CN113794382A - Base station power supply - Google Patents

Base station power supply Download PDF

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Publication number
CN113794382A
CN113794382A CN202111101377.2A CN202111101377A CN113794382A CN 113794382 A CN113794382 A CN 113794382A CN 202111101377 A CN202111101377 A CN 202111101377A CN 113794382 A CN113794382 A CN 113794382A
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China
Prior art keywords
control unit
power supply
base station
switching tube
transformer
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Pending
Application number
CN202111101377.2A
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Chinese (zh)
Inventor
金宇星
邱明
丁美林
李�亨
吴典峰
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Lumlux Corp
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Lumlux Corp
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Priority to CN202111101377.2A priority Critical patent/CN113794382A/en
Publication of CN113794382A publication Critical patent/CN113794382A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a base station power supply which is provided with a main control unit and a plurality of shunt control units, wherein the main control unit is respectively connected with the signal end of each shunt control unit; the power input end of the shunt control unit is used for being connected with the output end of the transformer in the base station power supply, and the power output end of the shunt control unit is used for being connected with a load. The base station power supply provided by the embodiment is provided with the main control unit and the plurality of shunt control units, isolation between loads and a transformer and isolation between loads can be realized based on the shunt control units, and when a certain load has a fault, the fault load can be removed from a transformer power supply network through the control of the main control unit on the shunt control unit corresponding to the fault load or based on the shunt control unit, so that the influence of the fault load on the power supply network is avoided, and further the working state of other normal loads is influenced.

Description

Base station power supply
Technical Field
The embodiment of the invention relates to a power supply technology, in particular to a base station power supply.
Background
The base station power supply system is the heart of the communication system, and the stable and reliable base station power supply is used as the key for ensuring the safe and reliable operation of the communication system. When the power supply network of the communication power supply is abnormal, the power supply of the communication equipment is easily interrupted, so that the communication equipment cannot operate, and further, a communication circuit is interrupted, and a communication system is paralyzed, thereby causing great economic and social benefit loss.
With the rapid development and wide application of base station power supplies, the multi-output base station power supply becomes the mainstream of the market, and based on the multi-output base station power supply, a plurality of different equipment terminals can be connected to the base station power supply to work simultaneously.
At present, the multi-output base station power supply cannot realize independent control of each path, and meanwhile, when one path of output is overloaded or damaged, other paths of output can be influenced, so that the abnormality of mobile equipment accessed to the base station power supply is caused.
Disclosure of Invention
The invention provides a base station power supply, which aims to remove a fault load from a transformer power supply network when a certain load has a fault and avoid the fault load from influencing the working state of other normal loads.
The embodiment of the invention provides a base station power supply which is provided with a main control unit and a plurality of shunt control units, wherein the main control unit is respectively connected with the signal end of each shunt control unit;
and the power supply input end of the shunt control unit is used for being connected with the output end of the transformer in the base station power supply, and the power supply output end of the shunt control unit is used for being connected with a load.
Furthermore, a first control switch is also configured, and the first control switch is connected with the control unit;
the control unit is configured to control the operating state of the shunt control unit according to the state of the first control switch.
Furthermore, a plurality of second control switches are also configured;
and the signal output end of the control unit is connected with the signal end of one shunt control unit through one second control switch.
Furthermore, the shunt control unit is provided with an alarm signal output end;
and the alarm signal output end of the shunt control unit is connected with the control unit.
Furthermore, the device also comprises a plurality of diodes, and one diode is used for indicating the alarm state of one shunt control unit.
Further, a PFC controller is also configured, and the PFC controller is connected with the first switching tube;
the first switch tube is configured on the primary coil side of the transformer, and the PFC controller is used for finishing boosting of the input voltage of the transformer by controlling the on-off of the first switch tube.
Furthermore, an LLC controller is also configured, and the LLC controller is connected with the second switching tube and the third switching tube;
the second switching tube and the third switching tube are arranged on the primary coil side of the transformer, and the LLC controller is used for completing the conversion from direct current to alternating current by controlling the on-off of the second switching tube and the third switching tube.
Further, a synchronous rectification controller is also configured, and the synchronous rectification controller is connected with the fourth switching tube and the fifth switching tube;
the synchronous rectification controller is used for completing conversion from alternating current to direct current by controlling on and off of the fourth switching tube and the fifth switching tube.
Furthermore, a filter circuit is also configured, and the filter circuit is used for filtering the input voltage of the transformer.
