Measuring device for the low-frequency oscillation of the discharge current of the Hall electric thruster in the state of orbital operation
A technology of electric thruster and operating state, which is applied to measurement devices, measurement of electrical variables, measurement of current/voltage, etc., can solve problems such as the inability to easily obtain low-frequency oscillating waveforms
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specific Embodiment approach 1
[0014] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the measurement device for the low-frequency oscillation of the discharge current of the Hall electric thruster in the on-rail operating state described in this embodiment, the Hall electric thruster includes a DC power supply 1, and the Hall electric thruster in the on-rail operating state The measuring device for low-frequency oscillation of the thruster discharge current includes a transformer 2, a high-frequency filter resistor R1, a high-frequency filter capacitor C1, a rectifier diode D1, a current limiting resistor R2, a filter capacitor C2, a discharge resistor R3 and an on-board remote sensing measurement device 3;
[0015] The negative pole of the DC power supply 1 is connected to the cathode of the Hall electric thruster;
[0016] The positive pole of the DC power supply 1 is connected to the same-named end of the primary coil L1 of the transformer 2, and the differ...
specific Embodiment approach 2
[0026] Specific Embodiment 2: The working principle will be described below in conjunction with a specific embodiment.
[0027] An additional coil is wound on the inductance L1=0.1mH to form a transformer 2; the discharge current oscillation amplitude is sampled by means of electromagnetic induction, and the turns ratio n of the primary and secondary coils is 1:1.4. Then connect high-frequency filter resistor R1=100Ω and high-frequency filter capacitor C1=33nF in parallel to filter the high-frequency signal to obtain a low-frequency oscillation signal. The -3dB frequency potential of the filter circuit composed of R1 and C1 is 48KHz. After sampling the low-frequency oscillation signal, the rectifier diode D1 is connected in series in the circuit for rectification. The rectifier diode D1 has a forward voltage drop, so if it works in the nonlinear region, it will bring a nonlinear quantity to the signal and affect the measurement results, so this part uses the detection characte...
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