Realization of DC Motor Angle Control Circuit under Low Line Count Grating Based on FPGA

Abstract

The invention realizes the DC motor angle control circuit under the condition of low-line grating based on FPGA, including the FPGA control core, as the core processor of the angle control circuit, and is composed of an angle comparator, an angle feedback module and a time compensation module; the angle comparator, It is used to determine the type of the current angle, and transmit the angle type to the time compensation module; at the same time, the angle comparator synchronizes the rotation degree with the system clock through the register and inputs it to the angle feedback module; the angle feedback module is used to calculate the rotation required by the external grating. The number of lines passed, and according to the number of high levels returned by the photoelectric tube to calculate whether the rotation angle has reached the calculated threshold; the time compensation module is used for the angle category result obtained from the angle comparator. When the angle feedback module finishes working, The time compensation module performs corresponding time compensation on different types of angles to obtain the final angle rotation result. The invention realizes the angle control with high precision by using the low-line grating.

Description

technical field [0001] The invention belongs to the field of DC motor angle control, and in particular relates to a DC motor angle control circuit based on FPGA to realize low-line-number grating. Background technique [0002] FPGA is a field programmable gate array, which is the product of further development on the basis of programmable devices such as PAL, GAL, and CPLD. It appears as a semi-custom circuit in the field of application specific integrated circuits (ASIC), which not only solves the shortcomings of custom circuits, but also overcomes the shortcomings of the limited number of gate circuits of the original editable device. The circuit design completed by hardware description language (Verilog or VHDL) can be quickly programmed to FPGA for testing after simple synthesis and layout, which is the mainstream technology of modern IC design verification. These editable elements can be used to implement some basic logic gate circuits (such as AND, OR, XOR, NOT) or mo...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of poor adaptability to new angle control requirements in the prior art, high cost of high-precision control devices, and low control precision of low-line-number gratings, and provides a low-line-number grating based on FPGA. The angle control circuit of DC motor under the condition of

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