Sevcon Gen4 Size 8 Manual -

AC motor controller, a rugged high-power inverter designed for demanding electric vehicle (EV) and industrial applications. Gen4 Size 8

(Describe as per manual Figure 12) Battery → Main contactor (precharge circuit via resistor) → B+ terminal. B- direct to battery. Motor phases M1, M2, M3 → motor terminals U, V, W. Enable line from key switch to pin 5, with interlock contactor feedback. sevcon gen4 size 8 manual

The manual explains the thermal model. At 85°C heat sink temp, the controller begins “foldback”—reducing current limit linearly. At 95°C, output stops entirely. This is not a fault; it is protection. The manual cautions against disabling foldback via software, as it voids the UL listing. AC motor controller, a rugged high-power inverter designed