CN204809852U - Phase loss protection circuit among high -power switching power supply of three -phase - Google Patents

Phase loss protection circuit among high -power switching power supply of three -phase Download PDF

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Publication number
CN204809852U
CN204809852U CN201520337029.9U CN201520337029U CN204809852U CN 204809852 U CN204809852 U CN 204809852U CN 201520337029 U CN201520337029 U CN 201520337029U CN 204809852 U CN204809852 U CN 204809852U
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China
Prior art keywords
phase
output
module
power supply
switching power
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Expired - Fee Related
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CN201520337029.9U
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Chinese (zh)
Inventor
严为人
胡楚友
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Zhangjiagang Huawei Electronics Co Ltd
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Zhangjiagang Huawei Electronics Co Ltd
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Abstract

The utility model discloses a phase loss protection circuit among high -power switching power supply of three -phase, the exchangeable sampling module of an electric current concatenates respectively on the high -power switching power supply's of three -phase three -phase electricity input line, the input of a voltage comparater module is sent into respectively to the level sampled singal of the exchangeable sampling module output of each electric current, the output of each voltage comparater module is connected with a photoelectric coupling trigger module's input respectively, each photoelectric coupling trigger module's output all with the high -power switching power supply of three -phase in PWM control chip's messenger can be connected by the control end, have arbitrary looks or appoint the two -phase to lack the phase time in three -phase input electricity, the level signal of the voltage comparater module output that is connected with other input lines that lack looks overturns and makes the photoelectric coupling trigger module who corresponds switch on the output low level to two output pins that make PWM control chip do not have PWM signal output, and then reach the purpose of protection switch power.