Further, the shunt control unit comprises a negative hot plug chip;
the positive output end of the transformer is connected with the power input end of the negative hot-plug chip, and the load is connected with the output end of the transformer through the negative hot-plug chip.
Compared with the prior art, the invention has the beneficial effects that: the base station power supply provided by the embodiment is configured with a main control unit and a plurality of shunt control units, wherein an output end of a transformer in the base station power supply is connected with a load through one shunt control unit, isolation between the load and the transformer and isolation between the load and the load can be realized based on the shunt control unit, and when a certain load has a fault, the fault load can be removed from a transformer power supply network through the control of the main control unit on the shunt control unit corresponding to the fault load or based on the shunt control unit, so as to avoid the influence of the fault load on the power supply network, and further influence the working states of other normal loads.
Drawings
FIG. 1 is a schematic diagram of a power supply structure of a base station in an embodiment;
FIG. 2 is a schematic diagram of another power supply configuration of a base station in an embodiment;
FIG. 3 is a schematic diagram of another power supply configuration of a base station in an embodiment;
FIG. 4 is a schematic diagram of a filter circuit according to an embodiment;
fig. 5 is a schematic view of LM5067 in an example.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic diagram of a power supply structure of a base station in an embodiment, and referring to fig. 1, the embodiment provides a power supply of a base station, which is configured with a main control unit 100 and a plurality of branch control units 200-1 to 200-n, wherein the main control unit 100 is connected to a signal terminal GATE of each branch control unit.
And a power supply input end VCC of the shunt control unit is used for being connected with an output end Vout of a transformer in the base station power supply, and a power supply output end OUT of the shunt control unit is used for being connected with a load.
For example, in this embodiment, the main control unit 100 is configured to control the designated shunt control unit to operate based on a manual control command, so that the designated shunt control unit connects or disconnects a power path of a load connected to the designated shunt control unit (a power path between the designated load and the transformer output terminal Vout).
For example, in this embodiment, when it is determined that a fault such as a short circuit or an open circuit occurs in a certain load, a control instruction may be manually input to the main control unit 100, so that the shunt control unit corresponding to the faulty load disconnects the power supply path of the faulty load.
For example, the base station power supply may be configured with a dial switch, the dial switch is configured to generate a manual control instruction, and the control unit is configured to control the operating state of the corresponding shunt control unit according to the state of the dial switch.
In this embodiment, for example, a short-circuit detection circuit and a open-circuit detection circuit may be further configured inside the shunt control unit, where the short-circuit detection circuit is used for detecting a short-circuit fault of the load, and the open-circuit detection circuit is used for detecting an open-circuit fault of the load.
For example, when the shunt control unit is configured with the short-circuit detection circuit and the open-circuit detection circuit, the shunt control unit may also automatically disconnect the power supply path of the load connected thereto when the load fails.
Illustratively, in this embodiment, the shunt control unit is configured with a relay module, and the relay module is used for realizing connection or disconnection of the power supply path.
The base station power supply provided by the embodiment is configured with a main control unit and a plurality of shunt control units, wherein an output end of a transformer in the base station power supply is connected with a load through one shunt control unit, isolation between the load and the transformer and isolation between the load and the load can be realized based on the shunt control unit, and when a certain load has a fault, the fault load can be removed from a transformer power supply network through the control of the main control unit on the shunt control unit corresponding to the fault load or based on the shunt control unit, so as to avoid the influence of the fault load on the power supply network, and further influence the working states of other normal loads.
As an implementation scheme, when the shunt control unit is internally provided with a short circuit detection circuit and a broken circuit detection circuit, the shunt control unit can also be provided with an alarm signal output end.
Fig. 2 is a schematic diagram of another base station power supply structure in the embodiment, and referring to fig. 2, taking a shunt control unit 200-1 as an example, it is configured with an alarm signal output terminal AM, and the alarm signal output terminal AM is connected with the main control unit 100.
For example, when the shunt control unit determines that a load connected to the shunt control unit fails, the shunt control unit sends alarm information to the main control unit 100 through the alarm signal output end AM, and based on the shunt control unit configuration information (the pin address connected to the corresponding alarm signal output end) inside the main control unit 100, the main control unit 100 may determine which load fails, and then generate corresponding failure prompt information.
Example two
Fig. 3 is a schematic structural diagram of another base station power supply in an embodiment, and referring to fig. 3, the base station power supply includes a transformer, and the transformer is configured with a filter circuit 1, a PFC controller 2, an LLC controller 3, and a synchronous rectification controller 3.
