CN101373210A - Device for measuring magnetic element loss - Google Patents
Device for measuring magnetic element loss Download PDFInfo
- Publication number
- CN101373210A CN101373210A CNA2007101427841A CN200710142784A CN101373210A CN 101373210 A CN101373210 A CN 101373210A CN A2007101427841 A CNA2007101427841 A CN A2007101427841A CN 200710142784 A CN200710142784 A CN 200710142784A CN 101373210 A CN101373210 A CN 101373210A
- Authority
- CN
- China
- Prior art keywords
- magnetic element
- loss
- power supply
- changeover device
- supply changeover
- 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.)
- Granted
Links
Images
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
The invention discloses a measuring device of the magnetic element loss, which is used for measuring the loss of a magnetic element, wherein the measuring device comprises a power converter connected with a DC power supply and the magnetic element and used for converting the DC voltage provided by the DC power supply into rectangular waves which change between a positive voltage and a negative voltage, and sending the rectangular waves to the magnetic element so as to cause the positive voltage and the negative voltage at two ends of the magnetic element to change; a voltage measuring device connected in parallel with the DC power supply and used for measuring the input voltage of the power converter; and a current measuring device connected in series between the DC power supply and the power converter and used for measuring the input current of the power converter, wherein the magnetic element loss is substantially the product of the input voltage and the input current of the power converter, that is, the magnetic element loss is acquired through multiplying the input voltage by the input current of the power converter. The required test time of the magnetic element loss measuring device is very short, so that the measuring device is suitable for the quality control of the magnetic element.
Description
Technical field
The present invention relates to a kind of measurement mechanism, relate in particular to a kind of measurement mechanism of magnetic element loss.
Background technology
Magnetic element, for example transformer or inductance etc. are element important in the various electronic products and since the quality of magnetic element can influence electronic product whether can normal operation and running performance, therefore, how to obtain correctly that the magnetic element genuine property is real to be major issue now.
See also Fig. 1, it is the structural representation of traditional measurement magnetic element loss.As shown in the figure, the mode of traditional measurement magnetic element loss mainly is to utilize string ripple signal to measure magnetic element 11, so its structure comprises string ripple signal generator 12, HF voltage amplifier 13 and surveying instrument 14.The measuring principle and the method for traditional measurement magnetic element loss are as follows: at first, string ripple signal generator 12 generation sines or cosine waveform are to HF voltage amplifier 13, HF voltage amplifier 13 will output to magnetic element 11 after sine or the cosine wave (CW) amplification more then, utilize this moment surveying instrument 14 to measure the current signal I and the voltage signal V of magnetic element 11, wherein can there be phase angle difference θ in current signal I and voltage signal V, and the loss P of magnetic element 11 just can calculate by formula P=VIcos θ.In some implementations, can also measure the opposite side (not shown) of magnetic element 11, to obtain the voltage signal V of magnetic element 11.Yet this measuring method has following shortcoming:
1. equipment cost height: owing to need to use high frequency range and accurate string ripple signal generator 12, HF voltage amplifier 13 and surveying instrument 14, so equipment cost is higher.
2. measurement environment requires high: owing to must use accurate equipment, so need measure, cause the increase of measuring cost under specific temperature and humidity environment.
3. produce big electromagnetic wave: when sine that string ripple signal generator 12 is produced or cosine waveform are amplified via HF voltage amplifier 13, bigger electromagnetic wave can be produced, therefore the cost that maybe needs to increase electromagnetic protection equipment can be impacted instrument and equipment and operating personnel.
4. measuring equipment consumption is more high-power: string ripple signal generator 12, HF voltage amplifier 13 and surveying instrument 14 all need power supply to operate, and the power attenuation that these equipment are produced when measuring can cause unnecessary energy consumption much larger than the loss P of magnetic element 11.
See also Fig. 2, it is the structural representation of another kind of traditional measurement magnetic element.As shown in the figure, the mode of this traditional measurement magnetic element is for to be placed on magnetic element 11 in the insulating medium 21 with conductive capability, for example deionized water or insulating oil.When magnetic element 11 was given in external power source 22 power supplies, magnetic element 11 had power attenuation, and the loss P of this magnetic element 11 can be converted to heat energy rises the temperature of insulating medium 21.Because insulating medium 21 and magnetic element 11 all are to be placed in the cool-bag 23, also can not increase so heat energy can not run off.Then, use stirrer 24 to make insulating medium 21 sammings in the cool-bag 23, at this moment,, and calculate the temperature rise △ T of insulating medium 21 as long as utilize temperature meter 25 just can measure the temperature of insulating medium 21.Therefore, the loss P of magnetic element 11 just can calculate by formula P=△ TCM/ △ t, and wherein C is the specific heat of insulating medium 21, and M is the quality of insulating medium 21, the time of △ t for measuring.Yet this measuring method has following shortcoming:
1. measuring accuracy is not high: the temperature that magnetic element 11 can operate as normal is limited, the ascending temperature of insulating medium 21 is restricted, so measuring accuracy is not high.In addition, the temperature of insulating medium 21 in cool-bag 23 is wayward to be samming, so the measured temperature difference in different measuring position, causes measuring accuracy to promote.
