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Pi Type Ferrite Magnetostrictive Vibrators

Pi Type Ferrite Magnetostrictive Vibrators
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Pi Type Ferrite Magnetostrictive Vibrators - 4

Fig.5 Cleaner tank volume and oscillator output > 123 Cleaner tank volume( ) 1 100100050010550 Oscillator output(W)205010010005005000 Fig.6 Examples of loads(a) Heavy load(b) Light load (deep liquid)(c) Light load (shallow liquid) > VibratorRadiating surface area (cm > 2 )Maximum allowable input power with water loadMaximum allowable amplitudeMaximum allowable stress(kg/cm m)p-p20kHz > 2 )Light loads (W)Heavy loads (W)( Տ type134080715028kHz type82550540kHz type82550450kHz type82550375kHz type3.510202100kHz type2.15121.5 Fig.7 Node position of > 2 -shaped vibrator > C Node

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Pi Type Ferrite Magnetostrictive Vibrators - 6

(6/9) 002-02 / 20080108 / e171.fm (9) Impedance MatchingThe vibrators will not vibrate if their impedance is not matched.If they are not matched, the vibrators Q - which constitute loads in an output matching circuitҒs design - would be high, preventing the impedance to vary significantly near the resonant frequency and cause the Q to be different from the resistance load because the vibrator has the impedance.Such problems can be resolved by adjusting the vibrators impedance using coils and matching it with the oscillatorҒs output impedance.The following table shows actual examples. Actual...

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Pi Type Ferrite Magnetostrictive Vibrators - 8

(8/9) 002-02 / 20080108 / e171.fm Another method is to secure the magnet onto bakelite or nonmag-netic metal using epoxy adhesive as shown in Fig.19. Rubber-based adhesives are not suited for this purpose. Another point to remember is that a plate must be inserted on the upper side (as shown in broken lines in the figures) in situations where mechanical strength is required. When doing so, a gap must be created or a sponge must be inserted so that the plate does not directly contact the vibrator. > Fig.19 Securing the magnet using an epoxy adhesive NNSNNGap or spongeSecure magnet on...

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