Coreless stepping motor and control method thereof

A stepping motor, ironless technology, applied in control system, motor generator control, magnetic circuit shape/style/structure, etc., can solve large inductance and cogging torque, reduce stepping angle precision of stepping motor Insufficient speed, insufficient motor bandwidth, etc., to overcome the positioning torque or stall torque, and reduce the effect of ripple

CN105245037AActive Publication Date: 2016-01-13ELITE SEMICON MEMORY TECH INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-01-13

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Abstract

The invention relates to a coreless stepping motor and a control method thereof. The coreless stepping motor comprises a stator group, a rotor group, a pivot, a shell body, a cover body and a plate body, and is characterized in that the stator group is composed of three groups of coils, and the three groups of coils are a first phase coil, a second phase coil and a third phase coil respectively; the first phase coil, the second phase coil and the third phase coil are around the rotor group; the pivot is pivoted with the rotor group; the shell body is used for accommodating the stator group and the rotor group; the cover body is connected to one end of the shell body; and the plate body is connected to the other end of the shell body relative to the cover body. According to the invention, a problem of positioning torque or cogging torque can be overcome, and the coreless stepping motor can improve the precision of a stepping angle of rotation and reduce the amount of vibration.
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Description

technical field

[0001] The invention relates to an ironless stepping motor and its control method, in particular to an ironless stepping motor applied to a servo machine and its control method. Background technique

[0002] Since stepping motors can be programmed and precisely controlled, stepping motors have been widely used in many fields. For example, precision machinery, instruments and components for motor vehicles, automatic opening and closing doors and windows, or other automatic control equipment and other servo machines. The types of stepping motors can be divided into three types according to the structure: permanent magnet type (permanent magnet type), variable reluctance VR type (variable reluctance type), and hybrid type (hybrid type). Currently, two-phase stepping motors are used in the market. the widest.

[0003] However, conventional two-phase stepping motors often have the problems of large torque ripple and high cogging torque, which cause excessive vib...

Examples

Embodiment Construction

[0072] figure 1 It is an exploded structure diagram of an iron-core stepping motor according to an embodiment of the present invention. Figure 2A It is a schematic cross-sectional view of an iron-less stepping motor according to another embodiment of the present invention. Figure 2B based on Figure 2A A schematic diagram of a control module of an ironless stepping motor according to another embodiment of the present invention. see figure 1 , Figure 2A and Figure 2B . An iron-core stepping motor 1 is suitable for a servo machine. The iron-less stepping motor 1 includes: a stator group 12, a rotor group 14, a pivot 16, a housing 18, a cover 20, A board body 22 and a control module 11 . Actually, the casing 18 is used to accommodate the stator set 12 and the rotor set 14 . The pivot 16 is pivotally connected to the rotor set 14 , and the pivot 16 is disposed on the same axis of the stator set 12 and the rotor set 14 . The cover body 20 and the board body 22 are resp...