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High frequency transformers for SMPS
Assembly on PCB
Application :
Switch Mode Power Supply
Gamme :
Frequency range from 50kHz up to 300kHz
Power range from 10W up to 2kW
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High frequency power transformer
Class F insulation system
Application :
Power electronic converters
Gamme :
Frequency range : 1kHz up to 50kHz
Power range : 1kW up to 150kW
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CURRENT SENSORS - FLY LEAD TYPE
Electrohms's products comply with system standards likes IEC 62053-21 [supercedes IEC 1036], IS 13779.
Applications
Metering & energy Management
Protection and Control
Custom current sensing solutions Electrohms specialises in developing special CT's for individual custom requirements
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ELECTROHMS’ transformers and inductive components serve a spectrum of industrial
applications. They include
Current transformers for circuit breaker applications
Voltage transformers for protection & electronic control applications
Low & hi-frequency power transformers for switchgear, electronic equipment & panel
indicators
Hi-frequency for DC/DC converters
Pulse transformers for
- voltage and current transformation
- isolation
- polarity reversal
- impedance matching
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High ferquency transformers for SMPS and inverters
Power transformers with ferrite core, iron powder core or other magnetic materials, for SMPS and inverters
- toroidal and linear design
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Pulse, signal and ignition transformers
Pulse transformers
- for IGBT/MOSFET gate driver, triacs etc.
- high insulation and very low leakage inductance
- toroidal and linear design
- for capacitive discharge with high-voltage output
Transformers for signal treatment and galvanic insulation on various equipments
- in compliance to "Ex" intrinsic safety requirements too (Atex)
- toroidal and linear design
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Electrohms offer a range of standard and customised solutions for your current sensing requirement. We are familiar with providing solutions for a range of Embedded micro-control energy and power control designs
Hall effect current sensing
Rogowski sensors
Current transformers using High Technology Materials for highest sensitivity and reliability
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HPT categoría de planar
The HPT series (Hybrid Planar Transformer) is able to manage power up to 3150W, with efficiency up to 99%, due to its design and its low losses. It is available with full-bridge and ZVT full bridge topology and it’s a specific solution for DC/DC transformers applications for 28V buses.
Key characteristics:
- High range of operating temperature from -40º C to 90º C, with heat sink dissipation, with effective temperature up to 125º C
- Storage temperature from -50º C to 170º C
- Operating frequencies up to 150KHz
Due to the advantages of this inductors, they are recommended especially for these applications: DC/DC converters of 28 V, inverter, DC/AC converter high voltage buses, electronic control unit (ECU), control unit.
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Safety transformers 50/60Hz standard and customized
Safety isolating PCB transformers according to
CEI EN61558-1(CEI 96-3) e CEI EN 61558-2-6 (CEI 96-7), 0,5 to 60VA.
- more common sizes are ENEC-IMQ certified.
- encapsulation in epoxy resin
- custom versions on request also with ENEC IMQ
- custom versions without encapsulation
High frequency power transformers : see related category "high frequency ferrite-core transformer"
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HIGH ACCURACY CURRENT TRANSFORMERS
Product Code IP(Arms) Turns Ratio Rb(Ohms) DCR(Ohms) AE(%) PE(Deg) Application Secondary Termination
CT1042 0.250 - 20.000 1 : 2500 90 120 - 145 0.5 0.5 HIGH ACCURACY PC mountable
CT1052 0.250 - 20.000 1 : 2500 90 120 - 145 0.5 0.5 HIGH ACCURACY PC mountable
CT1171 0.250 - 20.000 1 : 2500 90 98 - 120 0.5 0.5 HIGH ACCURACY PC mountable
CT1176 0.250 - 20.000 1 : 2500 90 98 - 120 0.5 0.5 HIGH ACCURACY PC mountable
CT1179 0.250 - 20.000 1 : 2500 90 115 - 148 0.2 0.3 HIGH ACCURACY PC mountable
CT1164 0.250 - 60.000 1 : 2500 37.5 65 - 75 0.1 0.2 HIGH ACCURACY PC mountable
CT1216 1.000 - 300.000 1 : 2000 6.8 <21 0.1 0.1 HIGH ACCURACY Flyleads
CT1209 0.250 - 20.000 1 : 2500 90 115 - 148 0.2 0.3 HIGH ACCURACY PC mountable
CT1267 0.250 - 40.000 1:2500 30.0 98 Typ 0.1 0.25 HIGH ACCURACY PC Mountable
CT1248 0.050 - 10.000 1:1500 75.0 45-60 0.2 0.5 HIGH ACCURACY PC mountable
Nomenclature
Ip (Arms) : Operating primary current range in A rms
Turns ratio : Recommended ratio of primary turns to secondary turns
Rb : Burden resistor connected across the secondary winding
DCR : Secondary winding resistance
AE (%) : % Max amplitude error in the operating primary current range
PE (Deg) : Max phase error in the operating primary current range in Degrees
Secondarytermination : PC mountable corresponds to secondary winding terminated on pins which are directly mounted on a printed circuit board. In the case of Fly leads, the secondary winding are terminated on to hook up wire.
