• Charging current and charging voltage can be freely set
• 300 W model features fanless design

September 10, 2015

TDK Corporation announces the successful development of the EVS series of constant current power supplies with a simple function set, designed for electrical energy storage and water processing applications. The new products will be marketed under the TDK-Lambda brand. In addition to a 300 W board type fanless model and a 600 W unit type model, a dedicated module for backflow prevention module will also be offered, resulting in a lineup that covers a wide range of customer needs. TDK-Lambda Corporation will start accepting orders for the new products from September, and shipping will begin in October 2015.

In recent years, the demand for electrical energy storage systems for peak shift and peak cut applications as well as for emergency use is rapidly increasing. The EVS series has been designed as a constant current power supply optimal for integration in such systems, providing the required constant current constant voltage charging capability. The upper output voltage limit as well as the constant current value can be set by the customer using equipped trimmers.

The series comprises a 300 W and 600 W model with simple functionality. The 300 W model realizes silent operation through a fanless design. Available output voltage ratings are 18 V*, 36 V, and 57 V, to suit the requirements of 12 V*, 24 V, and 48 V storage systems. Parallel operation is also supported, to enable charging of high-capacity storage systems

With the development of the new series, in addition to the existing full-function models of the HWS-L/BAT series, TDK-Lambda will now be offering a broad and versatile lineup of power supplies for charging electrical energy storage systems. A dedicated backflow prevention module designed for insertion between the power supply and the storage system and featuring much lower heat generation than a conventional backflow blocking diode will be also be made available, with orders being accepted from October. This backflow prevention module can be used with products from the EVS series as well as the HWS-L/BAT series.

* The 18 V output type for 12 V storage systems is available only as the 300 W model.

■ Glossary

• Constant current constant voltage charging:

  A charging method where both the charging current and charging voltage are controlled in order to protect the battery from overcharging.

■ Main applications

• Charging of various types of storage media, including lithium ion batteries, nickel hydride batteries, and lead acid batteries
• Applications where constant current control is required, such as electrolysis of water, LED drive etc.

■ Main features

• Trimmers on power supply allow presetting of charge current and charge voltage to implement constant current constant voltage charging
• 300 W model features fanless design
• Various output voltage ratings to match storage system voltages are available
  For 12 V storage systems: 18 V output type * Only available as 300 W model
  For 24 V storage systems: 36 V output type
  For 48 V storage systems: 57 V output type
• Compliant with UL 60950-1 and EN60950-1 safety standards
• Dedicated backflow prevention module for insertion between power supply and storage system available

■ Key data: EVS Series

Source：http://www.global.tdk.com/