CN105588960B - A kind of AC/DC universal variable voltage intelligent load case and its application - Google Patents
A kind of AC/DC universal variable voltage intelligent load case and its application Download PDFInfo
- Publication number
- CN105588960B CN105588960B CN201610144438.6A CN201610144438A CN105588960B CN 105588960 B CN105588960 B CN 105588960B CN 201610144438 A CN201610144438 A CN 201610144438A CN 105588960 B CN105588960 B CN 105588960B
- Authority
- CN
- China
- Prior art keywords
- load box
- power
- instruction
- buses
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
A kind of AC/DC universal variable voltage intelligent load case, including control unit, 485 buses, power resistor unit, gating unit and protection circuit；The power resistor unit includes multiple power resistor in parallel with gating unit, and described control unit after power resistor parallel connection some or all of in gating unit control power resistor unit by accessing external power supply module；The gating unit includes control relay identical with the power resistor quantity, control relay is connected with the power resistor respectively, the single control relay includes power flow and detects the test side of the control relay closed state, and unit provides the access state of power resistor in order to control for the test side of the closed state；A.C. contactor CN1 and breaker are serially connected in the power flow.The present invention can use in the case of electrification, be controlled by control module, instantaneously be switched to the electric current of needs.
Description
Technical field
The present invention relates to a kind of AC/DC universal variable voltage intelligent load case and its applications, belong to electric and intelligent
The technical field of measurement.
Background technology
High-power tunable load is often used in power supply test field to test the performance of power supply, however it is now the most frequently used
Tunable load be high-power to slide resistance coil with motor-driven.This motor-driven tunable load has disadvantages that：
In motor rotates and drives contact shoe sliding process, spark phenomenon would tend to occur by high current, it is sometimes even on fire；Greatly
The resistance box of power may account for prodigious place；It is possible to block in contact shoe sliding process；This resistance trimming mode, especially
Slowly, a few minutes clock time can possibly even be spent by being transferred to 100% from resistance value 0%.Such that power measurement is not only bothersome but also easy hair
It is raw dangerous.It is typically all for certain specific voltage, such as although present market has the resistance box directly switched and exists
Alternating current 220V..This load box can also input small voltage such as 10V, but its operating current is very small.If ensured
Certain operating current, it is necessary to access very small resistance.But if these low resistances enter high voltage by misconnection, can be burned off
(ensureing that the measure that do not burnt up under big voltage is to reply the power for improving this resistance, but cost can not be born).In short, now not
There are load boxs general under multiple voltage.Allow in this way we be highly desirable to one AC/DC universal of design, in 10-
380V can be used and can be transferred to the variable voltage intelligent load case of bigger electric current.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of AC/DC universal variable voltage intelligent load case.
The present invention also provides a kind of working methods of above-mentioned load box.
Technical scheme is as follows：
A kind of AC/DC universal variable voltage intelligent load case, including control unit, 485 buses, power resistor unit, choosing
Logical unit and protection circuit；The power resistor unit includes multiple power resistor in parallel with gating unit, and the control is single
Member after power resistor parallel connection some or all of in gating unit control power resistor unit by accessing external power supply module；
The gating unit includes control relay identical with the power resistor quantity, control relay respectively with
The power resistor is connected, and the single control relay includes power flow and detects the inspection of the control relay closed state
Survey end, unit provides the access state of power resistor in order to control for the test side of the closed state；It is gone here and there in the power flow
It is connected to A.C. contactor CN1 and breaker.The closure of the contactor CN1 is closed by a relay driving, only contactor CN1
After conjunction in power resistor ability access power access, in order to protect power resistor, the closure of relay to set some strategies,
When being more than 30A such as electric current, No. three relays are closed, that is, two power resistors is allowed to work together；When electric current is more than 50A, four tunnels
Relay is closed, and three power resistors is allowed to work together, and such benefit is to protect each power resistor, because of resistance point
After stream, the power of each resistance reduces.It is described control unit and gating mould that working power is also set up in the load box
Block is powered.
