Current sensor error rapid on-line self-correcting motor driving system and control method

A motor drive system, current sensor technology, applied in the direction of motor generator control, electronic commutation motor control, AC motor control, etc.

Active Publication Date: 2020-06-19
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Solving many problems existing in the current sampling error correction method of the motor drive system in China, the present invention not only has the advantage...

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  • Current sensor error rapid on-line self-correcting motor driving system and control method
  • Current sensor error rapid on-line self-correcting motor driving system and control method
  • Current sensor error rapid on-line self-correcting motor driving system and control method

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Embodiment Construction

[0096] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0097] A current sensor error fast online self-correcting motor drive system. In the three-phase motor drive control system, the inverter is powered by the DC bus voltage, and the three-phase windings of the motor are respectively connected to the output three-phase interface of the inverter. The motor A , B two-phase winding input cables are forwardly through the A, B two-phase current sensor signal acquisition ports, and the cables input to the positive end of the inverter are also forwardly through the A, B two-phase current sensor signal acquisition ports , using the topological relationship between the final acquisition signal of the A and B two-phase current sensors and the switching state of the inverter, determine the manifestation of the current sampling error in the system, and obtain the relationship between the current sampling value containi...

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Abstract

The invention provides a current sensor error rapid on-line self-correcting motor driving system and a control method. The inverter is powered by direct-current bus voltage; three-phase windings of amotor are connected with inverter output three-phase interfaces. Input cables of a A-phase winding and a B-phase winding of the motor forwardly pass through signal acquisition ports of a A-phase current sensor and a B-phase current sensor respectively; in addition, cables input into a positive end of the inverter also pass signal acquisition ports of the A-phase current sensor and the B-phase current sensor in the forward direction respectively. A topological relation between signals and the on-off state of the inverter is finally acquired by utilizing A-phase and B-phase current sensors; theestimation methods of the bias errors and the gain errors of the current sensors in different output voltage sectors are analyzed by using an association table, and the bias errors and the gain errorsof the current sensors are directly, quickly and accurately estimated by performing current sampling through the current sensors. The error estimation speed of the current sensors are high, the efficiency is high, the precision is high, the estimation applicability is high, and the error estimation calculation amount is small.

Description

technical field [0001] The invention relates to the field of motor drive control, in particular to a motor self-correcting drive system and a control method. Background technique [0002] Modern three-phase motor drive control technology has greatly improved the performance of the motor system. This performance improvement is largely dependent on each current sensor in the system. These high-precision current sensors are able to accurately collect and feedback the system current, and the closed-loop control of the system It can be realized to ensure the high-performance operation of the system. However, due to system aging, or harsh operating conditions, such as extreme temperatures, the accuracy of each current sensor in the system will inevitably be affected, resulting in offset errors and gain errors in the feedback signal, and ultimately affecting the overall performance of the system (such as Quoc NamTrinh, Peng Wang, Yi Tang, Leong Hai Koh, Fook Hoong Choo, "Compensat...

Claims

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Application Information

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IPC IPC(8): H02P21/22H02P27/12
CPCH02P21/22H02P27/12
Inventor 鲁家栋胡义华王洁倪锴
Owner NORTHWESTERN POLYTECHNICAL UNIV
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