PiezoDrive PDU210 Manual And Specifications

210 watt ultrasonic driver

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PDUS210 - 210 Watt Ultrasonic Driver

Revision History

Date

Revision

16/12/22 2

20/12/22 3

28/04/23 4

20/10/23 5

04/07/24 6

PDUS210 V5 Manual

Manual and Specifications

Hardware Version 5

Changes

Public document created

Updated unipolar section, fixed broken cross-references

Frequency modulation, calibration, multi-device support

Added impedance matching

Published

Modified 5/07/2024

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Page 1 PDUS210 - 210 Watt Ultrasonic Driver Manual and Specifications Hardware Version 5 Revision History Date Revision Changes 16/12/22 2 Public document created 20/12/22 3 Updated unipolar section, fixed broken cross-references 28/04/23 4 Frequency modulation, calibration, multi-device support 20/10/23 5 Added impedance matching 04/07/24 6 Published PDUS210 V5 Manual...
Page 2: Table Of Contents
Contents Introduction ..........................3 Safety Warnings ..........................3 Delivery Contents .......................... 3 Quick Start Recommendations ...................... 4 Electrical Specifications ......................... 4 Standard Output Voltage Ranges ....................4 Unipolar Output Voltage ....................... 7 Mechanical Specifications ......................4 PDUS210-FLEX Specifications......................8 Introduction to Ultrasonic Transducers..................9 PDUS210 Operation ........................
Page 3: Introduction
1 Introduction The PDUS210 is a complete solution for driving and analysing ultrasonic actuators up to 210 Watts. Functions include high-speed resonance tracking of both series and parallel resonance modes, vibration amplitude control, pulsed excitation, frequency modulation, and analysis functions such as impedance and frequency response measurement.
Page 4: Quick Start Recommendations
No dust or water ingress protection [2] [1] A 3D Model is available at www.piezodrive.com [2] The PDUS210 requires clean air for cooling. An air-filtration unit is available for contaminated environments. Contact PiezoDrive for details. PDUS210 V5 Manual Modified 5/07/2024...
Page 5 7 Standard Output Voltage Ranges The specifications for fixed output models are listed below. Voltage Voltage Amps Amps Optimal Load Range Frequency Order Code pk-pk pk-pk Load (��) Ohms [1] PDUS210-800 0.71 260 – 840 20 – 200 PDUS210-600 0.92 146 –...
Page 6 The impedance ranges for other common power levels are listed in the following table. For example, all amplifiers will supply more than 150W with a normalized load impedance between 0.71 and 1.4. For the PDUS210-400, this is equivalent to 71 Ohms and 140 Ohms. ��...
Page 7: Unipolar Output Voltage
8 Unipolar Output Voltage The output voltage of a standard PDUS210 or TX210 device is bipolar. For example, the maximum output voltage of the PDUS210-200 or TX210-200 is +/-100V. The PDUS210 and TX210 can also be configured with a positive or negative unipolar output range using the order code suffix –UnipolarPositive or –UnipolarNegative.
Page 8: Pdus210-Flex Specifications
9 PDUS210-FLEX Specifications The PDUS210-FLEX is identical to the standard PDUS210 except that it requires an external transformer connected between the amplifier and transducer using the supplied cable. This allows the user to switch between different output voltage ranges by changing the external transformer. For operating instructions, please refer to PDUS210-FLEX Operation.
Page 9: Introduction To Ultrasonic Transducers
An introduction to the behaviour and operation of ultrasonic transducers can be viewed at • https://www.piezodrive.com/ultrasonic-drivers/intro-ultrasonic/ Please familiarize yourself with these concepts before operating the PDUS210. The most important concept to understand is the relationship between the electrical and mechanical impedance response of a transducer.
Page 10 11 Reactive Compensation Extra topic to be added at later date. 12 Impedance Matching Extra topic to be added at later date. PDUS210 V5 Manual Modified 5/07/2024...
Page 11: Pdus210 Operation
13 PDUS210 Operation 13.1 Overview The operating principle of the PDUS210 is summarized in Figure 5. The transducer on the right is connected to the output transformer. The transformer converts the internal +/-24V drive voltage to the desired output voltage range, for example +/-200V. By default, the output connection to the transducer is electrically isolated from ground but the negative output can also be internally During operation, the voltage and current in the transducer is used to estimate the phase ��.
Page 12: Control Of Vibration Amplitude
To operate at a parallel resonance (impedance maxima), the phase controller gain must be negative to create a stable operating point. In some applications, the electrical capacitance of the transducer can cause the impedance phase angle to be non-zero at resonance, e.g. 45 degrees. In such cases, an impedance frequency response should be performed first, to identify the desired operating phase.
Page 13 Phase Frequency Signal Power Transformer Setpoint Controller Generator Amplifier Transducer Ground Connection Phase and Current Detector Figure 6. Phase and current control loop in the PDUS210 driver. 14.3 Power Control When operating with constant voltage or current, a limit can be set on the maximum power dissipation in the load.
Page 14: Choosing The Voltage Range
Phase Frequency Signal Power Transformer Setpoint Controller Generator Amplifier Transducer Ground Connection Phase and Power Detector Figure 7. Phase and power control loop in the PDUS210 driver. 15 Choosing the Voltage Range ranging from 1.5 Ω to greater than 400 Ω. The optimal choice is determined by the transducer The PDUS210 is available in voltage ranges from 17 Vrms to 282 Vrms, which suit load impedances impedance at resonance, and the choice of series or parallel resonance.
Page 15 �� = �� 1,�� where �� is the maximum driver current. 15.2 Parallel Resonance For operation at the parallel resonance, the most suitable amplifier has an optimal impedance which is close to, or slightly less than the fully loaded impedance. Since transducer impedance tends to reduce with applied power, an amplifier with a lower optimal impedance is recommended.
