CN104201902A - Congruent power and timing signals used for equipment - Google Patents
Congruent power and timing signals used for equipment Download PDFInfo
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- CN104201902A CN104201902A CN201410456756.7A CN201410456756A CN104201902A CN 104201902 A CN104201902 A CN 104201902A CN 201410456756 A CN201410456756 A CN 201410456756A CN 104201902 A CN104201902 A CN 104201902A
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Abstract
The invention relates to congruent power and timing signals used for equipment, in particular to congruent power and timing signals in single electronic equipment. In one embodiment, a circuit can comprise an isolation transformer only, and the isolation transformer can be operated to generate power signals and timing signals. On a secondary-level side, two branches can extract both the power signals and the timing signals to be used in an isolated circuit on the secondary-level side. The first branch can be coupled to the transformer and can be operated to control signals to be power signals like 5V direct-current signals. Similarly, the second circuit branch can be operated to control the signals to be clock signals like 5V signals with frequency of 1MHz. The power signals and the clock signals are extracted from the same isolation transformer on the secondary-level side, so that precious time can be saved on integrated circuit equipment when only a winding used for a single isolation transformer is provided.
Description
Technical field
The application is to be dividing an application of December 30, application number in 2010 are 201010624752.7, denomination of invention is " for the power being harmonious and the timing signal of equipment " application for a patent for invention the applyings date.The present invention relates to produce circuit and method and the three-phase measuring system of power and timing signal.
Background technology
System and equipment often rely on two kinds of signals to operate.Power signal can be for providing power signal, logical signal and the control signal in system or equipment.In addition, can also trigger, handle or otherwise various parts and the circuit of control system or equipment by timing signal or clock signal.Therefore, these two kinds of signals can correspondingly be used together.
Many times, the above-mentioned signal providing from system or equipment outside may be provided system or equipment.That is to say, power signal and/or clock signal can be from the circuit of system or equipment outside.For example, when monitoring overhead power line, for the equipment of monitoring, can directly from power circuit itself, obtain electric power.Similarly, in having the equipment of a plurality of integrated circuits (IC) chip or a plurality of discrete printed circuit board (PCB) (PCB), single clock source can provide timing signal for all parts in equipment.In addition,, when these signals are from IC, PCB or specific separate devices when outside, these signals may need before using in these parts to isolate.Therefore, power signal and timing signal may, for the isolating transformer of every kind of signal, be used to provide on the signal feed of isolation.For these two groups of signals provide two isolating transformers, be heaviness and poor efficiency.
Summary of the invention
According to an aspect of the present disclosure, a kind of circuit is provided, it comprises: transformer, can operate the signal through isolation that is received from signal source in order to produce; The first circuit branch, is coupled to described transformer and can operates in order to being power signal by described signal manipulation; And second circuit branch, be coupled to described transformer and can operate in order to being clock signal by described signal manipulation.
According to another aspect of the present disclosure, a kind of three-phase measuring system is provided, it comprises: at least three voltage sensors, can operate in order to the signal producing with the voltage in is mutually directly proportional accordingly; At least three current sensors, can operate in order to the signal producing with the electric current in is mutually directly proportional accordingly; And at least three measuring circuits, be coupled to respectively associated phase voltage transducer and phase current transducer.Each measuring circuit comprises: transformer, can operate the signal through isolation that is received from signal source in order to produce; The first circuit branch, is coupled to described transformer and can operates in order to being power signal by described signal manipulation; And second circuit branch, be coupled to described transformer and can operate in order to being clock signal by described signal manipulation.
According to another aspect of the present disclosure, a kind of method is provided, it comprises: the primary side at transformer receives initialize signal; Primary side at described transformer is extracted the power signal being directly proportional to described initialize signal; And extract in the primary side of described transformer the clock signal being directly proportional to described initialize signal.
According to another aspect of the present disclosure, a kind of method being used in integrated circuit is provided, comprise: by a transformer conversion initialize signal, described initialize signal has the first voltage and first frequency, and is converted into the power signal with second voltage and zero frequency; And by described transformer, described initialize signal is converted to the clock signal with tertiary voltage and second frequency.
Accompanying drawing explanation
The execution mode of theme disclosed herein will become distincter and become with reference to following detailed description in detail in conjunction with the drawings and better be understood.
Fig. 1 is for being used two different isolating transformers that the block diagram of the conventional system of power signal and timing signal is provided to equipment.
Fig. 2 for according to theme disclosed herein execution mode, use an isolating transformer that the block diagram of the system of power signal and timing signal is provided to equipment.
