CN203838315U - Three-phase motor phase sequence and steering measurement device - Google Patents
Three-phase motor phase sequence and steering measurement device Download PDFInfo
- Publication number
- CN203838315U CN203838315U CN201420261550.4U CN201420261550U CN203838315U CN 203838315 U CN203838315 U CN 203838315U CN 201420261550 U CN201420261550 U CN 201420261550U CN 203838315 U CN203838315 U CN 203838315U
- Authority
- CN
- China
- Prior art keywords
- circuit
- electric machine
- phase
- signal
- phase electric
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
The utility model discloses a three-phase motor phase sequence and steering measurement device, which comprises three same paths of weak voltage signal acquisition circuits, three same paths of high voltage acquisition circuits, a square wave circuit, a full wave circuit, a central processing unit and a display driving circuit, wherein the signal output ends of the weak voltage signal acquisition circuits and the signal output ends of the high voltage signal acquisition circuits are connected with three signal input ends of the square wave circuit; the square wave circuit is connected with the three signal input ends of the full wave circuit; the full wave circuit is connected with the signal input end of the central processing unit; signals of the central processing unit is connected with the display driving circuit; and signals of the display driving circuit is connected with a display circuit. the three-phase motor phase sequence and steering measurement device can be applied to both the situation of residual magnetism and the situation of non residual magnetism in the three-phase motor winding, the structure is simple, the application range is wide, the phase sequence and steering of the three-phase motor winding can be accurately measured, failure due to reverse phase sequence during the operation process of the three-phase motor can be effectively avoided, and the display is intuitive.
Description
Technical field
The utility model belongs to technical field of electricity, is specifically related to a kind of three-phase electric machine phase sequence and turns to determinator.
Background technology
Three phase electric machine is widely used in industrial and agricultural production.Three phase electric machine in actual use, the correctness of phase sequence has played very large impact to the normal operation of three phase electric machine, in the time that three phase electric machine need to be incorporated into the power networks, after three phase electric machine installation, must guarantee the correctness of its phase sequence, otherwise there will be three phase electric machine normally not use, even burn out the danger of three phase electric machine.Now widely used phase-sequence meter can only could be determined phase sequence after three phase electric machine running, uses very inconvenient.For threephase asynchronous, conventionally need to before wiring, determine that it turns to.The three phase electric machine slew test instrument using at present, indicate directly perceived not, use also inconvenient, and these testing tools must could correctly be indicated in the situation that three phase electric machine has certain remanent magnetism, when the remanent magnetism of three phase electric machine is very weak while even not having, it is cisco unity malfunction all, and this makes three phase electric machine remanent magnetism is very weak even there is no remanent magnetism in the situation that, the test that can not use this testing tool to turn to.
Summary of the invention
The utility model aims to provide a kind of three-phase electric machine phase sequence and turns to determinator, can before three phase electric machine running, determine its phase sequence and turn to.
For solving the problems of the technologies described above, the utility model provides following technical scheme: a kind of three-phase electric machine phase sequence with turn to determinator, comprise the light current pressure signal acquisition circuit that three tunnels are identical, for gathering the remanent magnetism voltage signal on three phase electric machine three phase windings, the strong voltage Acquisition Circuit that three tunnels are identical, for gathering the power supply voltage signal on three-phase supply, also comprise circuit and square-wave, whole wave circuit, CPU (central processing unit) and display driver circuit, described light current is pressed three signal input parts of the signal output part of signal acquisition circuit and the signal output part connection side wave circuit of strong voltage signal acquisition circuit, three signal output parts of circuit and square-wave connect three signal input parts of whole wave circuit, three signal output parts of whole wave circuit connect the signal input part of CPU (central processing unit), the signal output part of CPU (central processing unit) connects display driver circuit, the signal output part of described display driver circuit connects display circuit, also being included as each circuit provides the DC circuit of direct supply, for the charge circuit magnetizing without remanent magnetism or the very weak three phase electric machine of remanent magnetism.
Described every road light current presses signal acquisition circuit to include weak sample resistance, described weak sample resistance one end connects a connection terminal of three phase electric machine winding, other end ground connection, the connection terminal of described three phase electric machine winding is the signal input part of connection side's wave circuit also, and the connection terminal of described three phase electric machine winding also connects sampling filter capacitor.
Described every road strong voltage signal acquisition circuit includes weak sample resistance and strong sample resistance, described strong sample resistance one end connects a phase of three-phase supply, the other end connects weak one end of sample resistance and the signal input part of circuit and square-wave, the other end ground connection of weak sample resistance, the signal input part of described circuit and square-wave also connects sampling filter capacitor.
Described circuit and square-wave comprises operational amplifier, the reverse inter-input-ing ending grounding of described operational amplifier, three normal phase input ends connect respectively light current and press signal acquisition circuit and strong voltage signal acquisition circuit, three output terminals of described operational amplifier connect whole wave circuit, and three output terminals of operational amplifier also connect respectively three square wave filter capacitors.
Described whole wave circuit comprises three Sheffer stroke gates, and two input ends of described Sheffer stroke gate are connected, and the output terminal of concatenation operation amplifier, and the output terminal of three Sheffer stroke gates connects the signal input part of CPU (central processing unit).
Described display driver circuit comprises Darlington transistor, and three signal input parts of Darlington transistor connect the signal output part of CPU (central processing unit), and three signal output parts of Darlington transistor connect display circuit.
Described display circuit comprises three signal lamps that color is different, and it is yellow, green, red that described three colors are respectively, and described three signal lamps are triangularly arranged.
Also comprise DC circuit and charge circuit, the operation that described DC circuit is each circuit provides direct supply, comprise Chargeable direct current power supply, described Chargeable direct current power supply connects civil power output terminal by charge switch and miniature voltage table, also connects each circuit by starting feeler switch; Described charge circuit is to magnetize without remanent magnetism or the very weak three phase electric machine of remanent magnetism, comprises the button that magnetizes, described in the button one end of magnetizing connect Chargeable direct current power supply, the other end connects three phase electric machine winding connection terminal by miniature reometer.
The phase sequence of the three phase electric machine that the utility model provides with turn to determinator, phase sequence and the mensuration turning to before can realizing before three phase electric machine running, the while can be measured the phase sequence of three-phase supply, intuitive display, effectively guarantees the safe handling of three phase electric machine.
Brief description of the drawings
Fig. 1 is the theory diagram of the utility model embodiment;
Fig. 2 is the schematic diagram that light current is pressed signal acquisition circuit and strong voltage signal acquisition circuit;
Fig. 3 is the schematic diagram of circuit and square-wave;
Fig. 4 is the schematic diagram of whole wave circuit;
Fig. 5 is the schematic diagram of display driver circuit;
Fig. 6 is the schematic diagram of DC circuit and charge circuit;
Fig. 7 is the Pareto diagram of pilot lamp described in the utility model.
Embodiment
The utility model is by gathering the remanent magnetism voltage signal in three phase windings of three phase electric machine, in the time that remanence ratic is weak, three phase windings of three phase electric machine are magnetized with charge circuit, utilize circuit and square-wave that the sinusoidal signal collecting is converted to square-wave signal, and signal is optimized with whole wave circuit, signal after optimizing is input to CPU (central processing unit), signal is input to driving circuit by CPU (central processing unit), thereby driving display circuit, instruction measurement result, the utility model also can be used for the mensuration of the phase sequence of three-phase supply.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.
