Rotating motor controls and electric power steering equipment

A technology for rotating electrical machines and control devices, applied in motor control, power steering mechanism, electric steering mechanism, etc., can solve the problems of error margin, excessive power supply current, insufficient output of rotating electrical machines, etc.
CN104052344BActive Publication Date: 2017-11-10DENSO CORP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
DENSO CORP
Publication Date
2017-11-10

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Abstract

The present invention relates to a rotary electric machine control device and an electric power steering apparatus. In the rotary electric machine control device, a voltage command value calculation section (41, 42, 43, 44) calculates a voltage command value based on a current command value and a motor current. An inverter power estimating section (50) estimates inverter power based on motor current. A power supply current estimating section (50) estimates the power supply current based on the inverter power and the power supply voltage. A limit gain determination section (50) determines a current value of the limit gain based on a power supply current, a target power supply current, and a previous value of the limit gain. A limited voltage command value calculation section (50) calculates a limited voltage command value based on the voltage command value and the limit gain. The current limiting section (46, 47) can limit the power supply current by outputting a command value corresponding to the limited voltage command value to the inverter section.
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Description

technical field

[0001] The present disclosure relates to a rotary electric machine control device and an electric power steering apparatus including the rotary electric machine control device. Background technique

[0002] Generally, there is known a rotary electric machine control device that limits the power supply current flowing from the power supply to the inverter unit and controls the drive of the rotary electric machine. For example, the rotating electric machine control device disclosed in JP-A-2011-125134 limits heat generation on the power supply path and breakdown of switching elements in the inverter section by limiting the power supply current. In addition, the rotary electric machine control device disclosed in JP-A-2011-125134 is used as a control device for a rotary electric machine in an electric power steering system in a vehicle to limit the impact of excessive current consumption by the rotary electric machine on other components in the vehicle. system ...

Claims

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