n e w a c t i v e current sensors with primary conductor opening Advanced Materials The Key to Progress

Transcription

1 n e w a c t i v e current sensors with primary conductor opening Advanced Materials The Key to Progress

2 THE COMPANY VACUUMSCHMELZE VACUUMSCHMELZE GmbH & Co. KG (VAC) is one of the world s leading producers of special metallic materials with particular physical properties and products produced from them. With approximately 4,300 employees worldwide, the company is represented in 50 countries and currently achieves a turnover of approximately EUR 380 million. The headquarters and registered office of the company is Hanau, Germany, with additional production plants in Slovakia, Finland, Malaysia and China. Contents 1. Application Benefits Page 3 2. Type Series Page 4 3. Dimensional Diagrams Page 5 4. Application Note Page 7 2 New active current sensors with primary conductor opening

3 closed loop sensor with magnetic probe developed by VAC as a zero field detector two new type series for rated currents of 50 A to 200 A and peak currents up to ± 390 A in compact designs types for + 5 Volt power supply with voltage output types for ± Volt power supply with current output very good measuring accuracy, minimum DC offset with very low hysteresis negligible output noise or periodic signal at zero input very low temperature dependence and long-term drift of the output variable low rise time, wide frequency range low-cost constructions compatible dimensions and pinning TWO NEW VAC CURRENT SENSOR SERIES VAC offers two new current sensor series for PCB mounting with integrated electronics and with an opening for the primary conductor. Thus they supplement the already introduced new active current sensor series for maximum accuracy with integrated primary conductor. The new types apply the principle, developed by VAC, of the closed-loop sensor with magnetic probe as a zero field detector, and use the IC developed together with a leading semiconductor manufacturer. All new types offer the detection of high maximum and continuous currents. The new VAC sensors can be used in many customer applications without adaptations. Detecting highest currents with a unipolar + 5 V-supply The types T60404-NX160 and -X161 detect maximum rms continuous currents up to 100 A and peak currents up to ± 230 A and require nevertheless only a unipolar 5 V- supply. New active current sensors with primary conductor opening 3

4 TYPE SERIES OF NEW CURRENT SENSORS WITH PRIMARY CONDUCTOR OPENING Item no. Type T60404-N Rated current IPN, N = 1 : N Max. measuring range V C = + 5 V or V C = ± V Ambient temperature range T amb Supply voltage V C Turns ratio K N = 1: Output variable Frequency range f Max. error IPN; T amb = 25 C Primary Connection Secondary Connection Integrated Electronics Encapsulated Dimensional diagrams [A] [A] [ C] -40 to [V] [khz] DC to [%] Conductor Opening Pins X ± 2351 ± ± I X ± 1881 ± ± I X ± 1881 ± ± I X ± 2351 ± ± I X ± U X ± U X ±201 1 ± ± I X ±3051 ± ± I Abbreviations and terms 1) for supply voltage ±12 V* 2) for supply voltage ±15 V* 3) reference voltage input V, which also can be used as reference voltage output 2.5 ±0.005 V. Source resistance R S = 670 Ohm 4) V out = V ref ±(0.625 x IP/IPN) * value depends on chosen measuring resistance I PN,rms [A] primary rated current I P,max. [A] maximum measuring range T A [ C] ambient temperature V c [V] supply voltage K N turns ratio f [khz] frequency range X [%] accuracy 4 New active current sensors with primary conductor opening

5 Dimensional Diagrams Drawing no. 1 14,3 6, Type T60404-NX100 and...x101 Tolerances grid Marking: Connections: distance ± 0.2 mm Excerpt from 1 3: 0.7 x 0.7 mm item no. F DC 22,86 36,5 5,08 Marking F = Factory Pin Assignments: DC = Date Code 1: + V C 2: -V C 3: I S 27,6 8,5 12,35 4,5±0,5* 0,4 12,7 0,7x0,7 Drawing no. 2 13,97 21 Type T60404-NX111 and...x112 14,3 6, Tolerances grid Marking: Connections: distance ± 0.2 mm Excerpt from 1 3: 0.7 x 0.7 mm item no. F DC 21, 22: 3.2 x 1.6 mm 22 22,9 36,5 5,08 Marking F = Factory Pin Assignments: DC = Date Code 1: + V C 2: -V C 3: I S 21, 22: I P 3,2 27,6 12,35 4,7±0,5* 0,4 5,2 3,2 0,7x0,7 12,1 22,9 1,6 New active current sensors with primary conductor opening 5

