Principles of Operation

High-Voltage Converter/Inverter

Principles of Operation

DC/AC Inverter and AC Power Point

The 110 volts AC created by the inverter will measure differently than a conventional AC outlet (utility-generated) with some multi-meters. The power point will automatically shut off if the load exceeds 150 watts. This prevents damage to the inverter or load. The inverter supplies 110 volts AC power only when the key is in the ON/START position. This reduces the draw on the 12-volt system when the vehicle is not running. The DC/AC inverter outlet (AC power point) is equipped with a green LED that indicates the system integrity. The green LED illuminates continuously when the key is in the ON/START position and the system is operating normally. The green LED flashes constantly if the key is in the ON/START position and a fault is detected. Short circuits, overloads or overheating of the inverter will cause the green LED to flash and the power to be cut off to the outlet. If the LED is flashing, the problem must be corrected (short circuit or excessive load). If the inverter is overheated, it must be allowed time to cool off (without the load connected). Refer to Owner's Literature for a list of appropriate electrical loads/devices that can be used.

DC/DC Converter

The DC/DC converter is a liquid-cooled component that converts high voltage (216-397 volts) DC power to low voltage (12 volts) DC power, while maintaining electrical isolation between the 2 DC power systems. The converter steps down the high voltage to 12 volts, providing power to the vehicle low voltage battery systems, charging the vehicle's 12-volt battery, and eliminating the need for a conventional engine-driven generator. The PCM controls the operation of the DC/DC converter through an enable input from the PCM to the DC/DC converter.

The DC/DC converter is liquid-cooled and is part of the Motor Electronics Cooling System (MECS). In addition to the DC/DC converter, the MECS also provides cooling of the Electronically Controlled Continuously Variable Transmission (eCVT). For more information on the MECS, refer to Transmission Cooler, A/T.