A system and method for calibrating field phase zeros of an electric machine

A correction method and phase technology, which are used in the estimation/correction of motor parameters, electronic commutators, etc., can solve the problems of zero point positioning deviation, current imbalance, mass production and maintenance trouble, and achieve accurate zero point correction and alignment. The effect of avoiding current imbalance and easy operation

Inactive Publication Date: 2018-12-21
YONGZHOU GOLDEN ANT NEW ENERGY MASCH CO LTD
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Problems solved by technology

However, due to reasons such as the consistency of the external circuit, the current flowing to the V and W phases may be unbalanced, resulting in a deviation in zero point positioning
Not only the positioning accuracy cannot be guaranteed, but also it will affect the subsequent use of the motor
Bring troubles to mass production and maintenance

Method used

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  • A system and method for calibrating field phase zeros of an electric machine

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the specific embodiments and drawings.

[0032] Such as figure 1 As shown, the motor electric field phase zero point correction system includes a servo drive and an encoder, which is an absolute encoder. A U-phase current receiving control module and a V-phase current output control module are arranged inside the servo drive, both of which are used to control the current stable input or output of the permanent magnet AC servo motor Current loop PWM timing control module.

[0033] The U-phase current receiving control module of the servo drive is connected to the U-phase winding of the motor, and is used to control the U-phase DC output from the U-phase of the motor M;

[0034] The V-phase current output control module is connected with the V-phase winding of the motor, and is used to control the input of the V-phase direct current from the V-phase of the motor M;

[0035] The signal i...

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Abstract

A system and method for calibrating the zero point of electric motor field includes connecting U-phase current receiving control module of servo driver with U-phase winding of motor, connecting V-phase current output control module with V-phase winding of motor, and connecting signal input and output terminal group of servo driver with signal input and output terminal group of encoder. The V phaseand the U phase of the motor are connected in series to input and output DC current less than the rated current respectively, and the zero point correction of the phase is carried out by using the step distance calculation, thereby avoiding the unbalance of the current when the V phase and the W phase are connected in parallel in the prior art. The method has the advantages of simple operation, accurate zero point correction alignment and high correction efficiency.

Description

technical field [0001] The invention relates to a motor electric field phase zero point correction system of a permanent magnet AC servo motor and a method for using the system to correct the motor electric field phase zero point. Background technique [0002] Before the permanent magnet AC servo motor is used, the motor usually needs to perform zero point correction of the electric field phase to achieve the purpose of the orthogonality between the electromagnetic field and the permanent magnetic field, so that the motor output effect is the best. However, the difference in the zero point calibration method not only has a great impact on the accuracy of the calibration position, but also has a huge impact on the efficiency of mass production and the convenience of subsequent maintenance. [0003] At present, the zero point phase correction of the permanent magnet AC servo motor is usually to pass a DC current smaller than the rated current to the motor winding to locate the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/16H02P23/14
CPCH02P6/16H02P23/14
Inventor 潘致利
Owner YONGZHOU GOLDEN ANT NEW ENERGY MASCH CO LTD
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