2. measuring period is long: because every measurement once just needs to change the insulating medium 21 of high temperature, or wait for that insulating medium 21 coolings of high temperature just can measure next magnetic element 11, and therefore quite time-consuming.
3. easily produce human error: each step during owing to measurement all might produce error, so personnel operation requires higher relatively.
Therefore, how to develop a kind of measurement mechanism that improves the magnetic element loss of above-mentioned prior art disappearance, for pressing for the problem of solution at present.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of measurement mechanism of magnetic element loss, this installs, and not only cost is low, the measurement environment requirement is lower, and has only partial circuit meeting loss power in the device, therefore can solve prior art when measuring magnetic element loss, the problem of the energy that measurement mechanism itself is also can loss very big, and then reduce the consume of energy.In addition, it is shorter relatively to measure the required time, is suitable for the qualitative control of magnetic element, does not also have complicated measuring process, therefore requires also relatively low to personnel operation.
For achieving the above object, of the present invention than the broad sense embodiment for a kind of measurement mechanism of magnetic element loss is provided, in order to measure the loss of magnetic element.The measurement mechanism of magnetic element loss of the present invention comprises: power supply changeover device, be connected with direct supply and magnetic element, in order to the DC voltage that direct supply provided is converted to square wave that generating positive and negative voltage changes, make the magnetic element two ends produce the generating positive and negative voltage variation to magnetic element; The voltage measurement device is parallel to direct supply, in order to measure the input voltage of power supply changeover device; And the current measurement device, be series between direct supply and the power supply changeover device, in order to measure the input current of power supply changeover device.Wherein, the loss of magnetic element is essentially the input voltage of power supply changeover device and the product of input current, obtains the loss of magnetic element with the product of input voltage by power supply changeover device and input current.
The measurement mechanism of aforesaid magnetic element loss, wherein this power supply changeover device comprises: commutation circuit, have at least one on-off element, this commutation circuit is connected with the input side and the outgoing side of this power supply changeover device; And control circuit, be connected with this commutation circuit, in order to the whether conducting of this on-off element of controlling this commutation circuit; Wherein, this control circuit of this power supply changeover device uses another direct supply or this direct supply.
The measurement mechanism of aforesaid magnetic element loss, wherein this commutation circuit comprises: input capacitance is parallel to the direct current input side two ends of this power supply changeover device and is total to contact, in order to filtering; First on-off element, an end of this first on-off element is connected in the direct current input side of this power supply changeover device, and the other end then is connected in the outgoing side of this power supply changeover device, and controls whether conducting by this control circuit; Second switch element, this second switch element are parallel to the outgoing side two ends of this power supply changeover device and contact altogether, and control whether conducting by this control circuit; And output capacitance, be connected between the outgoing side of this common contact and this power supply changeover device, or between the outgoing side of this first on-off element and this power supply changeover device.
The measurement mechanism of aforesaid magnetic element loss, wherein this commutation circuit comprises: input capacitance is parallel to the direct current input side two ends of this power supply changeover device and is total to contact, in order to filtering; The 3rd on-off element is connected with this input capacitance and this direct supply; The 4th on-off element is connected with this common contact; The 5th on-off element, an end of the 5th on-off element is connected with this input capacitance, the 3rd on-off element and this direct supply, and the other end is connected with the 4th on-off element; And the 6th on-off element, an end of the 6th on-off element is connected with contact and the 4th on-off element altogether, and the other end is connected with the 3rd on-off element; Wherein, when this control circuit is controlled the 3rd on-off element and the 4th on-off element conducting, the 5th on-off element and the 6th on-off element end, and when this control circuit was controlled the 5th on-off element and the 6th on-off element conducting, the 3rd on-off element and the 4th on-off element ended.
The measurement mechanism of aforesaid magnetic element loss, wherein this commutation circuit also comprises output capacitance, and this output capacitance one end is connected with the 3rd on-off element and the 6th on-off element, and the other end is connected with the outgoing side of this power supply changeover device.
The measurement mechanism of aforesaid magnetic element loss, wherein this commutation circuit also comprises first electric capacity, is connected in series between the 5th on-off element and this direct supply.
