CN203950484U - Internal resistance adjustable DC motor demonstration teaching aid - Google Patents
Internal resistance adjustable DC motor demonstration teaching aid Download PDFInfo
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- CN203950484U CN203950484U CN201420349728.0U CN201420349728U CN203950484U CN 203950484 U CN203950484 U CN 203950484U CN 201420349728 U CN201420349728 U CN 201420349728U CN 203950484 U CN203950484 U CN 203950484U
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Abstract
The utility model relates to internal resistance adjustable DC motor demonstration teaching aid.Comprise base, loop A, B, simulated machine internal resistance; On described machine shaft, be wound with loop A, B, and the essence of coil and coil B is same group of coil, after the central authorities of this coil are cut off, draws two wires, connect a pair of copper semi-ring A; Resistance in described simulated machine internal resistance is adjustable, and can be plugged in a pair of simulated machine internal resistance binding post; Described D.C. voltmeter is used for measuring operating supply voltage, interior voltage, mechanical voltage.The beneficial effects of the utility model are: can demonstrate direct current generator internal resistance variation, the strong and weak variation in magnetic field, the impact of magnetic direction change on motor speed, working current, also can demonstrate magnetic pole when asymmetric for coil, the effect of attrition of machine shaft countershaft bearing; Measure supply voltage and compare with mechanical voltage, interior voltage sum, energy conservation in the time of can verifying machine operation, so the utility model is the direct current generator teaching research demonstration teaching aid that a kind of operability is very strong.
Description
Technical field
The present invention relates to teaching equipment direct current generator principle of work research field, be specifically related to a kind of internal resistance adjustable DC motor demonstration teaching aid.
Background technology
Impart knowledge to students and use DC motor model function singleness at present, majority is comprised of the stator of fixing, rotor, brush, slip ring etc., connects after constant pressure source, with constant rotational speed, rotates, for demonstrating direct current generator principle of work; But, if researching DC motor internal resistance variation, magnetic field are strong and weak, the impact of magnetic direction on motor speed, working current, just more difficult, because each parts of direct current motor model that producer sells are all fixing immovable; Also cannot measure the quantitative relationship of supply voltage and interior voltage, mechanical voltage, therefore need a kind of direct current generator for teaching research, solve the defect of some demo function deficiencies of Middle School Physics motor demonstration teaching aid existence.
Summary of the invention
For the ease of Middle School Physics motor experiment teaching research, the invention solves the defect of some demo function deficiencies of above-mentioned Middle School Physics motor demonstration teaching aid existence, direct current generator internal resistance variation, magnetic field power, the impact of magnetic direction on motor speed, working current can be demonstrated, the quantitative relationship of supply voltage and interior voltage, mechanical voltage can be measured.
The present invention adopts following technical scheme, a kind of internal resistance adjustable DC motor demonstration teaching aid, comprise base, loop A, coil B, machine shaft, a pair of shaft seating, a pair of copper semi-ring A, a pair of copper semi-ring B, a pair of brush A, a pair of brush B, a pair of magnetic pole, a pair of range adjuster, a pair of spring, a pair of simulated machine internal resistance binding post, machinery voltage determination binding post A, machinery voltage determination binding post B, a pair of power-line terminal, motor internal resistance voltage table, machinery voltage determination voltage table A, machinery voltage determination voltage table B, DC ammeter, supply voltage is measured voltage table, simulated machine internal resistance, direct supply, a pair of shaft seating has been installed on described base, between a pair of shaft seating, connect machine shaft, on machine shaft, be wound with loop A and coil B, the number of turn of described loop A equals the number of turn of coil B, and the essence of loop A and coil B is same group of coil, this coil input end is connected to a pair of copper semi-ring B, after the central authorities of this coil are cut off, draw two wires, connect a pair of copper semi-ring A, described a pair of copper semi-ring A is fixed on machine shaft, and near brush A, described brush A connects a pair of simulated machine internal resistance binding post by wire, described a pair of copper semi-ring B is fixed on machine shaft, and near brush B, described brush B connects a pair of power-line terminal by wire, described a pair of magnetic pole is positioned at the both sides of coil, magnetic direction is perpendicular to machine shaft, the N of described a pair of magnetic pole, S utmost point polarity orientation is adjustable, and the distance of they and coil can be by regulating a pair of range adjuster to change, and described a pair of spring can make a pair of magnetic pole location.
