Mathematical Modeling and Analysis of an Electro-Hydrostatic Servo- Actuator with Brushless d.c. Motor
نویسنده
چکیده
In this paper one presents an electro-hydrostatic servo-actuator (EHA) driven by a brushless d.c. motor. The constructive solution studied here was chosen due to the current trends in making All-Electric Aircraft (AEA). EHA contains two subsystems: the electrical subsystem and the hydraulic subsystem. The hydraulic subsystem is composed by a local gear pump, a hydraulic cylinder with bilateral rod, a hydro-accumulator which has also the role of tank and discharge valves. The electric subsystem contains a three-phase inverter which feeds the pumps brushless motor and also commands and controls the motor. The advantages of the EHA actuators were already proven and experimentally validated and they are already used on aircraft serial. In other papers were presented studies on EHA with d.c. motor driven pump. The motor was fed by a d.c. to d.c. Buck converter. One considered the brushless motor due to its big starting torque contributing to a shorter time response for the servo-actuator and also due to its high reliability in the absence of the brushes. Modern Computer Applications in Science and Education ISBN: 978-960-474-363-6 157
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