A high and low voltage compatible built-in brushless DC generator system

Abstract

The invention discloses a high-voltage and low-voltage compatible built-in brushless DC generator system, which belongs to the technical field of aerospace electrical design and manufacture. The starting and generating system includes a brushless generator, a starter controller and a generator controller. The brushless generator is built into the engine and directly connected to the engine rotating mechanism; the brushless generator is used as a starter and works when the engine is started. In the electric state, drag the engine to the ignition speed and assist after ignition. After the engine is ignited, it will be used as a generator and work in the power generation state; the start controller is used to drive and control the electric operation of the generator. During the engine start stage, the start control The generator drive controls the motor to drag the engine from static to the speed required for engine ignition, and assists the engine to run. After reaching the required speed, the electric drive control of the motor is automatically stopped; the power generation controller rectifies the three-phase alternating current output by the generator into 28.5V DC to power the load on the drone.

Description

technical field [0001] The invention belongs to the technical field of aerospace electrical design and manufacture, and in particular relates to a generator system for a turbofan engine used in an unmanned aerial vehicle. Background technique [0002] The power devices for small and medium-sized high-speed UAVs are mainly turbojet and turbofan engines. The starting methods of turbofan engines are divided into air starting and ground starting. In-air starting is a conventional starting method for missiles. Generally, gunpowder starters and pyrotechnic igniters are used. When pyrotechnics work, the impact on the engine is relatively large, and this starting method has an impact on the life of the engine. The common way to start the UAV is the ground start. The common way to start the ground is to blow the high-pressure air source to turn the engine to the ignition speed, and the engine is ignited to start. This kind of starting method needs to be equipped with a ground air s...

AI Technical Summary

Problems solved by technology

This kind of starting method needs to be equipped with a ground air source vehicle and provide high-pressure air source and air source vehicle booster equipment. The guarantee equipment is complex and bulky. After the engine is started, the air source vehicle needs to be manually disengaged.

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