Rohrer Gmbh

• Test of magnetic materials for switching applications
• Helmholtzcoils
• Research on piezoelectric motors and motion systems
• Piezo- Actuators for ultrasonic applications
• Polymer research
• Short time dynamic
• Transmitting and Receiving Aerials

• Output connectors: 4mm socket for banana jacks
• Protections: short circuit proof; protected against switching inductive loads;
• Construction: 19” plug in, 6unit high

List of the most popular types and theoretical possibilities: please click below

• Test of magnetic materials for switching applications
• Helmholtzcoils
• Research on piezoelectric motors and motion systems
• Piezo- Actuators for ultrasonic applications
• Polymer research
• Short time dynamic
• Transmitting and Receiving Aerials

• Output connectors: 4mm socket for banana jacks
• Protections: short circuit proof; protected against switching inductive loads;
• Construction: 19” plug in, 6unit high

List of the most popular types and theoretical possibilities: please click below

• Test of magnetic materials for switching applications
• Helmholtzcoils
• Research on piezoelectric motors and motion systems
• Piezo- Actuators for ultrasonic applications
• Polymer research
• Short time dynamic
• Transmitting and Receiving Aerials

• Output connectors: 4mm socket for banana jacks
• Protections: short circuit proof; protected against switching inductive loads;
• Construction: 19” plug in, 6unit high

List of the most popular types and theoretical possibilities: please click below

PA9812B HERO® Precision Power Amplifier for arbitrary applications

Application example:
Development of a piezoelectric actuator for trailing edge flap control of full scale rotor blades – Alfred Gessow Rotorcraft Center, Dept. of Aerospace Engineering Washington, DC.

Main features
• precise and smooth operation at zero and transition through zero,
without any switching
• true 4-quadrant ± voltage regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to
noise ratio
• output impedance vs. 0 Ohm

Key features
• remote operation
• 2 analogue BNC- inputs for computer controlled current limiters; separately for +Ia and -Ia
• Control quantity: ± Ua
• input: DC - coupled
• no 50 Ohm problems as related with other power amplifiers
• input impedance: 100 kOhm
• output impedance: almost zero at DC in U-mode
• Dynamic range: > 80db
• offset stability: 0,005%/K
• Zero stability: 0,005%/K
• Linearity: 0,005%/K
• Sense lines for Ua
• Analogue BNC output for sense line tests; scaling: 0V = ohm; 10V = 1 Ohm
• Analogue BNC- monitor for ± Ua; scaling: 10V = 100% of operating range; decoupled and short circuit proof
• Analogue BNC- monitors for Ia; scaling: 10V = 100% of operating range; decoupled and short circuit proof
• Output connectors: 4mm sockets for banana jacks
• Potential Relations: isolated from line; floating construction up to ±30 V min. / ±50 V max. in respect to ground
• Protection: short circuit proof; protected against switching inductive loads
• Overload: automatic limiting according to the specs; this status will be reported by a LED on the front panel and / to remote control; shut down of the amplifier is available on request
• Construction: 19” plug-in 6 units high

Main features
• 2 selectable, asymmetrical output ranges
• precise and smooth operation at zero and transition through zero,
without any switching
• true 4-quadrant ± regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to
noise ratio
• output impedance vs. 0 Ohm in U-mode; vs. infinite in I-mode

Main features
• outstanding stability
• precise and smooth operation at zero and transition through zero,
without any switching
• true 4-quadrant ±UA regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to
noise ratio
• output impedance vs. 0 Ohm

Main features
• precise and smooth operation at zero and transition through zero,
without any switching
• true 4-quadrant ± voltage regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to
noise ratio
• output impedance vs. 0 Ohm

Main features
Output ranges
• 4 selectable output ranges, 2 asymmetrical and 2 symmetrical ones
Range R1A: +60V / -10V; ± 50A cont. / 150 A-200ms; DC to 100 kHz-6db
Range R2A: +30V / -3V; ± 50A cont. / 150 A-200ms;
Range R1B: ± 50V / ± 50A cont. / 150 A-200ms; DC to 100 kHz-6db
Range R2B: ± 30V / ± 50A cont. / 150 A-200ms;

PA2082
Ua- / Ia- operation; isolation input to output
R1: ± 50 V / ± 60 A – 150 A/200ms DC…50 kHz
R2: ± 25 V / ± 60 A – 150 A/200ms

PA2087(picture)
Ua- / Ia- operation; isolation input to output; monitors floating
R1: ± 50 V / ± 50 A – 150 A/200ms DC…50 kHz
R2: ± 25 V / ± 50 A – 150 A/200ms

HERO® Precision Power Amplifier for arbitrary applications
• precise and smooth operation at zero and transition through zero, without any switching
• true 4-quadrant ± regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to noise ratio
• output impedance vs. 0 Ohm in U-mode; vs. infinite in I-mode

PA9602A; Ia- operation; ± 8 A / ± 58 V; DC…0.1Hz;
PA9603A; Ia- operation; ± 5 A / ± 14 V; DC…0.1Hz; dual
PA9604A; Ia- operation; ± 3 A / ± 32 V; DC…0.1Hz; dual
PA9611A; Ia- operation; ± 20 A / ± 10 V; DC…0.1Hz;
floating construction – common: ±30 V < ±50 V in respect to ground

