阅读说明：本技术 一种交直流自适应冗余式检修电源中心 (Alternating current-direct current self-adaptive redundant type maintenance power center ) 是由 常建光 何佳明 于 2019-11-27 设计创作，主要内容包括：一种交直流自适应冗余式检修电源中心,包括印制电路基板,其特征在于：所述印制电路基板上装有A冗余单元功能块和B冗余单元功能块以及切换协调电路；所述A冗余单元功能块和B冗余单元功能块均包括用于减小电网高频干扰的抗干扰电路、用于将交流电转换为脉动直流电的交直流自适应电路、用于产生高频电压的高频变压器、用于输出高频矩形波的高压控制器、用于配合控制高频变压器产生高频电压的功率控制电路、用于对输出直流电进行整流滤波的正电源整流滤波回路和负电源整流滤波回路；所述切换协调电路包括用于实现A冗余单元功能块和B冗余单元功能块之间瞬时切换的冗余切换电路、输出防倒灌电路、以及输出升压降压电路。(The utility model provides a redundant formula of alternating current-direct current self-adaptation overhauls power center, includes printed circuit substrate, its characterized in that: the printed circuit board is provided with an A redundant unit function block, a B redundant unit function block and a switching coordination circuit; the redundancy unit functional block A and the redundancy unit functional block B respectively comprise an anti-interference circuit for reducing the high-frequency interference of a power grid, an alternating current-direct current self-adaptive circuit for converting alternating current into pulsating direct current, a high-frequency transformer for generating high-frequency voltage, a high-voltage controller for outputting high-frequency rectangular waves, a power control circuit for cooperatively controlling the high-frequency transformer to generate the high-frequency voltage, a positive power supply rectification filter circuit for performing rectification filtering on the output direct current and a negative power supply rectification filter circuit; the switching coordination circuit comprises a redundancy switching circuit, an output anti-backflow circuit and an output boosting and voltage reducing circuit, wherein the redundancy switching circuit is used for realizing instantaneous switching between the redundancy unit function block A and the redundancy unit function block B.)

1. The utility model provides a redundant formula of alternating current-direct current self-adaptation overhauls power center, includes printed circuit substrate, its characterized in that: and the printed circuit board is provided with an A redundant unit functional block, a B redundant unit functional block and a switching coordination circuit.

2. The AC/DC adaptive redundant overhaul power supply center according to claim 1, wherein: the redundancy unit functional block A and the redundancy unit functional block B respectively comprise an anti-interference circuit for reducing the high-frequency interference of a power grid, an alternating current-direct current self-adaptive circuit for converting alternating current into pulsating direct current, a high-frequency transformer for generating high-frequency voltage, a high-voltage controller for outputting high-frequency rectangular waves, a power control circuit for cooperatively controlling the high-frequency transformer to generate the high-frequency voltage, a positive power supply rectification filter circuit for performing rectification filtering on the output direct current and a negative power supply rectification filter circuit; the input end of the anti-interference circuit is connected with an external input power supply, the input end of the alternating current-direct current self-adaptive circuit is connected with the output end of the anti-interference circuit, the output end of the alternating current-direct current self-adaptive circuit is electrically connected with the high-frequency transformer, the high-frequency transformer is electrically connected with the positive power supply rectifying and filtering loop and the negative power supply rectifying and filtering loop and is electrically connected with the high-voltage controller, and the high-voltage controller is electrically connected with the power control;

the switching coordination circuit comprises a redundancy switching circuit, an output anti-backflow circuit and an output boosting and voltage reducing circuit, wherein the redundancy switching circuit is used for realizing instantaneous switching between the redundancy unit function block A and the redundancy unit function block B; one end of the output step-up and step-down circuit is electrically connected with the output ends of the positive power supply rectification filter circuit and the negative power supply rectification filter circuit, the other end of the output step-up and step-down circuit is connected with the output step-up and step-down circuit, and the output step-up and step-down circuit is electrically connected with the redundancy switching circuit.

3. The AC/DC adaptive redundant overhaul power supply center according to claim 2, wherein: the high-voltage controller is connected with a clamping circuit and a feedback circuit.

4. The AC/DC adaptive redundant overhaul power supply center according to claim 2, wherein: and the high-frequency transformer is connected with a follow current circuit.

5. The AC/DC adaptive redundant overhaul power supply center according to claim 2, wherein: and a work indicating circuit is connected between the positive power supply rectifying and filtering loop and the negative power supply rectifying and filtering loop.

6. The AC/DC adaptive redundant overhaul power supply center according to claim 2, wherein: the common terminal of the high-frequency transformer and the high-voltage controller is grounded through a fourth capacitor CF4 and a fifth capacitor CF5 which are connected in parallel in the same direction.

