CN101910851B - Load current monitoring device and load power monitoring device - Google Patents
Load current monitoring device and load power monitoring device Download PDFInfo
- Publication number
- CN101910851B CN101910851B CN2008801242176A CN200880124217A CN101910851B CN 101910851 B CN101910851 B CN 101910851B CN 2008801242176 A CN2008801242176 A CN 2008801242176A CN 200880124217 A CN200880124217 A CN 200880124217A CN 101910851 B CN101910851 B CN 101910851B
- Authority
- CN
- China
- Prior art keywords
- circuit
- current value
- load current
- load
- target setting
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
A load current monitoring device which easily stores actual load current as a setting target current value and displays and monitors a change rate with an instantaneous load current value is provided. The device is provided with a setting circuit (13) having a set key which is operated when load current detected by a current detecting circuit (12) is to be set as the setting target current value,a storage circuit (11) storing load current detected by the current detecting circuit (12) based on an operation of the set key as the setting target current value, a logical operation circuit (10) comparing the setting target current value stored in the storage circuit (11) with the instantaneous load current value detected by the current detecting circuit (12) and outputting the change rate of the instantaneous load current value with respect to the setting target current value and a display circuit (15) displaying the change rate by the logical operation circuit (10).
Description
Technical field
The present invention relates to the load current monitoring device (or load power monitoring device) of the load current (or bearing power) of monitoring motor etc., relate to actual loading current value (or bearing power value) storage when setting as target setting current value (or target setting performance number) and target setting current value and momentary load current value (or momentary load performance number) are compared the device of supervision.
Background technology
All the time, at the motor that is connected with the introducing main circuit of electric system with by this in electric motor driven plant equipment, the maintainer of handling facility is for the steady state (SS) of management equipment, and the paster of the load current value (target setting current value) during mostly with the steady state (SS) of display device is attached to the side of current detector.Whether target setting current value shown when the maintainer confirms to stablize when tours of inspection is consistent with current momentary load current value.In addition, patent documentation 1 can be used as the reference technique document.
Yet, in existing device, because along with load increases, increases as the load current of monitored object, they are operated and the affirmation meeting is more required great effort, in fact can not be monitored the momentary load current value of each load by limited maintainer therefore can't monitor it also is actual conditions.Consequently, even slight unusually also can being left in the basket occurs in facility, great just scent is unusual when unusual until have, and exists sometimes to bring the situation of obstacle that such problem occurs to the facility continuous operation.
Patent documentation 1: Japanese patent laid-open 6-189587 communique
Summary of the invention
The present invention finishes in order to eliminate the problems referred to above, its purpose is to obtain a kind of load current monitoring device (or load power monitoring device), this load current monitoring device (or load power monitoring device) is easily stored the load current (or bearing power) of reality as target setting current value (or target setting performance number), and shows the variation ratio of momentary load current value (or momentary load performance number).
In addition, the object of the invention is to obtain a kind of load current monitoring device (or load power monitoring device), this load current monitoring device (or load power monitoring device) easily with the storage of the load current (or bearing power) of reality as target setting current value (or target setting performance number), when with the state of variation ratio more than predetermined value of momentary load current value (or momentary load performance number) under continued the schedule time and this variation ratio shown when above.
Load current monitoring device involved in the present invention comprises: current detection circuit, and this current detection circuit detects the load current as monitored object; Initialization circuit, this initialization circuit have the key that arranges that will operated when being set as the target setting current value by the detected load current of above-mentioned current detection circuit; Memory circuit, this memory circuit will be by the detected load current storage of above-mentioned current detection circuit as the target setting current value based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting current value of above-mentioned memory circuitry stores with compare computing by the detected momentary load current value of above-mentioned current detection circuit, output momentary load current value is with respect to the variation ratio of target setting current value; And display circuit, this display circuit shows the above-mentioned variation ratio of above-mentioned logical operation circuit, load power monitoring device shows that the momentary load current value is with respect to the variation ratio of target setting current value.
In addition, load current monitoring device involved in the present invention comprises: current detection circuit, and this current detection circuit detects the load current as monitored object; Initialization circuit, this initialization circuit have the key that arranges that will operated when being set as the target setting current value by the detected load current of above-mentioned current detection circuit; Memory circuit, this memory circuit will be by the detected load current storage of above-mentioned current detection circuit as the target setting current value based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting current value of above-mentioned memory circuitry stores with compare computing by the detected momentary load current value of above-mentioned current detection circuit, when the lasting schedule time is above under the state that is in respect to the variation ratio of target setting current value at the momentary load current value more than the predetermined value, the output abnormality signal; And display circuit, this display circuit shows the above-mentioned abnormal signal of above-mentioned logical operation circuit, load current monitoring device shows the abnormality of load current.
