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Motor system temperature detection method and motor controller

A technology of system temperature and detection method, applied in motor generator control, electronic commutation motor control, control of electromechanical brakes, etc. Temperature monitoring and other issues to avoid damage to the motor

Pending Publication Date: 2020-06-12
NANCAL ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional soft starters can only start the motor, but cannot monitor the temperature of the motor and the soft starter's own power devices during the starting process, and cannot monitor the over-temperature of the motor or the soft starter

Method used

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  • Motor system temperature detection method and motor controller
  • Motor system temperature detection method and motor controller
  • Motor system temperature detection method and motor controller

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Embodiment Construction

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0046] figure 1 It is a flow chart of a motor system temperature detection method provided by the embodiment of the present invention. This embodiment can be applied to the situation where the temperature of the motor is monitored during the motor starting process. For example, during the motor soft start process, the stator of the motor Winding and soft starter temperature monitoring, based on the actual operation of the motor, real-time calculation of the temperature of the stator of each phase of the motor and ...

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Abstract

The embodiment of the invention discloses a motor system temperature detection method and a motor controller. The method comprises the steps: acquiring a DC component flowing through a stator windingof the motor and a DC voltage component applied to the stator winding, wherein the DC component is generated based on the DC voltage component; determining the thermal resistance of the stator windingbased on the DC voltage component and the DC current component; and determining the temperature of the stator winding based on the thermal resistance according to a first preset conversion relationship. According to the embodiment of the invention, a calculation model between the resistance and the temperature of the stator winding is established; the problem that the temperature of the motor cannot be detected in the starting process of the motor at present is solved, the temperature of the stator winding of the motor can be obtained in real time in the starting process of the motor, and therefore the situation that the motor is damaged possibly due to the fact that the temperature of the stator winding of the motor cannot be detected is avoided.

Description

technical field [0001] Embodiments of the present invention relate to motor control technology, in particular to a method for detecting the temperature of a motor system and a motor controller. Background technique [0002] The soft starter is used to realize the step-down starting of the motor, so as to reduce the current during the motor starting process, reduce the impact on the power grid and the impact on the mechanical load, and prolong the service life of the motor and mechanical equipment. The conventional soft starter can only realize the starting of the motor, but cannot monitor the temperature of the motor and the power device of the soft starter itself during the starting process, and cannot realize the over-temperature monitoring of the motor or the soft starter. Contents of the invention [0003] Embodiments of the present invention provide a motor system temperature detection method and a motor controller, so as to realize the temperature detection of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/34
CPCH02P21/14H02P21/34
Inventor 祖军赵岚于胜涛
Owner NANCAL ENERGY SAVING TECH
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