Winding method for BLDC motor

Abstract

A winding method for a BLDC motor is disclosed. The winding method is configured to successively wind two magnetic wires across each core slot and its adjacent core slot (over two pitches) in a brushless direct current (BLDC) motor including a U-phase winding, a V-phase winding, a W-phase winding and a GND winding, 12 core slots, and a ground terminal. The winding method includes: a first step of moving and winding the magnetic wires; a second step of moving and winding the magnetic wires; a third step of moving and winding the magnetic wires; a fourth step of moving, winding, moving, and cutting the magnetic wires; a fifth step of moving and winding the magnetic wires; and a sixth step of moving the magnetic wires, passing the magnetic wires through an adjacent core slot and the ground terminal, and moving and cutting the magnetic wires.

Claims

1. A winding method for a BLDC motor, the method being configured to successively wind two magnetic wires (W) across each core slot and its adjacent core slot (over two pitches) in a brushless direct current (BLDC) motor including a U-phase winding, a V-phase winding, a W-phase winding and a GND winding, 12 core slots, and a ground terminal disposed between any two of the core slots, the method comprising: a first step of moving the magnetic wires (W) from any A-phase winding of the phase windings to any first pair of core slots and then winding the magnetic wires (W); a second step of moving the magnetic wires (W) to a pair of core slots opposite to the first pair of core slots, winding the magnetic wires (W), and moving the magnetic wires (W) to the GND winding; a third step of moving the magnetic wires (W) from the GND winding to any second pair of core slots across which the magnetic wires (W) are wound at the first and second steps, and then winding the magnetic wires (W); a fourth step of moving the magnetic wires (W) to a pair of core slots opposite to the second pair of core slots, winding the magnetic wires (W), moving the magnetic wires (W) to any B-phase winding across which the magnetic wires (W) are not wound at the first to third steps, and then cutting the magnetic wires (W); a fifth step of moving the magnetic wires (W) from any C-phase winding across which the magnetic wires (W) are not wound at the first to fourth steps to any third pair of core slots across which the magnetic wires (W) are wound at the first to fourth steps, and then winding the magnetic wires (W); and a sixth step of moving the magnetic wires (W) to a pair of core slots opposite to the third pair of core slots, winding the magnetic wires (W), passing the magnetic wires (W) through an adjacent core slot connected to the A-phase winding and the B-phase winding, passing the magnetic wires (W) through the ground terminal in an upward direction, moving the magnetic wires (W) to the GND winding, and then cutting the magnetic wires (W).

2. The method of claim 1, wherein the A-, B-, and C-phases are any one of: U-, V-, and W-phases, U-, W-, and V-phases, V-, U-, and W-phases, V-, W-, and U-phases, W-, U-, and V-phases, and W-, V-, and U-phases which are sequentially moved and wound.

3. The method of claim 1, wherein the first pair of core slots are a pair of core slots opposite to a pair of core slots disposed on a left or right side of the ground terminal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows one embodiment of a winding method for a BLDC motor according to the present invention; and

(2) FIG. 2 is a perspective view showing the core of a BLDC motor to which the present invention is applied.

DETAILED DESCRIPTION

(3) Although embodiments of the present invention will be described with reference to the accompanying drawings, this is intended to help to facilitate an easier understanding of the present invention, and the scope of the present invention is not limited thereby.

(4) When a portion is described as including a component throughout the specification, this does not mean that another component is excluded but means that the portion may include another component, unless otherwise specified. Furthermore, when a portion is described as being coupled or connected to another portion, this includes both the case where the former portion is directly coupled or directly connected to the other portion and the case where the former portion is electrically coupled or electrically connected to the other portion with a third portion interposed therebetween.

(5) FIG. 1 shows one embodiment of a winding method for a BLDC motor according to the present invention, and FIG. 2 is a perspective view showing the core of a BLDC motor to which the present invention is applied.

(6) A winding method for a BLDC motor according to the present invention is a method configured to successively wind two magnetic wires W across each core slot and its adjacent core slot (over two pitches) in a brushless direct current (BLDC) motor including a U-phase winding, a V-phase winding, a W-phase winding and a GND winding, 12 core slots, and a ground terminal disposed between any two of the core slots, the method including: a first step of moving the magnetic wires W from any A-phase winding of the phase windings to any first pair of core slots and then winding the magnetic wires W; a second step of moving the magnetic wires W to a pair of core slots opposite to the first pair of core slots, winding the magnetic wires W, and moving the magnetic wires W to the GND winding; a third step of moving the magnetic wires W from the GND winding to any second pair of core slots across which the magnetic wires W are wound at the first and second steps, and then winding the magnetic wires W; a fourth step of moving the magnetic wires W to a pair of core slots opposite to the second pair of core slots, winding the magnetic wires W, moving the magnetic wires W to any B-phase winding across which the magnetic wires W are not wound at the first to third steps, and then cutting the magnetic wires W; a fifth step of moving the magnetic wires W from any C-phase winding across which the magnetic wires W are not wound at the first to fourth steps to any third pair of core slots across which the magnetic wires W are wound at the first to fourth steps, and then winding the magnetic wires W; and a sixth step of moving the magnetic wires W to a pair of core slots opposite to the third pair of core slots, winding the magnetic wires W, passing the magnetic wires W through an adjacent core slot connected to the A-phase winding and the B-phase winding, passing the magnetic wires W through the ground terminal in an upward direction, moving the magnetic wires W to the GND winding, and then cutting the magnetic wires W.

