A method of controlling power delivered to actuator assembly

CN119343519APending Publication Date: 2025-01-21CAMBRIDGE MECHATRONICS
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Patent Information

Application Number
CN202380048839.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-06-22
Filing Date
2023-06-20
Publication Date
2025-01-21

AI Technical Summary

Technical Problem

The use of non-overlapping PWM pulses in the prior art may result in a limited total power delivered by the actuator assembly, and the position of the movable portion relative to the support structure cannot be effectively controlled.

Method used

Increase the proportion of overlapping PWM pulses by scheduling the PWM control signal, including a series of PWM pulses used to drive actuation of at least four actuator components, such that the PWM pulses overlap in a series of time slots defined by the PWM frequency. Duty ratio and/or amplitude to compensate for resistance in the common connections.

Benefits of technology

This is achieved by increasing the total power delivered by the actuator assembly, reducing power losses due to resistance in common connections, and improving control accuracy of the position of the movable part.

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Abstract

A method of controlling power delivered to an actuator assembly (2), the actuator assembly (2) comprising at least four actuator components (30) arranged to move a movable portion (20) relative to a support structure (10) upon actuation, the method comprising: scheduling a PWM control signal, the PWM control signal comprises a series of PWM pulses for driving actuation of at least four actuator components, where the PWM pulses are scheduled in a series of time slots defined by a PWM frequency, each time slot being divided into a plurality of sub-time slots; and classifying the PWM pulses into pairs by width, wherein each pair of PWM pulses is scheduled in a respective sub-slot and allowed to overlap in the respective sub-slot.
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Citation Information

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