Drone Motor Magnets
Drone is an unmanned air vehicle which steered by radio equipment or pre-installed control program. Drone Motor Magnets – The world’s first drone was born in the 1920s in order to fulfil the need of war. With the advancement of technology, the performance of drone continued to be improved and widely used in military and civilian use. The military drone can be served to intelligence gathering, electronic countermeasures and surveillance, thus civilian drone can be used to urban surveying, pesticide spraying and power line inspection. The drone can be classified into fixed wing drone, unmanned helicopter and multi-rotor drone according to their structure. As the mainstream platform of the military drones and most of civilian drones, the greatest feature of fixed wing drone is relatively faster flying speed. Unmanned helicopter is regarded as the most flexible drone platform due to the characteristics of vertical take-off and hover. The multi-rotor drone is the preferred platform for the consumer use because of low cost and easy operation. Its flexibility is between the fixed wing drone and unmanned helicopter. MPCO MAGNETICS has collected some experience in drone motor magnet and relevant magnetic assembly for multi-rotor drone.
Drone Motor Introduction
Understanding the specifications of drone motors and how they work is important for any hobbyist. There may come a time when you will want to replace a burned-out motor, upgrade your existing drone motors, or even build a drone. This article serves to help you understand the basics of drone motors so you can pick the best drone motor that meets your requirements and budget.
If you google drone motors, you will come across many articles on this topic. However, I find that most of these simply gloss over the explanation, and only provide a surface level explanation. Hopefully, you will find this article much more informative.
Rotor wing’s speed can be changed by adjusting the speed of each motor, thus achieved changes in lift force and therefore control the flight attitude and position. The current multi-rotor drones are basically utilizes the brushless DC (BLDC) motors. The BLDC motor is composed of the permanent magnet rotor, stator with multipole windings and position sensor, then achieve electronic commuting by replacing traditional contact commutator by semiconductor switching.
The Starting Point – Drone Weight and Frame Size
There are two parameters that determine the drone motor size for your quadcopter:
1. Your quadcopter total weight
2. Your quadcopter frame size
If you are building your drone, you may not know the final weight. However, you can determine the final weight by considering the weight of all of the individual components.
The frame size will let you determine the proper propeller size to use.
Once you know the propeller size and the weight of the drone, you can determine how much thrust the individual drone motor needs to generate to get your quadcopter into the air.
Drone Motor Thrust to Weight Ratio
The thrust to weight ratio TWR = T / W is the main dynamic characteristic that will determine your drone flight profile. To maintain steady flight, your TWR needs to be equal to one (see Figure 1). However, to take off you will need TWR > 1 so you have a net acceleration upwards. When flying, the angle of attack of the drone (ie the tilt angle alpha in Figure 2) causes the thrust vector to have vertical and horizontal components. This requires the TWR to be at least 1.3 for an approximate maximum angle of attack of 40 degrees.
A general rule of thumb is that the drone motors should be able to provide twice as much thrust as the weight of the drone. If the thrust provided by the motors is too little, you will experience poor flight performance. If you have 4 motors, and want to achieve a TWR of 2, then each motor needs to produce thrust that is equal to half of the drone weight.
Drone Motor Summary
In this article, we discussed the various specifications of drone motors, and some of the things you need to know when sizing a drone motor for your quadcopter. Hopefully this has helped you gain a better understanding of drone propulsion systems, and the ability to calculate flight times based on the battery size, and the amount of thrust needed to fly your drone.
Progress in Drone Motor Magnet
Drone motor magnet has the certain progress recently. Aichi Steel utilizes their advanced and creative injection molding process to realize 30% weight reduction compared to the conventional motor design. Thus support increased carrying capacity and flight time. Some users also adopt radially oriented ring magnet to instead arc shape magnets base on many advantages they claimed.