Linear Motor Coil Grouping for Fewer Drivers and Simpler Control
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Solution Overview
Problem
Conventional linear drive devices waste drivers due to each coil being provided with a driver, leading to high costs and control complexity.
Innovation Solution
The linear drive device integrates at least some coils in series or parallel connections, connecting them to a driver, and uses a high-power driver to control these coils, reducing the number of drivers needed and simplifying control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each coil is provided with a driver, then precise control of each coil is achieved, but the number of drivers increases leading to high cost and high control difficulty
Solution Approach 1:
The patent segments the control system into two parts: coils requiring precise control are controlled by individual drivers, while coils not requiring precise control are grouped and controlled by a single high-power driver. This segmentation resolves the contradiction by applying different control strategies to different subsets of coils based on their specific control requirements.
Solution Approach 2:
The patent applies local quality by providing precise control only where necessary (for coils in positions requiring other workstations) and using simplified high-power control for positions where precise control is not required. This localized application of control precision reduces overall system complexity while maintaining necessary control accuracy.
2Ease of operation
If each coil is provided with a driver, then individual coil control is enabled, but the cost of the linear drive device increases
Solution Approach 1:
The patent merges multiple coils that do not require precise control into a single control group driven by one high-power driver. This merging reduces the total number of drivers required, thereby reducing cost while maintaining adequate control capability for the linear drive device.
Solution Approach 2:
The high-power driver serves multiple coils simultaneously, demonstrating multi-functionality. This universal driver can control multiple coils that do not require individual precise control, reducing the overall number of drivers needed in the system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces costs and simplifies control systems by integrating coils that do not require precise control into modules driven by a high-power driver.
Implementation Method 1
A linear drive device is a motion device used to drive a rotor to move in a straight line. The linear drive device mainly includes a stator composed of multiple coils
Implementation Method 2
a rotor sliding connected to the stator and composed of magnetic steel
Data Source
AI summary
The present disclosure provides a linear drive device, which includes: a stator including a stator body and a plurality of coils. The linear drive device further includes a rotor including a rotor body supported on the stator body, and a magnetic steel fixed on the rotor body, a first position feedback unit fixed on the rotor body, and multiple drivers. The multiple coils arranged in series or parallel are electrically connected to one of the multiple drivers, while remaining coils not arranged in series or parallel are divided into multiple groups, and multiple coils in each of the multiple groups are electrically connected to the other driver. The linear drive device further includes a controller electrically connected to the multiple drivers. The linear drive device in the present disclosure not only saves the number of drivers, but also reduces the difficulty of controlling the entire control system.