High-Voltage Frequency Converters

Reducing energy consumption and the efficient use of resources have become priorities for the modern industrial sector, where powerful electric motors bear the brunt of the load. Businesses are increasingly adopting high-voltage equipment for flexible current control. Below, we’ll explore the hidden capabilities of inverters, how they differ from other models, and the engineering criteria for selection that can lead to significant cost savings.

What are high-voltage frequency converters: specifications and advantages

An industrial high-voltage frequency converter is a cascade-type power electronic device designed for smooth starting, stopping, and frequency control of high-power three-phase synchronous and asynchronous motors. These systems are designed to operate in networks with rated voltages of 3.3 kV, 6 kV, 6.6 kV, or 10 kV and serve drive systems with power ratings ranging from 315 to 20,000 kW.

Key engineering advantages of high-voltage units:

• energy savings of up to 50% in ventilation, water, and heating systems;
• full electromagnetic compatibility in accordance with international standards;
• no negative impulse effects on the insulation of motor windings;
• minimal inductive heating of the electric motor during operation, which fully preserves its standard operating conditions;
• an ergonomic touchscreen control terminal with a 10-inch diagonal;
• built-in automatic bypass function for uninterrupted operation in the event of a power unit failure.

These technical features ensure reliable protection of equipment and stability of the entire enterprise’s electrical network.

Application of high-voltage frequency converters

Thanks to its reliability and ability to handle extremely high power, this equipment is indispensable in heavy industry. It provides precise control of parameters in previously unregulated technological processes, completely replacing outdated DC drives. A detailed overview of the company’s full range of available power electronics can be found in the section featuring all industrial frequency converters.

Key areas of high-voltage device integration:

1. Mining, mineral processing, and metallurgy industries: control of high-power mills, crushers, conveyor lines, and exhaust fans.
2. Power generation and thermal power plants: automation of grid, feed, and circulation pumps, as well as blast fans and exhaust fans.
3. Water utilities and municipal services: smooth control of main water-lifting pump units, minimizing the risk of water hammer in pipelines.
4. Chemical and oil refining industries: control of large compressor units, mixers, and pumps for transferring process fluids.

The wide range of applications demonstrates the versatility of automated asynchronous and synchronous electric drive systems in modern industry.

How do high-voltage frequency converters differ from low-voltage ones?

The main difference between these classes of devices lies in their operating voltage and architectural design. While standard low-voltage frequency converters operate at voltages up to 1,000 V and are used for low- and medium-power motors, high-voltage systems control heavy-duty equipment in the 3.3–10 kV range.

A high-voltage regulator is built using a more complex cascaded circuit consisting of series-connected single-phase inverters based on potential-free IGBT modules. This topology allows the required high voltage to be generated directly at the device’s output without the use of additional step-up output transformers.

How to choose a high-voltage frequency converters

Before purchasing a high-voltage frequency converter, it is necessary to conduct a thorough analysis of the drive system’s parameters and operating conditions. The main selection criteria are the nominal line voltage, motor power, and maximum output current. The device’s overload capacity, typically 120% for 120 seconds, should also be taken into account.

It is important to determine the type of cooling system—forced air or liquid cooling with an external chiller. If there are space constraints at the site or the equipment is to be installed outdoors, it makes sense to choose ready-made container solutions that protect the electronics from dust and moisture.

Benefits of ordering high-voltage frequency converters from Dalgakiran

Dalgakiran guarantees that its equipment fully complies with technical standards and offers original units directly from the manufacturer. Thanks to direct shipments, the final price of a high-voltage frequency converter remains transparent and optimal for large-scale industrial projects. For machinery with heavy-duty starts, where constant speed control is not required but a start without voltage drops is needed, alternatives in our catalog include soft starters.

Our service advantages:

• turnkey project implementation—from technical audits of electric drives and design to installation and commissioning of systems;
• conducting pneumatic audits of the customer’s facilities;
• continuous 24/7 service support and rapid response from mobile engineering teams that travel to 11 regions of Ukraine.

By integrating cutting-edge engineering solutions, our team ensures the stability of Ukrainian industry and contributes to overall economic resilience, because when it matters most, everything works with Dalgakiran.

Delivery across Ukraine:

Courier (by our company)

Pick up yourself, or we will organize delivery throughout Ukraine.

Payment methods:

Cashless payment.