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A DC motor speed measurement and control circuit

A DC motor and circuit technology, applied in the field of circuits, can solve problems such as the conflict of requirements for smooth operation, the unstable operation of the power motor, and the inability to obtain the speed in real time, so as to achieve the effect of smooth operation.

Active Publication Date: 2021-07-13
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the power motor is not running smoothly, and the speed cannot be obtained in real time. It can only be stopped once in a while, which conflicts with the requirement for the smooth operation of the centrifugal extractor.

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  • A DC motor speed measurement and control circuit
  • A DC motor speed measurement and control circuit
  • A DC motor speed measurement and control circuit

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Embodiment Construction

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0014] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope...

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Abstract

The invention discloses a DC motor speed measurement and control circuit, which includes a closed loop composed of a power supply and a DC motor, the power supply is a program-controlled power supply, and a current sampling resistor is arranged in series between the DC motor and the program-controlled power supply; The two ends of the DC motor are connected in parallel with a speed measuring circuit, the speed measuring circuit includes a speed measuring motor and a current limiting resistor arranged in series, the speed measuring motor is coaxially connected with the DC motor; the two ends of the current sampling resistor are connected in parallel An isolated operational amplifier is provided, and the output terminal of the isolated operational amplifier is connected with the MCU measurement and control system; the MCU measurement and control system is connected with the program-controlled power supply by communication. Through the measurement and control circuit, the rotational speed of the DC motor can be measured in real time, and the DC motor can be regulated to rotate smoothly according to the set rotational speed.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a DC motor speed measurement and control circuit. Background technique [0002] The nuclear micro-centrifugal extractor is an important extraction equipment in the field of nuclear fuel processing, and the drum speed of the nuclear micro-centrifugal extractor is an important working parameter. Due to the small size of the nuclear micro-centrifugal extractor, the drum requires a stable speed during starting, running and braking, and a large starting torque. Therefore, the driving motor of the drum is usually a miniature brushed DC motor. However, for the control of the rotational speed of the drum, an additional measurement and control device needs to be introduced, and the rotational speed of the drum driving motor is measured and controlled by the measurement and control device. [0003] Due to the presence of gamma radioactive radiation in nuclear applications, and the small size of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P7/18
CPCH02P7/18
Inventor 王树威段五华陈靖王建晨
Owner TSINGHUA UNIV
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