Brushless pump motor system

Patent metadata

Field	Value
Publication number	US-10400758-B2
Application number	US-201615241667-A
Country	US
Kind code	B2
Filing date	Aug 19, 2016
Priority date	Jun 1, 2015
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

Systems and methods can control a pumping system. Operating characteristics of a driving apparatus are obtained. The driving apparatus is operatively coupled to a pump and operates to effect operation of the pump. Additionally, instructions are provided to an electronic speed controller. In particular, the instructions direct the electronic speed controller to control activity of the driving apparatus.

First claim

What is claimed is:

1. An unmanned aerial vehicle (UAV) comprising:
a housing forming a central body of the UAV;
an altitude sensor;
a processor coupled to a memory and configured to receive sensing data from the altitude sensor; and
a pumping system that is mounted to the central body of the UAV, the pumping system comprising:
a pump; and
a brushless motor, wherein the brushless motor:
is operatively coupled to the pump and operates to effect operation of the pump; and
is configured to drive the pump to expel spraying fluid at a first speed in response to the UAV being above a threshold altitude and at a second speed in response to the UAV being below the threshold altitude, the first speed being higher than the second speed.

2. The vehicle of claim 1 , wherein the brushless motor is physically coupled to the pump.

3. The vehicle of claim 1 , wherein the brushless motor and the pump form a single unit.

4. The vehicle of claim 1 , wherein the pump is communicatively coupled to a sprayer.

5. The vehicle of claim 4 , wherein the sprayer is a pesticide sprayer.

6. The vehicle of claim 4 , wherein:
the sprayer comprises a plurality of fluid outlets; and
the pump is configured to expel the spraying liquid from an increased number of the plurality of fluid outlets in response to the UAV gaining altitude.

7. The vehicle of claim 1 , wherein the torque and rotating speed of the brushless motor satisfies requirements of the pump.

8. The vehicle of claim 1 , wherein an electronic speed controller controls the brushless motor.

9. The vehicle of claim 8 , wherein the electronic speed controller is based on a field oriented control.

10. The vehicle of claim 8 , wherein the electronic speed controller is integrated into the brushless motor.

11. The vehicle of claim 8 , wherein the electronic speed controller controls a speed of the brushless motor.

12. The vehicle of claim 11 , wherein the electronic speed controller controls the speed of the brushless motor based on calculated operating characteristics of the brushless motor.

13. The vehicle of claim 8 , wherein responsiveness of the brushless motor is shorter when controlled by the electronic speed controller as compared to responsiveness of the brushless motor when not controlled by the electronic speed controller.

14. The vehicle of claim 1 , wherein an electronic speed controller controls the pump.

15. The vehicle of claim 14 , wherein the electronic speed controller controls a volume of fluid that is pumped through the pump.

16. The vehicle of claim 14 , wherein the electronic speed controller controls a pressure of fluid that is pumped through the pump.

17. The vehicle of claim 1 , further comprising a payload carried beneath the central body.

18. The vehicle of claim 17 , wherein the payload is movable relative to the central body.

19. The vehicle of claim 1 , wherein the brushless motor is capable of being selectively operably decoupled from the pump.

20. The vehicle of claim 1 , wherein the pumping system is mounted within the housing.

Assignees

• Sz Dji Technology Co Ltd

Inventors

• Bei Shimeng
• Wu Xumin
• Ao Jiyuan
• Guan Yijun
• Wu Xiaolong

Classifications

• F04D15/0066

  by changing the speed, e.g. of the driving engine · CPC title

• F04B2203/0209

  Rotational speed · CPC title

• F04B49/103

  Responsive to speed · CPC title

• F04B49/065

  and making use of computers · CPC title

• B64D1/18

  by spraying, e.g. insecticides · CPC title