Fig. 3 for according to theme disclosed herein execution mode, each equipment uses an isolating transformer that the block diagram of the system of power signal and timing signal is provided to the equipment of three-phase electrical power system.
Embodiment
Below discuss and propose in order to make those skilled in the art make and to use theme disclosed herein.General Principle described herein can be applied to other execution modes and the application except the above execution mode describing in detail and application in the situation that do not deviate from spirit and the scope of current embodiment.Current disclosure is not intended to be limited to the execution mode illustrating, but should meet with principle and the consistent wide as far as possible scope of feature disclosed herein or suggestion.
Before the detail of various execution modes is discussed, introduce the general introduction of an execution mode of theme.Electronic circuit may often be used two kinds of signals---power signal and clock signal as discussed above.According to the various execution modes below discussed, can use individual signals via single isolating transformer to circuit provide power signal and clock signal the two.In one embodiment, an integrated circuit can comprise an only isolating transformer, and it can operate in order to the generation of level side is through the signal of isolation secondarily, and this signal through isolation is directly proportional to the initialize signal that is received from signal source.In primary side, Liang Ge branch can extract power signal and clock signal subsequently, for the circuit in segregate primary side, uses.Transformer can be coupled in the first branch, and can operate in order to be power signal by signal manipulation, such as 5V direct current signal.Similarly, second circuit branch can operate in order to be clock signal by signal manipulation, such as having the 5V signal of 1MHz frequency.By extracting power signal and clock signal in primary side from same isolating transformer, can in integrated device electronics, save valuable space because of only having for the single winding of single isolating transformer.The these and other aspects of described execution mode will be discussed in more detail hereinafter.
Fig. 1 is for being used two different isolating transformers that the block diagram of the conventional system of power signal and timing signal is provided to equipment.In this system 100, clock source 110 (can in IC, PCB or equipment 105 outsides) can provide to the primary side of the first isolating transformer 111 initial clock signal.Isolating transformer is converted into secondary side signals by this signal subsequently, and this secondary side signals is for providing clock signal clk to IC 105 (hereinafter, mention IC 105 and be interpreted as representing IC, PCB or miscellaneous part/equipment).The primary side of the first isolating transformer 111 is also coupled to ground potential GND.
Similarly, still individually, power source 120 (may be outside equally) can provide power signal to the primary side of the second isolating transformer 121.The second isolating transformer subsequently secondarily level side on transfer power signal, so that such power signal Vcc to be provided to IC 105.With the same before, the primary side of the second isolating transformer 121 also can be coupled to ground potential GND.
By this way, power signal Vcc and clock signal clk both produce in IC 105 outsides, but in the mode through isolation, offer IC by two different isolating transformers 110 and 120.Yet, with two different isolating transformers 110 and 120, need more space for the winding of two different transformers.Space may be very precious in less and more efficient equipment, and is a kind of shortcomings for the demand of two groups of different Transformer Winding.Yet, as described in about Fig. 2, if clock signal " can be born to (piggy-back) " on power signal, can only need single isolating transformer so.
Fig. 2 for according to theme disclosed herein execution mode, use an isolating transformer that the block diagram of the circuit 200 of power signal and timing signal is provided to equipment.In this embodiment, power/clock source 225 can provide the signal with characteristic frequency and amplitude.Suitable frequency can be 12V for 1MHz and suitable voltage amplitude.For example, due to public power possibility different (, North America standard is 120V and 60Hz), can be according to obtaining such 12V, 1MHz signal for changing the frequency of signal and the conventional solution of voltage amplitude.In this example and hereinafter in the example about Fig. 3, primary signal may be for having the original frequency of 60Hz and the common power line power supply of 240V.So conventional maneuverability pattern to voltage signal is discussed in this article no longer in further detail.
Power/clock source 225 provides signal to the primary side of single isolating transformer 230.Isolating transformer 230 subsequently secondarily level a winding produce almost identical signal because isolating transformer has the winding of equal number in each side.Initial 12V, 1MHz signal are by filtering capacitor 250, to filter any low side (low-end) transition.After this initial filtering, one of can be in two ways handle vibration (and now through filtering) signal, with to parts 205 transmission clock signals or to parts 205 delivering power signals.
In situation about handling at power signal, circuit comprises Zener diode (zener diode) 253, and it is connected between the output and ground potential GND of filtering capacitor.The size of Zener diode 253 is set so that the voltage amplitude clamper of the signal at node 260 places at 5V.Circuit also comprises rectifier diode 252 subsequently, and it carries out rectification to the signal through clamper, with the Vcc node to parts 205, provides DC power supply voltage.This DC power supply voltage carries out filtering for the second time by filtering capacitor 255, to remove any high-frequency instantaneous variation.Therefore, through the 5V of filtering, rectification and clamper power signal, be sent to Vcc.
