Instead they are encouraging end-users to source equipment such as input mains chokes and filters, DC link braking resistors and output dv/dt filters, sinusoidal filters and motor chokes independently. This is to be welcomed by VSD users as they are now able to more easily compare like for like without the issue being clouded by basic inverter variations. Reo has launched its REOunity range of wound components to address this trend.
When the European Electromagnetic Compatibility (EMC) Directive and the G5/4 recommendation were introduced VSD manufacturers clamoured to offer radio frequency interference (RFI) filters and chokes as part of a product range complete with ancillary components. More recently, drives manufacturers have been distancing themselves from offering anything other than a standard range of core products with minimum essential EMC requirements. OEMs, systems integrators, machine builders and end users now have to determine the EMC requirements at the site where the VSD equipment is being commissioned. This simplifies the comparison process for users when choosing between different VSDs and makes the buying decisions for OEMs and machine builders a little more straightforward.
To address this trend, Reo has launched the REOunity range of resistive and inductive wound components, available from stock. REOunity includes variants for ingress protection (IP) and liquid cooling, which can reduce component size by more than half. Many renewable and marine applications are moving towards water cooling, because it offers superior environmental protection for drive systems. The heated water produced can also be easily recycled. REOunity offers a number of solutions for VSD users and OEMs, including line reactors and harmonic filters on the input side, DC reactors or braking resistors for the DC link, and chokes, dv/dt filters, sine filters or current transformers for the output side. These are used in order to counteract interfering phenomena such as EMC problems, harmonic ripple, voltage spikes, short-circuit currents and interference currents, and to meet the demands of the current EMC and power quality directives for clean energy networks, without restricting efficient plant operation. In addition when a motor is started or slowed down, starting currents have to be attenuated and excess energy dissipated and brake resistors remain the most cost effective option.
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.