Fan cooling control device and working method thereof
A control device and fan cooling technology, applied in engine control, pump control, circuit devices, etc., can solve the problems of fan cooling control device failure, affecting the operation of the air cooling system, low working reliability, etc., to correct the power factor of the grid , Guarantee the effect of stability and prolong life
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Embodiment l
[0033] Such as figure 1 As shown, a fan cooling control device includes: a temperature detection sensor, a number of fans, and a PLC module connected to the temperature detection sensor and suitable for controlling the operation of a corresponding number of fans and the corresponding speed of the fans according to the external temperature. In the summer when the temperature of the fan is high, the heat generated by the transformer is huge, so when the temperature detected by the sensor reaches 60 degrees Celsius, all the fans are working, and the fan speed can be increased according to the ambient temperature; in winter with a low temperature, due to the ambient temperature Low, so when the calorific value of the transformer is not high, the fan can be turned on less or not, and the rotation speed of the fan can be appropriately reduced.
[0034] Such as figure 2 As shown, the fan cooling control device further includes: a chained SVG control device suitable for power factor...
Embodiment 2
[0071] See Figure 2-4 , on the basis of embodiment 1, the working method of the air-cooled control device includes:
[0072] The working method of the chained SVG control device provided at the three-phase power supply of the control device comprises the following steps:
[0073] A: When an H bridge unit circuit is damaged, the corresponding automatic bypass circuit bypasses the H bridge unit circuit;
[0074] B: On the basis of keeping the sampling period of the sampling circuit unchanged, the pulse width modulation circuit changes the carrier triangular wave phase-shifting SPWM of the one-phase H-bridge power module where the damaged H-bridge unit circuit is located Carrier frequency, to obtain the pulse modulation waveform of the carrier triangular wave phase-shifting SPWM corresponding to the remaining H bridge unit circuit quantity in the phase H bridge power module;
[0075] The working method of the phase-splitting current independent control circuit comprises the fo...
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