CN105510677A - Universal three-phase electricity collecting equipment and system - Google Patents
Universal three-phase electricity collecting equipment and system Download PDFInfo
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- CN105510677A CN105510677A CN201610028890.6A CN201610028890A CN105510677A CN 105510677 A CN105510677 A CN 105510677A CN 201610028890 A CN201610028890 A CN 201610028890A CN 105510677 A CN105510677 A CN 105510677A
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- phase electricity
- mutual inductor
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- 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
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
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Abstract
The invention discloses universal three-phase electricity collecting equipment and system. The universal three-phase electricity collecting equipment comprises a sampling circuit, an amplification circuit, a shaping circuit and a collecting circuit, wherein the sampling circuit is used for receiving current signals from a mutual inductor, converting the current signals into voltage signals and transmitting the voltage signals to the amplification circuit; the amplification circuit is used for amplifying the received voltage signals, and regulating the voltage signals to the preset voltage range; the shaping circuit is used for converting the regulated voltage signals into square wave signals so as to determine the frequency of the current signals; the sampling circuit is used for collecting the regulated voltage signals so as to determine the amplitude value of the current signals. The invention also provides a universal three-phase electricity collecting system, which comprises a mutual inductor, a controller and the universal three-phase electricity collecting equipment. The universal three-phase electricity collecting equipment and system provided by the invention have the characteristics of high universality, small size, low power consumption, high stability and the like, and are suitable for being used in various occasions.
Description
Technical field
The disclosure relates to genset automatic control technology field in Ship Power Station, particularly relates to a kind of universal three-phase electricity collecting device and system.
Background technology
Along with the development of larger-sized vessel, multifunction and energy-saving, more and more higher to the requirement of Ship Electrical Power System.Ship Electrical Power System is one of most important system of boats and ships, the quality of Ship Electrical Power System is directly connected to continuity, economy, the quality of power supply of power station power supply, ensure that marine electric installation works safely and reliably, and then guarantee boats and ships, Cargo On Deck and personal security.
Ship Electrical Power System forms primarily of power supply, power distribution equipment, power network and consumer.Power supply adopts genset usually.At present, in Ship Electrical Power System genset electric power acquisition, existing three-phase electricity acquisition module can only gather a kind of signal, can not be applicable to gather the signal changed through Hall mutual inductor or be converted to through magnetoelectricity mutual inductor simultaneously, does not possess versatility.
Summary of the invention
In view of above-mentioned defect of the prior art or deficiency, expect to provide a kind of universal three-phase electricity collecting device and system.
On the one hand, the invention provides a kind of universal three-phase electricity collecting device, comprise: sample circuit, amplifying circuit, shaping circuit and Acquisition Circuit, described current signal, for receiving the current signal from mutual inductor, is converted to voltage signal and described voltage signal is transferred to described amplifying circuit by described sample circuit; The described voltage signal that described amplifying circuit is used for receiving amplifies, and described voltage signal is adjusted to predetermined voltage range; Described shaping circuit is used for the voltage signal after by adjustment and is converted to square-wave signal, for the frequency determining described current signal; And described sample circuit is for gathering the voltage signal after described adjustment, for the amplitude determining described current signal.
On the other hand, present invention also offers a kind of universal three-phase electricity acquisition system, comprise mutual inductor, controller, also comprise above-mentioned universal three-phase electricity collecting device; The output terminal of described mutual inductor connects the input end of described sample circuit, and three phase sine electric signal transfers to described sample circuit through described mutual inductor; The input end of described controller connects the output terminal of described shaping circuit, in order to gather the frequency of described three phase sine electric signal; The input end of described controller connects the output terminal of described sample circuit, in order to gather the amplitude of described three phase sine electric signal.
