CN203337679U - Static electronic speed measuring device for generator - Google Patents
Static electronic speed measuring device for generator Download PDFInfo
- Publication number
- CN203337679U CN203337679U CN2013203319486U CN201320331948U CN203337679U CN 203337679 U CN203337679 U CN 203337679U CN 2013203319486 U CN2013203319486 U CN 2013203319486U CN 201320331948 U CN201320331948 U CN 201320331948U CN 203337679 U CN203337679 U CN 203337679U
- Authority
- CN
- China
- Prior art keywords
- module
- phase voltage
- generator
- intersection point
- electronic speed
- 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- Withdrawn - After Issue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
Images
Landscapes
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The utility model discloses a static electronic speed measuring device for a generator; the static electronic speed measuring device comprises the following modules: a phase voltage sampling module comprising three sampling circuits respectively connected with three-phase voltage output ends of an auxiliary winding of the generator; an operation amplifier isolation module comprising three operation amplifier circuits respectively connected with output ends of the sampling circuits; a three-phase voltage intersection point sampling module comprising six sampling circuits used for obtaining voltage signals of six intersection points of the three-phase voltage in one period; a shaping filtering module used for shaping and filtering a simulation level after the intersection points are taken; a digital signal processor used for outputting rotation speed according to the signals transmitted by the shaping filtering module; a power module. The static electronic speed measuring device needs not to be arranged on an output shaft of the generator, only the three-phase output voltage signals of the generator are measured to obtain the rotation speed of the generator, and the static electronic speed measuring device is less affected by environment, easy in installation and maintenance, low in cost, and low in failure rate.
Description
Technical field
The utility model relates to a kind of speed measuring device, in particular for the state type electronic speed-determination device of generator.
Background technology
In electricity generation system, the rotating speed that detects generator is very important, and many control methods are all in the enterprising row operation in basis of the actual speed of measuring generator.For example, the maximal power tracing of our generator is controlled all generator speed accurately and is participated in control.Existing generator speed measuring device adopts light code sensor or Hall element to test the speed more, utilizes the physical construction of rotary kinetic measurement, and installation difficulty is large, and failure rate is high, and Long Service Life can subtract greatly, brings great inconvenience to user's maintenance.Take the light code sensor as example; it is by opto-electronic conversion, the geometry of machinery displacement on the magneto output shaft to be converted to the sensor of pulse or digital quantity; it easily is subject to the impact of environment (illumination, dust) in the course of the work; precision is low; the rotary speed unstabilization measured is fixed; cause power given that disturbance is arranged, even lose the generator speed signal and shut down.
The utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide the state type electronic speed-determination device for generator.
The technical solution adopted in the utility model is: the state type electronic speed-determination device for generator comprises:
The phase voltage sampling module, comprise three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively;
The amplifier isolation module, comprise three discharge circuits that are connected with described sample circuit output terminal respectively, for sampled voltage operation amplifier and the isolation to the phase voltage sampling module;
Three-phase voltage intersection point sampling module, comprise six sample circuits, and described sample circuit is for obtaining the voltage signal of six intersection points of three-phase voltage in one-period;
The shaping filter module, for analog level shaping, the filtering to after the taking-up intersection point;
Digital signal processor, for the signal output speed according to the transmission of shaping filter module;
Power module, be used to amplifier isolation module, three-phase voltage intersection point sampling module, shaping filter module, digital signal processor that the voltage input is provided.
The input signal of described sample circuit is any two phase signals in the three-phase voltage of amplifier isolation module output, exports output high level signal when described any two-phase signal level equates to control for the comparison by operational amplifier.
Be in series with level switch module between described three-phase voltage intersection point sampling module and shaping filter module, changed for the incoming level by three-phase voltage intersection point sampling module, described three-phase voltage intersection point sampling module is powered by power module.
Be in series with the light-coupled isolation module between described level switch module and shaping filter module, described light-coupled isolation module is powered by power module.
Described digital signal processor comprises A/D analog to digital converter, dsp processor, host computer, described A/D analog to digital converter is for being converted into digital signal by the analog output signal of shaping filter module, the digital signal that described dsp processor transforms according to the A/D analog to digital converter tests out rotating speed, and described host computer is for showing rotating speed.
