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Drive control system for elevator permanent magnet synchronous motor

A permanent magnet synchronous motor and drive control technology, applied in motor generator control, control system, electronic commutation motor control, etc. Problems such as the increase of moment observation deviation

Active Publication Date: 2020-12-08
江西上菱电梯有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control method based on load torque compensation can reduce the influence of load disturbance, but when the load torque changes, the given speed changes or the internal parameters of the control system are perturbed, the load torque observation deviation will increase, which will affect the permanent magnet Performance indicators such as steady state, dynamic and speed regulation range of synchronous motor speed control

Method used

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  • Drive control system for elevator permanent magnet synchronous motor
  • Drive control system for elevator permanent magnet synchronous motor
  • Drive control system for elevator permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] In formula (7), is the observed value of the load torque, is the rotor angular velocity estimate, g is the feedback gain of the load torque observer, k g is the sliding mode gain of the load torque observer embodiment 1, and the load torque observer embodiment 1 is a sliding mode observer. Compared with the load torque, the motor friction has a small proportion, so that B=0, ignoring the influence of friction, then the load torque observer embodiment 1 of formula (7) becomes:

[0074]

[0075] According to (6) and formula (8) when B=0, obtain the error equation of load torque observer embodiment 1 as:

[0076]

[0077] In formula (9), is the rotor angular velocity estimation error, Observing the error for the load torque, and defining the sliding surface of the observer as According to the sliding mode accessibility condition, the stability condition of the observer system in equation (8) is k g ≤-|e 2 / J|, and g<0.

Embodiment 2

[0080] Compared with the load torque, the motor friction has a small proportion, so that B=0, ignoring the influence of friction, then the load torque observer embodiment 2 of formula (10) becomes:

[0081]

[0082] In formula (10), (11), is the observed value of the load torque, is the rotor angular velocity estimate, g is the feedback gain of the load torque observer, k W is the proportional gain of the load torque observer embodiment 2, and the load torque observer embodiment 2 is a state observer. According to the formula (6) and formula (11) when B=0, the error equation of the load torque observer embodiment 2 is obtained as:

[0083]

[0084] In formula (12), is the rotor angular velocity estimation error, is the load torque observation error. The state observer of formula (11) is an autonomous linear system, at k W <0, and g<0, the observer is asymptotically stable. The formula (7) of the load torque observer embodiment 1 and the formula (10) of the l...

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Abstract

The invention discloses a drive control system for an elevator permanent magnet synchronous motor. Load torque observation adopts an algorithm that feedback gain is automatically adjusted according tothe variable quantity of a load torque given value and the variable quantity of a load torque observed value. When the system speed is changed, or parameters are changed, the load is disturbed, and the given value of the load torque or / and the observed value of the load torque is / are changed, the observation error of the load torque is quickly reduced, the observed value of the load torque is fedforward and compensated to a current regulator, therefore the control precision of the permanent magnet synchronous motor is improved.

Description

technical field [0001] The present invention relates to the technical field of permanent magnet synchronous motors, and more specifically, relates to a drive control system for permanent magnet synchronous motors of elevators. Background technique [0002] Permanent magnet synchronous motors have the advantages of high efficiency, large torque, and good speed performance, and are widely used in manufacturing, electric vehicles, industrial production and other fields. Using permanent magnet synchronous motor as elevator traction motor, its low speed, rapidity, hard mechanical characteristics, etc. are better than AC asynchronous motor, its life, energy consumption, maintainability, etc. are better than DC motor, easy to achieve low speed, large The ideal elevator drive with torque can meet the requirements of strong overload capacity and wide speed regulation range of the elevator drive. The control method based on load torque compensation can reduce the influence of load di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/05H02P21/13H02P21/20H02P25/022
CPCH02P21/0003H02P21/13H02P21/20H02P25/022H02P2207/05H02P21/18H02P27/08H02P2205/01H02P2205/07H02P21/22Y02T10/72
Inventor 黄云章凌云刘颖慧聂辉周建华王兵汤彩珍
Owner 江西上菱电梯有限公司
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