CN203607003U

CN203607003U - Teaching aid for demonstration of power supply principle of direct current power supply

Info

Publication number: CN203607003U
Application number: CN201320646502.2U
Authority: CN
Inventors: 魏广栋
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-21
Filing date: 2013-10-21
Publication date: 2014-05-21
Anticipated expiration: 2023-10-21

Abstract

The utility model discloses a teaching aid for the demonstration of the power supply principle of a direct current power supply. The teaching aid comprises a shell and power supply conducting wires, the shell is made of a PVC wire slot, a battery box is fixedly arranged in one end of the shell via two installation holes arranged at the bottom surface of the PVC wire slot and flat-head screws, the other end is provided with two installation through holes arranged on the upper surface and the lower surface of the PVC wire slot, two banana jacks penetrate from the two installation through holes, threaded holes of the two banana jacks are respectively sleeved with electrodes and nuts are screwed so that the two banana jacks are fixed, an anode conducting wire and a cathode conducting wire led out by the battery box are welded with a power supply input terminal of a DC-DC booster circuit board, an output terminal leading-out conducting wire of the DC-DC booster circuit board is respectively welded with electrodes of the first banana jack and the second banana jack, the power supply conducting wires employ red-black double-color conducting wires, and two terminals of the red-black double-color conducting wires are respectively connected with the banana jacks and alligator clips which have the same color with the conducting wires. According to the teaching aid for the demonstration of the power supply principle of the direct current power supply, the structure is simple, an alternating current rectification voltage reduction circuit is not needed, and the teaching aid is a direct current experiment power supply with security and high operationality.

Description

A kind of teaching aid of demonstrating DC power supply principle

Technical field

The utility model relates to teaching experiment system, and particularly a kind of walk away safety has the teaching aid of the demonstration DC power supply principle of higher operability.

Background technology

Power technology is important branch of modern power electronics technology, it is a kind of technology of multidisciplinary intersection, relate to have a wide range of knowlege, technical difficulty is high, but owing to lacking at present special power technology teaching practice condition and experimental facilities, cultivate the power technology talent that obtains employment specially to colleges and universities and bring certain difficulty, reduce to a certain extent the level of utilizing of China's secondary electric energy and new forms of energy, based on a kind of easy power work principle teaching aid of this present situation design, be very necessary for improving student's actual operating ability.

Summary of the invention

For addressing the above problem, the purpose of this utility model is to carry walk away safety, has a kind of teaching aid of demonstrating DC power supply principle of higher operability.

The utility model solves the technical scheme that its technical matters adopts: it comprises: shell and power lead; Described shell adopts PVC wire casing to make, one end in the enclosure, the mounting hole that is 2mm by two diameters opening in PVC wire casing bottom surface and flat head screw fixed installation battery case, the other end opens by PVC wire casing upper and lower surface the installation through hole that two diameters are 5mm, and passing the first banana bin, the second banana bin in two described installation through holes, the first banana bin, the second banana bin reach fixing object by tightening nuts be inserted in electrode respectively on its threaded hole post after; The welding of power input on the both positive and negative polarity wire that described battery case is drawn and DC-DC booster circuit plate, the output terminal of DC-DC booster circuit plate draw wire respectively with the first banana bin, the second banana bin on electrode welding; Described power lead adopts red-black double-colored wire, and the two ends of red-black double-colored wire connect respectively the banana plug homochromy with wire, crocodile clip.Described power lead adopts red-black double-colored wire, and the two ends of red-black double-colored wire connect respectively the banana plug homochromy with wire, crocodile clip.

Useful technique effect of the present utility model: utilize battery case and DC-DC booster circuit plate to realize DC power supply, it is simple in structure, without AC rectification reduction voltage circuit, has security, the direct current experimental power supply that operability is high.In the time putting into 3V lithium battery in battery case, can be by exporting 5V direct supply voltage on the crocodile clip of power lead after DC-DC booster circuit plate boosts.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the new middle DC-DC booster circuit plate circuit diagram of this practicality.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further illustrated.

With reference to Fig. 1, the utility model comprises shell 1 and power lead 2; Shell 1 adopts PVC wire casing to make, in the interior one end of shell 1, the mounting hole that is 2mm by two diameters opening in PVC wire casing bottom surface and flat head screw fixed installation battery case 3, the other end opens by PVC wire casing upper and lower surface the installation through hole that two diameters are 5mm, and install in through hole and pass the first banana bin C, the second banana bin D from two, the first banana bin C, the second banana bin D reach fixing object by be inserted in respectively the rear tightening nuts of electrode 6 on its threaded hole post 5; The welding of power input on the both positive and negative polarity wire that battery case 3 is drawn and DC-DC booster circuit plate 4, the output terminal of DC-DC booster circuit plate 4 draw wire respectively with the first banana bin C, the second banana bin D on electrode 6 weld; Power lead 2 adopts red-black double-colored wire, and the two ends of red-black double-colored wire connect respectively the banana plug homochromy with wire 7, crocodile clip 8.It is 40mm*20mm that PVC wire casing is selected cross-sectional area, and length is the long wire casing of 15cm.Electrode 6 front ends upwards bend with nose pliers, and on front end tin, convenient both positive and negative polarity wire bonds of drawing with battery case 3.