In addition, load power monitoring device involved in the present invention comprises: current detection circuit and voltage detecting circuit, and this current detection circuit and voltage detecting circuit detect the bearing power as monitored object; Initialization circuit, this initialization circuit have and will will set the key that arranges that is operated when making the target setting performance number by the detected bearing power of above-mentioned current detection circuit and above-mentioned voltage detecting circuit; Memory circuit, this memory circuit will be stored as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting performance number of above-mentioned memory circuitry stores with compare computing by above-mentioned current detection circuit and the detected momentary load performance number of above-mentioned voltage detecting circuit, output momentary load performance number is with respect to the variation ratio of target setting performance number; And display circuit, this display circuit shows the above-mentioned variation ratio of above-mentioned logical operation circuit, load power monitoring device shows that the momentary load performance number is with respect to the variation ratio of target setting performance number.
In addition, load power monitoring device involved in the present invention comprises: current detection circuit and voltage detecting circuit, and this current detection circuit and voltage detecting circuit are to the bearing power as monitored object; Initialization circuit, this initialization circuit have the key that arranges that will operated when being set as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit; Memory circuit, this memory circuit will be stored as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting performance number of above-mentioned memory circuitry stores with compare computing by above-mentioned current detection circuit and the detected momentary load performance number of above-mentioned voltage detecting circuit, when the lasting schedule time is above under the state that is in respect to the variation ratio of target setting performance number in the momentary load performance number more than the predetermined value, the output abnormality signal; And display circuit, this display circuit shows the above-mentioned abnormal signal of above-mentioned logical operation circuit, load power monitoring device shows the abnormality of bearing power.
According to load current monitoring device of the present invention, owing to comprising: initialization circuit, this initialization circuit have the key that arranges that will operated when being set as the target setting current value by the detected load current of current detection circuit; Memory circuit, this memory circuit will be by the detected load current storage of above-mentioned current detection circuit as the target setting current value based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting current value of above-mentioned memory circuitry stores with compare computing by the detected momentary load current value of above-mentioned current detection circuit, output momentary load current value is with respect to the variation ratio of target setting current value; And display circuit, this display circuit shows the above-mentioned variation ratio of above-mentioned logical operation circuit, therefore, can easily the load current of reality be stored as the target setting current value, and can show and monitor that the target setting current value is with respect to the variation ratio of momentary load current value.In addition, switching for load, switching according to load will be inputted described logical operation circuit with the trigger pip of identification label, described logical operation circuit is based on the trigger pip of this band identification label, load current behind the detected certain hour decalage of described current detection circuit is stored in described memory circuit as the target setting current value of band identification label respectively, therefore, after this, for the trigger pip of being identified label by band repeatedly, the target setting current value of the band that records before reading identification label comes to compare computing with the momentary load current value.
In addition, according to load current monitoring device of the present invention, owing to comprising: initialization circuit, this initialization circuit have the key that arranges that will operated when being set as the target setting current value by the detected load current of current detection circuit; Memory circuit, this memory circuit will be by the detected load current storage of above-mentioned current detection circuit as the target setting current value based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting current value of above-mentioned memory circuitry stores with compare computing by the detected momentary load current value of above-mentioned current detection circuit, when the lasting schedule time is above under the state that is in respect to the variation ratio of target setting current value at the momentary load current value more than the predetermined value, the output abnormality signal; And display circuit, this display circuit shows the above-mentioned abnormal signal of above-mentioned logical operation circuit, therefore, can be easily with the load current storage of reality as the target setting current value, and can the momentary load current value is in state more than the predetermined value with respect to the variation ratio of target setting current value under, continue the schedule time and show when above and monitor abnormality.