Further, described motor internal resistance voltage table is wired to a pair of simulated machine internal resistance binding post, and the resistance in described simulated machine internal resistance is adjustable, and can be plugged in a pair of simulated machine internal resistance binding post; Described DC ammeter is connected on power-line terminal, for measuring the electric current in coil working electric current or simulated machine internal resistance; Machinery voltage determination voltage table A, mechanical voltage determination voltage table B, in parallel with loop A and coil B respectively by binding post, measure respectively the mechanical voltage of two groups of coils; It is in parallel with power-line terminal that supply voltage is measured voltage table, measures general supply voltage; Motor internal resistance voltage table is in parallel with a pair of simulated machine internal resistance binding post, voltage in simulated determination coil.
Further, because the present invention adopts double brush structure, and the special connection of the employing of two groups of coils is connected in double brush, therefore, when one end connects direct supply, must plug simulated machine internal resistance, and motor could rotate; A pair of simulated machine internal resistance binding post and a pair of power-line terminal can be used in two-way exchange, i.e. direct supply connecting analog motor internal resistance binding post, and simulated machine internal resistance is connected in a pair of power-line terminal, and demonstration effect is constant.
Further, described mechanical voltage determination voltage table A, mechanical voltage determination voltage table B, by measuring voltage sum on two groups of coils, obtain mechanical voltage, by measuring voltage in simulated machine internal resistance, obtain voltage in motor, measure supply voltage and with mechanical voltage, motor in voltage sum compare, can verifying energy conservation law, this device can be measured two groups of coils machinery voltages, and this is that teaching aid institute was unmeasured in the past.
The invention has the beneficial effects as follows: in the time of can demonstrating direct current generator internal resistance and change, magnetic field strong and weakly changes, magnetic direction changes the impact on motor speed, working current, also can demonstrate magnetic pole when asymmetric for coil, the effect of attrition of machine shaft countershaft bearing; Measure supply voltage and compare with mechanical voltage, interior voltage sum, can verify that machine operation process meets energy conservation, so the present invention being the direct current generator teaching research demonstration teaching aid that a kind of operability is very strong.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is top plan view structural representation of the present invention;
Fig. 3 is direct current generator functional-block diagram of the present invention;
Wherein, 1-base, 2-loop A, 3-coil B, 4-machine shaft, 5-shaft seating, 6-copper semi-ring A, 7-copper semi-ring B, 8-brush A, 9-brush B, 10-magnetic pole, 11-range adjuster, 12-spring, the a pair of simulated machine internal resistance of 13-binding post, 14-machinery voltage determination binding post A, 15-machinery voltage determination binding post B, 16-power-line terminal 16, 17-motor internal resistance voltage table, 18-machinery voltage determination voltage table A, 19-machinery voltage determination voltage table B, 20-DC ammeter, 23-supply voltage is measured voltage table, the internal resistance of 22-simulated machine, 23-direct supply.
