Electric bicycle sine wave control method based on non-sensor hub type motor

Abstract

The invention discloses an electric bicycle sine wave control method based on a non-sensor hub type motor. Firstly, a counter potential zero crossing point of the motor is obtained by the adoption of a terminal voltage detection method, the rotor position of the motor is obtained after position estimation, then a drive signal of a three-phase inverter is obtained through a space vector modulation strategy through the rotor position and the output mu of a controller, and the motor is driven to operate. Compared with a traditional control scheme, a control scheme of a non-position-sensor permanent magnet motor is higher in efficiency, the energy of a battery of an electric bicycle is saved, and the driving mileage is increased; compared with other control schemes without position sensors, the control scheme of the non-sensor permanent magnet motor is simple in design principle, low in requirement for microprocessors, good in adaptability and easy to popularize.

Description

technical field [0001] The invention relates to the field of control methods for electric bicycles, in particular to a sine wave control method for electric bicycles based on a sensorless hub motor. Background technique [0002] Permanent magnet brushless DC motor is a new type of DC motor developed with the rapid development of electronic technology. It has a series of advantages such as simple structure, reliable operation, convenient maintenance, high efficiency, no excitation loss and good speed regulation performance. , Widely used in aerospace, household appliances, instrumentation, chemical industry, medical equipment and other industrial fields. [0003] Position sensorless control technology has always been one of the hotspots in the research of permanent magnet motors. Many scholars at home and abroad have carried out relevant research on this and achieved initial results. Position sensorless technology generally refers to the use of physical quantities that can b...

AI Technical Summary

Problems solved by technology

However, since the stator current and the air gap flux are square waves or trapezoidal waves, the torque ripple is large, the mute effect is poor, and the motor control efficiency is not high.

However, some of the existing control methods are based on square wave control to compensate the motor current, which cannot fundamentally eliminate pulsation and reduce noise; Low; there are also magnetic field oriented control methods, which have higher requirements on single-chip microcomputers, and the algorithms are very complicated, which is not conducive to actual operation.

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