A kind of speed-measuring method of the electronic speed-determination of the state type for generator device, the described electronic speed-determination of the state type for generator device comprises: the phase voltage sampling module comprises three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively; The amplifier isolation module, comprise three discharge circuits that are connected with described sample circuit output terminal respectively, for sampled voltage operation amplifier and the isolation to the phase voltage sampling module; Three-phase voltage intersection point sampling module, comprise six sample circuits, and described sample circuit is for obtaining the voltage signal of six intersection points of three-phase voltage in one-period; The shaping filter module, for analog level shaping, the filtering to after the taking-up intersection point; Digital signal processor, for the signal output speed according to the transmission of shaping filter module; Power module, be used to amplifier isolation module, three-phase voltage intersection point sampling module, shaping filter module, digital signal processor that the voltage input is provided; It is characterized in that: comprise the following steps: the three-phase output voltage signal that A) by the phase voltage sampling module, gathers generator; B) the three-phase voltage signal amplifier isolation of amplifier isolation module to collecting; C) obtain the voltage signal of six intersection points of three-phase voltage in one-period by three-phase voltage intersection point sampling module; D) the shaping filter module is to taking out analog level shaping, the filtering after intersection point; E) digital signal processor is according to the signal output speed after shaping filter.
Described step C adjusts amplitude the laggard line level conversion of voltage signal of obtaining six intersection points of three-phase voltage in one-period.
Described step C adopts light-coupled isolation to promote transmission speed after level conversion.
Described step D comprises: D1) input pulse; D2) regulating impulse; D3) reverse shaped pulse; D4) pulse bandwidth filtering; D5) output direct current.
Described step e comprises: E1) input direct-current; E2) simulating signal of input is carried out to analog to digital conversion; E3) carry out output speed according to the digital signal input speed function after conversion; E4) show rotating speed.
The beneficial effects of the utility model:
The utility model is for the state type electronic speed-determination device of generator, on the output shaft that is arranged on generator, only need the three-phase output voltage signal of measuring generator just can measure the rotating speed of generator, it is a kind of static electronics speed measuring device, be subject to the impact of environment less, I&M is easy, and cost is low, failure rate is low.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Fig. 1 is functional block diagram of the present utility model;
Fig. 2 is digital signal processor module frame chart of the present utility model;
Fig. 3 is the circuit diagram of phase voltage sampling module;
Fig. 4 is the circuit diagram of amplifier isolation module;
Fig. 5 is the circuit diagram of three-phase voltage intersection point sampling module;
Fig. 6 is the circuit diagram of level switch module;
Fig. 7 is the circuit diagram of light-coupled isolation module;
Fig. 8 is the circuit diagram of shaping filter module;
Fig. 9 is the process flow diagram of shaping filter module;
Figure 10 is the process flow diagram of digital signal processor module;
Figure 11 is the circuit diagram of power module.
Embodiment
The utility model tests the speed for the rotor of generator, and the rotating speed of generator is calculated in the variation based on its three-phase output voltage signal, and the cardinal principle of foundation is as follows:
1.y1＝sin(ωx)；
2.y1＝sin(ωx+2*π/3)；
3.y1＝sin(ωx+4*π/3)；
Above three functional expressions that formula is three-phase voltage, get 0～2* π with the scope of x, it is example that ω gets 100* π, and top three formula are obtained to intersection point in twos, i.e. 1 and 2 intersection point, 1: 3 intersection point, 2 and 3 intersection point.
Result is π/6,3* π/6,5* π/6,7* π/6,9* π/6,11* π/6.When the frequencies omega of three-phase voltage changes, intersection point also changes according to a certain percentage, frequencies omega and rotation speed n one-to-one relationship, and its relational expression:
?
wherein, the number of pole-pairs that p is synchronous generator.
Otherwise, when intersection point (frequencies omega) changes, the rotation speed n of generator also changes thereupon.
Shown in Fig. 1-Figure 11, the state type electronic speed-determination device for generator comprises:
Phase voltage sampling module 1, comprise three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively;
Three-phase voltage intersection point sampling module 3, comprise six sample circuits, and described sample circuit is for obtaining the voltage signal of six intersection points of three-phase voltage in one-period; Wherein, the input signal of sample circuit is any two phase signals in the three-phase voltage of amplifier isolation module 2 outputs, for the comparison by operational amplifier and integrating circuit combination, output signal is controlled output high level pulse signal when described any two-phase signal level equates;
For adjusting output amplitude, be in series with level switch module 7 between three-phase voltage intersection point sampling module 3 and shaping filter module 4, for the incoming level of three-phase voltage intersection point sampling module 3 is converted to 24V by 15V, three-phase voltage intersection point sampling module 3 is by power module 6 power supplies.
In addition, between level switch module 7 and shaping filter module 4, be in series with light-coupled isolation module 8, to improve transmission speed, light-coupled isolation module 8 is by power module 6 power supplies.
As shown in Figure 8, shaping filter module 4 is provided with turnable pulse width resistance to regulate input pulse.
