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A current-type speed measuring method and speed measuring device for an electric bicycle

A technology for electric bicycles and vehicle speed, applied to devices using electric/magnetic methods, etc., can solve the problems of low reliability of the system and reduce the service life of the system, and achieve the effect of improving reliability and solving the problem of speed measurement

Active Publication Date: 2019-11-08
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current achievements are as follows: a speed measurement system for electric bicycles is designed in the patent "A Speed ​​Measurement System for Electric Bicycles" with the authorized announcement number CN204255973U. However, the system uses photoelectric sensors, which will reduce the service life of the system when the bicycle bumps; The patent "Bicycle Speed ​​Measuring System" with the authorized announcement number CN102087297B can also realize the speed measurement of bicycles. However, this method requires a light emitting module and a light receiving module. Considering that the bicycle may run bumpy, the reliability of the system is still not high.

Method used

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  • A current-type speed measuring method and speed measuring device for an electric bicycle
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  • A current-type speed measuring method and speed measuring device for an electric bicycle

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the drawings and embodiments.

[0019] Such as figure 1 As shown, the present invention includes the following steps:

[0020] The first step is to collect the single-phase winding current y of the electric bicycle driving motor, and then go to the second step. ;

[0021] In the second step, the pole placement technique is used to design the control coefficient matrix L so that A+LC is the Hurwitz matrix. Go to the third step. among them, C=[1 0];

[0022] The third step is to build the observer

[0023]

[0024]

[0025]

[0026] among them, C=[1 0]; with These are the observer state variable 1 and state variable 2; y is the single-phase winding current of the electric bicycle drive motor; Is the parameter observed by the observer; with Is the initial value of the observed variable (the value range is 0~1000); l is the intermediate state variable; l(0) and l 0 Is the initial value of the intermed...

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Abstract

The present invention relates to an electric bicycle current mode speed measurement method and device, wherein the speed measurement device comprises a current sensor, a signal amplifier, a filter, a speed estimator and a wireless output module. The current sensor acquires a single-phase winding current of an electric bicycle driving motor, an acquired signal is processed by the signal amplifier and the filter and is sent to the speed estimator to estimate, and the electric bicycle speed is output by the wireless output module. The beneficial effect of the present invention is that: by taking an electric bicycle of which the driving motor is a permanent magnet synchronous motor as a research object, the electric bicycle current mode speed measurement method and device is provided, solves the electric bicycle speed measurement problem, and enables the reliability of a speed measurement system to be improved at the same time.

Description

Technical field [0001] The invention relates to a current-type speed measuring method and a speed measuring device for an electric bicycle whose drive motor is a permanent magnet synchronous motor. Background technique [0002] In recent years, electric bicycles have gradually become the first choice for people to travel. In the market, permanent magnet synchronous motors are widely used as electric bicycle drive motors because of their small size and high power density. Accuracy of electric bicycles has also become one of the essential functions of electric bicycles. The current achievements are: The patent "An Electric Bicycle Speed ​​Measuring System" with the authorization announcement number CN204255973U designed a speed measurement system for electric bicycles. However, the system uses photoelectric sensors, which will reduce the service life of the system when the bicycle bumps; The patent "Bicycle Speed ​​Measuring System" with the authorization announcement number CN10...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/50
CPCG01P3/50
Inventor 王立吴喜桥李雪萍
Owner HENAN NORMAL UNIV