CPE PDC5050 Pulser drives both resistive and capacitive loads by converting DC input power from single or dual positive and negative DC power supplies to deliver configurable pulses at the output. A high-voltage negative supply (0 to –5000 volt) is connected to the negative input. If positive reference pulsing is desired, a second positive power supply (0 to +200 volt) is connected to the positive input. The switches are fully protected from short circuits that occur at any point of operation. The PDC5050 will pulse to high voltages in any harsh environment.

1/4 MegaWatt Pulser

Pulse Voltage Range

• Pulsing from a reference voltage of zero to +100V as determined by the positive power supply voltage, to the pulse voltage of –50V to – 5000V.

Pulse Voltage Accuracy

• The accuracy of the pulse voltage is determined by:
  • The accuracy of the DC power supply feeding the PDC5050.
  • The voltage drop due to the output current and internal resistance (3 to 4 ohms)
  • The effect of output voltage droop determined by supply output capacitance.

Pulse Width and Duty

• For pulse widths (>90% of pulse voltage) from 0.5 µsec to DC (CW).
• Pulse duty from 0.0 to 1.0, expressed as a fraction
• Achievable duty is subject to voltage, current, and power limits.

Pulse Rise and Fall Times

• The rise time is defined as the time required for the output to go from 10% to 90% of the transition from low voltage to pulse voltage, and is dependent on the load and other conditions.
• Two stage capacitor banks with “feathered” transition between stages: 50 W resistor in series with the output for about 200 ns, followed by a resistance of 3 to 4 ohms for the remainder of the series switch on time.
• Actual rise and fall times are determined by the interaction of the two series resistances with the load.
• A capacitance of 2000 pF would have a rise/fall time of about 200 ns
• A capacitance of 10000 pF (50 V case) would have a rise time of about 600 ns
• Contact CPE for additional details

Pulse Droop

• Pulse droop is determined by the output conduction current during the flat top portion of the pulse.
• Negative output pulse droop: 0.02V*I/µsec
• Postive output pulse droop: 0.0005V *I₊/µsec
• Droop can be decrease with the addition of an external capacitor bank. Please contact CPE for a consultation before proceeding with an external capacitor bank.

Pulse Repetition Frequency (PRF)

• The pulser is designed to operate at up to 50 kHz
• Displacement current charge of up to 10 mC calculated as the capacitance times the pulse voltage.
• Pulse repetition frequency is limited by allowable internal power loss in the pulser due to repetitively charging and discharging the sum of output cable and load capacitance
• Power loss, C*Vpulse²*PRF, must be kept below 2200 Watts.

Pulse Conduction and Displacement Current

• 50A max at both pulse voltage and low voltage.
• 15 Amps RMS continuous output current.
• 150A maximum displacement current during the rising and falling edges.
• Total current is the sum of the displacement and the pulse conduction current.
• Time averaged power > 75 kW, limited by maximum voltages and currents
• Over current protected

User Interface

• 5V to 10V control signal provided by an external signal/pulse generator provides direct control of pulse width
• Optical interface box included

Front Panel Readouts

• 3-½ digit LED meters
• Negative capacitor bank voltage: 5kV full scale, 10V res, ± 20V accuracy
• Positive capacitor bank voltage: 200V full scale, 0.1V res, ± 0.2V accuracy
• Pulse current: 50A full scale, 0.1A res, ± 2% or 100mA accuracy

Installation

• 120VAC, 50/60Hz, 5A max.
• 19” rack mountable, 4U height, 22” deep
• Temperature range 5 °C to 35 °C
• Forced air, internal fans, 300 CFM
• Waste heat approximately 2200 W maximum
• Rear panel output connectors: Tyco 859527
• Mating connector: Tyco 863023-1 (provided)