Universal three-phase electricity collecting device provided by the invention and system, by arranging amplifying circuit so that the signal of input is amplified to predetermined voltage range, can in circuit kit the compatible signal gathering three-phase electricity signal (comprising electric current and voltage) and be converted to through two kinds of mutual inductors (Hall mutual inductor or magnetoelectricity mutual inductor), possess that highly versatile, volume are little, low in energy consumption, stability high, be applicable to the application of various occasion.Further, difference or single-ended input fashion can be selected, effectively to suppress the external disturbance of different occasion.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, the other features, objects and advantages of the application will become more obvious:
Fig. 1 is the theory diagram of universal three-phase provided by the invention electricity acquisition system;
Fig. 2 is the schematic diagram of amplifying circuit provided by the invention;
Fig. 3 is the schematic diagram of sample circuit provided by the invention;
Fig. 4 is the schematic diagram of shaping circuit provided by the invention;
Fig. 5 is the schematic diagram of Acquisition Circuit provided by the invention.
Embodiment
Below in conjunction with drawings and Examples, the application is described in further detail.Be understandable that, specific embodiment described herein is only for explaining related invention, but not the restriction to this invention.It also should be noted that, for convenience of description, illustrate only in accompanying drawing and invent relevant part.
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the application in detail in conjunction with the embodiments.
This application provides a kind of universal three-phase electricity collecting device, with reference to the part in the dotted line frame of figure 1, universal three-phase electricity collecting device 1 comprises: sample circuit 11, amplifying circuit 12, shaping circuit 13 and Acquisition Circuit 14, current signal, for receiving the current signal from mutual inductor, is converted to voltage signal and voltage signal is transferred to amplifying circuit 12 by sample circuit 11; Voltage signal, for amplifying the voltage signal received, is adjusted to predetermined voltage range by amplifying circuit 12; Shaping circuit 13 is for being converted to square-wave signal, for the frequency determining current signal by the voltage signal after adjustment; And sample circuit 14 is for gathering the voltage signal after adjustment, for the amplitude determining current signal.
Amplification process is carried out by the current signal of amplifying circuit self-mutual inductance device in future in the application, different input signals can be changed into the signal in approximate extents, reach and gather compatible object, thus the three-phase electricity collecting device that the application is provided has versatility.
As the optional embodiment of one, amplifying circuit comprises gain selection terminal, for the gain factor different according to the type selecting of mutual inductor.
Further, amplifying circuit comprises: difference amplifier chip, and difference amplifier chip comprises: A
0pin, A
1pin, A
0pin and A
1pin is used as gain selection terminal, under external wire jumper controls, select low power gain or high power gain.As shown in Figure 2, difference amplifier chip is preferably AD8251ARMZ chip, can support the mode of difference or single ended input, wherein A
0pin, A
1pin is gain selection terminal, can be selected the input of Different Logic relation by the control of external wire jumper, thus selects the output of different gains.
Further, in the application, low power gain is 1 times of gain, and high power gain is 8 times of gains, and the maximum output of magnetoelectricity mutual inductor conventional is at present 5mA, and the maximum output of Hall mutual inductor is 30mA; When mutual inductor is Hall mutual inductor, select low power gain; When mutual inductor is magnetoelectricity mutual inductor, select high power gain.
Further, amplifying circuit also comprises: the first low-pass filter circuit be connected with difference amplifier chip rear end, for carrying out low-pass filtering treatment to the voltage signal after adjustment.As shown in Figure 3, AD8251ARMZ chip also comprises OUT pin, the first low-pass filter circuit 101 is connected by OUT pin, first low-pass filter circuit comprises resistance R4 and electric capacity C3, one end of OUT pin contact resistance R4, the other end of resistance R4 connects one end of electric capacity R3, the other end ground connection of electric capacity R3; Wherein, resistance R4 is preferably 330 Ω, and electric capacity C3 is preferably 0.1uF.
As the optional embodiment of one, with reference to figure 3, sample circuit comprises: wire jumper X1, in order to select single-ended or Differential Input mode; And sampling resistor R3, for future, the current signal of self-mutual inductance device is converted to voltage signal.As shown in Figure 3, sample circuit comprises electric current input anode and electric current input negative terminal, and wire jumper is connected on electric current input negative terminal, and when after X1 short circuit, electric current input negativing ending grounding is single-ended input fashion; When X1 disconnects, it is Differential Input mode.Resistance R3 is preferably 200 Ω.
