Motor control method

Abstract

The invention discloses a motor control method. The method comprises the following steps: acquiring or initializing attribute parameters of a motor; calculating the flux linkage of the motor according to the attribute parameters of the motor and the observable measurement of the motor; calculating or / and obtaining a rotor angle of the motor according to the flux linkage of the motor; and outputting a driving signal for driving the motor according to the rotor angle of the motor. The motor control method has the beneficial effect that the motor control method capable of realizing effective driving based on the flux linkage is provided.

Description

technical field [0001] The present application relates to a motor control method, in particular, to a motor control method based on non-inductive detection. Background technique [0002] With the continuous development of the economy, the people's requirements for travel are getting higher and higher; electric mopeds are more and more popular due to their small size, lightness, environmental protection, economy and other characteristics; [0003] As one of the core components of electric bicycles, the performance of the drive motor determines whether the vehicle's power, driving comfort, battery life, etc. meet the needs of use; most of the drive motors currently used in the market are SPMSM (surface-mounted permanent Magnetic Synchronous Motor); the current mainstream control mode of SPMSM is FOC (Field Oriented Control). The core of FOC control is to first obtain the three-phase current of the stator winding and the current angle of the rotor; [0004] There are generally...

AI Technical Summary

Problems solved by technology

[0004] There are generally two ways to obtain the angle of the motor rotor in the traditional way, one is the sensory method, and the other is the non-sensory method: the sensory method is to calculate the rotor angle by collecting the characteristic value of the rotor signal through the sensor. Most of them are collected by the Hall position sensor; the non-inductive method is through the design of the observer, based on the fundamental voltage equation of the motor, by sampling the three-phase current and the real-time known emission voltage of the MCU, after various calculations and processing , to obtain the angle signal of the motor rotor; the currently known non-inductive observer algorithms applied to electric bicycles are all calculated based on the back electromotive force, but the back electromotive force has a low signal amplitude and is not easy to extract when the motor is running at low speed , so the convergence of position signal estimation at low speed is poor, resulting in limited load capacity at low speed

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