IGBT driving and wave-pushing and current-limiting circuit control method
A technology of wave-by-wave current limiting and circuit control, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as damage to the main power tube, damage to switching devices, etc., to achieve the effect of improving system stability
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Embodiment 1
[0055] Embodiment 1: An IGBT driving and wave-by-wave current limiting circuit control method, such as figure 1 with figure 2 As shown, the specific steps are as follows:
[0056] S1. The current transformer is connected with the IGBT transistor, the current transformer detects the current value of the transformer when the IGBT transistor is turned on, and transmits the collected current value to the wave-by-wave current limiting circuit.
[0057] S2, combine image 3 , The wave-by-wave current-limiting circuit will collect the current value through the amplifying circuit and put it out in a small amplitude ratio. The wave-by-wave current-limiting circuit forms a steamed bun wave after a small amplitude proportional current value is rectified by a diode half bridge. The wave-by-wave current-limiting circuit inputs the steamed bread wave into the comparison circuit. When the peak value of the steamed-bread wave exceeds the reference voltage of the reverse input terminal of the com...
Embodiment 2
[0062] The second embodiment is an IGBT driving and a wave-by-wave current limiting circuit control method. The difference between this embodiment and the first embodiment is that it further includes the following steps:
[0063] S6. The memory of the microprocessor receives the steamed bread wave generated by the wave-by-wave current limiting circuit in real time, and the memory stores the peak value of the steamed bread wave.
[0064] S7. The microprocessor periodically calls the peak value of the steamed bread wave stored in the microprocessor, and the microprocessor selects the peak value of the steamed bread wave as the y-axis and the time as the x-axis to make a waveform diagram. The microprocessor sends the waveform diagram back to the memory for storage, and at the same time deletes the peak value of the steamed bun wave corresponding to the waveform diagram stored in the memory.
[0065] S8. After receiving the self-checking instruction, the microprocessor calls the waveform...
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