Sampling triggering method, microprocessor, motor controller and electric vehicle

Abstract

The invention discloses a motor controller (120) applied to an electric vehicle (1000), a microprocessor (10) in the motor controller (120) and a sampling triggering method applied to the microprocessor (10). The microprocessor (10) is connected with the driving motor (130) through the rotary transformer (160) and used for sampling a rotary transformer feedback signal, output by the rotary transformer (160), of the electric angle of the driving motor. The sampling triggering method comprises the steps that the signal generation module (11) generates an excitation fundamental wave signal to drive the rotary transformer (160) to work; the signal processing module (12) determines an excitation symbol according to the excitation fundamental wave signal, wherein the excitation symbol is formed by alternating a high-level signal and a low-level signal; the signal processing module (12) also determines a zero crossing point signal of the excitation fundamental wave signal according to the excitation symbol; and the phase shift processing module (13) performs phase shift processing on the zero crossing point signal to obtain a sampling trigger signal so as to trigger the microprocessor (10) to sample the rotary transformer feedback signal. According to the scheme, the use of peripheral circuits of the chip is reduced, the area of the printed circuit board is further saved, and the integration level of the product is improved.

Description

technical field [0001] The present application relates to the technical field of vehicle chips, in particular to a sampling trigger method, a microprocessor, a motor controller and an electric vehicle. Background technique [0002] In the field of electric vehicles, the resolver (resolver for short) is widely used to test the rotor position and speed of the motor because of its reliable operation and strong environmental adaptability. Among them, the resolver is a sensor that accurately measures the angular position and speed of rotating parts such as motors through the magnetic coupling between the primary winding and the two secondary windings. Its primary winding and two orthogonal secondary windings are respectively installed on the rotor and stator of the motor, and the excitation signal applied to the primary winding couples out a sine feedback signal and a cosine feedback signal in the two secondary windings respectively, and the sine feedback The signal and the cosi...

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