Three-phase hybrid stepping motor controller soft core based on FPGA

Abstract

The invention discloses a three-phase hybrid stepping motor controller soft core based on a FPGA; the three-phase hybrid stepping motor controller soft core employs a bipolarity SPWM modulation mode by taking digital sinusoidal signals as modulated waves and taking digital isosceles triangle signals as carrier wave signals; the soft core uses an inner DDS system as a sinusoidal signal generator, and uses an a, b, c three-phase time sharing multiplex multiplier and a sine data sheet circuit structure to form three-phase 6-path SPWM pulse output; the soft core can modulate frequency control words and a frequency division coefficient to realize refinement control and speed control, and uses an address phase-splitting module to realize steering control; the system has 13 input signals and 7 output signals; the input signals receive control word information from the host computer, and the output end outputs a three-phase 6-path SPWM control signal for the three-phase hybrid stepping motor drive system; the whole system has 12 modules. The three-phase hybrid stepping motor controller soft core can further improve the three-phase hybrid stepping motor running stability and positioning precision.

Description

technical field [0001] The invention relates to motor control, in particular to an FPGA-based soft core of a three-phase hybrid stepping motor controller. Background technique [0002] The so-called IP core or Intellectual Property (intellectual property) is a complex module that has been completed and verified. The famous American Dataquest consulting company defines semiconductor-based IP as a pre-designed circuit module in an application-specific integrated circuit ASIC or a programmable logic device FPGA / CPLD. IP cores are divided into three forms: hard core, solid core and soft core. [0003] 1. Hardcore [0004] In the form of submitted components that can be used as libraries, it is the deepest level of the IP module. Its advantage is that it is easy to implement, can be integrated into a single-chip system design, and its functions can be continuously optimized in the later stage. It has a small area and is easy to mass produce. The disadvantage is that the funct...

AI Technical Summary

Problems solved by technology

[0026] 2. out of step

This happens with sudden changes in rotor direction and braking, because the stepper motor's rotor gets too much energy and overshoots so that it loses steps

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