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A control method for correcting pmsm motor compensation items

A control method and project technology, applied in the direction of motor control, motor generator control, AC motor control, etc., can solve the problem of unavoidable compensation of errors, and achieve the effects of improving control accuracy, strong adaptability and convenient production

Active Publication Date: 2019-11-22
ZHONGSHAN BROAD OCEAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a control method for correcting PMSM motor compensation items, and solve the technical problem in the prior art that the errors caused by the changes caused by the production process or the naturally changing motor parameters cannot be solved on the basis of not increasing additional hardware costs , improve the control accuracy of the motor, strong adaptability, relax the tolerance requirements during product production, thereby reducing production costs

Method used

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  • A control method for correcting pmsm motor compensation items
  • A control method for correcting pmsm motor compensation items
  • A control method for correcting pmsm motor compensation items

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Effect test

Embodiment 1

[0054] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, the present invention mentions that the PMSM motor includes a motor controller 2 and a motor body 1, and the motor body 1 includes a stator assembly 12, a rotor assembly 13 and a casing assembly 11, and the stator assembly 13 is installed on the casing assembly 11 The motor unit 1 is equipped with a Hall sensor for detecting the position of the rotor or adopts the method of detecting the phase current. The rotor assembly 13 is set on the inside or outside of the stator assembly 12. The motor controller 2 includes a control box 22 and is installed in the control box 22. Inside the control circuit board 21, the control circuit board 21 generally includes a power supply circuit, a microprocessor, a bus current detection circuit and a frequency converter. The on and off of the coil windings of each phase.

[0055] Figure 5 The inverter in the inverter can be an integrated power module (IPM) or ...

example 3

[0095] Motor 4 is designed as a 1-horsepower motor, and the motor parameters are measured: stator resistance = 1.65Ω, d-axis inductance = 26mH, q-axis inductance = 42mH, λm = 0.1582Vs, using frequency converter A, with 650ns (nanosecond) required dead time. The dead-time look-up table calculation uses the same motor production run as the inverter, but uses a calculated worst-case dead time of 1500ns. Using the same motor product (motor 4) and frequency converter A, we measure and calculate the dead zone compensation lookup table, the calculated dead zone compensation of the limit is 1500ns, and frequency converter A acts on the stator coil winding under a motor command DC voltage , the current of the stator coil winding is measured, and the measured voltage is calculated and compared with the command DC voltage to obtain the dead zone compensation value (dead zone error), according to Figure 11 The steps obtained using motor 4 and the same frequency converter A, Edt is calcu...

Embodiment 2

[0112] The present invention is a control method for correcting PMSM motor compensation items, which is characterized in that: by off-line measurement of the data of motor control errors caused by a certain parameter of the motor, and obtaining the current command and the look-up table of the compensation items based on the above-mentioned certain parameters And store it in the memory of the motor controller; start the motor to make the motor operate normally, and when the motor is running online, use the look-up table of the compensation item of a certain parameter above to correct the compensation item again to adapt to the current working condition of the motor. The purpose of precise control.

[0113] The parameter of the motor measured offline is the stator resistance, and the obtained look-up table is a look-up table corresponding to the stator resistance and the ambient temperature.

[0114] Then establish an equation λ=f(U, I, R, L, Edt, Vdt, λm) according to the elect...

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Abstract

A control method for correcting a PMSM compensation item. Data of a motor for which an error, caused by a certain parameter, occurs during control is measured in an offline manner, a lookup table of a current command and a compensation item based on the certain parameter is obtained, and the lookup table is stored in the memory of a motor controller; the motor is started so that the motor normally operates, the compensation item is re-corrected by using the lookup table of the compensation item based on the certain parameter in the online operating state of the motor to adapt to the current working condition of the motor so as to implement accurate control. The control precision of a motor is improved.

Description

Technical field: [0001] The invention relates to a control method for correcting PMSM motor compensation items. Background technique: [0002] Variable speed fans are widely used in heating, ventilation and air conditioning (HVAC). The blower is driven by a permanent magnet motor (PMSM motor), and the motor speed is controlled by a motor controller. Usually, the motor controller adopts the form of vector control or scalar control, and the control variable (rotational speed, torque, etc.) is controlled by the stator current. For these control methods to be useful, an accurate position estimate is necessary, and the motor controller can use sensor or sensorless methods to achieve this estimate. In the sensorless case, a stator flux observer can be used. The stator flux observer estimates rotor angle and permanent flux from commanded voltage and current. [0003] The motor controller has several aspects that affect the control accuracy during operation control: 1. Inverter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/24H02P25/024
CPCH02P21/14H02P21/141H02P21/24H02P25/024H02P2207/05H02P21/0025
Inventor 王继忠贾斯汀.W.卡普特
Owner ZHONGSHAN BROAD OCEAN
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