PA-LV124/148 – 12kVA

Linear regulated HERO®power Amplifier System

 

The latest Exclusive Modular System for automotive tests according LV124/148

and associated standards defines new benchmarks and vital advantages.

 

 

Examples:

PA-LV124/148 – 12kVA

Constructed as a linear regulated 4-Quadrant amplifier for Source / Sink operation.

Selectable versions are:

symmetrical (same swing for positiv and negative drive)

asymmetrical (negative swing may be required just for polarity testing) or

unipolar for battery simulation or testing

(for just replacing the battery or charging / discharging the battery)

multiple power ranges: e.g. 2 power ranges are standard,

which you may switch local or remote from LV124 to LV148

Control quantity may also be switched, local or remote, from V-regulation to

C-regulation within msec by digital command.

 

For instance:

Powerrating range: LV124-AS  (asymmetrical)

Continuous: 300A;   Inrush Current  500A

Dynamic: AC … >200kHz …0.1dB sin @ rated load,

DC … >100kHz …6dB arb @ rated load

 

Powerrating range: LV148-AS  (asymmetrical)

Continuous: 150A;   Inrush Current  300A

Dynamic: AC … >200kHz …0.1dB sin @ rated load,

DC … >100kHz …6dB arb @ rated load.

 

 

 

 

Applications

 

Hero®Precision Power Amplifiers

are true linear voltage and current regulated, bipolar Power Supplies from DC to MHz. A wide range of high sophisticated models are designed to cover extreme requirements.

 

Such as: (see image catalogue for Power Amplifiers—36 pages)

• Rotor craft: development of piezoelectric actuators for trailing edge flap control of full scale rotor blades
• Large magnets like quadrupols for accelerators
• Simulation of batteries in automotive and avionic power systems
• Load simulation for batteries as well as for generators
• Simulation of subsystems in automotive and avionic power systems
• Simulation of interrupts and discontinuance in automotive, avionic and public-lines power systems
• Excitation of piezoelectric actuators for rotor blades and airframes
• Calibration of current transformers, voltage transformers and power meters for power transformers up to MVA
• Test of magnetic materials for switching applications
• Test of capacitors
• Research on fuel cells
• X- / Y-deflection for precise coating and plating
• Testing of solar cell arrays for space application
• Powering of electro-chemical reactions
• Research on piezoelectric motors and motion
• Test of power line filters
• Polymer research
• … and many more

 

Their main features are:

• Linear regulated without switching devices to avoid ripple and noise
• Up to over 90dB signal to noise ratio, including line frequency
• True 4-quadrant ± voltage and ± current regulated as source and sink
• Precise and smooth operation at zero and transition through zero, without any switching
• Direct linear regulated output voltages up to ±1000V
• Direct linear regulated output current up to over ±400A
• Direct linear regulated output power up to over 40kW per channel
• Frequency ranges from DC to 2MHz
• Rise time less than 1µs (0.4µs) for ±40V / ±60A
• Rise time 1000V / µs for 100Vrms / 0.5A
• True arbitrary regulation
• Transient recovery to 0.3µs max
• Temperature stability to 5ppm (0.0005% / °C)
• Protection against overtemperature, short circuit, reverse current
• Local and/or remote control

 

Learn more:

HB-LV124148_en.pdf (3MB)

 

Norm, Lösungen, Tests, Prüfverfahren, In der Praxis, Seminar/Fachtagung

 

 

 

 

 

Verstärker

 

Dies ist ein Leitfaden, mit dem man den Leistungsverstärker, den die Applikation benötigt, einfach definieren kann.

 

 

1)  Getaktet – oder linear geregelt?

 

 

Eigenschaften getakteter Verstärker:

 

• Einsatzgebiete:  Bei Anwendungen, bei denen die Störungen unkritisch sind, bzw. die Störungen durch Filterung oder induktive Lasten tolerierbar sind.

 

• Negativ:  Schlechter Wirkungsgrad
• Positiv:  Einsatzgebiete: Präzisions-Prüf- und -Testgeräte und -Anlagen;

 

2)  Ist die Entscheidung für einen linear geregelten Verstärker naheliegend,
oder sollen dessen Möglichkeiten genauer untersucht werden?

Texte aus PA-LV124/148 verwenden

Wie bestimme ich die Qualität einer getakteten Quelle?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Kalibrierung hochpräziser Stromwandler

Dazu werden benötigt:

1) als Referenz einen rückführbar kalibrierten Shunt mit 20A

2) eine stabile DC-Versorgung

3) eine kalibrierbare AC-Quelle wie den PFL2250-28-UDC415-IDC375 mit Cooling Panel

Messaufbau

Prüfling: Flux Zero-Stromwandler

LEM Wandler LF310-S/SP16;mit 30 Windungen

Inventar Nr.

 

Referenz-Strom:

Precision Current Shunt FLUKE A40B-20A

Inventar Nr: 0330

 

Stromquelle:

HERO®power Leistungsverstärker PFL2250-28UDC415-IDC375

 

Messmittel:

- Stromzange:  Chauvin Arnoux 100A/100kHz  Inventar Nummer: 0034

- Oszilloskop: YOKOGAWA DL850                    Inventar Nummer: 0182

- Funktionsgenerator: HP 33120A                     Inventar Nummer: 0017

- Isoliermessverstärker ARCUS T303-A zur galvanisch getrennten
   Spannungsmessung des Referenz-Current-Shunts

- DVM diverse