7800 Series

10 – 20 kW, DC to 60 kHz, Three-Phase

7800 Series

High-power, high-precision, AC/DC linear power amplifiers

Stable when driving a wide range of resistive, inductive or capacitive loads
Four-quadrant operation (source and sink)
Field-selectable controlled-voltage or controlled-current operation
Protection circuitry protects the amplifier from input overloads, improper output connection (including shorted and improper loads), over-temperature, over-current, and supply voltages that are too high or low

Key Performance Capabilities:

Output Power: Up to 20 kVA continuous, 40 kVA short-term
Current: Up to 400A continuous, 800A short-term
Voltage: Up to ±500 Vp
Bandwidth: DC to 60 kHz, ±3 dB
Slew Rate: 40V/µs
THD: Less than 0.25% (DC to 20 kHz)
DC Drift: Less than ±400 µV (from room temperature to thermal shutdown)

SKU: N/A Category: Series

Request a Quote

Ask a Question

OVERVIEW

AE Techron’s 7800-Series AC power amplifiers are durable, four-quadrant, DC-enabled, low-noise, wide-bandwidth amplifiers. This combination of features and capabilities makes them a great choice for a large number of research and industrial applications.

7800 series amplifiers are a great solution if bandwidth and/or system noise is a problem. They are able to drive low-impedance loads at frequencies of up to 60 kHz. Because they utilize a linear circuit topology, AE Techron 7800 series amplifiers have no switching noise in their output and very low radiated EMI. This results in THD and noise floors that are much lower than what is possible with traditional switch mode amplifiers, making them ideal for applications that require either high precision or, because of sensitive measurements, cannot tolerate the radiated noise associated with switch mode amplifiers.

7800 series amplifiers are tough, both physically and electrically. 7800 series models have been used for conducting experiments on a Navy warship, controlling a magnetic field in a fusion experiment, and driving DUTs while absorbing back EMF when there is a failure.

The 7800 series is designed and built for applications where large surge currents or long duration power is needed. This makes them ideal for applications where power or duty cycle requirements are greater than is possible with consumer- or pro-audio grade amplifiers. Because power ratings are continuous, AE Techron amplifiers often produce between 4 and 8 times more power than a similarly rated consumer amplifier.

7800 Series amplifiers are modular and scalable. They are available in three standard power ranges: 10kVA, 15kVA and 20kVA. Within each power range, models are available that have been optimized for load impedances from 0.1 ohm to 8 ohms. Customized versions can be ordered with special amplifier configurations and/or with extra rack space to install additional equipment.

SPECIFICATIONS

Performance Specifications (all models)

Testing performed at 208V/415V AC. 7800 series amplifiers can operate from 400V AC ±10%. Since these amplifiers have an unregulated power supply, low line conditions may slightly affect the maximum voltage potential. All testing was performed in Controlled-Voltage (CV) mode. Accuracy was measured when driven into a 10-ohm load with between 0.1V DC and 6V DC or between 0.2V AC and 5V AC presented at its inputs.

Bandwidth (-3dB): DC to 60 kHz
Phase Response (10 Hz – 10 kHz): ±8.3 degrees
Unit to Unit Phase Error: ±0.1 degrees at 60 Hz
Output Offset: <±200 µV
Output Offset Current: <10 mA, DC
Residual Noise, 10 Hz to 20 kHz: <250 µV (<0.25 mV)
THD (DC – 20 kHz): <0.25%
DC Drift,
- From Cold to Maximum Operating Temperature: <±400 µV
- After 20 Minutes of Operation: ±200 µV
Output Impedance: 3.2 mΩ in Series with 2.2 µH

Input Characteristics

Unbalanced BNC connector: 10 kΩ single-ended
Gain,
- Voltage Mode: 40 volts/volt
- Current Mode: 40 amperes/volt
Gain Linearity (over input signal, from 0.2V to 5V),
- DC: 0.0125%
- AC: 0.030%
Max Input Voltage: ±10V, balanced or unbalanced
Input Impedance: 20 kΩ differential
Input Sensitivity: 3.0V input for 3800W output into 1 ohm, adjustable
Common Mode Rejection Range: ±11V DC maximum
Common Mode Rejection Ratio: Better than 70 dB

Status Display, Control, I/O

Front Panel LED Displays indicate: Ready, Standby, Fault
Soft Touch Switches for: Run, Stop, Reset
LCD Display: Can be configured for up to four simultaneous displays reporting one, two, or all four of the following: Vp, VRMS, Ap, ARMS. Also reports any fault conditions that occur and suggests corrective action.
Back Panel Power Connection: Barrier strip
Signal Output: Back-panel high-current connectors
Signal Input: Back-panel unbalanced BNC

Communication Capabilities

Reporting: System Fault, Over Temp, Over Voltage, Over Load

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-coated heavy-duty steel frame and panels
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 filters via six 100ft3/min. fans.

MODEL COMPARISON

	PEAK OUTPUT				MAX SHORT-TERM OUTPUT				MAX FREQ
Model	Volts	kW	Volts RMS	Amps RMS	Volts ± Pk	Load Ohms	Amps ± Pk	Load Ohms	-3 dB
7810-100-100	10	100	100	1	180	16	400	0.25	60 kHZ
7810-200-50	10	200	50	4	360	24	200	1	60 KhZ
7810-50-200	10	50	200	0.25	100	16	400	0.125	60 kHz
7815-100-150	15	100	150	0.67	180	24	600	0.167	60 KhZ
7815-300-50	15	300	50	6	540	32	200	1.5	60 KhZ
7815-50-300	15	50	300	0.167	100	16	600	0.083	60 KhZ
7820-100-200	20	100	200	0.5	180	16	800	0.125	60 KhZ
7820-200-100	20	200	100	2	400	24	200	1	60 KhZ
7820-50-400	20	50	400	0.125	100	16	800	0.062	60 KhZ