The measurement mechanism of aforesaid magnetic element loss, wherein this commutation circuit comprises: input capacitance is parallel to the direct current input side two ends of this power supply changeover device and is total to contact, in order to filtering; Minion is closed element, is connected with this input capacitance; Octavo is closed element, is connected with this common contact; First diode, this first diode, one end close element with this octavo and are connected, and the other end is connected with this direct supply; Second diode, this second diode, one end close element with this minion and are connected, and contact is connected the other end with being somebody's turn to do altogether; Wherein, when this control circuit was controlled this minion pass element and the element conducting of this octavo pass, this first diode and second diode ended.
The measurement mechanism of aforesaid magnetic element loss, wherein this control circuit uses the zero voltage switching mode to control this commutation circuit.
The measurement mechanism of aforesaid magnetic element loss, wherein the dutycycle of this square wave is in fact between 0 to 1.
The measurement mechanism of aforesaid magnetic element loss, wherein the electric current of this magnetic element is a triangular wave.
The measurement mechanism of aforesaid magnetic element loss, wherein this voltage measurement device and this current measurement device are implemented in power checker, in order to directly to measure the loss of this magnetic element.
The required Measuring Time of the measurement mechanism of magnetic element loss of the present invention is very short, is fit to be used in the qualitative control of magnetic element, does not more have complicated measuring process, requires relatively low to personnel operation.
Description of drawings
Fig. 1 is the structural representation of traditional measurement magnetic element loss.
Fig. 2 is the structural representation of another traditional measurement magnetic element loss.
Fig. 3 (a) is the circuit box synoptic diagram of preferred embodiment of the measurement mechanism of magnetic element loss of the present invention.
Fig. 3 (b) is the circuit box synoptic diagram of another preferred embodiment of the measurement mechanism of magnetic element loss of the present invention.
Fig. 4 is first control signal of control circuit and the electric current and voltage sequential chart of magnetic element.
Fig. 5 is the synoptic diagram of commutation circuit second embodiment of the measurement mechanism of magnetic element loss of the present invention.
Fig. 6 is the synoptic diagram of commutation circuit the 3rd embodiment of the measurement mechanism of magnetic element loss of the present invention.
Fig. 7 is the synoptic diagram of commutation circuit the 4th embodiment of the measurement mechanism of magnetic element loss of the present invention.
Fig. 8 is the synoptic diagram of commutation circuit the 5th embodiment of the measurement mechanism of magnetic element loss of the present invention.
Fig. 9 is the synoptic diagram of commutation circuit the 6th embodiment of the measurement mechanism of magnetic element loss of the present invention.
Figure 10 is the 3rd control signal of control circuit and the electric current and voltage sequential chart of magnetic element.
Wherein, description of reference numerals is as follows:
11: magnetic element 12: string ripple signal generator
13: HF voltage amplifier 14: surveying instrument
I: the current signal V of magnetic element: the voltage signal of magnetic element
21: insulating medium 22: external power source
23: cool-bag 24: stirrer
25: temperature meter 31: magnetic element
32: power supply changeover device 321: commutation circuit
322: control circuit 33: the voltage measurement device
34: 35: the first direct supplys of current measurement device
36: the second direct supply Q1: first on-off element
Q2: second switch element Q3: the 3rd on-off element
Q4: the 4th on-off element Q5: the 5th on-off element
Q6: the 6th on-off element Q7: minion is closed element
Q8: octavo is closed element D1: first diode
D2: the second diode Cin: input capacitance
C: the first electric capacity Vin: the input voltage of power supply changeover device
Co: output capacitance Iin: the input current of power supply changeover device
COM: be total to contact i
L: the electric current of magnetic element
V
L: the both end voltage Vg1 of magnetic element: first control signal
Vg2: the second control signal Vg3: the 3rd control signal
Embodiment
Some exemplary embodiments that embody feature of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different schemes, its neither departing from the scope of the present invention, and explanation wherein and the accompanying drawing usefulness that ought explain in itself, but not in order to restriction the present invention.
See also Fig. 3 (a), it is the circuit diagram of preferred embodiment of the measurement mechanism of magnetic element loss of the present invention.As shown in the figure, the measurement mechanism of magnetic element loss of the present invention mainly comprises: power supply changeover device 32, voltage measurement device 33, current measurement device 34 and first direct supply 35, wherein power supply changeover device 32 is connected with first direct supply 35 and magnetic element 31, convert square wave that generating positive and negative voltage changes to magnetic element 31 in order to the DC voltage that first direct supply 35 is provided, make magnetic element 31 two ends produce generating positive and negative voltage and change.And power supply changeover device 32 comprises commutation circuit 321 and control circuit 322, and moves by the part on-off element of control circuit 322 control commutation circuits 321, and then makes magnetic element 31 two ends produce the generating positive and negative voltage variation, is beneficial to the measurement of magnetic element 31 losses.
