The variable frequency drive has been adopted to solve the problems of smooth starting and imbalance of multi-driving for the armoured face conveyor recently. In order to take full advantage of this soft start method, the obtaining of frequency control strategy and the systematic dynamic analysis should be combined. The electromechanical model of the variable frequency motor is established according to the mechanical characteristic curve and the chain transmission system is discretized into multiply Kelvin-Vogit models. The systematic electromechanical model of an armoured face conveyor is established by Matlab/Simulink. Then, the effect of the variable frequency drive on the dynamic behaviors of the chain transmission system is analyzed, and the performance evaluation index of the soft start is introduced. A numerical simulation about the SGZ1000/2×1000 conveyer on the full loading condition is provided as an example. The influence of control parameters on the starting process is analyzed, and an optimal control strategy is obtained. After compared with the system driven by the motor and hydraulic coupling under the same working condition, it can be concluded that reasonable control parameters can obviously improve the soft start performances, ensure a smooth startup, reduce mechanical impact, achieve the power balance of multi-driving, and solve the startup problems under heavy loads.
LI Yang
,
HE Baiyan
,
YUAN Pengfei
,
NIE Rui
,
LI Guoping
. Variable Frequency Drive and Transmission System of the Heavy Armoured Face Conveyor[J]. Journal of Mechanical Engineering, 2018
, 54(3)
: 8
-17
.
DOI: 10.3901/JME.2018.03.008
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