A plasma pulse power supply
A pulsed power supply and plasma technology, applied in the direction of pulse duration/width modulation, electrical components, adjusting electrical variables, etc., can solve the problems that the current amplitude cannot be continuously adjusted, the discharge speed is limited, and the system design is difficult to achieve the overall The structure is simple and effective, ensuring reliable breakdown, and the effect of meeting the needs of production and application
Active Publication Date: 2021-12-21
SHENZHEN ACAD OF AEROSPACE TECH +1
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Problems solved by technology
[0003] Capacitor charging and discharging is used to realize pulse output, which can realize pulse current with high power, narrow pulse width and fast rising speed, but the current amplitude cannot be continuously adjusted; Width and amplitude are adjustable, but the characteristics of switching devices limit the discharge speed of the system
In addition, the transient operation of various power sources may easily cause the transient power of the pre-stage to be too large, making the system design difficult
Method used
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[0020] The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0021] For pulse-type power supplies, such as plasma arc electric propulsion applications, etc., in such applications, the volume of the power supply is usually high, and the current source and the pulse ignition power supply are required to work together, that is, to cooperate with high-voltage pulse current during continuous current operation. Achieve transient breakdown, so that the plasma load is equivalent to a normal load that can work stably. At the same time, the current source and high-voltage pulse have the characteristics of adjustable time and working sequence, ensuring adjustment according to the load characteristics.
[0022] contrast, such as Figure 1 to Figure 4 As shown, this example provides a plasma pulse power supply, the input voltage V in Converted to intermediate bus voltage V by DC / DC converter m , the ...
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The invention provides a plasma pulse power supply, the input voltage V in Converted to intermediate bus voltage V by DC / DC converter m , the intermediate stage bus voltage V m At the same time as the input of the first pulse current source and the second pulse current source, it is used to generate two pulse current outputs with phase relationship, wherein, in the first pulse current source, the control signal PWMA is converted into DC level signal, and use the DC level signal as the current reference signal to realize closed-loop control; the second pulse current source is a high-voltage pulse current source, and the transient power energy storage is performed through the inductor L, and the pulse width of the control signal PWMB is used to adjust Corresponding to the peak value and energy of the high-voltage pulse current source. The invention realizes two-way pulse power supply, can effectively reduce the capacitance value of the system capacitor, and has a simple and effective overall structure. On this basis, a plurality of delay circuits are also designed to realize internal timing control and have a timing adjustment function.
Description
technical field [0001] The invention relates to a pulse power supply, in particular to a plasma pulse power supply. Background technique [0002] Due to the intermittent power supply mode of pulse power supply, it has been widely used in many fields, such as pulse electroplating, industrial waste gas treatment and pulse electrolysis. In the military and aviation fields, pulse current sources are also used in electromagnetic guns and plasma arc propulsion applications, and usually use capacitor charging and discharging methods, or use DC stabilized voltage sources with pulse switching methods to achieve pulse output. At the same time, For pulsed power supplies, it is often necessary to achieve output according to a specific timing. [0003] Capacitor charging and discharging is used to realize pulse output, which can realize pulse current with high power, narrow pulse width and fast rising speed, but the current amplitude cannot be continuously adjusted; Width and amplitude...
Claims
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IPC IPC(8): H02M9/02H02M3/00H02M1/32H02M3/156H03K7/08H03K19/20
CPCH02M3/00H02M1/32H02M3/156H03K7/08H03K19/20
Inventor 张迪刘贺施凯敏付明朱洪雨
Owner SHENZHEN ACAD OF AEROSPACE TECH