CN102455402A - Rectifier bridge detector - Google Patents
Rectifier bridge detector Download PDFInfo
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- CN102455402A CN102455402A CN2010105301740A CN201010530174A CN102455402A CN 102455402 A CN102455402 A CN 102455402A CN 2010105301740 A CN2010105301740 A CN 2010105301740A CN 201010530174 A CN201010530174 A CN 201010530174A CN 102455402 A CN102455402 A CN 102455402A
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Abstract
The invention provides a rectifier bridge detector. A rectifier bridge comprises at least two rectification branch circuits connected in parallel, a detection unit and a control unit; each rectification branch circuit comprises two diodes connected in series; the detection unit is used for detecting the current flowing through each diode of each rectification branch circuit and detecting the voltage of two ends of each diode of each rectification branch circuit; and the control unit is used for controlling the detection and detection time sequence of the detecting unit. The rectifier bridge detector provided by the invention can be used for detecting the quality state of the rectifier bridge, and is used for evaluating the property of rectifier bridges provided by multiple rectifier bridge manufacturers.
Description
Technical field
The present invention relates to the rectifier bridge of AC generator for vehicle, particularly the rectifier bridge pick-up unit.
Background technology
Generator is the main power supply of automobile, is used for the vehicle-mounted electricity consumption power devices to automobile.According to the classification of output signal, automobile current generator can be divided into Dyn. and alternator.Because the performance of alternator is superior to Dyn., widespread use at present be alternator.Existing generator is a threephase alternator, utilizes in-engine rectifier bridge to convert the alternating current of generator output into direct current, supplies with vehicle-mounted electricity consumption power devices.
In-engine rectifier bridge generally includes 6 commutation diodes; Said 6 commutation diodes press-fit or are welded on two pole plates, the arrangement mode of the commutation diode that existing rectifier bridge is inner can application reference numbers 200910025977.8 Chinese invention patent application.
With reference to figure 1, be the electrical block diagram of existing rectifier bridge.Existing rectifier bridge 10 generally includes the rectification branch road of 3 parallel connections, and each rectification branch road comprises the one or two utmost point 14 pipe and second diodes 15 of series connection, and wherein the negative pole of first diode 14 is connected with the positive electrical of second diode 15, as alternating current input end 13; The positive electrical of first diode 14 of each rectification branch road connects, and the negative electricity of second diode 15 of each rectification branch road connects.First diode 14 of each rectification branch road and second diode, 15 alternate conduction realize the alternating current of input is carried out rectification.The alternating current output terminal 13 of said rectifier bridge 10 is electrically connected with automobile current generator 16, receives the alternating current from generator 16.The negative pole of the positive pole of first diode 14 of each rectification branch road of said rectifier bridge 10 and second diode 15 of each rectification branch road is electrically connected with vehicle-mounted consumer 17, is used for the direct current of rectifier bridge 10 outputs is offered vehicle-mounted consumer 17.
According to actual conditions; Existing rectifier bridge can also comprise 2 booster diodes, is respectively the 3rd diode and the 4th diode, and the negative pole of said the 3rd diode is connected with the positive electrical of the 4th diode; The positive pole of the 3rd diode is parallel to the positive pole of first diode of each rectification branch road; The negative pole of the 4th diode is parallel to the negative pole of second diode of each rectification branch road, and said booster diode is used for the auxiliary rectifier diode operation, improves the reliability of rectifier bridge.
Existing in-engine rectifier bridge utilizes commutation diode conducting and shutoff to carry out rectification, output DC.Because commutation diode needs conducting and shutoff repeatedly, with lasting output DC, thereby the needs of commutation diode bear the impact of WV and working current repeatedly.If it is bad that commutation diode bears the impact capacity of WV and working current repeatedly, then may cause commutation diode to lose efficacy (short circuit or short circuit), thereby rectifier bridge can't work, can't be to vehicle-mounted electricity consumption power devices.
Before rectifier bridge and generator assembling, need guarantee whether the performance of rectifier bridge meets the requirements, i.e. whether the performance of the commutation diode withstand voltage of rectifier bridge impact and rush of current corresponds to actual needs.Because rectifier bridge is to offer generator manufacturing merchant by rectifier bridge manufacturer in the generator, is assembled in generator by generator manufacturing merchant, therefore, needs generator manufacturing merchant that rectifier bridge is tested.
