A method and system for controlling power generation of an asynchronous motor
A technology for asynchronous motor and power generation control, which is applied in the control system, control of generators, and control of generators through magnetic field changes. It can solve the problems that the electromagnetic speed sensor is susceptible to interference and the estimation accuracy is not high, so as to reduce the speed interference and stabilize the output. Effect
Active Publication Date: 2020-07-10
BEIJING MECHANICAL EQUIP INST
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[0004] In view of the above analysis, the present invention aims to provide an asynchronous motor power generation control method and system, which solves the problem that the electromagnetic speed sensor is susceptible to interference in the power generation mode of the asynchronous motor, and the estimated speed obtained by the speed sensorless technology has the speed estimation accuracy when the load changes suddenly. The problem is not high, so as to improve the stability of the asynchronous motor generation control system
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[0025] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.
[0026] figure 1 It is a flowchart of a method for controlling power generation of an asynchronous motor according to an embodiment of the present invention.
[0027] A specific embodiment of the present invention discloses a method for controlling power generation of an asynchronous motor, such as figure 1 shown, including the following steps:
[0028] S101, collect the detection speed of the rotation of the asynchronous motor, start the power generation control algorithm to generate the DC bus voltage, and simultaneously sample the three-phase current of the asynchronous motor and the DC bu...
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The present invention relates to an asynchronous motor generation control method and system, belonging to the field of motor generation control. The method comprises the steps of: collecting a detection rotation speed n<chuan> of rotation of an asynchronous motor to start a generation control algorithm to generate a direct current bus voltage, and collecting a three-phase current of the asynchronous motor and the direct current bus voltage; according to the detection rotation speed, the three-phase current and the direct current bus voltage, employing the output of a speed sensorless to control the generation control algorithm; and according to the output of the generation control algorithm, controlling the asynchronous motor to generate the direct current bus voltage. The problems are solved that the electromagnetic speed sensor is susceptible to interference in the generation mode of the asynchronous motor and the estimation precision of the rotation speed is not high to influence the stable generation control when the load is suddenly changed obtained by the speed sensorless technology.
Description
technical field [0001] The invention relates to the field of motor power generation control, in particular to an asynchronous motor power generation control method and system. Background technique [0002] The existing asynchronous generator control system uses the prime mover to drive the asynchronous motor to rotate, and the controller collects the rotational speed npass of the motor rotor and the DC bus voltage Udc. The speed n of the asynchronous motor is obtained through the speed sensor, that is, after the toothed plate sweeps the electromagnetic sensor to detect the end face, the rotational speed of the toothed plate is obtained to obtain the rotational speed of the asynchronous generator rotor. The control algorithm of the asynchronous generator is realized by programming the digital controller, and finally the conversion of mechanical energy to electrical energy of the asynchronous motor is realized. Electric energy is stored in the bus capacitor C in the form of d...
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IPC IPC(8): H02P9/10H02P9/36
CPCH02P9/105H02P9/107H02P9/36
Inventor 赵文杰吴元元户恒在秦东东梁晓龙李婧
Owner BEIJING MECHANICAL EQUIP INST