Fig. 1. Structural diagram of absorption sphere shutdown system

Fig. 2. Working principal diagram of stepper motor driver

Fig. 3. Voltage waveform at step motor side(a) 50 m connecting cable between the driver and the stepper motor, (b) 2.5 m connecting cable between the driver and the stepper motor

Fig. 4. Schematic diagram of the propagation route of the interference source

Fig. 5. Principal diagram of interference caused by DC power supply

Fig. 6. Principal diagram of introducing interference induced by cable shielding layer

Fig. 7. Principal diagram of the effect of the disturbance on the control circuit

Fig. 8. Photo of oscilloscope waveform of measured signal (a) No interference, (b) Overlay significant interference

Fig. 9. Principal diagram of low level phase interference circuit

Fig. 10. Principal diagram of upstream filter

Fig. 11. Schematic diagram of downstream filter

Fig. 12. Renderings without DT-DV reactors

Fig. 13. Renderings with DT-DV reactance filter