Integrated UAV Propulsion System (Electromagnetic Compatibility Version)

Electromagnetic environment challenges  for UAVs - An invisible killer

We always ignore the drone crushcaused by electromagnetic interference.

The drone self check is ok and the the airborne equipment is ok. However, the signal is loss suddenly and the drone is out of control when taking-off and cruising . It happens occasionally when the drone is performing flight operations. The first reaction for most of us is that there is something wrong with the hardware, but they don’t know an invisible killer - environment-electromagnetic interference in some flying environment.

Electromagnetic interference sources generally exist in the natural environment, high-voltage transmission lines, industrial radio frequency equipment, communication base stations and radars, etc. The existence may cause serious interference risks to the normal operation of the UAV system and these application environments are very universal.

What is EMC (Electromagnetic Compatibility) ?

Electromagnetic compatibility refers to the ability of a device or system to operate in compliance with the requirements in its electromagnetic environment without causing unbearable electromagnetic interference to any equipment in its environment. It includes EMI and EMS.

EMI is the electromagnetic interference of electronic and electrical products to the surrounding external environment. EMI includes space radiation wireless interference and conducted wired interference; EMS is the sensitivity of electronic and electrical products to electromagnetic interference when they work in a certain electromagnetic environment.

In short, EMI is to make the electromagnetic interference of the product to the outside world less than a certain range when it is working, and EMS is to make the product can tolerate a certain limit of interference from the outside world when it is working.

Application Scenario and Standard Requirements

With the progress and development of drones, as a production tool,the commercial market  has penetrated more and more industries and application scenarios such as surveying, mapping exploration, agricultural plant protection and cargo transportation have gradually matured, but its complex electromagnetic operating environment also requires us to pay attention.

In terms of special applications, military vehicle-mounted drones have also become a highlight of their applications. Facing the complex man-made electromagnetic environment on the battlefield, drones should not stop due to the interference of the electromagnetic environment they are in and even not be exposed because of their own electromagnetic radiation. The safe execution of tasks is particularly critical, which requires our drones to have relatively strict electromagnetic compatibility requirements.

Refer to GJB151B-2013 (partial indicators) as follows:

EMI:

• RE102 --- 10KHz ~ 18GHz electric field radiation emission

• CE102 --- 10KHz ~10MHz power line conducted emission

EMS:

• RS101 --- 25KHz ~ 100KHz magnetic field radiation sensitivity

• RS103 --- 10KHz ~ 40GHz electric field radiation sensitivity

• CS101 --- 25Hz ~ 150KHz power line conduction sensitivity

In combination with the actual needs of users, our company has successfully developed a set of solution with the motor, ESC to the overall integrated structure and has practical applications. This solution can meet the needs of drones used in special electromagnetic scenarios.

For more information about this case or users who have related UAV power system needs, please contact us for consultation.