Vector controller based on software dead-time compensation

A vector controller and dead zone compensation technology, applied in vector control systems, control electromechanical brakes, control systems, etc., can solve the problems of output current waveform distortion, PMSM torque ripple of permanent magnet synchronous motor, motor oscillation, etc. Small distortion, improve stability and reliability, and ensure the effect of effective operation

Active Publication Date: 2014-06-18
哈尔滨通联客车有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

At the same time, due to the non-ideal characteristics of the switching device, the output current waveform is distorted, causing the permanent magnet synchronous motor PMSM to be prone to torque ripple at low speed and light load, and even cause adverse consequences such as motor oscillation.

Method used

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  • Vector controller based on software dead-time compensation
  • Vector controller based on software dead-time compensation
  • Vector controller based on software dead-time compensation

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] First, if figure 1 As shown, the vector controller based on software dead zone compensation includes digital signal processor DSP7, permanent magnet synchronous motor PMSM1, resolver 2, corner position decoder 3, IGBT driving H-bridge 4, isolation circuit 5 and power supply circuit 6, Described DSP7 comprises software dead zone compensation algorithm 73, space voltage vector pulse width modulator SVPWM72 and CAN communication interface 71; Wherein, described IGBT drives H bridge 4 and described permanent magnet synchronous motor PMSM1 is connected to described permanent magnet synchronous The motor PMSM1 is driven and controlled; the rotary transformer 2 is connected with the permanent magnet synchronous motor PMSM1 to detect in real time the angular position of the rotor of the permanent magnet synchronous motor PMSM1; the angular position decoder 3 i...

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Abstract

The invention discloses a vector controller based on software dead-time compensation. The vector controller based on software dead-time compensation comprises a digital signal processor (DSP), a permanent magnet synchronous motor (PMSM), a rotary transformer, a corner position decoder and an IGBT driving H-bridge. The DSP comprises a space voltage vector pulse width modulator (SVPWM). The IGBT driving H-bridge is connected with the PMSM. The rotary transformer is connected with the corner position decoder and the PMSM. The DSP is connected with the corner position decoder. The software dead-time compensation algorithm is used for compensating for the switch-on time and the switch-off time of the SVPWM. A drive signal generated by the SVPWM controls the switch-on and switch-off of the IGBT driving H-bridge, so that the PMSM is driven. According to the vector controller based on software dead-time compensation, the dead-time compensation function is achieved based on the corner position, detected in real time, of a motor rotor, waveform distortion of the current output by a motor controller is reduced, and the stability and reliability of motor control are improved.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a vector controller based on software dead zone compensation. Background technique [0002] The space voltage vector pulse width modulator SVPWM adopts a new type of PWM control scheme, which has the characteristics of high DC voltage utilization, less harmonic loss, and low torque ripple, and is easy to be realized by a digital signal processor (DSP). Precision waveform control. Therefore, it is widely used in high-performance motor speed control systems. When the IGBT drives the H-bridge circuit to drive and control the permanent magnet synchronous motor PMSM, in order to prevent the upper and lower IGBT switches of the same bridge arm of the IGBT-driven H-bridge from being directly turned on and cause a short circuit, it is necessary to set the dead time for the IGBT. Protect. At the same time, due to the non-ideal characteristics of the switching device, the output current wav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P25/02
Inventor 刘长柱张根发冯世军刘立恒张勇
Owner 哈尔滨通联客车有限公司
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