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Check List

Step 4

Figure 15: The multimeter

should show diode open

IGBT static test

Step 1

Figure 16: The multimeter

should show diode open

Step 2

Figure 17: The multimeter

should show the diode drop

of around 0.4 volt on the

three terminals

Step 3

Figure 18: The multimeter

should show open diode

Static test procedures

Now reverse the meter leads, i.e. connect the

negative terminal of the meter lead to the

negative DC bus.

Note: A diode drop reading will vary depending on the model of the ohm meter

IGBT's are placed on the output of the CDS drives

• Connect the positive terminal of the multimeter

lead to the positive DC bus.

Now reverse the meter leads, i.e. connect the

negative terminal of the meter lead to the

positive DC bus.

Now repeat the procedure by connecting to the

negative DC bus in order to test the second set

of IGBTs.

• Connect the positive terminal of the meter lead

to the input terminals L1, L2, L3 in turn.

• The multimeter should show diode open.

• Connect the negative terminal of the

multimeter lead to the motor terminal U, V, W

in turn.

• The multimeter should show the diode open.

• Connect the positive terminal of the meter lead

to the motor terminals U, V, W in turn.

• The multimeter should show the diode drop

of around 0.4 volt on the three terminals.

• Connect the negative terminal of the

multimeter lead to the negative DC bus.

• Connect the positive terminal of the multimeter

lead to the motor terminal U, V, W in turn.

• The multimeter should show open diode.

FRCC.PC.036.A2.02