With reference to figure 3, if sample circuit also comprises the electric capacity C1 in parallel with sampling resistor, electric capacity C1 is preferably 0.1uF, and electric capacity C1 is mainly used to filtering high frequency spurs.
As the optional embodiment of one, with reference to Fig. 4, shaping circuit comprises: the second low-pass filter circuit 102, clamp diode V1, zero-crossing comparator and Key dithering resistance R90; Second low-pass filter circuit 102 for receive through amplifying circuit adjustment after voltage signal and carry out low-pass filtering; Clamp diode V1 is for being limited in predetermined current potential by the negative voltage in the voltage signal by the second low-pass filter circuit; Zero-crossing comparator is used for receiving through the filtered voltage signal of the second low-pass filter circuit and carrying out Zero-cross comparator to be converted into square-wave signal; Key dithering resistance R90 is for removing the noise in square-wave signal.
As shown in Figure 4, the second low-pass filter circuit comprises resistance R94 and electric capacity C93, the other end of one end contact resistance R4 of resistance R94, the other end ground connection of electric capacity C93; The anode of clamp diode V1 connects the other end of electric capacity C93, and the negative terminal of clamp diode V1 connects one end of electric capacity C93, by clamp diode V1 by by the negative terminal signal clamper in the voltage signal of the second low-pass filter circuit on-0.7.In addition, zero-crossing comparator is preferably LM339 comparer, when voltage signal is greater than 0V, export high level, when voltage signal is less than 0V, output low level, can be converted into square-wave signal by through the filtered voltage signal of the second low-pass filter circuit like this, and namely corresponding future, the current signal of self-mutual inductance device was converted to the square-wave signal that can be gathered by controller; And a Key dithering resistance R90 in parallel between the in-phase input end and the first output terminal of zero-crossing comparator LM339, in order to remove the noise in square-wave signal.
Further, in order to protect the normal operation of LM339 comparer, between the other end and the in-phase input end of LM339 comparer of resistance R94, be also provided with a resistance, for current limliting step-down, the normal work of protection LM339 comparer.
As the optional embodiment of one, sample circuit comprises: acquisition chip, and acquisition chip is by spi bus connection control device; Acquisition chip has four CONVST pins, for 8 road single ended signal are synchronously converted to 4 road differential input signals.As shown in Figure 5, it is ADS8258 chip that acquisition chip is preferably model, there are CONVST_A, CONVST_B, CONVST_C, CONVST_D tetra-pins, chip ADS8258 has 12BIT precision, 8 road single-point inputs synchronously can be converted to 4 road Differential Input, possess spi bus interface, the requirement of various high precision occasion can be met.Wherein, spi bus interface had both gone for most of controller, can expand multiple equipment easily again, can also maintain original state when system reset; CONVST pin is for controlling conversion pin, and by the control of controller to this pin, can realize 8 roads synchronously changes, and can be convenient to controller to calculate the phase relation of each phase of three-phase electricity.
In addition, with reference to figure 1, present invention also provides a kind of universal three-phase electricity acquisition system, comprise mutual inductor 2, controller 3, and the universal three-phase electricity collecting device of above-mentioned introduction;
Wherein, the output terminal of mutual inductor connects the input end of sample circuit, and three phase sine electric signal transfers to sample circuit through mutual inductor; The input end of controller connects the output terminal of shaping circuit, in order to gather the frequency of three phase sine electric signal; The input end of controller connects the output terminal of sample circuit, in order to gather the amplitude of three phase sine electric signal.
Further, mutual inductor comprises Hall mutual inductor or magnetoelectricity mutual inductor.Three-phase electricity acquisition system provided by the invention, comprising the amplifying circuit that comprises of three-phase electricity collecting device can compatible signal after different mutual inductor conversion, three-phase electricity acquisition system provided by the invention can realize the compatibility collection to two kinds of signals in circuit kit.
More than describe and be only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art are to be understood that, invention scope involved in the application, be not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, also should be encompassed in when not departing from described inventive concept, other technical scheme of being carried out combination in any by above-mentioned technical characteristic or its equivalent feature and being formed simultaneously.The technical characteristic that such as, disclosed in above-mentioned feature and the application (but being not limited to) has similar functions is replaced mutually and the technical scheme formed.
