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EPCOS Product Brief 2012 SineFormer Technology Sine-wave EMC Output Filters With its new SineFormer® EPCOS is introducing a fully new output filter technology for frequency converters. In contrast to conventional filter topologies the new SineFormer simultaneously converts the phaseto-phase voltages into a sinusoidal signal, damps the common mode currents and also forms the conductor-to-ground voltage to sine-shaped voltage. This offers users a number of key benefits. Voltage peaks that are harmful for the motor windings are suppressed and bearing currents are reduced to negligible levels, thus significantly increasing the operating life of the motors. SineFormer The most important benefit is the cost savings. Because SineFormer practically eliminates EMC problems. Motors protected by the new filter do not require expensive shielded motor cables or special cable ducts. Technical data Rated voltage Rated current Clock frequency Approvals Voltage drop Vibration Rated temperature Type 520 V AC (up to 180 A) 600 V AC (320 A) 760 V AC (95 up to 320A) 11 A to 320 A 4 to 8 kHz (up to 180 A) 2.5 to 3 kHz (320 A) UL, CSA (up to 180 A) 5% (11 A) to 10% (320 A) to IEC 60068-2-6 40 °C B84143V*R127/ B84143V*R290 Frequecy converter Power line Rectifier EMC filter DC link circuit + Converter Motor SineFormer M Motor cable More detailed information at www.sineformer.com www.epcos.com SineFormer Technology Sine-wave EMC Output Filters Advantages Benefits zz Unshielded zz Reduction of the dv/dt to <500 V/μs zz Reduction of the acoustic motor noise zz Significantly lower eddy current losses zz Significant reduction of bearing currents zz Avoidance of interference coupling from the motor cables can be used, thus reducing/ cutting assembly expenditures and cable costs, while increasing the operating life zz Motor size can be reduced zz Motor operating life can be significantly increased zz Longer motor cables possible zz No maintenance costs, as the SineFormer does not need forced ventilation zz Compact filter solution zz Improved performance of the line filter zz Increased equipment availability zz Also suitable as a retrofitting set motor cable to other power and signal lines zz Improved EMC performance compared with shielded cables zz Radiated interference within normative limits zz Optimum reduction of interference (conducted and radiated) compared to other output filter solutions zz No feedback loop to DC link of the frequency converter is necessary Measurements No need for shielded motor cables Minimization of bearing currents dBµV/m 80 Converter and unshielded cable (with and without SineFormer) 70 60 50 40 Unshielded cable Class A Group 1 High-frequency currents provoke bearing currents 30 Common-mode current at the motor 20 10 0 30 With SineFormer filter 100 P1: max(C1) P2: pkpk (C1) 81.3 mA 183 mA 1,000 MHz Without output filter Improved performance of the line filter Frequency converter with line filter and shielded cable 100 m acc. to EN 61800-3 cat. C1 dBµV 70 60 QP_C1 50 AV_C1 40 30 FFT High-frequency currents provoke bearing currents 20 Common-mode current at the motor 10 0 0.15 1 10 30 MHz P1: max(C1) P2: pkpk (C1) 72.5 mA 125 mA With sine-wave filter dBµV 70 Improved performance with SineFormer and unshielded motor cable 250 m acc. to EN 61800-3 cat. C1 60 QP_C1 50 AV_C1 40 30 FFT High-frequency parts are eliminated 20 Common-mode current at the motor 10 0 0.15 1 10 30 MHz P1: max(C1) P2: pkpk(C1) 12.4 mA 14 mA With SineFormer Important information: Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products. We expressly point out that these statements cannot be regarded as binding statements about the suitability of our products for a particular customer application. It is incumbent on the customer to check and decide whether a product is suitable for use in a particular application. This publication is only a brief product survey which may be changed from time to time. Our products are described in detail in our data sheets. The Important notes (www.epcos.com/ImportantNotes) and the product-specific Cautions and warnings must be observed. All relevant information is available through our sales offices. © EPCOS AG · A Member of TDK-EPC Corporation Edition 07/2012 · Ordering No. EPC:32013-7600 · Printed in Germany · PB 07121.