An automatic optimal 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: 2022-05-17
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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Problems solved by technology
[0004] Therefore, it is difficult to realize optimal control of motor efficiency in real time
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[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 with 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 va...
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The invention discloses an automatic optimization control method of a permanent magnet synchronous motor. First, the current amplitude is is calculated according to id* and iq*, and then a low-pass filter is used to filter is for the first time, and then superimposed and modulated to output the first filter Multiply with a sinusoidal signal to get ξ, reversely integrate ξ to get id, then superimpose and demodulate, multiply ide with the second sinusoidal signal, the two sinusoidal signals have the same frequency, and finally use low-pass filtering to filter the ide first Secondary filtering to obtain the d-axis current reference value id*, using id* and iq* as the current reference value, participating in the current loop control and using the method of extreme value search to find the optimal current angle β , so that the minimum current loss is obtained; the method of the invention can automatically reduce the operating current of the permanent magnet synchronous motor and improve the operating efficiency, and is suitable for electric vehicles, hybrid vehicles and other transportation that use permanent magnet synchronous motors as driving power equipment.
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...
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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