In the situation that clock signal is handled, Zener diode 253 as above by the signal clamper at node 260 places at 5V.Node 260 is coupled to the input end of clock CLK of parts 205 by impedance 251.The large I of this impedance 251 is set so that further to reduce its voltage when clock signal enters clock node.In addition, without any rectification, the frequency of clock signal is identical by the frequency of the initial power/clock signal of the secondary winding with from isolating transformer 230.
Such solution is favourable, because can obtain clock signal clk and power signal Vcc from the individual signals through single isolating transformer 230.Due to the winding quantity of the minimizing in single transformer, so only there is single isolating transformer 230, space required in equipment or on IC or PCB will be reduced.When IC space is very precious, the obvious advantage that provides is provided such winding space.Therefore, circuit 200 can be a part for the larger system below discussed about Fig. 3.
Fig. 3 for according to theme disclosed herein execution mode, each equipment uses an isolating transformer that the block diagram of the system 300 of power signal and clock signal is provided to the measuring equipment of three-phase electrical power system.Such system 300 can be used in the environment of three-phase power distribution system.For example, system 300 can comprise one group of power circuit, and it has four conductors: A phase 310a, B phase 310b, C phase 310c and neutrality (neutral) conductor 310n.Many times, it may be useful knowing the voltage and current characteristic that each conductor in these conductors puts at any time.Therefore, each conductor can be coupled to Special electric flow sensor 320a-c and specialized voltages transducer 321a-c the two.
So in the system of Fig. 3, A phase 310a can be coupled to the first voltage sensor 321a and the first current sensor 320a.Similarly, B phase 310b can be coupled to second voltage transducer 321b and the second current sensor 320b, as C phase 310c can be coupled to tertiary voltage transducer 321c and the 3rd current sensor 320c.Those skilled in the art should be understood that: each transducer in these transducers can comprise for producing into the circuit of the signal being directly proportional to voltage and current on conductor, because directly process so large voltage and current, may be dangerous.Therefore, these values are converted into and are more adapted at the signal that uses in circuit 302a-c.
In the execution mode of this system 300, can be from single source to several equipment and/or parts power supply, this single source can be may not be also same circuits in this system and/or a part of IC.At this, four different circuit have been shown in the system 300 of Fig. 3.The first circuit 340 can be used to provide common power/clock signal to each circuit in other three circuit 302a-c.Each circuit in these three circuit 302a-c can comprise the circuit 200 shown in Fig. 2.By this way, can provide single power/clock signal to each circuit 302a-c, make each circuit only include an isolating transformer.In addition, each circuit in these circuit 302a-c can be coupled to corresponding current sensor 320a-c and corresponding voltage sensor 321a-c, to receive the measuring-signal from the practical conductor 310a-c of three-phase electrical power system.
The first circuit 340 can be coupled to the voltage source that produces power signal for initial.In one embodiment, this power supply can be one of power circuit in described power circuit; As shown in the figure, circuit 340 is coupled to the voltage sensor 321c for C phase 310c.In other embodiments, this primary power can be battery or other suitable power supplys.So circuit 340 can be handled initial power signal, to provide suitable power/clock signal to other three circuit 302a-c.In addition, the first circuit can comprise processor 390, and it can operate the data that reclaim in order to other circuit based on from system and carry out calculating.And in addition, the data that calculate can be stored in memory 391.
Therefore, power/clock signal is initially provided with the clock signal of 1MHz frequency, and it will have relatively low amplitude.This signal is regulated by impedance 331.So, by this clock signal, drive the switching transistor 330 that 12 volts of supply voltages of the primary side of each isolating transformer by for each related circuit 302a-c is carried out to switch, rather than this clock signal directly offered to three circuit 302a-c.In addition, filtering capacitor filters low frequency transition.By this way, each circuit has been provided the power/clock signal with 12V voltage and 1MHz frequency.
This circuit 340 for generation of power/clock signal can be other configurations.Can produce this power/clock signal with any circuit that can produce the oscillator signal with specific voltage amplitude and frequency.In addition, in the primary side of each isolating transformer, can arrange drive IC supply voltage with the filtering of any type.Again in addition, also can carry out recovered clock signal with the independent filtering of any type, for using on IC.
