| Autor: |
Carev, Vadim, Alloyarov, Konstantin, Kaychenov, Aleksandr, Kaliaskarov, Nurbol |
| Předmět: |
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| Zdroj: |
International Review of Aerospace Engineering; Feb2024, Vol. 17 Issue 1, p12-18, 7p |
| Abstrakt: |
The development of Unmanned Aerial Vehicles (UAV) is impossible without optimizing Brushless Direct Current (BLDC) systems and increasing their specific power. To enhance power, it is logical to raise the operating voltage while reducing the current and heat dissipation of the stator. However, the impedance of the stator windings and their inductance restrict the use of higher operating voltage. High-voltage BLDC motors struggle to operate efficiently at low speeds due to excessively short Pulse-Width Modulation (PWM) pulses resulting in significant thermal losses on the output FET transistors. Current solutions, such as electromechanical switches designed for low operating current or based on a single cascade, have low efficiency in practice. This article presents the design of a new high power electronic battery switch that enables the efficient utilization of high voltage BLDC motors at any speed in dynamic mode. This leads to a notable increase in the operating time of the BLDC motor from a single battery charge without the need for extra batteries or recharging existing ones. Given that modern Li-Pol batteries are costly and have a limited charge-discharge cycle lifespan, electronic battery switches allow for their integration into finished products to extend battery life and reduce the final cost of BLDC systems. Specifically, it allows the UAV to stay airborne for much longer or the use of batteries with lower capacity and weight. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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