Start and power generation integrated unmanned aerial vehicle miniature hybrid power system and start method

Abstract

The invention belongs to the technical field of hybrid power supply, and discloses a start and power generation integrated unmanned aerial vehicle miniature hybrid power system and a start method. Thesystem comprises a two-stroke piston engine, a start and power generation integrated motor, a position sensor, a motor controller, and a power source, a rotor shaft of the start and power generationintegrated motor is coupled to a crankshaft of the two-stroke piston engine, the motor controller includes a driving circuit, a rectifying circuit, a charge-discharge circuit, a first diode, a seconddiode and a two-way relay, the driving circuit comprises a driving chip, one end of the rectifying circuit is connected with the power source, and the other end of the rectifying circuit is grounded,the output end of the rectifying circuit is connected with the start and power generation integrated motor, the charge-discharge circuit comprises a first super capacitor and a second super capacitor,the first super capacitor is connected with the first diode in series to form a first series circuit, the second super capacitor and the second diode are connected in series to form a second series circuit, and the first series circuit and the second series circuit are connected with the rectifying circuit in parallel. The system has the advantage of reducing start resistance and resistance moment fluctuation.

Description

technical field [0001] The invention relates to the technical field of hybrid power supply, in particular to an unmanned aerial vehicle micro-hybrid power system with integrated starting and starting method. Background technique [0002] Due to its long battery life and strong load capacity, the micro-miniature aviation hybrid power system is a commonly used power system solution for industrial drones. The micro-miniature aviation hybrid power system in the prior art mainly has the following problems: [0003] (1) In an ordinary hybrid power system, the motor is connected to the crankshaft of the engine through a reducer. Through the setting of the reducer, the speed is reduced and the torque is increased. However, since the ignition speed of the engine is generally 3000-4000 rpm, The setting of the reducer leads to a large starting resistance torque, and the fluctuation of the resistance torque is violent, making it difficult to start. At the same time, the setting of the ...

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Problems solved by technology

[0003] (1) In an ordinary hybrid power system, the motor is connected to the crankshaft of the engine through a reducer. Through the setting of the reducer, the speed is reduced and the torque is increased. However, since the ignition speed of the engine is generally 3000-4000 rpm, The setting of the reducer leads to a large starting resistance torque, and the fluctuation of the resistance torque is violent, making it difficult to start. At the same time, the setting of the reducer also has the problems of low reliability, increased self-weight, and low power-to-weight ratio;

[0004] (2) If the reducer in the hybrid power system is removed, although the moment of inertia of the system shaft is increased to a certain extent, due to the existence of the cogging torque of the motor, the fluctuation of the starting resistance and the resistance torque will be further aggravated, and the system will still start. difficulty

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