Q:Please elaborate on the specific differences, available examples can be explained, thank you

Charger sub-core and electronic. Specifically charged with. Switching power supply is electronic, used as power supply. The power adapter is sub-core and electronic. Used as a power source.

Q:Why some switch power there are two switch tube? Two transformers, one big and one small series

Because depending on the design requirements, the switching transformer can be oscillating and output a common transformer, or it can be oscillating and outputting two separate transformers. General small switching power supply (such as razor charger, cell phone charger, etc.), are a transformer, and require a higher power (such as computer power), is the two transformers. Switching transformers need to oscillate and output, the two circuits are single transformer transformer single switching power supply; separate use of the two transformer switching power supply. Switching power supply (switch: Power Supply), also known as switching power supply, switching converter, is a high-frequency power conversion device. Its function is a standard voltage, through the different forms of architecture to convert the user to the required voltage or current.

Q:Switching power supply 10A current, relay 5A current will not burn the relay

Switching Power Supply 10A Current is the ability of the switching power supply to provide current, the relay 5A current is allowed to flow through the relay contacts the maximum current. If the load current does not exceed 5A (to keep the safety factor), it will not burn.

Q:Would like to ask the switch power supply in the end is what role?

Switching power supply is the principle of alternating current frequency into DC, and then convert DC into high frequency AC, through the switching transformer, feedback regulator and other processes into the voltage you need, through rectification, filtering, and then converted into DC The process, and MOSFET throughout the process through its continuous opening and closing, so that high-voltage DC into high-frequency AC process.

Q:How to choose the switching power supply frequency?

Since I do not have power, the following is only a personal view Internal: 1: depends on your topology and power level 2: the choice of IC and switch operating frequency and can withstand the thermal upper limit external: 3: circuit other power device frequency range 4: assigned to the various devices Limit the temperature is acceptable, in terms of volume, efficiency, cost, heat, system stability, etc., the parties weigh the next value, then the frequency of the better the common frequency as small, the corresponding magnetic device volume will be relatively large, and Frequency is large, the device is small, but the switch loss, of course, core loss is also large, unacceptable. If there are problems please go to the big bit forum to ask me, if you help the busy also hope to adopt the answer!

Q:High power high frequency switching power supply with what rectifier

Input level with ordinary rectifier can be, the output stage recommended with silicon carbide diodes

Q:What is the industrial switching power supply

Industrial switching power supply refers to the switching power supply used in the industrial field Power can be divided into civil, industrial, military, and even aviation, aerospace Industrial switching power supply meets industrial requirements. For example, civil switching power supply generally require working temperature 0 ~ 70C, the industry is generally required in the -40 ~ 85C, military requirements are -55C can work properly.

Q:I have a 12V3A switching power supply. From 0V to 12V, 2V3V can start. Want to carry out voltage regulation. How to do? If you use the potentiometer to connect the kind of potentiometer. I connected to the permanent magnet three brush motor is the car with the wiper motor, the motor high and low speed adjustment. Originally wiper motor there are two blocks. Richer speed adjustment.

12V3A switching power supply can not change the output voltage by external voltage regulator. Switching power supply PWM control technology using pulse width modulation technology to control the opening and closing of the switch, in order to achieve the stability of the output voltage. Switching power supply during operation, the output voltage changes through the optocoupler device to feedback the signal to the PWM controller, control switch drive signal pulse width, that is, duty cycle, adjust the power switch switch ratio, to achieve stable output voltage purposes. External voltage regulator potentiometer, can not be reliable access to the output signal acquisition and feedback adjustment function, it can not be achieved by an external regulator potentiometer to adjust the switching power supply output voltage.

Q:How to transform the switching power supply, the original AC 220 input into DC 84-100 input output unchanged

It is difficult to change, you can consider the use of ready-made DC-DC converter

Q:What is the basic principle of switching power supply?

The basic principle of switching power supply is: The 220v 50HZ exchange, finishing 300v DC, the switch and the oscillation circuit, so that it becomes 40KHZ or higher frequency square wave voltage, coupled through the high-frequency transformer to the secondary, so that the secondary to get the required voltage The That is, the actual switching power supply, is the high-frequency transformer.