In addition, according to load power monitoring device of the present invention, owing to comprising: initialization circuit, this initialization circuit have the key that arranges that is operated in the time detected bearing power in by current detection circuit and voltage detecting circuit will being set as the target setting performance number; Memory circuit, this memory circuit will be stored as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting performance number of above-mentioned memory circuitry stores with compare computing by above-mentioned current detection circuit and the detected momentary load performance number of above-mentioned voltage detecting circuit, output momentary load performance number is with respect to the variation ratio of target setting performance number; And display circuit, this display circuit shows the above-mentioned variation ratio of above-mentioned logical operation circuit, therefore can easily the bearing power of reality be stored as the target setting performance number, and can monitor that also the display setting target power value is with respect to the variation ratio of momentary load performance number.
In addition, according to load power monitoring device of the present invention, owing to comprising: current detection circuit and voltage detecting circuit, this current detection circuit and voltage detecting circuit detect the bearing power as monitored object; Initialization circuit, this initialization circuit have the key that arranges that will operated when being set as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit; Memory circuit, this memory circuit will be stored as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting performance number of above-mentioned memory circuitry stores with compare computing by above-mentioned current detection circuit and the detected momentary load performance number of above-mentioned voltage detecting circuit, when being when the lasting schedule time is above under the state more than the predetermined value with respect to the variation ratio of target setting performance number in the momentary load performance number, the output abnormality signal; And display circuit, this display circuit shows the above-mentioned abnormal signal of above-mentioned logical operation circuit, therefore can be easily with the bearing power storage of reality as the target setting performance number, and can the momentary load performance number with respect to the variation ratio of target setting performance number be in state continuance more than the predetermined value schedule time show and the supervision abnormality when above.
In addition, about above-mentioned purpose, feature, viewpoint and effect in addition of the present invention, can further understand by the detailed description following of the present invention of reference accompanying drawing.
Description of drawings
Fig. 1 is the forming circuit figure of the load current monitoring device of expression embodiments of the present invention 1.
Fig. 2 is the oscillogram of action of the load current monitoring device of explanation embodiment 1.
Fig. 3 is the figure of picture example of display circuit that the load current monitoring device of embodiment 1 is shown.
Fig. 4 is the oscillogram of action of the load current monitoring device of explanation embodiment 2.
Fig. 5 is the oscillogram of action of the load current monitoring device of explanation embodiment 3.
Fig. 6 is the oscillogram of action of the load current monitoring device of explanation embodiment 4.
Embodiment
Fig. 1 is the forming circuit figure that the load current monitoring device of embodiment of the present invention 1 is shown, and mainly is used as enclosed switch board, is control center.In the drawings, the zero phase current transformer 5 that from the main circuit 1 that electric system is introduced, is being provided with instrument that wiring detects with isolating switch 2, electromagnetic contactor 3, to the load current of main circuit 11 and detects with transducer 4, to the Zero-phase current of main circuit, and main circuit 1 is that motor 6 is connected with load, utilizes motor 1 driving device equipment operation.Voltage detecting circuit 8 is connected with potential transformer 9, and the voltage of main circuit 1 is detected, converts thereof into prearranged signal and exports logical operation circuit 10 to and memory circuit 11.Current detection circuit 12 is connected with transducer 4 with instrument, and the load current of main circuit 1 is detected, is converted into prearranged signal and exports logical operation circuit 10 to and memory circuit 11.Current detection circuit 12 also is connected with zero phase current transformer 5, and the earth-fault current of main circuit 1 is detected, is converted into prearranged signal and exports logical operation circuit 10 to.
Operation is connected with main circuit 1 with transformer 22.The output voltage of the secondary coil 23 of transformer 22 is applied to wiring 24.An end separately of the coil 25 of electromagnetic contactor 3, auxiliary contact 26, start-up operation switch 27 and shut-down operation switch 28 is connected with wiring 24, and the other end separately is connected with operation signal output circuit 29 and the operation signal input terminal 30,31,32 of control circuit 21.And, the reverse turn operation switch of motor 6 also can be set.The power supply of control circuit 21 is provided by three grades of coils 33 of transformer 22.Thereby the enabling signal that control circuit 21 receives from start-up operation switch 27 reaches the electric current that disconnects the coil 25 of electromagnetic contactor 3 from the stop signal of shut-down operation switch 28.Carry out thus opening, closing of electromagnetic contactor 3.In addition, control circuit 21 opens electromagnetic contactor 3 according to based on from the output of instrument with the logical operation circuit 10 of the current detection signal of transducer 4 and zero phase current transformer by driving circuit 16, carries out overload protection and the ground protection of motor 6.
