The invention comprises a temperature collecting module, a controller, a power driving module and a semiconductor refrigerating module which are sequentially connected.

其特征在于，所述的温度采集模块由温度传感器和激励源组成；

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And the Intelligent Power Module (IPM) 7mbp75ra120's characteristic and self-protection function are studied as well, credible and steady driving circuits for IPM have been designed.

另外还研究智能功率模块7mbp75ra120的自保护功能和特点，设计了稳定、可靠的IPM驱动电路。

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The overall hardware design scheme is performed, such as DSP 3. 3V power, voltage and current sampling module, IGBT driving circuit, I/O signal processor, fault detection module and COM circuit etc.

对系统硬件设计的DSP 3．3V电源的获取、电压电流采样模块、IGBT 驱动、一般I／O信号的处理、故障监测和串口通信电路进行了研究分析。

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