Thyristor technology, self-cooled

Application
Thyristor technology with synthetic cooling is used in numerous industrial and electrochemical processes. Typical applications include the anodizing of aluminum, classic zinc electroplating, and the electropolishing of stainless steels. Furthermore, this technology is particularly suitable for special applications in environmentally critical or demanding operating environments where reliable and self-sufficient cooling is required.

Product Description
Thyristor technology is one of the most proven technologies in industrial DC power supply and has convinced for decades with an excellent cost-benefit ratio. The self-cooled version with synthetic coolant enables autonomous operation without additional external cooling measures – ideal for so-called island operation. This thyristor power supply combines wear-free power adjustment with stable and dynamic process flows. As an ECO DC power supply system, it can be flexibly and easily integrated into existing plant concepts, especially in the small to medium power range.

For maximum adaptability, thyristor technology is also available in other cooling variants – including air-cooled, water-cooled, and combined solutions with synthetic coolant.

Customer Benefits
Thyristor technology is particularly popular in the medium to high power range, from approximately 2,000 A up to ≥ 20,000 A. Easy to handle and forgiving in harsh industrial everyday use, this technology enjoys great trust worldwide.

Interfaces

Analog setpoint and actual values 0 – 10 VDC
Optional: 0 – 20 mA, 4 – 20 mA; Profibus DP, ProfiNET, etc.

Technical data

Mains voltage: 3 x 400 V / 50 Hz + N + PE

Output current: > 2,000 A – 20,000 A

Output voltage: 6 V – 500 V

Ripple (standard): approx. 5% – 7% at full output

Ripple (option): 1% – 3% in the desired control range

Duty cycle: 100% (24/7)

Efficiency: 80% – 93%

Ambient temperature: +35°C, > +40°C (option)

Cooling: Synthetic coolant

Protection rating: IP54 tank / IP23 device hood

FAQ

How is grid coupling implemented in Munk thyristor rectifiers?

Grid coupling can be implemented as a 6-pulse or 12-pulse design. 12-pulse systems reduce grid feedback and ensure more harmonious load conditions. The selection is based on the grid environment, existing infrastructure, and required process quality.

What is the difference between Thyristor and PSP-8-300?

MUNK rectifiers are available in various technologies to optimally respond to different process requirements. Thyristor rectifiers are characterized by robustness and proven reliability, ideal for applications with high energy demand or constant loads. The PSP-8-300 is based on modern SiC technology and offers fast response times, precise control, higher energy efficiency, and low ripple, making it particularly suitable for process-sensitive applications such as anodizing.

What output currents can be achieved with ECO thyristor technology?

ECO thyristor technology covers an output current range from 2,000 A up to 20,000 A, with output voltages from 6 V to 500 V.

What is the ripple of the oil-cooled thyristor units?

The standard ripple is approx. 5-7% at full output. Optionally, a ripple of 1-3% can be achieved in the desired control range through smoothing elements.

How much oil does the smallest ECO thyristor unit require?

The smallest enclosure (type F1) requires approx. 160 kg of synthetic coolant (oil). The exact amount depends on the unit size and is documented in the type overview.

Do you require individual consultation or

a solution tailored to your application?

Please feel free to contact us for a personal product inquiry.