CN201004730Y

CN201004730Y - DC constant voltage and current power supply for high voltage gas laser discharge device

Info

Publication number: CN201004730Y
Application number: CNU200720034601XU
Authority: CN
Inventors: 夏建中; 袁书国
Original assignee: YANGZHOU SHUANGHONG ELECTRONICS CO Ltd
Current assignee: YANGZHOU SHUANGHONG ELECTRONICS CO Ltd
Priority date: 2007-02-09
Filing date: 2007-02-09
Publication date: 2008-01-09
Anticipated expiration: 2017-02-09

Abstract

The utility model relates to a direct current constant voltage and constant current power source which is for the use of high voltage gas laser discharge device in particular and pertains to direct current constant voltage and constant current power source device technical field. The utility model is an improvement on existing high voltage direct current constant voltage and constant current power source structure. A three phase voltage component and a control circuit are connected between the input protection component of the primary phases of high voltage transformer and the voltage control ring. When the load is arced which leads the output current surpass the rating current, the control circuit will immediately send out a trigger pulse and conduct the controllable silicon in the sever three phase current component and make the voltage on the primary coil group of the high voltage transformer reduce to zero so as to make the secondary voltage of the high voltage transformer reduce to zero. Thus, the output direct high voltage and the output current is reduced to zero immediately and the arc on the arc laser tube of the high voltage gas laser discharge device is goes out immediately to restore to normal property. The utility model has the advantages of simple circuit, excellent control effect and is beneficiary for the high voltage gas laser discharge device.

Description

DC voltage and current constant power special for high-voltage gas laser discharge device

Technical field

The utility model relates to a kind of DC voltage and current constant power special for high-voltage gas laser discharge device, belongs to dc constant voltage constant-current supply equipment technical field.

Background technology

Under the normal condition, for the gases at high pressure laser discharge device provides the power-supply device of constant pressure and flow, load request power supply output 30KV high pressure, output current 3A.The gas laser pipe unit sends powerful energy, usefulness for later process processing, but this gas laser electric discharge device is not too stable, it under normal condition a kind of laser beam stably, but when the purity of gas etc. can not the survey factor takes place, phenomenons such as arcing will take place in laser beam stably, and in case just injury discharge device very easily of arcing takes place.Therefore, in case load generation arc light and when making output current surpass 3A suddenly, power supply should be able to can not damage with the protective gas laser aid rapidly at 1ms internal cutting off output high pressure; Simultaneously on the other hand; because this safeguard measure might take place in the clock time more than ten time in one minute; if laser discharge device frequently repeatedly quits work; will reduce the energy of gas laser apparatus; make it reduce operating efficiency, arc light takes place and make the out-of-work time of power supply should not surpass 10ms therefore at every turn.

The utility model content

The purpose of this utility model is can't cut off the output high pressure when the phenomenons such as gases at high pressure laser discharge device generation arcing rapidly at existing high voltage direct current constant voltage constant current power, thereby very easily damage gas laser apparatus, can't resume work rapidly again simultaneously, can reduce the deficiency of the energy of gas laser apparatus, be provided at and keep having on the technical performance basis of high-voltage large current, both can cut off output high pressure, a kind of DC voltage and current constant power special for high-voltage gas laser discharge device that can resume work rapidly again rapidly at short notice.

The purpose of this utility model is achieved through the following technical solutions; a kind of DC voltage and current constant power special for high-voltage gas laser discharge device; comprise the high-tension transformer in the major loop; high-tension transformer is elementary respectively be connected by air switch; the three-phase input protection parts that contactor and fuse are formed; the three-phase voltage controlling unit of forming by controllable silicon; the high-voltage rectifying bridge of the secondary connection of high-tension transformer and electric current and voltage sample circuit; it is characterized in that inserting in the loop before elementary each phase three-phase voltage controlling unit of high-tension transformer of described power source special and cut off the three-phase voltage parts; the signal output of the control circuit that is provided with connects respectively cuts off each the phase silicon controlled control utmost point and negative electrode in the three-phase voltage parts, the current sampling end in the input termination power major loop of control circuit.

Respectively cut off the three-phase voltage parts mutually and be made up of the controllable silicon of reactor and forward and reverse connection, reactor is serially connected in the connecting line of corresponding phase fuse and primary coil, before the forward and reverse tie point of two silicon controlleds inserts the controllable silicon of three-phase voltage controlling unit.

The utility model is the improvement to existing high voltage direct current constant voltage constant current power structure; by in the input protection parts of elementary each phase of high-tension transformer and the circuit between the voltage control link, inserting the cut-out three-phase voltage parts of forming by reactor and controllable silicon; when load generation arcing makes output current surpass rated current; control circuit is sent out a trigger impulse immediately; make the controllable silicon conducting of cutting off in the three-phase voltage parts immediately rapidly; three-phase main-frequency voltage is added on the reactor immediately; feasible pressure drop by the controllable silicon series loop in primary phase winding and the voltage control link is reduced to the pressure drop of controllable silicon conduct positive rapidly; the silicon controlled forward voltage drop equates in three-phase voltage parts controllable silicon and the voltage control link owing to cut off; voltage on the elementary winding of high-tension transformer just reduces to zero immediately so; the high-tension transformer secondary voltage reduces to zero immediately; and then make output high direct voltage and output current reduce to zero immediately; arcing on the Gas LASER Tube is extinguished immediately; recover normal performance; the utility model circuit is simple; control effectively, help the gases at high pressure laser discharge device.

Description of drawings

Fig. 1 is the utility model and gases at high pressure laser discharge device connecting circuit figure.

