Use the piezo linear amplifier to drive a capacitor that is equal to the capacitance of the piezo actuator and rated for high voltage levels. ![]() Prior to connecting the piezo stack in the FPA actuator to the piezo linear amplifier device, DSM recommends auditing the analog signal. How do I confirm a third party amplifier is suitable? Typical dynamic operation of a Flextensional Piezo Actuator (FPA) device involves an analog output device (e.g., function/signal generator, data acquisition card) and a piezo linear amplifier. What do I need to operate a piezo actuator? At higher humidity levels, prolonged DC voltage can lead to stack degradation. Use the voltmeter to verify that the input signal is within the actuator’s rated voltage range (i.e., -30 V to +150 V). The input voltage can be adjusted until the desired displacement level is achieved. The actuator can be operated at static or near-static conditions using only a power supply and a voltmeter. Can I use a power supply to operate a piezo actuator? Piezoelectric materials are very responsive, and high frequency drive signals can cause the material to experience damaging tensile stresses. When operating a piezoelectric actuator, take care not to subject the device to voltage spikes at or near maximum voltage, (which can occur when turning on an amplifier), as these spikes can also damage the piezo stack. It is preferable to drive the actuator with a sine wave as input for high frequency actuation, because the extremely high-frequency components of square waves and triangle waves will decrease the expected life of the piezo stack, eventually leading to premature stack failure. The recommended voltage limit for DSM’s standard piezoelectric stack is a signal operating between -30 V and +150 V DC. What are a piezo actuator's voltage limits? Note that isopropyl alcohol may have high levels of water and should not come in contact with the actuator. Humidity levels must be reduced to 0 to 50%. All water and alcohol liquid must be removed prior to operation. DO NOT: allow the piezo within the actuator to come in contact with water.Prying or twisting of the actuator frame may damage the mechanism. DO NOT: introduce tensile loading into actuator frame.DSM recommends using only DSM piezo amplifiers with DSM piezo actuators. Extreme voltage changes may occur if a power plug is pulled or a piezo amplifier “overvoltages” or “undervoltages” the piezo actuator. ![]() Accidental, extreme voltage changes may damage the piezo material within the actuator.(If rapid response is required, DSM recommends using a half-sinusoidal transition with frequency not exceeding 50% of the actuators first natural frequency corresponding to the loaded condition). DO NOT: drive an actuator with a step input or square wave.DO NOT: introduce lateral or transverse loading of the actuator’s output pad or mounting point that exceeds 5% of the actuator’s blocked force rating.DO NOT: introduce loading conditions that create bending moments in the actuator’s frame.DO NOT: cycle the actuator beyond 80% of the first natural frequency corresponding to the load condition.DO NOT: drive the actuator in a way that creates impacts between the actuator and other rigid surfaces.DO NOT: introduce static compressive loads exceeding 100% of an actuator’s blocked force rating.Improper uses include but are not limited to applications such as the following examples: The piezo actuators can easily be damaged from improper use and/or exposure to harmful environments. How do I prevent damaging the piezo actuator?ĭSM’s flexure-guided piezoelectric actuators incorporate advanced materials and engineering for precision motion. What are the preferred environmental operating conditions for piezo actuators?.How should a piezo actuator be mounted?.How does piezo hysteresis affect the actuator?.How does signal electronics noise affect a piezo actuator?.Why is the operating frequency limited to ½ of the unloaded resonant frequency?.How do I confirm a 3rd party amplifier is suitable?. ![]() What do I need to operate a piezo actuator?.Can I use a power supply to operate a piezo actuator?.What are a piezo actuator’s voltage limits?.How do I prevent damaging the piezo actuator?.If you have a custom unit or unique applications please send us an email, we are happy to help you select the best hardware for your application. Note that answers are for typical/standard units. We have gathered answers to the following set of our frequently asked questions (FAQ).
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