How is the temperature of the transformer regulated?

How is the temperature of the transformer regulated?

Transformer is widely used, when the transformer work will produce different temperatures, the temperature is exquisite, too high and too low will affect the operation of the transformer, so we must control the temperature. How is the temperature of the transformer regulated? Let's take a look at the introduction of small series.

With the daily work of the transformer, the temperature is too high for the transformer core, will burn the transformer core. Too low a temperature will cause the transformer's output to display a lower voltage.

The temperature of the transformer control system changes as follows:

1. The whole system of transformer is controlled by a transformer and its PWM signal. All three-phase transformers are connected to a common DC link voltage. For each individual basic unit driver, the driver parallel board is used to realize the parallel connection. Small variations in driver operating time (less than 100ns) are compensated by a small AC output choke (inductance <5μH).

2. All three-phase transformers are running at the same time, but there is a small delay, which can be compensated by an additional AC choke. A symmetrical layout and a positive temperature coefficient of IGBT saturation voltage drop are used to ensure proper load current equalization. Each basic unit of the system is accompanied by an additional correction of the PWM signal.