Product overview:

Ws-erd1000 series programmable DC feedback load can not only simulate various load characteristics, but also feed back electric energy to the power grid without pollution. It is the inevitable trend of the development of electronic load at present. Compared with ordinary resistive load, its working mode is to recycle the output energy of the tested power supply on the premise of completing the test power experiment by using power electronic conversion technology, which not only saves energy, but also does not produce a lot of heat, and avoids the problem of increasing the ambient temperature of the test site. The electronic load does not convert the test power into heat energy, so there is no need to use a bulky resistance box and cooling equipment, saving the installation space. Because the energy feedback method is adopted, the test site does not need to be equipped with large power capacity, which reduces the cost of power supply capacity.

Product features:

Programmable DC feedback load adopts four quadrant PWM rectifier and interleaved parallel DCDC conversion two-stage circuit to output DC with high precision and high power quality; The main control part adopts full digital circuit design, and the main control chip adopts TI DSP chip to realize high dynamic response and meet the test needs of customers.

The load is composed of two-way three-phase full bridge inverter unit and DCDC unit, with built-in power frequency transformer. DCDC circuit can raise the input DC voltage into high voltage to supply three-phase full bridge circuit. Therefore, the DC input range of power supply is wide and can meet the input range of 24-800v; The load itself supports two-way energy flow, and can set a variety of working modes, which can be used in different test occasions.

Bidirectional DCDC circuit adopts interleaving parallel technology, with small DC ripple and high precision, and the power supply meets the requirements of high-precision test; The four quadrant PWM rectifier adopts SVPWM control mode, which has high AC power factor, small output current harmonic and high conversion efficiency.

Electrical schematic diagram:

The main control part is a full digital control circuit, the main control chip adopts ti's 32-bit DSP processor, and the display part adopts 7-inch touch screen, which is simple to operate;

The main circuit is composed of PWM rectifier and DCDC, which can realize two-way flow of energy, high AC power factor and low harmonic; The DCDC part adopts interleaving parallel technology, with high DC output precision and small ripple, which meets the requirements of high-precision test;

Power frequency transformer is adopted for input and output electrical isolation;

IGBT adopts Infineon original imported module, the driving chip adopts Mitsubishi driving chip, and the main components are products of domestic and foreign first-line manufacturers to ensure the stable and reliable operation of power supply;

The power part adopts modular design, which is simple and convenient to maintain;

High precision and fast dynamic response to meet different testing and detection applications;

Constant voltage, constant current, constant power and other working modes can be selected to meet a variety of test applications;

It has 485, Ethernet, USB interface and other communication interfaces, and can communication interface is optional to facilitate user system integration;

The interface and function upgrade are convenient and fast to meet the changeable needs of customers in the later stage and save investment in the later stage;

Product areas:

It is mainly applicable to many applications such as motor test, electronic control test and power battery pack test in the new energy vehicle test system, and can meet the test requirements of different stages such as R & D, type test, reliability test and delivery inspection in the system; Industrial application can be applied to many industries and occasions, mainly replacing old and backward power supply technology; Due to the use of four quadrant PWM rectifier, the AC power factor can be up to more than 0.99, and the AC current harmonic is less than 3%. Compared with the backward thyristor rectifier and diode rectifier power supply, it has obvious advantages; Because it can realize the two-way flow of energy, it can also be used as an energy feedback electronic load, which can be used in many industries such as battery aging detection, power aging detection and capacitance aging test, so as to improve production efficiency and achieve the purpose of energy conservation and emission reduction.

Technical specifications: