Innovative Capacitor Technologies for Power Electronics and Energy Storage #
Energy storage capacitors play a pivotal role in modern power electronics, supporting rapid energy discharge and reliable performance in demanding applications. Yuhchang offers a diverse range of energy storage capacitors, engineered for efficiency, durability, and compliance with international standards.
Energy Storage Capacitors: Dry Type (Series ESDS) #
Overview #
Yuhchang’s ESDS series energy storage capacitors are designed for high-performance discharge applications. Utilizing self-healing metallized polypropylene film and advanced dry technology, these capacitors achieve high dielectric strength and energy density up to 1J/cc. Their construction ensures low losses and reliable operation, making them suitable for applications requiring rapid energy release.
Key Features #
- Dielectric: Polypropylene, metallized for self-healing capability
- Energy Density: Up to 1J/cc
- Low Losses: Optimized for efficiency
- Low Self-Inductance: Connection terminals designed for high-frequency performance
- Longevity: Expected lifespan over 100,000 hours
- Reliability: Failure rate less than 100FIT
- Compliance: Meets IEC61071 and IEC61881 standards
- Construction: Non-magnetic stainless steel case, RoHS-compliant epoxy resin filling
Applications #
- Power electronics
- Renewable energy systems
- High-voltage power supplies
- Industrial equipment requiring fast energy discharge (e.g., laser systems, pulse power)
Technical Specifications #
| Characteristic | Value |
|---|---|
| Standard | IEC61071, IEC61881 |
| Capacitance Tolerance | ±10% (optional ±5%) |
| Rated DC Voltage | 900V to 40kV |
| Tangent of Loss Angle | < 0.1% |
| Self-Inductance (ESL) | < 100nH |
| Test Voltage (Terminals) | 1.5xUn / 10s at 25±5°C |
| Test Voltage (Terminals to Case) | 2xUn+1000VAC / 60s at 60Hz 25±5°C |
| Operating Temperature | -40°C to +70°C (optional 85°C) |
| Storage Temperature | -40°C to +85°C |
| Case | Rectangular, non-magnetic stainless steel |
| Filling Material | Epoxy resin (RoHS compliant) |
| Failure Rate | < 100FIT |
| Lifetime Expectancy | > 100,000 hours |
| Cooling Method | Natural |
Reference Dimensions #
Energy Storage Capacitors: Oil Type (Series ESAS/ESBS/ESCS/ESFS) #
Overview #
The oil-filled energy storage capacitors are tailored for discharge applications, with several series available based on dielectric and filling technology:
- ESAS: Paper dielectric + Aluminum foil + Castor oil
- ESBS: Metallized polypropylene film + Vegetable oil
- ESCS: Polypropylene film + Aluminum foil + Vegetable oil
- ESFS: Polypropylene film + Aluminum foil + PXE oil
Key Features #
- Dielectric: Paper or polypropylene film
- Rated DC Voltage: Up to 50kV
- Low Self-Inductance: < 100nH
- Construction: Rectangular, non-magnetic stainless steel case
- Filling Material: Varies by series (castor oil, vegetable oil, PXE oil)
- Natural Cooling
- Compliance: IEC 61071
Technical Specifications #
| Characteristic | Value |
|---|---|
| Standard | IEC 61071 |
| Capacitance Tolerance | ±10% (optional ±5%) |
| Rated DC Voltage | Up to 50kV |
| Self-Inductance (ESL) | < 100nH |
| Test Voltage (Terminals) | 1.25xUn / 10s at 25±5°C |
| Test Voltage (Terminals to Case) | 1.5xUn VAC / 60s at 60Hz 25±5°C |
| Operating Temperature | -40°C to +70°C (optional 85°C) |
| Storage Temperature | -40°C to +85°C |
| Case | Rectangular, non-magnetic stainless steel |
| Filling Material | According to series design |
| Cooling Method | Natural |
Example Specifications and Dimensions #
| Un DC (V) | Capacitance (μF) | Type | L (mm) | W (mm) | H (mm) | Ref. Fig | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 5000 | 4000 | ESAS | 420 | 340 | 880 | Fig-3 | 210 |
| 44000 | 52 | ESAS | 405 | 335 | 750 | Fig-4 | 151 |
| 900 | 4000 | ESBS | 340 | 125 | 215 | Fig-1/2 | 11.1 |
| … | … | … | … | … | … | … | … |
Reference Dimensions #
