CN201555868U - Portable resistance type current phase shifter - Google Patents
Portable resistance type current phase shifter Download PDFInfo
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- CN201555868U CN201555868U CN2009202743431U CN200920274343U CN201555868U CN 201555868 U CN201555868 U CN 201555868U CN 2009202743431 U CN2009202743431 U CN 2009202743431U CN 200920274343 U CN200920274343 U CN 200920274343U CN 201555868 U CN201555868 U CN 201555868U
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Abstract
The utility model relates to a portable resistance type current phase shifter. Two fixed point connectors of a slide wire resistor are connected between a first phase line and a second phase line of a three-phase power grid line; a sliding point connector of the slide wire resistor is connected with a first end of a transformer primary winding; a second end of the transformer primary winding is connected with a null line of the three-phase power grid line; a first end of a secondary winding of the transformer is serially connected with a sample current input end of a power factor meter through a load resistor and an ampere meter; an output end of the power factor meter is connected with the sample current input end of an automatic compensation product to be detected with the power factor; a second end of the secondary winding of the transformer is connected with the sample current output end of the automatic compensation product to be detected with the power factor; the power factor meter and the sample current input end of the automatic compensation product to be detected with the power factor are connected with a third phase line of the three-phase power grid line; and the power factor meter and the null line of the automatic compensation product to be detected with the power factor are connected with the null line of the three-phase power grid line.
Description
Technical field
The utility model relates to power factor test unit technical field, relates in particular to a kind of portable resistor-type current phase shifter.
Background technology
At present, the auto power-factor compensating capacitor panel can keep certain level at power factor of electric network, reach the purpose of saves energy, automatic switching function for the automatic compensation condenser cabinet of guaranteed output factor product, every product all needs to carry out the action test under different capacity factor situation before dispatching from the factory, be a most important pilot project in all tests.
Stipulate that in initial test program this auto power-factor compensating capacitor panel product will connect a corresponding asynchronous motor, by changing the variation that motor load realizes power factor.This method will be employed many testing equipments, and investment cost costliness (need a cover frequency conversion unit, starting device, pressure regulator, and take bigger place) consumes a large amount of energy and long time and the labour of cost, can not adapt to the Workshop Production progress fully.
Condition forces us to find new outlets now, manages to adopt analogy method of equal value to solve problem.From the principles of electric and electronic engineering as can be known, the cosine of angle is power factor between voltage and the electric current, so as long as can make the electric current phase shift, can realize the power factor adjusting.As everyone knows, when having inductance and electric capacity in the circuit, just can obtain phase lag or leading electric current, present technology is to adopt an adjustable rheostat and variable inductor to form electric current phase shift regulating loop, use through actual, can play the phase shift effect within the specific limits, tentatively solved the difficulty on the product testing, but, along with being extensive use of of this impedance line, expose again and still exist sizable defective, be that the current waveform that distortion causes distortion takes place the saturated current waveform that makes of telefault, influence test mass, to be lower than 0.9 distortion when following serious when power factor is adjusted to, can not correctly simulate actual power factor of electric network, if still adopt the principle of impedance line, just must manufacture and design special telefault, volume and weight all will increase greatly, moving and use all will be very inconvenient, lose the superiority of analog form.
The utility model content
The purpose of this utility model provides a kind of portable resistor-type current phase shifter, is used to carry out the action test of auto power-factor compensating product under different capacity factor situation.
