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A control method of switched reluctance drive system for pumping unit

A switched reluctance drive and control method technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of increased cost, complex and changeable operating conditions of pumping units, and inability to detect switching points, etc., to ensure Stability, the effect of improving the energy saving effect

Inactive Publication Date: 2017-08-22
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] Due to the complex and changeable operating conditions of the pumping unit, the switching point of the load torque property in one stroke varies with the quality of the balance weight and the well conditions. The external sensor method commonly used in engineering not only increases the cost, but also cannot To detect these switching points, it is necessary to invent an automatic identification method for the load characteristics of the pumping unit and a control method for the switched reluctance motor that matches the load characteristics

Method used

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  • A control method of switched reluctance drive system for pumping unit
  • A control method of switched reluctance drive system for pumping unit
  • A control method of switched reluctance drive system for pumping unit

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Embodiment Construction

[0034] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and technical solutions.

[0035] The specific embodiment of the present invention is as figure 1 As shown, the microcontroller 1 is a 16-bit single-chip microcomputer DSPIC33FJ128MC706, the three-phase rectification and filtering circuit and its bus voltage detection circuit 2 detect the DC bus voltage U of the power converter 3 dc, and input it to the ADC0 port of microcontroller 1. The switched reluctance motor 4 is a three-phase switched reluctance motor with 12 / 8 poles, the rated power is 11kW, and the rated speed is 750r / min. It is powered by the power converter 3 and its three-phase winding is detected by the current detection circuit 5 The current is input to the ADC1 port, ADC2 port and ADC3 port of microcontroller 1 respectively. The three detection elements E1 , E2 , E3 in the position sensor 6 are separated by 7.5° in ...

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Abstract

The invention discloses a control method of a switched reluctance driving system for a pumping unit, belongs to the field of electric engineering, and relates to a stable, efficient and energy-saving control method of a switched reluctance motor drive system for the pumping unit, in particular to an automatic identification method for a load characteristic of the pumping unit and a load characteristic-based adaptive control method for a switched reluctance motor. A load torque switching point detection method is characterized in that any sensor or circuit is not added while the pulse number of a built-in position sensor of the switched reluctance motor is detected; meanwhile, a three-phase current detected by a current detection circuit is sampled; and counting and judging are carried out through a microcontroller. A control system finishes quantification of a torque switching point position in a stroke of the pumping unit through a self-learning mode, automatically enters a load self-adaptive control state, and changes PI parameters of a rotating speed regulator and a current regulator according to the load characteristic of the pumping unit, so that an output torque of the switched reluctance motor is matched with the load torque of the pumping unit.

Description

technical field [0001] The invention belongs to the field of electrical engineering, and relates to a stable, efficient and energy-saving control method for a switched reluctance motor drive system for a pumping unit, in particular to an automatic identification method for the load characteristics of a pumping unit and a switched reluctance based on the load characteristics Adaptive control methods for motors. Background technique [0002] Switched reluctance motors are more and more applied to pumping units because of their advantages such as simple structure, high power factor, small starting current, large starting torque, wide speed range, high operating efficiency and frequent start and stop. driving, but because the load of the pumping unit fluctuates periodically, the crank rotates once, and the load of the pumping unit has both a braking area and a dragging area; and the existing switched reluctance motor transmission system is based on the speed For the purpose of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P25/08H02P23/00
Inventor 孙建忠温洪彬白凤仙王娇龙钟启濠王晨
Owner DALIAN UNIV OF TECH
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