Method and Device for Determining a Motor Position

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This invention provides a method and a device to accurately determine the position of a motor using three analog sinusoidal signals, each with a 120° phase difference, generated by an optical encoder. The signals are digitized, and their amplitude and phase errors are individually corrected, allowing for a precise calculation of the motor's position. The invention also proposes using configurable logic circuits (such as FPGAs) for fast and efficient processing of these tasks.

Use CasesContent extracted from patent full text and abstract with AI.

• Position tracking and feedback in industrial automation motors
• High-precision robotic arm positioning
• Motion control systems in CNC machines and 3D printers
• Any application requiring precise motor location detection such as in medical devices or laboratory automation
• Servomotor feedback for autonomous vehicles and drones

BenefitsContent extracted from patent full text and abstract with AI.

• Highly accurate and precise motor position determination by correcting both amplitude and phase errors for each signal independently
• Improved reliability and stability of motor control systems
• Simplified and efficient signal processing algorithm suitable for implementation on readily available programmable logic devices (e.g., FPGAs)
• Faster signal processing speeds thanks to hardware-based logic circuits
• Easier integration into existing digital motor control architectures and enhanced real-time capabilities

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Patent Abstract

The invention relates to a method for determining a motor position using three sinusoidal, analogue signals which are coupled to the position of the motor by means of an optical coder and which have phase differences of 120°. The invention also relates to a device for carrying out said method. The signal processing comprising at least one of the following steps, in the given order: Digitizing the analogue signal, determining an actual signal with average amplitude and calculating and outputting the motor position by means of the actual signal with average amplitude. According to the invention, corrections of the amplitude and the phase position are carried out separately for all signals.