示波器在变频空调测试应用1变频空调电控总体框图如下1测试.docVIP

示波器在变频空调测试应用 变频空调电控总体框图如下 测试项目 整流部分 整流输出波形测量 纹波测量 谐波测量 视在功率、有功功率测量 示波器内部控制电源的输出电压、纹波 逆变部分 IGBT损耗测量 驱动脉冲幅度、死区测量 输出电压和电流测量、输出功率测量 IPM模块 SPWM(SVPWM)输出电路 控制部分 接口总线电路 RS232 SPI 整流部分 测试设备: DPO4054示波器+ P5205 因为客户是日本企业，所以他们与日本保持一致，所以功率与功率因数方面测试采用的是HIOKI3169嵌式功率计。 逆变部分 测试设备: DPO4054示波器+ P5205+TCP0030 测试仪器：DPO4054+ P5205差分探头 优点：使用泰克示波器独有的波形有哪些信誉好的足球投注网站功能，可以快速找到长时间范围内同一桥臂上可能存在的驱动脉冲重叠 1, Capture the Hi-sense driver signal duty Waveform Explain: above two duty waveform captured from difference position in one sin waveform cycle. Channel 2 (Blue) is U phase IPM output duty Channel 3 (Purple) is U phase IPM up arm input duty Channel 3 (Purple) is U phase IPM up arm input duty Conclusion: Sometime, IPM output will exact follow input; sometime, IPM output will larger than input duty Observe the whole sin wave cycle, it has only those two case, and has regular. 2, Capture Our demo driver signal duty Waveform Explain: above four duty waveform captured from difference position in one sin waveform cycle. Channel 3 (Purple) is U phase IPM output duty Channel 4 (Green) is U phase IPM up arm input duty Conclusion: Sometime, IPM output will exact follow input; sometime, IPM output will larger than input duty But from bottom two waveform, sometime IPM output will happen distortion 负载与非负载时测试 1, Compare the driver waveform for without compressor and with compressor Waveform Explain: This is Demo waveform without Compressor Channel 2 (Blue) is difference voltage waveform for U-V phase Channel 4 (Green) is IPM input signal waveform for U phase Channel 3 (Purple) is IPM output signal waveform for U phase Waveform Explain: This is Demo waveform with Compressor Channel 1 (yellow) is current waveform for U phase Channel 2 (Blue) is difference voltage waveform for U-V phase Channel 4 (Green) is IPM input signal waveform for U phase Channel 3 (Purple) is IPM output signal waveform for U phase Conclusion: The IPM driver input signal (Channel 4) are both standard waveform, smooth and average for with or wit