Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Induction motor control device and induction motor control method

A technology of induction motor and control device, applied in motor control, AC motor control, control device and other directions, can solve the problem of inability to suppress the torsional vibration of the drive shaft

Active Publication Date: 2015-09-02
NISSAN MOTOR CO LTD
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it becomes impossible to suppress the torsional vibration of the drive shaft

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
  • Induction motor control device and induction motor control method
  • Induction motor control device and induction motor control method
  • Induction motor control device and induction motor control method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0023] figure 1 It is a block diagram showing the configuration of the induction motor control device according to the first embodiment. This induction motor control device is applied to electric vehicles, for example. exist figure 1 shows a structural example applied to an electric vehicle. In addition, in addition to electric vehicles, for example, it can also be applied to hybrid vehicles and fuel cell vehicles.

[0024] The motor controller 7 inputs signals of various vehicle variables such as vehicle speed, accelerator opening degree, rotor position signal, and current flowing through the drive motor 1 as digital signals, and generates and controls the drive motor 1 according to various vehicle variables. A PWM signal corresponding to the PWM signal generates a drive signal for the inverter 2 through the drive circuit.

[0025] The inverter 2 has two pairs of switching elements (for example, power semiconductor elements such as IGBTs and MOS-FETs) for each phase, and ...

no. 2 Embodiment approach

[0144] When the current response is sufficiently faster than the rotor magnetic flux response, the current response estimation calculation process by the magnetic flux estimator 23 can be omitted.

[0145] Figure 8 It is a block diagram showing the detailed configuration of the magnetic flux estimator 23 of the second embodiment. The magnetic flux estimator 23 of the second embodiment has a magnetic flux response calculator 61 and a multiplier 62, and calculates the first torque command value T by the following equations (28) and (29). 1 * and rotor flux estimated value Among them, K T is a coefficient determined by the parameters of the induction motor, is the time constant of the rotor flux response.

[0146] [Formula 28]

[0147] T 1 * = K T · φ ^ · i δ ...

no. 3 Embodiment approach

[0152] When the induction motor generates torque from a state where the rotor magnetic flux is zero, a response lag in torque generation occurs due to a lag in the response of the rotor magnetic flux. In the induction motor control device according to the third embodiment, a constant amount of rotor magnetic flux is generated in advance before the motor torque command value is input.

[0153] Figure 9 It is a block diagram showing the detailed configuration of the magnetic flux estimator 23 in the third embodiment. The magnetic flux estimator 23 in the third embodiment has a magnetic flux response calculator 71, a multiplier 72, a subtractor 73, and an adder 74, and calculates the first torque command value T by the following equations (30) and (31). 1 * and rotor flux estimated value Among them, K T is a coefficient determined by the parameters of the induction motor, is the time constant of the rotor flux response. In addition, iγ 1#offset is the pre-entered γ-axis ...

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

This induction motor control device, which sets a motor torque command value on the basis of vehicle information and controls an induction motor connected to the drive wheels, calculates a first torque current command value and a first excitation current command value on the basis of the motor torque command value and estimates the rotor flux on the basis of the first excitation current command value. This device further calculates a first torque command value on the basis of the estimated rotor flux value and the first torque current command value, and calculates a second torque command value by performing filter processing on the first torque command value to remove the natural resonance frequency component of the drive shaft torque transmission system of the vehicle. This device then calculates a second torque current command value on the basis of the second torque command value and the estimated rotor flux value, and controls the driving of the motor on the basis of the first excitation current command value and the second torque current command value.

Description

technical field [0001] The invention relates to a control device and a control method of an induction motor. Background technique [0002] On pages 72-98 of "Theory and Design Practice of AC Servo System" written by Hidehiko Sugimoto, Masato Koyama, and Shinzo Tamai, a vector control for induction motors is disclosed. and torque current are adjusted to control the motor torque, wherein the flux current and torque current are converted by converting the three-phase AC current flowing through the stator of the induction motor into a power source angular frequency (= motor electrical angular frequency + rotation difference angular frequency) in a synchronous orthogonal two-axis coordinate system. Induction motor torque is proportional to the product of rotor flux and torque current, where the slip angular frequency is controlled in proportion to the ratio of torque current to rotor flux, which is accompanied by relative Due to the hysteresis of the field current, the torque c...

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 Applications(China)
IPC IPC(8): H02P27/06B60L3/00B60L15/20H02P29/00
CPCB60L15/025Y02T10/643B60L15/20Y02T10/7275H02P21/05B60L2210/40B60L2220/12B60L2240/12B60L2240/14B60L2240/421B60L2240/423B60L2240/427B60L2240/429B60L2240/529B60L2240/80B60L2250/28B60L2260/24B60L2260/26B60L2260/44B60L2270/145B60L2240/527B60L50/51Y02T10/64Y02T10/72Y02T10/70H02P21/141
Inventor 大野翔
Owner NISSAN MOTOR CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com