Producing a certain alternative technology for power/clock signal, can be the circuit having from the feedback signal of the primary side of each circuit 302a-c.Such feedback signal will postback by corresponding isolating transformer, but can be subsequently for modulating the duty ratio of initial clock signal.For example, by maintaining the frequency (, the leading edge of pulse still occurs with 1MHz frequency) of initial clock signal, people can modulation duty cycle, for example, to modulate the power (, the length of each pulse can change) of transmission.
In the environment of the system of Fig. 3, people can measure with three circuit 302a-c electric current and the voltage characteristic of each phase 310a-c.Each circuit in these circuit 302a-c can comprise IC (such as from 205 in Fig. 2), described IC can comprise delta modulator (Sigma Delta modulator), and described delta modulator can be for the electric current in the specific phase of sensing power supply and voltage.So for example, in the situation of three phase mains, people can use the information of collecting from these circuit 302a-c reading based on each phase to calculate whole power consumption.If people are coupling sensor (not shown) herein also, can also collect extra information from neutral conductor 310n so.
Each circuit in circuit 340 and 302a-c and transducer 320a-c and 321a-c can be contained in individual equipment, in power meter.Alternatively, transducer 320a-c and 321a-c can be contained in discrete special equipment, and described special equipment can be positioned at the place near conductor 310a-c, makes to only have little measuring-signal to be sent to the separate devices of the additional circuit of the system of accommodating 300.And in addition, all circuit of describing in the system of Fig. 3 can occupy on single IC.
Shown in the drawings and describe hereinbefore the execution mode of some examples explanation of theme discussed in this article in detail, it is easy to make and improves and alternate configuration simultaneously.Yet, it should be understood that us and unintentionally claim be limited in to particular forms disclosed, and antithesis, all marrow and the improvement in scope, alternate configuration and equivalents that belong to claim are contained in our being intended that.
Claims (4)
1. be used in the method in integrated circuit, comprise:
By a transformer conversion initialize signal, described initialize signal has the first voltage and first frequency, and is converted into the power signal with second voltage and zero frequency; And
By described transformer, described initialize signal is converted to the clock signal with tertiary voltage and second frequency.
2. according to the process of claim 1 wherein that described initialize signal is converted to power signal also to be comprised: the initialize signal with 12V voltage and 1MHz frequency is converted to the power signal with 5V voltage and zero frequency.
3. according to the process of claim 1 wherein that described initialize signal is converted to clock signal also to be comprised: the initialize signal with 12V voltage and 1MHz frequency is converted to the clock signal with 5V voltage and 1MHz frequency.
4. according to the method for claim 1, also comprise described power signal is carried out to filtering, to remove high-frequency instantaneous variation and low frequency transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456756.7A CN104201902A (en) | 2010-12-30 | 2010-12-30 | Congruent power and timing signals used for equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456756.7A CN104201902A (en) | 2010-12-30 | 2010-12-30 | Congruent power and timing signals used for equipment |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010624752.7A Division CN102570842B (en) | 2010-12-30 | 2010-12-30 | Three-phase power system and other methods |
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| Publication Number | Publication Date |
|---|---|
| CN104201902A true CN104201902A (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410456756.7A Pending CN104201902A (en) | 2010-12-30 | 2010-12-30 | Congruent power and timing signals used for equipment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6407691B1 (en) * | 2000-10-18 | 2002-06-18 | Cirrus Logic, Inc. | Providing power, clock, and control signals as a single combined signal across an isolation barrier in an ADC |
| CN2520081Y (en) * | 2001-12-28 | 2002-11-06 | 联想(北京)有限公司 | Power source for coordinate circuit of data interface of external modem |
| CN101156075A (en) * | 2005-04-07 | 2008-04-02 | Abb专利有限公司 | Device for supplying power to measuring sensors and transmitting a synchronous clock signal thereto |
| CN201466991U (en) * | 2009-05-15 | 2010-05-12 | 中北大学 | Multi-channel isolation direct-current power generator |
-
2010
- 2010-12-30 CN CN201410456756.7A patent/CN104201902A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6407691B1 (en) * | 2000-10-18 | 2002-06-18 | Cirrus Logic, Inc. | Providing power, clock, and control signals as a single combined signal across an isolation barrier in an ADC |
| CN2520081Y (en) * | 2001-12-28 | 2002-11-06 | 联想(北京)有限公司 | Power source for coordinate circuit of data interface of external modem |
| CN101156075A (en) * | 2005-04-07 | 2008-04-02 | Abb专利有限公司 | Device for supplying power to measuring sensors and transmitting a synchronous clock signal thereto |
| CN201466991U (en) * | 2009-05-15 | 2010-05-12 | 中北大学 | Multi-channel isolation direct-current power generator |
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