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Teaching demonstrating device for linear direct current voltage-stabilizing power supply

A technology of a DC regulated power supply and a demonstration device, which is applied in the electronic field, can solve the problems of output voltage drop, insufficient capacity of the DC regulated power supply, and small effect, and achieves the effect of reducing the output voltage error.

Pending Publication Date: 2018-06-26
GUANGXI POLYTECHNIC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The reasons for this are difficult for inexperienced electronic engineers, teachers and students to understand. They usually think that the capacity of the DC stabilized power supply is insufficient, resulting in a drop in output voltage at full load, and then try to increase the capacity of the DC stabilized power supply, such as using a larger transformer, Larger capacity filter capacitors and higher power adjustment tubes have little or no effect

Method used

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  • Teaching demonstrating device for linear direct current voltage-stabilizing power supply

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings.

[0011] like figure 1 As shown, a teaching demonstration device for a linear DC regulated power supply, the device includes a reference voltage regulator chip U1, an operational amplifier U2, transistors Q1 and Q2, diodes D1~D4, resistors R1~R4, adjustable resistor RV1, and one of two Switches SW1 and SW2, ports Vo+ and Vo-, ports AC1 and AC2, transformer TR1 and capacitor C1, wherein the two input terminals of transformer TR1 are respectively connected to ports AC1 and AC2, and one output terminal is connected to the anode of diode D1 and the cathode of diode D2, The other output terminal is connected to the positive pole of diode D3 and the negative pole of diode D4, the ports AC1 and AC2 are connected to 220V AC, the negative poles of diodes D1 and D3 are connected to the positive pole of capacitor C1, one end of resistor R1, the positive power supply end of operatio...

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Abstract

The invention provides a teaching demonstration device for a linear direct current voltage-stabilizing power supply. The teaching demonstration device is provided with two switches, wherein one alternative switch is used for arranging two different negative feedback voltage sampling points so as to demonstrate the influence of the two different negative feedback voltage sampling points on an output voltage error; the other alternative switch sets two different earth points for a reference voltage stabilizing chip so as to demonstrate the influence of the earth points of the reference voltage stabilizing chip on the output voltage error. The teaching demonstration device provided by the invention is applied to teaching of a direct current voltage stabilizing power supply of an electronic technology, and helps students understand how to select the negative feedback voltage sampling points and the reference voltage stabilizing chip earth points so as to reduce the output voltage error ofthe direct current voltage stabilizing power supply and obtain a good teaching effect.

Description

technical field [0001] The invention is a teaching demonstration device of a linear direct current stabilized voltage power supply, which is applied to the teaching of the content of the direct current stabilized voltage power supply in electronic technology courses and belongs to the field of electronic technology. Background technique [0002] Linear DC regulated power supplies are widely used in various electronic circuits, and are also the teaching focus of electronic technology courses. The output voltage error is an important indicator of the linear DC regulated power supply. The output voltage error includes no-load output voltage error and full-load output voltage error. If it is no-load, the no-load output voltage is equal to the design required voltage to meet the no-load output voltage error requirements, but when it is fully loaded, the output voltage often drops by more than tens of millivolts, resulting in a full-load output voltage error that does not meet the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/18
CPCG09B23/183G09B23/188
Inventor 韦忠善邓云李显圣
Owner GUANGXI POLYTECHNIC
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