Application of Power Analyzer in Hybrid Electric Vehicle Testing

With increasingly stringent global requirements for energy conservation and emission reduction, hybrid electric vehicles (HEVs) are becoming a key development direction in the automotive industry due to their high efficiency, energy saving, and environmental friendliness. However, achieving optimal performance from HEVs requires precise testing and analysis, and power analyzers play a crucial role in this process.

Overview of HEV Testing Requirements

The core of a HEV lies in its complex energy management system, which includes multiple key components such as the internal combustion engine, electric motor, battery pack, and DC-DC converter. To ensure that these components work together and achieve optimal efficiency, detailed energy consumption and power conversion efficiency testing are required for the entire vehicle and its components.

For example, in motor and controller testing, controller efficiency η1 = input power/output power and motor efficiency η2 = mechanical power/input power are obtained. The rated efficiency η = η1*η2 is then calculated, and the efficiency assessment is further optimized using the modified formula η = 100NT/9.55EI.

Furthermore, key components such as DC-DC converters and onboard chargers also require a series of rigorous tests, including rated power, peak output power and duration, dynamic response time, control accuracy, and conversion efficiency. These tests require not only high-precision data acquisition but also multi-channel simultaneous measurement capabilities to meet the needs of simultaneously measuring multiple three-phase systems.

Technical Challenges

When it comes to applications with power levels up to 250kW and requiring 500A current sensors, traditional power analyzers often struggle. This is because such applications require not only extremely high measurement accuracy but also the ability to handle high current signals and provide support for at least six channels to monitor multiple key parameters simultaneously. Traditional instruments may have limitations in channel count, current measurement range, or accuracy, making them unable to fully meet the requirements of modern hybrid vehicle testing.

Solution: Ainuo Multi-Channel High-Precision Power Analyzer ANPA3000(F) Series

After a comprehensive evaluation, we found that Ainuo's multi-channel high-precision power analyzer ANPA3000 series fully met or even exceeded the aforementioned specifications.

Flexible Channel Configuration: The ANPA3000(F) supports simultaneous measurement unit configurations of 1 to 6 channels. Users can configure it in various modes, such as 3-phase 3×2, 3-phase 4×2, or 4-phase (DC + 3-phase 3). This flexibility makes it ideal for complex hybrid powertrain testing.

Excellent Measurement Accuracy: Utilizing a high-speed FPGA + ARM processor dual-core architecture and incorporating a 16-bit high-speed, high-precision AD converter, the ANPA3000 achieves a high standard of basic accuracy of 0.05%. Furthermore, its reading accuracy is 0.03% and its range accuracy is 0.05%, ensuring every reading is reliable and accurate.

Powerful Current Sensing Support: The standard single-channel configuration can measure currents up to 30A, but this can be easily expanded to 50A and higher through optional configurations. Furthermore, the ANPA3000 allows for mixing and matching different specifications, meaning it can perfectly adapt to the 500A current sensor required in this example, thus covering a wide range of applications.

Leading Frequency Coverage: The ANPA3000 is capable of handling both DC and AC signals, with a power measurement bandwidth covering DC and 0.5Hz to 1MHz, sufficient to handle a wide range of standard and non-standard sinusoidal loads.

Extensive Harmonic Analysis: Six channels of simultaneous harmonic analysis support harmonic measurement up to the 500th order, while also performing distortion analysis. This feature is handy for studying high-frequency phenomena within hybrid powertrains and their impact on overall efficiency.

Summary

Hybrid electric vehicle (HEV) testing requires precise analysis of energy consumption and power conversion efficiency, involving the coordinated operation of multiple components such as the motor, controller, battery pack, and DC-DC converter. Traditional power analyzers are insufficient in scenarios involving high power (250kW), high current (500A), and multiple channels (≥6). Ainuo ANPA3000 series power analyzers offer flexible 1-6 channel configurations, support multiple measurement modes, and have high precision of 0.03% reading accuracy and 0.05% range accuracy. They are compatible with 500A current sensors. The frequency range covers DC to 1MHz, supports harmonic analysis, meets complex testing needs, and helps optimize HEV performance.