TCR 600S1.6 EMI DC Power Supply Used

Applications

• Semiconductor aging racks
• CW lasers
• General Industrial DC Power
• Capacitor forming
• Focusing coils for accelerators
• Cryogenic magnet applications
• Electroplating
• Battery charging
• ARC lamp power supplies
• DC Motor drive supplies

The TCR600S1.6 is a very robust design of the SCR phase controlled regulated power supply. In an SCR phase-controlled DC Power Supply, output is controlled by modulating the conduction angle of the controlled SCRs. In the TCR Series, input AC is applied to three pair of bi-directionally connected SCRs placed within the delta connected primary of the main power transformer. The secondary voltage of this transformer is rectified and double L/C filtered to provide a low ripple DC output.

Both output voltage and current are sensed and compared against internal references or externally applied control levels so the supply provides either constant voltage or constant current regulation with automatic crossover depending on control level. Additional circuitry provides bias levels, circuit protection and metering functions.

AC Inrush

The EMI TCR600S1.6 is "soft-started" so that on turn-on or during power interruption and reapplication, the input SCRs slowly phase-in from non-conduction to a conduction mode. There is no magnetic inrush current.

RFI/EMI

The EMI TCR600S1.6 contains an internal RFI filter employing ferrite toroidal chokes and "X" and "Y" VDE listed capacitors.

Load Effects

Constant voltage mode: Variations in output current from 5 to 100% of maximum rating cause output voltage variations of less than 0.1% of the output voltage setting when output is 50 to 100% of maximum rating. Below 50% output voltage, output variation will not exceed 0.05% of maximum output.

Constant current mode: Variations of output voltage from 5 to 100% of maximum rating will result in output current variations of less than 0.1% of the output current setting when output is 50 to 100% of maximum rating. Below 50% output current, output variations will not exceed 0.05% of maximum output.

Line Effects

When operating in either constant voltage or constant current mode, variations in the regulated output will not exceed 0.1% of 50 to 100% of output. Below 50% output variations will not exceed 0.05% of maximum rating.

Ripple

Output voltage ripple shown in rating table is worst-case under any resistive load condition with the power line within specification. The highest ripple typically occurs at 50% output voltage and current and is lower as maximum output voltage and current is approached.

Transient Response

A 30% step increase in power demanded by the load will cause a transient in the regulated output which will typically recover to within 2% of final value within 75ms.

Stability

The stability of output voltage or current will remain within ±0.05% of set point for 8 hours after warm-up under fixed line, load and temperature conditions.

Temperature Coefficient

The temperature coefficient of the output voltage set point is 0.02%/°C of the maximum output voltage rating of the supply.

The temperature coefficient of the output current set point is 0.03%/°C of the maximum output current rating of the supply.

Operating Temperature

All models operate within specification at continuous duty from 0°C to 40°C. Units may be safely stored at temperatures of -40°C to +85°C. Critical circuitry is thermostat-protected. Cooling is provided by a fan and air is ducted horizontally to prevent adjacent unit heating.

Controls and Instruments

All models provide AC turn on/off and circuit protection by means of a UL-rated input circuit breaker. Output control is provided by a 10-turn voltage control and a one-turn current control. Output indication is by voltage and current panel meters, available as analog or optionally available digital displays.

Over Voltage Protection

Optional over voltage protection (OVP) is available to protect the load from output over voltage above an adjustable set point of 50 to 110% of rated output. OVP action includes crowbar output, down program unit and open input circuit breaker.

Programming

The supply may be controlled locally or remotely. In the remote programming mode, externally provided resistance voltage or current will control the supply output. Programming sensitivity is 5000 Ohms, 5 volts or 1 mA for full scale voltage output or 100 Ohms, 100 mV or 1mA for full scale current output.

Remote Sensing

Separate output sensing terminals are provided to sense remotely the output at a distant load. This feature compensated for the voltage drop in the power distribution system and provides specified regulation at the point of load.