CN209823657U - ARM-based digital intelligent switching power supply - Google Patents

Abstract

The utility model discloses a digital intelligent switching power supply based on ARM, which is provided with an EMI filtering unit, a switching tube, a PWM chip and a rear-end filtering unit; the input end of the EMI filtering unit inputs commercial power, the EMI filtering unit is used for eliminating electromagnetic interference and radio frequency interference in a power circuit, the output end of the EMI filtering unit is provided with a front-end rectifying unit, the output end of the front-end rectifying unit is provided with a converter, and the output end of the converter is connected with a switch tube. The utility model discloses an utilize ARM control chip to receive the voltage and current information in the power supply circuit in real time, according to predetermined threshold value, send control command and carry out the conversion of different modes for the PWM chip, can realize multiple control and handle for whole power is in safety and stability, high-efficient energy-conserving running state, has realized full digital control to the power main circuit, and output voltage is adjustable, and has improved output voltage's precision.

Description

ARM-based digital intelligent switching power supply

Technical Field

The utility model relates to a switching power supply technical field, more specifically say, the utility model relates to a digital intelligent switching power supply based on ARM.

Background

The digital network intellectualization will lead the innovation of industrial revolution, and the switch power supply is developing towards the direction of high precision, intellectualization and digitalization. The monitoring unit of the intelligent switch takes a microprocessor as a core, is actually independent computer control equipment, can be used as a communication node in a computer communication network, adopts a digital communication technology to form an intelligent communication network of an electric appliance, completes information transmission, and realizes networked management and equipment resource sharing.

Patent application publication No. CN 108011444A's utility model discloses a high frequency intelligence electronic switch power supply is provided with combined floodgate shut, control shut, storage battery, AC distribution system, monitored control system and at least rectifier circuit of the same kind, AC distribution system connects rectifier circuit, and rectifier circuit is connected with combined floodgate shut through output circuit, and combined floodgate shut is connected with control shut, and monitored control system is connected with rectifier circuit, combined floodgate shut, control shut and AC distribution system respectively, rectifier circuit is connected with storage battery, and storage battery still is connected with combined floodgate shut.

However, in actual use, there still exist many disadvantages, for example, in the working process of the switching power supply, the sensing chip inside the switching power supply is interfered by its internal electronic components when acquiring signals, and there are ripples easily in the power supply output process, which affects normal use and cannot provide more intelligent management and control.

Disclosure of Invention

In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a digital intelligent switching power supply based on ARM adjusts the signal of inputing to PWM chip and ARM control chip through setting up the isolator, disconnection process loop in each signal loop, guarantee the normal transmission of signal, the interference that produces in the reduction system operation, the output ripple among the power supply circuit can be eliminated to resistance and the electric capacity of establishing ties in power supply circuit, switching power supply's performance is improved.

In order to achieve the above object, the utility model provides a following technical scheme: a digital intelligent switching power supply based on ARM is provided with an EMI filtering unit, a switching tube, a PWM chip and a rear-end filtering unit; the input end of the EMI filtering unit is used for inputting commercial power, the EMI filtering unit is used for eliminating electromagnetic interference and radio frequency interference in a power circuit, the output end of the EMI filtering unit is provided with a front-end rectifying unit, the output end of the front-end rectifying unit is provided with a converter, and the output end of the converter is connected with a switch tube; the front-end rectifying unit is used for converting the alternating current processed by the EMI filtering unit into direct current, and the switching tube is used for converting the high-voltage direct current output by the converter into square waves; the isolator is further connected with the PWM chip, the connecting end of the PWM chip is provided with a resistor, a capacitor and an AMR control chip, the isolator is used for adjusting signals input into the PWM chip and the ARM control chip, a process loop is disconnected in each signal loop, and the resistor and the capacitor are connected in series in the power circuit and used for eliminating output ripples in the power circuit.

In a preferred embodiment, the output end of the transformer is provided with a rear-end filtering unit, an EMC protection circuit is further connected in series between the rear-end filtering unit and the transformer, the output end of the rear-end filtering unit is provided with a rear-end rectifying unit, and the EMC protection circuit is used for providing current isolation between signal acquisition and signal processing and ensuring normal transmission of signals in the power circuit.

