DC-link and Snubber Capacitors
42Pages

- DC Link Capacitors - Snubber Capacitors - AC/DC General Purpose Capacitor

Capacitor Selection Guide Iskra manufactures and supplies a wide range of power electronic capacitors which can be used for various functions in electric circuits. They are most commonly used in frequency or voltage inverters, uninterruptible power supplies, motor drives, welding equipment, wind and solar power systems. A typical switching-mode power supply is shown in the figure below. DC link capacitors at position C1 are used for DC voltage smoothing. Capacitors at position C2 are snubber capacitors. When a switch opens, they eliminate voltage spikes caused by circuit inductance. AC...

Terms and Definitions CN - Rated capacitance Nominal value of capacitance measured at 20 °C. 9 UNDC - Rated DC voltage Maximum operating peak voltage of either polarity but of a non-reversing type waveform for which the capacitor has been designed. 9 UN - Rated AC voltage Root mean square value of a.c. voltage for which the capacitor has been designed. # Urms - r.m.s. voltage Root mean square of max. permissible value of sinusoidal a.c. voltage in continuous operation. 0 Uop - Operating voltage Highest voltage at given temperature at which the capacitor may be operated. 9 Imax - Maximum...

Iskra Applications ■ Hybrid vehicles ■ Wind plants ■ Electric energy generation from sea waves ■ Medical equipment ■ Industrial equipment ■ Car electronics ■ Railways and turbines (generator) ■ Frequency inverters ■ Elevators ■ Welders Reference standards Features ■ IEC 61071 ■ UL 810 (construction only) File No.: E196169 ■ Used in DC-link circuits, can replace electrolytic capacitor ■ Low ESR, high ripple current handling capabilities ■ LowESL Self-healing properties ■ Longlifetime Aluminium case, filled with epoxy resin Specifications Capacitance range Capacitance tolerance Voltage...

DC Link CapacitorsType KNG2047 - KNG3047, KNG2048 - KNG3048General characteristicsCapacitance range Undc (V DC)

DC Link Capacitors Type KNG2047 - KNG3047, KNG2048 - KNG3048 Dimensions

DC Link CapacitorsType KNG1910, KNG1914Applications ■ Hybrid vehicles ■ Wind plants ■ Solar power plants ■ Electric energy generation from sea waves ■ Medical equipment ■ Industrial equipment ■ Car electronics ■ Railways and turbines (generator) ■ Frequency inverters ■ DC filtering applications Reference standard ■ High capacitance ■ IEC 61071 ■ Self-healing properties ■ High reliability ■ Low losses Low dissipation factor of dielectric Specifications ■ Rated capacitance ■ Capacitance tolerance ■ Rated voltage ■ Test voltage ■ Self-inductance ■ Insulation resistance between terminals ■...

DC Link CapacitorsType KNG1910, KNG1914General characteristics Capacitance range Notes: 111 Capacitance value measured at 1 kHz. Intermediate capacitance values available on request. 121 Nominal dimensions. 131 Maximum tan(5) values. 141 Typical equivalent series resistance at 10 kHz. (5) Maximum r.m.s. current at 10 kHz, 0amb = 70°C for A0case< 20°C.

DC Link CapacitorsType KNG1910, KNG1914General characteristics Capacitance range Notes: 111 Capacitance value measured at 1 kHz. Intermediate capacitance values available on request. 121 Nominal dimensions. 131 Maximum tan(5) values. 141 Typical equivalent series resistance at 10 kHz. (5) Maximum r.m.s. current at 10 kHz, 0amb = 70°C for A0case< 20°C.

DC Link CapacitorsType KNG1910, KNG1914General characteristics Capacitance range Notes: 111 Capacitance value measured at 1 kHz. Intermediate capacitance values available on request. 121 Nominal dimensions. 131 Maximum tan(5) values. 141 Typical equivalent series resistance at 10 kHz. (5) Maximum r.m.s. current at 10 kHz, 0amb = 70°C for A0case< 20°C.

DC Link CapacitorsType KNG1910, KNG1914General characteristics Capacitance range Notes: 111 Capacitance value measured at 1 kHz. Intermediate capacitance values available on request. 121 Nominal dimensions. 131 Maximum tan(5) values. 141 Typical equivalent series resistance at 10 kHz. (5) Maximum r.m.s. current at 10 kHz, 0amb = 70°C for A0case< 20°C.

DC Link CapacitorsType KNG1910, KNG1914General characteristics Capacitance range Notes: 111 Capacitance value measured at 1 kHz. Intermediate capacitance values available on request. 121 Nominal dimensions. 131 Maximum tan(5) values. 141 Typical equivalent series resistance at 10 kHz. (5) Maximum r.m.s. current at 10 kHz, 0amb = 70°C for A0case< 20°C.

DC Link CapacitorsType KNG1910, KNG1914General characteristics Capacitance range Notes: 111 Capacitance value measured at 1 kHz. Intermediate capacitance values available on request. 121 Nominal dimensions. 131 Maximum tan(5) values. 141 Typical equivalent series resistance at 10 kHz. (5) Maximum r.m.s. current at 10 kHz, 0amb = 70°C for A0case< 20°C.

Applications Dimensions UPS SYSTEMS

DC Link Capacitors Construction, Cautions and Warnings Construction Dielectric: Polypropylene film Capacitor electrodes: Vacuum-deposited Casing: Plastic case with flame-retardant epoxy resin sealing (UL 94 V-0) Terminal: Parallel tinned copper, 2, 4 or 12 pins Internal construction First contact layer Second contact layer Polypropylene film dielectric Metallized layer Metal-sprayed contact layers Cautions and warnings Mechanical overloads Attention: The capacitor is designed for mounting on a PC board. Do not move the capacitor, after it has been soldered to the PC board.The capacitor...

Applications ■ Energy conversion ■ AC motor drives ■ Hybrid/electric vehicles ■ Inverter modules Features ■ Metallized self-healing polypropylen ■ Low ESR (high ripple current) ■ LowESL ■ Long lifetime ■ Rated capacitance ■ Rated DC voltage ■ Peak voltage ■ Nom. RMS current (@ Tamb = max. 80 °C ) ■ Max. RMS current (@ Tamb = max. 70 °C ) ■ Max. peak current ■ Equivalent series resistance @ 1 kHz ■ Equivalent series inductance ■ Max. pulse rise time Thermal characteristics Test methods & performances ■ Voltage test between terminals @ 25 °C 675 V/10 s ■ Voltage test terminals to case @ 50...