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Locked-rotor detection method, locked-rotor detection device and control system of permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and detection method, which is applied in the estimation/correction of motor parameters, etc., to achieve the effect of strong practicability, high safety and reliability

Active Publication Date: 2020-03-10
GUANGDONG WELLING ELECTRIC MACHINE MFG +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

For the situation where position sensorless control is adopted, especially the control method of torque current, it is impossible to judge whether a stall occurs by the above method of sampling phase current or mutual induction phase current

Method used

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  • Locked-rotor detection method, locked-rotor detection device and control system of permanent magnet synchronous motor
  • Locked-rotor detection method, locked-rotor detection device and control system of permanent magnet synchronous motor
  • Locked-rotor detection method, locked-rotor detection device and control system of permanent magnet synchronous motor

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Embodiment Construction

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0039] The stall detection method of the permanent magnet synchronous motor, the stall detection device of the permanent magnet synchronous motor, the control system of the permanent magnet synchronous motor, the electronic equipment and the non-transitory computer readable storage medium are described below in conjunction with the accompanying drawings. .

[0040] figure 1 It is a flow chart of a locked-rotor detection method for a permanent magnet synchronous motor according to an embodiment of the present invention. In an em...

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Abstract

The invention discloses a locked-rotor detection method, a locked-rotor detection device and a control system of a permanent magnet synchronous motor. The locked-rotor detection method comprises the steps of acquiring a phase voltage and a phase current of the permanent magnet synchronous motor; calculating the thermal power of a stator according to the phase voltage or the phase current; and judging whether the permanent magnet synchronous motor is locked or not according to the thermal power. The locked-rotor detection method provided by the embodiment of the invention makes up the defects of related technologies, can realize locked-rotor detection in a torque current control mode or a speed control mode, and is high in practicability and high in safety and reliability.

Description

technical field [0001] The present invention relates to the technical field of permanent magnet synchronous motors, in particular to a stall detection method for permanent magnet synchronous motors, a stall detection device for permanent magnet synchronous motors, a control system for permanent magnet synchronous motors, and an electronic device and a non-transitory computer readable storage medium. Background technique [0002] When the motor rotates at zero speed, it still outputs torque, that is, it stalls. There are many reasons for the motor to stall, including mechanical or man-made. For example, the contact between the rotor and the stator is stuck, the driven equipment is stuck, the equipment is too loaded and the motor cannot be driven, etc., all of which will cause the motor to stall. [0003] For the permanent magnet synchronous motor in the related art, the locked-rotor protection mainly judges the locked-rotor phenomenon of the motor by sampling the phase curre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/14
CPCH02P23/14
Inventor 程云峰
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG
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