VEMoDrive drive systems

Frequency converter & Power converter

Frequency converters are essential devices in modern drive technology that adjust AC frequency and voltage to control the speed and power of electric motors. This technology enables precise control and optimization of processes in various industries, resulting in energy savings and improved performance.

Features

Frequency converters are characterized by their ability to vary the frequency and voltage of the current, allowing flexible control of motors. They typically consist of a rectifier, an intermediate circuit, and an inverter that work together to produce the desired output frequency and voltage. Key features include the ability to save energy, improved process control and protection features such as overload protection and short circuit protection. Modern frequency converters also offer extensive communication interfaces for integration into automation systems and are available in various power and voltage ranges.

Applications

Frequency converters and power converters are used in a variety of application areas. In industry, they are used to control pumps, fans and compressors to optimize energy consumption and extend the life of machines. In conveyor technology, they enable precise control of the conveying speed of conveyor belts and cranes. Frequency converters also ensure efficient heating, ventilation and air conditioning systems in building technology. They are also used in water treatment, where they adapt pump performance to demand, and in renewable energy, particularly wind power, where they optimize generator performance. On synchronous motors and generators, excitation devices ensure the necessary regulation of the field and thereby offer regulation of the reactive power or the power factor.

Our range of services

The VEMoDRIVE drive system offers you a drive concept that is tailored to your application. Depending on the task and application, our offering ranges from analysis to after-sales service. The individual components are adapted to your requirements or existing systems. VEM offers a high level of expertise for your customer-specific project.

 

Low voltage converter

With VEMoDRIVE low-voltage converters, we supply you with complete electrical drive equipment, consisting of VEM motors, converters and transformers in the power range from 0.06 kW to 3,000 kW in low-voltage versions.

Technical details

Connection voltages

230V to 690V

Output power

0.06 kW to 3000 kW

Output power

0.55 kW to 1100 kW with regenerative converters

Network feedback

6-pulse, 12-pulse and low harmonic (LH)

Standards

EN60204-1, IEC61800-3:2004, CE, EAC (GOST R), UL on request, CNL

Options

EMC filter, dU/dt filter, brake chopper, temperature evaluation
 

Medium voltage converter

With VEMoDRIVE medium-voltage converters, we supply you with complete electrical drive equipment, consisting of VEM motors, converters and transformers in the power range from 200 kW to 40 MW.

Technical details

Connection voltages

1.0 kV to 13.8 kV

Output power

200 kW to 40 MW

Output power

12-pulse, 24-pulse and low harmonic (LH)

Network feedback

12-pulse, 24-pulse and low harmonic (LH)

Standards

EN60204-1, IEC61800-3:2004, CE, EAC (GOST R), UL, CNL

Options

EMC filter, dU/dt filter, brake chopper, temperature evaluation
 

Sub-synchronous converter cascade

With VEMoDRIVE SCC, VEM offers a sub-synchronous converter cascade for your slip ring motor. The USK is based on the series connection of an uncontrolled and a controlled converter in the rotor circuit of the three-phase asynchronous machine. It is used to return the slip energy to the supply network and can use intelligent control to set the speed of the motor in an energy-efficient manner.

VEMoDRIVE SCC can basically be used in all branches of industry, preferably where there are no requirements for high control dynamics and a limited speed adjustment range is sufficient. This applies, for example, to the drive of centrifugal compressors, fans and rotating pumps. The preferred power range is between 500 kW and 12 MW. By using a VEMoDRIVE SCC, a significant energy saving can be achieved compared to volume adjustment via throttles, e.g. in water pumps. The same applies in comparison to the speed setting with the help of additional rotor resistors.

It is particularly advantageous to retrofit existing drives with slip ring motors into a controlled drive using VEMoDRIVE SCC. In addition to the USK, VEM also supplies resistance starters, transformers and switching technology

 

Softstarter

If speed or torque control is not required in applications, but a limitation of the starting current is required, soft starters are used. They limit the starting current and thus the network load by starting the motors in a controlled manner up to the rated speed. The integrated bypass then switches the motors to the mains and thus enables low-loss operation of the motors at a constant speed.

In addition to the bypass installed as standard, VEMoDRIVE soft starters have other functions such as torque-controlled start and stop modes for gentle starts at low current and pump stops without pressure shocks. The dynamic vector braking method can be used to brake machines with high moments of inertia in a controlled manner.

In addition, VEMoDRIVE soft starters offer a variety of other useful features. This includes monitoring functions for detecting load deviations and the possibility of remote control and diagnosis via communication interfaces. This enables easy integration into modern automation systems and improves ease of maintenance. The adaptability of soft starters to different motors and load conditions makes them particularly versatile and reliable in operation. Another highlight is the ability to adjust acceleration and deceleration times to meet the needs of specific applications. In this way, mechanical stress on the system can be minimized and the service life of the entire system can be extended.

 

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