According to currently preferred, the power resistor unit includes 13 power resistors, the resistance value of the power resistor
It is respectively with power：
First resistor：4096 ohm of resistance value, 50 watts of power；
Second resistance：2048 ohm of resistance value, 100 watts of power；
3rd resistor：512 ohm of resistance value, 150 watts of power；
4th resistance：256 ohm of resistance value, 300 watts of power；
5th resistance：128 ohm of resistance value, 1500 watts of power；
6th resistance：64 ohm of resistance value, 50 watts of power；
7th resistance：32 ohm of resistance value, 3000 watts of power；
8th resistance：19 ohm of resistance value, 10000 watts of power；
9th resistance：8 ohm of resistance value, 20000 watts of power；
Tenth resistance：4 ohm of resistance value, 12000 watts of power；
Eleventh resistor：2 ohm of resistance value, 10000 watts of power；
Twelfth resistor：1 ohm of resistance value, 10000 watts of power；
Thirteenth resistor：0.5 ohm of resistance value, 5000 watts of power.
According to currently preferred, the capacity of the breaker is 60A.
According to currently preferred, the load box further includes cooling system, is radiated for the load box.The heat dissipation
System is connected with for the external 220V AC powers that the working power is powered.
According to currently preferred, the control relay is 250VAC10A two-way relays.
According to currently preferred, the model STC89C5A60S2 of described control unit.
According to currently preferred, the protection circuit includes being connected in parallel to each other：12V voltage comparison units, 24V voltage ratios
Compared with unit, 90V voltage comparison units, 220V voltage comparison units, 304V voltage comparison units；In the protection circuit and control
It is provided with priority encoder between unit, distributes the power of priority access access external power supply module from high to low according to voltage
The quantity of resistance.It is mono- group of highest priority of 380V to voltage, is that mono- group of 12V is minimum to voltage, control unit reads priority
The output of encoder can determine voltage range, and then power meets the power resistor of the range and can be switched on, and power
Lower power resistor does not allow then to be connected.The advantages of designing herein is, in order to avoid big voltage is added in low resistance, this
Load box is illustrated in figure 3 the schematic diagram of protection circuit there are one circuit is protected, and protects and voltage is grouped in circuit：380V is
One group；220V~380V is one group；90V~220V is one group；24V~90V is one group；12V~24V is one group；It is less than 12V
One group, thus play the role of protection.
A kind of working method of above-mentioned load box, including steps are as follows：
The state of the wherein described load box includes working condition, malfunction and idle state：
1) control unit per secondary control load box when first read load box state：Working condition, malfunction or idle shape
State；
2) it when control unit reads malfunction, then reports an error；
When control unit reads idle state, then operator sends setting operating current by 485 buses to load box
Instruction；
When control unit reads working condition, then described control unit controls load box execution in the case of not powered
Once
Recovery operation, then operator, which is sent by 485 buses to load box, is arranged operating current instruction；
The malfunction：Referring to load box, there are failures, can not use；What the load box response control unit was sent out
Read states instruct；
The idle state：Refer to the state after restoring, all control relays and A.C. contactor CN1 are disconnected；
The working condition：Refer to and is closed according to control unit control section or whole control relays and A.C. contactor CN1
It closes；
After load box starts, it is first carried out and restores load box operation：If correct execute restores load box operation, load
Case enters idle state, and otherwise load box enters malfunction；
The load box restores：A.C. contactor CN1 is disconnected, all control relays is disconnected, is returned by 485 buses
Pass the instruction of load box idle state.
According to currently preferred, the load box is controlled the control of unit, including：
Load box status command is read, the real-time status of load box, malfunction, idle state and the work shape are read
One of three kinds of states of state；
Operating current is arranged to instruct, operator sends setting operating current to complicated case by 485 buses and instructs；
Load box instruction is restored, control unit restores load box, and returns idle state by 485 buses.