The utility model discloses a kind of three-phase electric machine phase sequence and turn to determinator, as shown in Figure 1: comprise light current pressure signal acquisition circuit, strong voltage signal acquisition circuit, circuit and square-wave, whole wave circuit, CPU (central processing unit) and display driver circuit, described light current presses signal acquisition circuit to have three tunnels, its signal input part connects respectively three connection terminals of three phase electric machine winding, and signal output part is the signal input part of connection side's wave circuit respectively, strong voltage signal acquisition circuit has three tunnels, its signal input part connects respectively three connection terminals of three-phase supply, output terminal is the signal input part of connection side's wave circuit respectively, the signal output part of described circuit and square-wave connects whole wave circuit, described whole wave circuit has three tunnels, its signal output part connects respectively three signal input parts of CPU (central processing unit), three signal output parts of CPU (central processing unit) connect the signal input part of display driver circuit, the signal output part of described display driver circuit connects display circuit, described display circuit shows the phase sequence of three phase electric machine intuitively, turn to or the phase sequence of three-phase supply.The utility model also comprises reset circuit, clock circuit, DC circuit and charge circuit, described reset circuit is electrify restoration circuit, connect the reset signal input end of CPU (central processing unit), in the situation that CPU (central processing unit) race flies, re-power reset signal is provided, thereby CPU (central processing unit) is carried out to initialization, and described clock circuit connects the clock signal input terminal of CPU (central processing unit), for the normal work of CPU (central processing unit) provides clock signal; Described DC circuit provides direct supply for each circuit, and charge circuit is that remanent magnetism is very weak or do not have the three phase electric machine of remanent magnetism to magnetize, thereby carries out the mensuration of three-phase electric machine phase sequence.
As shown in Figure 2, described light current presses signal acquisition circuit to have three tunnels, comprise respectively weak sample resistance R11, R12, R13, be respectively used to gather the voltage on three windings of three phase electric machine, comprise weak sample resistance R11 as an example of the first via example, one end of described weak sample resistance R11 connects a phase winding of three phase electric machine by the pin 3 of weak signal terminal group J1, the other end ground connection of weak sample resistance R11, the first signal input end V1 of pin 3 connection side's wave circuits of described weak signal terminal group J1.On the pin 3 of described weak signal terminal group J1, also connect one end of the first sampling filter capacitor C11, the other end ground connection of the first sampling filter capacitor C11, in figure, V1, V2, V3 represent the signal input part of circuit and square-wave circuit.
Described strong voltage signal acquisition circuit has three tunnels, for gathering the voltage on the three-phase of three-phase supply, comprise weak sample resistance R11 as an example of the first via example, take sample resistance R 21 by force, the described first end of taking sample resistance R 21 by force connects a wherein phase of three-phase supply by connecting the pin 3 of strong signal terminal set J2, the second end of taking sample resistance R 21 by force connects weak one end of sample resistance R11 and the first signal input end V1 of circuit and square-wave, the other end ground connection of weak sample resistance R11, described the second end of taking sample resistance R 21 by force also connects one end of the first sampling filter capacitor C11, the other end ground connection of the first sampling filter capacitor C11.
As shown in Figure 3, described circuit and square-wave is converted to square-wave signal for the sinusoidal signal of pressing signal acquisition circuit or strong voltage signal acquisition circuit to collect light current, comprise that operational amplifier U1(model is LMB39), the first normal phase input end (pin IN+1) of described operational amplifier U1 connects first via light current and presses the output terminal of signal acquisition circuit and the output terminal of first via strong voltage signal acquisition circuit, the first inverting input (pin IN-1) ground connection of operational amplifier U1, the 4th normal phase input end (pin IN+4) of described operational amplifier U1 and also ground connection of the 4th inverting input (IN-4), the first signal output terminal (pin OUT1) of described operational amplifier U1 connects the first end of the first pull-up resistor R31 and the first end of the first square wave filter capacitor C32, the second end of the first pull-up resistor R31 connects direct supply, the second end ground connection of the first square wave filter capacitor C32, for transmitting the weak voltage signal of the first via or square-wave signal corresponding to first via strong voltage signal.The secondary signal output terminal (pin OUT2) of operational amplifier U1 connects the first end of the second pull-up resistor R32 and the first end of the second square wave filter capacitor C33, the second end of the second pull-up resistor R32 connects direct supply, the second end ground connection of the second square wave filter capacitor C33, for transmitting voltage signal or square-wave signal corresponding to the second road strong voltage signal a little less than the second road.The 3rd signal output part (pin OUT3) of described operational amplifier U1 connects the first end of the 3rd pull-up resistor R33 and the first end of third party's ripple filter capacitor C34, the second end of the 3rd pull-up resistor R33 connects direct supply, the second end ground connection of third party's ripple filter capacitor C34, for transmitting voltage signal or square-wave signal corresponding to Third Road strong voltage signal a little less than Third Road.First of described operational amplifier U1, second, the 3rd signal output part also connects respectively the first via, the second tunnel, the signal input part FB1 of the whole wave circuit of Third Road, FB2, FB3, the power supply signal input end of operational amplifier U1 connects direct supply, described direct supply also connects be connected in parallel the first regulated power supply electric capacity E31 and the first definite value power capacitor C31, thereby make the output of direct supply more stable, operational amplifier U1 is according to the sinusoidal signal receiving, in the time exceeding threshold value, generate high level signal, during lower than threshold value, generate low level signal, thereby convert sinusoidal signal to square-wave signal, using operational amplifier to convert sinusoidal signal to square-wave signal is ripe prior art.
