CN-224204997-U - Dual-frequency multi-output power supply capable of automatically identifying input voltage and frequency

CN224204997UCN 224204997 UCN224204997 UCN 224204997UCN-224204997-U

Abstract

The utility model discloses a double-frequency multi-output power supply capable of automatically identifying input voltage and frequency, which comprises an input voltage automatic selection circuit, a control circuit and a double-frequency output circuit, wherein the input voltage automatic selection circuit is connected with an alternating current input power supply, and the control circuit controls the double-frequency output circuit to output power supplies with different frequencies. The utility model changes the single-phase input power supply into a multi-voltage and dual-frequency output power supply, and can automatically identify the voltage and frequency of the input single-phase power supply so as to realize the dual-frequency and multi-voltage output power supply which better meets the load requirements of single-phase commercial power in all countries of the world.

Inventors

SUN LIJUAN
LI YUAN
WANG FENGGE
ZHAO QIFENG
SHEN XU

Assignees

中原工学院

Dates

Publication Date: 20260505
Application Date: 20250523

Claims (9)

1. The dual-frequency multi-output power supply capable of automatically identifying input voltage and frequency is characterized by comprising an input voltage automatic selection circuit, a control circuit and a dual-frequency output circuit, wherein the input voltage automatic selection circuit is connected with an alternating current input power supply, and the control circuit controls the dual-frequency output circuit to output power supplies with different frequencies; The automatic input voltage selection circuit comprises a relay KF1, a change-over switch SF1 and a transformer TA1, wherein the public end of the change-over switch SF1 is connected with the L1 end of an alternating current input power supply, a first gear of the change-over switch SF1 is connected with a coil of the relay KF1, the other end of the coil of the relay KF1 is connected with the N end of the alternating current input power supply, a movable breaking contact of the relay KF1 is connected between the second gear of the change-over switch SF1 and a primary winding of the transformer TA1, and a movable closing contact of the relay KF1 is connected between the second gear of the change-over switch SF1 and a secondary winding of the transformer TA1 in parallel.
2. The dual-frequency multi-output power supply capable of automatically identifying input voltage and frequency according to claim 1, wherein a voltage indicator PG1 is connected in parallel between the primary winding of the transformer TA1 and the N end of the AC input power supply.
3. The dual-frequency multi-output power supply for automatically identifying input voltage and frequency according to claim 1, wherein a circuit breaker QA01 is connected between the input voltage automatic selection circuit and the L1 end of the alternating current input power supply.
4. The dual-frequency multi-output power supply for automatically identifying input voltage and frequency according to claim 1, wherein the control circuit is connected with the secondary winding of the transformer TA1, and a circuit breaker QA02 is arranged between the secondary winding of the transformer TA1 and the control circuit.
5. The dual-frequency multi-output power supply for automatically recognizing input voltage and frequency according to claim 4, wherein the control circuit comprises a power frequency recognition circuit which comprises an inductor RA1 and a capacitor CA1 which are connected in parallel, and the inductor RA1 and the capacitor CA1 are connected in series with a resistor RA2 and the capacitor CA2 after being connected in parallel.
6. The dual-frequency multiple-output power supply for automatically recognizing an input voltage and frequency according to claim 4, wherein the control circuit comprises a delay confirmation circuit including a delay relay KF4.
7. The dual-frequency multiple-output power supply for automatically recognizing input voltage and frequency according to claim 1, wherein the dual-frequency output circuit comprises two output path units, and power supply frequencies between the output path units are different.
8. The dual-frequency multiple-output power supply for automatically recognizing input voltage and frequency according to claim 7, wherein the output path unit comprises a transformer and a variable frequency power supply module, and the variable frequency power supply module is connected to a primary winding side of the transformer.
9. The dual-frequency multi-output power supply capable of automatically identifying input voltage and frequency according to claim 8, wherein the primary winding of the transformer is formed by connecting at least two sub-windings with the same specification in series, and the secondary winding of the transformer comprises a plurality of independent sub-windings, and the specifications of the sub-windings are different.

Description

Dual-frequency multi-output power supply capable of automatically identifying input voltage and frequency Technical Field The utility model relates to the technical field of power supplies, in particular to a dual-frequency multi-output power supply capable of automatically identifying input voltage and frequency. Background With the progress of society and the development of science and technology, the economic culture communication among countries in the world is continuously enhanced. In the face of natural disasters such as earthquakes and tsunamis, assistance among countries is continuously enhanced, and medical equipment is certainly the most important material. However, the mains supply voltages and frequencies in different countries are not the same and are mainly divided into 220-240V/50Hz and 100-127V/60Hz, so that the problem that the electronic equipment and the medical equipment cannot be commonly used in different countries occurs. The power adapter on the current market can realize few low-voltage adaptations and is used for small-sized electronic products. But for some motor-type devices frequency adaptation is critical. In addition, the medical power supply is safe and reliable to use, and the failure early warning reminds workers of timely maintenance so as to ensure that medical equipment runs smoothly. In order to solve the problems, a resonant circuit and a relay contactor system are adopted to cooperate, a universal dual-frequency multi-output power supply capable of automatically identifying the input power supply voltage and frequency is designed, multiple protection of a power supply system is realized through serial-parallel connection of the primary side and the secondary side of a transformer, and the system is ensured to be safe and reliable in operation. Disclosure of Invention The utility model mainly aims at the problem that a power adapter in the prior art cannot be commonly used among power supplies with different voltages and frequencies, and discloses a dual-frequency multi-output power supply capable of automatically identifying input voltages and frequencies. The utility model aims at realizing the following technical scheme that the automatic input voltage selecting circuit comprises an input voltage automatic selecting circuit, a control circuit and a double-frequency output circuit, wherein the input voltage automatic selecting circuit is connected with an alternating current input power supply, and the control circuit controls the double-frequency output circuit to output power supplies with different frequencies. The utility model changes the single-phase input power supply into a multi-voltage and dual-frequency output power supply, and can automatically identify the voltage and frequency of the input single-phase power supply so as to realize the dual-frequency and multi-voltage output power supply which better meets the load requirements of single-phase commercial power in all countries of the world. Preferably, the automatic input voltage selection circuit comprises a relay KF1, a change-over switch SF1 and a transformer TA1, wherein the public end of the change-over switch SF1 is connected with the L1 end of an alternating current input power supply, the first gear of the change-over switch SF1 is connected with a coil of the relay KF1, the other end of the coil of the relay KF1 is connected with the N end of the alternating current input power supply, a movable break contact of the relay KF1 is connected between the second gear of the change-over switch SF1 and a primary winding of the transformer TA1, and a movable contact of the relay KF1 is connected between the second gear of the change-over switch SF1 and a secondary winding of the transformer TA1 in parallel. The switching switch SF1 is used for controlling whether the circuit is in a working state or not, the relay KF1 carries out voltage identification on the alternating current input power supply, when the voltage of the alternating current input power supply meets the coil action voltage requirement of the relay KF1, the relay KF1 acts to enable the alternating current input power supply to supply power to the transformer TA1 so as to enable the transformer TA1 to work, and if the voltage of the alternating current input power supply does not meet the coil action voltage requirement of the relay KF1, the relay KF1 does not act, the alternating current input power supply bypasses the transformer TA1 and is directly connected with a following control circuit. Preferably, a voltage indicator PG1 is connected in parallel between the primary winding of the transformer TA1 and the N terminal of the ac input power. When the voltage of the alternating current input power supply does not meet the coil action voltage requirement of the relay KF1, the voltage indicator lamp PG1 is turned on, and the transformer TA1 is prompted to participate in the running state. Preferably, a circuit breaker QA01 is also conn