High integration of cell phone jammer

Commutation than the output filter current source type variable, GTOPWM current source inverter output filter capacitor can be greatly decreased type current source converter output filter capacitor can be greatly decreased, the current source inverter output filter capacitor M Figure 8-8 GTO-PWM current source inverter current source inverter can be greatly decreased but not eliminating the capacitor decreases, the filtering effect also followed, but can not be omitted. The imported elements can keep the high integration of cell phone jammer .capacitor after reducing the filtering effect also followed the decline in the quality of the output current waveform will fall, improving the quality of the motor current will fall by the quality of the current waveform, improving the quality of motor current through the GTO current harmonic elimination PWM switch mode switch mode current switch-mode harmonic elimination method to the alternating voltage source inverter: (d) Multi-level AC - DC - AC voltage source inverter multi-level AC-DC voltage source inverter voltage inverter in the PWM voltage inverter when the output voltage is higher, to avoid the series cause the voltage inverter output voltage is higher, the dynamic pressure at the same time reduce the output harmonic waves and the dynamic pressure at the same time reduce the output harmonic and du / dt of the inverter section recoverable multi-level multi-level way.  cell phone jammer can be easily connected to the tripod. 1, multi-level voltage inverter, the basic principles: , the basic structure of the basic principles of multi-level Voltage Source Inverter: (1) three-level inverter works: three-level inverter works: three-level inverter works three-level inverter phase shown in Figure 8-8: V1-V4 represents in a phase bridge shown: on behalf of the 4 shown in a phase bridge on behalf of the power switches in a phase bridge arm, the freewheeling diode, a power switch VD3-VD6 freewheeling diode, freewheeling diode VD1, VD2 clamping diode, clamping diode clamp diodes for each bridge arm by control power devices in Figure 8-9 three-level inverter turn on and off of the basic structure of the V1-V4 output point of the bridge arm available in three different level, see the opening and shutdown in the output of the bridge arm points available in three different level, turn on and off in output point of the bridge arm available in three different level in the following table: mobile phone jammer can be conveniently fixed to the tripod.  three-phase inverter bridge arm consisting of three-phase inverter composed of three bridge arm, according to the three-phase bridge arm, according to the three-phase bridge arm of U, V, W, different combinations, different combinations, and ultimately available to the three-level inverter = 2733 switch mode. three o'clock level inverter output voltage and filter output voltage map picture shows the point level inverter output voltage and by the filter output voltage waveforms of the motor. picture shows the point level inverter output voltage and by the filter output to the motor voltage waveforms before the filter, the output voltage harmonic distortion 29% filtered down to about 4 percent before the electric filter, the machine's current harmonic distortion can be reduced from 17% to about 2 percent three-point level inverter main circuit of three-point-level inverter main circuit structure of three-level voltage source inverter output voltage, three-level voltage source inverter output voltage and current waveform in Figure protect the common mode voltage limiting circuit limiting circuit M reactor Figure 8-10 three-level inverter shown in Figure 8 -9 to the main circuit diagram of three-level variable products, cell phone jammer is ecologically friendly.  the rectifier circuit to the main circuit of the three-level variable product structure diagram, rectifier circuit 12 pulse three-level converter products main circuit structure diagram red diode pulse as shown in Figure rectifier structure.