CEDRAT TECHNOLOGIES unveils mega-powerful SA75 switching amplifiers

It also includes energy-recovery capacities, allowing consumption to be reduced by a factor of 10. An advantage of the new SA75X amplifier is the low level of active power taken from the grid with respect to the high reactive power supplied by the piezo load. This has been made possible thanks to the exceptional yield obtained through the SA75X amplifier''s energy-recovery capacities. This opens up opportunities in fields using embedded applications, such as aeronautics. The SA75D is the most powerful amplifier on the market for piezo actuators. It is able to produce an average alternating current output of up to 20A at 170V peak to peak, representing a world record for low-voltage piezo drivers. This 20-amp current can be maintained indefinitely. Compared with the LA75C linear amplifier, this high-intensity amplifier will help to increase piezo-actuator speed and amplitude by up to a factor of 10. It will also help to control the largest piezo stacks (C>100uF) under dynamic conditions of permanent operation. The amplifiers provided by CEDRAT TECHNOLOGIES are designed to switch at very high frequencies (typically 100kHz) and include an optimised-voltage closed loop to ensure that the output voltage waveform is as ordered. These aspects provide a high resolution, which yields a highly satisfactory signal-to-noise ratio (SNR>60dB). The switching power amplifiers are compatible with RK racking products and perform in either a linear continuous state or purely On/Off states when applied to piezo actuators with extremely fast actuations. The switching technique allows high current peaks, required by impulse or by high-frequency applications on large piezo actuators. Further benefits of the SA75X amplifier are its range versatility, featuring three versions (SA75A, B and D) that can manage single or multiple channels, and its compatibility with all CEDRAT TECHNOLOGIES electronic (SG, ECS, UC45 and UC65) ranges. The SA75 range of amplifiers has applications in such sectors as aeronautics (flap actuation, fast valves, etc.), energy, large instruments (shakers, fatigue testing, etc.), microelectronics, optronics, photonics, production machinery (anti-vibration and vibration-assistance machinery), and space.