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Method and system for controlling a permanent magnet synchronous motor

A synchronous motor and motor technology, applied in control systems, vector control systems, starters of a single synchronous machine, etc., can solve the problems that traditional methods are no longer applicable, and it is difficult to estimate the flux linkage.

Active Publication Date: 2012-11-21
JOHNSON CONTROLS TYCO IP HLDG LLP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when operating at low switching frequency-to-fundamental ratios and low sampling frequency-to-fundamental ratios (as is often the case for high-speed or very high-speed PMSM drives), it becomes more difficult to accurately estimate flux linkage
Therefore, traditional methods are no longer applicable

Method used

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  • Method and system for controlling a permanent magnet synchronous motor
  • Method and system for controlling a permanent magnet synchronous motor
  • Method and system for controlling a permanent magnet synchronous motor

Examples

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Embodiment Construction

[0020] figure 1 An exemplary environment for a heating, ventilation, and air conditioning (HVAC) system 10 within a building 12 is shown for use in a typical commercial setting. System 10 may include a vapor compression system 14 that may supply a refrigerated liquid that may be used to cool building 12 . System 10 may include: a boiler 16 to supply a heating liquid that may be used to heat building 12 ; and an air distribution system that circulates air through building 12 . The air distribution system may also include an air return duct 18 , air supply duct 20 and air handler 22 . Air handler 22 may include a heat exchanger connected by conduit 24 to boiler 16 and vapor compression system 14 . The heat exchanger within air handler 22 may receive heated fluid from boiler 16 or chilled fluid from vapor compression system 14 depending on the mode of operation of system 10 . The system 10 is shown with a separate air handler on each floor of the building 12, but it is underst...

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Abstract

A method is disclosed for controlling a synchronous motor by determining a rotor position of the synchronous motor based on estimating a flux linkage. The method includes applying a voltage of a stator winding of the motor to a transfer function. The transfer function includes an S-domain integration operation and an error correction variable. An output of the transfer function is processed to compensate for the error correction variable introduced in the transfer function. An estimated flux linkage is generated and an angle of the rotor position is computed based on the flux linkage. The computed rotor position is input to a controller for controlling a position or speed of the motor.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and the benefit of US Provisional Patent Application No. 61 / 311,420, filed March 8, 2010, entitled "METHOD FOR CONTROLLING A PERMANENT MAGNET SYNCHRONOUS MOTOR," which is incorporated herein by reference. Background technique [0003] The present application relates generally to motor drives for permanent magnet motors. The present application more particularly relates to methods and systems for controlling high speed permanent magnet synchronous motors (PMSM). [0004] Variable speed drives (VSDs) are used to power a variety of motor types in heating, ventilation, air conditioning and refrigeration (HVAC&R) systems. Common types of motors used in HVAC&R systems include: induction motors, switched reluctance motors, and other AC and DC motors capable of handling the torque and speed ranges required in such HVAC&R systems. [0005] Permanent magnet synchronous motors (PMSM) are particula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/18H02P21/06H02P25/02
CPCH02P21/06H02P6/18H02P6/185H02P25/023H02P6/181H02P23/14H02P25/021H02P25/024H02P25/03H02P1/52H02P21/141H02P2207/05
Inventor 吴志峤I·杰德瑞克
Owner JOHNSON CONTROLS TYCO IP HLDG LLP