Embodiment

Further specify the utility model in conjunction with the accompanying drawings and embodiments, the utility model is by control circuit, high-tension transformer, high-tension transformer is elementary respectively be connected by air switch, the three-phase input protection parts that contactor and fuse are formed, the three-phase voltage controlling unit of forming by controllable silicon, cut off the three-phase voltage parts, the high-voltage rectifying bridge of the secondary connection of high-tension transformer and electric current and voltage sample circuit constitute, each cuts off the three-phase voltage parts mutually and is made up of the controllable silicon of reactor and forward and reverse connection, reactor is serially connected in the connecting line of corresponding phase fuse and primary coil, before the forward and reverse tie point of two silicon controlleds inserts the controllable silicon of three-phase voltage controlling unit; The signal output of control circuit connects respectively cuts off each phase silicon controlled control utmost point in the three-phase voltage parts,

Three-phase input protection parts; form by air switch KK, contactor 3J1 and fuse; major function is with in the three-phase main-frequency voltage introducing machine; fuse and sky open overload protective function; contactor 3J1 just often works to cut off or connect three phase mains; when power failure, the effect of protection power supply and load is played in the 3J1 tripping.

Fast shut-off three-phase voltage parts, form by reactor DK1～DK3 and controllable silicon SCR 7, SCR8 and SCR9, SCR10 and SCR11, SCR12, SCR7～SCR12 does not work when the power supply operate as normal, have only when load generation arcing makes output current surpass 3A, control circuit is sent out a trigger impulse immediately, make SCR7～SCR12 conducting immediately rapidly, three-phase main-frequency voltage just is added on reactor DK1～DK3 immediately like this.With A is example mutually, because the conducting immediately of SCR7, SCR8, makes that the pressure drop news speed by primary A phase winding and SCR1, SCR2 series loop is reduced to the conduct positive pressure drop of SCR1, SCR2.Because the forward voltage drop of SCR7, SCR8 and SCR1, SCR2 equates that the voltage on the elementary A phase winding of high-tension transformer just reduces to zero immediately so.Voltage on same elementary B phase winding of high-tension transformer and the C phase winding also reduces to zero immediately.Cause that thus the high-tension transformer secondary voltage reduces to zero immediately, and then make output high direct voltage and output current reduce to zero immediately, the arcing on the Gas LASER Tube is extinguished immediately, recover normal performance.Because control circuit only sends individual pulse to SCR7～SCR12 when receiving over-current signal; therefore after three phase worker power generation commutation; be that three-phase voltage is when passing through zero crossing respectively; controllable silicon SCR 7～SCR12 just turn-offs in succession; electric power output voltage is still again by SCR1～SCR6 control; enter normal operating conditions, be made as 5～10ms recovery time, power supply is finished an arcing protection process.

The three-phase voltage controlling unit is made of controllable silicon SCR 1～SCR6, send the trigger impulse of out of phase to SCR1～SCR7 by control circuit, to change SCR1～SCR7 angle of flow, and then the voltage on the change three-phase high-voltage transformer input coil, and then the secondary voltage of change high-tension transformer, the final effect that changes output high direct voltage and output current.

Claims

1; a kind of DC voltage and current constant power special for high-voltage gas laser discharge device; comprise the high-tension transformer in the major loop; high-tension transformer is elementary respectively be connected by air switch; the three-phase input protection parts that contactor and fuse are formed; the three-phase voltage controlling unit of forming by controllable silicon; the high-voltage rectifying bridge of the secondary connection of high-tension transformer and electric current and voltage sample circuit; it is characterized in that inserting in the loop before elementary each phase three-phase voltage controlling unit of high-tension transformer of described power source special and cut off the three-phase voltage parts; the signal output of the control circuit that is provided with connects respectively cuts off each the phase silicon controlled control utmost point and negative electrode in the three-phase voltage parts, the current sampling end in the input termination power major loop of control circuit.

2, DC voltage and current constant power special for high-voltage gas laser discharge device according to claim 1, it is characterized in that described each cut off the three-phase voltage parts mutually and form by the controllable silicon of reactor and forward and reverse connection, reactor is serially connected in the connecting line of corresponding phase fuse and primary coil, before the forward and reverse tie point of two silicon controlleds inserts the controllable silicon of three-phase voltage controlling unit.

3, DC voltage and current constant power special for high-voltage gas laser discharge device according to claim 1 is characterized in that described control circuit by accessory power supply, the overcurrent comparator, and pulse-generating circuit and burst transmissions circuit constitute; The output of overcurrent comparator connects the input of pulse-generating circuit, the elementary winding of transformer in the output termination burst transmissions circuit of pulse-generating circuit, 6 of transformer groups of secondary winding connect respectively and cut off each the phase silicon controlled control utmost point and negative electrode in the three-phase voltage parts in the burst transmissions circuit, and the current sampling signal in the power supply major loop is taken over the input of stream comparator.

4, according to claim 1 or 3 described DC voltage and current constant power special for high-voltage gas laser discharge device, it is characterized in that the overcurrent comparator is made of operational amplifier and peripheral circuit in the described control circuit.

5,, it is characterized in that pulse-generating circuit is made of the electric capacity that is connected in series, resistance and the common diode that is connected with transistor base in the described control circuit according to claim 1 or 3 described DC voltage and current constant power special for high-voltage gas laser discharge device

6,, it is characterized in that burst transmissions circuit in the described control circuit is made of the steering diode, current-limiting resistance and the anti-interference capacitor that are connected in series on one group of elementary winding in the pulse transformer and six groups of secondary winding and each secondary winding according to claim 1 or 3 described DC voltage and current constant power special for high-voltage gas laser discharge device.