Major Ventilation Drive
Software Release

Commissioning a new motor usually takes time, testing, and specialist knowledge. Thanks to a new AutoTune function, updated DV drives accelerate the process.

By connecting the DV PC Tool and entering basic motor nameplate data, you can now direct the drive to automatically identify the motor parameters required for high-performance field-oriented control of PMSM motors.

The result is faster setup, less dependency on expertise, and more consistent motor behavior. Sinc inductance is measured at higher current levels, inductance saturation is also reduced, improving control accuracy across the operating range.

Many modern motors generate torque not only from permanent magnets, but also from magnetic saliency. The new Maximum Torque Per Ampere (MTPA) control algorithm enables the DV drive to fully exploit this.

By continuously selecting the optimal current vector, the drive delivers the required torque using less current. This means lower losses, reduced heat generation, and improved efficiency – typically translating into lower energy consumption and extended component lifetime, especially in systems with long operating hours.

While most ventilation systems operate at higher motor speeds, large fans in cooling towers and similar applications often run well below 350 rpm. This places different demands on the control algorithm.

Our updated ventilation drives now include enhancements that ensure smooth torque delivery and stable speed control at very low speeds. Control limits have been adjusted from percentage-based values to absolute minimums, and gain calculations have been optimized accordingly – allowing the drive to support a wider range of applications without sacrificing stability or performance.