Illustratively, the filter circuit 1 is used for filtering the input voltage of the transformer, and as an implementable scheme, the filter circuit 1 adopts an EMI filter circuit which is used for reducing the electromagnetic interference of the power supply of the base station.
For example, the EMI filter circuit may be divided into a first-stage EMI filter circuit and a second-stage EMI filter circuit. The first-stage EMI filter circuit mainly comprises a filter capacitor. The second-level EMI filter circuit mainly comprises a filter capacitor, a common-mode inductor, a differential-mode inductor and a grounding metal cover.
Fig. 4 is a schematic structural diagram of a filter circuit in an embodiment, and as an implementation, the filter circuit includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, and a common mode inductor L1.
The capacitors C1-C4 adopt safety capacitors, and the capacitor C1 and the capacitor C2 are connected between the live line L and the zero line N in parallel and used for filtering differential mode interference;
the capacitor C3 is connected in parallel between the live line L and the ground line, the capacitor C4 is connected in parallel between the ground line and the neutral line N, and the common-mode inductor L1, the capacitor C3 and the capacitor C4 are used for filtering out common-mode interference.
Illustratively, the input end of the filter circuit 1 is used for connecting a power supply (L, N), and the output end of the filter circuit is used for connecting with a diode rectifying circuit.
Illustratively, the PFC controller 2 is connected to a first switching tube Q1. The first switching tube Q1 is disposed on the primary winding side of the transformer.
Referring to fig. 3, for example, the inductor L2, the first switching tube Q1, the diode D5, and the capacitor C10 constitute a PFC circuit, and the PFC controller 2 is configured to complete the stabilization of the input current of the PFC circuit by controlling the on/off of the first switching tube Q1, so as to stabilize the power factor of the base station power supply.
Illustratively, the basic operation principle of the PFC circuit is the same as that of the boost circuit, and referring to fig. 3, when the first switching tube Q1 is turned on, the capacitor C10 and the subsequent circuit are short-circuited, the voltage across the capacitor C10 is unchanged, the diode D5 is equivalently open-circuited, the inductor L2 is charged, and the inductor current rises;
when the first switching tube Q1 is turned on and off, the input power forms a loop with the capacitor C10 through the diode D5, the inductor L2 discharges, the inductor current decreases, and the input power and the inductor L2 charge the capacitor C10 together, so that the output voltage at the two ends of the capacitor C10 is the sum of the PFC voltage and the input voltage;
since the periodic on/off of the first switch Q1 causes the inductor current to periodically rise and fall, the average value of the inductor current (the input current of the PFC circuit) can be controlled to be stabilized at the set value by controlling the first switch Q1.
For example, in this embodiment, the PFC controller 2 may be designed based on a dedicated PFC control chip (e.g., FAN 7527B).
For example, in the present embodiment, the specific form of the PFC control algorithm applied by the PFC controller 2 is not limited. For example, the PFC control algorithm may be a control algorithm based on a peak current control mode, a control algorithm based on an average current control mode.
Illustratively, the basic principle of the peak current control mode is to make the peak envelope of the input current of the PFC circuit follow the voltage waveform of the input power supply, so that the input current is in phase with the input voltage and is approximately sinusoidal, so that the average value of the input current is stabilized at a set value;
specifically, the peak current control mode controls the on/off of the first switching tube Q1 based on the PWM signal, the peak current control mode compares the actual inductor current with the set peak current, when the inductor current rises to the peak current, the PWM signal is inverted to the low level, the first switching tube Q1 is turned off, and at the starting time of the next period of the PWM signal, the PWM signal is inverted to the high level, and the first switching tube Q1 is turned on.
Illustratively, the average current control mode is a dual-loop control, which includes a voltage loop and a current loop, wherein the voltage loop compares a set voltage value with a sampled voltage at the output terminal of the PFC circuit to generate a voltage error, the current loop compares the voltage error with an actual inductor current to generate a current error, and the current error is compared with a sawtooth wave to generate a PWM control signal for controlling the first switch transistor Q1.
Illustratively, the LLC controller 3 is connected to the second switching tube Q2 and the third switching tube Q3, the second switching tube Q2 and the third switching tube Q3 are disposed on the primary winding side of the transformer, and the LLC controller 3 is configured to complete the conversion from dc to ac by controlling the on/off of the second switching tube Q2 and the third switching tube Q3.