When magnetic element loss measurement mechanism 3 of the present invention operates, can be by the voltage measurement device 33 that is parallel to first direct supply 35, and be series at input voltage vin and the input current Iin that current measurement device 34 between first direct supply 35 and the power supply changeover device 32 is obtained power supply changeover device 32.Because control circuit 322 is by 36 power supplies of second direct supply, and commutation circuit 321 is used for example zero voltage switching (zerovoltage switched, ZVS), therefore the power input of power supply changeover device 32 equals output power in fact, so the loss P of magnetic element 31 equals the power of power supply changeover device 32 inputs in fact, can calculate the loss P of magnetic element 31 by this by formula P=Vin.Iin.In addition, voltage measurement device 33 and current measurement device 34 are for the input voltage vin of measuring power supply changeover device 32 and input current Iin, to calculate the loss P of magnetic element 31, therefore, voltage measurement device 33 and current measurement device 34 can be replaced by power checker (not accompanying drawing), directly measure the loss P of magnetic element 31 by power checker.
In certain embodiments, please consult Fig. 3 (a) again, the power supply changeover device 32 of the measurement mechanism 3 of magnetic element loss of the present invention can comprise commutation circuit 321 and control circuit 322, and wherein commutation circuit 321 comprises input capacitance Cin, the first on-off element Q1, second switch element Q2 and output capacitance Co.Input capacitance Cin is parallel to the direct current input side two ends of power supply changeover device 32 and is total to contact COM, in order to filtering.The end of the first on-off element Q1 is connected in the direct current input side of power supply changeover device 32, and the other end then is connected in the outgoing side of power supply changeover device 32, and controls whether conducting by the first control signal Vg1 of control circuit 322.Second switch element Q2 is parallel to the outgoing side two ends of power supply changeover device 32 and contact COM altogether, and controls whether conducting by the second control signal Vg2 of control circuit 322.In addition, output capacitance Co is connected in series between the outgoing side of common contact COM and power supply changeover device 32.
See also Fig. 3 (a) and Fig. 4, wherein Fig. 4 is first control signal of control circuit and the electric current and voltage sequential chart of magnetic element.Control circuit 322 is controlled whether conducting of the first on-off element Q1 and second switch element Q2 respectively by the first control signal Vg1 and the second control signal Vg2.As shown in Figure 4, in the present embodiment, the dutycycle of the first control signal Vg1 and the second control signal Vg2 (duty cycle) is for example 50%, and just noble potential and electronegative potential respectively are half in the shared time of one-period.Certainly, the dutycycle of the first control signal Vg1 and the second control signal Vg2 can be adjusted arbitrarily according to user's demand, is not defined as 50%.Simultaneously, in order to make commutation circuit 321 have for example zero voltage switching effect, when the first control signal Vg1 and second control signal Vg2 switching, have one section very of short duration (dead-time) (not shown) of reactionless time, in this reactionless time, the first control signal Vg1 and the second control signal Vg2 can be the electronegative potential (not shown) simultaneously, because the reactionless time is very of short duration, so omit in Fig. 4.When the control circuit 322 controls first control signal Vg1 is noble potential, first on-off element Q1 meeting conducting, at this moment, the output voltage of power supply changeover device 32 is the both end voltage V of magnetic element 31 just
L, in the present embodiment, the both end voltage V of magnetic element 31
LBe 0.5Vin.When the control circuit 322 controls second control signal Vg2 is noble potential, second switch element Q2 meeting conducting, at this moment, the both end voltage V of magnetic element 31
LFor-0.5Vin.Change with electronegative potential because the first control signal Vg1 and the second control signal Vg2 continue noble potential, make square wave that power supply changeover device 32 can the variation of output generating positive and negative voltages to magnetic element 31, wherein the dutycycle of this square wave is in fact between 0 to 1.Magnetic element 31 can produce current i in response to square wave changes
L, with the characteristic of magnetic element 31 current i of magnetic element 31 as can be known
LCan be triangular wave, the iron core of magnetic element 31 also can produce corresponding triangular wave magnetic flux and the produce power loss simultaneously.Because, control circuit 322 is very little by the energy loss of 36 power supplies of second direct supply and commutation circuit 321, so the loss P of magnetic element 31 equals the power of power supply changeover device 32 inputs in fact, with this power input that just can utilize the power supply changeover device 32 of measurement, obtain the loss P of magnetic element 31.Certainly, in other embodiments, shown in Fig. 3 (b), control circuit 322 can also directly be powered by first direct supply 35, does not influence the power of power supply changeover device 32 inputs and the measurement of magnetic element 31 loss P.
