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AE Techron 7548 DC-enabled High Power Amplifier DC 100 kHz 12kW

Description

The AE Techron 7548 amplifier is a DC-enabled, high-powered unit designed to provide very low noise and fast slew rates. A single 7548 has an output capability of 100 amperes peak and 200 volts peak when driving typical MRI gradient coil loads. It can output a 40 mSec pulse with up to 105 amperes peak current into a 1-ohm load. If more current is needed, up to four amplifiers can be combined in series or parallel and operate as a single system.

The 7548 can operate in either voltage or current mode and features robust output devices and a power range of over 3300 watts RMS. It can safely drive a wide range of resistive, inductive loads.

Typical use includes as a power source for EMC testing in applications that require either continuous AC or DC signals and significant short term (burst) signals. It can be combined in a three-phase system ideal for MIL-STD-704F (AC and 28VDC tests).

Features

  • Over 12,000 watts peak for 40 mSec and 5,500 watts peak continuous into a 1-ohm load
  • 40 mSec pulses of up to 105 amperes peak into a 1-ohm load
  • System output of 800 volts and 70 amperes maximum are possible with multiple, interconnected amplifiers
  • Frequency bandwidth of DC to 50 kHz at rated power; DC to 100 kHz at reduced power
  • Rugged chassis for stand-alone or rack mounted operation. No additional power supplies are required
  • Protection circuitry protects the AE Techron 7548 from input overloads, improper output connection (including shorted and improper loads), over-temperature, over-current, and supply voltages that are too high or low
  • 7548 with “P” option offers precision control of output offset, DC drift and gain linearity
  • Shipped ready to operate from 208-volt (±10%) three-phase AC mains. Operation from 400-volt (±10%) AC mains are available on request

Specifications

AC Specifications

Standard

Ohms

PEAK OUTPUT

RMS OUTPUT

40mSec Pulse, 
20% Duty Cycle

5 Min, 
100% Duty Cycle

1 Hr, 
100% Duty Cycle

5 Min, 
100% Duty Cycle

1 Hr, 
100% Duty Cycle

Volts

Amps

Volts

Amps

Volts

Amps

Volts

Amps

Volts

Amps

Watts

open

200

0

200

0

200

0

141

0

141

0

0

16

195

12

195

12

195

12

138

8

138

8

1170

8

183

23

183

23

183

23

129

16

129

16

2104

4

165

41

165

41

165

41

117

29

117

29

3381

2

150

75

   

86

43

0

0

61

30

1848

1.5

134

90

 

1

116

105

 

0.5

66

112

 

Optional High-Current (HC) Version

Ohms

PEAK OUTPUT

RMS OUTPUT

40mSec Pulse, 
20% Duty Cycle

5 Min, 
100% Duty Cycle

1 Hr, 
100% Duty Cycle

5 Min, 
100% Duty Cycle

1 Hr, 
100% Duty Cycle

Volts

Amps

Volts

Amps

Volts

Amps

Volts

Amps

Volts

Amps

Watts

2

55

39

55

28

55

28

39

20

39

20

770

1

51

36

51

51

48

48

36

36

34

34

1152

0.5

26

52

26

52

26

52

18

37

18

37

676

AC Specification

Frequency Response

 DC – 30 kHz, +0.1, –0.5 dB

8 ohm Power Response

DC-40 kHz

± 180 Vpk

DC-50 kHz

± 150 Vpk

DC-150 kHz

± 50 Vpk

DC-200 kHz

± 25 Vpk

Maximum Continuous Output Power

3300 watts RMS

Power Sinking

1.2 kVA at 120VAC

Slew Rate

41 V/μSec

Phase Response

± 5 degrees (10 Hz - 10 kHz)

Unit to Unit Phase Error

+/- 0.1 degrees at 60Hz

Output Offset:

7548

Less than 5 mV, field adjustable to less than 1 mV

7548P

Less than 200 μV

Output Offset Current

Less than 10 mill amperes DC

DC Drift

7548

±1.5 mV

7548P

± 400 μV (from cold to maximum operating temperature); ±200 μV (after 20 minutes of operation)

Residual Noise

Unfiltered

Less than 75 μV

 

