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Control system for suppressing torque ripples of brushless direct current motor and torque ripple suppression method for control system

A brushed DC motor and motor controller technology, applied in torque ripple control, control system, electronic commutation motor control, etc. The effect of speed of response

Inactive Publication Date: 2017-05-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of torque ripple commonly existing in brushless DC motors, and the present invention provides a control system for suppressing torque ripple of brushless DC motors and a torque ripple suppression method thereof

Method used

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  • Control system for suppressing torque ripples of brushless direct current motor and torque ripple suppression method for control system
  • Control system for suppressing torque ripples of brushless direct current motor and torque ripple suppression method for control system
  • Control system for suppressing torque ripples of brushless direct current motor and torque ripple suppression method for control system

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specific Embodiment approach 1

[0050] Specific implementation mode one: see figure 1 Describe this embodiment, a brushless DC motor torque ripple suppression control system described in this embodiment includes a DC power supply U s , Sepic converter 1, voltage type inverter 2, DC voltage sampling module 3 and motor controller 4;

[0051] DC power supply U s The anode of the positive pole is connected to the positive pole input terminal of the Sepic converter 1, and the DC power supply U s The negative pole of is connected to the negative pole input terminal of Sepic converter 1;

[0052] The output end of the Sepic converter 1 is connected to the input end of the voltage type inverter 2, and the output end of the voltage type inverter 2 is connected to the three-phase winding of the controlled brushless DC motor 5;

[0053] The DC voltage sampling module 3 is used to collect the DC voltage output by the Sepic converter 1, and sends the collected DC voltage signal to the motor controller 4;

[0054] Col...

specific Embodiment approach 2

[0056] Specific implementation mode two: see figure 1 Describe this embodiment, the difference between this embodiment and the brushless DC motor torque ripple suppression control system described in the first embodiment is that the Sepic converter 1 includes an inductor L 1 , inductance L 2 , capacitance C 1 , capacitance C 2 , Diode D 1 and MOSFET tube VT 0 ;

[0057] Inductance L 1 One end of the DC power supply U s the positive connection of the

[0058] Inductance L 1 The other end of the capacitor C 1 One end and the MOSFET tube VT 0 the source connection,

[0059] Capacitance C 1 The other end of the inductor L is simultaneously 2 one end of the diode D 1 the anode connection,

[0060] Diode D 1 The cathode and capacitance C 2 One end of the diode D is connected 1 The negative electrode of is used as an output end of Sepic converter 1;

[0061] DC power supply U s The negative pole of the MOSFET tube VT at the same time 0 The drain, inductance L 2 ...

specific Embodiment approach 3

[0062] Specific implementation mode three: see figure 1 Describe this embodiment. The difference between this embodiment and the brushless DC motor torque ripple suppression control system described in Embodiment 1 or 2 is that the voltage-type inverter 2 is a three-phase voltage-type bridge Inverter, three-phase voltage type bridge inverter including 6 switching tubes VT 1 to VT 6 , and 6 switching tubes VT 1 to VT 6 Both are MOSFET tubes,

[0063] Among them, the upper bridge arm of the three-phase voltage type bridge inverter is the switching tube VT 1 , VT 3 , VT 5 , the lower bridge arm is the switching tube VT 4 , VT 6 , VT 2 ;

[0064] A diode is connected in antiparallel between the drain and source of each MOSFET,

[0065] Switch tube VT 1 to VT 6 The gates of each are used to receive the control signal output by the motor controller 4.

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Abstract

The invention discloses a control system for suppressing torque ripples of a brushless direct current motor and a torque ripple suppression method for the control system and belongs to the filed of motor control technology. The problem that existing brushless direct current motors generally have torque ripples is solved. The control system comprises a Sepic converter, a voltage inverter and a direct current voltage sampling module; the Sepic converter is used for converting a direct current source Us voltage with a constant amplitude into a direct current voltage with a variable amplitude; the voltage inverter is used for converting the direct current voltage with the variable amplitude output by the Sepic converter into an alternating current and driving the controlled brushless direct current motor; the direct current voltage sampling module is used for collecting the direct current voltage output by the Sepic converter and sending a collected direct current voltage signal to a motor controller; a Hall signal of the controlled brushless direct current motor is collected and sent to the motor controller, and the motor controller controls the work state of the Sepic converter and the voltage inverter according to the collected voltage signal and Hall signal. The control system and the method are mainly used for controlling motor torque ripples.

Description

technical field [0001] The invention belongs to the technical field of motor control. Background technique [0002] Brushless DC motor has large output torque, fast dynamic response, small inertia, high reliability and simple control, so its application is more and more extensive. But the ubiquitous torque ripple problem of brushless DC motors has always limited its application in high-precision systems. For high-precision systems, torque ripple is an important indicator to measure the performance of brushless DC motors. Therefore, it is of great significance to study the methods of suppressing or eliminating torque ripple. Contents of the invention [0003] The purpose of the invention is to solve the problem of torque pulsation commonly existing in brushless direct current motors, and the invention provides a control system for suppressing torque ripple of brushless direct current motors and a torque ripple suppression method thereof. [0004] A control system for sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/10H02P6/182
CPCH02P6/10H02P6/182
Inventor 吴晓刚李学峰侯维祥周美兰
Owner HARBIN UNIV OF SCI & TECH
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