MOOG DE2020 Energy Management System

DE2020 SYSTEM OVERVIEW

Modes of Operation:

• Power Leveling

In a typical machine cycle, accelerations require peaks of power; the

DE2020 can handle energy using energy storage accumulators in

order to guarantee a performance beyond the nominal power of the

electrical equipment.

• Energy Recovery

Usually while braking, the energy that motors give back to the

system is partially wasted as it is dissipated on the power supply

dynamic braking resistor. With the DE2020 module, this energy

is stored in  the accumulator energy banks, such as the Moog

Additional Bus Capacitor (ABC module) or larger in sizes, in order to

be saved and reused.

• Energy Backup

The DE2020 can use the energy stored in the accumulator energy

banks when the grid is down to ensure safe home movements of the

machine and/or to keep safely controlling critical axes during grid

failures. This feature makes the system more reliable and protected

against issues related to sudden losses of power from the grid.

TYPICAL WORK CYCLE

During normal machine activity, the DE2020 module will:

• Manage the input power profile, shaping the electrical power

coming from the input, leveling the peaks, and flatten the load

peak on the DC grid.

• Charge the accumulator energy banks and accurately control

the voltage across them.

• Provide additional energy during acceleration phases.

• Handle the kinetic energy obtained from running masses

during their braking phases.

• Provide the system with previously stored energy during

acceleration phases.

• Temporarily withstand DC grid failures or unexpected

disconnections of the DC power supply providing the system

with the necessary energy to bring the machine to a safe state.

HIGH PERFORMANCE DESIGN FOR SMART POWER MANAGEMENT

The Moog DE2020 energy management module improves the efficiency

of any machine and allows for a leaner and more cost-effective electrical

layout. During the regular load phase, a capacitor bank is pre-charged

carefully and a certain remaining capacity is retained.

The DE2020 meets peak loads by drawing energy from the capacitor

bank, while using the energy gains from braking processes and mechanical

inertia to recharge the capacitors by means of recuperation. 

Thus, the capacitors are ready for the next peak load. This helps increase

overall energy savings and, more importantly, allows for an overall smarter

electrical design of the machine.

Advantages

Among other advantages, there is a significant reduction in the dimensions

of the electrical panel (reduced by 50% compared to non-optimized systems)

and of the cable sections necessary to allow the currents to flow

(with consequent savings in wiring costs).

Furthermore, this system can also be used to compensate for fluctuations 

of the mains, using a pre-filter in combination with the capacitor bank, reducing

the risk of electrical malfunctions, while simultaneously increasing safety in the

event of a power failure, as it can supply the system with enough energy to

reach a safe-stop position.