MTPA control method of built-in PMSM and MTPA control system

A technology of permanent magnet synchronous motor and control method, applied in control system, vector control system, motor generator control and other directions, can solve the problems of low efficiency and precision, and achieve the goal of improving efficiency, shortening the length of search interval, and improving test efficiency. Effect

Active Publication Date: 2016-01-20
NANJING ESTUN AUTOMATION CO LTD
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Problems solved by technology

[0008] The problem to be solved by the present invention is: the efficiency and precision of the existing built-in permanent magnet synchronous motor MTPA algorithm are low and cannot meet the demand, and a new MTPA algorithm with higher efficiency and precision is required

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  • MTPA control method of built-in PMSM and MTPA control system
  • MTPA control method of built-in PMSM and MTPA control system

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Embodiment Construction

[0033] In order to solve the problem of low efficiency and precision of the existing MTPA algorithm of the built-in permanent magnet synchronous motor, the present invention proposes an MTPA experimental method based on variable interval search and binary quadratic polynomial fitting to achieve higher efficiency and precision MTPA algorithm. The experimental method is a general term, which is different from the theoretical formula method and the simulation method. For example, the document 2 mentioned in the background technology adopts an experimental method based on another mechanism. The present invention proposes a new variable interval search method , improve the efficiency of the MTPA algorithm, combined with binary quadratic polynomial fitting, to solve the problems of the prior art. Bivariate quadratic polynomial fitting is a basic mathematical method and will not be described in detail.

[0034] The present invention comprises the following steps:

[0035] Step 1: D...

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Abstract

The invention relates to an MTPA control method of a built-in PMSM (Permanent magnet synchronous motor) and an MTPA control system. According to the method, an optimal theoretic torque angle of stator current discrete spots and rotating speed discrete spots is calculated, a variable search zone is divided, a torque angle outputting a largest torque is searched in the variable search zone and is taken as an optimal actually-measured torque angle, binary quadratic polynomial fitting for a series of optimal actually-measured torque angles is carried out to acquire a fitting formula of an optical algorithm torque angle, a direct-axis current given Id<*> and an alternative-axis current given Iq<*> of a motor under a stator current Is are calculated according to the optical algorithm torque angle and the stator current Is and are utilized as current ring givens of the built-in PMSM. Through the MTPA control method based on variable zone search and binary quadratic polynomial fitting, higher efficiency and precision are realized.

Description

technical field [0001] The invention belongs to the technical field of AC servo control, and relates to the maximum torque current ratio (maximumtorqueperampere, MTPA) of a built-in permanent magnet synchronous motor. MTPA control method for permanent magnet synchronous motor. Background technique [0002] In recent years, interior permanent magnet synchronous motor (IPMSM) has been widely used in high-efficiency, high-density, wide-speed adjustable traction drive applications such as industrial robots and electric vehicles. Compared with surface mounted permanent magnet synchronous motor (SPMSM), IPMSM has the advantages of high efficiency, high power density, low noise, and strong robustness. [0003] Different from SPMSM, IPMSM has the characteristic that the inductance of the orthogonal and direct axis is not equal, so in the output torque of IPMSM, there is reluctance torque in addition to the electromagnetic torque. In order to make full use of the reluctance torque ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P25/02
Inventor 吴超齐丹丹孙园园吴波
Owner NANJING ESTUN AUTOMATION CO LTD
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