Embodiment
Embodiment 1, as Fig. 1, Fig. 2, shown in Fig. 3, the present invention adopts following technical scheme, a kind of internal resistance adjustable DC motor demonstration teaching aid, comprise base 1, loop A 2, coil B3, machine shaft 4, a pair of shaft seating 5, a pair of copper semi-ring A6, a pair of copper semi-ring B7, a pair of brush A8, a pair of brush B9, a pair of magnetic pole 10, a pair of range adjuster 11, a pair of spring 12, a pair of simulated machine internal resistance binding post 13, machinery voltage determination binding post A14, machinery voltage determination binding post B 15, a pair of power-line terminal 16, motor internal resistance voltage table 17, machinery voltage determination voltage table A18, machinery voltage determination voltage table B19, DC ammeter 20, supply voltage is measured voltage table 21, simulated machine internal resistance 22, direct supply 23, a pair of shaft seating 5 has been installed on described base 1, between a pair of shaft seating 5, connect machine shaft 4, on machine shaft 4, be wound with loop A 2 and coil B3, the number of turn of described loop A 2 equals the number of turn of coil B3, and the essence of loop A 2 and coil B3 is same group of coil, and its direct current resistance can be ignored, this coil input end is connected to a pair of copper semi-ring B7, after the central authorities of this coil are cut off, draw two wires, connect a pair of copper semi-ring A6, described a pair of copper semi-ring A6 is fixed on machine shaft 4, and near brush A8, described brush A8 connects a pair of simulated machine internal resistance binding post 13 by wire, described a pair of copper semi-ring B9 is fixed on machine shaft 4, and near brush B7, described brush B7 connects a pair of power-line terminal 16 by wire, described a pair of magnetic pole 10 is positioned at the both sides of coil, magnetic direction is perpendicular to machine shaft, the N of described a pair of magnetic pole 10, S utmost point polarity orientation is adjustable, and the distance of they and coil can change by a pair of range adjuster 11 of rotation, and described a pair of spring 12 can make a pair of magnetic pole 10 location.
Described motor internal resistance voltage table 17 is wired to a pair of simulated machine internal resistance binding post 13, and the resistance in described simulated machine internal resistance 22 is adjustable, and can be plugged in a pair of simulated machine internal resistance binding post 13; Described DC ammeter 20 is connected on power-line terminal 16, for measuring the electric current in coil working electric current or simulated machine internal resistance; Machinery voltage determination voltage table A, mechanical voltage determination voltage table B, in parallel with loop A and coil B respectively by binding post, measure respectively the mechanical voltage of two groups of coils; It is in parallel with power-line terminal 16 that supply voltage is measured voltage table, measures general supply voltage; Motor internal resistance voltage table 17 is in parallel with a pair of simulated machine internal resistance binding post 13, voltage in simulated determination coil.
Because the present invention adopts double brush structure, and the special connection of the employing of two groups of coils is connected in double brush, therefore, when one end connects direct supply 23, must plug simulated machine internal resistance 22, and motor could rotate; A pair of simulated machine internal resistance binding post 13 and a pair of power-line terminal 16 can be used in two-way exchange, i.e. direct supply connecting analog motor internal resistance binding post 13, and simulated machine internal resistance 22 is connected in a pair of power-line terminal 16, and demonstration effect is constant.
Described mechanical voltage determination voltage table A18, mechanical voltage determination voltage table B19, by measuring voltage sum on two groups of coils, obtain mechanical voltage, by measuring voltage in simulated machine internal resistance 22, obtain voltage in motor, measure supply voltage and with mechanical voltage, motor in voltage sum compare, energy conservation in the time of can verifying machine operation; This device can be measured two groups of coil machinery voltages, and this is that teaching aid can not be accomplished in the past.
The invention has the beneficial effects as follows: in the time of can demonstrating direct current generator internal resistance and change, magnetic is strong and weak to be changed, magnetic direction changes the impact on motor speed, working current, also can demonstrate magnetic pole when asymmetric for coil, the effect of attrition of machine shaft countershaft bearing; Measure supply voltage and compare with mechanical voltage, interior voltage sum, can verifying energy conservation law, therefore the invention provides a kind of physics teaching demonstration teaching aid, for researchist, study direct current generator that parameter changes, dynamic, determination experiment data, its operability is very strong.
