Power supply characteristics of constant current high voltage DC power supply
Constant current high-voltage direct current power supply, abbreviated as "constant current source", is actually a type of "current source"
The output current of the power supply is independent of the size of the load, and its main control variable is "current". This power supply is applied to electrostatic precipitators and has many advantages compared to "voltage sources". Firstly, the power supply characteristics of this power supply on electrostatic precipitators work in a "positive feedback" manner, that is, the output power of the power supply is directly proportional to the required power of the precipitator; If the dust concentration of the dust collector increases at a certain moment, in order to maintain the dust removal efficiency of the dust collector, the high-voltage power supply that supplies power to the dust collector needs to synchronously increase the output power at that moment; Because the output current of the constant current source is constant, and the output voltage varies with the size of the load, when the dust concentration increases, the output voltage of the constant current power source also increases synchronously, which is reflected in the synchronous increase of the power output power on the dust collector. And precisely because the constant current power supply is a positive feedback operation for the dust collector, it has strong adaptability to working conditions, stable operation, and can maintain high sedimentation efficiency for a long time. The second is that the output waveform of the power supply is distortion free (the power supply mainly uses L-C circuit to achieve the transformation from voltage source to current source), which can improve the operating voltage and current level of the dust collector and enhance its working efficiency; Due to the fixed mechanical characteristics of the dust collector (such as pole spacing, pole line form, pole plate form, etc.) after installation, the breakdown voltage (peak voltage) of the dust collector is also fixed regardless of the power source used. At the same peak voltage, a power source with undistorted output waveform will definitely have a higher operating voltage (average voltage) compared to a power source with distorted waveform. The third reason is that the power supply, as a current source, can withstand transient and steady-state short-circuit situations; And it adopts a modular parallel structure, which has higher reliability, simple operation, and convenient maintenance.
