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Device and method for generating an initial controller lookup table for an ipm machine

A look-up table and machine parameter technology, applied in the direction of high-speed motor control, AC motor control, control system, etc., can solve the problems of non-coverage, inaccuracy, and time-consuming of speed and torque levels

Active Publication Date: 2014-06-25
DEERE & CO
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A traditional approach uses theoretical equations to find the IPM machine operating point, which may be inaccurate
Another traditional method is to use finite element analysis to find the correct operating point, which is very time-consuming
Additionally, these traditional methods may not cover the entire operating range in terms of speed and torque levels

Method used

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  • Device and method for generating an initial controller lookup table for an ipm machine
  • Device and method for generating an initial controller lookup table for an ipm machine
  • Device and method for generating an initial controller lookup table for an ipm machine

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Embodiment Construction

[0045] Various exemplary embodiments will now be described more fully with reference to the accompanying drawings in which some exemplary embodiments are shown. The same reference numerals denote the same elements throughout the specification.

[0046] It should be understood that although the terms first, second, etc. may be used to describe various elements herein, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of example embodiments, the first element may be referred to as the second element, and, similarly, the second element may be referred to as the first element. As used herein, the term "and / or" includes any and all combinations of one or more of the listed related data.

[0047] The terms used here are only used to describe specific embodiments, and are not intended to limit the exemplary embodiments. As used herein, there is no expression that is clear...

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Abstract

Embodiments of the present invention provide a device and method for generating initial operating points for controlling an interior permanent magnet (IPM) machine. The method includes loading an inductance lookup- table (S110), first calculating a maximum torque per Ampere (MTPA) trajectory for a first threshold speed based on machine parameters of the IPM machine (S120), second calculating a truncated voltage limit ellipse with monotonicaliy increasing torque for a first speed based on the machine parameters (S130), if the first speed is higher than the first threshold speed, determining an operating trajectory at the first speed (S140) based on at least one of the calculated MTPA trajectory and the calculated truncated voltage limit ellipse, and generating an Id,; Iq map that maps an Id value and an lq value to each torque command of a plurality of torque commands for the first speed based on the determined operating trajectory (S150).

Description

Technical field [0001] Exemplary embodiments relate to an apparatus and method for generating an initial controller lookup table for controlling an internal permanent magnet (IPM) machine. Background technique [0002] Because AC machines provide higher efficiency than DC machines, AC machines are widely used in loaders or other heavy equipment machinery. The IPM of the AC machine has high transmission efficiency and a wide operating speed range for constant power area. The IPM machine controller is also called an inverter and controls the operation of the IPM machine. The controller generates a control signal that is applied to the terminal of the IPM machine. Usually, the controller controls the IPM machine based on the information or part of the information that characterizes the IPM machine. At least part of the characterization refers to the operating mode of the IPM machine that allows the input request to be converted into the desired operating output. For example, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/00
CPCH02P21/0035H02P21/0003H02P21/0025H02P21/22H02P23/009H02P21/0089
Inventor 吴隆苏简·库桑巴吴子敏付天均罗伯特·肖
Owner DEERE & CO
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