Page 1: ...HV1000 PULSER OPERATION MANUAL SERIAL NUMBER DATE Directed Energy Inc 2301 Research Blvd Ste 105 Fort Collins Colorado 80526 970 493 1901 FAX 970 493 1903 ...
Page 2: ... PREPARATION FOR USE 10 5 1 General 10 5 2 Initial Inspection 10 5 3 Electrical Installation 10 5 4 Mechanical Installation 10 5 5 Electrical Check 10 6 0 OPERATING INSTRUCTIONS 12 6 1 Power Up Procedures 12 6 2 Power Down Procedures 12 7 0 EXAMPLE WAVEFORMS 14 7 1 50 Ohm Resistive Load 14 7 2 Inductive Load Step Up Transformer 15 7 3 Capacitive Load 15 7 4 Current Source 16 8 0 TROUBLESHOOTING 1 ...
Page 3: ...ucts and associated hazards but it assumes no responsibility for the after sale operation and safety practices ALL PERSONNELWHOWORKWITH OR ARE EXPOSEDTO THIS EQUIPMENTMUSTTAKE PRECAUTIONSTO PROTECT THEMSELVESAGAINST POSSIBLE SERIOUS AND OR FATAL BODILY INJURY DO NOT PERFORMINTERNAL REPAIR OR ADJUSTMENTSUNLESS ANOTHERPERSON CAPABLEOF RENDERINGFIRST AID AND RESUSCITATION IS PRESENT 2 REV B ...
Page 4: ...stem The HVlOOO utilizes a patented state of the art high speed power MOSFETas the high voltage switch incorporated into a low impedance configuration featuring a multi layer stripline style output bus The HVlOOO requires an external high voltage DC supply 950V maximum and an input trigger The unit is available in either positive or negative polarities The polarity of the DC power supply must be t...
Page 5: ...er Rise Time 6ns Minimum Trigger Pulse Width 55ns Maximum Trigger Pulse Width l0us Input Trigger Connector Type BNC Side Panel OUTPUTPULSE ELECTRICAL CHARACTERISTICS Pulse Rise Time Negative Polarity 6ns 850V 10 90 Pulse Rise Time Positive Polarity l0ns 850V 10 90 Pulse Width 55ns to lOus Controlled by Input Trigger Pulse Recurrence Frequency Single Shot to 1MHz 5MHz burst controlled by input trig...
Page 6: ...ohms VIN IoUT PPEAK 950V 17 0A 14 50KW 525V 9 5A 4 50KW 105V 2 0A 0 20KW Pulse Droog All measurements into 50 ohms VIN 950V 950V 525V 525V 105V 105V PULSE WIDTH l 0us 10 ous 1 ous 10 ous 1 ous 10 0us 5 DUTY CYCLE MAX 1 4 10 PERCENTAGE DROOP 3 0 24 0 1 5 16 0 0 5 7 0 REV B ...
Page 7: ...he grounding conductor in the AC power cord is essential 3 1 2 Grounding The HVl000 is grounded through the grounding conductor of the AC power cord To avoid electrical shock plug the HVlOOO into a properly wired receptacle before making connection to any input or output connectors Use only a power cord that is in good condition 3 1 3 Cover Removal To avoid personal injury do not remove the cover ...
Page 8: ...nother person capable of rendering first aid and resuscitation is present 3 2 2 Internal Energy Storage The HVlOOO contains capacitors that are used as energy storage elements When charged these capacitors contain in excess of 1 5 joules of stored energy This is sufficient energy to cause serious injury Assure that the AC power cord is disconnected from the pulser and that the capacitor bank is fu...
Page 9: ...ohms Please consult the factory for further applications information 4 2 Pulse Risetime and Falltime The physical and electrical characteristics of the cable transmitting the pulse determine the characteristic impedance velocity of propagation and the amount of signal loss Several feet of cable can attenuate high frequency information in a pulse with a fast rise time It is therefore important to k...
Page 10: ...igh Voltage Input The HVl000 is rated at a maximum input voltage of 950VDC Proper precautions should be taken by the user to ensure that the maximum voltage is not exceeded The polarity of the DC power supply must be the same as the polarity of the HVl000 i e a positive polarity HVl000 requires a positive polarity DC power supply a negative polarity HVl000 requires a negative polarity DC power sup...