As shown in Figure 2, digital signal processor 5 comprises A/D analog to digital converter 51, dsp processor 52, host computer 53, A/D analog to digital converter 51 is converted into digital signal for the analog output signal by shaping filter module 4, the digital signal that dsp processor 52 transforms according to A/D analog to digital converter 51 tests out rotating speed, and host computer 53 is for showing rotating speed.
A kind of speed-measuring method of the electronic speed-determination of the state type for generator device, the described electronic speed-determination of the state type for generator device comprises: phase voltage sampling module 1 comprises three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively; Amplifier isolation module 2, comprise three discharge circuits that are connected with described sample circuit output terminal respectively, for sampled voltage operation amplifier and the isolation to phase voltage sampling module 1; Three-phase voltage intersection point sampling module 3, comprise six sample circuits, and sample circuit is for obtaining the voltage signal of six intersection points of three-phase voltage in one-period; Shaping filter module 4, for analog level shaping, the filtering to after the taking-up intersection point; Digital signal processor 5, for the signal output speed according to 4 transmission of shaping filter module; Power module 6, be used to amplifier isolation module 2, three-phase voltage intersection point sampling module 3, shaping filter module 4, digital signal processor 5 that the voltage input is provided; Comprise the following steps: the three-phase output voltage signal that A) by phase voltage sampling module 1, gathers generator; B) the three-phase voltage signal amplifier isolation that 2 pairs of amplifier isolation modules collect; C) obtain the voltage signal of six intersection points of three-phase voltage in one-period by three-phase voltage intersection point sampling module 3; D) analog level shaping, the filtering after 4 pairs of taking-up intersection points of shaping filter module; E) digital signal processor 5 is according to the signal output speed after shaping filter.
As the further optimization of the technical program, step C adjusts amplitude the laggard line level conversion of voltage signal of obtaining six intersection points of three-phase voltage in one-period.
As the further optimization of the technical program, step C adopts light-coupled isolation to promote transmission speed after level conversion.
As shown in Figure 9, step D comprises: D1) input pulse; D2) regulating impulse; D3) reverse shaped pulse; D4) pulse bandwidth filtering; D5) output direct current 0～10v.
As shown in figure 10, step e comprises: E1) input 0-10v direct current signal; E2) simulating signal of input is carried out to analog to digital conversion digital signal (sexadecimal 0000～7FFF); E3) carry out output speed according to the digital signal input speed function after conversion; E4) show rotating speed.
Wherein, step e 3 is asked the Rotation Process foundation
Wherein, n is rotating speed, the result that the AD value is 51 outputs of A/D analog to digital converter.
The range of the A/D analog to digital converter 51 that the present embodiment is used is 65535, and voltage is 20V.
Its corresponding relation is as follows:
0～32767：0V～+10V；
32768～65535：-10V～0V；
2.73 to be voltage turn with the relation of rotating speed: 10V corresponding 27.3 (this relation is to be worth by the swept resistance in regulating circuit, can be other value, and here we are fixing this value, thus the relation be fixed).
Such as: the AD value is 10000,
The utility model is for state type electronic speed-determination device and the method for testing thereof of generator, on the output shaft that is arranged on generator, only need the three-phase output voltage signal of measuring generator just can measure the rotating speed of generator, it is a kind of static electronics method of testing, be subject to the impact of environment less, I&M is easy, and cost is low, failure rate is low.
The foregoing is only preferential embodiment of the present utility model, the utility model is not limited to above-mentioned embodiment, as long as within realizing that with basic identical means the technical scheme of the utility model purpose all belongs to protection domain of the present utility model.
Claims (5)
1. for the state type electronic speed-determination device of generator, it is characterized in that comprising:
Phase voltage sampling module (1), comprise three sample circuits that are connected with generator auxiliary winding three-phase voltage output terminal respectively;
Amplifier isolation module (2), comprise three discharge circuits that are connected with described sample circuit output terminal respectively, for sampled voltage operation amplifier and the isolation to phase voltage sampling module (1);
Three-phase voltage intersection point sampling module (3), comprise six sample circuits, and described sample circuit is for obtaining the voltage signal of six intersection points of three-phase voltage in one-period;
Shaping filter module (4), for analog level shaping, the filtering to after the taking-up intersection point;
Digital signal processor (5), for the signal output speed according to shaping filter module (4) transmission;
Power module (6), be used to amplifier isolation module (2), three-phase voltage intersection point sampling module (3), shaping filter module (4), digital signal processor (5) that the voltage input is provided.
2. the electronic speed-determination of the state type for generator device according to claim 1, it is characterized in that: the input signal of described sample circuit is any two phase signals in the three-phase voltage through amplifier isolation module (2) output, export output high level signal when described any two-phase signal level equates to control for the comparison by operational amplifier.
