Machine speed is about 4 mm * us - 1, as a result, the deformation in a few microseconds only is complete (depending on the length of the PZT element). It is unlikely to appear in an instant, whenever, as long as the discharge and wear, acoustic shock waves from the PZT element face into. So, PZT element compressive strain can not increase further increase stress situation. We and Wm K33 coupling coefficient to find the available: In the formula, B is the volume of PZT elements. Wy can use SD33 smooth coefficient and mechanical stress F3 to said: (3) Which We into electricity for the ignition Wm for mechanical energy, belongs to the mechanical wear and tear. To mechanical source of energy for Wf, all added to the PZT cylinder on the upper, if PZT cylinders remain open, and no loss, if the load on the street when a part of the energy W. In addition to the voltage level, the energy dissipations of the spark for the ignition of the gas is an important factor.
#Piezo igniter element how to
If in a long L piezoelectric ceramics (PZT) on both ends with an axial stress F3, in the condition of open circuit (D = 0), V3 voltage between electrodes are given in the type:įor a given PZT igniter, d33, c 33, g33, L is a constant value, how to output voltage v3 is a function of stress F3, as shown in figure 1.įigure 1 several materials plant for the function of the static stress intensity Using piezoelectric ceramic igniter, can make the ignition system has smaller volume, and work in high temperature, damp environment, and therefore is widely applied in gas stove, oven, kitchen equipment and desktop igniter and lighter.Ģ, the voltage of the piezoelectric igniterĢ.1.1 the performance of the open circuit condition Pressure point ceramic ignition system is not so complicated, only one or two electrical part of the cylindrical piezoelectric ceramic materials, ignition need the breakdown voltage of a piezoelectric ceramic under a mechanical stress.
The downside is the ignition system is relatively complicated, in the kitchen with larger temperature and humidity environment, easy to fail. In recent years, has developed many kinds of ignition, these systems are based on a battery or a permanent magnets as a power source for work, most of them need transformer, in some cases also need capacitor. Received a certain stress of the piezoelectric ceramic transducer can produce enough voltage between the electrodes cause sparks, such a spark can be used in the ignition of flammable, the device is called piezoelectric ceramic igniter.
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