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![](https://cedrat-technologies.com/wp-content/uploads/2023/04/Micromoteurs_et_micro-actionneurs_piezoelectriques_de_puissance-5.jpg)
Micromoteur et micro-actionneurs piezoélectriques de puissances
1 January 2002
The applications of piezoelectric actuators are spreading in various fields such as precise micro-positioning, shape control or vibration generation, control or damping.
![](https://cedrat-technologies.com/wp-content/uploads/2023/04/Actuator2004_P25_Micromotor_based_on_film_permanent_magnets-5.jpg)
Micromotor based on film permanent magnets
19 June 2023
A design of a single phase step micro motor is presented. The rotor has been optimised to induce the greatest magnetic energy using film permanent magnets. A special study has been performed to select the most advantageous magnetisation direction and the structure has been chosen taking into account micro technologies characteristics and the present know-how available for realisation of prototypes. A scale 2 prototype has already been realised. Its special air gap tuning for film magnet test is presented, as well as first torque measurements.
![](https://cedrat-technologies.com/wp-content/uploads/2023/04/mspa_long_course-5.jpg)
Module Stepping Piezoelectric Actuator: A versatil way of micro-positioning actuation
10 January 2016
Stepping Piezoelectric Actuators (SPA’s) – based on the Piezoelectric Friction-Inertial Actuation (PFIA) principle – are made from Cedrat Technologies Amplified Piezoelectric Actuators (APA). They use the stickslip principle to couple high resolution positioning (cm) and low volume (10cm), allowing easier multi-DoF mechanism developments and miniaturization possibilities – is presented. Results obtained on three innovative engineering models – linear long stroke, rotary and three-DoF actuators – are presented, giving the reader actual benefits of this concept and allow addressing new applications such as consumer goods and medical devices.
![](https://cedrat-technologies.com/wp-content/uploads/2023/04/SSC_2002_Rotating_Piezo_Actuator_for_High_accuracy_positioning_in_space_applications-5.jpg)
Rotating piezo actuator for high accuracy positioning in space applications
7 January 2002
Piezo-electric motors have been successfully developed for various applications like autofocus drives in camera lenses and handling equipment for semiconductor production. Their high speed and accurate positioning capability, combined with a favourable holding torque in unpowered condition, make piezo motors also very attractive for actuation purposes in spacecraft mechanisms. However, so far only a few studies have been reported considering their suitability for actual use in space.
![](https://cedrat-technologies.com/wp-content/uploads/2023/04/3D_ultrasonic_imaging_Probes_rpm60-5.jpg)
3D ultrasonic imaging probes
1 January 2001
Implementation of 3D capabilities on ultrasonic imaging systems tantalizingly proves the high interest for this diagnosing modality. However, to become a clinical tool, 3D ultrasound has to spend further technological efforts in acquisition performance and probe size to deliver on the fly, quality volumetric images as well as current functionalities.
![](https://cedrat-technologies.com/wp-content/uploads/2023/04/Actuator2004_P89_Rotating_piezoelectric_motors_for_high_precision_positioning__space_applications-5.jpg)
Rotating piezoelectric motors for high precision positioning & space applications
19 June 2023
Piezo-electric motors have been successfully developed for various applications like autofocus drives in camera lenses and handling equipment for semiconductor production. Their high speed and accurate positioning capability, combined with a favourable holding torque in unpowered condition, make piezomotors also very attractive for actuation purposes in spacecraft mechanisms. The paper introduces a new concept of a versatile ultrasonic piezomotor. The testing campaign carried out on the designed rotating piezomotor has validated the vacuum compatibility and the lifetime of the motor in air.