Page 16: Front Panel
16 Front Panel Indicator Description Standby Indicates that the output is enabled but not active Phase Lock The measured phase is within +/-10 degrees of the phase setpoint Output Output is enabled Power Power is on Temp A thermal overload has occurred, enable the amplifier to restart Load Load power has exceeded the limit, enable the amplifier to restart Amplifier dissipation has exceeded 150W, enable the amplifier to restart...
Page 17 On / Off Tracking Mode: Output state is toggled when pressed. Pulse Mode: Pulse output is enabled, the “Continuous” setting is ignored. Frequency Modulation: Frequency modulation output is enabled. Disabled: Nothing All Modes: Output is disabled. Also unlocks the amplifier, if it has been Shutdown locked for front panel control.
Page 18: Rear Panel
[2] The transducer is connected between HV+ and HV-, which are electrically isolated from ground. The transducer can be grounded remotely, or by connecting either HV+ or HV- to the Ground pin. The TX ID pin is reserved for future use, this is a low-voltage pin aimed at communicating calibration information with external transformers.
Page 19: Overload Protection
18 Overload Protection 18.1 Temperature Overload • Triggered when the heatsink temperature exceeds 60C. • The output will be disabled, and the Temp indicator will light. • An enable command is required to clear the overload. • Troubleshooting: check the fan and heatsink for blockages. 18.2 Load Power Dissipation Overload •...
Page 20: Desktop Software
Go into the folder and launch the executable (piezodrive.exe). Ignore operating system warnings about security, this software does not have a windows security certificate. This will be added in future releases.
Page 21 • Will disable power tracking. • The voltage will not be adjusted until the phase is within 10 degrees of the phase set point. Power Tracking Switch - Enables and disables power tracking. • The output voltage will be adjusted until the measured load power equals the power set point.
Page 22 • The operating frequency range should not exceed the output transformer specifications. Maximum (Hz) - The maximum output frequency, in Hertz. • Limited to values between the minimum frequency and 340 kHz. • The operating frequency range should not exceed the output transformer specifications.
Page 23 19.5 Load Voltage and Current Plots Current (A) – Load current, measured at 3.4 MSPS, 500 samples are displayed. Voltage (V) – Load voltage, measured at 3.4 MSPS, 500 samples are displayed. To scale an axis, hover over the axis and use the mouse wheel •...
Page 24 19.7 Small Graphs Time histories of the amplifier power, load power, temperature, impedance, and RMS current will appear when the software is maximized. Most of these have a fixed scale. 19.8 Status Bar 1 USB Status – Displays the connection status of the USB connection. 2 Device Selector –...
Page 25 20 Frequency Sweep Mode Click the sweep tab to enter the frequency response analysis mode. Set Button – Sets the sweep controls to the following recommended settings: • Voltage = 50% of maximum • Current = 10% of maximum • Frequency step = 100 Hz •...
Page 26 20.1 Frequency Sweep Plot Impedance – The impedance magnitude in Ohms, log scale. Phase- The impedance phase in degrees. To scale an axis, hover over the axis and use the mouse wheel. • Scale the plot by hovering over the plotted signals. To auto-scale an axis, double click the axis.
Page 27 21 PDUS210-FLEX Operation The PDUS210-FLEX is identical to the standard PDUS210 except that it requires an external transformer connected between the amplifier and transducer using the supplied cable. This allows the user to switch between different output voltage ranges by changing the external transformer. The PDUS210-FLEX must be purchased with at least one external transformer.
Page 28 (Introduction to RS485). The PDUS210 responds to the commands described in https://github.com/PiezoDrive/RS485-API For testing purposes or to control the amplifier from a PC, an RS485 USB cable is required, for example, FTDI USB-RS485-WE-1800-BT. The connection diagram below is recommended. A text-...
Page 29 23 Pulse Mode Pulse mode creates a series of short bursts with defined duration and repetition rate (period). The number of pulses and amplitude rate-of-change (slew rate) can also be chosen. Phase, current and power tracking can be used in pulsed mode; however, measurements and control are only preformed once per pulse;...
Page 30 24 Frequency Modulation Mode This mode modulates the frequency around a centre frequency, which is useful in applications such as ultrasonic cleaning. The centre frequency can be fixed or controlled using phase tracking. The output voltage can be fixed or controlled using power or current tracking. Note that tracking controllers only operate when the phase error is less than 10 degrees.
Page 31 25 Multi Device Mode Multi device mode allows multiple PDUS210 units to be controlled and monitored simultaneously. All PDUS210 units need to be unlocked and available for software control (press the shutdown button). Additionally, the phase tracking, current tracking, power tracking, and use remote amplitude settings need to be synced.
Page 32 Contact PiezoDrive if you require assistance selecting a suitable calibration load. Alternatively, a high- power calibration load (PDUS-CAL1) is available from www.PiezoDrive.com. 26.1 PDUS210-FLEX Calibration The PDUS210-FLEX requires recalibration after a change in the output transformer. To improve productivity, the calibration data for different transformers can be saved to a file, then loaded again when that transformer is reconnected.
Page 33 26.2 Calibration Page Calibration on Device - Displays the calibration data loaded on the PDUS210. Turns – Transformer turns ratio when calibrated. PDUS210 Serial – Serial number of the PDUS210 used to perform the calibration. Test Load – Value of calibration resistance. Date/time –...
Page 34: Rack Mounting
Figure 11. Single rack kit, showing the amplifier on left, and the rack adaptor on right. 29 Warranty PiezoDrive amplifiers are guaranteed for 12 months from the date of delivery. The warranty does not cover damage due to misuse. PDUS210 V5 Manual...

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