According to currently preferred, the implementation procedure for reading load box status command includes：
Operator is sent by 485 buses reads load box status command, and load box returns current state by 485 buses；
It is described setting operating current instruct implementation procedure include：Operator sends setting operating current by 485 buses
Instruction, load box, which is remained untouched the instruction received by 485 buses, returns to operator, operator confirm instruction whether with hair
The instruction gone out is consistent：
If consistent, executed instruction by the transmission of 485 buses, load box receives execute instruction after, operating current is set；
If inconsistent, repetitive operation person sends setting operating current by 485 buses and instructs, and load box passes through 485 buses
The instruction received is remained untouched and returns to operator, operator confirms whether instruction is consistent with the instruction sent out；Pass through passback
The correctness that may insure instruction, prevents occurring the case where error code in transmission process；
It is described restore load box instruction implementation procedure include：Operator sends load box by 485 buses and restores load
Case instruct, load box, which is remained untouched the instruction received by 485 buses, returns to operator, operator confirm instruction whether with
The instruction sent out is consistent：
If consistent, executed instruction by the transmission of 485 buses, load box receives execute instruction after, restore load box, then
The current state that operator's load box is back to by 485 buses is idle state；
If inconsistent, repetitive operation person sends load box by 485 buses and restores load box instruction, and load box passes through 485
Bus, which remains untouched the instruction received, returns to operator, and operator confirms whether instruction is consistent with the instruction sent out；Pass through
Passback may insure the correctness of instruction, prevent occurring the case where error code in transmission process.
According to currently preferred, described control unit receives after setting operating current instructs, and is made according to size of current
Adjustment is as follows：
When it is 0-30A that the instruction that load box receives, which is required through the electric current of power resistor, control unit controls two
The control relay work, one of control relay parallel connection is as power flow；
When it is 30-50A that the instruction that load box receives, which is required through the electric current of power resistor, control unit controls three
The control relay work, two of which control relay parallel connection as power flow；
When it is 50A or more that the instruction that load box receives, which is required through the electric current of power resistor, control unit control four
A control relay work, wherein three control relay parallel connections are as power flow.
Each control relay has the test side as detection power resistor access state all the way.Either control exchange
It is contactor or control power resistor.
Advantage of the invention is that：
1, load box of the present invention quickly can intelligently adjust resistance value, without being walked as slidingtype rheostat
Into go adjust.
2, load box of the present invention is easy to use, it is only necessary to be received and be instructed by 485 buses, according to the instruction received
Adjust automatically load current value, and communication protocol and MODBUS protocol-compliants.
3, load box of the present invention devises a protection circuit, can will not be gone out according to voltage access classes resistance
Now big voltage is connected in low resistance, protects load box.
4, the power that load box of the present invention can be transferred to is very big, when load box voltage takes arbitrary value in 10-380V
Bigger electric current (60A or more) can be transferred to.
5, load box of the present invention is to AC/DC universal, purely resistive.
6, load box of the present invention can use in the case of electrification, be controlled by control module, and being instantaneously switched to needs
The electric current wanted, if it is increase electric current and power have it is bigger, it is necessary to gradually increase electric current, cannot switch moment, with
Exempt from pulse occur；It can instantaneous convert resistance value in the case of not charged.
7, big voltage is added in small load load box of the present invention by user's carelessness in order to prevent, this load box devises
Protect circuit, classification gating load resistance value so that big voltage will not be added on minimum resistance, such as 380V will not be added to 0.2
On the resistance in Europe.
Description of the drawings
Fig. 1 is the block diagram of load box of the present invention；
Fig. 2 is the working condition transition diagram of load box of the present invention；
Fig. 3 is the protection circuit diagram of load box of the present invention；
Fig. 4 is load box Working Examples figure of the present invention.
Specific implementation mode：
The present invention is described in detail with reference to embodiment and Figure of description, but not limited to this.
As shown in Figs 1-4.
Embodiment 1,
A kind of AC/DC universal variable voltage intelligent load case, including control unit, 485 buses, power resistor unit, choosing
Logical unit and protection circuit；The power resistor unit includes multiple power resistor in parallel with gating unit, and the control is single
Member after power resistor parallel connection some or all of in gating unit control power resistor unit by accessing external power supply module；
The gating unit includes control relay identical with the power resistor quantity, control relay respectively with
The power resistor is connected, and the single control relay includes power flow and detects the inspection of the control relay closed state
Survey end, unit provides the access state of power resistor in order to control for the test side of the closed state；It is gone here and there in the power flow
It is connected to A.C. contactor CN1 and breaker.
