Unlock instant, AI-driven research and patent intelligence for your innovation.

Circuit used for detecting and controlling rotating speed of motor

A motor speed and circuit technology, applied in the direction of motor generator testing, excitation or armature current control, etc., can solve the problems of incapability of miniaturization, no heat sink, and inability to discharge a large amount of heat, reducing volume and maintaining stable rotation speed. Effect

Active Publication Date: 2014-02-05
STATE GRID CORP OF CHINA +1
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing motor speed monitoring and control circuits are relatively complex and large, using a lot of integral and amplifying circuits, which are prone to generate a lot of heat, and where the micro motor is used, there is no heat dissipation device, and a large amount of heat cannot be discharged. If the existing The complex circuit of the motor is bound to generate a lot of heat, affecting the motor and the circuit around the motor (resistors, capacitors, etc.)
In addition, in the prior art, there is a speed sensor used to detect the speed of the motor, but it can only be used for the control of large motors and cannot be miniaturized

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Circuit used for detecting and controlling rotating speed of motor
  • Circuit used for detecting and controlling rotating speed of motor
  • Circuit used for detecting and controlling rotating speed of motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] In order to understand the present invention and its advantages more fully, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The magnitude of the motor input current depends on the magnitude of the load torque, and the motor speed depends largely on the change of the voltage drop of the armature resistance. In the present invention, the proportional current is used to compensate the voltage drop of the armature resistance inside the motor, thereby realizing the stability of the motor speed.

[0024] Below, refer to figure 1 , the circuit for detecting and controlling the motor speed of the present invention is introduced in detail.

[0025] like figure 1 As shown, the circuit for detecting and controlling the motor speed of the present invention includes a power supply E b , the triode T r1 , T r2 , resistor R s , R 1 , R T , diode ZD, and sliding rheostat Rv. Where:...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a circuit used for detecting and controlling rotating speed of a motor. The circuit comprises an integrated circuit, a power source, resistors and a slide rheostat. The circuit is used for detecting and controlling the rotating speed of the motor. A proportional current is adopted for compensating for an IR drop of an armature inside the motor, and therefore the rotating speed of the motor is stable.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a circuit for detecting and controlling the rotational speed of a motor. Background technique [0002] With the rapid development of power electronics technology, microelectronics technology, and new motor control theory, motors have been widely used in various devices (such as speakers, toys, etc.). Due to the structure and characteristics of the motor itself, its volume will be very large, and many small devices such as audio equipment today need to add many other practical functions with the advancement of technology and the daily needs of people's lives. It is inevitable to increase the load on the motor. When the motor is loaded, its speed will be unstable, which will affect the accuracy of the entire motor and the stability of the product. Therefore, for the motor, the control of the motor speed is the prerequisite for realizing the stable operation of the motor. [0003] Th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02P7/06G01R31/34
Inventor 严敢王启银赵锐姚学武胡吉莲李学勤
Owner STATE GRID CORP OF CHINA