AP&T is introducing new energy-saving technology in its hydraulic presses. The system is called “Frequency Drive System”, and is similar to the start/stop function found in modern vehicles.
“Depending on their electricity contract, this can save our customers a lot of money. Less energy consumption also means environmental gains” says Magnus Svenningsson, Vice Division Manager – Sales, AP&T Press Systems.
Control of the electrical engines for the press hydraulics can help AP&T's customers save up to 40 percent on their electricity bills.

Control of the electrical engines for the press hydraulics can help AP&T’s customers save up to 40 percent on their electricity bills.

AP&T has been testing the new system both in the simulated testing environment and under actual operating conditions with customers. The system controls the speed of the electrical engines, which then control the load-sensing hydraulic system found in AP&T’s presses. This means the system can quickly reduce the speed of the electrical engines as well as quickly start them. The principle is similar to the start/stop system found in some modern passenger cars.
The test results are positive. Since utilization of the electrical engines is optimized to when they are really needed, it is possible to save up to 40 percent of the energy costs for the press. The amount that can be saved primarily depends on the customer’s electricity contract.
“The greatest savings can be made by customers who have contracts that include reactive power transmission costs,” says Magnus Svenningsson.
The new energy-saving technology in AP&T's presses is similar to the start/stop energy-saving function found in modern cars.

The new energy-saving technology in AP&T’s presses is similar to the start/stop energy-saving function found in modern cars.

 
More opportunities to save energy
AP&T also gives customers other opportunities to save energy. One example is the company’s unique system of hydraulic control of individual cylinders, which ensures that only the force required for the press operation is used. The system also offers the advantage of being able to operate the press slide more quickly since the cylinders’ entire area is not utilized.
Another energy-saving system is the accumulator system for hydraulic oil that can be installed with AP&T’s presses. This allows enough oil pressure to be maintained for an extended period without having to supply new energy.
“We see that the issue of energy is becoming increasingly important for our customers. We have several systems that can be used together or individually to help the customer achieve lower consumption,” says Magnus Svenningsson.