Electric bicycle antitheft control apparatus and control method

Abstract

The invention discloses an electric bicycle antitheft control apparatus and control method. The control apparatus is formed by articulating a brushless DC motor, a three-phase bridge type inverter and a single-chip microcomputer, wherein the three-phase output end of the three-phase bridge type inverter is connected with the three-phase winding of the brushless DC motor, the Hall signal outputted by the brushless DC motor is connected with the single-chip microcomputer, the output of the single-chip microcomputer is connected with the control end of each power tube in a three-phase bridge type circuit, and the single-chip microcomputer realizes control over the brushless DC motor through controlling the switching-on and switching-off of the power tubes of the three-phase bridge type inverter. The antitheft control method comprises: a user closing an electric bicycle and pulling out a key, the single-chip microcomputer entering a parking mode, the single-chip microcomputer setting a proper human dragging distance H and calculating actual dragging displacement according to the Hall signal, and when the actual displacement exceeds the alarm set value H, after one second, the single-chip microcomputer automatically controlling the brushless DC motor to reverse and the bicycle returning to an original place.

Description

technical field [0001] The invention belongs to the technical field of electronic control, and in particular relates to an anti-theft control device and a control method of an electric bicycle. Background technique [0002] The anti-theft control method of a kind of electric bicycle realized by the electronic control device is: the single-chip microcomputer judges whether the electric bicycle is artificially forced to move under the electric bicycle parking mode, and automatically returns the anti-theft control method according to the built-in program. Brushless DC motors are widely used in the market of electric vehicles and electric bicycles. The commonly used anti-theft device for electric vehicles adopts the method of controlling the corresponding thyristor on and off by the single-chip microcomputer to short-circuit the three-phase of the brushless DC motor to realize hard anti-theft. By designing the peripheral sensor of the single-chip microcomputer The circuit makes ...

AI Technical Summary

Problems solved by technology

Brushless DC motors are widely used in the market of electric vehicles and electric bicycles. The commonly used anti-theft device for electric vehicles adopts the method of controlling the corresponding thyristor on and off by the single-chip microcomputer to short-circuit the three-phase of the brushless DC motor to realize hard anti-theft. By designing the peripheral sensor of the single-chip microcomputer The circuit makes the horn send an alarm signal to realize soft anti-theft. However, this anti-theft control device is prone to "misjudgment". When pedestrians accidentally touch it or the staff arranges the parking space, it will also trigger an alarm, which affects the living environment; secondly, within the distance of the user Car thieves can still forcibly tow the car away

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