Universal power supply controlled by DC (direct current) electrical appliances and application of universal power supply

Abstract

The invention discloses a universal power supply controlled by DC (direct current) electrical appliances and application of the universal power supply. The universal power supply comprises a rectifying filter circuit E1, an auxiliary power source E2, a voltage balancer E3, a main power source E4, a quasi voltage meter Vm1, an output voltage meter Vm2, a standby circuit M1, an electronic switch M2, a constant-current source M3, a current detector M4, a quasi voltage VG window limiter M6, a short circuit detection and soft start circuit M8, an output voltage monitor M9, a brake voltage follower U4, a socket J1, a plug P1, a voltage stabilizer W and a load LR. An output voltage of the universal power supply is constantly kept uniform with the voltage of the DC electrical appliances, and high voltage resolution, high precision and high stability are realized; the universal power supply has functions of cold self checking and hot self checking and is capable of immediately stopping power supply and displaying when various faults appear, various protection measures are protected, and human errors are avoided; on / off and standby are controlled autonomously, and the voltage of the DC electrical appliances is judged autonomously; convenience in remote control, maintenance and connection and communication with external equipment and networks is achieved; a plug-and-play function is realized, convenience and reliability in use are achieved, and service lives of the electrical appliances are prolonged.

Description

Technical field: [0001] The present invention relates to a kind of DC electrical appliances (DC electrical appliances generally refer to office, study, entertainment, communication equipment, such as notebook computers, printers, game consoles, mobile phones, radios, etc.) applicable to many different types, different voltages and different loads. The used universal power supply belongs to the technical field of power supply equipment. Background technique: [0002] The existing DC power supply or "multi-channel synchronous voltage adapter" has the following disadvantages when used: [0003] 1. At present, DC electrical appliances cannot control the delay, startup, shutdown and waiting of DC power supply. [0004] 2. The existing DC power supply cannot perform pre-energization detection on the DC electrical appliances. When a fault is found, the DC power supply cannot always prevent the DC power supply from supplying power to the DC electrical appliances. The items that the...

AI Technical Summary

Problems solved by technology

[0003] 1. At present, DC electrical appliances cannot control the delay, startup, shutdown and waiting of DC power supply

[0004] 2. The existing DC power supply cannot perform pre-energization detection on the DC electrical appliances. When a fault is found, the DC power supply cannot always prevent the DC power supply from supplying power to the DC electrical appliances. The items that the existing DC power supply cannot perform cold detection on the DC electrical appliances include:

[0009] 3. The existing DC power supply cannot perform continuous thermal detection on the DC electrical appliances after power-on. When the DC power supply and the DC electrical appliances fail, they cannot be found in time and stop the power supply.

[0014] 5. The existing DC power supply cannot display the quasi-voltage VG of the DC electrical appliance at the first time (the moment before the DC electrical appliance is powered on), and then the output voltage Vo will not be displayed when the power is supplied.

[0015] 6. The existing DC power supply voltage will not follow the voltage of the DC electrical appliance E5, and the voltage resolution is poor (taking mobile phone chargers as an example, the output voltage of each charger is fixed, and it is impossible to be exactly the same at 5.00V. There are some differences in the voltage of each charger encountered

For example: a lithium-ion battery is charged at a constant voltage of 4.275V, it is difficult to find several chargers with such precision, and it cannot be guaranteed that the output voltage of all chargers of the same type is consistent, and the accuracy is difficult to achieve)

[0016] 7. The connection circuit between the existing DC power supply and external remote control equipment is complex and costly, with low reliability and precision, and inconvenient for maintenance, detection and remote control

Therefore, when the existing DC power supply is plugged in and pulled out under the condition of power on, the electric spark cannot be eliminated

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