Claims (10)
1. a universal three-phase electricity collecting device, comprising: sample circuit, amplifying circuit, shaping circuit and Acquisition Circuit, is characterized in that,
Described current signal, for receiving the current signal from mutual inductor, is converted to voltage signal and described voltage signal is transferred to described amplifying circuit by described sample circuit;
The described voltage signal that described amplifying circuit is used for receiving amplifies, and described voltage signal is adjusted to predetermined voltage range;
Described shaping circuit is used for the voltage signal after by adjustment and is converted to square-wave signal, for the frequency determining described current signal; And
Described sample circuit for gathering the voltage signal after described adjustment, for the amplitude determining described current signal.
2. universal three-phase electricity collecting device according to claim 1, is characterized in that,
Described amplifying circuit comprises gain selection terminal, for the gain factor different according to the type selecting of mutual inductor.
3. universal three-phase electricity collecting device according to claim 2, is characterized in that,
Described amplifying circuit comprises: difference amplifier chip, and described difference amplifier chip comprises: A
0pin, A
1pin, described A
0pin and described A
1pin is used as described gain selection terminal, under external wire jumper controls, select low power gain or high power gain.
4. universal three-phase electricity collecting device according to claim 3, is characterized in that,
Described low power gain is 1 times of gain, and described high power gain is 8 times of gains;
When mutual inductor is Hall mutual inductor, select described low power gain;
When mutual inductor is magnetoelectricity mutual inductor, select described high power gain.
5. universal three-phase electricity collecting device according to claim 3, is characterized in that,
Described amplifying circuit also comprises: the first low-pass filter circuit be connected with described difference amplifier chip rear end, for carrying out low-pass filtering treatment to the voltage signal after adjustment.
6. universal three-phase electricity collecting device according to claim 1, it is characterized in that, described sample circuit comprises:
Wire jumper, in order to select single-ended or Differential Input mode; And
Sampling resistor, for future, the current signal of self-mutual inductance device is converted to voltage signal.
7. universal three-phase electricity collecting device according to claim 1, is characterized in that,
Described shaping circuit comprises: the second low-pass filter circuit, clamp diode, zero-crossing comparator and Key dithering resistance;
Described second low-pass filter circuit is for the voltage signal that receives after the adjustment of described amplifying circuit and carry out low-pass filtering;
Described clamp diode is for being limited in predetermined current potential by the negative voltage in the voltage signal by described second low-pass filter circuit;
Described zero-crossing comparator is used for receiving through the filtered voltage signal of described second low-pass filter circuit and carrying out Zero-cross comparator to be converted into square-wave signal;
Described Key dithering resistance is for removing the noise in described square-wave signal.
8. universal three-phase electricity collecting device according to claim 1, is characterized in that,
Described sample circuit comprises: acquisition chip, and described acquisition chip is by spi bus connection control device;
Described acquisition chip has four CONVST pins, for 8 road single ended signal are synchronously converted to 4 road differential input signals.
9. a universal three-phase electricity acquisition system, comprises mutual inductor, controller, it is characterized in that, also comprises the universal three-phase electricity collecting device described in any one of claim 1-8;
The output terminal of described mutual inductor connects the input end of described sample circuit, and three phase sine electric signal transfers to described sample circuit through described mutual inductor;
The input end of described controller connects the output terminal of described shaping circuit, in order to gather the frequency of described three phase sine electric signal;
The input end of described controller connects the output terminal of described sample circuit, in order to gather the amplitude of described three phase sine electric signal.
10. universal three-phase electricity acquisition system according to claim 9, it is characterized in that, described mutual inductor comprises Hall mutual inductor or magnetoelectricity mutual inductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610028890.6A CN105510677A (en) | 2016-01-15 | 2016-01-15 | Universal three-phase electricity collecting equipment and system |
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| CN201610028890.6A CN105510677A (en) | 2016-01-15 | 2016-01-15 | Universal three-phase electricity collecting equipment and system |
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| CN105510677A true CN105510677A (en) | 2016-04-20 |
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