7. The AC/DC adaptive redundant overhaul power supply center according to claim 2, wherein: the high-voltage controller adopts a power management chip SI9110 Dj.

Technical Field

The invention relates to the technical field of electrical maintenance and repair equipment, in particular to an alternating current-direct current self-adaptive redundant type maintenance power supply center.

Background

In the electric power industry, the maintenance operation to electric instrument and meter is the operation activity that takes the longest time except production operation, and in these maintenance working processes, the convenience, the variety, the few people of reliability concern of electricity-taking are got to the maintenance power consumption, and used power is mostly regarded as interim power, attaches attention inadequately, often causes the on-the-spot unnormal power consumption to get the electricity, leads to the incident and is detected the damage of equipment.

With the popularization of industrial automation and intellectualization, the types of power electronic and instrument and meter equipment for maintenance and repair are various, the respective working voltages are also various, the alternating current and the direct current exist, the direct current is divided into various voltage grades, however, the maintenance of the equipment is realized by on-site maintenance and repair on an application site, and maintenance operators need to continuously replace various maintenance power supply devices to obtain corresponding working power supplies. This mode causes inconvenience in the maintenance work.

In addition, during maintenance, on-site power utilization units are multiple and complicated, the fluctuation of alternating current power utilization voltage is large, the power utilization safety of instruments and test equipment is threatened, for loads needing long-term stable power supply, two independent switch power supplies are adopted for commonly used switch power supplies, then the switch power supplies are bridged into redundant power supply through an outer loop, and then a dual-power switching device mechanism is used for automatic switching.

Disclosure of Invention

The invention mainly aims to provide an alternating current-direct current adaptive redundant type maintenance power supply center which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a redundant formula of alternating current-direct current self-adaptation overhauls power center, includes printed circuit substrate, its characterized in that: and the printed circuit board is provided with an A redundant unit functional block, a B redundant unit functional block and a switching coordination circuit.

Furthermore, the redundancy unit function block A and the redundancy unit function block B respectively comprise an anti-interference circuit for reducing the high-frequency interference of a power grid, an alternating current and direct current self-adaptive circuit for converting alternating current into pulsating direct current, a high-frequency transformer for generating high-frequency voltage, a high-voltage controller for outputting high-frequency rectangular waves, a power control circuit for cooperatively controlling the high-frequency transformer to generate high-frequency voltage, a positive power supply rectification filter circuit and a negative power supply rectification filter circuit for performing rectification filtering on the output direct current; the input end of the anti-interference circuit is connected with an external input power supply, the input end of the alternating current-direct current self-adaptive circuit is connected with the output end of the anti-interference circuit, the output end of the alternating current-direct current self-adaptive circuit is electrically connected with the high-frequency transformer, the high-frequency transformer is electrically connected with the positive power supply rectifying and filtering loop and the negative power supply rectifying and filtering loop and is electrically connected with the high-voltage controller, and the high-voltage controller is electrically connected with the power control; the switching coordination circuit comprises a redundancy switching circuit, an output backflow prevention circuit and an output boosting and voltage reducing circuit, wherein the redundancy switching circuit is used for realizing instantaneous switching between the redundancy unit function block and the redundancy unit function block; one end of the output step-up and step-down circuit is electrically connected with the output ends of the positive power supply rectification filter circuit and the negative power supply rectification filter circuit, the other end of the output step-up and step-down circuit is connected with the output step-up and step-down circuit, and the output step-up and step-down circuit is electrically connected with the redundancy switching circuit.

Furthermore, the high-voltage controller is connected with a clamping circuit and a feedback circuit.

Furthermore, a follow current circuit is connected to the high-frequency transformer.

Furthermore, a work indicating circuit is connected between the positive power supply rectification filter circuit and the negative power supply rectification filter circuit.

Furthermore, the common end of the high-frequency transformer and the high-voltage controller is grounded through a fourth capacitor and a fifth capacitor which are connected in parallel in the same direction.

Further, the high-voltage controller adopts a power management chip SI9110 Dj.