Embodiment 2,
A kind of AC/DC universal variable voltage intelligent load case as described in Example 1, difference lies in the power electricity
It includes 13 power resistors to hinder unit, and the resistance value and power of the power resistor are respectively：
First resistor：4096 ohm of resistance value, 50 watts of power；
Second resistance：2048 ohm of resistance value, 100 watts of power；
3rd resistor：512 ohm of resistance value, 150 watts of power；
4th resistance：256 ohm of resistance value, 300 watts of power；
5th resistance：128 ohm of resistance value, 1500 watts of power；
6th resistance：64 ohm of resistance value, 50 watts of power；
7th resistance：32 ohm of resistance value, 3000 watts of power；
8th resistance：19 ohm of resistance value, 10000 watts of power；
9th resistance：8 ohm of resistance value, 20000 watts of power；
Tenth resistance：4 ohm of resistance value, 12000 watts of power；
Eleventh resistor：2 ohm of resistance value, 10000 watts of power；
Twelfth resistor：1 ohm of resistance value, 10000 watts of power；
Thirteenth resistor：0.5 ohm of resistance value, 5000 watts of power.
According to currently preferred, the capacity of the breaker is 60A.
Embodiment 3,
A kind of AC/DC universal variable voltage intelligent load case as described in Example 1, difference lies in the load boxs
Further include cooling system, radiates for the load box.
Embodiment 4,
A kind of AC/DC universal variable voltage intelligent load case as described in Example 2, difference lies in, the control after
Electric appliance is 250VAC10A two-way relays.The model STC89C5A60S2 of described control unit.
Embodiment 5,
A kind of AC/DC universal variable voltage intelligent load case as described in Example 2, difference lies in the protection electricity
Road includes being connected in parallel to each other：12V voltage comparison units, 24V voltage comparison units, 90V voltage comparison units, 220V voltages compare
Unit, 304V voltage comparison units；It is provided with priority encoder between protection circuit and the control unit, according to voltage
The quantity of the power resistor of distribution priority access access external power supply module from high to low.
Embodiment 6,
A kind of working method of the load box as described in embodiment 1-5, including steps are as follows：
The state of the wherein described load box includes working condition, malfunction and idle state：
1) control unit per secondary control load box when first read load box state：Working condition, malfunction or idle shape
State；
2) it when control unit reads malfunction, then reports an error；
When control unit reads idle state, then operator sends setting operating current by 485 buses to load box
Instruction；
When control unit reads working condition, then described control unit controls load box execution in the case of not powered
Once
Recovery operation, then operator, which is sent by 485 buses to load box, is arranged operating current instruction；
The malfunction：Referring to load box, there are failures, can not use；What the load box response control unit was sent out
Read states instruct；
The idle state：Refer to the state after restoring, all control relays and A.C. contactor CN1 are disconnected；
The working condition：Refer to and is closed according to control unit control section or whole control relays and A.C. contactor CN1
It closes；
After load box starts, it is first carried out and restores load box operation：If correct execute restores load box operation, load
Case enters idle state, and otherwise load box enters malfunction；
The load box restores：A.C. contactor CN1 is disconnected, all control relays is disconnected, is returned by 485 buses
Pass the instruction of load box idle state.
Embodiment 7,
A kind of working method of load box as described in Example 6, difference lies in the load box is controlled unit
Control, including：
Load box status command is read, the real-time status of load box, malfunction, idle state and the work shape are read
One of three kinds of states of state；
Operating current is arranged to instruct, operator sends setting operating current to complicated case by 485 buses and instructs；
Load box instruction is restored, control unit restores load box, and returns idle state by 485 buses.
Embodiment 8,
A kind of working method of load box as described in Example 7, difference lies in the reading load box status command
Implementation procedure includes：Operator is sent by 485 buses reads load box status command, and load box is returned current by 485 buses
State；
It is described setting operating current instruct implementation procedure include：Operator sends setting operating current by 485 buses
Instruction, load box, which is remained untouched the instruction received by 485 buses, returns to operator, operator confirm instruction whether with hair
The instruction gone out is consistent：
If consistent, executed instruction by the transmission of 485 buses, load box receives execute instruction after, operating current is set；
If inconsistent, repetitive operation person sends setting operating current by 485 buses and instructs, and load box passes through 485 buses
The instruction received is remained untouched and returns to operator, operator confirms whether instruction is consistent with the instruction sent out；
It is described restore load box instruction implementation procedure include：Operator sends load box by 485 buses and restores load
Case instruct, load box, which is remained untouched the instruction received by 485 buses, returns to operator, operator confirm instruction whether with
The instruction sent out is consistent：
If consistent, executed instruction by the transmission of 485 buses, load box receives execute instruction after, restore load box, then
The current state that operator's load box is back to by 485 buses is idle state；
If inconsistent, repetitive operation person sends load box by 485 buses and restores load box instruction, and load box passes through 485
Bus, which remains untouched the instruction received, returns to operator, and operator confirms whether instruction is consistent with the instruction sent out.