6 Drawing no. 3 14,3 6, ,54 Type T60404-NX160 and...x161 Tolerances grid Marking: Connections: distance ± 0.2 mm Excerpt from 1 4: 0.7 x 0.7 mm item no. F DC 27,6 22,86 36,5 5,08 Beschriftung F = Factory Pin Assignments: DC = Date Code 1: +V C 2: earth 3: V OUT 4: V REF in/out 8,5 12,35 4,5±0,5* 0,4 12,7 0,7x0,7 Drawing no. 4 40,64 2xØ1,75 Type T60404-NX200 and...x201 21,4 8,89 19,4 6,95 Tolerances grid Marking: Connections: distance ± 0.2 mm Excerpt from 1 3: 0.6 x 0.88 mm item no. F DC ,5 2x12,7 5,08 48,4 27,55 F = Factory Pin Assignments: DC = Date Code 1: -V C 2: I S 3: +V C 4: n/c 18,5 Marking 32,0 5,0±0,5* 14 0,4 20,5 4,5 11 0,88x0,60 6 New active current sensors with primary conductor opening

7 Technical part Application Notes Current waveforms As well as the amplitude, the waveform of the current to be measured has an influence on the losses and thus the heating of the sensor. The operating currents to be measured in power electronics are usually direct currents, or alternating currents up to a maximum frequency of several 100 Hz, with a high amplitude. They are superimposed by the switching currents of the power semiconductors, which are in the single digit to mid double digit khz range and have harmonics up into the triple digits. Their amplitude is lower by an order of magnitude. Our current sensors are designed to operate with such primary currents. However, when the amplitude of the high frequency components is continuously much higher, it can lead to excessive heating of the sensor core. The heating also depends on the location of the primary conductor in the sensor opening and the position of the return conductor relative to the sensor. Conducted and radiated emissions Under very unfavourable conditions, there may be an influence on the sensor by irradiation from interference signals. Low or medium-frequency interference is due to magnetic fields, for example from power chokes or transformers. High-frequency interference, usually in the range of several hundred MHz, can be injected directly into the sensor or via the connecting leads. Whether a possible high-frequency effect on the current sensor has practical consequences for the application depends on the design of, for example, the shielding of the housing. The VAC current sensors from the various series are successively tested for electromagnetic compatibility according to EN : 2010 with a field strength of 20 V/m and 80 % AM 1 khz over the frequency range 80 MHz to 1000 MHz. Please contact us to inquire on the current status of the tests. Positioning of the primary conductor in current sensors with a primary opening In compensation sensors, a magnetic flux generated by the primary current is detected in the sensor core and compensated for by an equally large flux of reversed polarity. Although our sensors are magnetically very robust in design, the optimal function of this measuring principle is not completely independent of the position of the conductor in the magnetic circuit, or of the position of external currentcarrying conductors relative to the magnetic circuit and the zero-field probe sensor. Also of importance are the amplitude and frequency of the current. The resultant influence can affect the dynamic characteristics of the sensor, the measuring accuracy at high levels and possibly heating. The Offset ripple The so-called offset ripple stated in our data sheets is actually no offset. Instead, it is the not completely suppressed remnant of the internal probe signal. The frequency of this signal is 400 khz or more. It is zero symmetrical and does not affect the measurement accuracy when integrated over at least one period. In addition, it can be further reduced with a simple low pass filter (capacitor parallel to the measuring resistor). Details are given in the data sheets. Generally, the best results are achieved if the conductor is put centrally through the sensor opening and the immediate area around the current sensor is kept free of conductors carrying high currents. More information is available on request. Location of the magnetic probes in the sensor families N464 and -X1xx and Nx2xx New active current sensors with primary conductor opening 7

8 vacuumschmelze gmbh & co. kg grüner weg 37 d hanau / germany Phone fax info@vacuumschmelze.com VAC Magnetics LLC 2935 dolphin drive suite 102 elizabethtown, ky Phone fax info-usa@vacmagnetics.com VACUUMSCHMELZE Singapore Pte Ltd 1 Tampines Central 5, #06-09 CPF Tampines Building singapore Phone fax vacsingapore@vacuumschmelze.com VACUUMSCHMELZE China Magnetics Shanghai Sales Office Room 06, 19F Zhongrong Hengrui International Plaza 620 Zhangyang Road, Pudong District Shanghai, PRC Phone Fax vac_china@vacuumschmelze.com KB Active Current Sensors EDITION 2016 Published by VACUUMSCHMELZE GmbH & Co. KG, Hanau VACUUMSCHMELZE GmbH & Co. KG All rights reserved. is a registered trademark of VACUUMSCHMELZE GmbH & Co. KG Advanced Materials The Key to Progress