And existing generator manufacturing merchant lacks rectifier bridge pick-up unit and simple and effective detection method, makes the undesirable rectifier bridge of partial properties also be assembled to generator, influences the quality of generator, influences user's use.When facing how tame rectifier bridge supplier, generator manufacturing merchant is not because have rectifier bridge device for detecting performance and simple and effective detection method yet, and the performance of the rectifier bridge that can't provide each rectifier bridge supplier is assessed.
Therefore, need a kind of simple and effective rectifier bridge pick-up unit, can detect the ability that the rectifier bridge withstand voltage is impacted and withstand voltage is impacted.
Summary of the invention
The problem that the present invention solves provides a kind of rectifier bridge pick-up unit, can detect the ability that the rectifier bridge withstand voltage is impacted and withstand voltage is impacted.
For addressing the above problem, the invention provides a kind of rectifier bridge pick-up unit, said rectifier bridge comprises at least two rectification branch roads of parallel connection, each rectification branch road comprises two diodes of series connection, also comprises:
Detecting unit is used to detect the size of each diode current that flows through each rectification branch road and the size that detects each diode voltage of each rectification branch road;
Control module is used for the detection of control detection unit and detects sequential.
Alternatively, said each rectification branch road comprise first diode and second diode, the negative pole of said first diode is connected with the positive electrical of second diode;
Said detecting unit comprises current detecting unit, and the quantity of said current detecting unit is corresponding with the rectification branch road quantity of said rectifier bridge; The corresponding simultaneously electric current that detects first diode that flows through different rectification branch roads of said control module Control current detecting unit; The corresponding simultaneously electric current that detects second diode that flows through different rectification branch roads of said control module Control current detecting unit, said control module Control current detecting unit alternately detects and flows through the electric current of first diode and the electric current of second diode.
Alternatively; Said detecting unit also comprises voltage detection unit; Said voltage detection unit comprises first voltage detection unit, is used to detect the voltage at the first diode two ends of all rectification branch roads, and said voltage detection unit also comprises second voltage detection unit; Be used to detect the voltage at the second diode two ends of all rectification branch roads, said first voltage detection unit is different with second voltage detection unit;
After said current detecting unit detected the electric current step of first diode that flows through different rectification branch roads, said first voltage detection unit detected the voltage at the first diode two ends of different rectification branch roads successively; After said current detecting unit detected the electric current step of second diode that flows through different rectification branch roads, said second voltage detection unit detected the voltage at the second diode two ends of different rectification branch roads successively.
Alternatively, said detecting unit also comprises the first diode selection unit, and said control module is through choosing the detection to all first diodes of the said current detecting unit of the first diode selection unit controls and first voltage detection unit; Said detecting unit also comprises the second diode selection unit, and said control module is through choosing the said current detecting unit of the second diode selection unit controls and second voltage detection unit to all second diode detection.
Alternatively; The said first diode selection unit comprises the first current branch switch and the first main line switch; The quantity of the said first current branch switch is corresponding with the quantity of current detecting unit, and with the corresponding successively series connection of first diode of different current detecting units and different rectification branch roads; The said first main line switch is connected with the positive pole of first diode of all rectification branch roads; The said second diode selection unit comprises the second current branch switch and the second main line switch; The quantity of the said second current branch switch is corresponding with the quantity of current detecting unit, and with the corresponding successively series connection of second diode of different current detecting units and different rectification branch roads; The said second main line switch is connected with the negative pole of second diode of all rectification branch roads.
Alternatively; The said first diode selection unit also comprises the first voltage branch switch; The quantity of the said first voltage branch switch is corresponding with the quantity of the rectification branch road of rectifier bridge; The first all voltage branch switchs all is in series with said first voltage detection unit, and the corresponding parallel connection with first diode in series connection back; The said second diode selection unit comprises the second voltage branch switch; The quantity of the said second voltage branch switch is corresponding with the quantity of the rectification branch road of rectifier bridge; The second all voltage branch switchs all is in series with said second voltage detection unit, and the corresponding parallel connection with second diode in series connection back.
Alternatively, said control module is a programmable logic controller (PLC).
Alternatively, the said first current branch switch and the first main line switch are the normally opened contact of first relay.
Alternatively; The said first relay pack vinculum circle; The coil of said first relay receives first gating signal from programmable logic controller (PLC), and under the control of said first gating signal, the said first current branch switch and the first main line switch are closed simultaneously.
Alternatively, the said second current branch switch and the second main line switch are the normally opened contact of second relay.
Alternatively; The said second relay pack vinculum circle; The coil of said second relay receives second gating signal from programmable logic controller (PLC), and under the control of said second gating signal, the said second current branch switch and the second main line switch are closed simultaneously.
Alternatively; Said detecting unit also comprises direct voltage source; As at the size of each diode current that detects each rectification branch road and the big power supply as a child that detects each diode voltage of each rectification branch road; The voltage of said direct voltage source is greater than the forward voltage of diode, and less than the peak value of alternating current voltage, said alternating current voltage is for putting the voltage of importing when bridge is worked in order.
Compared with prior art; The present invention has the following advantages: through adding detecting unit the size of each diode current of each rectification branch road and the size of each diode voltage are detected; And whether and detect sequential the detection through adding control module control detection unit, and the state when can simulate the rectifier bridge real work like this comprises conduction voltage drop and conducting electric current and conducting number of times; Whether qualified, satisfy actual needs if can accurately test rectifier bridge.
Description of drawings
Fig. 1 is the electrical block diagram of existing rectifier bridge.
Fig. 2 is the rectifier bridge pick-up unit modular structure synoptic diagram of one embodiment of the invention.
Fig. 3 is the modular structure synoptic diagram of the said first diode selection unit of the present invention and the second diode selection unit.
Fig. 4 is the rectifier bridge pick-up unit electrical block diagram of one embodiment of the invention.
Embodiment
The inventor finds that in existing Automotive Industry Chain, the assembling of the manufacturing of diode, the manufacturing of rectifier bridge and generator is to be accomplished by different manufacturers.Diode manufacturer provides diode to rectifier bridge manufacturer, and rectifier bridge manufacturer offers generator manufacturing merchant after diode is assembled into rectifier bridge, by generator manufacturing merchant rectifier bridge and generator is assembled.Generator manufacturing merchant lacks detection rectifier bridge pick-up unit and relevant detection method, makes part rectifier bridge off quality possibly be assembled to engine, influences product quality.Simultaneously, owing to lack the apparatus and method of necessary detection rectifier bridge performance, generator manufacturing merchant can't assess the performance of the rectifier bridge that provides of each rectifier bridge manufacturer.
The present invention provides a kind of pick-up unit of rectifier bridge, and said rectifier bridge comprises at least two rectification branch roads of parallel connection, and each rectification branch road comprises two diodes of series connection, also comprises:
Detecting unit is used to detect the size of each diode current that flows through each rectification branch road and the size that detects each diode voltage of each rectification branch road;
Control module is used for the detection of control detection unit and detects sequential.
To combine specific embodiment that technical scheme of the present invention is carried out detailed explanation below.
Please refer to Fig. 2, be the rectifier bridge pick-up unit modular structure synoptic diagram of one embodiment of the invention.
Said rectifier bridge 10 comprises at least two rectification branch roads of parallel connection, and each rectification branch road comprises two diodes of series connection;
Detecting unit 20 is used for the size of each diode current that flows through each rectification branch road and the size that detects each diode voltage of each rectification branch road;
Particularly, as an embodiment, said rectifier bridge 10 is a three-phase commutation bridge.Said rectifier bridge 10 comprises 3 rectification branch roads of parallel connection; Each rectification branch road comprises first diode 14 and second diode 15; The negative pole of said first diode 14 is connected with the positive electrical of second diode 15; The negative pole of first diode 14 of each rectification branch road is connected with the positive electrical of second diode 15, and as alternating current input end 13, (during rectification) is generally used for importing the alternating current from automobile current generator in when work.
The parallel connection of said rectification branch road is meant that specifically the positive electrical of each rectification branch road first diode 14 of rectifier bridge 10 connects; The negative electricity of second diode 15 of each rectification branch road of rectifier bridge 10 connects.When being applied to the automobile current generator rectification, said 3 rectification branch roads carry out rectification to the alternating current of tackling from automobile current generator respectively, and the principle of rectification does not elaborate at this as those skilled in the art's known technology.
The inventor finds; Because first diode 14 of each rectification branch road of rectifier bridge 10 and second diode 15 be alternate conduction and shutoff when work; When conducting under the situation of rush of current and voltge surge, said first diode 14 and second diode 15 easily since withstand current impact with the abilities of voltge surge inadequately and internal short-circuit or open circuit.Inventor of the present invention proposes; When test; Alternately apply forward voltage at each rectification branch road first diode 14 and second diode, 15 two ends, make win diode 14 and second diode, 15 alternate conduction and shutoff, simulate first diode 14 and second diode, 15 duties.
Therefore; Rectifier bridge pick-up unit of the present invention also comprises control module 30; The alternate conduction situation is carried out the detection of control detection unit and is detected sequential when being used for according to rectifier bridge 10 work, and the state when can simulate the rectifier bridge real work like this comprises conduction voltage drop and conducting electric current and conducting number of times; Whether qualified, satisfy actual needs if can accurately test rectifier bridge.
Said rectifier bridge pick-up unit also comprises direct voltage source 21; Be used at the size of each diode current that detects each rectification branch road and the big power supply as a child that detects each diode voltage of each rectification branch road, the voltage swing of said direct voltage source is 30～60% of an alternating voltage peak.
The situation of the alternating current voltage when particularly, said direct voltage source 21 its magnitudes of voltage are according to rectifier bridge 10 work is provided with.Common said magnitude of voltage should less than the peak value of alternating current voltage, burn out in order to avoid DC voltage is crossed senior general's diode greater than the forward voltage of diode.
As an embodiment, the voltage of direct voltage source 21 can be 30～60% of alternating voltage peak, and for example, the alternating current voltage peak value is 12v, and then the magnitude of voltage of direct voltage source 21 is 4～5v.
Said detecting unit 20 is used to detect each diode current size that flows through each rectification branch road and the size that detects each diode voltage of each rectification branch road.If it is non-vanishing that detecting unit 20 detects the electric current that flows through a certain diode, but the diode voltage is zero, explains that then this diode is short-circuited; If it is zero that detecting unit 20 detects the electric current that flows through a certain diode, but the voltage at diode two ends is supply voltage, explains that this diode opens circuit; The electric current of a certain diode is non-vanishing if detection flows through, and the voltage at diode two ends is non-vanishing, and the state of this diode for normal (can work) just is described.
Said detecting unit 20 comprises current detecting unit 225 and voltage detection unit; The quantity of said current detecting unit 225 is corresponding with the rectification branch road quantity of said rectifier bridge 10, and said current detecting unit 225 is used for detecting respectively first diode 14 that flows through different rectification branch roads and the electric current of second diode 15.Particularly; The corresponding simultaneously electric current that detects first diode 14 that flows through different rectification branch roads of said control module 30 Control current detecting units 225, the corresponding simultaneously electric current that detects second diode 15 that flows through different rectification branch roads of said control module 30 Control current detecting units 225.Said control module 30 Control current detecting units 225 alternately detect and flow through the electric current of first diode 14 and the electric current of second diode 15.
Said voltage detection unit comprises first voltage detection unit 226 and second voltage detection unit 227; Said first voltage detection unit 226 is used to detect first diode, the 14 voltage size that flows through each rectification branch road; Said second voltage detection unit 227 is used to detect second diode, the 15 voltage size that flows through each rectification branch road, and said first voltage detection unit 226 is different with second voltage detection unit 227.
After said current detecting unit 225 detected the electric current step of first diode 14 that flows through different rectification branch roads, said first voltage detection unit 226 detected the voltage at first diode, 14 two ends of different rectification branch roads successively; After said current detecting unit 225 detected the electric current step of second diode 15 that flows through different rectification branch roads, said second voltage detection unit 227 detected the voltage at second diode, 15 two ends of different rectification branch roads successively.
Said detecting unit also comprises the first diode selection unit and the second diode selection unit; The modular structure of the said first diode selection unit and the second diode selection unit is please with reference to Fig. 3, and said control module 30 is through choosing the detection of the first diode selection unit, the 22 said current detecting units 225 of control and first voltage detection unit 226; Said control module 30 is through choosing the detection of the second diode selection unit, the 23 said current detecting units 225 of control and second voltage detection unit 227, and said control module 30 is alternately chosen the first diode selection unit 22 and the second diode selection unit 23.
Further; The said first diode selection unit 22 comprises the first current branch switch 223 and the first main line switch 221; The quantity of the said first current branch switch 223 is corresponding with the quantity of current detecting unit 225, and with the corresponding successively series connection of first diode of different current detecting units 225 and different rectification branch roads; The said first main line switch 221 is connected with the positive pole of first diode of all rectification branch roads; The said second diode selection unit 23 comprises the second current branch switch 224 and the second main line switch 204; The quantity of the said second current branch switch 224 is corresponding with the quantity of current detecting unit 225, and with the corresponding successively series connection of second diode of different current detecting units 225 and different rectification branch roads; The said second main line switch 204 is connected with the negative pole of second diode of all rectification branch roads.
Further; The said first diode selection unit 22 also comprises the first voltage branch switch 231; The quantity of the said first voltage branch switch 231 is corresponding with the quantity of the rectification branch road of rectifier bridge; The first all voltage branch switchs 231 all is in series with the said first voltage detection unit (not shown), and the corresponding parallel connection with said first diode in series connection back; The said second diode selection unit 227 comprises the second voltage branch switch 230; The quantity of the said second voltage branch switch 230 is corresponding with the quantity of the rectification branch road of rectifier bridge; The second all voltage branch switchs 230 all is in series with the said second voltage detection unit (not shown), and the corresponding parallel connection with said second diode in series connection back.
The present invention gives the embodiment of a rectifier bridge pick-up unit electrical block diagram, specifically please with reference to Fig. 4.Comprise:
The rectifier bridge pick-up unit comprises detecting unit 20, control module 30 and direct voltage source 21, simultaneously in order to limit the electric current that flows through diode, usually; Also comprise load; Said load is used for when direct voltage source 21 is connected the formation loop with diode, and the electric current of diode is flow through in restriction, and simulating diode bears the situation of rush of current; Also avoid diode and direct voltage source 21 directly to connect, diode is burnt out.
Said load further comprises first resistance 233 and second resistance 232.Wherein first resistance 233 is used for connecting with first diode 14, direct voltage source 21 and forms the first conducting loop, the said second resistance 232 formation second conducting loop that is used for connect with second diode 15 and direct voltage source 21.
Particularly, said detecting unit 20 comprises current detecting unit 225, and said current detecting unit 225 is a reometer, and the branch road quantity of said rectifier bridge is 3, and therefore, the quantity of current detecting unit 225 is 3.
Said detecting unit 20 also comprises voltage detection unit; Said voltage detection unit comprises first voltage detection unit 226 and second voltage detection unit 227; Said first voltage detection unit 226 and second voltage detection unit 227 are voltage table, and the quantity of said first voltage detection unit 226, second voltage detection unit 227 is 1.
Said detecting unit 20 also comprises the first diode selection unit and the second diode selection unit.The said first diode selection unit comprises the first voltage branch switch 231, the first current branch switch 223 and the first main line switch 221.
Particularly, the said first voltage branch switch 231 is common contactor, when measuring,, is broken off and closed operation according to the measurement needs by the operator.In the present embodiment, the quantity of the branch road of said rectifier bridge is 3, and accordingly, the first voltage branch switch 231 also is 3; The said first current branch switch 223 is a contactor.In the present embodiment, the quantity of the branch road of said rectifier bridge is 3, and therefore, the first current branch switch 223 also is 3; The said first main line switch 221 also is a contactor; The said first current branch switch 223 and the said first main line switch 221 conducting simultaneously or shutoff under the control of control module 30; As the preferred embodiments of the present invention, the said first current branch switch 223 and the first main line switch 221 are the normally opened contact of first relay; As another embodiment of the present invention, the said first current branch switch 223 and the first main line switch 221 can also be transistor.
Wherein, The positive electrical of direct voltage source 21 is connected to an end of the first main line switch 221; The other end of the said first main line switch 221 is electrically connected to the anodal common port 106 of three-phase commutation bridge, the corresponding respectively end that is electrically connected to three current detecting units 225 of three first diode 14 negative poles of said three-phase commutation bridge, the corresponding respectively end that is electrically connected to three first current branch switches 223 of the other end of three current detecting units 225; The other end of three first current branch switches 223 links to each other and forms common port; And being electrically connected to an end of first resistance 233, the other end of first resistance 233 is electrically connected to the negative pole of direct voltage source 21, forms series loop.
