Switched Reluctance Motor Inductance Test
Switched Reluctance Motor Inductance Test
(OP)
Dear All,
I have done an inductance and winding resistance test for 75 KW SRM Motor. How could I determine whether the motor is in good condition or not based on the Inductance test result. The test has been done offline.
1) Inductance test at 100 HZ using LCR Meter :
A1-A2 @ 100Hz Lmin = 0.93
A1-A2 @ 100Hz Lmax = 4.38
A phase Lmax/Lmin Ratio = 4.38/0.93
B1-B2 @ 100Hz Lmin = 1.63
B1-B2 @ 100Hz Lmax = 5.24
B phase Lmax/Lmin Ratio = 5.24/1.63
C1-C2 @ 100Hz Lmin = 0.44
C1-C2 @ 100Hz Lmax = 0.48
C phase Lmax/Lmin Ratio = 0.48/0.44
2) Insulation Resistance Test at 1000 V:
A1 or A2 to earth = 0.8 GΩ
B1 or B2 to earth = 0.9 GΩ
C1 or C2 to earth = 0.9 GΩ
A1 –B1 = 2.2 GΩ
A1 –B1 = 2.1 GΩ
A1 –B1 = 2.2 GΩ
3) Winding Resistance Test :
A1 - A2 = 0.4 Ω
B1 - B2 = 0.3 Ω
C1 - C2 = 0.3 Ω
Thank you.
I have done an inductance and winding resistance test for 75 KW SRM Motor. How could I determine whether the motor is in good condition or not based on the Inductance test result. The test has been done offline.
1) Inductance test at 100 HZ using LCR Meter :
A1-A2 @ 100Hz Lmin = 0.93
A1-A2 @ 100Hz Lmax = 4.38
A phase Lmax/Lmin Ratio = 4.38/0.93
B1-B2 @ 100Hz Lmin = 1.63
B1-B2 @ 100Hz Lmax = 5.24
B phase Lmax/Lmin Ratio = 5.24/1.63
C1-C2 @ 100Hz Lmin = 0.44
C1-C2 @ 100Hz Lmax = 0.48
C phase Lmax/Lmin Ratio = 0.48/0.44
2) Insulation Resistance Test at 1000 V:
A1 or A2 to earth = 0.8 GΩ
B1 or B2 to earth = 0.9 GΩ
C1 or C2 to earth = 0.9 GΩ
A1 –B1 = 2.2 GΩ
A1 –B1 = 2.1 GΩ
A1 –B1 = 2.2 GΩ
3) Winding Resistance Test :
A1 - A2 = 0.4 Ω
B1 - B2 = 0.3 Ω
C1 - C2 = 0.3 Ω
Thank you.





RE: Switched Reluctance Motor Inductance Test
Was the test performed on an assembled motor, or with the rotor removed?
John
RE: Switched Reluctance Motor Inductance Test
RE: Switched Reluctance Motor Inductance Test
RE: Switched Reluctance Motor Inductance Test
John
RE: Switched Reluctance Motor Inductance Test
Applications’’. The range of the ratio between unaligned and aligned inductance should be 0.07 < Lmin/Lmax < 0.18 which Lmin is unaligned and Lmax is aligned rotor. Can it be used as reference since we don't know the rotor position?
RE: Switched Reluctance Motor Inductance Test
Watch your LCR meter as you rotate the motor slightly between rotor bars you will see quite a change, I think in
EE speak this is called "Q" factor however I agree with previous replies, position of rotor is significant.
Chuck