Time-Division Motor Drive With Driving Force Suppression
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Solution Overview
Problem
Existing motor systems are limited in that one motor driver can only drive a single motor at a time, preventing simultaneous operation of multiple motors.
Innovation Solution
A motor system with a motor driver, supply switch unit, output controller, switching controller, and driving force reduction suppression unit, allowing a single driver to drive multiple motors simultaneously while suppressing driving force reduction through time-division power distribution and short-circuiting non-powered motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one motor driver drives multiple motors simultaneously, then device complexity is reduced, but driving force stability deteriorates
Solution Approach 1:
The patent applies periodic action by time-division multiplexing, where the single motor driver periodically switches between driving different motors. The switching controller alternates power supply to multiple motors in sequential time slots, enabling one driver to serve multiple motors without continuous simultaneous operation. This periodic switching resolves the contradiction by allowing device simplification while maintaining functional coverage through cyclic operation.
Solution Approach 2:
The patent employs preliminary action through the driving force reduction suppression unit, which anticipates and compensates for driving force drops before they occur. When the driver switches from one motor to another, the system pre-charges or pre-positions the next motor to minimize interruption. This preliminary preparation ensures that driving force stability is maintained despite the periodic switching, resolving the contradiction between using a single driver and maintaining stable operation.
2Device complexity
If power is supplied to one motor at a time, then power distribution is simplified, but driving force reduction occurs in non-powered motors
Solution Approach 1:
The driving force reduction suppression unit applies preliminary action by preparing motors for upcoming power supply cycles. Before a motor is switched off, the system pre-charges its coils or maintains residual magnetic fields to minimize driving force decay. This preliminary preparation allows the motor to maintain operational capability during transitions, resolving the contradiction between simplified power distribution and driving force maintenance.
Solution Approach 2:
The system employs feedback mechanisms where the switching controller and driving force reduction suppression unit continuously monitor the operational state of each motor. Based on real-time feedback about motor position, speed, and driving force requirements, the controller dynamically adjusts switching timing and power distribution. This feedback loop ensures that motors are switched at optimal moments to minimize driving force reduction while maintaining simplified power distribution architecture.
Data Source
AI summary
A motor system includes a motor driver; motors that generate a driving force by power supplied by the motor driver; a supply switch that switches a circuit so that the power supplied by the motor driver is supplied to any one of the motors; an output controller that controls the motor driver so that the motor driver supplies power matched to the one motor to which the power is supplied; a switching controller that distributes the power supplied by the motor driver to the motors in a time-divisional manner by controlling the supply switch so that the one of the motors to which the power is supplied is cyclically switched; and a driving force reduction suppressor that controls suppression reduction of the driving force generated by the other of the motors while the power being supplied to one of the motors that are cyclically supplied with the power.