One end of said first voltage detection unit 226 is electrically connected to the other end of the said first main line switch 221; One end of said three first voltage branch switchs 231 links to each other and forms common port; And be electrically connected with the other end of said first voltage detection unit 226; The corresponding respectively other end that is electrically connected to three current detecting units 225 of the other end of said three first voltage branch switchs 231 makes voltage table be connected in parallel through three first diodes, 14 formation of three first voltage branch switchs 231 with said three-phase commutation bridge.
The said second diode selection unit comprises the second voltage branch switch 230, the second current branch switch 224 and the second main line switch 204.
Particularly, the said second voltage branch switch 230 is common contactor, when measuring,, is broken off and closed operation according to the measurement needs by the operator.In the present embodiment, the quantity of the branch road of said rectifier bridge is 3, and therefore, the second voltage branch switch 230 also is 3; The second current branch switch 224 is a contactor, and in the present embodiment, the quantity of the branch road of said rectifier bridge is 3, and therefore, the second current branch switch 224 also is 3; The second main line switch 204 also is a contactor; The said second current branch switch 224 and the second main line switch 204 be conducting simultaneously or shutoff under the control of control module 30; As the preferred embodiments of the present invention, the said second current branch switch 224 and the second main line switch 204 are the normally opened contact of second relay; As another embodiment of the present invention, the said second current branch switch 224 and the second main line switch 204 can also be transistor.
Wherein, The negative electricity of direct voltage source 21 is connected to an end of the second main line switch 204; The other end of the said second main line switch 204 is electrically connected to the negative pole common port 105 of three-phase commutation bridge, the corresponding respectively end that is electrically connected to three current detecting units 225 of three second diode 15 positive poles of said three-phase commutation bridge, the corresponding respectively end that is electrically connected to three second current branch switches 224 of the other end of three current detecting units 225; The other end of three second current branch switches 224 links to each other and forms common port; And being electrically connected to an end of second resistance 232, the other end of second resistance 232 is electrically connected to the positive pole of direct voltage source 21, forms series loop.
One end of said second voltage detection unit 227 is electrically connected to the other end of the said second main line switch 204; One end of second said three the voltage branch switch 230 links to each other and forms common port; And be electrically connected with the other end of said second voltage detection unit 227; The corresponding respectively other end that is electrically connected to three current detecting units 225 of the other end of second said three the voltage branch switch 230 makes voltage table pass through three second diodes 15 three second voltage branch switchs 230 and said three-phase commutation bridge and forms and downlink connection.
As an embodiment; Said control module 30 comprises the coil 31 of programmable logic controller (PLC) (PLC), first relay corresponding with the normally opened contact of first relay; The coil 32 of second relay corresponding with the normally opened contact of second relay; Said programmable logic controller (PLC) has first output terminal and second output terminal; Said first output terminal is exported the coil 31 of first gating signal to the first relay, and said second output terminal is exported the coil 32 of second gating signal signal to the second relay, and said first output terminal and second output terminal are alternately exported the coil of first gating signal and second gating signal to the first relay and second relay.When the coil of first relay 31 receives first gating signal from programmable logic controller (PLC) 30, said first current branch switch 223 and the first main line switch, 221 closures.When the coil of second relay 32 receives second gating signal from programmable logic controller (PLC) 30, said second current branch switch 224 and the second main line switch, 204 closures.
For conveniently understanding the present invention; First diode 14 to detect rectifier bridge 10 is that example is done exemplary illustrated, the operator will be manually will be corresponding with first diode 14 of a rectification branch road the said first voltage branch switch, 231 closures, control module 30 sends control signal; By the acceptance of the coil 31 of first relay; The control signal of sending when control module 30 is a gating, and the normally opened contact of first relay is closed, i.e. the first current branch switch 223 and the first main line switch, 221 closures; At this moment; Direct voltage source 21, the first main line switch 221, first diode 14, current detecting unit 225, the first current branch switch 223 and first resistance, 233 formation closed-loop paths, current detecting unit 225 detects the electric current of first diode 14 that flows through, and first voltage detection unit 226 detects and is applied to the voltage on first diode 14; The control signal of sending when control module 30 is when closing, and above-mentioned closed-loop path is broken off, and through the control signal that control module 30 sends, simulates first diode, 14 withstand currents and impacts and voltge surge, and obtain the withstand voltage properties of first diode 14.