Last Updated on 10/11/2005
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Measurement transformers
Current sensors and voltage transformers
Current transformers, for 50/60 Hz and High Frequency.
- with nanocrystalline and amorphous cores with low linearity and phase errors, “DC tolerant” versions too
- types for high frequency with ferrite core
- built-in primary winding on some product types.
- usually supplied encapsulated in epoxy resin, wired or for PCB assembly
- toroidal and linear design
Transformers designed for voltage measurement with good linearity and galvanic insulation, up to 10KV dielectric strenght.
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Toroid Corporation offers two low cost standard design current transformers. Both are used in applications where you want to detect or measure AC-currents with no need for tight tolerances. Typical applications include power limiting controllers for air conditioning equipment, electrical heating systems, electrical furnaces, and motor drives.
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Our high performance, space saving designs are custom matched to leading chip sets. Coilcraft will also design application-specific transformers to meet your requirements.
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Lower cost than toroidal equivalents
Frequency range of 10 - 250 kHz and up;VDE, IEC, UL, CSA compliant ;3750 Vrms isolation between windings ;Constructed with UL approved Class 130°C insulation system (UL File) ;E83628)
RoHS-compliant. Tin-silver over tin over copper terminations.
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* Specified by ON Semiconductor for use with their NCP1605 PFC Controller.
Referenced as X25, pulse transformer on evaluation board NCP1605FORWGEVB and Application Note AND8292.
* Recommended by Texas Instruments for use with their UC3875 Phase Shift Resonant Controller.
* Three 1 : 1 windings
* 500 Vrms winding-to-winding isolation.
* RoHS-compliant Tin-silver over tin over nickel over brass.
* COTS Plus tin-silver-copper and tin-lead terminations available
* Custom versions available
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Using an auto-transformer is always an economical solution when you need to step down the voltage from 230V to 120 V or vice versa, and the equipment already has a fully isolated transformer or when the components do not require an isolated transformer.
The toroidal construction of an auto-transformer offers important advantages in comparison with an E/I lamination core transformer, like smaller physical size and weight, 30-70% reduction (depending on secondary voltage) and very low magnetic strayfields. The auto-transformer can be mounted horizontally using a steel washer or our Poly-Mount, a plastic insert, or an epoxy potted center with a 1/4" mounting hole.
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Autotransformer VT-EN Range
Common input and output windings without electrical isolation
Designed for continuous duty
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System comprises an isolation transformer and a common mode choke DETAILS
Meets all current requirements of Gigabit Ethernet PoE Plus
Isolation Transformer OCL ³ 350 µH with a 35 mA dc offset up to 70°C.
Can handle current up to 800 mA
Can be used with virtually all chipsets
RoHS-compliant. 260°C compatible. Tin-silver-copper over tin over nickel over phos bronze terminations
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Standard Isolation Transformers are UL recognized to UL1411. Comply with CSA/TUV/IEC 742/IEC 950, 4000V hi-pot tested, 8mm creep distance. Supplied with metal washer and rubber pads.*
Dual Primaries (2 x 117V), 50-60Hz Operation
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Electrical specifications
- Power: 10 VA
- Not Protected(secondary protection installable by the user)
- Ambient temperature: 70 C
- Certified ENEC
- Built according to EN 61558-1 61558-2-6
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- Single-phase reactor for use in consumer or electronics market
as a line, commutation of PFC reactor.
- Guarantee of frequently desired short circuit voltage of 4 % to
mains.
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Model: TT201265/T
- Primary Voltage: 230 V
- Secondary Voltage: 12 V
- Power: 20 VA
- Protection: Thermal Switch
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Electronic Transformers flat version
Skb60: 2 pole terminal block
- Power: 60-105 VA
- Primary: 230 V
- Secondary: 12 V
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PICO surface mount units utilize materials and methods to withstand extreme temperatures of vapor phase, I.R., and other reflow procedures without degradation of electrical or mechanical characteristics.
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