Page 11: ... 220VAC input from the factory 5 3 1 Input Power Cord The input power cord terminates externally in a three prong polarized plug The unit chassis is wired to the plug through the line cord and therefore the insertion of the plug into a compatible receptacle hooked up to a grounded input will automatically ground the unit The unit should not be operated without a grounded AC input 5 4 Mechanical In...
Page 12: ... TRIGGER INPUT 6 Connect an appropriate load to the BNC connector of the HVl000 labeled OUTPUT 7 Monitor the voltage across the load utilizing an appropriate attenuator 8 Turn ON the high voltage power supply Slowly increase the power supply to l00VDC The HVl000 should produce an output pulse of approximately 95V with a pulse width and pulse recurrence frequency following that of the incoming trig...
Page 13: ...he pulse generator is turned on or high voltage is present in the chassis assume it is possible to get a pulse on the output connector 6 1 Power Up Procedures The unit should be powered up using the procedures detailed in Section 5 5 1 When this is accomplished the pulser can be adjusted for the particular application through the following procedure 1 Monitoring the output of the HVlOOO on an osci...
Page 14: ...PULSER REV B 2 Leave the HVlOOO connected to the AC input without high voltage and with all connectors in place for approximately one minute to bleed off the stored energy 3 Disconnect the AC power to the unit 13 ...
Page 15: ...7 0 EXAMPLEWAVEFORMS 7 1 50 Ohm Resistive Load Input Voltage l0SV Pulse Width S00ns Pulse Recurrence Frequency lMHz Load 50 ohms Input Voltage 950V Pulse Width lO0ns Pulse Recurrence Frequency 4 5MHz Burst Mode Load 50 ohms 14 ...
Page 16: ...er Input Voltage 950V Pulse Width 200ns Pulse Recurrence Frequency 500Hz Oscilloscope Scale l000V DIV Load l000 ohm in secondary 7 3 Capacitive Load Input Voltage 150V Oscilloscope Scale SA DIV Load 0 lmF lKV Ceramic Capacitor Traces show Voltage and Current 15 ...
Page 17: ...DEI HVl000 PULSER 7 4 Current Source Input Voltage 575V Pulse Width 400ns Oscilloscope Scale l0A DIV Load 5 ohms 16 REV B ...
Page 18: ...roubleshooting Procedures Before attempting to service or troubleshoot the HVl000 review the servicing safety summary in Section 3 0 The power MOSFETutilized in the HVl000 is mounted underneath the printed circuit board and utilizes the case as a heat sink In the unlikely event that the MOSFET need be replaced it is highly recommended that the unit be returned to the factory for servicing The tabl...
Page 19: ...ting strap installed before fuse replacement is attempted Verify with a voltmeter that all circuits are de energized before servicing The voltmeter used to make these measurements must be certified for use at l000VDC and 220VAC or greater The fuses are located in the corner of the printed circuit board adjacent to the power entry module 8 2 Factory Service If the procedures above fail to resolve a...
Page 20: ...ross the MOSFETswitching device could never exceed the 950V maximum input high voltage It is possible to create voltages in excess of 950V by driving an open cable or by generating L di dt spikes From transmission line theory it is known that a voltage pulse launched onto an open cable will cause the voltage to reflect back down the cable and double in amplitude This voltage doubling will over vol...
Page 21: ...ited under the warranty to repair or replacement of products in kind Returns must be accompanied by a Directed Energy Inc return authorization number and conform to standard conditions for adjustment The aforesaid warranty shall expire twelve 12 months following the day of shipment from Directed Energy Inc s plant The foregoing states the entire warranty extended by Directed Energy Inc No other wa...
Page 22: ...DEI HVlOOO PULSER REV B APPENDIX A SCHEMATICS 21 ...
Page 23: ...D5 I 1N4744 I J 7o EARTH GROUND _ D6 Rl 1 K T2 I D7 E R12 J 7l FLOATING GROUND OFF CARD HVX ONLY 3019 1811 Q L POT CORE 3CB OR 3 __ __ POT CORE 3C8 J NOTICE THIS DOCUMENT CONTAINS PROPRlnARY INFORMATIONOF DIRECTED ENERGY INC AND JS NOT TO BE TRANS MITTED USED OR DISCLOSED TO ANYONE OR PARTY OR TO BE USEDAS THE BASIS fOR THE MANUFACTURE OR SALE OF ANY ARTICLE WITHOUT THE WRITTEN PERMISSION or DIREC...
