Electromagnetic compatibility (EMC) components for LCL filters in regenerative inverter systems

Filter 18.432M

TDK Corporation has introduced the EPCOS high-performance LCL filter (B84143*405) series for regenerative inverter systems. The series consists of a power choke, a capacitor bank with a damper resistor, and a rugged choke. The filter circuit greatly reduces the clock frequency and is fully compliant with IEC / TS 62578. The EMI emission range is 9 Specification for devices from kHz to 150 kHz. In addition, in regenerative inverter systems, the EPCOS LCL filter can significantly reduce line-side current harmonics (less than 5%). Finally, in high DC link voltage applications, the LCL filter can also turn a regenerative drive into a boost converter via an integrated choke.

The latest series of LCL filters from EPCOS are rated at 520 V and rated at 16 A, 66 A, 200 A and 400 A. Two smaller models with rated currents of 16 A and 66 A are mounted on the mounting plate for ease of use; larger models with rated currents of 200 A and 400 A are composed of two parts, including a single energy storage. Choke and a mounting plate that combines a power choke and capacitor bank. The LCL filter is mainly suitable for feedback modules with a clock frequency of 7 kHz to 16 kHz and motor-side inverter modules with a clock frequency of 4 kHz to 16 kHz. It supports motor leads or 6-axis leads with a maximum length of 150 m. The motor frequency is 100 Hz. In addition, the built-in damping resistor prevents natural oscillations. The latest series of LCL filters from EPCOS are designed with an open design and IP00 protection with convection cooling (according to IEC 60529 2001); we can also provide you with an additional protective cover for IP20 protection, please use the order code B84143Q*R405 Make an order.

Compared to a separate power supply choke, the EPCOS LCL filter significantly reduces harmonics and voltage and current distortion of the power line. In addition, the LCL filter has a lower voltage drop and is more compact and lighter than a power choke of the same specification. The LCL filter can be modified as needed, depending on the customer's needs.

main application

· Regenerative inverter system

Main features and advantages

· Rated current up to 400 A, rated voltage 520 V

· Significantly reduce harmonics, less than 5%

· Lower voltage drop and voltage and current distortion

· Compact design and lighter weight