Printer Transport Motor Speed Control Under Power Component Heat

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Solution Overview

Problem

Existing printers face challenges in appropriately controlling the temperature of the transport motor due to heat generated by the power reception/delivery control component, which can interfere with cooling control mechanisms.

Innovation Solution

The printer incorporates a first temperature sensor to detect the motor temperature and a second temperature sensor to detect the component temperature, with a processor adjusting the rotation speed of the transport motor based on both temperatures to manage heat generation from the power reception/delivery control component.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the printer uses a power reception/delivery control component for power management, then power reception and delivery functions are achieved, but heat is generated that interferes with temperature sensor readings and cooling control

Engineering Contradiction:

Improvepower reception/delivery functionVSAvoidheat interference with temperature control

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent divides temperature monitoring into separate zones: a first temperature sensor monitors the transport motor temperature, while a second temperature sensor monitors the power reception/delivery control component temperature. This segmentation allows independent monitoring of each component's temperature, preventing heat from the power component from interfering with the motor temperature readings and cooling control decisions.

Inventive Principle:

Principle #1Segmentation

2Temperature

If the rotation speed of the transport motor is reduced to control temperature, then motor temperature rise is reduced, but printing productivity decreases

Engineering Contradiction:

Improvemotor temperature controlVSAvoidprinting speed

Core Design Contradiction:

TemperatureVSProductivity

Solution Approach 1:

The patent implements dynamic rotation speed control where the processor adjusts the transport motor's rotation speed based on real-time temperature readings from both sensors. The system can reduce speed when temperatures approach thresholds and increase speed when cooling is effective, creating a dynamic balance between temperature control and printing productivity rather than a static reduction.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the control parameter from a fixed rotation speed to a variable rotation speed that responds to temperature conditions. By monitoring both the motor temperature and power component temperature, the system adjusts the rotation speed parameter dynamically, allowing high-speed printing when temperatures are acceptable and reducing speed only when necessary to prevent overheating.

Inventive Principle:

Principle #35Parameter changes

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 enables effective temperature control of the transport motor, preventing overheating and ensuring proper cooling, even when the power reception/delivery control component generates heat, thereby maintaining optimal printing conditions.

Implementation Method 1

a first temperature sensor configured to detect a motor temperature corresponding to a temperature of the transport motor, the motor driver, or both the transport motor and the motor driver

Methodology Applied

Scientific EffectTemperature detection:

Implementation Method 2

a second temperature sensor configured to detect a component temperature corresponding to a temperature of the power reception/delivery control component

Methodology Applied

Scientific EffectTemperature detection:

Implementation Method 3

reducing a rotation speed of the transport motor during the printing, based on at least the motor temperature and the component temperature, to reduce a rise in the motor temperature

Methodology Applied

Scientific EffectFriction heating: Friction

Implementation Method 4

heat generated from the power reception/delivery control component is transmitted to a temperature sensor of a transport motor

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS20250367955A1printer

Publication Date: 2025.12.04 BROTHER KOGYO KK

AI summary

A printer includes a transport roller, a transport motor, a motor driver, a print head, a first temperature sensor, a power reception/delivery control component, a second temperature sensor, and a processor. The first temperature sensor is configured to detect a motor temperature corresponding to a temperature of the transport motor, the motor driver, or both the transport motor and the motor driver. The second temperature sensor is configured to detect a component temperature corresponding to a temperature of the power reception/delivery control component. The processor is configured to execute driving the transport motor and the print head to perform printing on a medium, and reducing a rotation speed of the transport motor during the printing, based on at least the motor temperature and the component temperature, to reduce a rise in the motor temperature.