IGBT (insulated gate bipolar translator) temperature detecting method
A detection method and detection frequency technology, applied to thermometers, thermometers using directly heat-sensitive electric/magnetic elements, measuring devices, etc., can solve problems such as susceptibility to electromagnetic interference, high price, misjudgment, etc., to avoid overheating The effect of burning, low hardware cost, and streamlined steps
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[0015] Example
[0016] Such as figure 1 As shown, the IGBT temperature detection method of this embodiment includes the following steps:
[0017] The first step is to first connect the NTC thermistor to the power supply via a three-terminal regulator, and then use the resistor to divide the voltage in series to make the current through the NTC thermistor basically 4mA; collect the voltage signal on the NTC thermistor;
[0018] In the second step, the V-F conversion unit with conversion chip and peripheral circuit converts the voltage signal into a frequency signal at a ratio of 1V:1KHz;
[0019] The third step, the transmitting unit first converts the frequency signal into an optical signal, and then transmits the optical signal to the receiving unit through the optical fiber;
[0020] The fourth step, the receiving unit first restores the optical signal to a frequency signal, and then transmits the frequency signal to the control unit; the control unit includes a DSP chip TMS320F2812 ...
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