Embodiment 8,
A kind of working method of load box as described in Example 6, difference lies in described control unit receives setting work
After current-order, made adjustment according to size of current as follows：
When it is 0-30A that the instruction that load box receives, which is required through the electric current of power resistor, control unit controls two
The control relay work, one of control relay parallel connection is as power flow；
When it is 30-50A that the instruction that load box receives, which is required through the electric current of power resistor, control unit controls three
The control relay work, two of which control relay parallel connection as power flow；
When it is 50A or more that the instruction that load box receives, which is required through the electric current of power resistor, control unit control four
A control relay work, wherein three control relay parallel connections are as power flow.
Each control relay has the test side as detection power resistor access state all the way.Either control exchange
It is contactor or control power resistor.
As shown in figure 4, carrying out power supply panel power supply using this automatic adjustable load box for a power supply panel test platform
Wiring diagram when module measures, power supply panel test platform is linked by 485 buses and the load box, and power supply panel power supply is exported
It is connected to load box.Power supply panel test platform, by 485 buses, sends read states instruction, bears when load box output current is arranged
Instruction can be returned by carrying after case receives instruction, and power supply panel test platform correctly replys confirmation message in confirmation instruction, this
Sample load box will recoil state information；Test platform first resets load box if being to hurry if status information, sends and resets letter
Number, same load box is also required to after being confirmed executing reset function；If state is failure it is necessary to being examined to load box
It repaiies；If state is the free time, test platform sends setting current-order, the electric current to be incidentally adjusted in instruction to load box
Value, load box execute instruction after determine instruction is correct, and load box is adjusted to export the electric current of requirement according to adjustable strategies.
Claims (9)
1. a kind of AC/DC universal variable voltage intelligent load case, which is characterized in that the load box includes control unit, 485
Bus, power resistor unit, gating unit and protection circuit；The power resistor unit includes multiple in parallel with gating unit
Power resistor, after described control unit is by power resistor parallel connection some or all of in gating unit control power resistor unit
Access external power supply module；
The gating unit includes control relay identical with the power resistor quantity, control relay respectively with it is described
Power resistor is connected, and the single control relay includes power flow and detects the detection of the control relay closed state
End, unit provides the access state of power resistor in order to control for the test side of the closed state；It is concatenated in the power flow
There are A.C. contactor CN1 and breaker；
The power resistor unit includes 13 power resistors, and the resistance value and power of the power resistor are respectively：
First resistor：4096 ohm of resistance value, 50 watts of power；
Second resistance：2048 ohm of resistance value, 100 watts of power；
3rd resistor：512 ohm of resistance value, 150 watts of power；
4th resistance：256 ohm of resistance value, 300 watts of power；
5th resistance：128 ohm of resistance value, 1500 watts of power；
6th resistance：64 ohm of resistance value, 50 watts of power；
7th resistance：32 ohm of resistance value, 3000 watts of power；
8th resistance：19 ohm of resistance value, 10000 watts of power；
9th resistance：8 ohm of resistance value, 20000 watts of power；
Tenth resistance：4 ohm of resistance value, 12000 watts of power；
Eleventh resistor：2 ohm of resistance value, 10000 watts of power；
Twelfth resistor：1 ohm of resistance value, 10000 watts of power；
Thirteenth resistor：0.5 ohm of resistance value, 5000 watts of power.
2. a kind of AC/DC universal variable voltage intelligent load case according to claim 1, which is characterized in that the open circuit
The capacity of device is 60A.
3. a kind of AC/DC universal variable voltage intelligent load case according to claim 1, which is characterized in that the load
Case further includes cooling system, is radiated for the load box.
4. a kind of AC/DC universal variable voltage intelligent load case according to claim 1, which is characterized in that the control
Relay is 250VAC10A two-way relays.