As shown in Figure 4, described whole wave circuit is for carrying out whole ripple to collecting square-wave signal, make signal more stable, taking the first via as example, comprise that the first Sheffer stroke gate U2A(model is CD4039B), two input ends of the first Sheffer stroke gate U2A connect, and be connected with the first signal output terminal (pin OUT1) of operational amplifier U1, it is AT89C2051 that the output terminal of the first Sheffer stroke gate U2A connects single-chip microcomputer U3(model) first signal input end (pin P32), clock signal input terminal (the pin XTAL1 of described single-chip microcomputer U3, pin XTAL2) all connect oscillator signal input end (the pin X1 of described single-chip microcomputer U1, X2) two pins of connection crystal oscillator Y1, a pin of crystal oscillator Y1 connects one end of the first oscillating capacitance C41, the other end ground connection of the first oscillating capacitance C41, another pin of crystal oscillator Y1 connects one end of the second oscillating capacitance C42, the other end ground connection of the second oscillating capacitance C42.The reset signal input end (pin RST) of single-chip microcomputer U3 connects the first end of reset resistor R41, the second end ground connection of reset resistor R41, the first end of reset resistor R41 also connects direct supply by variable reset capacitance E41, described direct supply is also by the second regulated power supply electric capacity E42 and the second definite value power capacitor C43 ground connection that are connected in parallel, thereby make the output of direct supply more stable, there is no noise jamming, three signal output part ZB1 of single-chip microcomputer U1, ZB2, ZB3(pin is respectively P1.4, P1.3, P1.2) connect respectively three signal input parts of display driver circuit.
As shown in Figure 5, described display driver circuit is for amplifying the signal receiving, thereby meet the power requirement of signal lamp, play the effect that drives signal lamp, comprise that Darlington transistor U4(model is ULN2004), three signal input parts of described Darlington transistor U4 connect respectively three signal output part ZB1 of single-chip microcomputer U1, ZB2, ZB3, taking first signal input part ZB1 as example, first signal input end (pin I1) connects the first signal output terminal (pin P1.4) of single-chip microcomputer U1, thereby the square-wave signal that single-chip microcomputer U1 is transmitted carries out the amplification of power, (pin is respectively O1 to three signal output parts of described Darlington transistor U4, O2, O3) connect signal lamp connection terminal J3, described signal lamp connection terminal J3 connects three signal lamps, single-chip microcomputer U1 converts the square-wave signal receiving to low and high level, be transferred to the amplification that Darlington transistor U4 carries out power, Darlington transistor U4 lights or closes according to the corresponding signal lamp of signal driver receiving, utilize single-chip microcomputer to convert the square-wave signal receiving to low and high level for ripe prior art.
As shown in Figure 7, it is yellow, red, green that the color of three described signal lamps is respectively, three in one plane, and not point-blank.
