Insights

In 1870, Direct Current (DC) motors became the ubiquitous power source and moved the country into the second industrial revolution. Thomas Edison championed the DC power grid, which initially fed electrical energy into the factories to power these mammoth motors. The DC motor was coveted for use because its speed and direction could be easily […]

There are many ways to send electrical energy to a DC motor.  One is A/C power rectified to DC with diodes, A/C to DC from thyristors, or DC straight from a battery connection.  Our cars use a DC starting motor to bring the engine to life.  A battery connection powers this starter.  The battery connection […]

Li-ion batteries are used extensively throughout our world today. They are lighter than conventional batteries, providing a power-to-weight ratio that is much higher.  Their development has led to power electric cars. We will use them to power the Evergreen State. The Evergreen State will be using a battery system that has been developed to mitigate […]

Class and type: Evergreen State-class auto/passenger ferryLength: 310 ft (94.5 m)Beam: 73 ft (22.3 m)Draft: 15 ft 10 in (4.8 m)Decks: 4 separate levelsDeck clearance: 13 ft 7 in (4.1 m)Original Power: Total 2,500 hp from 2 Diesel-Electric engines with 4 DC motorsNew Power: 2.2 mega watt lithium ion battery bankSpeed: 13 kn (24 km/h)Capacity: […]