Motor Driving Circuit Dynamic Switching for Response Speed

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Solution Overview

Problem

Existing motor driving methods, such as those described in JP-A-2016-170004, face challenges in quickly responding to user instructions due to the inclusion of instructions in a queue, leading to delayed operations and increased power consumption.

Innovation Solution

A motor driving circuit configuration that includes a stepping motor driving circuit, a DC motor driving circuit, and a control circuit, where the control circuit prioritizes the driving of the stepping motor by temporarily suspending the DC motor and re-starting it after the stepping motor has completed its operation, allowing for immediate response to instructions without queuing and reducing peak current and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If motors are driven in a queue order, then power consumption is reduced, but the response speed to user instructions deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoidresponse speed

Core Design Contradiction:

Loss of energyVSSpeed

Solution Approach 1:

The patent implements dynamic switching between queue-based driving and immediate driving modes based on motor type and instruction priority. The control circuit dynamically adjusts the driving strategy: DC motors use queue-based driving for power efficiency, while stepping motors receive immediate driving instructions for fast response, optimizing both power consumption and response speed under different conditions

Inventive Principle:

Principle #15Dynamics

2Speed

If DC motor driving is suspended for stepping motor driving, then stepping motor response speed improves, but DC motor operation continuity deteriorates

Engineering Contradiction:

Improvestepping motor response speedVSAvoidDC motor operation continuity

Core Design Contradiction:

SpeedVSDuration of action of stationary object

Solution Approach 1:

The control circuit acts as an intermediary that manages the conflict between DC motor and stepping motor driving requests. It prioritizes stepping motor instructions by temporarily suspending DC motor driving, then automatically resumes DC motor driving after the stepping motor operation completes, ensuring both motors ultimately achieve their operational goals while maintaining system responsiveness

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11606051B2Motor driving circuit, integrated circuit device, electronic apparatus, and motor control method

Publication Date: 2023.03.14 SEIKO EPSON CORP

AI summary

A motor driving circuit includes a stepping motor driving circuit that controls driving of a stepping motor, a DC motor driving circuit that controls driving of a DC motor, and a control circuit that controls the stepping motor driving circuit and the DC motor driving circuit. The control circuit, upon accepting a driving instruction for driving the stepping motor in the middle of the DC motor driving circuit performing driving of the DC motor, stops driving of the DC motor by the DC motor driving circuit, and starts driving of the stepping motor by the stepping motor driving circuit.