Wide-working-area brushless motor efficient control system and control method

Abstract

The invention discloses a wide-working-domain brushless motor efficient control system and a control method, which are used for an aerospace vehicle energy system. The system comprises a power supplymodule, a first DC-DC circuit, a battery pack, a second DC-DC circuit, an anti-reverse circuit, an ESC, a BLDC, an airborne controller and a communication link. Electric energy from the power supply module charges the battery pack through the first DC-DC circuit. The electric energy of the battery pack supplies power to the ESC through the second DC-DC circuit and the anti-reverse circuit in sequence, and the output voltage of the second DC-DC circuit and the accelerator signal input of the ESC are controlled in real time by the airborne controller according to the power demand of the aircraft. The wide-working-domain brushless motor efficient control system is suitable for brushless motor control systems with large power requirement ranges such as long-endurance unmanned aerial vehicles,and efficient power output of the whole power system can be kept in the wide working area.

Description

technical field [0001] The invention belongs to the technical field of aerospace vehicle energy systems, and in particular relates to a high-efficiency control system and control method for a brushless motor with a wide working range. Background technique [0002] For some specific brushless power systems (such as long-endurance electric UAVs and tilting electric UAVs that can take off and land vertically), they require a large working area. However, the control of traditional constant voltage drives It is difficult to achieve efficient power output in a wide working range. For example: for long-endurance electric drones, the power required for the cruising phase is low, less than 1 / 4 of the rated power of the brushless DC motor (BLDC), which deviates from the high-efficiency range of the power system; for vertical take-off and landing Tilting electric drones use the same set of power devices for vertical takeoff and horizontal cruise, and the power value gap required bet...

AI Technical Summary

Problems solved by technology

[0002] For some specific brushless power systems (such as long-endurance electric UAVs and tilting electric UAVs that can take off and land vertically), they require a large working area. However, the control of traditional constant voltage drives It is difficult to achieve efficient power output in a wide working range

For example: for long-endurance electric drones, the power required for the cruising phase is low, less than 1 / 4 of the rated power of the brushless DC motor (BLDC), which deviates from the high-efficiency range of the power system; for vertical take-off and landing Tilting electric drones use the same set of power devices for vertical takeoff and horizontal cruise, and the power value gap required between the two working states is huge. If the traditional constant voltage drive method is used, the system is usually determined to meet the requirements of vertical takeoff. Working voltage, which also leads to the inefficiency of the power system of this type of UAV when it is flying horizontally

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