Fault Diagnosis of Induction Motors Using Recurrence Quantification Analysis and LSTM with Weighted BN

Table 1

Motors with 8 fault types in tests.

Fault condition	Abbreviations	Class	Description
Normal	NO	1	Healthy state
Broken rotor bars	BB	2	Fitted with an already broken rotor bar
Bowed rotor	BR	3	Consists of a centrally intentionally bent rotor
Rotor misalignment	RM	4	Caused by custom-machined end bells with asymmetric structure
Stator winding faults	SW	5	Copper wires around the stator with shorted stator winding turns
Voltage unbalance and single phasing	VP	6	Controlled by the control console to disrupt voltage balance and to disconnect one phase
Rotor unbalance	RU	7	Intentionally removing one of the balanced rotors from induction motor and destroying the inner balance
Faulted bearings	FB	8	Composed of one inner race faulted bearing and one outer race faulted bearing