Simple vector control method for permanent magnet synchronous motor
A permanent magnet synchronous motor, vector control technology, applied in vector control system, motor generator control, AC motor control and other directions, can solve the problems of long conversion time, large amount of software code, cumbersome process, etc., to reduce the amount of code, The effect of simplifying the process and reducing the conversion time
Inactive Publication Date: 2017-03-08
杭州都凌汽车研发有限公司
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[0056] In order to overcome the disadvantages of the existing vector control method for permanent magnet synchronous motors, such as cumbersome flow, excessive software code, and long conversion time, the present invention provides a permanent magnet synchronous motor that simplifies the cumbersome process, reduces the code amount, and shortens the conversion time. A Simple Vector Control Method for Synchronous Motor
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[0086] The present invention will be further described below in conjunction with the accompanying drawings.
[0087] refer to Figure 6 to Figure 12 , a simple vector control method of permanent magnet synchronous motor, the difference from the traditional vector control algorithm is that the simple vector control algorithm does not need to perform action time calculation, sector calculation and time saturation judgment, simplifying the tedious process, including The following steps:
[0088] Step 1, according to the control amount U d and U q Get U by inverse Park transform α and U β , the formula is as follows:
[0089] Uα=U d cosθ-U q sinθ;
[0090] Uβ=U q cosθ+U d sinθ;
[0091] In the formula, U d and U q is the voltage component on the d and q axes, U α and U β Represents the components on the α axis and the β axis in the static coordinate system, and θ is the spatial position angle;
[0092] Step 2, according to the obtained static U α and U β The valu...
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Disclosed is a simple vector control method for a permanent magnet synchronous motor. The simple vector control method comprises the following steps of 1, performing Park inverse transformation according to controlled variables of Ud and Uq to obtain U<alpha> and U<beta>; 2, performing calculation on projection scalars Ua, Ub and Uc on a three-phase coordinate according to the obtained static U<alpha> and U<beta>; and 3, calculating three-phase duty ratio according to the obtained Ua, Ub and Uc values, and working out the three-phase duty ratio according to the changing conditions of the projection scalar formulas of Ua, Ub and Uc on the three-phase coordinate. By adoption of the simple vector control method for the permanent magnet synchronous motor provided by the invention, the troublesome process can be simplified, code amount can be reduced, and the conversion time can be shortened.
Description
technical field [0001] The invention belongs to the field of motor control, in particular to a vector control method of a permanent magnet synchronous motor. Background technique [0002] At present, space voltage vector control is the most commonly used method for permanent magnet synchronous motor control, and it has been widely promoted. [0003] figure 1 The schematic diagram of the three-phase PWM inverter supplying power to the permanent magnet synchronous motor is drawn. In order to make the motor work symmetrically, three-phase power must be supplied at the same time. a, b, and c represent the switching states of the three bridge walls respectively, and it is stipulated that the conduction of the upper bridge wall device is represented by "1", and the conduction of the lower bridge wall device is represented by "0", and they are arranged in sequence according to the UVW phase sequence. It can be deduced that the phase voltage vector [U u , U v , U w ] T with th...
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IPC IPC(8): H02P21/24H02P27/08H02P25/024
CPCH02P25/024H02P27/08
Inventor 陈林刘慧军潘世林郭永斌许扬
Owner 杭州都凌汽车研发有限公司