Fig. 2 is the oscillogram of action of the load current monitoring device of explanation embodiment 1, shows in the situation that starts motor 6 as load, 7 runnings of driving device equipment, and actual load current is with respect to the variation in elapsed time.Load current is large and can change when normal when starting.Therefore, after arriving stationary stage through starting current cancellation time t1, in the moment of hope (for example judging that the maintainer facility system is in the most stable lower time of state), for example longly press the key that arranges that initialization circuit 13 has, the load current of the reality that then will be obtained by current detection circuit 12 under this moment tg stores in the memory circuit 11 as target setting current value Ta.
{(Tax－Ta)/Ta}×100％＝Wa （1）
Thus, can monitor the deviation { variation ratio (%) } with the target setting current value, or the degree of stability of the load under its continuation.
Fig. 3 is the figure that the picture example of the display circuit in the load current monitoring device of embodiment 1 is shown.Momentary load current value (A) 41 when picture shows the forward (FWD) of motor 6, and show momentary load current value Tax with respect to the variation ratio Wa(% of target setting current value Ta) 42.And, shown for example simulation histogram take specified amplitude 10% as benchmark (analog bar graph).Show in the drawings the simulation column Figure 43 till 12%, show with seven scales 44 current 7%.
Like this, in the load current monitoring device of embodiment 1, owing to the load current inscribed when bond energy is enough easily stored this being set as the target setting current value by pressing, and shown the variation ratio (%) of momentary load current value with respect to the target setting current value, therefore can monitor all the time the variation ratio of load current value.
Embodiment 2.
Fig. 4 is the oscillogram of action of the load current monitoring device of explanation embodiment 2.For logical operation circuit 10, set momentary load current value Tax with respect to the predetermined variation ratio of target setting current value Ta (± B%), as setting range Z.And, logical operation circuit 10 with respect to the momentary load current value Tax of target setting current value Ta for predetermined variation ratio more than and this situation when continuing that the schedule time, t2 was above, the output abnormality signal.The abnormal signal of exporting is shown as in display circuit 15 unusually, and demonstrating is that load current is unusual.
In addition, in logical operation circuit 10, if the number of times that above-mentioned abnormal signal occurs is added up, this accumulated value is shown in display circuit 15, then can be according to the degree of stability that how much monitors load of the number of times of above-mentioned abnormal signal.
Fig. 5 is the oscillogram of action of the load current monitoring device of explanation embodiment 3.In the situation that load is switched or the change of duty cycle property, can set a plurality of target setting current values.If the switching timing that makes load change by trigger voltage input 34a, 34b, 34c, 34d or transmission imput output circuit 14 from the outside input as the trigger pip of band identification label (trigger 1, trigger 2, trigger 3, trigger 4, trigger 1 ...), then the load current of logical operation circuit 10 after with the certain hour decalage of each identification marking trigger pip is recorded in the writing circuit 11 the target setting current value as band identification label.After this, for the trigger pip of being identified label by band repeatedly, the target setting current value of the band that records before reading identification label comes to compare computing with the momentary load current value.Comparison operation is identical with embodiment 1 and embodiment 2.
Embodiment 4.
Fig. 6 is the oscillogram of action of the load current monitoring device of explanation embodiment 4.When detecting load current, has the to handle averagely function by making it, even also can improve precision for the load current of fluctuation.Load current detected in the time T m of moment tg1～tg2 is averaged processing, utilize this value that target setting current value Ta is set.Target current value Ta after the setting is identical with embodiment 1～embodiment 3 with the comparison operation of momentary load current value.
Embodiment 5.
In addition, in embodiment 1～embodiment 4, obtain power by load current be multiply by by voltage detecting circuit 8 detected voltages, thereby with bearing power as the target setting performance number, by comparing computing with the momentary load performance number, can monitor the bearing power value.In addition, although come detection power from current detection circuit and voltage detecting circuit, these two circuit are equivalent to power-sensing circuit.
The structure of embodiment 5 is as described below.Load power monitoring device comprises: current detection circuit and voltage detecting circuit, and this current detection circuit and voltage detecting circuit detect the bearing power as monitored object; Initialization circuit, this initialization circuit have will be when being set as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit operation setting key in addition; Memory circuit, this memory circuit will be stored as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting performance number of above-mentioned memory circuitry stores with compare computing by above-mentioned current detection circuit and the detected momentary load performance number of above-mentioned voltage detecting circuit, output momentary load performance number is with respect to the variation ratio of target setting performance number; And display circuit, this display circuit shows the above-mentioned variation ratio of above-mentioned logical operation circuit, load power monitoring device shows that the momentary load performance number is with respect to the variation ratio of target setting performance number.
