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Patent Searching and Data


Title:
MOTOR DRIVE SYSTEM, MOTOR CONTROL SYSTEM, AND SELF-PROPELLED ROBOT
Document Type and Number:
WIPO Patent Application WO/2017/203776
Kind Code:
A1
Abstract:
[Problem] To periodically enable motor control software and an operating system to be respectively executed on the same processor. [Solution] A processor of the motor drive system comprises: first and second timers which output first and second interrupt signals, respectively, when respective threshold values are reached; and a processor core. The first timer counts at a speed equal to or at an integer multiple of that of the second timer. The processor core executes motor control software in response to the first interrupt signal, and an operating system task in response to the second interrupt signal. On the occurrence of the second interrupt signal while the motor control software is being executed, the processor core sets a count start value of the second timer to a value at which the counting speed is increased by count value D with respect to a second threshold value as a reference, or to a value at which the second threshold value is counted longer by count value D. The count value D is greater than or equal to a count value which is equivalent to a difference between the occurrence time of the second interrupt signal and the processing completion time of the motor control software.

Inventors:
ZHANG GANG (JP)
Application Number:
PCT/JP2017/007625
Publication Date:
November 30, 2017
Filing Date:
February 28, 2017
Export Citation:
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Assignee:
NIDEC CORP (JP)
International Classes:
G06F9/48; H02P29/00
Foreign References:
JP2002199766A2002-07-12
JP2002272184A2002-09-20
Attorney, Agent or Firm:
KITAMURA,Hideaki (JP)
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