A kind of portable resistor-type current phase shifter, wherein: comprise slide wire resistance, transformer, pull-up resistor, power factor meter, wherein, two fixed point joints of slide wire resistance are used to be connected first phase of three phase network circuit, between the second phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the third phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the third phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
Described portable resistor-type current phase shifter, wherein: two fixed point joints of slide wire resistance are used to be connected the B phase of three phase network circuit, between the C phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the A phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the A phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
Described portable resistor-type current phase shifter, wherein: two fixed point joints of slide wire resistance are used to be connected the A phase of three phase network circuit, between the B phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the C phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the C phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
Described portable resistor-type current phase shifter, wherein: two fixed point joints of slide wire resistance are used to be connected the A phase of three phase network circuit, between the C phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the B phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the B phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
The utility model adopts technique scheme will reach following technique effect:
Portable resistor-type current phase shifter of the present utility model, as: shown in Fig. 1 a, two fixed point joints of slide wire resistance meet the B of three phase network circuit, between the C phase, the sliding point joint of slide wire resistance be connected on the zero line after the primary winding is connected in series, when the sliding point of slide wire resistance moves on to C when linking to each other contact from the B contact that links to each other, primary winding voltage (being the sliding point voltage of slide wire resistance) UKN transforms to UC from UB, with reference to figure 1b polar plot as can be known, transformer voltage UKN phase place has turned over 120 °, primary winding voltage UKN is by Secondary winding of transformer output current IKN, when the sliding point of slide wire resistance moves to C when linking to each other contact from the B contact that links to each other, the output current phase place of transformer secondary output winding is also corresponding to have turned over 120 °; With transformer secondary output winding output current IKN phase place anti-phase with A phase voltage UA bit comparison mutually, just in time be as can be seen with A phase voltage UA phase place be axis of symmetry rotated ± 60 °, from electrotechnics as can be known, angle between transformer secondary output winding output current IKN phase place and the A phase voltage UA phase place promptly is equivalent to power-factor angle, example φ 1 and φ 2, so as long as change the sliding point position of slide wire resistance, just can reach the purpose that changes power-factor angle, A phase voltage UA and transformer secondary output winding output current IKN are connected on respectively on the power factor meter (single-phase), make power factor meter reflect the power factor value of needs; The size of regulating load resistance may command output current.The power factor range of adjustment is 0.5 to leading 0.5 adjusting arbitrarily that lags behind; If the A, the B that again slide wire resistance two fixed point joints are received the three phase network circuit respectively mutually between or A, C mutually between, transformer secondary output winding output current IKN phase place can reach the 360 ° of rotations generally of three kinds of situations.The saturated influence that the technical program has been eliminated inductance component in the conventional power factor regulation technology fully and brought thus, guaranteed adjustment accuracy, can debug auto power-factor compensating product to be measured more accurately, help to improve the quality of auto power-factor compensating product to be measured.
Description of drawings
Fig. 1 a is first kind of johning knot composition of the utility model portable resistor-type current phase shifter;
Fig. 1 b is the polar plot of portable resistor-type current phase shifter shown in Fig. 1 a;
Fig. 2 a is second kind of johning knot composition of the utility model portable resistor-type current phase shifter;
Fig. 2 b is the polar plot of portable resistor-type current phase shifter shown in Fig. 2 a;
Fig. 3 a is the third johning knot composition of the utility model portable resistor-type current phase shifter;
Fig. 3 b is the polar plot of portable resistor-type current phase shifter shown in Fig. 3 a.
Embodiment
A kind of portable resistor-type current phase shifter, wherein: comprise slide wire resistance, transformer, pull-up resistor, power factor meter, wherein, two fixed point joints of slide wire resistance are used to be connected first phase of three phase network circuit, between the second phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the third phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the third phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
Fig. 1 a is first kind of johning knot composition of the utility model portable resistor-type current phase shifter, the two fixed point joints of slide wire resistance R are used to be connected the B phase of three phase network circuit, between the C phase circuit, the joint of the sliding point K of slide wire resistance R connects first end of the elementary winding of transformer T, second end of the elementary winding of transformer T connects the zero line N of three phase network circuit, first end serial connection pull-up resistor r of transformer T secondary winding, reometer 1 back connects the sample rate current input end of power factor meter 2, the sample rate current output terminal of power factor meter 2 connects the sample rate current input end of auto power-factor compensating product 3 to be measured, and second end of transformer T secondary winding connects the sample rate current output terminal of auto power-factor compensating product 3 to be measured; Corresponding respectively A phase circuit, the zero line N that connects the three phase network circuit of the sampled voltage input end of power factor meter 2, zero line N joint; Corresponding respectively A phase circuit, the zero line N that connects the three phase network circuit of the sampled voltage input end of auto power-factor compensating product 3 to be measured, zero line N joint.