Description

Open-phase protection circuit in Three-phase high-power Switching Power Supply
Technical field
The utility model relates to resist technology field during three-phase electric power open phase in Three-phase high-power Switching Power Supply.
Background technology
Usually use pwm chip to control in Three-phase high-power Switching Power Supply and drive the normal work of the main circuit be made up of a pair power switch pipe (being generally metal-oxide-semiconductor), pwm chip---there is an enable control end as on the ICE1HS01G chip that Science and Technology Ltd. of Infineon produces, when this enable control end is high level, two normal output pwm signals of output pins energy of pwm chip, a pair power switch pipe in main circuit can normally work, and main circuit normally exports; When this enable control end is low level, two output pins of pwm chip then export without pwm signal, and a pair power switch pipe in main circuit turns off and do not work, main circuit cisco unity malfunction and no-output.In currently used Three-phase high-power Switching Power Supply, generally all open-phase protection circuit is not set; when there is phase shortage or severe three-phase imbalance by external force or internal input circuit failure and other reasons suddenly in three-phase electricity; wherein two-phase or single-phase overwork will be caused, Switching Power Supply damage, even initiation fire will be caused like this and damage personal safety.
Utility model content
The purpose of this utility model is: provide the open-phase protection circuit in the Three-phase high-power Switching Power Supply that can shield during a kind of phase shortage.
For achieving the above object, the utility model have employed following technical scheme.
Open-phase protection circuit in Three-phase high-power Switching Power Supply, be characterized in: in the three-phase electricity input line of Three-phase high-power Switching Power Supply, be connected in series a Current Mutual Inductance sampling module respectively, the level sampled signal of each Current Mutual Inductance sampling module output sends into the input of a voltage comparator module respectively, the output of each voltage comparator module is connected with the input of a photoelectric coupling trigger module respectively, and the output of each photoelectric coupling trigger module is all connected with the enable control end of the pwm chip in Three-phase high-power Switching Power Supply; When three-phase electricity equilibrium input, the low level signal that each voltage comparator module output exports makes each photoelectric coupling trigger module end, thus makes two of pwm chip normal output pwm signals of output pin; When phase arbitrary in three-phase electricity or when appointing two-phase phase shortage, the level signal of the voltage comparator module output be connected with the input line of other non-phase shortage overturns and makes corresponding photoelectric coupling trigger module conducting thus two of pwm chip output pins are exported without pwm signal.
Further; open-phase protection circuit in aforesaid Three-phase high-power Switching Power Supply; wherein; the concrete structure of described Current Mutual Inductance sampling module is: the primary coil of current transformer is series in the input line of three phase mains; a resistance in parallel on the secondary coil of current transformer; and one end of secondary coil is connected with the positive pole of rectifier diode; the negative pole of rectifier diode connects ground connection after a resistance; the other end also ground connection of secondary coil, the negative pole of rectifier diode is the output of Current Mutual Inductance sampling module.
Further; open-phase protection circuit in aforesaid Three-phase high-power Switching Power Supply; wherein; the concrete structure of voltage comparator module is: comprise an operational amplifier; the anti-phase input termination reference level of operational amplifier; the in-phase input end of operational amplifier is connected with the output of Current Mutual Inductance sampling module, and the output of operational amplifier is the output of voltage comparator module.
Further, open-phase protection circuit in aforesaid Three-phase high-power Switching Power Supply, wherein, the concrete structure of photoelectric coupling trigger module is: comprise a NPN type triode and a photoelectrical coupler, the output of voltage comparator module is connected with the base stage of triode, the grounded emitter of triode, the collector electrode of triode is connected with the negative pole of light-emittingdiode in photoelectrical coupler, the positive pole of light-emittingdiode is connected after a resistance and is connect positive source, the grounded emitter of the phototriode in photoelectrical coupler, the output of the current collection of phototriode very photoelectric coupling trigger module, this output is connected with the enable control end of pwm chip.
Further, the open-phase protection circuit in aforesaid Three-phase high-power Switching Power Supply, wherein, phototriode and pwm chip are altogether.
The beneficial effects of the utility model are: when having arbitrary phase in three-phase input electricity or appointing two-phase phase shortage; the level signal of the voltage comparator module output be connected with the input line of other non-phase shortage overturns and makes corresponding photoelectric coupling trigger module conducting; thus two of pwm chip output pins are exported without pwm signal; and then realize main circuit no-output and reach the object of protection switch power supply, thoroughly stop the possibility causing major disaster because of phase shortage.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of the open-phase protection circuit in Three-phase high-power Switching Power Supply described in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model will be further described.
