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Built-in permanent magnet synchronous motor direct torque control energy-saving frequency converter and its construction method

A technology of permanent magnet synchronous motor and direct torque control, which is applied in motor control, motor generator control, AC motor control, etc., and can solve the problems that high performance and high efficiency cannot be taken into account

Active Publication Date: 2021-07-16
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes an energy-saving frequency converter and a construction method of a built-in permanent magnet synchronous motor direct torque control drive system. By constructing the optimal stator flux calculation module and putting it into the direct torque control drive system, the operating efficiency and control response speed of the built-in permanent magnet synchronous motor can be improved

Method used

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  • Built-in permanent magnet synchronous motor direct torque control energy-saving frequency converter and its construction method
  • Built-in permanent magnet synchronous motor direct torque control energy-saving frequency converter and its construction method
  • Built-in permanent magnet synchronous motor direct torque control energy-saving frequency converter and its construction method

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Embodiment 1

[0117] Control attached Figure 7 , The energy-saving frequency conversion controller adopts the digital signal processor (DSP) to realize through software programming. The DSP controller adopts the motor control special chip TMS320F2812 of TI Company, the power inverter adopts the intelligent power module PS21865 of Mitsubishi Company, and the Hall sensor adopts two LM25-NP and one LV25-NP of Swiss LEM Company. The model of the AC permanent magnet synchronous motor is 130SFM_E050254, and its parameters are: P N =1.3kW, rated voltage U N =220V, rated speed n N =2500r / min, rated torque T N =5Nm, stator resistance R s =1.35Ω, core loss resistance R fe =305Ω, stator d-axis inductance L d =7.76mH, stator q-axis inductance L q =17mH, rotor inertia J=0.003kg·m 2 , Viscous friction coefficient b = 0.001Nm·s.

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Abstract

The invention relates to a built-in permanent magnet synchronous motor direct torque control energy-saving frequency converter, which includes a permanent magnet synchronous motor energy-saving frequency conversion controller and a permanent magnet synchronous motor power converter. The equivalent circuit model of the built-in permanent magnet synchronous motor with loss is given, and the stator flux solution method with high operating efficiency and low power consumption is given when the output torque and speed of the motor are constant, and the optimal stator flux calculation module is constructed. The optimal stator flux calculation module is embedded in the direct torque control drive system to realize high-efficiency and fast-response control of the built-in permanent magnet synchronous motor. Advantages: 1) Significantly reduce the power loss of the motor in light-load operation, and improve the comprehensive performance of the motor drive system in the full speed regulation range. The structure is simple, the operation is reliable, and the cost is low; 2) It is suitable for driving applications of permanent magnet synchronous motors that are often in a light-load operation state or that the load changes frequently.

Description

technical field [0001] The invention relates to a built-in permanent magnet synchronous motor direct torque control energy-saving frequency converter and a construction method, belonging to the technical field of electric drive control equipment. Background technique [0002] The built-in permanent magnet synchronous motor (IPMSM) has the advantages of high power density, high power factor, low loss, low operating noise and reliable operation, and is widely used in high-performance motor speed control systems. For a high-performance motor speed control system, the operating efficiency of the motor is an important performance indicator. In order to improve the operating efficiency of the motor, in addition to optimizing the design of the motor body, the use of efficiency optimization control technology for different operating conditions of the motor is an effective way to improve the operating efficiency of the motor. The permanent magnet synchronous motor has high efficienc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/06H02P21/12H02P6/34H02P25/024
CPCH02P21/12H02P27/06H02P2207/05H02P6/34H02P25/024
Inventor 张兴华朱超生孙振兴
Owner NANJING TECH UNIV
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