From Fig. 1 a as can be known, the sliding point K of slide wire resistance R moves on to C when linking to each other contact from the B contact that links to each other, and the elementary winding both end voltage of transformer T UKN transforms to UC from UB, and from polar plot 1b as can be known, the elementary winding both end voltage of transformer T UKN voltage-phase has turned over 120 °.The elementary winding both end voltage of transformer T UKN is by output current IKN behind the transformer T secondary winding, and when sliding point K moves to C when linking to each other contact from the B contact that links to each other, the phase place of output current IKN is also corresponding to have turned over 120 °.The bit comparison mutually of transformer T secondary winding output current IKN phase place is anti-phase and A phase voltage UA, just in time be as can be seen with A phase voltage UA phase place be axis of symmetry rotated ± 60 °.From electrotechnics as can be known, angle between the phase place of transformer secondary output winding output current IKN and the A phase voltage UA phase place promptly is equivalent to power-factor angle, for example φ 1 and φ 2, so as long as change the position of slide wire resistance R sliding point K, just can reach the purpose that changes power-factor angle, A phase voltage UA and transformer secondary output winding output current IKN are connected on respectively on the power factor meter (single-phase), make power factor meter reflect the power factor value of needs; The size of regulating load resistance r may command output current.The power factor range of adjustment is 0.5 to leading 0.5 adjusting arbitrarily that lags behind.
Fig. 2 a is second kind of johning knot composition of the utility model portable resistor-type current phase shifter, the two fixed point joints of slide wire resistance R are used to be connected the A phase of three phase network circuit, between the B phase circuit, the joint of the sliding point K of slide wire resistance R connects first end of the elementary winding of transformer T, second end of the elementary winding of transformer T connects the zero line N of three phase network circuit, first end serial connection pull-up resistor r of transformer T secondary winding, reometer 1 back connects the sample rate current input end of power factor meter 2, the sample rate current output terminal of power factor meter 2 connects the sample rate current input end of auto power-factor compensating product 3 to be measured, and second end of transformer T secondary winding connects the sample rate current output terminal of auto power-factor compensating product 3 to be measured; Corresponding respectively C phase circuit, the zero line N that connects the three phase network circuit of the sampled voltage input end of power factor meter 2, zero line N joint; Corresponding respectively C phase circuit, the zero line N that connects the three phase network circuit of the sampled voltage input end of auto power-factor compensating product 3 to be measured, zero line N joint.
From Fig. 2 a as can be known, the sliding point K of slide wire resistance R moves on to B when linking to each other contact from the A contact that links to each other, and the elementary winding both end voltage of transformer T UKN transforms to UB from UA, and from polar plot 2b as can be known, the elementary winding both end voltage of transformer T UKN voltage-phase has turned over 120 °.The elementary winding both end voltage of transformer T UKN is by output current IKN behind the transformer T secondary winding, when sliding point K moves to B when linking to each other contact from the A contact that links to each other, the phase place of output current IKN is also corresponding to have turned over 120 °, with transformer T secondary winding output current IKN phase place anti-phase with C phase voltage UC bit comparison mutually, just in time be as can be seen with C phase voltage UC phase place be axis of symmetry rotated ± 60 °.From electrotechnics as can be known, angle between transformer secondary output winding output current IKN phase place and the C phase voltage UC phase place promptly is equivalent to power-factor angle, for example φ 1 and φ 2, so as long as change the position of slide wire resistance R sliding point K, just can reach the purpose that changes power-factor angle, C phase voltage UC and transformer secondary output winding output current IKN are connected on respectively on the power factor meter (single-phase), make power factor meter reflect the power factor value of needs; The size of regulating load resistance r may command output current.The power factor range of adjustment is 0.5 to leading 0.5 adjusting arbitrarily that lags behind.
Fig. 3 a is the utility model portable resistor-type current phase shifter the third johning knot composition in the three phase network circuit, the two fixed point joints of slide wire resistance R are used to be connected the A phase of three phase network circuit, between the C phase circuit, the joint of the sliding point K of slide wire resistance R connects first end of the elementary winding of transformer T, second end of the elementary winding of transformer T connects the zero line N of three phase network circuit, first end serial connection pull-up resistor r of transformer T secondary winding, reometer 1 back connects the sample rate current input end of power factor meter 2, the sample rate current output terminal of power factor meter 2 connects the sample rate current input end of auto power-factor compensating product 3 to be measured, and second end of transformer T secondary winding connects the sample rate current output terminal of auto power-factor compensating product 3 to be measured; Corresponding respectively B phase circuit, the zero line N that connects the three phase network circuit of the sampled voltage input end of power factor meter 2, zero line N joint; Corresponding respectively B phase circuit, the zero line N that connects the three phase network circuit of the sampled voltage input end of auto power-factor compensating product 3 to be measured, zero line N joint.
