①Controllable rectifier switching regulated power supply: use thyristor as adjustment switch, and supply power from the AC mains grid directly or after being stepped down by a transformer. The output voltage is adjusted by changing the conduction time of the thyristor, so as to achieve the purpose of stabilizing the output voltage.
②Chopping type switching regulated power supply: its input is an unstable DC voltage, changing the on-off ratio of the switching circuit, and obtaining a unidirectional pulsating DC at the output end, which is filtered to obtain a stable DC voltage different from the input voltage.
③Converter type switching regulated power supply: The unstable DC voltage is sent to the inverter to convert it into high-frequency AC power, and then a new DC output voltage is obtained after transformation, rectification and filtering, sampling from the output voltage, and feedback control of the inverter. The operating frequency of the device is adjusted to achieve the purpose of stabilizing the output voltage.
