A current-type dimensionality reduction speed measurement method and speed measurement device for an electric bicycle
An electric bicycle and current-type technology, which is applied in the field of electric bicycle current-type dimensionality reduction speed measurement and speed measurement devices, can solve the problems of reduced system service life and low system reliability, and achieve the effect of improving reliability
Active Publication Date: 2019-11-12
HENAN NORMAL UNIV
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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 bicycle speed measurement. 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.
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[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0019] like figure 1 Shown, the present invention comprises the following steps:
[0020] The first step is to collect the electric bicycle drive motor single-phase winding current y, and go to the second step. ;
[0021] The second step is to build an observer
[0022]
[0023]
[0024]
[0025]
[0026] Among them, z is the state variable of the observer; y is the single-phase winding current of the electric bicycle driving motor; are the parameters observed by the observer; z(0) and z 0 is the initial value of the observed variable (value range is 0-1000); η is the intermediate state variable 1; is the intermediate state variable 2; η(0) and η 0 is the initial value of the intermediate variable (the value range is 0-1000); β is the control parameter (the value range is 0-10000); α is the control coefficient (the value range is 0-1...
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The present invention relates to an electric bicycle current mode dimensionality reduction 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 dimensionality reduction 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 dimensionality reduction speed measurement method and a speed measurement device of an electric bicycle whose driving motor is a permanent magnet synchronous motor. Background technique [0002] As people's concept of green travel continues to increase, electric bicycles are increasingly favored by users. In the market, permanent magnet synchronous motors are widely used as driving motors for electric bicycles due to their small size and high power density. Accurate speed measurement of electric bicycles has become one of the necessary functions of electric bicycles. 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 pa...
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IPC IPC(8): G01P3/50
CPCG01P3/50
Inventor 王立吴喜桥李雪萍
Owner HENAN NORMAL UNIV