1000V Variable Speed Drive (VSD)

The reduced motor winding stress is a result of the three-level switching multi-step voltage waveforms, which are one-half of a traditional two-level switching VSD. The reduced voltage steps, and lower line-to-line voltage decrease the non-uniform voltage distribution among motor winding turns reducing stress in the insulation material. The reduced voltage steps also significantly reduce motor shaft voltages and bearing currents which allow larger motors to be used with standard bearings.

Figure 1 below shows a comparison between three- level and two-level voltage waveforms, with the three-level producing a significantly improved sinusoidal curve (waveform).

SMEC’s custom in-house designed and built enclosures house the 1000V Three-Level VSDs. Enclosures are built specifically for harsh conditions and high ambient temperatures typical in underground mining and tunneling environments.

Standard 1000V VSD Enclosures include an inline reactor and DC Bus chokes for harmonic mitigation.

Local and remote control of the 1000V VSD panels is via an HMI unit. The HMI unit additionally provides local and remote access to the VSD control firmware, allowing VSD control parameters to be monitored remotely.

This versatile solution is perfectly suited for mining and underground operations, industrial processes, HVAC systems, and renewable energy applications. It enables a smooth motor start-up by gradually ramping up voltage and frequency, ensuring a soft start while optimizing performance to meet specific application demands.

With a focus on energy efficiency, it helps reduce power consumption and operational costs while minimizing wear and tear, extending motor lifespan, and lowering maintenance expenses. Proven to perform reliably in harsh and demanding environments, such as underground mining, it provides increased confidence in motor operation without unexpected downtime.

Our Variable Speed Drives stand out for their robust design, featuring custom-built enclosures that guarantee durability and reliability. They offer seamless integration with advanced communication protocols, ensuring compatibility with various systems. Backed by proven technology with a track record of long-term success in critical applications, they provide industries worldwide with consistent performance and reliability.