Constant current output feedback synthesis of use (hereinafter referred to as the constant current DDDL-H current of generator is an up flow reactor), is my company uses Germany the new module, and my company's existing technology in 2004 in the second half of their own research and development of test equipment, uses the numerical control technology, anti-interference ability is strong, and a generation of up flow is compared, with low power consumption, high capacity of self coupling voltage regulating device, and the hardware of the IGBT tube and high permeability core produced by the converter, through SPWM, inverter, PID control, measurement and software compensation and other new technology, product, power, small volume, weight light, good waveform, output stability, response speed, etc.. Mainly used for thermal relay, motor protector, contactors, breaker device, high voltage fuse, air switch, switch cabinet, circuit breaker, protection screen calibration, for a busbar protection and a variety of current transformer ratio test project, suitable temperature Shengheng flow experiment, is widely used in electric power, railway, petrochemical, metallurgy, mine and so on enterprise of scientific research, production and electrical field test.

SPWM hardware adjustment technology, fast response, stable output;

High power MOS/IGBT drive, reliable operation, strong overload ability;

Suitable for resistance, inductive, rectifier and other kinds of load;

With the voltage upper limit, lower voltage, overheating, and other abnormal conditions to protect the function;

Has the parameter memory function, the shortcut key operation way, uses the simple convenience;

Power frequency, current online adjustable;

The use of high brightness LCD six bit LCD display, clear and eye-catching, visual angle, convenient production line use;

With RS232 communication interface, the baud rate is 9600.

2.2 main application and scope of application

Professional laboratory (EMI/EMC/ security);

Manufacturing plant (quality assurance / life test);

Export product testing, simulation of the power grid;

Product research and development test.

Product type: DDDL-3000H

Input power: single-phase 220 + 15%, 50/60Hz + 5Hz

The opening of output voltage: 5V according to the load design

The adjustable output current: 0~3000A

The output frequency: frequency: 45 ~ 65Hz;

The frequency stability: less than 0.1%

The current stability: less than 1% (test point: 220V, 50Hz resistance at full load)

The degree of distortion: less than 1.5% (resistive load)

The crest factor: 1.41 + 0.10

The source voltage effect: less than 1%

The load effect: less than 1%

The efficiency: 85%

The frequency of display: six and a half LCD, resolution 0.1Hz

The voltage display: six and a half LCD, resolution 0.1V

The current display: Six - LCD, resolution 0.1A/0.1A

The power display: Six half LCD, resolution 1W/0.1kW

The power factor showed: six and a half LCD, resolution 0.01

The alarm function: protection device (AO) after the alarm signal, and display fault code;

The working environment: temperature: -10 to 40 DEG C; relative humidity: 10% ~ 90% (40 C)

The overheating protection: power device temperature higher than 85 DEG C + 5

The shell protection grade: IP2X

The chassis structure: Desktop