PiezoMaster Products

Standard Models Various standard selections are available to match the PiezoMaster with system requirements. Selection of the best product for a particular application is easily accomplished with the following guidelines. The input power is either 48VDC or 24VDC. This can be regulated, loosely regulated or unregulated DC power. For best noise performance, the amplifier power input should be isolated from the system power. If there is no existing system power supply available, then 48VDC power is slightly more efficient and is therefore the better choice. The voltage range selection is dictated by the maximum piezoelectric stack voltage limit. In order to obtain the highest performance from the stack, the amplifier should drive the stack to its highest voltage without exceeding its limit. For this reason, the range is selected to match the maximum allowable stack voltage. The bias voltage is that output voltage that is across the stack with 0VDC input. In order to maintain the stack at or near its midpoint of travel, the bias voltage is usually selected to be one half of the range voltage. Finally, the gain is selected to match the available input signal operating voltage range. The gain is defined as the change in output voltage divided by the change in input signal voltage. As an example, selecting model VP7206-48H805, the range is 800V, the bias is 400V and the gain is 200. For this model an input signal change from 0V to +2V will cause the output voltage to change from +400V to +800V.

MODEL POWER RANGE BIAS GAIN VP7206-48H805 48V 800V 400V 200 VP7206-48M605 48V 600V 300V 100 VP7206-48M405 48V 400V 200V 100 VP7206-48L205 48V 200V 100V 50 VP7206-48L105 48V 100V 50V 50 VP7206-24H805 24V 800V 400V 200 VP7206-24M605 24V 600V 300V 100 VP7206-24M405 24V 400V 200V 100 VP7206-24L205 24V 200V 100V 50 VP7206-24L105 24V 100V 50V 50

 

 

        

Tailored Models If any application requires a selection of range, bias or gain not available with standard models, then any of these parameters may be independently tailored as required. The range can be any voltage from zero volts to 800V. The bias can be any voltage from zero volts to 800V and must be lower or equal to the range. The gain can be any value between 5 and 450; however, the maximum signal input voltage of ±15VDC must be considered. With this flexibility, any input signal range including positive or negative unipolar ranges can be matched for optimum performance with any stack voltage up to 800V. As an example, if the required range is 800V, the bias is zero volts and the gain is 100, then a unipolar input signal change from zero volts to +8V will result in an output stack voltage change from zero volts to +800V. In this case, a signal input voltage of +4V will maintain the stack at the midpoint of its displacement.     Model Number Assignment To define a model number for a specific tailored unit, change the suffix as follows:   Model   Suffix       The first two numbers of the suffix specify the input power-either 48VDC or 24VDC. The third letter specifies the gain of the amplifier according to the code list below:     Gain Code List GAIN CODE         GAIN CODE         GAIN CODE 5 A         50 L         160 T 7 B         60 K         180 U 10 C         70 N         200 H 15 D         80 P         250 V 20 E         90 Q         300 W 25 F         100 M         350 X 30 G         120 R         400 Y 40 J         140 S         450 Z     The fourth and fifth numbers specify the range in tens of volts. For example, an 800V range is indicated by "80" and 150V range is indicated by "15". The sixth number specifies the bias as a percentage of the range. In other words, "1" is 10% of the range and "5" is 50% of the range. If the range needs to be specified more precisely, then a seventh number "15" would specify a bias that is 15% of the range. Zero bias and 100% bias are both available. For zero percentage bias, the sixth number is "0". For 100% bias use "00" as the sixth and seventh numbers.       Custom Models Some applications require features beyond the scope of standard and tailored models. These custom models are routinely developed at Viking Industrial Products to fulfill almost any set of requirements. Some possible custom features are: HIGHER OUTPUT POWER HIGHER OUTPUT VOLTAGE MULTIPLE OUTPUTS   VARIOUS DC POWER INPUTS DIFFERENT SIZE or SHAPE BRIDGE CONFIGURED DUAL OUTPUTS   We welcome all inquiries for custom products.