Figure 4-16 is a waveform at 3000 RPM (200 Hz) under 500-W dyno load. The waveform includes the following display:

• CH1 (Blue): DCBUS voltage
• CH2 (Light Blue): AC Input Voltage
• CH4 (Green): Current of phase U

Figure 4-16 Phase Current and Voltage Waveforms of Motor at 500 W, 200 Hz

Figure 4-17 shows a waveform at 3300 RPM (220 Hz) under 300-W dyno load with field weakening enabled. The motor tested is rated at 3000 RPM (200 Hz) and now works at field-weakening status.

• CH1 (Blue): DCBUS voltage
• CH2 (Light Blue): AC Input Voltage
• CH4 (Green): Current of phase U

Figure 4-17 Field Weakening Test at 300 W, 220 Hz

This board is designed to work at 750 W for a short amount of time (≤ 1 minute), pay attention to rising temperatures. If running the board at high power or for a long time, use an external cooling fan to cool down the heat sink. Figure 4-18 shows the board temperature rising at 500 W, 3000 RPM (200 Hz).

Figure 4-18 Thermal Test Under 220 VAC, 500 W, 200 Hz