Device and method for online identification of static parameters of permanent-magnet synchronous motor
A permanent magnet synchronous motor and parameter identification technology, which is applied to control electromechanical transmission, control generator, motor generator control, etc.
Active Publication Date: 2013-12-04
浙江布科伺服科技有限公司
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Due to the non-linearity of the magnetic characteristics of the motor core, the motor parameters measured by this method when the motor is not applied with operating current cannot reflect the real situation of the motor when it is running. Therefore, this method has its limitations
[0003] Moreover, the parameters of the permanent magnet synchronous motor change with the environmental conditions, the operation of the motor, and the heat generation. Therefore, the motor parameters in the vector control calculation must be corrected at any time, otherwise it is difficult to achieve the ideal control effect.
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[0023] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments. However, those skilled in the art should recognize that the following implementations are only exemplary, and are intended to better enable those skilled in the art to understand the patent, and should not be construed as limiting the scope of the patent; as long as Any equivalent changes or modifications based on the spirit disclosed in this patent and similar structures, methods and similar changes thereof all fall within the scope of this patent.
[0024] see figure 1 , figure 1 It is a schematic block diagram of the permanent magnet synchronous motor servo system based on current decoupling control in the d-q coordinate system, including rectified power supply and bus voltage measurement 1, q-axis current controller 2, d-axis current controller 3, and inverse Park transformation unit 4 , decoupling cont...
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The invention relates to a device and a method for online identification of static parameters of a permanent-magnet synchronous motor. The method includes that a staircase voltage generator, a pulse voltage generator and a parameter identification unit are added in a conventional servo control system; in the suspended interval before or in running of the motor, the parameter identification unit controls the staircase voltage generator to generate direct-axis staircase voltage signals with multiple steps or controls the pulse voltage generator to generate multiple groups of quadrature-axis pulse voltage signals with different altitudes, the signals are then input to the permanent-magnet synchronous motor after being converted, and direct-axis current or quadrature-axis current of the motor is collected into the parameter identification unit; and meanwhile, test signals sent from the staircase voltage generator and the pulse voltage generator are also collected into the parameter identification unit, so that values of real-time stator winding resistance, direct-axis inductance and quadrature-axis inductance of the motor are identified on the premise of no rotation of a rotation shaft of the motor. The device and the method are based on clear principle; the device has simple structure, high speed and high efficiency; the method is easy to implement.
Description
technical field [0001] The invention relates to the technical field of vector control of permanent magnet synchronous motors, and also relates to a technology for online determination of static parameters of permanent magnet synchronous motors, in particular to a device and method for online identification of static parameters of permanent magnet synchronous motors. Background technique [0002] The core of the permanent magnet synchronous motor servo system is the fast and dynamic control of the electromagnetic torque of the permanent magnet synchronous motor, and this can only be truly realized after the emergence of vector control technology. Because the vector control method is based on the accurate parameters of the controlled permanent magnet synchronous motor, the measurement of the parameters of the permanent magnet synchronous motor is the first step to realize the vector control. For example, comparative document 1, the Chinese invention patent CN200710195304.8 "St...
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IPC IPC(8): H02P21/14
Inventor 孔繁金李庆松吴茂刚韦寿德
Owner 浙江布科伺服科技有限公司