See also Fig. 5, it is the synoptic diagram of commutation circuit second embodiment of the measurement mechanism of magnetic element loss of the present invention.As shown in Figure 5, the commutation circuit 321 of power supply changeover device 32 equally comprises input capacitance Cin, the first on-off element Q1, second switch element Q2 and output capacitance Co, wherein the function of each element is similar to previous embodiment to structure, just output capacitance Co is connected between the outgoing side of the first on-off element Q1 and power supply changeover device 32, in order to filtering flip-flop, make the both end voltage V of magnetic element 31
LFor not having the square wave of flip-flop.The current i of magnetic element 31
LIt equally is triangular wave, the iron core of magnetic element 31 also can produce corresponding triangular wave magnetic flux and the produce power loss simultaneously, therefore, similarly, the loss P of magnetic element 31 equals the power of power supply changeover device 32 inputs in fact, with this power input that just can utilize the power supply changeover device 32 of measurement, obtain the loss P of magnetic element 31.
See also Fig. 6, it is the synoptic diagram of commutation circuit the 3rd embodiment of the measurement mechanism of magnetic element loss of the present invention.As shown in Figure 6, the commutation circuit 321 of power supply changeover device 32 comprises input capacitance Cin, the 3rd on-off element Q3, the 4th on-off element Q4, the 5th on-off element Q5, the 6th on-off element Q6 and output capacitance Co.Wherein, input capacitance Cin is parallel to the direct current input side two ends of power supply changeover device 32 and is total to contact COM, in order to filtering.The 3rd on-off element Q3 and the 6th on-off element Q6 are connected in series in the A point, and the 3rd on-off element Q3 is connected with first direct supply 35 respectively with the other end of the 6th on-off element Q6.The 5th on-off element Q5 and the 4th on-off element Q4 are connected in series in the B point, and the 5th on-off element Q5 reaches altogether with first direct supply 35 respectively with the other end of the 4th on-off element Q4, and contact COM is connected.Output capacitance Co is connected between A point and the commutation circuit 321, in order to filtering flip-flop.Control circuit 322 equally can utilize the first control signal Vg1 and 321 runnings of second control signal Vg2 control commutation circuit, and when the first control signal Vg1 was noble potential, the 3rd on-off element Q3 and the 4th on-off element Q4 can conductings.When the second control signal Vg2 was noble potential, the 5th on-off element Q5 and the 6th on-off element Q6 can conductings, made the both end voltage V of magnetic element 31
LFor not having flip-flop and the peak value square wave for ± 0.5Vin, just mean value is zero square wave, the current i of magnetic element 31
LIt equally can be triangular wave, the iron core of magnetic element 31 also can produce corresponding triangular wave magnetic flux and the produce power loss simultaneously, therefore, the loss P of magnetic element 31 equals the power of power supply changeover device 32 inputs in fact, with this power input that just can utilize the power supply changeover device 32 of measurement, obtain the loss P of magnetic element 31.Certainly, in further embodiments, as shown in Figure 7, can also remove output capacitance Co, at this moment, the dutycycle of square wave thinks 50% only.
See also Fig. 8, it is the synoptic diagram of commutation circuit the 5th embodiment of the measurement mechanism of magnetic element loss of the present invention.As shown in Figure 8, the commutation circuit 321 of power supply changeover device 32 comprises input capacitance Cin, the 3rd on-off element Q3, the 4th on-off element Q4, the 5th on-off element Q5, the 6th on-off element Q6 and first capacitor C.Wherein, input capacitance Cin is parallel to the direct current input side two ends of power supply changeover device 32 in order to filtering.The 3rd on-off element Q3 and the 6th on-off element Q6 are connected in series in the A point, and the 3rd on-off element Q3 reaches altogether with first direct supply 35 respectively with the other end of the 6th on-off element Q6, and contact COM is connected.The 5th on-off element Q5 is connected in the B point with the 4th on-off element Q4 and is connected with first capacitor C, and the 4th on-off element Q4 is connected with first direct supply 35 respectively with the other end of first capacitor C.The voltage Vc of first capacitor C can change along with the dutycycle of the first control signal Vg1 and the second control signal Vg2, the voltage Vc of first capacitor C can be zero when dutycycle is 50%, and when the first control signal Vg1 is noble potential, the 3rd on-off element Q3 and the 4th on-off element Q4 meeting conducting, the both end voltage V of magnetic element 31
LBe Vin.In addition, when the second control signal Vg2 is noble potential, the 5th on-off element Q5 and the 6th on-off element Q6 meeting conducting, the both end voltage V of magnetic element 31
LFor-Vin+Vc.So, the both end voltage V of magnetic element 31
LFor containing the square wave of flip-flop, just mean value is the square wave of Vc, the current i of magnetic element 31
LIt equally can be triangular wave, the iron core of magnetic element 31 also can produce corresponding triangular wave magnetic flux and the produce power loss simultaneously, therefore, in the same manner, the loss P of magnetic element 31 equals the power of power supply changeover device 32 inputs in fact, with this power input that just can utilize the power supply changeover device 32 of measurement, obtain the loss P of magnetic element 31.
