Control method for electric excitation double-salient-pole motor without position sensor

A technology of electric excitation doubly salient and doubly salient motors, which is applied in the direction of electronic commutation motor control, control system, electrical components, etc., to achieve the effect of strong system structure, reliable operation and low cost

Active Publication Date: 2009-04-15
NANJING HUASHI ELECTRONICS SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no effective method for position sensorless control of doubly salient motors at home and abroad

Method used

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  • Control method for electric excitation double-salient-pole motor without position sensor
  • Control method for electric excitation double-salient-pole motor without position sensor
  • Control method for electric excitation double-salient-pole motor without position sensor

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Experimental program
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Embodiment Construction

[0019] Such as figure 1 shown. The control method of the position sensorless electric excitation doubly salient pole motor of the present invention uses a power supply to provide current to the three-phase windings of the doubly salient pole motor, namely the A-phase winding, the B-phase winding and the C-phase winding through the inverter, including the following step:

[0020] a.) Initial positioning: The switch signal output by the main controller is used to pass through the inverter to any two-phase winding of the doubly salient motor to pass the switching current to make the rotor of the doubly salient motor rotate by a corresponding angle. In the winding: a positive current is passed into one phase winding, and a negative current is passed into the other phase winding;

[0021] b.) Accelerated start: output the offline commutation logic signal through the main controller through the given offline commutation pulse signal, and pass the offline commutation logic signal t...

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Abstract

The invention discloses a control method used for a no-position sensor electrical excitation dual salient pole motor, belonging to the field of special motor. The method adopts a three-stage starting method as follows: a positioning stage, an offline accelerating stage and a no-position running stage; wherein, in the positioning stage, currents are electrified in any two phases of the electric excitation dual salient poles, with positive current at one phase and negative current at the other phase, thus positioning the rotor to a certain positioning angle; in the offline accelerating stage, according to the commutation conduction logic, the commutation signal is given offline, with the frequencies arranged from low to high so as to lead the motor to be started in an accelerative way; in the no-position running stage, after short offline acceleration process, the judgment to the commutation point can be achieved by detecting the middle point voltage fluctuation. The control method has the advantages of leading the motor system structure to be firmer, to run reliably and highly effectively and to have low cost, and achieves the running of the electric excitation dual salient pole motor no-position sensor.

Description

technical field [0001] The invention relates to a control method of a special motor, in particular to a control method of a non-position sensor electric excitation double salient pole motor. Background technique [0002] For the electrically excited doubly salient motor drive system, real-time and accurate rotor position information is a necessary prerequisite for its reliable operation. Obtaining position information by using a shaft position sensor or other types of detecting position detectors will increase the size of the motor, increase the cost and complexity of the system, and affect the reliable operation of the entire system. Therefore, how to remove the position detector and directly use the motor information to determine the rotor position indirectly, so as to improve the reliability of the system operation and reduce the system cost, is undoubtedly a very potential research direction, which has important value in the fields of aerospace and wind power generation....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/18H02P6/185
Inventor 张永帅周波张乐魏佳丹胡朝燕
Owner NANJING HUASHI ELECTRONICS SCI
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