As shown in Figure 6, described DC circuit is used to the operation of each circuit that direct supply is provided, comprise Chargeable direct current power supply, described Chargeable direct current power supply connects direct current connection terminal J10, described direct current connection terminal J10 connects charge switch connection terminal J6, the upper charge switch that connects of charge switch connection terminal J6, charge switch connection terminal J6 connects miniature voltage table connection terminal J5, the miniature voltage table of the upper connection of miniature voltage table connection terminal J5, be used to indicate the size of voltage in charging process, miniature voltage table connection terminal J5 connecting charger connection terminal J4, the upper connecting charger of charger connection terminal J4, pressing after charge switch charger by miniature voltage table, charge switch charges to Chargeable direct current power supply, Chargeable direct current connection terminal J10 also connects startup test connection terminal J11, start test connection terminal J11 and connect startup feeler switch, pressing after startup feeler switch, the operation that Chargeable direct current power supply is each circuit provides direct supply, thereby start three-phase electric machine phase sequence and the mensuration turning to.
Described charge circuit is that three phase electric machine magnetizes, to make smaller at three phase electric machine remanent magnetism or to carry out three-phase electric machine phase sequence and the mensuration turning to there is no remanent magnetism in the situation that, comprise the button connection terminal J7 that magnetizes, the upper button that magnetizes that connects of the connection terminal J7 that magnetizes, button connection terminal one end connection Chargeable direct current power supply terminal J10 magnetizes, one end connects miniature reometer connection terminal J8, the described miniature reometer of the upper connection of miniature reometer connection terminal J8, for showing the size of the electric current that the process of magnetizing flows through, miniature reometer connection terminal J8 connects the connection terminal J9 that magnetizes, the connection terminal J9 that magnetizes connects the three phase electric machine winding that need to magnetize, in the time that needs magnetize, press the button that magnetizes, Chargeable direct current power supply starts the winding of three phase electric machine to magnetize, thereby it is met and can carry out phase sequence and the degree that turns to mensuration.
While carrying out the mensuration of three-phase electric machine phase sequence, first the connection terminal of three phase electric machine winding is connected on weak signal terminal group J1, press to start to test and build, rotate the rotor of three phase electric machine, three signal lamps are luminous successively, because signal lamp is triangularly arranged, so three signal lamps can be luminous successively in rotary manner, if the luminous sense of rotation of signal lamp is identical with the sense of rotation of rotor, the connected mode of three phase electric machine winding is positive phase sequence.
In the time carrying out the mensuration of three phase electric machine rotation direction, first carry out the mensuration of three-phase electric machine phase sequence according to above-mentioned steps, if three phase electric machine is connected with power supply according to the mode of positive phase sequence, three phase electric machine forward, otherwise three phase electric machine reversion.
In the time testing, the remanent magnetism of finding three phase electric machine is very weak, while being not enough to use this device to carry out the mensuration of three-phase electric machine phase sequence, three phase electric machine winding is connected to and is magnetized on connection terminal J8, press the button that magnetizes, three phase electric machine is magnetized, afterwards, can use said method to carry out the mensuration of three-phase electric machine phase sequence.
This device also can be used for the mensuration of three-phase power supply phase sequence, first the connection terminal of power supply is connected to strong signal terminal set J2, presses startup feeler switch, and three signal lamps are lighted successively, if signal lamp light clockwise, now power supply be connected to positive phase sequence.
The utility model provides a kind of three-phase electric machine phase sequence and the determinator turning to, be applicable to have in three phase electric machine winding the situation of remanent magnetism, simultaneously owing to being equipped with charge circuit, so be suitable for too during without remanent magnetism in three phase electric machine winding, simple in structure, applied widely, can go out the phase sequence of three phase electric machine winding and turn to by Accurate Determining, effectively avoid breaking down because phase sequence connects on the contrary in three phase electric machine operation process, intuitive display.