See also Fig. 9, it is the synoptic diagram of commutation circuit the 6th embodiment of the measurement mechanism of magnetic element loss of the present invention.As shown in Figure 9, the commutation circuit 321 of power supply changeover device 32 comprises input capacitance Cin, minion is closed element Q7, octavo pass element Q8, the first diode D1, the second diode D2.Wherein, input capacitance Cin is parallel to the direct current input side two ends of power supply changeover device 32 and is total to contact COM, in order to filtering.Minion is closed element Q7 and the second diode D2 is connected in series in the A point, and minion pass element Q7 reaches altogether with first direct supply 35 respectively with the other end of the second diode D2, and contact COM is connected.The first diode D1 and octavo are closed element Q8 and are connected in series in the B point, and the first diode D1 reaches altogether with first direct supply 35 respectively with the other end of octavo pass element Q8, and contact COM is connected.Figure 10 is the 3rd control signal of control circuit and the electric current and voltage sequential chart of magnetic element, as shown in figure 10, at time t0 between the t1, the 3rd control signal Vg3 is a noble potential, at this moment, minion is closed element Q7 and the element Q8 conducting of octavo pass, the both end voltage V of magnetic element 31
LBe Vin.At time t1 between the t2, the 3rd control signal Vg3 is an electronegative potential, and minion closes element Q7 and octavo is closed not conducting of element Q8, the first diode D1 and the second diode D2 conducting owing to the afterflow effect of magnetic element 31, at this moment, the both end voltage V of magnetic element 31
LFor-Vin, the current i of magnetic element 31
LLinear decline is up to the current i of magnetic element 31
LBe zero, the first diode D1 and the second diode D2 then end.Therefore, the both end voltage V of magnetic element 31
LBe discontinuous square wave, the current i of magnetic element 31
LIt equally can be discontinuous triangular wave, the iron core of magnetic element 31 also can produce discontinuous triangular wave magnetic flux and the produce power loss simultaneously, therefore, in the same manner, the loss P of magnetic element 31 equals the power of power supply changeover device 32 inputs in fact, with this power input that just can utilize the power supply changeover device 32 of measurement, obtain the loss P of magnetic element 31.
In sum, the measurement mechanism of magnetic element loss of the present invention uses high-precision power supply changeover device 32, voltage measurement device 33, current measurement device 34 and first direct supply 35, these equipment not only cost are low and measurement environment is less demanding, and have only control circuit 322 to understand loss powers in the device, therefore can solve prior art when measuring magnetic element loss, the problem of the energy that measurement mechanism itself is also can loss very big, and then reduce the consumption of energy.In addition, the required Measuring Time of the measurement mechanism of magnetic element loss of the present invention is very short, is suitable for the qualitative control of magnetic element, does not more have complicated measuring process, requires relatively low to personnel operation.
The present invention can make various modifications by those skilled in the art, but does not break away from appended claims scope required for protection.
Claims (11)
1. the measurement mechanism of a magnetic element loss, in order to measure the loss of magnetic element, wherein the measurement mechanism of this magnetic element loss comprises:
Power supply changeover device is connected with direct supply and this magnetic element, arrives this magnetic element in order to the square wave that the DC voltage that this direct supply provided is converted to the generating positive and negative voltage variation, makes this magnetic element two ends produce generating positive and negative voltage and changes;
The voltage measurement device is parallel to this direct supply, in order to measure the input voltage of this power supply changeover device; And
The current measurement device is series between this direct supply and this power supply changeover device, in order to measure the input current of this power supply changeover device;
Wherein, the product of input voltage by this power supply changeover device and input current obtains the loss of this magnetic element.
2. the measurement mechanism of magnetic element loss as claimed in claim 1, wherein this power supply changeover device comprises:
Commutation circuit has at least one on-off element, and this commutation circuit is connected with the input side and the outgoing side of this power supply changeover device; And
Control circuit is connected with this commutation circuit, in order to the whether conducting of this on-off element of controlling this commutation circuit;
Wherein, this control circuit of this power supply changeover device uses another direct supply or this direct supply.
3. the measurement mechanism of magnetic element loss as claimed in claim 2, wherein this commutation circuit comprises:
Input capacitance is parallel to the direct current input side two ends of this power supply changeover device and is total to contact, in order to filtering;
First on-off element, an end of this first on-off element is connected in the direct current input side of this power supply changeover device, and the other end then is connected in the outgoing side of this power supply changeover device, and controls whether conducting by this control circuit;
Second switch element, this second switch element are parallel to the outgoing side two ends of this power supply changeover device and contact altogether, and control whether conducting by this control circuit; And
Output capacitance is connected between the outgoing side of this common contact and this power supply changeover device, or between the outgoing side of this first on-off element and this power supply changeover device.