3. the electronic speed-determination of the state type for generator device according to claim 1, it is characterized in that: between described three-phase voltage intersection point sampling module (3) and shaping filter module (4), be in series with level switch module (7), for the incoming level of three-phase voltage intersection point sampling module (3) is changed, described three-phase voltage intersection point sampling module (3) is powered by power module (6).
4. the electronic speed-determination of the state type for generator device according to claim 3, it is characterized in that: be in series with light-coupled isolation module (8) between described level switch module (7) and shaping filter module (4), described light-coupled isolation module (8) is powered by power module (6).
5. the electronic speed-determination of the state type for generator device according to claim 1, it is characterized in that: described digital signal processor (5) comprises A/D analog to digital converter (51), dsp processor (52), host computer (53), described A/D analog to digital converter (51) is converted into digital signal for the analog output signal by shaping filter module (4), the digital signal that described dsp processor (52) transforms according to A/D analog to digital converter (51) tests out rotating speed, and described host computer (53) is for showing rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203319486U CN203337679U (en) | 2013-06-08 | 2013-06-08 | Static electronic speed measuring device for generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203319486U CN203337679U (en) | 2013-06-08 | 2013-06-08 | Static electronic speed measuring device for generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203337679U true CN203337679U (en) | 2013-12-11 |
Family
ID=49706346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203319486U Withdrawn - After Issue CN203337679U (en) | 2013-06-08 | 2013-06-08 | Static electronic speed measuring device for generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203337679U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323617A (en) * | 2013-06-08 | 2013-09-25 | 广东明阳龙源电力电子有限公司 | Static electronic speed testing device and method for generator |
| CN114167074A (en) * | 2021-11-26 | 2022-03-11 | 中国人民解放军海军工程大学 | System and method for measuring rotating speed of synchronous alternating-current generator |
-
2013
- 2013-06-08 CN CN2013203319486U patent/CN203337679U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323617A (en) * | 2013-06-08 | 2013-09-25 | 广东明阳龙源电力电子有限公司 | Static electronic speed testing device and method for generator |
| CN103323617B (en) * | 2013-06-08 | 2015-03-11 | 广东明阳龙源电力电子有限公司 | Static electronic speed testing device and method for generator |
| CN114167074A (en) * | 2021-11-26 | 2022-03-11 | 中国人民解放军海军工程大学 | System and method for measuring rotating speed of synchronous alternating-current generator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102914665B (en) | Motor revolving speed measurement and fault state detection system | |
| CN103558003B (en) | A kind of rotor torsion oscillation excitation and vibration analysis experimental system | |
| CN103439907B (en) | Multi signal collection test the speed and reversal protection control device and reversion decision method | |
| CN104079193A (en) | Device for direct current component adjustment and control method thereof | |
| CN203337679U (en) | Static electronic speed measuring device for generator | |
| CN203587701U (en) | Online detection circuit for photovoltaic inverter ground insulation resistance | |
| CN103323617B (en) | Static electronic speed testing device and method for generator | |
| CN204283625U (en) | Gas turbine rotary speed conditioning module | |
| CN204216805U (en) | Brushless DC motor without position sensor phase compensation device | |
| CN103323680A (en) | Device for capacitance detection and balanced configuration of capacitor bank | |
| CN102324888A (en) | DSP based vector control system for variable-speed constant-frequency double-feed wind driven generator | |
| CN102004165A (en) | Method for measuring instantaneous rotation speed of synchronous generator | |
| CN103852623A (en) | Voltage and current collecting device for capacitive photovoltaic cell | |
| CN203422633U (en) | Multi-signal acquisition velocity measurement and reverse rotation protection control device | |
| CN203489914U (en) | A wind-driven generator parameter integrated monitoring apparatus based on a STD bus | |
| CN104132684B (en) | A kind of increment type grating encoder zero signal detection method | |
| CN102749523A (en) | Direct-current ground resistance detection circuit applied to photovoltaic inverter system | |
| CN203759092U (en) | Capacitive photovoltaic cell voltage and current acquisition device | |
| CN206942939U (en) | A kind of wind power generating set wheel speed measuring system | |
| CN202939246U (en) | Device for carrying out power generation efficiency comparison test on inclined single-shaft tracking bracket and fixing bracket | |
| CN204881845U (en) | Multichannel wind turbine generator system vibrates data acquisition system based on STM | |
| CN203688649U (en) | Industrial three-phase isolation ammeter | |
| CN203981762U (en) | Based on the thin-film electro weak point test voltage display system of AD module output | |
| CN203204078U (en) | Test system for measuring earth grounding resistance | |
| CN202421322U (en) | Confluence monitoring device with temperature compensation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131211 Effective date of abandoning: 20150311 |
|
| RGAV | Abandon patent right to avoid regrant |