Dry-Type High-Voltage Film Capacitor Assembly & Testing Line

Dry-Type High-Voltage Film Capacitor Assembly & Testing Line

The dry-type high-voltage DC-Link film capacitor features a stainless steel housing with resin encapsulation. It offers low ESR, low parasitic inductance, high ripple current capability, and excellent resistance to vibration and wide temperature variations. Commonly used in DC-link voltage stabilization, ripple suppression, and energy buffering in converter systems, this capacitor is well-suited for high-power inverters, high-voltage drives, and grid-connected converters, reliably performing under demanding conditions such as shock loads and thermal cycling.

Key Processes

Product Turning

Automatic Busbar Bending

Automatic Reflow Busbar Welding

Insulation Paper Installation

Capacitor Polarity & LCR Test

Inter-Electrode Dielectric Withstand Test

Inter-Electrode Insulation Resistance Test

Electrode-to-Shell Withstand Voltage Test

High-Voltage Capacitance and Dissipation Factor Test

Partial Discharge (PD) Test

Automated Optical Inspection (AOI)

Product Features

The assembly line operates in a semi-automatic mode, achieving over 2× improvement in production efficiency.

Key busbar welding processes are fully automated.

The test trays feature a flexible design, accommodating various product configurations including series, parallel, and delta (triangular) connections.

Safety compliance testing covers voltage levels up to 20 KVac and 15 KVdc.

High-voltage capacitance and dissipation factor testing supports charge/discharge ratings up to 300 Vac and 1200 A.

Automated Optical Inspection (AOI) for visual quality assurance.