Output filtering
The output stage of a drive takes a three-phase AC output with variable frequency and amplitude for fine speed and torque control and filters it to minimise EMI and provide reliable operation of the power converter and load. Ferrite cores reduce EMI caused by the switching (e.g. a switching frequency of 10kHz leads to EMI of 1MHz).
Filters such as motor chokes, sine-wave filters and SineFormer® filters are complete solutions providing optimisation for demanding applications with long cable lengths from the output to the motor. Filtering on the output can also be performed by discrete AC capacitors.
Finally, Y capacitors are used to filter out common-mode noise and are selected to ensure they do not short-circuit and thus protect against shock to the user.

Power line filters (ferrite cores)
Product Type | Series | Technical Data | Datasheet | Features Overview |
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Power Line Filter (Ferrite Core) | B64290L |
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Download |
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Power Line Filter | B82725S2* |
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Download |
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Power Line Filter | B82746S* |
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Download |
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Power Line Filter | B82747E/S |
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Download |
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Output filters
Product Type | Series | Technical Data | Datasheet | Features Overview |
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Output Filter | B84143V*R127 |
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Download |
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Output Filter | B84143V*R227 |
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Download |
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Output Filter | B84143V*R/S229 & 230 |
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Download |
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Output Filter | B86301U*R000/S000 |
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Download |
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AC-capacitors
Product Type | Series | Technical Data | Datasheet | Features Overview |
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AC-Capacitor | B3236* |
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Download | Low end MKV replacement Different terminal configurations (M6-M10) Fluid resin (resinal( filled) with overpressure disconnector |
AC-Capacitor | B32332 |
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Download | Self-healing properties Low dissipation factor, High insulation resistance Overpressure disconnection safety device S2 safety class as per IEC-60252-1(ed-2) am1 EN 60335-1 compliance on request |
AC-Capacitor | B32354S |
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Download | Protected component by segmented film Low profile, compact design UL 810 compatible NEW: 85°C 85% 1000 h, UN compatible available |
Y caps
Product Type | Series | Technical Data | Datasheet | Features Overview |
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Y Caps | B3202x |
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Download |
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Motor protection
Product Type | Series | Technical Data | Datasheet | Features Overview |
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Motor Protection Single or Triple sensors |
B59100 / B59300 |
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Download |
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Inverters and drives brochure
Avnet Abacus offers a comprehensive portfolio of EPCOS and TDK branded products for state-of-the-art inverter and drive design

Protection
Thermistors acting as inrush current limiters are a low cost solution to this problem whilst input varistors are used to provide surge protection against voltage spikes on the input.
Learn MoreInput filtering
EMC input filter requirements include limitation of conducted and radiated emissions, immunity to transients and surges on the power lines, and immunity to levels of external electromagnetic radiation and electrostatic discharge.
Learn MoreRectification
Each AC input phase is rectified by 3 diodes (top diode in the positive direction and the low side diode of the other two phases) so that the peak of the negative half cycle appears positive.
Learn MoreDC-Link
A DC-link capacitor is fitted at this point to provide a low impedance path for high frequency switching currents and to provide energy storage.
Learn MoreConversion
At the conversion stage of a variable frequency drive, the DC voltage is converted into an AC voltage at a given but variable voltage and frequency to drive the motor.
Learn MoreThermal management
In a drive, the heatsink’s role is to cool the semiconductors and DC link capacitors and prevent overheating.
Learn MoreDriver and controller
The Control and Feedback stages analyse signals from the current sensors mounted at the motor output, measure the temperature of sensors and control the driver for the conversion semiconductors.
Learn More