At its core, DC2AC is a set of motor controls which allows you to utilize modern AC drives and motors in place of aging and often obsolete shunt and series wired DC systems, at a fraction of the cost of traditional DC options.

Upgrading an old DC crane to AC performance used to rely on costly infrastructure upgrades, or even worse, expensive DC based digital drives from a limited number of suppliers. DC motors are becoming increasingly difficult to source. The market has become limited with most frame sizes only available from overseas sources.

Hoist & Crane Service Group now offers a viable, and cost effective, option to achieve AC performance without having to perform a total electrical service replacement. The DC2AC drive provides a path to cost effective, technologically modern solutions to aging motors and control systems. In addition, the entire system is based on a common platform, familiar to any crane service or industrial technician.

  • Fine speed control and positioning
  • Full torque at each speed
  • Lower acquisition costs
  • Lower training and maintenance costs
  • Readily available spare parts
  • Commercial sourcing of materials and spares
  • All-in-one package based on current, multi-sourced components




Hoist & Crane’s AC Inverter can cost up to 66% less than the cost of Digital DC Drive. Now, most AC Inverters can operate in a 50°C environment without cooling, with simple provisions allowing up to 65°C operation. An AC squirrel cage inverter rated motor can cost up to 75% less than a new shunt wound DC motor, would be readily available, and would require no brush or commutator maintenance.

Infrastructure Savings

With an inverter system, you do not have to bring in new 460v AC service. Rather, you can save significant money and continue to use the building’s existing wiring, bus, and runway conductor systems.

Training Savings

Inverters are a staple in rotating machinery and do not require extensive training for operation and maintenance.


Inverters are reaching a “commodity” level in availability, resulting in improved quality and lower pricing. Inventory costs fall in larger proportion to the acquisition costs due to a reduced number of components required, overnight availability, and a broad source of equivalent products.