Illustratively, an LLC circuit structure generally includes a capacitor CrInductor LrAnd an inductance Lm. Wherein, the capacitor CrAnd an inductance LrAn inductor L connected in series in the power supply loopmIn parallel with the primary winding of the transformer.
Illustratively, in the base station power supply, the second switch Q2, the third switch Q3 and the LLC circuit structure form an LLC resonant half-bridge circuit (the LLC circuit structure is not shown in fig. 3).
Illustratively, in this embodiment, the LLC controller 3 is configured to output a PWM signal with a duty ratio of 50% and a certain frequency, where the PWM signal is used to drive the second switching tube Q2 and the third switching tube Q3 to be turned on and off periodically, so as to reduce the switching loss of the second switching tube Q2 and the third switching tube Q3 while achieving the conversion from dc to ac, so as to improve the efficiency of the base station power supply.
Illustratively, the frequency of the PWM signal output by the LLC controller 3 is dependent on the capacitance CrInductor LrAnd an inductance LmFor example, the frequency of the PWM signal can be designed to be greater than fr，frCan be determined according to the following equation:
Figure BDA0003271052190000081
illustratively, based on the LLC circuit structure, under the control of the set frequency PWM signal, the voltage of the second switching tube Q2 or the third switching tube Q3 drops to zero before being turned on, and remains zero when being turned off, and further, when being turned on and turned off, the voltage and the current of the switching tube have no overlap on the time axis, and the switching loss of the switching tube is reduced.
Illustratively, the synchronous rectification controller 4 is connected with a fourth switching tube Q4 and a fifth switching tube Q5, the fourth switching tube Q4 and the fifth switching tube Q5 are disposed on the secondary coil side of the transformer, and the synchronous rectification controller 4 is configured to complete the conversion from the alternating current to the direct current by controlling the on and off of the fourth switching tube Q4 and the fifth switching tube Q5.
For example, in this embodiment, the synchronous rectification controller 4 may adopt a dedicated synchronous rectification control chip, and the synchronous rectification controller 4 is configured to control the fourth switching tube Q4 and the fifth switching tube Q5 to be turned on or off according to the period of the alternating current.
Specifically, the synchronous rectification controller 4 controls the fourth switching tube Q4 to be turned on and the fifth switching tube Q5 to be turned off in the positive half cycle of the alternating current at the secondary coil side of the transformer; during the negative half period of the alternating current, the synchronous rectification controller 4 controls the fourth switching tube Q4 to be turned off, and the fifth switching tube Q5 to be turned on.
For example, when the synchronous rectification controller 4 controls the fourth switching tube Q4 and the fifth switching tube Q5 to be turned on or off to achieve rectification on the secondary coil side, power loss generated during rectification can be reduced.
Referring to fig. 3, the base station power supply is further provided with a main control unit 100, a shunt control unit 1, a shunt control unit 2, and a shunt control unit 3.
Illustratively, the main control unit 100 is configured with a first control switch 5, and optionally, the first control switch 5 is a dial switch.
For example, in this embodiment, the shunt control unit 1, the shunt control unit 2, and the shunt control unit 3 use negative hot-plug chips, the model of the chip is LM5067, and each shunt control unit is configured with one second control switch and one switch, respectively.
Fig. 5 is a schematic diagram of an LM5067 in an embodiment, and referring to fig. 3 and fig. 5, taking the shunt control unit 1 as an example, the switch 1 is configured as a MOS transistor, the GATE of the MOS transistor is connected to the GATE pin of the LM5067, the negative output terminal of the transformer is connected to the load 1 through the MOS transistor (switch 1), and the positive output terminal of the transformer is connected to the VCC pin of the LM5067 and the load 1;
the main control unit 100 is connected with the shunt control unit 1 through a second control switch 1, specifically, the second control switch 1 adopts a triode, a first end and a second end of the triode are respectively connected with a UVLO/EN pin of the LM5067 and a negative output end of the transformer, the main control unit 100 is configured with a signal output end SD1, and the main control unit 100 is connected with a base electrode of the triode through a signal output end SD 1.
Illustratively, LM5067 is equipped with short circuit detection function, open circuit detection function, undervoltage detection function, and LM5067 can judge automatically whether the load of being connected with it breaks down.
Illustratively, the MOS transistor externally arranged on the LM5067 and the internal circuit thereof constitute a solid-state relay, and when the LM5067 judges that the load connected thereto is out of order, the load can be removed from the power supply network by controlling the MOS transistor.
