Three, working principle
When variable frequency power amplifier supply moving coil current, according to the law of electromagnetic induction, available:
F = 0.102 BLI x 10 (1)
Fmax BLImax = 0.102 x 10 (2)
Type:
Fmax for exciting force F the large amplitude (Newton), known as the biggest vibration force
B average in the air gap magnetic induction intensity for work (tesla)
I to supply power amplifier with current instantaneous value (amp)
Imax for current (I) of the large amplitude (amp)
L for cutting lines of effective length of the wire coil (m)
(1), (2) can be obtained
Alpha = F/I = Fmax/Imax BL = 0.102 x 10 (3)
For each type of vibrator, B, L are constant, so the alpha is the fixed value. Often referred to as the force constant vibrator.
