Vanner begins production of IAP2 accessory electrification system for Allison’s hybrid eGen Flex in 90 GILLIG hybrid buses

Aug 19, 2023

Santa Clara Valley Transportation Authority (VTA) will be receiving more than 90 GILLIG electric hybrid buses equipped with Vanner’s Increase Accessory Power 2 (IAP2). IAP2 will provide total accessory electrification, powering air conditioning, air compressor, electric fans and all 12V/24V loads.

Vanner’s IAP2 provides 100% of the accessory electrification for Allison Transmission’s eGen Flex 40/50 and eGen Flex 40/50 Max Electric Hybrid Propulsion Systems by eliminating the belt-driven and hydraulic accessories in the rear bay of the vehicle.

All vehicle accessories are powered by the electric hybrid propulsion system and function independently of vehicle operation. This allows for full operation in Zero Emission Zones and bus depots, with geofencing capability up to 10 miles of electric range.

The IAP2 provides the highest electrical efficiencies by utilizing the latest Silicon Carbide (SiC) solid-state devices, which yield the lowest energy consumption, longest range, lowest maintenance costs, and much lower CO2 emissions.

Major components of IAP2 are:

High Voltage Distribution Module (HVDM), a smart high voltage power distribution module in constant communication with the Allison eGen Flex Electric Hybrid System;

Vanner Export Power Inverter (VEPI) converting 600VDC to 230VAC 3-Phase;

Hybrid Beltless Alternator (HBA) converting 600VDC to 28VDC. Vanner offer liquid-cooled and air-cooled HBA options

These buses will have Dual Air-Cooled HBAs producing five hundred (500) amperes.

The Allison eGen Flex Electric Hybrid System with Vanner’s IAP2 received certification from the California Air Resources Board (CARB) with a Cummins Inc. engine.

IAP2 is also directly applicable to heavy-duty zero-emission battery and fuel cell vehicles.

For nearly 50 years, Vanner has been a leading engineering, designer, and manufacturer of customized, proprietary power conversion, energy management, and communication systems, such as electric hybrid electrification systems, inverters, equalizers, alternators, isolators, and converters for commercial vehicles. Vanner began serial production in 2023 of its new 600 ampere Liquid-Cooled DC to DC Converter, incorporating silicon-carbide solid-state devices (SiC).

Posted on 16 August 2023 in Bus, Hybrids, Market Background, Vehicle Systems | Permalink | Comments (0)