Use of Cookies

Cookies helping us to provide our service. If you continue browsing on this site, you agree that we may use cookies.

I agree

Dynamic Energy Supply saves trouble

Active supply module DEV 2.0 for DC links

> for single axis and multi axes systems
> no buttons, display indicators, other controls
> provides support during power failures or interruptions
> with a digital interface
> conformity with UL

Bypass brief power failuresDEV - Dynamische Energy Supply

Two factors are of particular importance to companies with regard to electric energy: a secure supply and low prices. The phasing out of atomic energy calls both these factors into question. When the big picture is broken
down to a single electric drive or combined drives, power interruptions currently present a special challenge even for developed countries. The Dynamic Energy Supply for inverters and servo controllers can at least be used to bypass and minimize the effects of short-term power interruptions.

Power failures are common in industrial operations and result in an increase in expenses. In Germany there were over 200,000 low and medium voltage power interruptions in 2011 (source: Federal Network Agency). The consequences: Machines are literally disrupted, tools and workpieces can be damaged, and complete machines are put into an uncontrolled state, or at least require extensive efforts to be restarted. The operating data may become confused and bring about some massive correction efforts. A central emergency power supply that is instantaneously available to the entire production chain requires heavy investments. For this reason, a targeted approach is necessary to optimize costs in comparison to revenues.

Short-term UPS for inverters

The Dynamic Energy Supply DEV acts as a short-term uninterruptible power supply to inverters and servo controllers. The active capacity expansion for the DC link of the inverter´s stores an amount of energy that is defined according to the technical design. In case of a power failure, this is used to maintain the voltage level of the DC link at a level to bypass the interruption without disturbance and/or to bring the machine to a defined stop. The objective in each case is that the drive and all of the systems powered by it are either not affected by the power failure or that they are placed into a defined state, from where it may be restarted without effort. Both these are part of the application engineering that may be solved with the help of the DEV. The standard version of the active capacity expansion for the type 2.0 of the DEV has a capacity of about two kilojoules. Because it is designed for inverters with maximum DC link voltage of 800 VDC that have a direct link connection, the Dynamic Energy Supply is compatible with any standard inverter, whether these are installed in single axis or multiple axes systems.

Save the power grid and the inverter

The energy storage will be charged when the inverter is turned on by the charging routine that is designed for delicate operations to avoid excessive loads on the charging circuit of the inverter and to reduce power quality disturbances as much as possible. The DEV is fully operational after approx. eight seconds. Then it is ready to supply power to the DC link any time when its voltage drops below 470 VDC.

If the storage capacity of a DEV is not sufficient for the specific application, it can easily be increased by means of so-called extension modules. They are simply connected with the Dynamic Energy Supply by means of a cable with polarity protected plugs. These expansion modules provide additional energy in approx. two kilo joule increments. Short-term power outages are common today. It is expected that they will occur more frequently rather than decreasing. At the drive level, the Dynamic Energy Supply DEV presents a remedy that can wipe out the consequences of such power interruptions. This protects tools and workpiece, minimizes restart costs, saves ongoing operating data and especially the user's nerves.

DES - Dynamische Energieversorung

Connect the DEV and it works

The device is connected to positive and negative terminals of the DC link and turns on by itself once the DC link has been charged with energy. For this reason, the device does not have any buttons, displays or other controls. With two exceptions: On the one hand, a small LED on top of the unit indicates whether the storage unit has been charged with energy. This is relevant to safety. It can easily be discharged by means of the built in PTC braking resistor. On the other hand, a digital 24-volt interface can be used to issue a message when the DEV delivers energy to the DC link. The controller can make use of this signal as required by the operator of the machine: To instantaneously trigger a controlled standstill and to terminate this or to trigger it only after a certain delay in order to overcome short power interruptions.

Technical specifiations DEV 2.0

Usable energy approx. 2,000 Ws
Constant voltage DC link circuit
max. 800 VDC
Working voltage ex-factory 470 VDC (other available)
Output power
max. 18 kW
Digital interface 24 VDC (to monitor operations)
Built-in PTC discharge resistor +
Dimensions: H x W x D
300 x 100 x 201 mm (11.81 x 3.94 x 7.91 in)
Weight approx.       
6.9 kg (15.21 lbs)
Protection class  
IP 20










Download: Data Sheet

Please leave a messageWe received your Message. Thanks!Close

Please fill out the form below.

Add a message