The slow-start design can solve the problem of sparking for cell phone jammer

device commutation type, load change-phase GTO-PWM type. type a series of diode current source inverter series diode current source inverter connected in series diode current source inverter inverter circuit output filter commutation current source inverter output filter commutation current source inverter: commutation current source inverter output filter M pattern 8-7 output filter to change the phase current source inverter output filter to change the phase current source inverter output filter to change the phase current source inverter output filter into the SCR into the output filter change phase current source inverter output filter line commutation. filter capacitor start and low speed will not achieve the basic change relative to the role of the line to change the start and low speed, filter capacitor will not achieve the basic commutation effect is generally taken at the start and low-speed filter capacitor will not achieve the basic change with the role, in general, discontinuous current commutation. The appearance of sparking should be avoided forcell phone jammer .Whenever the inverter side want to change, try to make input to the inverter current intermittent commutation method when the inverter side SCR want to change when trying to input to the inverter to shed whenever the inverter side want to change the direct current drops to zero, so that the inverter side to the all the SCR temporary shutdown, and then control the DC shed drops to zero, inverter side, all the temporary shutdown, temporarily shut off to the commutation should be guided through the SCR plus the trigger pulse DC power supply is restored, together with the trigger pulse. conduction should resume the DC power to the commutation coupled with SCR trigger pulse current will trigger the order flows through the new conduction in order to achieve from one phase to another, the current will trigger new turn-on order flows through a phase converter intermediate circuit is used off flow, a phase converter. The slow-start design can solve the problem of sparking for cell phone jammer .Figure 8-6, the intermediate circuit is used for drying, for drying the intermediate circuit is the blocking time number one hundred microseconds. Another way to blockade of power, one hundred microseconds Another way to block the power supply side rectifier to the inverter state, the DC link current, the rapid decay of the purpose to achieve short-term drying. DC link current, the rapid decay has reached a short-term drying purposes. GTO - PWM current source inverter current source inverter: inverter current source GTO-PWM current source inverter with current source inverter with GTO power current source inverter part inverter power devices as inverter part, as shown in not needed for the forced shutdown of the commutation circuit, the rate of the device, as shown in Figure 8-7, the GTO does not need to be used to force the turn-off commutation circuit, do not qualify for for the forced shutdown of the commutation circuit rated voltage for AC 6000V inverter, three inverter side can be used every arm of the inverter, the rated voltage AC inverter 6000V GTO series as a switch,