EC750SA / EC1000SA - Programmierbare AC/DC-Stromquelle

• Max. Ausgangsspannung: 310 V
  • LED-Treiber-Eingangsspannungstest
  • Unterstützung für LED-Treiber-Eingangsspannung von AC90 V bis 305 V (weltweite Spezifikationen)
     

• AC+DC-Modus
  • Bewertung von DC-DC-Wandlern
  • Für Rauschüberhöhungsprüfung und Ripplestromprüfung
     

• DC-Offset-Einstellung
  • Ansteuerung von Transformatoren und induktiven Lasten
  • Vermeidung von magnetischer Sättigung durch Einstellung der DC-Offsetspannung auf Null

Hybrid Power Contol

Technology of achieving stable outputs

The hybrid power contol integrates the negative feedback control (analog control technology), which is NF's core technology, and intelligent digital control technology.
Analog technology is provided when wide-band, high response is required, and digital technology is provided for flexible control according to load condition.
The hybrid power control achieves highly stable and robust output by taking full advantage of both analog and digital characteristics.

Basic Performance and Functions    

A Variety of Outputs

With AC 1 kVA, full-power 1 kW output is also available for DC. In the AC+DC mode, the EC1000SA can output power which superimposes an alternating current (sine, square, or arbitrary wave) over a direct current.

Alternating current (AC)

*1 The limit on max. output power reduces max. output current.

Direct current (AC + DC)

*1 The limit on max. output power reduces max. output current.
*2 The ranges in the AC superimposition are AC output voltage ranges (See the above table.)

Operation mode

Eight output modes combining two operation modes and four signal source modes can be set. The most appropriate mode for an application can be selected.

Maximum output peak current

A peak current equal to four times the maximum output current to the capacitor input rectifier load (crest factor : 4) can be supplied.

Limiter function

Output current limits can be set with positive/negative values, and RMS values. In the evaluation of a prototype, this function is useful for protection when an abnormal current is caused by abnormal operation of the load.

Protection function

The EC1000SA has a built-in function for protecting the power source itself if a problem occurs due to issues such as output overvoltage or overcurrent, power unit trouble, internal control problems. If a problem occurs, it is displayed on the panel and output is turned off.

Mesurement function

The EC1000SA is equipped with high accuracy measurement functions for measuring synchronization frequencies, load power factors, and even the harmonic currents, in addition to the voltage, current and output. Setting values and measurement values are simultaneously displayed on large-screen display.

Measures:

• Output voltage (effective, DC average, and peak values)
• Output current (effective value, DC average value, peak value, and peak value hold)
• Output power (active, apparent, and reactive power)
• Frequency (at external synchronization)
• Load power factor
• Load crest factor (CF)
• Output harmonic current (fundamental wave : 50/60 Hz, up to the 40th order).
  This measurement does not comply with the IEC standards.

Measurement Results and Setting Values     Measurement of Output Harmonic Current 

Measurement Results and Setting Values

Measurement of Output Harmonic Current

Interface and External Control I/O

Interfaces and an external control I/O provide support for system integration and automation.

• RS-232
• USB
• External control I/O
  
  • Control input:
    output on/off, sequence control, memory recall
  • Status output:
    power on/off, output on/off, protection operation, limiter operation, output range, sequence, etc.

Other Functions

• External Signal Input
  EXT: Amplifies external signal, used as a power amplifier
  SYNC: Synchronization of signal source frequency with external signals
  ADD: Addition of external signals to internal signals
• Setting Range Limit Function
  Limits the setting range for the output voltage and frequency
• Setting Memory
  30 setting statuses

User Interfaces Designed for Ease-of-use    

Small and Light

EC1000SA features a compact design for convenient desktop use. It weighs approx. 9.7 kg and can be easily carried anywhere.

Large-screen Display

Setting and measured values are displayed on a large, easy-to-read screen (5.7-inch with a backlight).

Universal Outlet

A universal AC outlet (service outlet) is equipped on the front panel . Various types of power plugs around the world can be connected.

Worldwide Power Supply Input

Power input ranging from AC90 V to 250 V provides worldwide compatibility.

 

Abundant Functions for Improving the Efficiency of Power Supply Testing    

Sequence Function

Programming of various test patterns such as test repetition, combinations of complex test condition, and long-term testing enable automated test sequences. Power source tests for each export destination can be performed efficiently.

Overview of sequence function

• Number of steps : up to 255 (within one sequence), 0.1 ms/step (minimum)
• Parameters : DC voltage, AC voltage, frequency, waveform, 2-bit step synchronization output

Setting Screen for the Sequence Function (set for each step)

Example : Voltage fluctuation test pattern

The control software enables basic parameter settings, data logging, arbitrary wave editing/transfer, and sequence editing/ control. It supports automation of measurement data analysis in product development and of various tests in production lines.

• Sequence : Edit, execute and save a series of output variation pattern
• Arbitrary Waveform : Create and edit waveforms
  
• Logging : Read and save measured values

Remote Control	Sequence Editing
Creation of Arbitrary Waveform	Logging of Measurement Values

Unit: mm