Bidirectional DC Test Power Supply for Electric Vehicle Components

Equipment Overview

SNEEV series two-way DC test power supplies adopt high-frequency PWM rectification and two-way DCDC conversion technology, DPGA digital control technology, to achieve high-performance DC high-power output, and have the function of 100% energy feedback to the grid, power factor up to 0.99, accuracy up to 0.1%. Compared with the conventional bidirectional current, the output voltage range is wider, and the full range and high precision output of the full scale can be realized.

With programmable output function, it can be used for many occasions through different empty box software. Mainly used in the research and development and testing of electric vehicles (controllers), electric vehicle powertrain systems, electric vehicle transmission systems, storage systems, chargers, charging stations, and large-capacity battery pack charging and discharging.

This series of power supplies can perform simulation experiments on the input power, output current, overload capacity, withstand voltage, efficiency of the motor, locked-rotor current, maximum speed, overspeed, and power feeding of the electric vehicle motor controller. It can feed back the energy of the back electromotive force in the motor overspeed experiment to the grid in real time to avoid damage to the controller. It is widely used in the new energy automobile industry.

Technical Parameters

Main Features

1. Voltage can reach 800V, single current -1000A~+1000A/power 40~500kW; Grid feedback function: It has both power and load characteristics at the same time. In addition to the performance of high-power DC power supply, it realizes the automatic energy feedback to the grid load function, which is energy-saving Outstanding advantages of reduced consumption and environmental protection;

2. Adopting high frequency PWM rectification and bidirectional DCDC technology, pure digital control, strong function and high reliability;

3. Output accuracy 0.1% F. S;

4. CC, CV, CP three output modes;

5. Pre-charge function;

6. Battery simulation (internal resistance mode) function, which can simulate the output characteristics of lithium batteries, lead-acid batteries, and nickel-metal hydride batteries (optional);

7. Emergency stop function;

8. Waveform editing, storage, and output functions (optional);

9. Multiple protection functions: output under-voltage, phase loss, output over-voltage, IGBT over-heat, IGBT over-current, over-temperature protection, short-circuit current limit protection;

10. Communication and remote-control function: standard RS485, RS232 and CAN (optional).

Application

1. Electric vehicle motor and controller test: conduct simulation experiments on the input power, output current, overload capacity, withstand voltage and motor efficiency, locked-rotor current, speed, and overspeed characteristics of electric vehicle electric controller; electric vehicle drive system, power General undertaking system test.

2. Energy storage inverter test

3. Charging pile test

4. Battery charge and discharge test

5. Motor drive system test

6. Welding machine test