AE-X15PU
2 – 11
3.1.2 DC over current detection circuit
When a current of about 20 A or higher flows through the shunt resistance [AE-X15PU(R230～R234), AE-X18PU/AE-X24PU(R230～R235)] on the
control printed wiring board (PWB), the voltage at this resistance is input to IPM CIN pin (15). Then, the gate voltage of the lower-phase IGBT (LU,
LV, LW) inside the IPM turns OFF to cut off the over current. At the same time, an L output of more than 20μs is generated from IPM from pin (14),
and this results in an L input to over current detection input pin (17) of the microcomputer (IC1) and turns OFF the PWM signal output (IC1 pins (20)
through (25)) to the IGBT gate.
AE-X15PU(R230～R234),
AE-X18PU/AE-X24PU(R230～R235)
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