PDUS210 - 210 Watt Ultrasonic Driver
The PDUS210 is a complete solution for driving precision and high-power ultrasonic actuators. The amplifier includes high-speed resonance tracking of a series or parallel resonance modes, vibration amplitude control, and analysis functions such as impedance and frequency response measurement. The PDUS210 is well suited to both OEM product integration and laboratory use for research and development. Applications include ultrasonic drilling and cutting, medical devices, dental devices, ultrasonic testing, liquid cavitation, and vaporization.
The PDUS210 is controlled via USB and the included software package. An RS485 interface also provides a straight-forward method to control and monitor the amplifier for automatic test and OEM applications.
The PDUS210 generates a pure sine-wave output which avoids the excitation of secondary resonance modes by the drive harmonics. This makes it ideal for operating at the electrical parallel resonance, or “anti-resonance”. This operating point is close to the mechanical resonance frequency but is less sensitive to changes in load dissipation, which is useful in precision machining applications where constant vibration amplitude is desired.
The PDUS210 is available with standard output voltage ranges from 17 Vrms to 282 Vrms, and current ranges from 0.7 Arms to 11 Arms. These ranges are optimized for load impedances ranging from 1.5 Ohms to above 400 Ohms at resonance. For research and development applications, a reconfigurable version is available (PDUS210-FLEX), this version uses external output matching transformers to allow operation at any of the available output voltage ranges.
Ultrasonic Drive Methods
For an introduction to driving ultrasonic transducers, refer to Introduction to Ultrasonic Drivers
|Output Voltage||0 - 800 Vp-p||See standard voltage ranges|
|Output Current Max||0 - 32 Ap-p||See standard voltage ranges|
|Optimal Load Impedance||1 Ohm - 5 kOhm||See standard voltage ranges|
|Output Waveform||Sine wave|
|DC Output Voltage||Zero||DC Offset Possible|
|Output Isolation||Isolated||Grounded also possible|
|Max Output Power||210 W||With optimal load impedance|
|Internal Power Dissapation||130 W||Maximum|
|Frequency||See table below||6 kHz to 500 kHz possible|
|Power Supply||48 V, 280 Watt|
|Controller||Phase tracking, current control, power control||2 ms frequency update rate Resonance or anti-resonance|
|Digital IO||4 DIO||
For manual control
Standard Output Voltage Range
The following table lists the specifications of each model variant, including: the maximum output voltage, the maximum output current, optimal load impedance and the recommended frequency range.
Note: The output voltage resolution and tolerance is 8 bits, or 256 levels. Therefore, the smallest possible change in voltage is full-scale range / 256. The minimum output voltage is also limited by resolution. When the amplifier is enabled and the output voltage is set to zero volts, the actual output voltage may be up to 1% of the full-scale range.
*The load impedance range is the range of impedances which guarantee more than 100W of power supplied to the load. Higher or lower impedances can be driven but with reduced power. The relationship between maximum achievable power and the load impedance is plotted in the following figure. In this plot, the impedance is normalized by the optimal impedance; that is,
For example, the optimal impedance of the PDUS210-400 is 100 Ohms, so with a 50 Ohm load, the normalized impedance is 0.5, From the plot, it can be observed that greater than 100 W can be achieved with a normalized impedance from 0.65 to 2.1, which for the PDUS210-400, is 65 Ohms to 210 Ohms.
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.
|Minimum Power||Z Low||Z High|
|150 W||0.71 x Zopt||1.4 x Zopt|
|100 W||0.65 x Zopt||2.1 x Zopt|
|50 W||0.53 x Zopt||4.2 x Zopt|
|Enclosure Dimensions||227 x 168 x 54 mm (L x W x H)|
|Temperature Range||0C - 50C|
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. Please refer to the section PDUS210-FLEX Operation for instructions.
The PDUS210-FLEX must be purchased with at least one external transformer. The available part numbers and specifications are:
|Order Code||Turns Ratio||Volt pk-pk||Volt RMS||AMPS pk-pk||Amps RMS||Optimal Load Ohms||Load Range Ohms*||Freq kHz|
A kit containing six transformers ranging from 17Vrms to 282Vrms is also available (TX210-Kit1). This includes the following output voltage ranges: 17, 35, 70, 141, 212, and 282 Vrms.
|Input Connector||Plug-in screw Terminal||Connectin cable supplied|
|Output Connectors||Identical to PDUS210||See "Front Panel" Section|
|Transformer Dimensions||104 x 57 x 51 mm||L x W x H|
The desktop application controls the amplifier and plots the key signals and operating conditions, which can be logged and exported as CSV files. The desktop application also includes advanced analysis functions such as impedance frequency response analysis, and a setup assistant to help new users analyze and choose operating conditions. Please refer to the manual for a full description.
Standard Delivery Contents
- PDUS210 Amplifier (in chosen configuration)
- Handheld controller
- Handheld controller cable (DSUB9 3ft)
- 280W Desktop power supply
- IEC Power cable suited to the destination shipping address
- USB Cable (Type A)
- 3 Way plug-in screw terminals for output (Amphenol TJ0331530000G)
- 4 Way plug-in screw terminal for RS-485 connector (Amphenol TJ0431530000G)
Warranty and Service
The PDUS210 is guaranteed against manufacturing defects for 12 months from the date of purchase. Contact Micromechatronics, Inc for service. Please include the amplifier serial number.