DC-Link
In a variable frequency drive, power conversion schemes are used which incorporate an intermediate stage where energy is processed at DC. 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.

DC link capacitors
Product Type | Series | Technical Data | Datasheet | Features Overview |
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Capacitor | B43512 |
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Capacitor | B43642 |
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Capacitor | B43544 |
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Capacitor | B43545 |
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Capacitor | B43547 |
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Capacitor | B43703/23 |
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Capacitor | B43704/24 |
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Capacitor | B43705/25 |
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Capacitor | B3277x |
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Capacitor | B3267x |
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Capacitor | B2562x |
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Capacitor | CKG - MLCC Megacap |
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Capacitor | CeraLink - SP (B58033) |
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PTC ICL thermistors
Product Type | Series | Technical Data | Datasheet | Features Overview |
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PTC ICL | Housed - ICL PTC |
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PTC ICL | Leaded ICL PTC |
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Y caps
Product Type | Series | Technical Data | Datasheet | Features Overview |
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Y Caps | B3202x |
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Power chokes
Product Type | Series | Technical Data | Datasheet | Features Overview |
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Power Choke for DC BUS | B82726E6* |
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Download |
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Power Choke for DC BUS | B82727E6* |
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Download |
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Power Choke for DC BUS | B82734R8*U* |
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Power Choke for DC BUS | B82725A/J/S |
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Download |
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Power Choke for DC BUS | B82726S |
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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 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 MoreOutput 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.
Learn More