In addition, load power monitoring device comprises: current detection circuit and voltage detecting circuit, and this current detection circuit and voltage detecting circuit detect the bearing power as monitored object; Initialization circuit, this initialization circuit have the key that arranges that will operated when being set as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit; Memory circuit, this memory circuit will be stored as the target setting performance number by above-mentioned current detection circuit and the detected bearing power of above-mentioned voltage detecting circuit based on the above-mentioned action that key is set; Logical operation circuit, this logical operation circuit will by the target setting performance number of above-mentioned memory circuitry stores with compare computing by above-mentioned current detection circuit and the detected momentary load performance number of above-mentioned voltage detecting circuit, when the lasting schedule time is above under the state that is in respect to the variation ratio of target setting performance number in the momentary load performance number more than the predetermined value, the output abnormality signal; And display circuit, this display circuit shows the above-mentioned abnormal signal of above-mentioned logical operation circuit, load power monitoring device shows the abnormality of bearing power.
Claims (3)
1. a load current monitoring device is characterized in that, comprising:
Current detection circuit (12), this current detection circuit (12) detects the load current as monitored object;
Initialization circuit (13), this initialization circuit (13) have the key that arranges that will operated when being set as the target setting current value by the detected load current of described current detection circuit (12);
Memory circuit (11), this memory circuit (11) will be by the detected load current storage of described current detection circuit as the target setting current value based on the described action that key is set;
Logical operation circuit (10), this logical operation circuit (10) will by the target setting current value of described memory circuit (11) storage with compare computing by the detected momentary load current value of described current detection circuit (12), output momentary load current value is with respect to the variation ratio of target setting current value; And,
Display circuit (15), this display circuit (15) show the described variation ratio of described logical operation circuit (10),
Described load current monitoring device shows the momentary load current value with respect to the variation ratio of target setting current value,
And, switching for load, switching according to load will be inputted described logical operation circuit (10) with the trigger pip of identification label, described logical operation circuit (10) is stored in described memory circuit (11) as the target setting current value of band identification label based on the trigger pip of this band identification label respectively with the load current behind the detected certain hour decalage of described current detection circuit (12).
2. load current monitoring device as claimed in claim 1 is characterized in that,
When the lasting schedule time is above under the state that is in respect to the variation ratio of target setting current value at the momentary load current value more than the predetermined value, described logical operation circuit (10) output abnormality signal, described display circuit (15) shows the described abnormal signal of described logical operation circuit (10).
3. load current monitoring device as claimed in claim 2 is characterized in that,
Described logical operation circuit (10) adds up the number of times of described abnormal signal, and the number of times of described abnormal signal is presented in the described display circuit (15).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-033233 | 2008-02-14 | ||
| JP2008033233 | 2008-02-14 | ||
| PCT/JP2008/058838 WO2009101711A1 (en) | 2008-02-14 | 2008-05-14 | Load current monitoring device and load power monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101910851A CN101910851A (en) | 2010-12-08 |
| CN101910851B true CN101910851B (en) | 2013-09-18 |
Family
ID=40956755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801242176A Active CN101910851B (en) | 2008-02-14 | 2008-05-14 | Load current monitoring device and load power monitoring device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5147864B2 (en) |
| KR (1) | KR101156336B1 (en) |
| CN (1) | CN101910851B (en) |
| TW (1) | TWI384747B (en) |
| WO (1) | WO2009101711A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101350619B1 (en) * | 2012-10-05 | 2014-01-13 | 한국수력원자력 주식회사 | Method for detecting false signal of power sistem |
