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Automatic optimization control method for permanent magnet synchronous motor

A permanent magnet synchronous motor, automatic optimization technology, applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., can solve difficult problems, achieve the effect of improving operating efficiency and realizing automatic optimal control

Active Publication Date: 2021-04-30
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, it is difficult to realize optimal control of motor efficiency in real time

Method used

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  • Automatic optimization control method for permanent magnet synchronous motor
  • Automatic optimization control method for permanent magnet synchronous motor
  • Automatic optimization control method for permanent magnet synchronous motor

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Embodiment Construction

[0019] The present invention is described in further detail as follows in conjunction with the accompanying drawings and embodiments.

[0020] refer to figure 1 , figure 2 and image 3 As shown, an automatic optimization control method for permanent magnet synchronous motor disclosed in the present invention adopts a control method combining extreme value controller and vector control, based on speed controller, current angle extreme value controller, current controller, coordinate transformation module, pulse width modulation module and other control modules are connected in sequence to form a control system. The current angle extreme value controller is located after the speed controller and before the current controller. The output of the speed controller is* is used as the input of the current angle extreme value controller. The output id* and iq* of the current angle extreme value controller are used as the input of the current controller; the current angle extreme val...

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Abstract

The invention discloses an automatic optimization control method for a permanent magnet synchronous motor. The automatic optimization control method comprises the following steps of: calculating current amplitude is according to id* and iq*, performing first filtering on the is by adopting low-pass filtering, performing superposition modulation, multiplying the output of the first filtering by a sinusoidal signal to obtain xi, performing reverse integration on the xi to obtain id, performing superposition demodulation, multiplying the ide by a second sinusoidal signal, wherein the frequencies of the two sinusoidal signals are the same, and finally, filtering the id for the second time by adopting low-pass filtering to obtain a d-axis current reference value id*, taking the id* and iq* as current reference values, participating in current loop control, and searching for an optimal current angle beta by adopting an extreme value searching method, so that minimum current loss is obtained. By adopting the automatic optimization control method, the running current of the permanent magnet synchronous motor can be automatically reduced, the running efficiency is improved, and the method is suitable for electric vehicles, hybrid electric vehicles and other transportation equipment taking the permanent magnet synchronous motor as driving power.

Description

technical field [0001] The invention belongs to the technical field of power electronic equipment and its control, and in particular relates to an automatic optimal control method for a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors are widely used in electric vehicles, ship propulsion and other fields. Commonly used three-phase permanent magnet synchronous motors are generally powered by inverters. Current sensors and position sensors collect the signals required for control and send them to the control circuit of the inverter. Calculation and adjustment are performed through the all-digital control chip to obtain the inverter The PWM drive signal of the power device controls the frequency phase and amplitude of the power supply voltage of the permanent magnet synchronous motor, and then controls its current and torque. [0003] When the permanent magnet synchronous motor is running, it is necessary to determine the di...

Claims

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Application Information

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IPC IPC(8): H02P21/22H02P27/12H02P6/28
CPCH02P21/22H02P27/12H02P6/28Y02T10/72
Inventor 朱磊何忠祥刘明
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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