Unlock instant, AI-driven research and patent intelligence for your innovation.

Rotary Motor Control Device

A technology for rotating electrical machines and control devices, applied in motor control, AC motor control, control systems, etc., can solve problems such as no overheat protection discussion

Active Publication Date: 2019-12-20
DENSO CORP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Patent Document 1, there is no discussion on overheating protection for multiple sets of drivers and the set of coils in the control device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotary Motor Control Device
  • Rotary Motor Control Device
  • Rotary Motor Control Device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0030] exist Figure 1 to Figure 7 The rotating electric machine control device in the first embodiment of the present disclosure is shown in .

[0031] The rotary electric machine control device 10 in the first embodiment of the present disclosure is applied to the electric power steering apparatus 8 for assisting the driver's steering operation.

[0032] As for the drive unit 1 , an integral combination of two parts, namely, the motor 80 as the rotary electric machine and the rotary electric machine control device 10 serves as the drive unit 1 . The motor 80 and the rotary electric machine control device 10 may also be provided as two separate components.

[0033] Such as figure 1 As shown, the steering system 90 includes a steering wheel 91 as steering members, a steering shaft 92 , a pinion 96 , a rack shaft 97 , tires 98 , the electric power steering apparatus 8 , and the like.

[0034] The steering wheel 91 is connected to a steering shaft 92 . The steering shaft 92 ...

no. 2 approach

[0194] Based on Figure 8 and Figure 9 A second embodiment of the present disclosure will be described.

[0195] According to the present embodiment, the calculation in the temperature rise estimator 552 is different from the above-described embodiment.

[0196] Figure 8A shows the current flowing in one of the switching elements during rotation of the motor 80, and Figure 8B The current flowing in one of the switching elements during the stop time of the motor 80 is shown. In the following, the switching element 111 is used as an example.

[0197] Such as Figure 8A As shown, when the motor 80 rotates, an AC current Im having a sinusoidal waveform flows in the switching element 111 . On the other hand, if Figure 8B As shown, when the motor 80 is stopped, a substantially direct current Is flows in the switching element 111 . Therefore, the amount of heat generated in the switching element 111 is larger when the motor 80 is in a stopped state than when the motor 80 is...

no. 3 approach

[0207] exist Figure 10 A third embodiment of the present disclosure is shown in .

[0208] The rotating electrical machine control device 10 of the present embodiment is applied to the electric power steering apparatus 8 as in the above-described embodiment and controls the drive of the motor 80 that outputs assist torque.

[0209] Such as Figure 10 As shown, the rotating electrical machine control device 10 of this embodiment executes cooperative control of the motor 80 and other devices under the instruction of the vehicle controller 70 at a higher control level, for example, between the engine device, the brake device and the motor 80 Collaborative arrangements. More practically, cooperative control means controlling the vehicle for a desired operation with the cooperation of many devices such as the electric power steering apparatus 8 and other devices arranged in the vehicle. Specifically, the cooperative control includes variable transmission ratio control, automati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A rotary electric machine control device is provided. The device includes a first system controller and a second system controller, an overheating protection controller, and an abnormality detector. The thermal protection controller includes a temperature estimator and a limit current calculator. The temperature estimator estimates the system temperature as well as other temperatures, including common component temperatures of common components connected in common to two systems of the plurality of systems. The limit current calculator calculates the limit current value based on the system temperature and common part temperature. When at least one of the plurality of systems is abnormal, at least one of system temperature, common component temperature and / or limit current value is changed according to all system normal time periods.

Description

technical field [0001] The present disclosure generally relates to a rotating electrical machine control device. Background technique [0002] Conventionally, an electric power steering control device that controls an electric motor of an electric power steering device is known. For example, according to the disclosure in the patent document Japanese Patent No. 5575205 (Patent Document 1), the amount of heat generation is estimated from the amount of current to perform overheat protection. [0003] In Patent Document 1, one driver is provided for a set of three-phase circuit coils. In Patent Document 1, there is no discussion on overheating protection for multiple sets of drivers and the set of coils in the control device. Contents of the invention [0004] An object of the present disclosure is to provide a rotary electric machine control device capable of providing overheat protection when a part of a plurality of systems is abnormal. [0005] A rotating electric mach...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04H02P23/14H02P29/60
CPCH02P21/00H02P25/22B62D5/0487B62D5/0496H02P23/14H02P29/60B62D5/008B62D5/0463
Inventor 中村功一
Owner DENSO CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com