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Home >> Infiniti >> 2017 >> Q70 Hybrid >> Repair and Diagnosis >> Electrical >> Body Electrical >> Traction Motor System >> System Description >> System >> Traction Motor Inverter >> Protection Control

Protection Control

Traction motor inverter, when its status is as shown in the following table, enters a protective control state in order to protect the system. It automatically returns to the normal state when safety is ensured.

Condition Control Normal return condition
Traction motor is in the state of extremely low revolution and high torque IGBT switching frequency is reduced.
NOTE:

Traction motor electromagnetic noise increases.
  • Traction motor torque decreases
  • Traction motor speed increases
IGBT is overheated Traction motor output torque is limited according to the IGBT temperature. IGBT temperature drops
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