| US9829542B2 (en) * | 2014-05-15 | 2017-11-28 | Microchip Technology Incorporated | Circuit for measuring power violations using high side current sensing |
| WO2018079163A1 (en) * | 2016-10-26 | 2018-05-03 | 日立オートモティブシステムズ株式会社 | Vehicle control unit |
| CN108879912B (en) * | 2018-07-28 | 2021-08-10 | 安徽诚意电气科技有限公司 | Intelligent regulation and control system of circuit breaker based on load current detection |
| JP7432384B2 (en) | 2020-02-05 | 2024-02-16 | 日本メクトロン株式会社 | Printed board |
| JP7302518B2 (en) * | 2020-03-31 | 2023-07-04 | ブラザー工業株式会社 | Numerical controller |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49129813A (en) * | 1973-04-18 | 1974-12-12 | ||
| JPH0362107A (en) * | 1989-07-31 | 1991-03-18 | Toshiba Corp | Power unit with overload detecting function |
| JPH07245987A (en) * | 1994-03-04 | 1995-09-19 | Tsubakimoto Chain Co | Load monitoring apparatus |
| JP3380906B2 (en) * | 1996-01-18 | 2003-02-24 | 日本電気エンジニアリング株式会社 | Load condition monitoring method |
| JP2004219171A (en) * | 2003-01-10 | 2004-08-05 | Matsushita Electric Works Ltd | Information on equipment specifying device and characteristic amount detecting device for load equipment |
| JP4964402B2 (en) * | 2003-07-18 | 2012-06-27 | 小松電機産業株式会社 | Water treatment facility management system |
-
2008
- 2008-05-14 JP JP2009553326A patent/JP5147864B2/en active Active
- 2008-05-14 WO PCT/JP2008/058838 patent/WO2009101711A1/en active Application Filing
- 2008-05-14 KR KR1020107009334A patent/KR101156336B1/en active IP Right Grant
- 2008-05-14 CN CN2008801242176A patent/CN101910851B/en active Active
- 2008-06-09 TW TW097121368A patent/TWI384747B/en active
Non-Patent Citations (6)
| Title |
|---|
| JP平3-62107A 1991.03.18 |
| JP特开2004-219171A 2004.08.05 |
| JP特开2005-34810A 2005.02.10 |
| JP特开平7-245987A 1995.09.19 |
| JP特开平9-196987A 1997.07.31 |
| JP特开昭49-129813A 1974.12.12 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009101711A1 (en) | 2009-08-20 |
| TW200935718A (en) | 2009-08-16 |
| TWI384747B (en) | 2013-02-01 |
| KR101156336B1 (en) | 2012-06-13 |
| JP5147864B2 (en) | 2013-02-20 |
| JPWO2009101711A1 (en) | 2011-06-02 |
| KR20100072318A (en) | 2010-06-30 |
| CN101910851A (en) | 2010-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101910851B (en) | Load current monitoring device and load power monitoring device | |
| US10148203B2 (en) | Motor driving apparatus including DC link voltage detection unit | |
| US8275562B2 (en) | Method for evaluating remaining electric charge of a battery, and associated single chip system | |
| CN108152738B (en) | Motor working condition monitoring method and device | |
| CN103703493A (en) | Merchandise sensor and method for protecting an item of merchandise | |
| US20170350924A1 (en) | Device for measuring loss in reactive power compensation system | |
| CN102539990A (en) | Capacitor short circuit detecting circuit | |
| CN109656301A (en) | The method of the voltage slope of real-time slop control device and real-time control voltage-stablizer | |
| CN106469629B (en) | Self study relay turns off control system and method | |
| US20190356250A1 (en) | Motor driving circuit | |
| US3034051A (en) | Electrical apparatus | |
| CN105761387A (en) | Information Processing Apparatus And Peripheral Device | |
| JP2007085843A (en) | Failure detector for electric current sensor and its method | |
| CN107203152B (en) | A kind of energy-saving device and the weight testing method that economizes on electricity | |
| US20090261855A1 (en) | Method and system for incorporating electronic signature analysis in low voltage power supplies | |
| US8030869B2 (en) | Drive amplifier system and over-current detection method for the same | |
| CN105892379B (en) | A kind of method and intelligent controller to pre- power purchase arrearage trip(ping) circuit implementing monitoring | |
| CN111381195B (en) | Output/input pin abnormity detection system and method thereof | |
| JP4770723B2 (en) | Rechargeable cell status detection method | |
| CN109075700A (en) | For determining the detection system and power-supply system of the out-of-balance current in DC-DC electric pressure converter and over-current condition | |
| JP2007282439A (en) | Digital protective relay and its sampling device | |
| JP2010104148A (en) | Digital protection control device, and power supply ripple monitoring substrate and power supply ripple monitoring method for the same | |
| US7848855B2 (en) | Method for operating a system of modular structure, in particular a process automation system | |
| US20220263325A1 (en) | Power supply circuit | |
| CN110568295B (en) | AC/DC load fault detection circuit and detection method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |