2results about How to "Eliminate torque ripple" patented technology

The application relates to the technical field of motor control, and discloses a bearingless motor axial balance control method and system of multiple lamination units, aiming to solve the problems of missing axial adjustment dimension, poor robustness and lack of redundant support of a traditional bearingless motor. The method comprises the following steps: acquiring a rotor displacement signal in real time; a central controller calculates the magnetic force weight proportion of each stator lamination unit according to an axial displacement deviation; a distributed controller independently generates a driving current, uses a magnetic field edge effect to construct an axial gradient magnetic difference to generate a compensation force; and the switching frequency is adjusted and a harmonic component is superimposed to decouple the rotating torque. The system comprises a sensor unit, a central processing unit, a distributed execution unit and a multi-layer stator unit. According to the application, fine intervention of the axial posture is realized by actively constructing a magnetic potential difference, and the control precision, reliability and heat dissipation efficiency of the system under high-speed working conditions are significantly improved by cooperating with a redundant reconstruction strategy and heat load balancing.

The application discloses a kind of full-automatic hardware intervention method and device of pulse width modulation signal, method includes: S1, the extreme point of triangular carrier signal is set as absolute center;S2, by bottom hardware logic gate, an absolute symmetrical time execution window is automatically demarcated to two sides of absolute center;S3, when the count value enters time execution window, bottom hardware logic gate is configured to ignore current main duty cycle setting and carry out forced operation, for the level of PWM output channel is set or cleared;S4, carry out hardware level automatic flip: in successive PWM period, carry out hardware level automatic flip, for in fundamental center seamless superimposed alternating high-frequency square wave signal.The application introduces independent physical execution window and polarity automatic flip mechanism in the bottom digital logic of microcontroller timer, realizes high-frequency alternating voltage injection and accurate waveform clipping under zero CPU computing power consumption, completely eliminates phase distortion and risk of magnetic bias.