Technology (Patent Pending)

EVPS designed, developed, and tested an electric-drive system powerful enough to move very large vehicles.  System  can be utilized in both hybrid and all-electric vehicles.  Our initial product utilizes technology in a commercial retrofit plug-in hybrid-electric drive system. 

Highlights

• Electric Power System has Multiple Applications
  The electric-power system can be used in both hybrid and all-electric applications.  As a hybrid, system can be retrofit to pick-up trucks, smaller delivery vans, shuttle buses, school buses, refuse trucks and other applications where the driveshaft is accessible.  The system can also be used to power all-electric configurations.  The system can be custom-fit (within limits) to meet special torque or range requirements.
    
• Modular, Technology Neutral Design
  System design allows different motors, controllers and batteries to be installed in the retrofit PHEV.  For example, depending upon the duty cycle, the most cost-effective components for one user might be “separately excited motors with lead-acid batteries.”  Another user with a different brand vehicle and duty cycle might need AC motors and lithium batteries rather than lead-acid.  System is scalable to allow designs and installation on larger vehicles.

• Proven, Off-the-Shelf Components
  A major risk for companies in emerging markets is properly selecting which technology will "win."  Rather than risk the company on a specific technology, our approach is design a modular system using proven, off-the-shelf components. 

  This decision was based, in part, on real-world experience of EVPS management in developing and introducing a series of new products, including electric vehicles.  Using off-the-shelf components (i) reduces capital required to develop components, (ii)allows EVPS to match components to customer needs, and (iii) allows upgrades as new technology introduced.
   

• Proprietary Design
  What is not "off-the-shelf" is how components are integrated and how controllers programmed.  The dual-motor hybrid retrofit system is a good example.  While seemingly simple, the integration is much more complicated.  A number of people told us dual motors cannot work together or if they do dual-motors are very inefficient.  After driving the truck, they ask, "How did you achieve the efficiency?”  Our response, "Like Coca-Cola, trade secret."   In addition, there is a proprietary interface between the controller and the internal-combustion engine.  EVPS system is designed to (i) monitor throttle opening, manifold pressure, rpm’s, engine temperature, instantaneous fuel consumption, etc., (ii) optimize use of batteries electrical energy – i.e., increases electrical output when the internal-combustion engine least efficient, and (iii) allow for software upgrades in the field.