CEDRAT TECHNOLOGIES Unveils Mega-powerful Sa75 Switching Amplifiers
CEDRAT TECHNOLOGIES of France, in partnership with G2ELab, has developed a new range of powerful amplifiers using switching amplifier technology. The company's SA75D model is the most powerful amplifier on the market for piezo actuators and is designed for applications that demand reactive power (anti-vibration, fast actuation, vibration generation, etc.) such as aeronautics, machine tools.
- (1888PressRelease) September 30, 2014 - CEDRAT TECHNOLOGIES of France develops high-performance, cutting-edge actuators and piezoelectric motors. Its new SA75 range of switching amplifiers has been designed to harness the performance of its powerful piezo actuators (APA® and PPA in L and XL) from -20V to +150V under dynamic conditions. It also includes energy-recovery capacities, allowing consumption to be reduced by a factor of 10.
Traditionally, piezoelectric actuators are used at low frequencies for optical-positioning systems, but new dynamic-actuation requirements have been introduced into fields such as aeronautics (flaps) and machine tools (vibration assistance). When static, actuators may be adequately supplied by a linear amplifier thanks to their low noise and harmonic distortion.
The LA75C linear amplifier, developed by CEDRAT TECHNOLOGIES, is a perfect example of this, but its main drawback is the power consumed - hence, dissipated - which makes it necessary to have a large heat sink for limited power output (maximum 2.4A at 170V peak to peak for the LA75C). 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 where embedded applications are used, such as aeronautics.
High-power linear amplifiers cannot be miniaturised but, compared with competing technology, CEDRAT TECHNOLOGIES' piezo actuators are relatively compact in terms of the mechanical energy that they are able to produce. In order to fully exploit this advantage, it is necessary to miniaturise the drivers, more particularly for embedded applications. It is for this reason that CEDRAT TECHNOLOGIES has developed a new range of powerful amplifiers using switching amplifier technology.
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 C) that can manage single or multiple channels, and its compatibility with all CEDRAT TECHNOLOGIES electronic (SG, ECS, UC45 and UC65) ranges.
As with all CEDRAT TECHNOLOGIES' products, 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.
The development of the SA75 range was made possible thanks to co-operation between CEDRAT TECHNOLOGIES and the Grenoble Electrical Engineering Laboratory (or G2ELab), part of the Université Joseph Fourier (UJF), in Grenoble (in south-eastern France). The project itself was an aspect of the broader AVIBUS and PPSMPAB project, involving business, R&D, high-tech players and academia across the region.
On the strength of its experience in the sector and high customer satisfaction, CEDRAT TECHNOLOGIES is pursuing and intensifying its international development, currently focusing on Europe, especially Germany, Italy, Russia and the UK.
About CEDRAT TECHNOLOGIES
CEDRAT TECHNOLOGIES is located in the French Innovation Valley near Grenoble, in south-eastern France. The company specialises in mechatronic systems, smart actuators, smart sensors, and detection systems. CEDRAT TECHNOLOGIES also runs training courses focused on advanced technology.
SPA motors and APA® actuators are protected by several broad patents filed by CEDRAT TECHNOLOGIES.
The technological advances made by CEDRAT TECHNOLOGIES and its capacity for innovation in mechatronics have earned it many awards for innovation, including prizes received from French government agency BPI and from INPI (the Institut National de Propriété Industrielle, i.e. the French National Industrial Property Institute).
The company will attend the following trade shows in the USA, in 2015: PHOTONICS WEST, from 10 to 12 February, in San Francisco, and DSS DEFENSE & SECURITY, from 21 to 23 April, in Baltimore.
For further information about the company, please go to: www.cedrat-technologies.com.
For further information, please contact :
Ms Kate RILEY - Press Officer
UBIFRANCE Press Office in London
SW1Y 4SP - UK
Tel: +44 (0) 207 024 3640
kate.riley ( @ ) ubifrance dot fr dot
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