A direct torque control device and method for a DC biased sinusoidal current motor

A direct torque control, sinusoidal current technology, applied in motor generator control, electronic commutation motor control, motor control and other directions, which can solve the problems of complex control strategy calculation process and poor dynamic response.

Active Publication Date: 2020-07-10
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] Aiming at the defects or improvement needs of the prior art, the present invention provides a direct torque control device and method for a DC biased sinusoidal current motor, aiming to solve the problems of poor dynamic response and complex control strategy calculation process in the prior art

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  • A direct torque control device and method for a DC biased sinusoidal current motor
  • A direct torque control device and method for a DC biased sinusoidal current motor
  • A direct torque control device and method for a DC biased sinusoidal current motor

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Embodiment Construction

[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0055] figure 2 A system block diagram of a direct torque control device for a DC biased sinusoidal current motor provided by the present invention, including a speed regulator 1, a torque regulator 2a, a flux regulator 2b, a zero-axis current regulator 2c, and a voltage vector selector 3. The first voltage phase shifting module 4a, the second voltage phase shifting module 4b, the first pulse width modulation module 5a, the second pulse width modulation module 5b, the inverter 6, the DC bias sinusoidal current motor 7, and the speed sensor 8 , 3 / 2 static coordinate transformation module 9 , torqu...

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Abstract

The invention discloses a direct torque control device and method for a direct-current bias sinusoidal current motor; the device comprises a speed regulator, a torque regulator, a flux linkage regulator, a 0-axis current regulator, a voltage vector selector, a first voltage phase shifting module, a second voltage phase shifting module, a first pulse width modulation module, a second pulse width modulation module, an inverter, a direct current bias sinusoidal current motor, a speed sensor and 3 / 2 static coordinate transformation module, a torque flux linkage observer and a duty ratio giving module. Aiming at the self structure characteristics of the direct-current bias sinusoidal current motor, the time for adjusting the direct-current bias current is reserved in the duty ratio giving module, so that the flexible adjustment of the direct-current bias current is realized, and the torque output capability of the direct-current bias sinusoidal current motor is effectively ensured; and meanwhile, the control system algorithm is simplified, the torque response speed of the motor is increased, and the control system is suitable for driving control of the motor.

Description

technical field [0001] The invention belongs to the field of AC motor and drive control, and more specifically relates to a direct torque control device and method for a DC bias sinusoidal current motor. Background technique [0002] Different from the traditional three-phase AC motor, the phase current of the DC bias sinusoidal current motor contains both the AC current component and the DC current component, and its waveform is as follows figure 1 shown. Among them, the DC part is used to construct the excitation magnetic field circuit, and the AC part is used to generate electromagnetic torque. The air-gap magnetic field can be flexibly adjusted by adjusting the DC bias current, so this motor has the characteristics of low cost, high reliability, and strong speed regulation ability, and has good application prospects. [0003] Direct torque control was first applied to the three-phase AC motor control system. This control method does not need to calculate the rotor posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/30H02P21/05
CPCH02P21/12H02P21/13H02P2205/07
Inventor 于子翔孔武斌曲荣海李大伟
Owner HUAZHONG UNIV OF SCI & TECH
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