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Permanent magnet synchronous motor predicted torque control method

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor generator control, electronically commutated motor control, control system, etc., and can solve the problems of unresolved multiple setting and modification

Inactive Publication Date: 2019-04-12
NANJING YUEBO ELECTRIC DRIVE SYST CO LTD
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  • Abstract
  • Description
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Problems solved by technology

However, it does not solve the problem that the finite control set model predictive control method needs multiple adjustments and modifications on the weight coefficients of the torque component and the flux linkage component.

Method used

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  • Permanent magnet synchronous motor predicted torque control method
  • Permanent magnet synchronous motor predicted torque control method
  • Permanent magnet synchronous motor predicted torque control method

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0046] The method for controlling the predicted torque of the permanent magnet synchronous motor according to the present invention comprises the following steps:

[0047] Step 1, use the motor encoder to obtain the rotor mechanical angular velocity ω(k) and electrical angular velocity ω at the beginning of the kth control cycle of the permanent magnet synchronous motor e (k) and the rotor position electrical angle θ(k); collect permanent magnet synchronous motor DC bus voltage u dc (k) and three-phase stator current i a (k), i b (k), i c (k), and carry out coordinate transformation to obtain the current component i in the two-phase static coordinate system α-β α (k), i β (k) and the current component i in the rotating coordinate system d-q d (k) and i q (k), the conversion formula is as follows:

[0048]

[0049]

[0050] where i a (k...

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Abstract

The invention discloses a permanent magnet synchronous motor predicted torque control method and belongs to the technical field of permanent magnet synchronous motors. According to the method, first,a torque reference value is obtained according to a velocity PI controller, and a corresponding flux linkage reference value is solved through a maximum torque per ampere algorithm; the current and motor position signal collected at the starting moment of the k(th) control period are utilized to solve stator flux linkage (shown in the description) and torque (shown in the description) of a permanent magnet synchronous motor at the starting moment of the (k+2)(th) control period after different control voltage vectors act on the motor through a motor model prediction formula, and correspondingerror quantities and error coefficients under the action of different voltage vectors V<n> in the next control period are solved according to the reference value and a prediction value; and the errorcoefficients are substituted into a designed evaluation function, and then the optimal voltage vector V<n> can be solved. The method is applicable to both a constant-torque region and a constant-powerregion.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a predictive torque control method for permanent magnet synchronous motors. Background technique [0002] With the continuous introduction and improvement of new energy policies, people's expectations for the new energy industry are getting higher and higher. Permanent magnet synchronous motors have the advantages of wide speed range, high power density and high reliability, and are widely used in electric vehicles, machinery manufacturing and other fields. In recent years, the continuous development of power electronics technology has made the control technology of permanent magnet synchronous motor more and more mature. Among them, the finite control set model predictive control is a relatively new permanent magnet synchronous motor control method proposed after the vector control and direct torque control. [0003] The finite control set model pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
CPCH02P21/0003
Inventor 李占江高超蒋元广李麟陈晨
Owner NANJING YUEBO ELECTRIC DRIVE SYST CO LTD
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