Claims (8)
- A three-phase electric machine phase sequence with turn to determinator, it is characterized in that: comprise the light current pressure signal acquisition circuit that three tunnels are identical, for gathering the remanent magnetism voltage signal on three phase electric machine three phase windings, the strong voltage Acquisition Circuit that three tunnels are identical, for gathering the power supply voltage signal on three-phase supply, also comprise circuit and square-wave, whole wave circuit, CPU (central processing unit) and display driver circuit, described light current is pressed three signal input parts of the signal output part of signal acquisition circuit and the signal output part connection side wave circuit of strong voltage signal acquisition circuit, three signal output parts of circuit and square-wave connect three signal input parts of whole wave circuit, three signal output parts of whole wave circuit connect the signal input part of CPU (central processing unit), the signal output part of CPU (central processing unit) connects display driver circuit, the signal output part of described display driver circuit connects display circuit, also being included as each circuit provides the DC circuit of direct supply, also be included as the charge circuit magnetizing without remanent magnetism or the very weak three phase electric machine of remanent magnetism.
- Three-phase electric machine phase sequence as claimed in claim 1 with turn to determinator, it is characterized in that: described every road light current presses signal acquisition circuit to include weak sample resistance, described weak sample resistance one end connects a connection terminal of three phase electric machine winding, other end ground connection, the connection terminal of described three phase electric machine winding is the signal input part of connection side's wave circuit also, and the connection terminal of described three phase electric machine winding also connects sampling filter capacitor.
- Three-phase electric machine phase sequence as claimed in claim 2 with turn to determinator, it is characterized in that: described every road strong voltage signal acquisition circuit includes weak sample resistance and strong sample resistance, described strong sample resistance one end connects a phase of three-phase supply, the other end connects weak one end of sample resistance and the signal input part of circuit and square-wave, the other end ground connection of weak sample resistance, the signal input part of described circuit and square-wave also connects sampling filter capacitor.
- Three-phase electric machine phase sequence as claimed in claim 3 with turn to determinator, it is characterized in that: described circuit and square-wave comprises operational amplifier, the reverse inter-input-ing ending grounding of described operational amplifier, three normal phase input ends connect respectively light current and press signal acquisition circuit and strong voltage signal acquisition circuit, three output terminals of described operational amplifier connect whole wave circuit, and three output terminals of operational amplifier also connect respectively three square wave filter capacitors.
- Three-phase electric machine phase sequence as claimed in claim 4 with turn to determinator, it is characterized in that: described whole wave circuit comprises three Sheffer stroke gates, two input ends of described Sheffer stroke gate are connected, and the output terminal of concatenation operation amplifier, the output terminal of three Sheffer stroke gates connects the signal input part of CPU (central processing unit).
- Three-phase electric machine phase sequence as claimed in claim 5 with turn to determinator, it is characterized in that: described display driver circuit comprises Darlington transistor, three signal input parts of Darlington transistor connect the signal output part of CPU (central processing unit), and three signal output parts of Darlington transistor connect display circuit.
- Three-phase electric machine phase sequence as claimed in claim 6 with turn to determinator, it is characterized in that: described display circuit comprises three signal lamps that color is different, it is yellow, green, red that described three colors are respectively, and described three signal lamps are triangularly arranged.
