company news about Innovative Analysis of the Speed Regulation Mechanism of Four-quadrant Electric Dynamometer

Innovative Analysis of the Speed Regulation Mechanism of Four-quadrant Electric Dynamometer

1. Dynamic energy management closed-loop control

1) Multimodal sensor fusion

FPGA/ASIC is used to achieve hardware synchronization between the magnetic encoder and MEMS accelerometer, with feedback delay ≤5μs (compliant with IEEE 1588 PTP protocol), pulse triggering to eliminate clock errors, and time alignment accuracy of ±0.1ms.

2) Adaptive PID algorithm

Based on dynamic parameter adjustment using fuzzy logic (Kp 0.1-10, Ti 1-100ms), under ISO 12097-2 test conditions, speed fluctuation is controlled to ±0.03% within the load inertia range of 0.5-50kg·m².

2. Breakthrough in transient control technology

1) Switching from electric to power generation mode

1MHz current sampling and voltage feedforward control (with error ≤0.5%) suppress torque fluctuations, switching time of 8ms (compared to 13ms in traditional solutions), and 800V system voltage tolerance is achieved via Wolfspeed SiC MOSFETs.

2) Zero-speed brake control

1-5kHz adjustable high-frequency pulse vibration (duty ratio 10%-30%) achieves a torque pulsation elimination rate of ≥95% in aviation reverse thrust testing (in compliance with GB/T 18488).

3. System performance indicators

1) The closed-loop control cycle is 50μs, with deviation of synchronization ≤0.005%

2) The overvoltage protection response time is ≤2μs; dual-channel verification ensures a false triggering probability <0.001%