5. a kind of AC/DC universal variable voltage intelligent load case according to claim 1, which is characterized in that the control
The model STC89C5A60S2 of unit.
6. a kind of AC/DC universal variable voltage intelligent load case according to claim 1, which is characterized in that the protection
Circuit includes being connected in parallel to each other：12 V voltage comparison units, 24 V voltage comparison units, 90 V voltage comparison units, 220 V electricity
Press comparing unit, 304V voltage comparison units；It is provided with priority encoder, root between protection circuit and the control unit
Distribute the quantity of the power resistor of priority access external power supply module from high to low according to voltage.
7. a kind of working method of load box as claimed in any one of claims 1 to 6, which is characterized in that the method comprising the steps of
It is as follows：
The state of the wherein described load box includes working condition, malfunction and idle state：
1）Load box state is first read when control unit is per secondary control load box：Working condition, malfunction or idle state；
2）When control unit reads malfunction, then report an error；
When control unit reads idle state, then operator sends setting operating current to load box by 485 buses and instructs；
When control unit reads working condition, then described control unit controls load box in the case of not powered and executes once
Recovery operation, then operator, which is sent by 485 buses to load box, is arranged operating current instruction；
The malfunction：Referring to load box, there are failures, can not use；The reading shape that the load box response control unit is sent out
State instructs；
The idle state：Refer to the state after restoring, all control relays and A.C. contactor CN1 are disconnected；
The working condition：Refer to and is closed according to control unit control section or whole control relays and A.C. contactor CN1；
After load box starts, it is first carried out and restores load box operation：If correct execute restores load box operation, load box into
Enter idle state, otherwise load box enters malfunction；
The load box restores：A.C. contactor CN1 is disconnected, all control relays is disconnected, is returned and born by 485 buses
Carry the instruction of case idle state.
8. a kind of working method of load box as claimed in claim 7, which is characterized in that the load box is controlled unit
Control, including：
Load box status command is read, the real-time status of load box, malfunction, idle state and the working condition three are read
One of kind state；
Operating current is arranged to instruct, operator sends setting operating current to multiple load case by 485 buses and instructs；
Load box instruction is restored, control unit restores load box, and returns idle state by 485 buses.
9. the working method of load box as claimed in claim 8, which is characterized in that the execution for reading load box status command
Process includes：
Operator is sent by 485 buses reads load box status command, and load box returns current state by 485 buses；
It is described setting operating current instruct implementation procedure include：Operator sends setting operating current by 485 buses and instructs,
Load box is remained untouched the instruction received by 485 buses returns to operator, operator confirm instruction whether with send out
Instruction is consistent：
If consistent, executed instruction by the transmission of 485 buses, load box receives execute instruction after, operating current is set；
If inconsistent, repetitive operation person sends setting operating current by 485 buses and instructs, and load box will be received by 485 buses
To instruction remain untouched and return to operator, operator confirms whether instruction consistent with the instruction sent out；
It is described restore load box instruction implementation procedure include：Operator, which is sent by 485 buses to load box, restores load box
Instruction, load box, which is remained untouched the instruction received by 485 buses, returns to operator, operator confirm instruction whether with hair
The instruction gone out is consistent：
If consistent, executed instruction by the transmission of 485 buses, load box receives execute instruction after, restore load box, then pass through
The current state that 485 buses are back to operator's load box is idle state；
If inconsistent, repetitive operation person, which is sent by 485 buses to load box, restores load box instruction, and load box is total by 485
Line, which remains untouched the instruction received, returns to operator, and operator confirms whether instruction is consistent with the instruction sent out；
After described control unit receives setting operating current instruction, made adjustment according to size of current as follows：
When it is 0-30A that the instruction that load box receives, which is required through the electric current of power resistor, control unit controls described in two
Relay work is controlled, one of control relay parallel connection is as power flow；
