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Sensorless DTC control method and control system of synchronous reluctance motor

A technology of synchronous reluctance motor and control method, applied in control system, vector control system, motor generator control and other directions, can solve the problems of increasing the economic cost of system firmware, difficult sensor setting, etc. The effect of good dynamic performance and high steady-state operation efficiency

Pending Publication Date: 2018-01-16
WOLONG ELECTRIC GRP CO LTD
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Problems solved by technology

Therefore, it is necessary to install corresponding speed sensors, position pulse encoders or magnetic flux sensors, etc., but these sensors are difficult to install in most applications, which not only puts forward higher requirements for the installation structure, but also increases the complexity of the entire system firmware. economic cost

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  • Sensorless DTC control method and control system of synchronous reluctance motor
  • Sensorless DTC control method and control system of synchronous reluctance motor
  • Sensorless DTC control method and control system of synchronous reluctance motor

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Embodiment Construction

[0069] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0070] Such as Figure 1-3 Shown, a kind of synchronous reluctance motor sensorless DTC control method, it comprises the following steps:

[0071] 1) Power collection, detecting the two-phase current output by the synchronous reluctance motor driver and the system bus voltage, combined with the motor stator resistance parameters and the voltage reconstruction method, to obtain the voltage, current and back EMF in the static coordinate system on the stator side of the driver;

[0072] 2) Observing and estimating, performing flux linkage observation, torque observation and rotational speed observation and estimation according to the power data obtained in step 1), and feeding back the corresponding results to the control optimization step, DTC control step and speed loop PI control step;

[0073] 3) speed loop PI control, adjust and c...

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Abstract

The invention provides a sensorless DTC control method and control system of a synchronous reluctance motor, and relates to the field of motors. The speed control of the synchronous reluctance motor requires a speed sensor, a position pulse encoder or a magnetic flux transducer etc. to feedback information, the requirement of the installation structure is high, and the cost is high. The method includes following steps: 1) electric quantity acquisition; 2) observation estimation; 3) speed loop PI control; 4) direct-axis inductance identification; 5) control optimization; 6) DTC control; and 7)driving output: converting a control signal output by step 6) to an electric signal required by driving of the synchronous reluctance motor to realize the control of the synchronous reluctance motor.According to the technical scheme, the corresponding speed sensor or the position pulse encoder or the magnetic flux transducer does not needs to be installed, the installation is convenient, the structural requirement is reduced, the production cost is effectively reduced, the production efficiency is improved, stable and reliable operation of the synchronous reluctance motor can be effectively controlled, the starting torque is high, the dynamic performance is good, the steady-state operation efficiency is high, and the flux-weakening and speed-increasing capabilities are great.

Description

technical field [0001] The invention relates to the field of motors, in particular to a sensorless DTC control method of a synchronous reluctance motor. Background technique [0002] Synchronous reluctance motor, also known as reluctance synchronous motor, is essentially a synchronous motor, but its principle of generating electromagnetic torque is different from that of traditional synchronous motors. Its rotor is made of laminated sheets of highly magnetically permeable material with a specific shape. Due to the specific rotor laminations, the d-axis magnetic circuit is mainly closed by high magnetic permeability materials when passing through the rotor, and the q-axis magnetic circuit needs to cross the air gap multiple times when passing through the rotor. Therefore, the reluctance of the d-axis magnetic circuit of the synchronous reluctance motor is very small, while the reluctance in the q-axis direction is very large. This huge difference in reluctance makes the rot...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/14H02P21/13H02P21/30H02P25/08
Inventor 张卡飞廉晨龙姜泽鲁文其王岗冯芬魏君燕李长龙
Owner WOLONG ELECTRIC GRP CO LTD
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