Decoupling start control method for aircraft wound‐rotor synchronous starter‐generator based on main field current estimation

Abstract

Wound-rotor synchronous starter-generator (WRSSG) has the advantages of less volume and weight, high safety and low cost in maintenance, so it is becoming increasingly popular in modern aircraft, especially for more-electric aircraft. The main machine (MM) and main exciter (ME) of the aircraft WRSSG are electromechanically coupled seriously, which makes the start control for the WRSSG complex in the starting mode. In this study, a decoupling start control method for aircraft WRSSG based on main field current estimation is proposed to solve the serious coupling problem and improve start control performance. In the proposed decoupling control method, the main field current is estimated first and used in the closed-loop excitation control for the ME to make the main field current meet the MM demand. With the desired field current, the MM is decoupled with the ME and controlled like a traditional synchronous motor to start the aircraft engine under maximum torque per ampere. The feasibility and effectiveness of the proposed decoupling control method is verified by experimental results.

Intelligent Fault-Tolerant Control for AC/DC Hybrid Power System of More Electric Aircraft

“…In the following subsection, GWO is used to realize the multi-objective optimization for aircraft engine by searching the optimal control designable parameters in (11).…”

“…Moreover, it is clear that k should be large enough to deal with the influence of lumped disturbance. However, large k increases the value of control signal, as shown in the control law (11). Thus, σ 1 , σ 2 , q 1 , q 2 , k 1 , and k 2 are key parameters in controller for obtaining the minimum performance indexes (12).…”

“…Consider that the dynamic of aircraft engine is much slower than that of AC/DC, the optimization of aircraft engine control law is separated from that of AC/DC in the simulation. After obtaining the optimized aircraft engine intelligent SMFTC law (11) according to Figure 4, the whole MEA power control system is optimized by GWO on the basis of Figure 9.…”

“…On the basis of adaptive observer, Reference [10] proposed a faulttolerant control (FTC) method for aircraft engines with sensor faults and actuator faults. Reference [11] used the method of decoupling start control for aircraft wound-rotor synchronous starter-generator and achieved good results. Reference [12] established a model of high-voltage direct current (HVDC) power generation system and proposed a double closed-loop feedback voltage regulator technology in MEA.…”

Stabilization of nonlinear PMSG-based wind energy conversion system via coupling memory sampled-data control with a membership function-dependent $ H_{\infty} $-approach

“…Thus, VSWT is used in this study because it can perform better than the fixed speed wind turbine. For this, several kinds of VSWT generators such as squirrel cage induction generator (SCIG) [10], doubly-fed induction generators (DFIG) [11], permanent magnet synchronous generator (PMSG) [12], and wound synchronous rotor generator (WRSG) [13], have been developed and studied by the researchers. Among the classes of wind generators, the PMSG has been identified as superior, because of its benefits, like high power density, better performance, less operational noise, the external excitation current is not required, and no losses are generated in the rotor [14][15][16].…”