piezofan driver circuit (60khz 110V)?

[SArepairman]

So I have a piezofan that I bought a while back, http://www.steminc.com/PZT/en/piezoelectric-fan-blade-60-khz


I want to make a little driver circuit for it, my thoughts go like this:

LDO (with voltage adjust) (or possibly a boost converter to run it off batteries) > 555 timer making a 60khz 50% duty cycle square wave (w/ fine frequency tune) > NMOS transistor > ATX power supply transformer > Piezofan (at 110V)


I never used a piezoelectric device before, I would like to make sure this is typically how a driver for them works.


How is it typically done without magnetics though... like line powered?

and any idea on what the power draw of these types of fans might be?

[DTJ]

I know SFA about piezo fans, but perhaps this link may assist:

http://www.piezo.com/prodfan3lv02.html

[SArepairman]

BUmp. Btw, it IS 60KHz, they have a typo on their website. They also sell a 60 Hz version, but I got the 60KHz version.

60KHz 110V. The two ideas that I have are

1)

a) Use a power op amp (LT1010 20MHz unity gain buffer (used to buffer wein bridge), OPA550/551 audio op-amp, used to form wein bridge) in order to generate a medium level 60KHz signal.

LT1010 = 44 Vpp
OPA551 = 60 Vpp

b) Connect single ended output to a step up transformer and tune gain of wein bridge circuit so the output is 60KHz @ 110Vrms as stated in the data sheet.

c) connect piezofan directly to transformer taps

2) Tuned circuit?

I measured the piezofan circuit (the piezo element +10k series resistor is all there is on the PCB) in a LCR meter (DE 5000) and I got the following parameters @ 100KHz

Lseries = 5.62uH
Cseries = 4.68 nF
D = 26.1
Q = 0.034
ESR = 9.82 kohm
Phase shift = -2 degrees
Cparallel = 5.63 nF
Rprallel = 9.839 kOhm
Rs = 9.82 kOhm

Can I use an adjustable inductor in order to tune the circuit to oscillate at 60Khz and generate the appropriate gain?