In a preferred embodiment, the output end of the rear-end rectifying unit is further connected to an ARM control chip, and the ARM control chip receives voltage and current information in the power supply circuit and sends a control command to the PWM chip to perform conversion in different modes according to a preset threshold.

In a preferred embodiment, the rear-end rectifying unit is further used for current output, and the number of the capacitors and the number of the resistors are both set to be multiple.

In a preferred embodiment, the switching tube is composed of two main switching tubes and two diodes, the transformer primary side winding and the two main switching tubes are connected in series, and the diodes are used for releasing transformer stored energy to be magnetically reset and clamping the voltage of the main switching tubes.

The utility model discloses a technological effect and advantage:

1. the utility model discloses an utilize ARM control chip to receive the voltage and current information in the power supply circuit in real time, according to predetermined threshold value, send control command and carry out the conversion of different modes for the PWM chip, can realize multiple control and handle for whole power is in safety and stability, high-efficient energy-conserving running state, has realized full digital control to the power main circuit, and output voltage is adjustable, and has improved output voltage's precision.

2. The isolator is arranged to adjust signals input into the PWM chip and the ARM control chip, and a process loop is disconnected in each signal loop, so that normal transmission of the signals is guaranteed, and interference generated in system operation is reduced.

3. The output ripple in the power circuit can be eliminated by setting the resistor and the capacitor which are connected in series in the power circuit, the performance of the switching power supply is improved, the energy is stored by using the two diodes to release the transformer, the voltage of the main switching tube can be clamped, the overhigh voltage stress is avoided, and the safety of the switching power supply is improved.

Drawings

Fig. 1 is a schematic block diagram of the present invention.

The reference signs are: the circuit comprises an EMI filtering unit 1, a switching tube 2, a PWM chip 3, a rear-end filtering unit 4, an ARM control chip 5, a resistor 6, a capacitor 7, an EMC protection circuit 8 and an isolator 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a digital intelligent switch power supply based on ARM as shown in figure 1, which is provided with an EMI filtering unit 1, a switch tube 2, a PWM chip 3 and a rear-end filtering unit 4; the input end of the EMI filtering unit 1 inputs commercial power, the EMI filtering unit 1 is used for eliminating electromagnetic interference and radio frequency interference in a power circuit, the output end of the EMI filtering unit 1 is provided with a front-end rectifying unit, the output end of the front-end rectifying unit is provided with a converter, and the output end of the converter is connected with the switch tube 2; the front-end rectifying unit is used for converting alternating current processed by the EMI filtering unit 1 into direct current, and the switching tube 2 is used for converting high-voltage direct current output by the converter into square waves; the connecting end of the switch tube 2 is provided with an isolator 9 and a transformer, the isolator 9 is further connected with the PWM chip 3, the connecting end of the PWM chip 3 is provided with a resistor 6, a capacitor 7 and an AMR control chip, the isolator 9 is used for adjusting signals input into the PWM chip 3 and the ARM control chip 5, a process loop is disconnected in each signal loop, and the resistor 6 and the capacitor 7 are connected in series in the power circuit and used for eliminating output ripples in the power circuit.

Further, the output of transformer is equipped with rear end filtering unit 4, it has EMC protection circuit 8 still to establish ties between rear end filtering unit 4 and the transformer, the output of rear end filtering unit 4 is equipped with rear end rectifier unit, EMC protection circuit 8 is used for providing current isolation between signal acquisition and signal processing, guarantees the normal transmission of signal among the power supply circuit.

Further, the output end of the rear-end rectifying unit is also connected with an ARM control chip 5, and the ARM control chip 5 receives voltage and current information in the power circuit and sends a control command to the PWM chip 3 to perform conversion in different modes according to a preset threshold value.

Further, the rear-end rectifying unit is also used for current output, and the number of the capacitors 7 and the number of the resistors 6 are both set to be multiple.

