Active ULTRASONICS.....Providing Innovative Ultrasonic Solutions

Fixed Frequency Systems:

• When matched with our Fixed-Frequency generators the ring resonators must be tuned to operate at the system resonant frequency.

Multi-Frequency Systems:

Active Ultrasonics now offers the industry’s most advanced ultrasonic technology for sieving and screening applications. When properly adjusted our patented MMM (Modulated, Multimode, Multifrequency) ultrasonic generators can stimulate highly efficient wideband (sonic to megahertz) acoustic energy to nearly any sieve or screen shape. Key benefits to the MMM ultrasonic technology are:

• Wideband (sonic to megahertz) acoustic energy provides greater sieve/screen stimulation to improve process volumes (kg/hr) beyond the limitations of standard fixed frequency systems.

• MMM eliminates the standing waves seen in fixed frequency systems.

  • Eliminates binding in low amplitude nodal points

  • Eliminates damage to screens in high amplitude nodal points.

• By eliminating hot spots on the screen we can increase power to the entire screen and improve the rate of material processing.

• Fully programmable power and modulation technology

  • Power adjust 1% to 100% (standard power modules in 300 watts, 600 watts, 1200 watts, and up to 20 kW on request)

  • Pulse Width Modulation Period (Period 10 ms to 1,000 ms)

  • Pulse Width Modulation Ratio (0% to 100%)

  • MMM special modulation settings (fast sweeping, sweeping, & tracking)

• Programmable features allows greater processing flexibility with all kinds of powders and especially sticky and difficult powders.

• MMM technology will drive most any shape (round, oval, square, rectangle) sieve or screen, even large mass systems.

• MMM converters may be connected to most any efficient point on the sieve/screen or frame.

• A field adjustable resonant frequency option allows frames, rings, and resonators to be built without specific tuning. This means resonators designs can be simplified and produced at lower cost.

• The MMM system can adapt to most any other manufacturers installed sieving transducer and screen allowing a simple field upgrade.

Click To See Sieving Video:

Windows .WMV format (227 Kb)

Example Round Sieve Screen shown with OEM Open Frame MMM Generator and Handheld Programming Unit

Example Square Screen

• MMM Frequency Agility: The same DSP technology that allows the MMM generator to be adaptable to any shape sieve or screen is used to provide unprecedented frequency agility. Other fixed-frequency systems are driving the total acoustic system (converter & screen frame) at a frequency optimized for the converter without full consideration of how the screen frame is changing the whole system resonant frequency. Rather than fighting physics our systems are adapting to the new resonant frequency when an un-tuned mass (the screen frame) is attached to a converter. Normal MMM factory options allow for system resonant frequency adjustment within a 12 kHz window (e.g. 25 kHz to 37 kHz). Such agility allows fine tuning for optimum performance.

• MMM Converter Agility: Additional system flexibility is provided through adaptive inductive compensation that allows attachment and efficient driving of converters from other manufacturers. This allows us to improve existing ultrasonic systems through a simple MMM retrofit.