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A motor vibration reduction method based on asymmetric carrier double random modulation

A double random modulation, asymmetrical technology, applied in the direction of control generator, motor generator control, control electromechanical brake, etc.

Active Publication Date: 2021-04-30
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above control method only has the effect of suppressing the high-frequency vibration of the motor. In view of the problems in the literature, the present invention proposes a motor vibration reduction method with asymmetric carrier double random modulation, which can achieve the goal of suppressing the vibration of the motor in the full frequency band

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  • A motor vibration reduction method based on asymmetric carrier double random modulation
  • A motor vibration reduction method based on asymmetric carrier double random modulation

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Embodiment Construction

[0026] The invention provides a motor vibration reduction method with asymmetrical carrier double random modulation, and the system for realizing the method is as follows: figure 1 As shown, the rotor position detection module is used to detect the rotor position in real time, and send the output value θ to the coordinate transformation module; the phase current i A i B i C After the Clarke transformation module and the Park transformation module, the output value i d i q sent to the PI adjustment module; the Park inverse transformation module outputs u α , u β and sent to the asymmetrical carrier double random SVPWM module; the PI adjustment module respectively sets the given value i dref i qref and feedback value i d i q The difference is PI adjusted and the output value u d , u q Sent to the Park inverse transformation module, u d , u q Output u through the Park inverse transformation module α , u β And sent to the asymmetric carrier double random SVPWM module...

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Abstract

The invention discloses a motor vibration reduction method with asymmetrical carrier double random modulation. The realization system of the method includes: a voltage source inverter bridge, a permanent magnet synchronous motor, a rotor position detection module, a coordinate transformation module, a PI adjustment module, The asymmetric carrier double random SVPWM module has six parts. The asymmetric carrier double random SVPWM module includes a sector judgment module, a voltage vector calculation module, a zero vector calculation module, a random number generator, a zero vector random allocation module, a carrier generator, a modulation wave generator, and a PWM generator. Wherein, the zero vector random allocation module and the carrier generator are used to realize double random modulation, the zero vector random allocation module is used to realize random distribution of zero vectors, and the carrier generator is used to realize randomization of asymmetric carrier period. The asymmetric carrier double random method can realize the goal of suppressing the vibration of the motor in the full frequency band, and provides an effective control method for suppressing the vibration of the motor.

Description

technical field [0001] The invention relates to a motor vibration reduction method with asymmetrical carrier double random modulation, which belongs to the field of motor control. Background technique [0002] Permanent magnet synchronous motor PMSM (permanent magnet synchronous motor) has the characteristics of high efficiency, simple structure and high reliability, and is widely used in automobiles, household appliances, medical and aerospace fields. With the development of society, the vibration and noise levels of motors have been listed as an important indicator to measure their quality. PMSM variable frequency speed control system usually uses a voltage type inverter to drive the motor. The harmonic component of the voltage pulse generated by the inverter will cause the motor to generate obvious noise at the switching frequency and its multiplier. By using different control methods to change the distribution of phase current harmonics, the vibration characteristics of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/05H02P27/12
CPCH02P21/05H02P27/12
Inventor 许家群赵嗣芳殷志鹏
Owner BEIJING UNIV OF TECH