Further, when the redundancy unit a functional block supplies power, an external ac or dc input power passes through a first fuse PF1 in the anti-jamming circuit, then passes through a first inductor LF1, a second inductor LF2, a thirty-first capacitor CF31 and a third inductor LF3 to reduce high-frequency interference from the power grid, an ac is converted into a half-wave by a thirteenth diode DF13 in the ac/dc adaptive circuit, then passes through an eleventh capacitor CF11, a twenty-sixth capacitor CF26 and a twenty-seventh capacitor CF27 to be filtered, and then is converted into a pulsating direct current VINA, when the direct current VINA is sent to the transformer, an auxiliary coil of the transformer generates an induced voltage VIN1, the induced voltage VIN1 is rectified by a fifteenth diode DF15 and a seventh diode DF7, then is filtered by a fourth capacitor CF4 and a fifth capacitor CF5 and then is sent to a power management chip SI9110Dj, at this time, the power management chip controls a field effect transistor ir450B switch in the power control circuit by a rectangular wave output by a high-frequency fp 596, therefore, the high-frequency transformer is controlled to generate high-frequency voltage at the secondary coil, and the high-frequency voltage outputs stable direct current after being rectified and filtered by the positive power supply rectification filter circuit and the negative power supply rectification filter circuit.

Further, the alternating current-direct current self-adaptive circuit can realize automatic identification of alternating current-direct current input and wide voltage automatic adaptation, when an input power supply is alternating current, a thirteenth diode DF13 and a thirtieth capacitor CF30 convert the alternating current into direct current, then a high-voltage controller controls the high-frequency transformer to be switched on and off, then a secondary side of the high-frequency transformer outputs high-frequency pulses, and the high-frequency pulses are rectified, filtered and converted into stable direct current; when direct current is input, the thirteenth diode DF13 and the thirtieth capacitor CF30 function as reverse connection protection, and the control principle at this time is the same as that of alternating current.

Further, the circuit structure and principle of the B redundant unit functional block and the a redundant unit functional block are the same.

Furthermore, the switching coordination circuit monitors the power supply working conditions of the A redundancy unit function block and the B redundancy unit function block in time, when the A redundancy unit function block loses power, the endurance capacitor CF8 of the follow current circuit of the A redundancy unit function block is excited to discharge, so that the A redundancy unit function block can maintain power supply for one to two seconds, and the power supply of the B redundancy unit function block is synchronously switched on in the period, otherwise, the automatic seamless switching of double power supplies can be realized, uninterrupted power supply is realized for a load, and the power supply reliability is improved.

Compared with the prior art, the invention has the following beneficial effects:

1. the power supply input of an alternating current or direct current power supply can be automatically identified and adapted, and the wide voltage ranges are DC 88V-250V and AC120V-230V, so that the working power supply of the switching power supply is limited by low power quality requirements of the working environment, namely the input power supply with large fluctuation can not influence the work of the switching power supply; the dc output is up to 6 voltage levels: the alternating current and direct current hybrid power supply can meet the power consumption requirements of various common working voltages of instruments and meters of industrial electricity or power electricity, can be switched according to needs, cannot be damaged, solves the problem that multiple single switching power supplies are carried to be used, and reduces loss caused by misoperation of maintainers.

2. The redundant inverter power supplies of two sets of independent circuits are combined into the same circuit board, mutual monitoring is carried out for mutual standby, one circuit is powered off or the other circuit is in fault, automatic seamless switching can be achieved under the command of a monitoring program, switching speed is high, uninterrupted power supply can be achieved for loads, and power supply reliability is improved.

3. The fault-tolerant processing of the voltage is realized through a 'rear-mounted' voltage stabilizing filter loop in the fluctuation range of the input voltage, so that the output is stabilized, and the problem of unstable quality of the field power supply in the electrical overhaul environment is solved.

A redundant cell function block and B redundant cell function block

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of the structure of the present invention

FIG. 2 is a schematic circuit diagram of a redundancy unit function block A of the present invention;

FIG. 3 is a schematic circuit diagram of a B redundancy unit functional block in the present invention;

FIG. 4 is a schematic circuit diagram of the anti-jamming circuit of the present invention;

FIG. 5 is a schematic circuit diagram of an AC/DC adaptive circuit according to the present invention;

FIG. 6 is a schematic circuit diagram of the positive power supply rectifying and filtering loop of the present invention;

FIG. 7 is a schematic circuit diagram of a negative power supply rectification filter loop according to the present invention;

FIG. 8 is a circuit schematic of the freewheel circuit of the present invention;

FIG. 9 is a circuit schematic of the operation indicating circuit of the present invention;

FIG. 10 is a circuit schematic of the clamp circuit of the present invention;

FIG. 11 is a circuit schematic of the feedback circuit of the present invention;

FIG. 12 is a circuit schematic of the power control circuit of the present invention;

FIG. 13 is a schematic circuit diagram of a switching coordination circuit of the present invention;

FIG. 14 is a circuit schematic of a redundancy switch circuit of the present invention;

FIG. 15 is a schematic circuit diagram of an output anti-back-flow circuit according to the present invention;

fig. 16 is a schematic circuit diagram of the output step-up/step-down circuit of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.