Illustratively, the main control unit 100 implements remote control for the shunt control unit through the second control switch, and illustratively, the process implementing process control may be:
an operator specifies a load to be connected to or removed from a power supply network by operating a dial switch (a first control switch), and the main control unit 100 determines a shunt control unit to be controlled according to the state of the dial switch;
the main control unit 100 outputs a control instruction through the signal output end to control the specified triode (second control switch) to be switched on or off;
when the state of the triode changes, the potential state of the UVLO/EN pin of the LM5067 changes, and the LM5067 controls the state of an externally configured MOS tube according to the state of the UVLO/EN pin, so that a specified load is connected to or removed from a power supply network.
In the present embodiment, the base station power supply is further configured with a diode D1, a diode D2, and a diode D3.
Taking diode D1 as an example, the anode and cathode of diode D1 are connected to the alarm signal output terminal PSG1 of the shunt control unit 1 and the main control unit 100, respectively.
Illustratively, the alarm signal output PSG1 of the shunt control unit 1 is a PGD pin of the LM 5067.
Illustratively, when the state of the solid-state relay of the LM5067 changes, the electric potential of the output signal of the PGD pin thereof changes, and then the light emitting state of the diode connected thereto is changed, so as to realize the indication for the fault load.
The base station power supply provided by the embodiment is provided with the filter circuit, the PFC controller, the LLC controller and the synchronous rectification controller, the anti-electromagnetic interference capability of the base station power supply can be improved through the filter circuit, the loss of the base station power supply can be reduced through the PFC controller, the LLC controller and the synchronous rectification controller, and the efficiency of the base station power supply is improved;
in addition, the base station power supply provided by this embodiment is configured with a main control unit and a plurality of shunt control units, wherein an output end of a transformer in the base station power supply is connected with a load through one shunt control unit, isolation between the load and the transformer and isolation between the load and the load can be achieved based on the shunt control unit, and when a certain load fails, the faulty load can be removed from a transformer power supply network by controlling the shunt control unit corresponding to the faulty load through the main control unit or based on the shunt control unit itself, so as to avoid the faulty load from affecting the power supply network, and further affecting the working states of other normal loads.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A power supply of a base station is characterized by being provided with a main control unit and a plurality of shunt control units, wherein the main control unit is respectively connected with the signal end of each shunt control unit;
and the power supply input end of the shunt control unit is used for being connected with the output end of the transformer in the base station power supply, and the power supply output end of the shunt control unit is used for being connected with a load.
2. The base station power supply of claim 1 further configured with a first control switch, said first control switch coupled to said control unit;
the control unit is configured to control the operating state of the shunt control unit according to the state of the first control switch.
3. The base station power supply of claim 1 further configured with a plurality of second control switches;
and the signal output end of the control unit is connected with the signal end of one shunt control unit through one second control switch.
4. The base station power supply of claim 1 wherein said shunt control unit is provided with an alarm signal output;
and the alarm signal output end of the shunt control unit is connected with the control unit.
5. The base station power supply of claim 4 further comprising a plurality of diodes, one of said diodes for indicating an alarm state of one of said shunt control units.
6. The base station power supply of claim 1, further configured with a PFC controller, the PFC controller being connected to the first switching tube;
the first switch tube is configured on the primary coil side of the transformer, and the PFC controller is used for finishing boosting of the input voltage of the transformer by controlling the on-off of the first switch tube.
7. The base station power supply of claim 1, further configured with an LLC controller, wherein the LLC controller is connected to the second switch tube and the third switch tube;
the second switching tube and the third switching tube are arranged on the primary coil side of the transformer, and the LLC controller is used for completing the conversion from direct current to alternating current by controlling the on-off of the second switching tube and the third switching tube.
8. The base station power supply of claim 1, further configured with a synchronous rectification controller, wherein the synchronous rectification controller is connected with the fourth switching tube and the fifth switching tube;
the synchronous rectification controller is used for completing conversion from alternating current to direct current by controlling on and off of the fourth switching tube and the fifth switching tube.
9. The base station power supply of claim 1 further configured with a filter circuit for filtering of the input voltage of the transformer.
10. The base station power supply of claim 1 wherein the shunt control unit comprises a negative hot-plug chip;
the positive output end of the transformer is connected with the power input end of the negative hot-plug chip, and the load is connected with the output end of the transformer through the negative hot-plug chip.
CN202111101377.2A 2021-09-18 2021-09-18 Base station power supply Pending CN113794382A (en)

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Application publication date: 20211214