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DC brushless motor torsion compensation process and system

A brushless DC, torque compensation technology, applied in the direction of DC motor speed/torque control, control system, torque ripple control, etc., can solve the problems of noise, vibration, torque discontinuity, etc.

Inactive Publication Date: 2008-05-14
SUNPLUS TECH CO LTD
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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 solve the problem of noise and vibration caused by torque discontinuity in the control system of a brushless DC motor with an asymmetric load during operation

Method used

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  • DC brushless motor torsion compensation process and system
  • DC brushless motor torsion compensation process and system
  • DC brushless motor torsion compensation process and system

Examples

Experimental program
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Embodiment Construction

[0017] reference figure 1 , Is a schematic diagram of a known DC brushless motor control system. First, the AC voltage is connected to an AC / DC converter (DC / AC Converter) 10 through the AC voltage input terminal to generate a DC output voltage (Vo), which is stabilized by a capacitor (C) and then supplied to the DC / AC The power input terminal of the inverter circuit (DC / AC Inverter) 20, wherein the first power input terminal is connected to the DC output voltage (Vo), and a protection resistor ( Rshunt). Furthermore, the control unit (Micro Control Unit, MCU) 30 can provide multiple control signals to the DC / AC inverter circuit 20, so that the DC / AC inverter circuit 20 generates three-phase drive currents (U, V, W) and outputs them to The three-phase DC brushless motor 50 rotates the DC brushless motor 50. The position detection circuit 40 is connected to the three-phase drive current output terminal to determine the rotor position of the DC brushless motor 50, and the control u...

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PUM

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Abstract

The invention discloses a method for compensating direct current brushless motor torque and a system thereof. The invention is mainly applied to a control system of the direct current brushless motor with unsymmetrical load. When the direct current brushless motor is in rotation, the control signal of rotors at numerous absolute positions is adjusted according to the difference between an averagecurrent which runs through a protective resistance and a momentary current, thereby guaranteeing that the corresponding momentary current at absolute position is close to the average current.

Description

Technical field [0001] The invention relates to a torque compensation method and system for a DC brushless motor, in particular to a torque compensation method and system for a DC brushless motor with asymmetric load. Background technique [0002] As we all know, DC Brushless Motor (DC Brushless Motor) has the characteristic that the curve of speed and torque is approximately linear. Therefore, DC Brushless Motor can be widely used in various products. Simply put, since the DC brushless motor is a combination of a wound stator (Wound Stator) and a permanent magnet rotor (Permanent Magnet Rotor), there must be a position detection circuit to detect the rotation position of the rotor . The position signal generated by the position detection circuit can be provided to the control unit to generate appropriate control signals, and the control signals have a fixed sequence, so that the switching circuit (Switching Circuit) sequentially provides input current (InputCurrent) to the stato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/00H02P6/16H02P6/10
Inventor 黄志明
Owner SUNPLUS TECH CO LTD