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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.

Active Publication Date: 2017-11-10
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the motor voltage limit command value can have an error margin
If the motor voltage limit command value has an error margin, the output of the rotating motor may be insufficient due to excessive limitation of the power supply current, or an excessive power supply current may flow due to insufficient limitation of the power supply current

Method used

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  • Rotating motor controls and electric power steering equipment
  • Rotating motor controls and electric power steering equipment
  • Rotating motor controls and electric power steering equipment

Examples

Experimental program
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Effect test

no. 1 approach

[0020] will refer to figure 1 The rotating electric machine control device 1 according to the first embodiment of the present disclosure will be described. The rotary electric machine control device 1 controls the driving of an electric motor 10 as a rotary electric machine. The rotary electric machine control device 1 can be used, for example, in an electric power steering apparatus that assists a steering operation of a vehicle.

[0021] figure 2 is a diagram showing a steering system 90 including an electric power steering device 99 . The electric power steering device 99 includes a torque sensor 94 . A torque sensor 94 is attached to a steering shaft 92 connected to a steering wheel 91 . The torque sensor 94 detects the steering torque input by the driver to the steering shaft 92 via the steering wheel 91 .

[0022] Attached to one end of the steering shaft 92 is a pinion gear 96 . The pinion gear 96 meshes with the rack shaft 97 . At the end of the rack shaft 97,...

no. 2 approach

[0060] will refer to image 3 A rotating electric machine control device according to a second embodiment of the present disclosure will be described. The rotating electric machine control device according to the present embodiment has a physical configuration similar to that of the rotating electric machine control device according to the first embodiment. However, the limit gain determination section 50 according to the present embodiment determines the limit gain Glimit in a manner different from that of the first embodiment.

[0061] In the present embodiment, the limit gain determination section 50 determines the limit gain Glimit through a series of first to fourth steps described below. In the present embodiment as well, the limit gain determination section 50 repeats the series of first to fourth steps at a predetermined cycle and determines the limit gain Glimit each time.

[0062] In the first step, the limit gain determination section 50 is based on the U-phase cu...

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PUM

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/08B62D5/04H02P27/04H02P21/00H02P25/022H02P25/026
CPCB62D5/046B62D5/0481H02P29/032H02P6/28
Inventor 小林大辅
Owner DENSO CORP
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