As shown in Figure 1, open-phase protection circuit in Three-phase high-power Switching Power Supply, at the three-phase electricity input line B1 of Three-phase high-power Switching Power Supply, B2 and B3 is connected in series respectively a Current Mutual Inductance sampling module 111, 112 and 113, in actual applications can also at three-phase electricity input line B1, B2 and B3 is connected in series respectively a fuse F1, F2 and F3, each Current Mutual Inductance sampling module 111, the output terminals A 1 of 112 and 113, the level sampled signal of A2 and A3 sends into a voltage comparator module 221 respectively, the input of 222 and 223, each voltage comparator module 221, the output of 222 and 223 respectively with a photoelectric coupling trigger module 331, 332 with 333 input be connected, each photoelectric coupling trigger module 331, 332 with 333 output be all connected with the enable control end FB of the pwm chip U5 in Three-phase high-power Switching Power Supply, in actual applications, the ICE1HS01G chip that Science and Technology Ltd. of Infineon produces can be chosen.When three-phase electricity equilibrium input, the level signal that each voltage comparator module 221,222 and 223 output exports makes each photoelectric coupling trigger module 331,332 and 333 all end, thus makes two of pwm chip U5 normal output pwm signals of output pin HG, LG; When lacking arbitrary phase or scarce two-phase in three-phase electricity, the level signal that the voltage comparator module output be connected with the input line of other non-phase shortage exports overturns and makes corresponding photoelectric coupling trigger module conducting output low level, thus two of pwm chip U5 output pins HG, LG are exported without pwm signal.
In the present embodiment, the concrete structure of described Current Mutual Inductance sampling module 111 is: the primary coil of current transformer L1 is series in an input line B1 of three phase mains, a resistance R1 in parallel on the secondary coil of current transformer L1, and one end of secondary coil is connected with the positive pole of rectifier diode D1, the negative pole of rectifier diode D1 connects ground connection after a resistance R2, the other end also ground connection of secondary coil, the negative pole of rectifier diode D1 is the output terminals A 1 of Current Mutual Inductance sampling module 111.The concrete structure of described Current Mutual Inductance sampling module 112 is: the primary coil of current transformer L2 is series in an input line B2 of three phase mains, a resistance R3 in parallel on the secondary coil of current transformer L2, and one end of secondary coil is connected with the positive pole of rectifier diode D2, the negative pole of rectifier diode D2 connects ground connection after a resistance R4, the other end also ground connection of secondary coil, the negative pole of rectifier diode D2 is the output terminals A 2 of Current Mutual Inductance sampling module 112.The concrete structure of described Current Mutual Inductance sampling module 113 is: the primary coil of current transformer L3 is series in an input line B3 of three phase mains, a resistance R5 in parallel on the secondary coil of current transformer L3, and one end of secondary coil is connected with the positive pole of rectifier diode D3, the negative pole of rectifier diode D3 connects ground connection after a resistance R6, the other end also ground connection of secondary coil, the negative pole of rectifier diode D3 is the output terminals A 3 of Current Mutual Inductance sampling module 113.In actual applications, after Current Mutual Inductance sampling module 111,112 and 113, be also connected with the three phase rectifier filtration module 511 be made up of three-phase commutation bridge BR1, electric capacity C1, C2 and resistance R11, R12.
In the present embodiment, the concrete structure of described voltage comparator module 221 is: comprise an operational amplifier U2A, the anti-phase input termination reference level of operational amplifier U2A, the in-phase input end of operational amplifier U2A is connected with the output terminals A 1 of Current Mutual Inductance sampling module 111, and the output of operational amplifier U2A is the output of voltage comparator module 221.The concrete structure of described voltage comparator module 222 is: comprise an operational amplifier U2B, the anti-phase input termination reference level of operational amplifier U2B, the in-phase input end of operational amplifier U2B is connected with the output terminals A 2 of Current Mutual Inductance sampling module 112, and the output of operational amplifier U2B is the output of voltage comparator module 222.The concrete structure of described voltage comparator module 223 is: comprise an operational amplifier U2C, the anti-phase input termination reference level of operational amplifier U2C, the in-phase input end of operational amplifier U2C is connected with the output terminals A 3 of Current Mutual Inductance sampling module 113, and the output of operational amplifier U2C is the output of voltage comparator module 223.In actual applications, reference level can be provided by the Voltage stabilizing module 411 adopting resistance R8 and adjustable three terminal regulator U4 to form.