Claims (3)
1. an internal resistance adjustable DC motor demonstration teaching aid, comprise base (1), loop A (2), coil B (3), machine shaft (4), a pair of shaft seating (5), a pair of copper semi-ring A (6), a pair of copper semi-ring B (7), a pair of brush A (8), a pair of brush B (9), a pair of magnetic pole (10), a pair of range adjuster (11), a pair of spring (12), a pair of simulated machine internal resistance binding post (13), machinery voltage determination binding post A (14), machinery voltage determination binding post B (15), a pair of power-line terminal (16), motor internal resistance voltage table (17), machinery voltage determination voltage table A (18), machinery voltage determination voltage table B (19), DC ammeter (20), supply voltage is measured voltage table (21), simulated machine internal resistance (22), direct supply (23), it is characterized in that: a pair of shaft seating (5) has been installed on described base (1), between a pair of shaft seating (5), connect machine shaft (4), on machine shaft (4), be wound with loop A (2) and coil B (3), the number of turn of described loop A (2) equals the number of turn of coil B (3), and the essence of loop A (2) and coil B (3) is same group of coil, this coil input end is connected to a pair of copper semi-ring B (7), after the central authorities of this coil are cut off, draw two wires, connect respectively a pair of copper semi-ring A (6), it is upper that described a pair of copper semi-ring A (6) is fixed on machine shaft (4), and near brush A (8), described brush A (8) connects a pair of simulated machine internal resistance binding post (13) by wire, described a pair of copper semi-ring B (9) is fixed on machine shaft (4), and near brush B (7), described brush B (7) connects a pair of power-line terminal (16) by wire, described a pair of magnetic pole (10) is positioned at the both sides of coil, magnetic direction is perpendicular to machine shaft (4), the N of described a pair of magnetic pole (10), S utmost point polarity orientation is adjustable, and the distance of they and coil can be by regulating a pair of range adjuster (11) to change, and described a pair of spring (12) can make a pair of magnetic pole (10) location.
2. a kind of internal resistance adjustable DC motor demonstration teaching aid according to claim 1, it is characterized in that: described motor internal resistance voltage table (17) is wired to a pair of simulated machine internal resistance binding post (13), resistance in described simulated machine internal resistance (22) is adjustable, and can be plugged in a pair of simulated machine internal resistance binding post (13), described DC ammeter (20) is connected on power-line terminal (16); Machinery voltage determination voltage table A, mechanical voltage determination voltage table B, in parallel with loop A and coil B respectively by binding post; It is in parallel with power-line terminal (16) that supply voltage is measured voltage table; Motor internal resistance voltage table (17) is in parallel with a pair of simulated machine internal resistance binding post (13).
3. a kind of internal resistance adjustable DC motor demonstration teaching aid according to claim 1, is characterized in that: when one end connects direct supply (23), must plug simulated machine internal resistance (22), motor could rotate; A pair of simulated machine internal resistance binding post (13) and a pair of power-line terminal (16) can be used in two-way exchange, it is direct supply (23) connecting analog motor internal resistance binding post (13), simulated machine internal resistance (22) is connected in a pair of power-line terminal (16), and demonstration effect is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420349728.0U CN203950484U (en) | 2014-06-28 | 2014-06-28 | Internal resistance adjustable DC motor demonstration teaching aid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420349728.0U CN203950484U (en) | 2014-06-28 | 2014-06-28 | Internal resistance adjustable DC motor demonstration teaching aid |
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| CN203950484U true CN203950484U (en) | 2014-11-19 |
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| CN201420349728.0U Expired - Fee Related CN203950484U (en) | 2014-06-28 | 2014-06-28 | Internal resistance adjustable DC motor demonstration teaching aid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143280A (en) * | 2014-06-28 | 2014-11-12 | 江苏省兴化中学 | Direct current motor demonstration teaching aid with internal resistor adjustable |
| CN111477079A (en) * | 2020-04-10 | 2020-07-31 | 杭州电子科技大学 | Brushless DC motor demonstration teaching aid |
| CN115100933A (en) * | 2022-07-15 | 2022-09-23 | 茅台学院 | BLDC motor control device |
-
2014
- 2014-06-28 CN CN201420349728.0U patent/CN203950484U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143280A (en) * | 2014-06-28 | 2014-11-12 | 江苏省兴化中学 | Direct current motor demonstration teaching aid with internal resistor adjustable |
| CN111477079A (en) * | 2020-04-10 | 2020-07-31 | 杭州电子科技大学 | Brushless DC motor demonstration teaching aid |
| CN115100933A (en) * | 2022-07-15 | 2022-09-23 | 茅台学院 | BLDC motor control device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20160628 |