adjacent phases of the phase A are the phase C and the phase D, and the adjacent phases of the phase B are the phase D and the phase E.

As shown in fig. 3, the center line of the intermediate tooth slot 6 of the tooth shoe 5 of the winding portion 2 of phase a coincides with the center line of the winding portion 2.

As shown in fig. 4, the center line of the middle slot 6 of the tooth shoe 2 of the winding portion 2 of the group D has an off-angle α with the center line of the winding portion 2, and the off-angle α is smaller than 10 degrees. Similarly, the center lines of the intermediate slots of the phases B, C and E also have an offset angle α with the center line of the winding portion.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims (5)

1. The utility model provides a high performance step motor stator core, includes stator yoke and wire winding portion, and the stator yoke radially extends a plurality of wire winding portions, and the tooth's socket has been seted up to the convex tooth boots of wire winding portion, its characterized in that: the central line of the tooth slot and the central line of the winding part form an offset angle.

2. The high performance stepper motor stator core as defined in claim 1, wherein: each tooth socket deflection angle is different.

3. The high performance stepper motor stator core as defined in claim 1, wherein: the range of the tooth socket deflection angle is 0 to 10 degrees.

4. The high performance stepper motor stator core as defined in claim 1, wherein: the tooth grooves comprise at least one tooth groove, and the center line of the tooth groove and the center line of the winding part form an offset angle.

5. The high performance stepper motor stator core as defined in claim 4, wherein: the number of the tooth grooves is three, the tooth grooves are evenly distributed, and the center line of the middle tooth groove and the center line of the winding part have a deflection angle.

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