In the present embodiment, the concrete structure of described photoelectric coupling trigger module 331 is: comprise an a NPN type triode Q1 and photoelectrical coupler U3A, the output of voltage comparator module 221 is connected with the base stage of triode Q1, the grounded emitter of triode Q1, the collector electrode of triode Q1 is connected with the negative pole of the light-emittingdiode in photoelectrical coupler U3A, the positive pole of light-emittingdiode is connected after a resistance R7 and is connect positive source, the grounded emitter of the phototriode in photoelectrical coupler U3A, the output of the current collection of phototriode very photoelectric coupling trigger module 331, this output is connected with the enable control end FB of pwm chip U5.The concrete structure of described photoelectric coupling trigger module 332 is: comprise an a NPN type triode Q2 and photoelectrical coupler U3B, the output of voltage comparator module 222 is connected with the base stage of triode Q2, the grounded emitter of triode Q2, the collector electrode of triode Q2 is connected with the negative pole of the light-emittingdiode in photoelectrical coupler U3B, the positive pole of light-emittingdiode is connected after a resistance R9 and is connect positive source, the grounded emitter of the phototriode in photoelectrical coupler U3B, the output of the current collection of phototriode very photoelectric coupling trigger module 332, this output is connected with the enable control end FB of pwm chip U5.The concrete structure of described photoelectric coupling trigger module 333 is: comprise an a NPN type triode Q3 and photoelectrical coupler U3C, the output of voltage comparator module 223 is connected with the base stage of triode Q3, the grounded emitter of triode Q3, the collector electrode of triode Q3 is connected with the negative pole of the light-emittingdiode in photoelectrical coupler U3C, the positive pole of light-emittingdiode is connected after a resistance R10 and is connect positive source, the grounded emitter of the phototriode in photoelectrical coupler U3C, the output of the current collection of phototriode very photoelectric coupling trigger module 333, this output is connected with the enable control end FB of pwm chip U5.In addition, in the present embodiment, phototriode and pwm chip U5 are altogether.In actual applications, two output pins HG, LG of pwm chip U5 are connected with and are generally metal-oxide-semiconductor primarily of a pair power switch pipe Q4 and Q5(), the DC-DC inversion module 611 that forms of the components and parts such as driving transformer T1, main transformer T2, resonant capacitance C4, be also connected with the output module 711 be made up of rectifier bridge BR2, filter capacitor C3 and load RL after inversion module 611.
The operation principle of the open-phase protection circuit in Three-phase high-power Switching Power Supply described in the utility model is as follows.
As three-phase electricity B1, during B2 and B3 equilibrium input, each Current Mutual Inductance sampling module 111, 112 is identical with the output potential of 113, now each voltage comparator module 221, operational amplifier U2A in 222 and 223, the in-phase input end voltage of U2B and U2C is all lower than its anti-phase input terminal voltage, make each voltage comparator module 221, the equal output low level of output of 222 and 223, now each photoelectric coupling trigger module 331, triode Q1 in 332 and 333, Q2 and Q3 all ends, make each photoelectric coupling trigger module 331, 332 and 333 all end, thus what make the enable control end FB of pwm chip U5 obtain is high level, two output pin HG of pwm chip U5, LG is the normal output pwm signal of energy just, thus make the DC-DC inversion module 611 in Three-phase high-power Switching Power Supply, output module 711 can normally export.
When lacking any phase in three-phase electricity---such as during B1 phase shortage, the electric current of other two-phase B2 and B3 must be caused to increase, this can make the current potential of Current Mutual Inductance sampling module 112 and 113 output be connected on B2 and B3 raise, thus make the in-phase input end voltage of operational amplifier U2B and U2C in voltage comparator module 222 and 223 respectively higher than its anti-phase input terminal voltage, now the output level of voltage comparator module 222 and 223 overturns and exports high level, make the equal conducting of triode Q2 and Q3 in photoelectric coupling trigger module 332 and 333, make the equal conducting of phototriode in photoelectric coupling trigger module 332 and 333, now the output of photoelectric coupling trigger module 332 and 333 becomes low level, thus what make the enable control end FB of pwm chip U5 obtain is low level, two output pin HG of pwm chip U5, LG just exports without pwm signal, thus make the DC-DC inversion module 611 in Three-phase high-power Switching Power Supply, output module 711 does not work and no-output, finally realize the object of protection switch power supply.
When lacking any two-phase---such as B1 in three-phase electricity, during B2 phase shortage, the electric current of all the other phase B3 must be caused to increase, this can make the current potential of Current Mutual Inductance sampling module 113 output be connected on B3 raise, thus make the in-phase input end voltage of the operational amplifier U2C in voltage comparator module 223 higher than its anti-phase input terminal voltage, now the output level of voltage comparator module 223 overturns and exports high level, make the triode Q3 conducting in photoelectric coupling trigger module 333, make the phototriode conducting in photoelectric coupling trigger module 333, now the output of photoelectric coupling trigger module 333 becomes low level, thus what make the enable control end FB of pwm chip U5 obtain is low level, two output pin HG of pwm chip U5, LG just exports without pwm signal, thus make the DC-DC inversion module 611 in Three-phase high-power Switching Power Supply, output module 711 does not work and no-output, finally realize the object of protection switch power supply.