From Fig. 3 a as can be known, the sliding point K of slide wire resistance R moves on to C when linking to each other contact from the A contact that links to each other, and the elementary winding both end voltage of transformer T UKN transforms to UC from UA, and from polar plot 3b as can be known, the elementary winding both end voltage of transformer T UKN voltage-phase has turned over 120 °.The elementary winding both end voltage of transformer T UKN is by output current IKN behind the transformer T secondary winding, when sliding point K moves to C when linking to each other contact from the A contact that links to each other, output current is also corresponding to have turned over 120 °, with transformer T secondary winding output current IKN phase place anti-phase with B phase voltage UB bit comparison mutually, just in time be as can be seen with B phase voltage UB phase place be axis of symmetry rotated ± 60 °.From electrotechnics as can be known, angle between transformer secondary output winding output current IKN phase place and the B phase voltage UB phase place promptly is equivalent to power-factor angle, for example φ 1 and φ 2, so as long as change the position of slide wire resistance R sliding point K, just can reach the purpose that changes power-factor angle, B phase voltage UB and transformer secondary output winding output current IKN are connected on respectively on the power factor meter (single-phase), make power factor meter reflect the power factor value of needs; The size of regulating load resistance r may command output current.The power factor range of adjustment is 0.5 to leading 0.5 adjusting arbitrarily that lags behind.
In sum, the portable resistor-type current phase shifter that the utility model provides, have that circuit is simple, volume is little, in light weight, easy to use, characteristics that phase shift range is wide, in concrete the use, the saturated impact that it has been eliminated inductance component fully and has brought thus, can debug more accurately auto power-factor compensating product 3 to be measured, help to improve the quality of auto power-factor compensating product 3 to be measured.
Claims (4)
1. portable resistor-type current phase shifter, it is characterized in that: comprise slide wire resistance, transformer, pull-up resistor, power factor meter, wherein, two fixed point joints of slide wire resistance are used to be connected first phase of three phase network circuit, between the second phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the third phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the third phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
2. portable resistor-type current phase shifter as claimed in claim 1, it is characterized in that: two fixed point joints of slide wire resistance are used to be connected the B phase of three phase network circuit, between the C phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the A phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the A phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
3. portable resistor-type current phase shifter as claimed in claim 1, it is characterized in that: two fixed point joints of slide wire resistance are used to be connected the A phase of three phase network circuit, between the B phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the C phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the C phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
4. portable resistor-type current phase shifter as claimed in claim 1, it is characterized in that: two fixed point joints of slide wire resistance are used to be connected the A phase of three phase network circuit, between the C phase circuit, the sliding point joint of slide wire resistance connects first end of primary winding, second end of primary winding connects the zero line of three phase network circuit, first end of Secondary winding of transformer passes through pull-up resistor, the sample rate current input end of reometer serial connection power factor meter, the sample rate current output terminal of power factor meter is used to connect the sample rate current input end of auto power-factor compensating product to be measured, second end of Secondary winding of transformer is used to connect the sample rate current output terminal of auto power-factor compensating product to be measured, the sampled voltage input end of power factor meter is used to connect the B phase circuit of three phase network circuit, and the zero line link of power factor meter is used to connect the zero line of three phase network circuit; The sampled voltage input end of auto power-factor compensating product to be measured is used to connect the B phase circuit of three phase network circuit, and the zero line link of auto power-factor compensating product to be measured is used to connect the zero line of three phase network circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202743431U CN201555868U (en) | 2009-12-07 | 2009-12-07 | Portable resistance type current phase shifter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202743431U CN201555868U (en) | 2009-12-07 | 2009-12-07 | Portable resistance type current phase shifter |
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| CN201555868U true CN201555868U (en) | 2010-08-18 |
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| CN2009202743431U Expired - Lifetime CN201555868U (en) | 2009-12-07 | 2009-12-07 | Portable resistance type current phase shifter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713803B (en) * | 2009-12-07 | 2012-05-23 | 河南省电力公司许昌供电公司 | Portable resistor-type current phase shifter |
-
2009
- 2009-12-07 CN CN2009202743431U patent/CN201555868U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713803B (en) * | 2009-12-07 | 2012-05-23 | 河南省电力公司许昌供电公司 | Portable resistor-type current phase shifter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100818 Effective date of abandoning: 20091207 |