Further, the switching tube 2 is composed of two main switching tubes and two diodes, the primary side winding of the transformer is connected in series with the two main switching tubes, and the diodes are used for releasing the stored energy of the transformer to be magnetically reset and clamping the voltage of the main switching tubes.

The utility model discloses the theory of operation:

referring to the attached figure 1 of the specification, when the power supply works, external mains current is input from an EMI filter unit 1, electromagnetic interference and radio frequency interference in the input current are eliminated, alternating current is converted into direct current through a front-end rectifying unit and then transmitted into a converter for processing, a high-voltage direct current output by the converter is converted into square waves through a switch tube 2 and then is regulated through a transformer, a regulated current is processed and output through a rear-end filter unit 4 and a rear-end rectifying unit, an ARM control chip 5 receives voltage and current information in a power circuit in real time in the current transmission process, and sends a control command to a PWM chip 3 for conversion in different modes according to a preset threshold value, so that various monitoring processes can be realized, the whole power supply is in a safe, stable, efficient and energy-saving running state, and full digital control is realized on a main power supply circuit, output voltage is adjustable, and output voltage's precision and stability have been improved, isolator 9 will be inputed to the signal in PWM chip 3 and the ARM control chip 5 and adjust simultaneously, break off the process loop in each signal loop, guarantee the normal transmission of signal, reduce the interference that produces in the system operation, the output ripple among the power supply circuit can be eliminated to resistance 6 and electric capacity 7 of establishing ties in power supply circuit, switching power supply's performance is improved, adopt two diodes release transformer energy storage to reset with magnetism, and can clamp the voltage of main switch pipe, avoid voltage stress too high, switching power supply's security has been improved.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed; secondly, in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to common designs, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other; finally, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a digital intelligent switching power supply based on ARM which characterized in that: the power supply is provided with an EMI filtering unit (1), a switching tube (2), a PWM chip (3) and a rear end filtering unit (4);

the input end of the EMI filtering unit (1) inputs commercial power, the EMI filtering unit (1) is used for eliminating electromagnetic interference and radio frequency interference in a power circuit, the output end of the EMI filtering unit (1) is provided with a front-end rectifying unit, the output end of the front-end rectifying unit is provided with a converter, and the output end of the converter is connected with the switch tube (2);

the front-end rectifying unit is used for converting alternating current processed by the EMI filtering unit (1) into direct current, and the switching tube (2) is used for converting high-voltage direct current output by the converter into square waves;

the link of switch tube (2) is equipped with isolator (9) and transformer, isolator (9) still are connected with PWM chip (3), PWM chip (3) link is equipped with resistance (6), electric capacity (7) and AMR control chip, isolator (9) are used for adjusting the signal of inputing in PWM chip (3) and ARM control chip (5), break off the process loop in each signal loop, resistance (6) and electric capacity (7) are established ties in power supply circuit.

2. The ARM-based digital intelligent switching power supply of claim 1, wherein: the output of transformer is equipped with rear end filtering unit (4), it has EMC protection circuit (8) still to establish ties between rear end filtering unit (4) and the transformer, the output of rear end filtering unit (4) is equipped with rear end rectifier unit, EMC protection circuit (8) are used for providing current isolation between signal acquisition and signal processing, guarantee the normal transmission of power supply circuit intermediate signal.

3. The ARM-based digital intelligent switching power supply of claim 2, wherein: the output end of the rear-end rectifying unit is further connected with an ARM control chip (5), the ARM control chip (5) receives voltage and current information in the power circuit, and sends a control command to the PWM chip (3) to perform conversion in different modes according to a preset threshold value.

4. The ARM-based digital intelligent switching power supply as claimed in claim 3, wherein: the rear end rectifying unit is also used for current output, and the number of the capacitors (7) and the number of the resistors (6) are both set to be multiple.

5. The ARM-based digital intelligent switching power supply as claimed in claim 4, wherein: the transformer is characterized in that the switch tube (2) is composed of two main switch tubes and two diodes, the number of the main switch tubes and the number of the diodes are both two, the primary side winding of the transformer is connected with the two main switch tubes in series, and the diodes are used for releasing the stored energy of the transformer to be magnetically reset and clamping the voltage of the main switch tubes.