4. the measurement mechanism of magnetic element loss as claimed in claim 2, wherein this commutation circuit comprises:
Input capacitance is parallel to the direct current input side two ends of this power supply changeover device and is total to contact, in order to filtering;
The 3rd on-off element is connected with this input capacitance and this direct supply;
The 4th on-off element is connected with this common contact;
The 5th on-off element, an end of the 5th on-off element is connected with this input capacitance, the 3rd on-off element and this direct supply, and the other end is connected with the 4th on-off element; And
The 6th on-off element, an end of the 6th on-off element is total to contact with this and the 4th on-off element is connected, and the other end is connected with the 3rd on-off element;
Wherein, when this control circuit is controlled the 3rd on-off element and the 4th on-off element conducting, the 5th on-off element and the 6th on-off element end, and when this control circuit was controlled the 5th on-off element and the 6th on-off element conducting, the 3rd on-off element and the 4th on-off element ended.
5. the measurement mechanism of magnetic element loss as claimed in claim 4, wherein this commutation circuit also comprises output capacitance, one end of this output capacitance is connected with the 3rd on-off element and the 6th on-off element, and the other end is connected with the outgoing side of this power supply changeover device.
6. the measurement mechanism of magnetic element loss as claimed in claim 4, wherein this commutation circuit also comprises first electric capacity, is connected in series between the 5th on-off element and this direct supply.
7. the measurement mechanism of magnetic element loss as claimed in claim 2, wherein this commutation circuit comprises:
Input capacitance is parallel to the direct current input side two ends of this power supply changeover device and is total to contact, in order to filtering;
Minion is closed element, is connected with this input capacitance;
Octavo is closed element, is connected with this common contact;
First diode, an end of this first diode close element with this octavo and are connected, and the other end is connected with this direct supply;
Second diode, an end of this second diode close element with this minion and are connected, and contact is connected the other end with being somebody's turn to do altogether;
Wherein, when this control circuit was controlled this minion pass element and the element conducting of this octavo pass, this first diode and second diode ended.
8. the measurement mechanism of magnetic element loss as claimed in claim 2, wherein this control circuit uses zero voltage switching mode to control this commutation circuit.
9. the measurement mechanism of magnetic element loss as claimed in claim 1, wherein the dutycycle of this square wave is in fact between 0 to 1.
10. the measurement mechanism of magnetic element loss as claimed in claim 1, wherein the electric current of this magnetic element is a triangular wave.
11. the measurement mechanism of magnetic element loss as claimed in claim 1, wherein this voltage measurement device and this current measurement device are implemented in power checker, in order to directly to measure the loss of this magnetic element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101427841A CN101373210B (en) | 2007-08-23 | 2007-08-23 | Device for measuring magnetic element loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101427841A CN101373210B (en) | 2007-08-23 | 2007-08-23 | Device for measuring magnetic element loss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101373210A true CN101373210A (en) | 2009-02-25 |
| CN101373210B CN101373210B (en) | 2011-07-20 |
Family
ID=40447483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101427841A Expired - Fee Related CN101373210B (en) | 2007-08-23 | 2007-08-23 | Device for measuring magnetic element loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101373210B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262181A (en) * | 2011-07-15 | 2011-11-30 | 保定天威集团有限公司 | Method and device for measuring component stray loss based on leakage magnetic flux compensation |
| CN102620753A (en) * | 2011-02-22 | 2012-08-01 | 罗兰克斯两合有限公司 | Inductive position sensor |
| CN102620754A (en) * | 2011-02-22 | 2012-08-01 | 罗兰克斯两合有限公司 | Inductive position sensor |
| CN103226187A (en) * | 2013-04-23 | 2013-07-31 | 福州大学 | Method for measuring loss of magnetic element |
| CN104198966A (en) * | 2014-09-15 | 2014-12-10 | 河北工业大学 | Measurement method and device of abnormal loss of electrical engineering magnetic material |
| CN106291124A (en) * | 2016-08-17 | 2017-01-04 | 福州大学 | The calibrating method that a kind of core loss is measured |
| CN106646283A (en) * | 2017-01-22 | 2017-05-10 | 保定天威保变电气股份有限公司 | Method of determining magnetic conductive member stray loss |
