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The two parts of this circuit's charge and discharge circuit, several kV to a dozen kV transformer T2 boost the voltage up to AC by the regulator channel T1 regulator, charging the energy storage capacitor C rectified. When the trigger S turns, the charge of the capacitor to the instantaneous discharge of the shock wave source device W generated shock wave, to achieve good shock wave, the discharge time is requested within 1us. The generated wave of energy depends on the energy stored in the capacitor, the energy formula for E: 1/2CU2, wherein an energy, E, the unit joules (J); C-capacitance in farad (F); U-a charging voltage, in volts (V). Such as a crusher capacitor 0.5uF, voltage 10kV, the energy of E: 1/2X (0.5X10 ^ -6) X (10X10 ^ 3) = 25J, if the discharge time t as 2uS, according to the discharge current equation I = Cu / T regarded instantaneous discharge current is I = (0.5x10 ^ -6) X (10X10 ^ 3) ÷ (2x10 ^ -6) = 2500A. From the above analysis, the energy of the shock wave depends on the value of the charging voltage U and the capacitor C, crusher capacitance C between 0.3-1.0uF little change, but the energy and voltage U is proportional to the square of energy depends mainly on the high-pressure, the higher the voltage, the greater the energy, the focus at the shock wave pressure, stones more easily crushed. Much energy is easy to cause injury to the patient and therefore the crusher to lower energy efficient, low side effects direction.