With reference to Fig. 2, DC-DC booster circuit plate 4 comprises by pre-filtering unit, partial pressure unit, soft start unit, low pressure alarming unit, inversion unit and output filtering unit and forming; Pre-filtering unit comprises and after input DC power and capacitor C 4 and capacitor C 5 are connected in parallel, forms feeder ear A after filtering, ground connection after capacitor C 4 is connected with capacitor C 5 negative pole pin; Partial pressure unit comprises after filtering that feeder ear A and resistance R 1, resistance R 2 are connected in series rear ground connection; Soft start unit comprises after filtering that feeder ear A and capacitor C 2, resistance R 5 are connected in series rear ground connection; Low pressure alarming unit comprises feeder ear A after filtering and is connected with the boost pok pin of chip U1 of DC-DC after red light emitting diodes LED, resistance R 4 series connection; Inversion unit comprises the DC-DC chip U1 that boosts, and boost clk/sel pin, the ain pin of chip U1 of DC-DC is all electrically connected with feeder ear A after filtering, ground connection after ref pin is connected with capacitor C 3, and on pin is connected between the capacitor C 2 and resistance R 6 of soft start unit; Pokin pin is connected between the resistance R 1 and resistance R 2 of partial pressure unit; The boost lxn pin of chip U1 of DC-DC is connected Hou Yi road and is connected with energy storage inductor L1 one end with lxp pin, the energy storage inductor L1 other end is connected to after filtering between feeder ear A, red light emitting diodes LED; Another road is connected with the anodal pin of diode D1, and diode D1 negative pole pin and resistance R 3, capacitor C 1 are connected in series rear ground connection; The boost out pin of chip U1 of DC-DC is connected between resistance R 3 and capacitor C 1, and pout pin is connected between diode D1 and resistance R 3, forms the voltage output end B after boosting; Output filtering unit comprise voltage output end B be connected in parallel with capacitor C 6, capacitor C 7 respectively after ground connection; DC-DC boosts, and can to adopt model be the MAX1703 chip that boosts to chip U1.

Utilize battery case and DC-DC booster circuit plate to realize DC power supply, it is simple in structure, without AC rectification reduction voltage circuit, has security, the direct current experimental power supply that operability is high.In the time putting into 3V lithium battery in battery case, can be by exporting 5V direct supply voltage on the crocodile clip of power lead after DC-DC booster circuit plate boosts.

Claims

1. demonstrate a teaching aid for DC power supply principle, it is characterized in that it comprises: shell (1) and power lead (2), described shell (1) adopts PVC wire casing to make, one end in shell (1), the mounting hole that is 2mm by two diameters opening in PVC wire casing bottom surface and flat head screw fixed installation battery case (3), the other end opens by PVC wire casing upper and lower surface the installation through hole that two diameters are 5mm, and pass the first banana bin (C) in two described installation through holes, the second banana bin (D), the first banana bin (C), the second banana bin (D) reaches fixing object by tightening nuts be inserted in respectively electrode (6) on its threaded hole post (5) after, the welding of power input on both positive and negative polarity wire and DC-DC booster circuit plate (4) that described battery case (3) is drawn, the output terminal of DC-DC booster circuit plate (4) draw wire respectively with the first banana bin (C), the second banana bin (D) on electrode (6) welding, described power lead (2) adopts red-black double-colored wire, and the two ends of red-black double-colored wire connect respectively the banana plug homochromy with wire (7), crocodile clip (8).

2. a kind of teaching aid of demonstrating DC power supply principle according to claim 1, is characterized in that: described DC-DC booster circuit plate (4) comprises by pre-filtering unit, partial pressure unit, soft start unit, low pressure alarming unit, inversion unit and output filtering unit and forming; Described pre-filtering unit comprises and after input DC power and electric capacity (C4) and electric capacity (C5) are connected in parallel, forms feeder ear A after filtering, ground connection after electric capacity (C4) is connected with electric capacity (C5) negative pole pin; Described partial pressure unit comprises after filtering that feeder ear A and resistance (R1), resistance (R2) are connected in series rear ground connection; Described soft start unit comprises after filtering that feeder ear A and electric capacity (C2), resistance (R5) are connected in series rear ground connection; Described low pressure alarming unit comprises feeder ear A after filtering and is connected with the boost pok pin of chip (U1) of DC-DC after red light emitting diodes (LED), resistance (R4) series connection; Described inversion unit comprises the DC-DC chip (U1) that boosts, boost clk/sel pin, the ain pin of chip (U1) of DC-DC is all electrically connected with feeder ear A after filtering, ground connection after ref pin is connected with electric capacity (C3), on pin is connected between the electric capacity (C2) and resistance (R6) of soft start unit; Pokin pin is connected between the resistance (R1) and resistance (R2) of partial pressure unit; The boost lxn pin of chip (U1) of DC-DC is connected Hou Yi road and is connected with energy storage inductor (L1) one end with lxp pin, energy storage inductor (L1) other end is connected between feeder ear A after filtering, red light emitting diodes (LED); Another road is connected with the anodal pin of diode (D1), and diode (D1) negative pole pin and resistance (R3), electric capacity (C1) are connected in series rear ground connection; The boost out pin of chip (U1) of DC-DC is connected between resistance (R3) and electric capacity (C1), pout pin is connected between diode (D1) and resistance (R3), forms the voltage output end B after boosting; Described output filtering unit comprise voltage output end B be connected in parallel with electric capacity (C6), electric capacity (C7) respectively after ground connection; Described DC-DC boosts, and can to adopt model be the MAX1703 chip that boosts to chip (U1).

3. a kind of teaching aid of demonstrating DC power supply principle according to claim 1, is characterized in that: it is 40mm*20mm that described PVC wire casing is selected cross-sectional area, and length is the long wire casing of 15cm.

4. a kind of teaching aid of demonstrating DC power supply principle according to claim 1, it is characterized in that: described electrode (6) front end nose pliers upwards bends, and on front end tin, convenient both positive and negative polarity wire bonds of drawing with battery case (3).