With reference to above-mentioned testing process; The present invention can be respectively detects first diode 14 and second diode 15 of three-phase commutation bridge rectification branch road; And in a preferred embodiment of the invention, under the control signal control that control module 30 sends, can realize three-phase commutation bridge rectification branch road first diode 14 and second diode, 15 alternate conduction; When promptly the normally opened contact of first relay was closed, the normally opened contact of second relay broke off; When the normally opened contact of first relay broke off, the normally opened contact of second relay was closed.Simulation three-phase commutation bridge actual working state in automobile current generator, thus confirm whether rectifier bridge is qualified.
Rectifier bridge pick-up unit of the present invention can also be used for the rectifier bridge that how tame rectifier bridge manufacturer provides is assessed.The parameter of the rectifier bridge that usually how tame rectifier bridge manufacturer provides is provided with unanimity, and WV, working current and the serviceable life of promptly giving tacit consent to a plurality of rectifier bridges are identical.Conducting number of times according to first diode that each rectification branch road of rectifier bridge is set said serviceable life and second diode; Confirm that according to the conducting number of times programmable logic controller (PLC) exports the number of times of first gating signal and second gating signal; Test with said number of times, if all rectifier bridge is all qualified, then under the constant situation of other test conditions; Increase the number of times of first gating signal and second gating signal, until selecting a qualified rectifier bridge.
To sum up, rectifier bridge pick-up unit provided by the invention is convenient, simple, satisfies the actual needs that rectifier bridge detects in generator manufacturing merchant and rectifier bridge manufacturing firm, can also be used for the rectifier bridge that rectifier bridge manufacturer provides is assessed, selected.
Though the present invention with preferred embodiment openly as above; But it is not to be used for limiting the present invention; Any those skilled in the art are not breaking away from the spirit and scope of the present invention; Can utilize the method and the technology contents of above-mentioned announcement that technical scheme of the present invention is made possible change and modification, therefore, every content that does not break away from technical scheme of the present invention; To any simple modification, equivalent variations and modification that above embodiment did, all belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (12)
1. rectifier bridge pick-up unit, said rectifier bridge comprise at least two rectification branch roads of parallel connection, and each rectification branch road comprises two diodes of series connection, it is characterized in that, also comprises:
Detecting unit is used to detect the size of each diode current that flows through each rectification branch road and the size that detects each diode voltage of each rectification branch road;
Control module is used for the detection of control detection unit and detects sequential.
2. rectifier bridge pick-up unit according to claim 1 is characterized in that, said each rectification branch road comprise first diode and second diode, the negative pole of said first diode is connected with the positive electrical of second diode;
Said detecting unit comprises current detecting unit, and the quantity of said current detecting unit is corresponding with the rectification branch road quantity of said rectifier bridge; The corresponding simultaneously electric current that detects first diode that flows through different rectification branch roads of said control module Control current detecting unit; The corresponding simultaneously electric current that detects second diode that flows through different rectification branch roads of said control module Control current detecting unit, said control module Control current detecting unit alternately detects and flows through the electric current of first diode and the electric current of second diode.
3. rectifier bridge pick-up unit as claimed in claim 2; It is characterized in that said detecting unit also comprises voltage detection unit, said voltage detection unit comprises first voltage detection unit; Be used to detect the voltage at the first diode two ends of all rectification branch roads; Said voltage detection unit also comprises second voltage detection unit, is used to detect the voltage at the second diode two ends of all rectification branch roads, and said first voltage detection unit is different with second voltage detection unit;
After said current detecting unit detected the electric current step of first diode that flows through different rectification branch roads, said first voltage detection unit detected the voltage at the first diode two ends of different rectification branch roads successively; After said current detecting unit detected the electric current step of second diode that flows through different rectification branch roads, said second voltage detection unit detected the voltage at the second diode two ends of different rectification branch roads successively.
4. rectifier bridge pick-up unit as claimed in claim 3; It is characterized in that; Said detecting unit also comprises the first diode selection unit, and said control module is through choosing the detection to all first diodes of the said current detecting unit of the first diode selection unit controls and first voltage detection unit; Said detecting unit also comprises the second diode selection unit, and said control module is through choosing the said current detecting unit of the second diode selection unit controls and second voltage detection unit to all second diode detection.
5. rectifier bridge pick-up unit as claimed in claim 4; It is characterized in that; The said first diode selection unit comprises the first current branch switch and the first main line switch; The quantity of the said first current branch switch is corresponding with the quantity of current detecting unit, and with the corresponding successively series connection of first diode of different current detecting units and different rectification branch roads; The said first main line switch is connected with the positive pole of first diode of all rectification branch roads; The said second diode selection unit comprises the second current branch switch and the second main line switch; The quantity of the said second current branch switch is corresponding with the quantity of current detecting unit, and with the corresponding successively series connection of second diode of different current detecting units and different rectification branch roads; The said second main line switch is connected with the negative pole of second diode of all rectification branch roads.
6. rectifier bridge pick-up unit as claimed in claim 5; It is characterized in that; The said first diode selection unit also comprises the first voltage branch switch; The quantity of the said first voltage branch switch is corresponding with the quantity of the rectification branch road of rectifier bridge, and the first all voltage branch switchs all is in series with said first voltage detection unit, and the corresponding parallel connection with first diode in series connection back; The said second diode selection unit comprises the second voltage branch switch; The quantity of the said second voltage branch switch is corresponding with the quantity of the rectification branch road of rectifier bridge; The second all voltage branch switchs all is in series with said second voltage detection unit, and the corresponding parallel connection with second diode in series connection back.
7. like the described rectifier bridge pick-up unit of each claim in the claim 1 to 6, it is characterized in that said control module is a programmable logic controller (PLC).
8. rectifier bridge pick-up unit as claimed in claim 7 is characterized in that, the said first current branch switch and the first main line switch are the normally opened contact of first relay.
9. rectifier bridge pick-up unit as claimed in claim 7; It is characterized in that; The said first relay pack vinculum circle; The coil of said first relay receives first gating signal from programmable logic controller (PLC), and under the control of said first gating signal, the said first current branch switch and the first main line switch are closed simultaneously.
10. rectifier bridge pick-up unit as claimed in claim 7 is characterized in that, the said second current branch switch and the second main line switch are the normally opened contact of second relay.
11. rectifier bridge pick-up unit as claimed in claim 7; It is characterized in that; The said second relay pack vinculum circle; The coil of said second relay receives second gating signal from programmable logic controller (PLC), and under the control of said second gating signal, the said second current branch switch and the second main line switch are closed simultaneously.
12. like each described rectifier bridge pick-up unit in claim 1～6 or 8～11; It is characterized in that; Said detecting unit also comprises direct voltage source, and as at the size of each diode current that detects each rectification branch road and the big power supply as a child that detects each diode voltage of each rectification branch road, the voltage of said direct voltage source is greater than the forward voltage of diode; Less than the peak value of alternating current voltage, the voltage of input when said alternating current voltage is worked for the arrangement bridge.
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| CN201010530174.0A CN102455402B (en) | 2010-11-02 | 2010-11-02 | Rectifier bridge detector |
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| CN201010530174.0A CN102455402B (en) | 2010-11-02 | 2010-11-02 | Rectifier bridge detector |
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| CN102455402B CN102455402B (en) | 2014-08-13 |
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| CN102798777A (en) * | 2012-07-31 | 2012-11-28 | 黄山市祁门新飞电子科技发展有限公司 | Test device for three-phase rectification bridge |
| CN103558477A (en) * | 2013-11-12 | 2014-02-05 | 国家电网公司 | Rectifier bridge working condition tester |
| CN105785196A (en) * | 2016-04-22 | 2016-07-20 | 安徽捷迅光电技术有限公司 | Rectifier bridge test tooling |
| CN107411573A (en) * | 2016-05-24 | 2017-12-01 | 佛山市顺德区美的电热电器制造有限公司 | The heating control circuit of electric cooking pot and there is its electric cooking pot |
| CN111983449A (en) * | 2020-07-22 | 2020-11-24 | 西北工业大学 | Fault detection and positioning method for rotating rectifier in power generation stage of three-stage starting/generator |
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| CN111983449A (en) * | 2020-07-22 | 2020-11-24 | 西北工业大学 | Fault detection and positioning method for rotating rectifier in power generation stage of three-stage starting/generator |
| CN111983449B (en) * | 2020-07-22 | 2021-06-11 | 西北工业大学 | Fault detection and positioning method for rotating rectifier in power generation stage of three-stage starting/generator |
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