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

Loss minimized PWM for voltage source inverters taking into account inverter non-linearity

By dynamically switching between DPWM control methods and inserting time periods into the inverter dead time, the problem of output voltage and load current distortion in the inverter is solved, achieving more efficient pulse width control and inverter loss control. minimize.

Inactive Publication Date: 2007-10-03
GM GLOBAL TECHNOLOGY OPERATIONS LLC
View PDF0 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the desired pulse width exceeds the pulse width threshold, the selection module selects a second PWM control method

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the present invention, its application or use. For clarity, the same reference numbers will be used in the drawings to identify similar elements. As used herein, the term module and / or device refers to an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated or group) that executes one or more software or firmware programs, and memory, and a combinational logic circuit , And / or other appropriate components that provide the described functions.

[0025] As described above, each of the DPWM control methods DPWM0, DPWM1, and DPWM2 optimizes a specific control operation. However, the nonlinear relationship between the voltage source inverter (VSI) and the AC motor proves the practical control limitation of the DPWM control method. For example, the selected DPWM control method may not be able to accurately contr...

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 dynamic pulse width modulation (PWM) selection device automatically switches between discontinuous PWM (DPWM) control methods. The PWM selection device comprises a PWM control module. The PWM control module determines a desired pulse width of a switching control signal according to a desired output signal. The PWM control module controls an actual pulse width of the switching control signal according to the desired pulse width and a first PWM control method. A selection module determines whether the desired pulse width exceeds a pulse width threshold. The selection module selects a second PWM control method when the desired pulse width exceeds the pulse width threshold.

Description

Technical field [0001] The present invention relates to pulse width modulation, and more specifically to selecting between pulse width modulation methods to minimize inverter losses. Background technique [0002] A voltage source inverter (VSI) is used to generate AC output voltage with controllable amplitude and frequency. VSI converts DC voltage to AC voltage to drive a three-phase AC motor. The pulse width modulation (PWM) method is used to control the operation of the VSI. The PWM control module provides high-frequency voltage pulses that control the duty cycle of one or more switches in the VSI. [0003] Referring now to FIG. 1, an example three-phase VSI 10 driving an AC motor 12 is shown. The VSI 10 includes one or more DC voltage sources 14 and 16 and switches 18-1, 18-2, 20-1, 20-2, 22-1 and 22-2. These switches are collectively referred to as a switch 24. The switch 24 is any suitable semiconductor switch known in the art, such as a transistor including an anti-parallel...

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): H02M7/48H02P27/08
CPCH02P27/04H02M2001/0048Y02B70/1491H02M1/0048Y02B70/10
Owner GM GLOBAL TECHNOLOGY OPERATIONS LLC
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