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Tapped speed regulation method of low-voltage brushless direct current motor

A technology of DC motor and speed regulation method, which is applied in the direction of single motor speed/torque control, etc., can solve the problems of increasing the cost of brushless DC motors, and achieve the effect of reducing costs

Inactive Publication Date: 2012-06-27
江门市胜思特电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these methods put forward higher requirements on the control part of the brushless DC motor, thus increasing the cost of the brushless DC motor

Method used

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  • Tapped speed regulation method of low-voltage brushless direct current motor
  • Tapped speed regulation method of low-voltage brushless direct current motor
  • Tapped speed regulation method of low-voltage brushless direct current motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 of the present invention describes a single-phase low-voltage brushless DC motor tapped speed regulation method, in which a multi-strand winding coil is wound on the stator core of the brushless DC motor, and the multi-strand winding coil The multi-strand winding wires are wound side by side in the slot of the stator core, and one end of the multi-strand winding coil is connected to the controller of the motor through an electronic switch or a mechanical switch. The wiring method of the winding of the brushless DC motor is as follows: the N-strand winding wires of the multi-strand winding are wound in parallel, the ends of all the winding wires with the same name are connected together and connected to a bridge of the bridge circuit, and the other end of the winding wire is single After the strands or multiple strands are connected in parallel, they are respectively connected to another bridge in the bridge circuit through a plurality of electronic switches ...

Embodiment 2

[0024] This matter example 2 is changed on the basis of embodiment 1, and it is mainly the difference of wiring mode, specifically as follows:

[0025] The brushless DC motor of this embodiment 2 is a two-phase brushless DC motor, and its wiring method is:

[0026] Two multi-strand winding coils are wound on the stator core, and the N-strand winding wires of each multi-strand winding coil are wound in parallel, and the end of the winding wire of each multi-strand winding coil is connected to the positive or negative pole of the power supply. The other end of the winding wire of each multi-strand winding is respectively connected to the driving circuit through a plurality of electronic switches or mechanical switches. Its wiring method is as figure 2 and image 3 shown.

Embodiment 3

[0028] This matter example 3 is changed on the basis of embodiment 1 equally, and it is mainly the difference of wiring mode, specifically as follows:

[0029] The brushless DC motor of the present embodiment 3 is a three-phase brushless DC motor, and its wiring method is:

[0030] Three multi-strand winding coils are wound on the stator core, and the multi-strand winding wires of each multi-strand winding coil are wound together, and one end of the winding wire of each multi-strand winding coil is respectively connected to the three ends of the bridge circuit. On a bridge, the winding wire of each multi-strand winding coil is connected to the other single-strand or multi-strand with the same name and then short-circuited by multiple electronic switches or mechanical switches. The wiring of the motor is as follows Figure 4 shown.

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Abstract

The invention discloses a tapped speed regulation method of a low-voltage brushless direct current motor. At least one multi-ply winding coil is wound on a stator core of a brushless direct current motor; multi-ply winding wires of the multi-ply winding coil are wound in parallel in a groove of the stator core; and one end of the multi-ply winding coil is connected with a controller of the motor by an electronic switch or a mechanical switch. The brushless direct current motor can carry out speed regulation by changing a wiring mode of the winding coil, wherein the wiring mode is a tapped mode. According to the method provided in the invention, it is only necessary to use a simple and low-cost control circuit without speed regulation in the control portion of the motor and to employ a winding mode that is especially designed for the brushless direct current motor, so that step speed regulation operation of the brushless direct current motor can be realized by a tapped switching mode. Moreover, the above-mentioned scheme not only can utilize an electronic switch mode to realize speed regulation but also is suitable for using a mechanical step switch mode to realize speed regulation.

Description

technical field [0001] The invention relates to a low-voltage brushless DC motor tap-type speed regulation method, in particular to a speed regulation method by changing the wiring mode of the brushless DC motor winding. Background technique [0002] The brushless DC motor is essentially a kind of synchronous motor, that is to say, the rotational speed (n) of the motor rotor changes in proportion to the frequency (f) of the rotating magnetic field of the stator and the number of poles (p) of the rotor: n=120f / p . When the number of poles of the rotor is fixed, changing the frequency of the stator's rotating magnetic field can change the speed of the rotor. The brushless DC motor is to add an electronic controller (driver) to the synchronous motor. The controller compares and corrects the position and speed signals of the motor rotor collected, so as to convert the input DC power into a controlled motor with a certain frequency. alternating current to drive the motor. Due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08
Inventor 张家驹张炯
Owner 江门市胜思特电器有限公司
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