A tethered UAV airborne multi-motor series power supply circuit

Abstract

The invention discloses a tethered unmanned aerial vehicle-mounted multi-motor series connection power supply circuit, including a high-voltage DC bus; several stages of DC step-down circuits with similar structures, and each stage of the DC step-down circuit is composed of a capacitor bridge arm, Composed of switching tube bridge arm and inductor; low voltage DC voltage output. The on-off state of the switch tubes in the bridge arms of the switch tubes is controlled by the drive circuit, and the inductance is used as the energy transfer medium to charge and discharge the capacitor bridge arms, and finally realize the conversion of the high-voltage DC power supply into multiple Low-voltage DC power supply, thus serving as the power supply for each motor drive circuit. The circuit of the invention is simple and easy to implement, has lower requirements on the withstand voltage of the device, a larger selection range of the device, and lower cost, and can reduce the self-weight of the drone so that it has a greater load capacity.

Description

technical field [0001] The invention relates to the field of tethered unmanned aerial vehicles. More specifically, the present invention relates to a multi-motor series power supply circuit for tethering an unmanned aerial vehicle. Background technique [0002] The tethered UAV is a kind of UAV with great development prospects. When the tethered drone is working, it needs to connect the drone and the ground power supply through a transmission cable to provide real-time power to the drone. In order to reduce the quality of the transmission cable and reduce the loss on the transmission cable, the ground power supply generally supplies high-voltage direct current. However, high voltage has higher requirements on the insulation and withstand voltage level of the motor that drives the UAV propeller and the power circuit that drives the motor, so there are fewer optional components, the cost is higher, and it will increase the self-weight of the UAV. , leading to a reduction in...

AI Technical Summary

Problems solved by technology

However, high voltage has higher requirements on the insulation and withstand voltage level of the motor that drives the propeller of the UAV and the power circuit that drives the motor, so there are fewer optional components, the cost is higher, and it will increase the weight of the UAV. , leading to a reduction in the load capacity of the UAV, which has great limitations

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