(7) Referring to FIG. 1, the present invention is described using an embodiment in greater detail below. The present invention is directed to a method of successively winding two magnetic wires W across each core slot and its adjacent core slot (over two pitches) in a BLDC motor including a U-phase winding, a V-phase winding, a W-phase winding and a GND winding, 12 core slots, and a ground terminal disposed between any two of the core slots.

(8) Numbers 1, 2, . . . , 12 are sequentially allocated to the core slots according to the sequence in which the core slots are arranged, with the ground terminal being disposed between core slots Nos. 5 and 6.

(9) The winding method may include:

(10) a first step of moving the magnetic wires W from the U-phase winding to core slot No. 11;

(11) a second step of winding the magnetic wires W in a clockwise direction from the core slot No. 11 once;

(12) a third step of moving the magnetic wires W from core slot No. 11 to core slot No. 10 and then winding the magnetic wires W in a counterclockwise direction once;

(13) a fourth step of moving the magnetic wires W from core slot No. 10 to core slot No. 5 and then winding the magnetic wires W in a counterclockwise direction twice;

(14) a fifth step of moving the magnetic wires W from core slot No. 5 to core slot No. 4 and then winding the magnetic wires W in a clockwise direction twice;

(15) a sixth step of moving the magnetic wires W from core slot No. 4 to the GND winding;

(16) a seventh step of moving the magnetic wires W from the GND winding to core slot No. 6;

(17) an eighth step of winding the magnetic wires W in a clockwise direction from core slot No. 6 once;

(18) a ninth step of moving the magnetic wires W from core slot No. 6 to core slot No. 7 and then winding the magnetic wires W in a counterclockwise direction once;

(19) a tenth step of moving the magnetic wires W from core slot No. 7 to core slot No. 12 and then winding the magnetic wires W in a counterclockwise direction once;

(20) an eleventh step of moving the magnetic wires W from core slot No. 12 to core slot No. 1 and then winding the magnetic wires W in a clockwise direction once;

(21) a twelfth step of moving the magnetic wires W from core slot No. 1 to the V-phase winding and then cutting the magnetic wires W;

(22) a thirteenth step of moving the magnetic wires W from the W-phase winding to core slot No. 3;

(23) a fourteenth step of winding the magnetic wires W in a clockwise direction from core slot No. 3 once;

(24) a fifteenth step of moving the magnetic wires W from core slot No. 3 to core slot No. 2 and then winding the magnetic wires W in a counterclockwise direction once;

(25) a sixteenth step of moving the magnetic wires W from core slot No. 2 to core slot No. 9 and then winding the magnetic wires W in a counterclockwise direction twice;

(26) a seventeenth step of moving the magnetic wires W from core slot No. 9 to core slot No. 8 and then winding the magnetic wires W in a clockwise direction once; and

(27) an eighteenth step of moving the magnetic wires W from the core slot No. 8, passing the magnetic wires W through an interval between core slot No. 6 and core slot No. 7, passing the magnetic wires W through an interval between core slot No. 6 and core slot No. 5, moving the magnetic wires W to the GND winding through the ground terminal, and cutting the magnetic wires W.

(28) The above-described numbers (the numbers of the core slots) and the sequence of the U-, V-, and W-phase windings are intended merely to facilitate an understanding of the present invention. The numbers, the sequence of the windings, and the winding directions may vary depending on the settings of an operator. The above-described numbers are not limited thereto.

(29) The method proposed according to the present invention has been described using an example with reference to FIG. 1. When the above-described method is employed, there can be achieved the effect of minimizing the quantity of windings, the effect of minimizing automation cost and time through the effective handling of the copper wire, and the effect of reducing manufacturing cost due to reductions in the height of the coils, the volume of the copper wire, and manufacturing time.

(30) Furthermore, the quantities of windings wound across the core slots are balanced, and thus there can be achieved the effect of improving the performance of the BLDC motor.

(31) Although the embodiments of the present invention have been described with reference to the accompanying drawings, it will be apparent to a person having ordinary knowledge in the art to which the present invention pertains that various applications and modifications may be made without departing from the scope of the present invention based on the foregoing description.