Method and device for testing AC-direct-axis inductance of brushless DC motor
A brushless DC motor and AC-DC-axis inductance technology, which is applied in the testing field of AC-DC-axis inductance, can solve the problems of bad influence of current response test results, inability to guarantee the control accuracy of brushless DC motor speed regulation, etc. The test method is convenient and the structure is simple
Active Publication Date: 2019-02-22
GUANGDONG WELLING ELECTRIC MACHINE MFG
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Problems solved by technology
[0003] For the test of the AC-D axis inductance of the brushless DC motor, the first is to use the LCR (ie inductance-capacitance-resistance) meter to directly test, but it can only measure the inductance of the motor stator in the unsaturated state, and the test results cannot be guaranteed. The control accuracy of the brushless DC motor speed regulation in the full speed range; the second is to calculate the inductance through the response of the stator current for a given step voltage of the motor stator. This method has a high dynamic response to the power supply with a given step voltage. Once the output voltage of the voltage source has a significant delay, it will have a great adverse effect on the current response test results
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[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0035] The method and device for testing the AC-D axis inductance of the brushless DC motor according to the embodiment of the present invention will be described below with reference to the accompanying drawings.
[0036] figure 1 It is a flow chart of a method for testing the AC-D axis inductance of a brushless DC motor according to an embodiment of the present invention. Such as figure 1 As shown, the test method includes the following steps:
[0037] S1, receiving a test instruction.
[0038] Optionally, the test instruct...
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The invention discloses a testing method and device for the quadrature-direct axis inductance of a brushless direct current motor. The testing method includes receiving the testing instructions; entering a direct axis inductance testing mode based on the testing instruction and performing the direct axis inductance testing, wherein the initial state of the direct axis inductance testing mode is that the direct axis positioning voltage is greater than zero, the quadrature-axis voltage is equal to zero, and the rotor position angle is equal to zero degree; and entering a quadrature-axis inductance testing mode based on the testing instruction and performing the quadrature-axis inductance testing, wherein the initial state of the quadrature-axis inductance testing mode is that the direct-axis positioning voltage is greater than zero, the quadrature-axis voltage is equal to zero, and the rotor position angle is equal to 90 degrees. The testing method for the quadrature-direct axis inductance of the brushless direct current motor is conveinet to test, and the device is simple in structure and high in testing precision.
Description
technical field [0001] The invention relates to the technical field of motors, in particular to a method and device for testing the AC-D axis inductance of a brushless DC motor. Background technique [0002] BLDCM (Brushless DC Motor, brushless DC motor) has many advantages such as simple structure, high power density, and low operating loss, making it widely used in aerospace, national defense, and household appliances. With the deepening of the research on the brushless DC motor speed control system, all the analysis must be based on the motor parameters, so the accurate calculation of the motor parameters is becoming more and more important. [0003] For the test of the AC-D axis inductance of the brushless DC motor, one is to use the LCR (that is, the inductance-capacitance-resistance) meter to directly test, but it can only measure the inductance of the motor stator when it is not saturated, and the test results cannot be guaranteed. The control accuracy of brushless D...
Claims
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IPC IPC(8): G01R27/26G01R31/34
CPCG01R27/2611G01R31/346
Inventor 付彦超李忠慧曾维光刘贤
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG