Uninterruptible AC Motor Drives - UMD™ (UPS-VFD)

Our UMD™ systems are ideal for critical processes, where interruptions to the power supply may cause serious damage or loss in production. They secure the AC motor drive, maintain full effect if there is a power shortage and create reliable, secure and profitable operations.
Uninterruptible variable frequency drive C100

UMD (UPS-VFD) is the most reliable way to power your AC motor

Supplying motors with the correct power during critical operation means the difference between profit and downtime costs, the difference between running machines and mechanical failures, and the difference between planning ahead and planning urgent field service.

UMD™ systems utilize proven and field tested uninterruptible power supply principles that achieve unmatched reliability.

When it simply has to work, we have the solution

When you want to make sure that delicate processes that require high reliability simply do not break down, regardless of any possible utility power disturbance – choose our UMD™ system.

The UMD™ system runs continuously and switches instantly between mains and battery operation if the regular power supply goes down. Consequently the UMD™ supplies full power all the time and there is no need for start-up, as there is for a standby DC motor, which requires additional equipment to compensate for the lack of pressure during start-up. Faster and simpler maintenance through the use of standard units enables shorter downtime for servicing.

This means a quicker start, a higher availability and reductions in maintenance costs compared to if you use an extra standby system or a DC motor. And, since your operation can now be conducted more securely and reliably, you can focus on your core business and benefit financially from it as well.

In-line Integrated VFD’s allow precise motor control

UMD™ utilizes field-proven, high-quality VFD’s. All the advantages of VFD operation also applies to the UMD™. That includes: limiting start currents, starting at maximum torque, precise speed control, energy savings etc. At Direct On Line start of an induction motor, the inrush current can be up to 9 times of the nominal current. The UMD™ with its internal VFD solves the problem and realize the motor’s full potential.

VFD curve for UMD

Eliminates Single Point of Failure

The UMD™ system is designed to remove all Single Points of Failure. Traditional UPS systems must be doubled or excessively oversized to achieve the same safety level.

Complete factory tested UMD™ system

UMD™ is delivered as one complete MCC-unit. Type tested according to IEC, UL, CSA and other applicable standards. The system has single or redundant mains input breakers, battery charger, AC and DC busbars, and the required motor drive outputs. In addition, it can be extended to backup all AC and DC auxiliary loads.

As a result of this several complex engineering activities including battery sizing, power loss calculations, motor protection settings, fuse selectivity in distribution board, can be eliminated. It also allows for fast and straightforward installation and commissioning that can be performed by local technicians.

Typical applications for UMD™ (with VFD)

Our solutions are designed for applications in power generation, hydro-, wind-, oil- and gas industry – sometimes in tough environments and harsh conditions. Typical drive applications are pumps, fans, valves and sluice gates.

Uninterruptible VFD C100

Uninterruptible AC motor drive type UMD™ C100

UMD™ C100 is an uninterruptible drive system for three phase AC-motors from 2,2kW up to 30kW. UMD™ C100 is intended together with an external DC system 110/125VDC or 220VDC to provide uninterruptible motor drive and an AC-input as an option.

UMD™ System type C100

Uninterruptible motor drive (with VFD) type UMD™ S400

UMD™ S400 is a system intended for the uninterruptible operation of three phase AC-motors from 3kW up to 200kW. It is based on frequency converters that can be powered not only from the existing mains drive but also from batteries. The system contains the required number of drives, battery and internal distribution of AC, DC power and control circuits. The system is fed by one single or dual mains supply. Each output to the electrical motor is fully controlled by bus or hardwired interface and protection of cable and motor.

UMD™ System type S400
Uninterruptible Motor Drives - UMD

Our Experts

Peter Knutsson - +46(0)470 705 200

David Persson - +46(0)470 705 200

Arvid Mårtensson - +46(0)470 705 200

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