Sinrace Power Supply Technology (Shenzhen) Co., Ltd.

After high-power SMPS circuit is to use high-speed control switch to stop conduction and cut-off. The direct current into high frequency switching power transformers stop the transformer should be provided to place the needs of one or more sets of voltage! Into high-frequency switching power transformers reason is the high frequency switching transformer in the efficiency of the circuit is much higher than 50Hz. Switch transformer can do so little, and when the task is not very hot! Capital is very low. If not to become a high-frequency switching power supply 50Hz deliberately no meaning.

SMPS generally can be divided into two kinds of isolated and non-isolated, isolation-type transformer switch certainly, not be definitely isolated.
Principle is the task of switching power supply:

1. Switching power output into DC by the rectifier filter;
2. After a high-frequency PWM (pulse width modulation) signal master switch, the DC will be added to switch on the transformer low-level;
3. Switch induces a high frequency transformer secondary voltage, the rectifier filter supply the load;
4. Affirmed the circuit after the output response of local control circuit to master the PWM duty cycle, the means to reach the output fluctuations.
Switching power supply output current loop common to a class of Ecuador through the things that disturb the online filter power down, but also filter out the power on the grid disturbed;
Opposite in power, the higher the switching frequency, the smaller the size of the transformer switch, but the higher the request of switch;
Switch can have multiple secondary transformer winding or a winding more than one tap, the output needs to lose;
Also deserve to add some general maintenance of the circuit, for example, no-load, short circuit and other maintenance, or SMPS can be burned
Power switching power supply has been widely used in industry initiative of the master, military equipment, research equipment, industrial equipment, communications equipment, electrical equipment, instrumentation, medical equipment, semiconductor refrigeration and heat and other areas.