When it is 30-50A that the instruction that load box receives, which is required through the electric current of power resistor, control unit controls described in three
Relay work is controlled, two of which controls relay parallel connection as power flow；
When it is 50A or more that the instruction that load box receives, which is required through the electric current of power resistor, control unit controls four institutes
Control relay work is stated, wherein three control relay parallel connections are as power flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144438.6A CN105588960B (en) | 2016-03-14 | 2016-03-14 | A kind of AC/DC universal variable voltage intelligent load case and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144438.6A CN105588960B (en) | 2016-03-14 | 2016-03-14 | A kind of AC/DC universal variable voltage intelligent load case and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105588960A CN105588960A (en) | 2016-05-18 |
| CN105588960B true CN105588960B (en) | 2018-07-31 |
Family
ID=55928701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610144438.6A Expired - Fee Related CN105588960B (en) | 2016-03-14 | 2016-03-14 | A kind of AC/DC universal variable voltage intelligent load case and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105588960B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581244B (en) * | 2018-10-25 | 2021-03-30 | 中国人民解放军63706部队 | High-power portable noninductive load box |
| CN109324289A (en) * | 2018-10-31 | 2019-02-12 | 湖南福德电气有限公司 | For testing the high-voltage load box of alternating current-direct current output object |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159030Y (en) * | 1993-04-14 | 1994-03-16 | 冀东石油勘探开发公司基建工程部通信站 | Multifunctional electronic load box |
| CN2617005Y (en) * | 2002-12-06 | 2004-05-19 | 成都航空仪表公司 | Programmable standard resistance generator |
| CN1948970A (en) * | 2006-10-30 | 2007-04-18 | 郭晓松 | High power digital varistor and testing method thereof |
| CN201096812Y (en) * | 2007-08-31 | 2008-08-06 | 刘伟 | Intelligent load device for automatic test |
| CN201667264U (en) * | 2009-09-08 | 2010-12-08 | 张晓军 | Digital coding high-power variable resistor |
-
2016
- 2016-03-14 CN CN201610144438.6A patent/CN105588960B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159030Y (en) * | 1993-04-14 | 1994-03-16 | 冀东石油勘探开发公司基建工程部通信站 | Multifunctional electronic load box |
| CN2617005Y (en) * | 2002-12-06 | 2004-05-19 | 成都航空仪表公司 | Programmable standard resistance generator |
| CN1948970A (en) * | 2006-10-30 | 2007-04-18 | 郭晓松 | High power digital varistor and testing method thereof |
| CN201096812Y (en) * | 2007-08-31 | 2008-08-06 | 刘伟 | Intelligent load device for automatic test |
| CN201667264U (en) * | 2009-09-08 | 2010-12-08 | 张晓军 | Digital coding high-power variable resistor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105588960A (en) | 2016-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201540362U (en) | DC power parameter automatic testing device | |
| CN104979797A (en) | Electric leakage protecting device with arc detection function, and electric power consumption equipment | |
| CN201724975U (en) | Brown out detection circuit of electric meter system | |
| CN105588960B (en) | A kind of AC/DC universal variable voltage intelligent load case and its application | |
| CN107910947B (en) | Program-controlled power failure detection and online switching equipment for spacecraft thermal test | |
| CN109193914A (en) | A kind of redundant power intelligent controlling device | |
| CN206865129U (en) | The temperature protective device and electric power system of a kind of binding post | |
| CN205562759U (en) | Miniature circuit breaker capability test device | |
| CN209296837U (en) | Capacitance testing device and equipment | |
| CN100353175C (en) | Test device for small breaker reliability | |
| CN100446373C (en) | Power controller | |
| CN204856200U (en) | Flexible automatic test system of servo controller | |
| CN100413170C (en) | Electric motor control protector | |
| CN100368819C (en) | Reliability tester for electric leakage protector | |
| CN204886154U (en) | Circuit breaker is with intelligent release MCR and HSISC circuit | |
| US20210184452A1 (en) | Virtual electronic circuit breaker | |
| CN202522954U (en) | Alternating-current solid-state power controller | |
| CN110531191B (en) | POE test system, method and device | |
| CN210155268U (en) | High-safety solid-state power distribution unit | |
| CN2534701Y (en) | Electric power socket with adjustable voltage | |
| CN208298434U (en) | A kind of experiment device for teaching of transmission line simulation automatic reclosing | |
| CN208646611U (en) | 24V engineering truck intelligent power management system | |
| CN202725333U (en) | Top rapping control system used for electric precipitation | |
| CN106602637A (en) | Battery equalization channel self-adaptive polarity switching circuit | |
| CN201352681Y (en) | Electronic noncontacting central electrical box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180731 Termination date: 20190314 |