DC Link Overcurrent / IPM Alarm

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An overcurrent condition is detected in the DC link of the converter, or an alarm is issued by the IPM (Intelligent Power Module). This usually indicates a short circuit in the motor, power module failure, or sudden high load.

• Short circuit in the motor or motor cabling.
• Faulty IPM (Intelligent Power Module) in the spindle amplifier.
• DC link capacitor failure.
• Overload condition causing excessive current draw.
• Ground fault in the motor or power leads.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Measure the resistance between motor phases (U, V, W) and ground.

2. 2

   Inspect the spindle motor power cables for signs of damage or insulation breakdown.

3. 3

   Check the DC link voltage (P+, P-) for stability under load.

4. 4

   Verify that the braking resistor circuit is functioning correctly.

5. 5

   Run a low-speed motor test while monitoring DC link current.