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Direct drive ceiling fan

A technology for driving ceiling fans and ceiling fans, which is applied in the field of direct-drive ceiling fans, and can solve the problems of high-torque motors amplifying noise

Inactive Publication Date: 2017-06-16
PHASE IND DESIGN NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high torque motors will amplify the noise if the radial force (Fx, Fy) is greater than zero

Method used

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  • Direct drive ceiling fan
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Figure 4A Shown is a stator according to a first embodiment and a stator winding pattern with a symmetrical winding configuration. The stator is used in a PMSM with 63 slot structures (the slots are numbered 1-63 individually and consecutively along the circumference of the stator for reference) and 70 slot poles. It can be seen that the value of q in the equation is less than 1:

[0073]

[0074] More specifically, 63÷70÷3=3 / 10. The wire is used to form a coil around each tooth of the stator, and it is a copper wire with a diameter of 0.9mm, with an enamelled insulation grade of G2 and a temperature resistance index of 180°C. Each coil on the stator consists of 110 turns of wire. The winding directions of each of the 63 coils of the stator are shown in Table 2 below and explained in detail below. numbered in table 2 below and in Figure 4A The 63 coils shown in , starting from coil 101, are respectively consecutively numbered to the 63rd coil, ie, coil 163.

...

Embodiment 2

[0088] Following the method and discussion of Example 1, Figure 5A Another example of a stator is shown that can also be used with a 70 pole rotor to provide a PMSM. Such as Figure 5A As shown, the stator 200 includes sixty (60) teeth 270 separated by sixty (60) slots 201 - 260 , with an exemplary number marked therein. Each tooth 270 is wound by a U-phase conductor, or a V-phase conductor, or a W-phase conductor according to the q1 winding pattern shown in Table 1 . The rotor is a 70-pole rotor, specifically, as Figure 5B The rotor 292 shown, the resulting motor is a PMSM, which generates almost zero radial force during operation. Figure 5A The winding patterns of the stator shown include the symmetrical winding patterns shown in Table 3 below. For simplicity, Table 3 only shows the winding pattern for the first phase (U phase) of the 3-phase motor. There are 60 coils, and the U-phase coil includes two coils every three groups, specifically, one group includes coils ...

Embodiment 3

[0094] Following the method and discussion of Example 1, Figure 6A A stator comprising 54 symmetrically wound teeth is shown for use with a 66-pole rotor to form a PMSM that exhibits almost zero radial force. Every third wire, one for each phase, is wound on a corresponding set of teeth. The winding pattern follows the q3 winding pattern shown in Table 1 above. The fifty-four teeth (54) of the stator 400 are wound individually and continuously to form coils designated 501-554, in Figure 6A The example numbers of the coils are marked in . The fifty-four slots (54) of the stator 400 are individually and consecutively designated 401-454, at Figure 6A The example number of the slot is marked in . The winding pattern for the U-phase conductor is shown in Table 4 below. The U-phase, V-phase, and W-phase described here are respectively equivalent to the A-phase, B-phase, and C-phase referred to in the winding mode shown in Table 1 above.

[0095] Table 4

[0096]

[0097...

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Abstract

A direct drive ceiling fan is described that includes at least one blade and a permanent magnet motor (e.g., PMSM) as a driving source. The permanent magnet motor includes a stator with a slot construction with a predetermined number of slots and multiple stator windings, and a rotor assembly including magnet steel that has a predetermined number of magnetic poles and being mounted directly with a rotating shaft of the ceiling fan. The coils are wound according to a symmetric winding pattern that is selected based on the numbers of slots and poles used in the motor. The resulting motor produces near zero to zero radial forces (Fx and Fy) during operation of the fan.

Description

technical field [0001] This invention relates to ceiling fans, and more particularly to direct drive ceiling fans. More specifically, the present invention relates to direct drive ceiling fans particularly useful in the high volume air flow range. Background technique [0002] Current high capacity fans, some with air flow ranges in excess of 300,000 cubic feet per minute, like 24 foot blade models, are used in commercial industries such as poultry processing due to their size. However, when ceiling fans get large and handle high volume airflows in the range of over 50,000 cubic feet per minute, drive without gearing and therefore without gearing noise, and without noise from motor vibration The capacity of these fans becomes a technical challenge. In this way, the current industry conclusion is that such a large fan cannot be driven by a direct drive permanent magnet motor (such as a permanent magnet synchronous motor PMSM) with a stable and non-vibrating performance as u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/08H02K1/16H02K1/27H02K3/28H02K21/22
CPCF04D25/0633F04D25/064F04D25/0646F04D25/088H02K1/16H02K1/2786H02K3/28H02K21/22H02K2213/03H02K9/227H02K29/03F04D25/06F04D29/053H02K1/2706H02K5/04
Inventor 杜世雄
Owner PHASE IND DESIGN NINGBO
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