Filtered

 (400 Hz – 30 kHz): Less than 55 μV

THD

DC - 30 kHz less than 0.1%

Input Characteristics

Balanced with ground

Three terminal barrier block connector 20 k ohm differential

Unbalanced

BNC connector, 10 k ohm single ended

Gain

Voltage Mode

20 volts/volt

 

Current Mode

20 amperes/volt

Max Input Voltage

± 10 V balanced or unbalanced

Input Impedance

20 kOhm differential

Input Sensitivity

3.0V input for 3800W output into 1 ohm (adjustable)

Common Mode Rejection Range

± 11 VDC maximum

Common Mode Rejection Ratio

70 dB

Display, Control, Status, I/O

Front Panel LED Displays indicate

Run, Ready, Standby, Stop, and Fault conditions in the output stage

LCD Display

Lists type of fault condition and gives suggested corrective action

Soft Touch Switches for

Run (Enable), Stop, Reset

User Configurable

LCD display can be configured for up to four simultaneous displays reporting one, two or all four of the following: Voltage Peak, Voltage RMS, Current Peak, and Current RMS

Back Panel

Power Connection

NEMA-style locking receptacle; matching AC connector also included

Signal Output

4-position terminal barrier block

Signal Input

User-selectable Unbalanced BNC or Balanced Barrier Strip

Interlock Connector

25-pin D-sub connector used for amplifier control and status applications; also used in multi-amplifier applications

Communication Capabilities

Current Monitor

± 1V / 20A ±1%

Voltage Monitor

± 1V / 1V ±1%

Reporting

System Fault, OverTemp, Over Voltage, Overload

Control

Force to Standby; Reset after a fault

Protection

Over/Under Voltage

± 10% from specified supply voltage amplifier is forced to Standby

Over Current

Breaker protection on both main power and low voltage supplies

Over Temperature

Separate Output transistor, heat sink, and transformer temperature monitoring and protection

Physical Characteristics

Chassis

Black powder-coat chassis with all aluminum construction; designed for stand-alone or rack-mounted operation. The amplifier occupies five EIA 19-inch-wide rack units

Weight

103 lbs. (46.7 kg)

AC Power

Three-phase, 208 VAC ±10%, 47-60 Hz, 20A AC service (400 VAC ±10%, 15A version available). A toggle switch circuit breaker opens all legs of the AC mains on excess current demand.

Operating Temperature

10°C to 50°C (50°F to 122°F), Maximum Output Power de-rated above 30°C (86°F)

Humidity

70% or less, non-condensing

Cooling

Forced air-cooling from front to back through removable filters via four 100 ft3/min. fans. No space is required between rack-mounted amplifiers. Air filters are removable from the rear via one fastener per side and may be eliminated if cabinet filtration is provided.

Dimensions

19 in. x 22.8 in. x 8.75 in. (48.3 cm x 57.9 cm x 22.3 cm). Unit occupies five EIA 19-inch-wide rack units.

Standards

CISPR
CISPR 11
CISPR 14 - 1
CISPR 14 - 2
CISPR 14 - 2
CISPR 16 - 1
CISPR 16 - 2
CISPR 16 - 3
CISPR 16 - 4
CISPR 22
CISPR 24
IEC
IEC/TR EN 61000 - 1 - 1
IEC/TR EN 61000 - 2 - 1
IEC/TR EN 61000 - 2 - 3
IEC EN 61000 - 3 - 2
IEC EN 61000 - 3 - 4
IEC/TC EN 61000 - 3 - 5
IEC EN 61000 - 4 - 2
IEC EN 61000 - 4 - 3
IEC EN 61000 - 4 - 4
IEC EN 61000 - 4 - 5
IEC EN 61000 - 4 - 6
IEC EN 61000 - 4 - 7
IEC EN 61000 - 4 - 8
IEC EN 61000 - 4 - 9
IEC EN 61000 - 4 - 11
European
EN 50 081 part 1
EN 50 081 part 2
EN 55 011
EN 55 013
EN 55 014
EN 55 015
EN 55 020
EN 55 022
EN 55 024
EN 50 082 part 1
EN 50 082 part 2
EN 50 093
American
FCC Part 15
MIL-STD - 461E