Claims (5)

1. the open-phase protection circuit in Three-phase high-power Switching Power Supply, it is characterized in that: in the three-phase electricity input line of Three-phase high-power Switching Power Supply, be connected in series a Current Mutual Inductance sampling module respectively, the level sampled signal of each Current Mutual Inductance sampling module output sends into the input of a voltage comparator module respectively, the output of each voltage comparator module is connected with the input of a photoelectric coupling trigger module respectively, and the output of each photoelectric coupling trigger module is all connected with the enable control end of the pwm chip in Three-phase high-power Switching Power Supply; When three-phase electricity equilibrium input, the low level signal that each voltage comparator module output exports makes each photoelectric coupling trigger module end, thus makes two of pwm chip normal output pwm signals of output pin; When phase arbitrary in three-phase electricity or when appointing two-phase phase shortage, the level signal of the voltage comparator module output be connected with the input line of other non-phase shortage overturns and makes corresponding photoelectric coupling trigger module conducting thus two of pwm chip output pins are exported without pwm signal.
2. the open-phase protection circuit in Three-phase high-power Switching Power Supply according to claim 1; it is characterized in that: the concrete structure of described Current Mutual Inductance sampling module is: the primary coil of current transformer is series in the input line of three phase mains; a resistance in parallel on the secondary coil of current transformer; and one end of secondary coil is connected with the positive pole of rectifier diode; the negative pole of rectifier diode connects ground connection after a resistance; the other end also ground connection of secondary coil, the negative pole of rectifier diode is the output of Current Mutual Inductance sampling module.
3. the open-phase protection circuit in Three-phase high-power Switching Power Supply according to claim 1; it is characterized in that: the concrete structure of voltage comparator module is: comprise an operational amplifier; the anti-phase input termination reference level of operational amplifier; the in-phase input end of operational amplifier is connected with the output of Current Mutual Inductance sampling module, and the output of operational amplifier is the output of voltage comparator module.
4. the open-phase protection circuit in Three-phase high-power Switching Power Supply according to claim 1, it is characterized in that: the concrete structure of photoelectric coupling trigger module is: comprise a NPN type triode and a photoelectrical coupler, the output of voltage comparator module is connected with the base stage of triode, the grounded emitter of triode, the collector electrode of triode is connected with the negative pole of light-emittingdiode in photoelectrical coupler, the positive pole of light-emittingdiode is connected after a resistance and is connect positive source, the grounded emitter of the phototriode in photoelectrical coupler, the output of the current collection of phototriode very photoelectric coupling trigger module, this output is connected with the enable control end of pwm chip.
5. the open-phase protection circuit in Three-phase high-power Switching Power Supply according to claim 4, is characterized in that: phototriode and pwm chip are altogether.
CN201520337029.9U 2015-05-25 2015-05-25 Phase loss protection circuit among high -power switching power supply of three -phase Expired - Fee Related CN204809852U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104917152A (en) * 2015-05-25 2015-09-16 张家港市华为电子有限公司 Open-phase protection circuit in three-phase high-power switching power supply
CN106771677A (en) * 2017-01-25 2017-05-31 苏州振湖电炉有限公司 The open-phase protection circuit of induction furnace power supply
CN109038484A (en) * 2018-07-25 2018-12-18 天钥光电(湖北)股份有限公司 Three-phase short of electricity monitoring device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104917152A (en) * 2015-05-25 2015-09-16 张家港市华为电子有限公司 Open-phase protection circuit in three-phase high-power switching power supply
CN106771677A (en) * 2017-01-25 2017-05-31 苏州振湖电炉有限公司 The open-phase protection circuit of induction furnace power supply
CN109038484A (en) * 2018-07-25 2018-12-18 天钥光电(湖北)股份有限公司 Three-phase short of electricity monitoring device
CN109038484B (en) * 2018-07-25 2023-11-21 天钥光电(湖北)股份有限公司 Three-phase power failure monitoring device

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151125

Termination date: 20190525

CF01 Termination of patent right due to non-payment of annual fee