- Three-phase electric machine phase sequence as claimed in claim 7 with turn to determinator, it is characterized in that: also comprise DC circuit and charge circuit, the operation that described DC circuit is each circuit provides direct supply, comprise Chargeable direct current power supply, described Chargeable direct current power supply connects civil power output terminal by charge switch and miniature voltage table, also connects each circuit by starting feeler switch; Described charge circuit is to magnetize without remanent magnetism or the very weak three phase electric machine of remanent magnetism, comprises the button that magnetizes, described in the button one end of magnetizing connect Chargeable direct current power supply, the other end connects three phase electric machine winding connection terminal by miniature reometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261550.4U CN203838315U (en) | 2014-05-21 | 2014-05-21 | Three-phase motor phase sequence and steering measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261550.4U CN203838315U (en) | 2014-05-21 | 2014-05-21 | Three-phase motor phase sequence and steering measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203838315U true CN203838315U (en) | 2014-09-17 |
Family
ID=51516139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420261550.4U Withdrawn - After Issue CN203838315U (en) | 2014-05-21 | 2014-05-21 | Three-phase motor phase sequence and steering measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203838315U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969582A (en) * | 2014-05-21 | 2014-08-06 | 中国化学工程第十一建设有限公司 | Phase sequence and steering measuring method and device for three-phase motor |
| CN105337554A (en) * | 2015-11-18 | 2016-02-17 | 南车青岛四方机车车辆股份有限公司 | Steering judging system and method of motor train unit traction electric machine |
| CN109507491A (en) * | 2018-10-19 | 2019-03-22 | 陕西航空电气有限责任公司 | Three-phase inverter voltage phase sequence detection circuit, device and method |
| CN112924768A (en) * | 2021-03-25 | 2021-06-08 | 河北衡丰发电有限责任公司 | Three-phase motor phase sequence detection device and method based on signal amplification |
-
2014
- 2014-05-21 CN CN201420261550.4U patent/CN203838315U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969582A (en) * | 2014-05-21 | 2014-08-06 | 中国化学工程第十一建设有限公司 | Phase sequence and steering measuring method and device for three-phase motor |
| CN103969582B (en) * | 2014-05-21 | 2016-05-18 | 中国化学工程第十一建设有限公司 | A kind of three-phase electric machine phase sequence with turn to assay method and device |
| CN105337554A (en) * | 2015-11-18 | 2016-02-17 | 南车青岛四方机车车辆股份有限公司 | Steering judging system and method of motor train unit traction electric machine |
| CN105337554B (en) * | 2015-11-18 | 2018-02-27 | 中车青岛四方机车车辆股份有限公司 | The steering judgement system and method for EMUs traction electric machine |
| CN109507491A (en) * | 2018-10-19 | 2019-03-22 | 陕西航空电气有限责任公司 | Three-phase inverter voltage phase sequence detection circuit, device and method |
| CN112924768A (en) * | 2021-03-25 | 2021-06-08 | 河北衡丰发电有限责任公司 | Three-phase motor phase sequence detection device and method based on signal amplification |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103969582B (en) | A kind of three-phase electric machine phase sequence with turn to assay method and device | |
| CN203838315U (en) | Three-phase motor phase sequence and steering measurement device | |
| CN203688636U (en) | System for detecting voltage of single battery unit of series battery pack | |
| CN103390884B (en) | Power detecting control device and electric power supply control system | |
| CN106249030A (en) | Aerial high-voltage power transmission line electric current on-line monitoring system based on fiber optic communication | |
| CN103353566B (en) | Battery for mimic channel equipment testing circuit in place | |
| CN203981802U (en) | Switch power source adapter automatic testing equipment | |
| CN203849356U (en) | Voltage transformer secondary wire connection inspection device | |
| CN202975123U (en) | Circuit for simultaneous monitoring residual current and breaker work state on same loop | |
| CN202548269U (en) | Polarity discriminating gear for electromagnetic induction coil | |
| CN201673212U (en) | Motor steering test device | |
| CN204376386U (en) | A kind of intelligent low-pressure electromotor integrated protection device of many communication modes | |
| CN205543129U (en) | Battery maintenance appearance based on distribution automation terminal | |
| CN202929178U (en) | Battery measuring plate of intelligent control device | |
| CN203700647U (en) | Detecting system used for small plate and component of electronic jacquard | |
| CN208043989U (en) | Mutual inductor polarity wireless detection device | |
| CN104237824A (en) | Safety gauge calibrating device | |
| CN206470549U (en) | A kind of micro embedded terminal | |
| CN104793108A (en) | Discrete low-voltage failure cable identification device | |
| CN104808115A (en) | Split acquisition terminal for recognition of low-voltage faulted cables | |
| CN204129514U (en) | A kind of detection device for electronic control unit based on FlexRay bus | |
| CN202796000U (en) | Trigger circuit of mining display control box | |
| CN205103339U (en) | Take electrical parameter tester of automatic multistation function | |
| CN204631192U (en) | A kind of separate type low voltage failure cable identification acquisition terminal | |
| CN203672982U (en) | Single-channel optoelectronic coupler testing instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140917 Effective date of abandoning: 20160518 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |