CN204424865U - Power distribution equipment - Google Patents
Power distribution equipment Download PDFInfo
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- CN204424865U CN204424865U CN201420685610.5U CN201420685610U CN204424865U CN 204424865 U CN204424865 U CN 204424865U CN 201420685610 U CN201420685610 U CN 201420685610U CN 204424865 U CN204424865 U CN 204424865U
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Abstract
The utility model provides a kind of power distribution equipment, and described power distribution equipment is used for carrying out distribution to the load being electrically connected to positive direct-current bus and negative DC bus by switch.Described power distribution equipment comprises: voltage sampling apparatus, for the supply power voltage between described positive direct-current bus and negative DC bus being converted to corresponding voltage sampling signal; Current sampling device, for being converted to corresponding current sampling signal by the supply current being supplied to described load; Control signal output device, for according to receive described voltage sampling signal and current sampling signal output switch control signal; And switch controlling device, for controlling the state of described switch according to described switch controlling signal.Power distribution equipment of the present utility model quick and precisely can carry out distribution to load, and security reliability is high.
Description
Technical field
The utility model relates to field of power electronics, is specifically related to a kind of power distribution equipment.
Background technology
Electric motor car, as a kind of motor vehicle of zero discharge, will have long-range market prospects.In order to the level making electric motor car reach fuel vehicle in comfortableness and operability, need to increase a series of current consuming apparatus (load).Such as electric brake, air-conditioning, frost removal, DC/AC inverter and DC/DC converter etc.
Because the electricity of the batteries in electric motor car is limited, therefore in the driving process of electric motor car, in order to the electric energy of efficiency utilization batteries, need to distribute the electric energy of batteries.A kind of scheme of electric power of the prior art is connected with the fusible link corresponding with the rated power of load between load and positive direct-current bus, when the power of load consumption exceed rated power, there is short circuit in load or other faults time, fusible link burns thus cuts off the power supply to load, this scheme of electric power function singleness.Another kind of scheme of electric power of the prior art is that the voltage and current on sensing lead judges whether to this load supplying or power-off, but the voltage of electric motor car is higher (being generally 300-900 volt), in process of distributing electricity, easily cause potential safety hazard.
Utility model content
For the problems referred to above, an embodiment of the present utility model provides a kind of power distribution equipment, and described power distribution equipment is used for carrying out distribution to the load being electrically connected to positive direct-current bus and negative DC bus by switch, and described power distribution equipment comprises:
Voltage sampling apparatus, for being converted to corresponding voltage sampling signal by the supply power voltage between described positive direct-current bus and negative DC bus;
Current sampling device, for being converted to corresponding current sampling signal by the supply current being supplied to described load;
Control signal output device, for according to receive described voltage sampling signal and current sampling signal output switch control signal; And
Switch controlling device, for controlling the state of described switch according to described switch controlling signal.
Preferably, described control signal output device comprises:
Weight detector, for described current sampling signal and predetermined current threshold are compared, export Fisrt fault signal when described current sampling signal is greater than described predetermined current threshold, export the first normal signal when described current sampling signal is not more than described predetermined current threshold;
Power detection device, for obtaining the power of described load according to described voltage sampling signal and current sampling signal, export the second fault-signal when the power of described load is greater than predetermined power threshold, export the second normal signal when the power of described load is not more than described predetermined power threshold; And
Fault treating apparatus, the input of described fault treating apparatus is connected to the output of described Weight detector and power detection device, when receive in described Fisrt fault signal and the second fault-signal any one time output switch cut-off signals, the output switch Continuity signal when receiving described first normal signal and the second normal signal.
Preferably, described voltage sampling apparatus comprises:
Voltage measuring apparatus, the input of described voltage measuring apparatus is electrically connected to described positive direct-current bus and negative DC bus, and for exporting the analog voltage signal corresponding with described supply power voltage, the amplitude of described analog voltage signal is less than the amplitude of described supply power voltage;
Analog voltage signal regulating circuit, for being converted to voltage sampling signal by the described analog voltage signal received.
Preferably, described voltage sampling apparatus also comprises the voltage filtering circuit be connected electrically between described voltage measuring apparatus and analog voltage signal regulating circuit, for filtering the high-frequency noise in described analog voltage signal.
Preferably, described current sampling device comprises:
Current measuring device, for described supply current is converted to analog current signal, the amplitude of described analog current signal is less than the amplitude of described supply current; And
Analog current signal regulating circuit, for being converted to current sampling signal by the described analog current signal received.
Preferably, described current sampling device also comprises the current filtering circuit be connected electrically between described current measuring device and analog current signal regulating circuit, for filtering the high-frequency noise in described analog current signal.
Preferably, described power distribution equipment also comprises:
On off state measurement mechanism, for measuring the state of described switch and output switch status signal; And
Switch fault checkout gear, for receiving described switch state signal and switch controlling signal and comparing, when described switch state signal and switch controlling signal inconsistent time, then output switch fault-signal.
Preferably, described power distribution equipment also comprises electric arc detecting device, for judging the arc stiffness between described positive direct-current bus and negative DC bus based on electric arc diagnosis algorithm, and export the arc stiffness signal corresponding with described arc stiffness to described fault treating apparatus, described fault treating apparatus receives output switch Continuity signal when described first normal signal, the second normal signal and described arc stiffness signal are less than predetermined arc stiffness threshold value, otherwise described fault treating apparatus output switch cut-off signals.
Preferably, described power distribution equipment also comprises signal transmitting apparatus, for controlling the state of described switch according to the external control signal received.
Preferably, described power distribution equipment also comprises charge switch, current limiting device, electric capacity, the first discharge switch and the second discharge switch, one end of described first discharge switch and the electrical connection of second discharge switch one end form node, the other end of described first discharge switch is electrically connected to the positive level of described electric capacity, the other end of described second discharge switch is electrically connected to the negative pole of described electric capacity and described negative DC bus, and described charge switch and described current limiting device are connected to after connecting between the positive pole of described node and described electric capacity.
Power distribution equipment of the present utility model can realize fast to load distribution, and power distribution equipment can not bring potential safety hazard.
Accompanying drawing explanation
Referring to accompanying drawing, the utility model embodiment is described further, wherein:
Fig. 1 is the circuit diagram of the power distribution equipment of present pre-ferred embodiments.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, the utility model is further described by specific embodiment below in conjunction with accompanying drawing.
Fig. 1 is the circuit diagram of the power distribution equipment of present pre-ferred embodiments.As shown in Figure 1, power distribution equipment 100 comprises voltage sampling apparatus 20, current sampling device 30, control signal output device 40, switch controlling device 50, on off state measurement mechanism 61, switch fault checkout gear 62, precharge and electric discharge device 70.Load 80 is electrically connected on positive direct-current bus 11 and negative DC bus 12 by precharge and electric discharge device 70, switch S 1.
Voltage sampling apparatus 20 comprises voltage measuring apparatus 21, voltage filtering circuit 22 and analog voltage signal regulating circuit 23.The input of voltage measuring apparatus 21 is connected on positive direct-current bus 11 and negative DC bus 12, for measuring the supply power voltage between positive direct-current bus 11 and negative DC bus 12, and exports the analog voltage signal corresponding with supply power voltage.Wherein the amplitude of this analog voltage signal is less than or much smaller than the amplitude of supply power voltage, the amplitude of such as analog voltage signal, for being less than 12 volts, can making whole power distribution equipment can not cause electric shock to human body like this, avoid the potential safety hazard that high-tension electricity brings.The input of voltage filtering circuit 22 is electrically connected to the output of voltage measuring apparatus 21, for filtering the noise in the analog voltage signal received, those skilled in the art is known, the frequency of the noise in analog voltage signal is usually higher, and low pass filter therefore can be selected to filter the high-frequency noise in analog voltage signal.The input of analog voltage signal regulating circuit 23 is electrically connected to the output of voltage filtering circuit 22, for the analog voltage signal of filter away high frequency noise being converted to corresponding voltage sampling signal, and is supplied to control signal output device 40.According to the voltage magnitude that control signal output device 40 can receive, voltage sampling signal can be such as a magnitude of voltage between 0 ~ 3 volt or 1 ~ 5 volt.
Current sampling device 30 comprises current measuring device 31, current filtering circuit 32 and analog current signal regulating circuit 33.Current measuring device 31 for measuring the supply current in the wire between positive direct-current bus 11 and an input of load 80, and exports the analog current signal corresponding with this supply current.Wherein the amplitude of analog current signal is less than the amplitude of supply current.The input of current filtering circuit 32 is electrically connected to the output of current measuring device 31, for filtering the noise in the analog current signal received, according to the frequency range of actual current noise, low pass filter can be selected equally to filter the high-frequency noise in analog current signal.The input of analog current signal regulating circuit 33 is electrically connected to the output of current filtering circuit 32, for the analog current signal of filter away high frequency noise being converted to corresponding current sampling signal, and is supplied to control signal output device 40.According to the amplitude of the electric current that control signal output device 40 can receive, current sampling signal can be such as a current value between 0 ~ 20 milliampere.
Control signal output device 40 comprises electric arc detecting device 41, Weight detector 42, power-measuring device 43 and fault treating apparatus 44.
Electric arc detecting device 41 receiver voltage sampled signal and current sampling signal, based on electric arc diagnosis algorithm, such as fault electric arc algorithm for pattern recognition, judge the intensity that whether there is electric arc and electric arc between positive direct-current bus 11 and negative DC bus 12, and export an analog quantity corresponding with arc stiffness or digital quantity signal.
Weight detector 42 received current sampled signal, compares current sampling signal and predetermined current threshold, if when current sampling signal is greater than predetermined current threshold, and output loading fault-signal.When current sampling signal is not more than predetermined current threshold, output loading normal signal those skilled in the art is known, and load faulty signal and load normal signal can be analog quantity or digital quantity.Such as can represent load faulty signal with " 0 ", represent load normal signal with " 1 ".
Power-measuring device 43 receiver voltage sampled signal and current sampling signal, obtain the power of load.The power output fault-signal when the power of load is greater than predetermined power threshold, the power output normal signal when the power of load is not more than predetermined power threshold.Those skilled in the art is known, and power failure signal and power normal signal can be analog quantity or digital quantity.Such as can represent power failure signal with " 0 ", represent power normal signal with " 1 ".
The load faulty signal that fault treating apparatus 44 receives arc stiffness signal that electric arc detecting device 41 exports, Weight detector 42 exports or the power failure signal that load normal signal and power-measuring device 43 export or power normal signal.The arc stiffness signal value received when fault treating apparatus 44 is less than predetermined arc stiffness threshold value and receives load normal signal and power normal signal, output switch Continuity signal.Otherwise output switch cut-off signals.
The switch controlling signal that the reception fault treating apparatus 44 of switch controlling device 50 exports, and based on the state of this switch controlling signal control switch S1.Such as, receiving key Continuity signal then control switch S1 conducting; Receiving key cut-off signals then control switch S1 turns off.
The switch state signal of switch S 1 for the on off state (i.e. conducting or shutoff) of sense switch S1, and is sent to switch fault checkout gear 62 by switch state detector 61.The on off state of various ways sense switch S1 can be adopted, such as can according to the voltage and current of switch S 1, or the on off state of the contact spacing sense switch S1 of switch.
The switch state signal that switch fault checkout gear 62 receiving key state measuring device 61 exports and the switch controlling signal that fault treating apparatus 44 sends, and judge whether switch S 1 breaks down.If the switch controlling signal that fault treating apparatus 44 exports is consistent with the switch state signal of switch S 1, detect that switch S 1 does not break down, otherwise assert that switch S 1 breaks down.By the Autonomous test of switch state detector 61 and switch fault checkout gear 62 pairs of switch S1 functions, the safe distribution of power distribution equipment 100 can be ensured, improve electrical safety.
Be connected electrically in precharge between switch S 1 and load 80 and electric discharge device 70 comprises switch S 2, S3, S4, resistance R, inductance L and electric capacity C.Wherein switch S 2 and S3 are connected to form node N1, and the other end of switch S 2 is connected with the positive pole of electric capacity C, and the other end of switch S 3 is connected with the negative pole of electric capacity C and negative DC bus 12, thus switch S 2, S3 and electric capacity C form a discharge loop.Switch S 4, resistance R and inductance L are connected to after connecting successively between the positive pole of node N1 and electric capacity C, thus constitute precharge loop with electric capacity C.In pre-charge process, switch S 1 conducting, switch S 2, S3 disconnect, switch S 4 conducting, thus realize carrying out precharge to electric capacity C.When load 80 quits work, switch S 1 turns off, and switch S 4 turns off, switch S 2, S3 conducting, thus realizes electric capacity C and discharge.By carrying out precharge to electric capacity C, can avoid damaging load 80.After stopping is to load supplying, by discharging to electric capacity C, capacitive load can cause accidental shock by remaining electricity.
Power distribution equipment of the present utility model adopts voltage sampling apparatus 20 and current sampling device 30 can avoid the potential safety hazard brought high-tension electricity control treatment.Adopt control signal output device 40 can the state of quick and precisely control switch S1.In addition, power distribution equipment 100 also has switch S 1 fault self-checking brake, improves security reliability further.Precharge and electric discharge device 70 can protect load and accidental shock danger.
In other embodiments of the invention, power distribution equipment 100 also comprises signal transmitting apparatus, for receiving external control signal, and according to the on off state of this external control signal control switch S1.Wherein external control signal can be supplied to signal transmitting apparatus in several ways.External control signal described here refers to the switch controlling signal being different from power distribution equipment 100 and producing or export.
In other embodiments of this law, other current limiting device can be adopted to replace resistance R and inductance L.Switch S 2 in precharge and electric discharge device 70, S3 and S4 can be relay or various switching transistor.
In other embodiments of the invention, precharge and electric discharge device 70 can not be had.
In other embodiments of the invention, when positive direct-current bus 11 and negative DC bus 12 voltage without or when only there is a small amount of high frequency noise content, voltage filtering circuit 22 can not be had.Wherein, the analog voltage signal that voltage measuring apparatus 21 exports is converted to voltage sampling signal by analog voltage signal regulating circuit 23.
In other embodiments of the invention, can not have current filtering circuit 32, wherein the analog current signal that current measuring device 31 exports is converted to current sampling signal by analog current signal regulating circuit 33.
In other embodiments of the invention, on off state measurement mechanism 61 and switch fault checkout gear 62 can not be had.
Should be understood that the analog voltage signal regulating circuit 23 in power distribution equipment of the present utility model, analog current signal regulating circuit 33, electric arc detecting device 41, Weight detector 42, power detection device 43, fault treating apparatus 44, on off state measurement mechanism 61 and switch fault checkout gear 62 can realize with the example, in hardware of field programmable gate array (FPGA), application-specific integrated circuit (ASIC) (ASIC).
Although the utility model is described by preferred embodiment, but the utility model is not limited to embodiment as described herein, also comprises done various change and change when not departing from the utility model scope.
Claims (10)
1. a power distribution equipment, described power distribution equipment is used for carrying out distribution to the load being electrically connected to positive direct-current bus and negative DC bus by switch, and it is characterized in that, described power distribution equipment comprises:
Voltage sampling apparatus, for being converted to corresponding voltage sampling signal by the supply power voltage between described positive direct-current bus and negative DC bus;
Current sampling device, for being converted to corresponding current sampling signal by the supply current being supplied to described load;
Control signal output device, for according to receive described voltage sampling signal and current sampling signal output switch control signal; And
Switch controlling device, for controlling the state of described switch according to described switch controlling signal.
2. power distribution equipment according to claim 1, is characterized in that, described control signal output device comprises:
Weight detector, for described current sampling signal and predetermined current threshold are compared, export Fisrt fault signal when described current sampling signal is greater than described predetermined current threshold, export the first normal signal when described current sampling signal is not more than described predetermined current threshold;
Power detection device, for obtaining the power of described load according to described voltage sampling signal and current sampling signal, export the second fault-signal when the power of described load is greater than predetermined power threshold, export the second normal signal when the power of described load is not more than described predetermined power threshold; And
Fault treating apparatus, the input of described fault treating apparatus is connected to the output of described Weight detector and power detection device, when receive in described Fisrt fault signal and the second fault-signal any one time output switch cut-off signals, the output switch Continuity signal when receiving described first normal signal and the second normal signal.
3. power distribution equipment according to claim 1, is characterized in that, described voltage sampling apparatus comprises:
Voltage measuring apparatus, the input of described voltage measuring apparatus is electrically connected to described positive direct-current bus and negative DC bus, and for exporting the analog voltage signal corresponding with described supply power voltage, the amplitude of described analog voltage signal is less than the amplitude of described supply power voltage;
Analog voltage signal regulating circuit, for being converted to voltage sampling signal by the described analog voltage signal received.
4. power distribution equipment according to claim 3, it is characterized in that, described voltage sampling apparatus also comprises the voltage filtering circuit be connected electrically between described voltage measuring apparatus and analog voltage signal regulating circuit, for filtering the high-frequency noise in described analog voltage signal.
5. power distribution equipment according to claim 1, is characterized in that, described current sampling device comprises:
Current measuring device, for described supply current is converted to analog current signal, the amplitude of described analog current signal is less than the amplitude of described supply current; And
Analog current signal regulating circuit, for being converted to current sampling signal by the described analog current signal received.
6. power distribution equipment according to claim 5, it is characterized in that, described current sampling device also comprises the current filtering circuit be connected electrically between described current measuring device and analog current signal regulating circuit, for filtering the high-frequency noise in described analog current signal.
7. power distribution equipment according to any one of claim 1 to 6, is characterized in that, described power distribution equipment also comprises:
On off state measurement mechanism, for measuring the state of described switch and output switch status signal; And
Switch fault checkout gear, for receiving described switch state signal and switch controlling signal and comparing, when described switch state signal and switch controlling signal inconsistent time, then output switch fault-signal.
8. power distribution equipment according to claim 2, it is characterized in that, described power distribution equipment also comprises electric arc detecting device, for judging the arc stiffness between described positive direct-current bus and negative DC bus based on electric arc diagnosis algorithm, and export the arc stiffness signal corresponding with described arc stiffness to described fault treating apparatus, described fault treating apparatus receives described first normal signal, second normal signal, and described arc stiffness signal output switch Continuity signal when being less than predetermined arc stiffness threshold value, otherwise described fault treating apparatus output switch cut-off signals.
9. power distribution equipment according to any one of claim 1 to 6, is characterized in that, described power distribution equipment also comprises signal transmitting apparatus, for controlling the state of described switch according to the external control signal received.
10. power distribution equipment according to any one of claim 1 to 6, it is characterized in that, described power distribution equipment also comprises charge switch, current limiting device, electric capacity, first discharge switch and the second discharge switch, one end of described first discharge switch and the electrical connection of second discharge switch one end form node, the other end of described first discharge switch is electrically connected to the positive level of described electric capacity, the other end of described second discharge switch is electrically connected to the negative pole of described electric capacity and described negative DC bus, described charge switch and described current limiting device are connected to after connecting between the positive pole of described node and described electric capacity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420685610.5U CN204424865U (en) | 2014-11-14 | 2014-11-14 | Power distribution equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420685610.5U CN204424865U (en) | 2014-11-14 | 2014-11-14 | Power distribution equipment |
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| CN204424865U true CN204424865U (en) | 2015-06-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253262A (en) * | 2016-08-01 | 2016-12-21 | 合肥燃气集团有限公司 | A kind of natural gas system power distribution equipment and control method |
| CN108599318A (en) * | 2018-05-31 | 2018-09-28 | 上海工程技术大学 | A kind of suicide for electric car charger protects circuit and judges algorithm |
| WO2020052393A1 (en) * | 2018-09-14 | 2020-03-19 | 珠海格力电器股份有限公司 | Charging apparatus and charging system |
-
2014
- 2014-11-14 CN CN201420685610.5U patent/CN204424865U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253262A (en) * | 2016-08-01 | 2016-12-21 | 合肥燃气集团有限公司 | A kind of natural gas system power distribution equipment and control method |
| CN106253262B (en) * | 2016-08-01 | 2018-12-14 | 合肥燃气集团有限公司 | A kind of natural gas system power distribution equipment and control method |
| CN108599318A (en) * | 2018-05-31 | 2018-09-28 | 上海工程技术大学 | A kind of suicide for electric car charger protects circuit and judges algorithm |
| WO2020052393A1 (en) * | 2018-09-14 | 2020-03-19 | 珠海格力电器股份有限公司 | Charging apparatus and charging system |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190614 Address after: Dublin, Ireland Patentee after: Eaton Intelligent Power Co.,Ltd. Address before: Ohio, USA Patentee before: Eaton Corp. |