| PL236191B1 (en) * | 2019-04-19 | 2020-12-14 | Politechnika Czestochowska | Measuring station for determining the deviation of brake magnet of electricity meters |
| CN113884957A (en) * | 2021-09-26 | 2022-01-04 | 福州大学 | Method and system for measuring core loss of magnetic element of PFC circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4827214A (en) * | 1986-09-24 | 1989-05-02 | Hitachi Metals, Ltd. | Method for measuring losses of a magnetic core |
| JP2002233158A (en) * | 1999-11-09 | 2002-08-16 | O2 Micro Internatl Ltd | High-efficiency adaptive dc-to-ac converter |
| US7148633B2 (en) * | 2004-10-18 | 2006-12-12 | Beyond Innovation Technology | DC/AC inverter |
-
2007
- 2007-08-23 CN CN2007101427841A patent/CN101373210B/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620753B (en) * | 2011-02-22 | 2015-01-21 | 罗兰克斯两合有限公司 | Inductive position sensor |
| CN102620753A (en) * | 2011-02-22 | 2012-08-01 | 罗兰克斯两合有限公司 | Inductive position sensor |
| CN102620754A (en) * | 2011-02-22 | 2012-08-01 | 罗兰克斯两合有限公司 | Inductive position sensor |
| CN102620754B (en) * | 2011-02-22 | 2015-06-10 | 罗兰克斯两合有限公司 | Inductive position sensor |
| CN102262181A (en) * | 2011-07-15 | 2011-11-30 | 保定天威集团有限公司 | Method and device for measuring component stray loss based on leakage magnetic flux compensation |
| CN103226187B (en) * | 2013-04-23 | 2015-06-03 | 福州大学 | Method for measuring loss of magnetic element |
| CN103226187A (en) * | 2013-04-23 | 2013-07-31 | 福州大学 | Method for measuring loss of magnetic element |
| CN104198966A (en) * | 2014-09-15 | 2014-12-10 | 河北工业大学 | Measurement method and device of abnormal loss of electrical engineering magnetic material |
| CN106291124A (en) * | 2016-08-17 | 2017-01-04 | 福州大学 | The calibrating method that a kind of core loss is measured |
| CN106646283A (en) * | 2017-01-22 | 2017-05-10 | 保定天威保变电气股份有限公司 | Method of determining magnetic conductive member stray loss |
| CN106646283B (en) * | 2017-01-22 | 2019-01-11 | 保定天威保变电气股份有限公司 | A kind of method of determining conducting magnetic component stray loss |
| PL236191B1 (en) * | 2019-04-19 | 2020-12-14 | Politechnika Czestochowska | Measuring station for determining the deviation of brake magnet of electricity meters |
| CN113884957A (en) * | 2021-09-26 | 2022-01-04 | 福州大学 | Method and system for measuring core loss of magnetic element of PFC circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101373210B (en) | 2011-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101373210B (en) | Device for measuring magnetic element loss | |
| CN102340911B (en) | Control circuit and control method for light emitting diode (LED) driver | |
| CN104953877B (en) | T-shaped three-level inverter finite aggregate model predictive control method and system | |
| Franceschini et al. | 3boost: A high-power three-phase step-up full-bridge converter for automotive applications | |
| CN101867289B (en) | Switch power supply with constant voltage/constant current output and control method thereof | |
| CN101865882B (en) | Automatic measuring system for iron loss of magnetic material | |
| CN201503469U (en) | Digital megohmmeter | |
| CN113740601B (en) | Phase current acquisition method, apparatus, device, system and storage medium | |
| CN103401442A (en) | Output constant current-based digital controller of AC-DC (alternating current-direct current) isolated converter | |
| TW200909822A (en) | Measuring apparatus for power loss of magnetic device | |
| CN202471808U (en) | Electrically-isolated voltage sampling module circuit | |
| CN102122891A (en) | Absorption feedback circuit for transformer leakage inductance energy | |
| CN103630735B (en) | A kind of voltage slope change detection circuit and method | |
| CN209946309U (en) | IGBT drive test circuit | |
| CN103248225B (en) | Power supply change-over device, power conversion unit changing method and electronic equipment | |
| CN104734483A (en) | DC bus capacitor voltage equalizing device | |
| Jianyu et al. | A novel resonant network for a WPT system with constant output voltage | |
| CN205017227U (en) | Three inverter finite set model predictive control systems on T type | |
| CN101425754A (en) | Method and controller for controlling output current of switch electric power | |
| CN101499779B (en) | Piezoelectric minimized wide-band power amplifier | |
| EP4206691A1 (en) | Low-power-consumption intelligent current sensor and working mode control method therefor | |
| CN115395767A (en) | Infrared light source constant power control circuit | |
| CN113659839B (en) | Primary side current analog circuit of flyback converter and using device thereof | |
| CN110474533B (en) | Circuit for identifying equivalent resistance in direct current converter | |
| CN104486857B (en) | The voltage sampling circuit of electromagnetic heater and electromagnetic heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20150823 |
|
| EXPY | Termination of patent right or utility model |