HERO® Precision Power Amplifier for arbitrary applications
• precise and smooth operation at zero and transition through zero, without any switching
• true 4-quadrant ± regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to noise ratio
• output impedance vs. infinite in I-mode

mu
• precise and smooth operation at zero and transition through zero, without any switching
• true 4-quadrant ± regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to noise ratio
• output impedance vs. 0 Ohm in U-mode; vs. infinite in I-mode

Ia - operation
1 channel ± 10V UE = ± 1A IA / 20V
DC… 30 kHz -3db
Potential Relations: isolated from line; floating up to ±30 V min. / ±50 V max. in respect to ground
Attention should be paid to: potential overview and endorsements (voltage limiter)

Ia - operation
Channel 1: ± 10 V UE = ± 1A IA / ± 20V
Channel 2: ± 10 V UE = ± 10 A IA / ± 20V
DC… 30 kHz -3db
Potential Relations: isolated from line; floating up to ±30 V min. / ±50 V max. in respect to ground
Attention should be paid to: potential overview and endorsements (voltage limiter)

Output rating ± 50 V / ± 10 A
• UA- / IA-operation switchable
• Control quantity: selectable ± UA / ± IA
• 2 adding inputs: DC - and AC - coupled
• adding Zero offset ± 100 % selectable 0…+100 % / 0…-100 % / off
• Gain switchable cal - var 0…100 %
• Dynamic range: > 80db
• offset accurancy: 0,005%/K
• Linearity: 0,005%/K
• Potential Relations: isolated from line; floating up to ±30 V min. / ±50 V max. in respect to ground
• construction: 19” plug in; 4 U high

PFL-136-U040-510 Series PFL-XXX-UXXX-XXX
(picture PFL240-U080DC1M0)

The superfast series up to ± 400V / ±30A / DC to 1.4 MHz.
This is an exceptional modular concept. The modules with
± 40V / ± 1.5A may put in series or / and in parallel.
• no 50 Ohm problems as related with other power amplifiers
• input impedance: 10 kOhm
• output impedance: almost zero at DC

Pilot scheme for switched mode drives
• Helmholtz coils

Key features
• ± 50 V / ± 3 A continuing; inrush current capable
• Control quantity: ± Ua
• input DC - coupled: 1 V in = 10 V out
• no 50 Ohm problems as related with other power amplifiers
• input impedance: 100 kOhm
• output impedance: almost zero at DC in U-mode
• Dynamic range: > 80db
• offset stability: 0,005%/K
• Zero stability: 0,005%/K
• Linearity: 0,005%/K
• Analog monitors for Ua and Ia ; decoupled and short circuit proof
• Output connectors: 4mm socket for safety banana jacks
• Potential Relations: isolated from line; floating construction; common up to ±30 V min. / ±50 V max. in respect to ground
• Protections: short circuit proof; protected against switching inductive loads;
• Overload: automatic limiting according to the specs; this status will be reported by a LED on the front panel and / to remote control; shut down of the amplifier is also available on request.
• Construction: 19” plug in, 3unit high

Range B1:± 1.5 A / ± 150 V; Ia- operation; DC…>10 kHz
Range B2: ± 8.5 A / ± 48 V; Ia- operation; DC…>10 kHz
isolation Input-Output

HERO® Precision Power Amplifier for arbitrary applications
• precise and smooth operation at zero and transition through zero, without any switching
• true 4-quadrant ± regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to noise ratio
• output impedance vs. infinite in I-mode

Test of magnetic materials for switching applications
• Helmholtzcoils
• Research on piezoelectric motors and motion systems
• Piezo- Actuators for ultrasonic applications
• Polymer research
• Short time dynamic
• Transmitting and Receiving Aerials

• Output connectors: 4mm socket for banana jacks
• Protections: short circuit proof; protected against switching inductive loads;
• Construction: 19” plug in, 6unit high

List of the most popular types and theoretical possibilities: please click below

The superfast series up to ± 400V / ±30A / DC to 1.4 MHz.
This is an exceptional modular concept. The modules with
± 40V / ± 1.5A may put in series or / and in parallel.
• no 50 Ohm problems as related with other power amplifiers
• input impedance: 10 kOhm
• output impedance: almost zero at DC

HERO® Precision Power Amplifier for arbitrary applications
• precise and smooth operation at zero and transition through zero, without any switching
• true 4-quadrant ± regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to noise ratio
• output impedance vs. 0 Ohm in U-mode;

The superfast series up to ± 400V / ±30A / DC to 1.4 MHz.
This is an exceptional modular concept. The modules with
± 40V / ± 1.5A may put in series or / and in parallel.
• no 50 Ohm problems as related with other power amplifiers
• input impedance: 10 kOhm
• output impedance: almost zero at DC

HERO® Precision Power Amplifier for arbitrary applications
• precise and smooth operation at zero and transition through zero, without any switching
• true 4-quadrant ± regulated source and sink
• linear regulated for lowest ripple and noise as well as for best signal to noise ratio
• output impedance vs. 0 Ohm in U-mode;