A high-efficiency control system and control method for a brushless motor with a wide working range

Abstract

The invention discloses a high-efficiency control system and a control method of a brushless motor with a wide working area, which are used in energy systems of aerospace vehicles. The system of the present invention includes a power supply module, a first DC-DC circuit, a battery pack, a second DC-DC circuit, an anti-reverse circuit, ESC, BLDC, an airborne controller, and a communication link. The electric energy from the power supply module charges the battery pack through the first DC-DC circuit, the electric energy of the battery pack passes through the second DC-DC circuit in turn, and the anti-reverse circuit supplies power to the ESC, wherein the output voltage of the second DC-DC circuit, the ESC The throttle signal input is controlled in real time by the on-board controller according to the power demand of the aircraft; the high-efficiency control system of the brushless motor with a wide working range of the present invention is suitable for the control of brushless motors with a large power demand range such as long-endurance drones. The system can realize the efficient power output of the whole power system in a 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 betwe...

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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