Zero-power over underexcitation test method for synchronous motor
A test method and technology of synchronous motors, applied in the direction of motor generator testing, etc., to achieve the effect of protecting the converter, convenient experimental operation, and stable operation
Inactive Publication Date: 2011-11-23
JIANGSU UONONE NEW ENERGY +1
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[0007] (2) Using the traditional generator method, for some special synchronous motors, it is necessary to design a separate matching asynchronous motor
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[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0029] The zero power factor overexcitation test can be carried out when the motor under test is running as a generator or motor. When running as a generator, the active power should be equal to zero; when running as a motor, the load on the shaft should be zero. During the test, under the condition of over-excitation and zero power factor, the excitation current is measured, and the deviation of its corresponding voltage and armature current value from the rated value is preferably no more than ±0.15 per unit. The stray loss of the motor can be calculated through the zero power factor over-excitation test combined with the no-load motor method test.
[0030] The zero-power over- and under-excitation test method of the synchronous motor of the present invention adopts an IGBT power electronic device converter, and realizes th...
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The invention discloses a zero-power over underexcitation test method for a synchronous motor. The over underexcitation test method comprises the following steps of: starting an exciting winding current control ring, a weak magnetic control ring, a motor speed control ring, an armature d-axis current control ring and an armature q-axis control ring. Torque is generated under the action of armature q-axis current and exciting winding current; the rotate speed of the motor rises to rated rotate speed and is stabilized at the rated rotate speed; and the armature current control ring is started, and the amplitude of armature current is increased by increasing the amplitude of armature d-axis current to regulate voltage at the motor end. In the test method, the conventional mode of controllingcurrent by voltage is changed into a mode of controlling the voltage by the current by the vector control of the synchronous motor and the angle identification of a synchronous motor rotor, so the test method is safe and reliable, and a converter can be protected effectively. The motor runs stably by the vector control. Tests are convenient to operate, and the requirement of the tests can be met easily.
Description
technical field [0001] The invention relates to a zero-power over- and under-excitation test technology for a synchronous motor, and more specifically relates to a zero-power over- and under-excitation test method for a synchronous motor. Background technique [0002] During the factory inspection process of the motor, it is necessary to provide the user with the performance parameters of the motor, so the over-excitation test and under-excitation test must be carried out on the motor to measure the stray loss of the motor, so as to obtain the performance of the motor. Existing test methods for over- and under-excitation are as follows: [0003] (1) The traditional test method generator method is to drag the synchronous generator to the rated speed, with an inductive load, adjust the excitation current, and realize the overexcitation test of the synchronous generator. [0004] (2) Use igbt and other power electronic device converters to realize the VF control of synchronous...
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Inventor 柴继涛周细文吴恒荣周金博章辉
Owner JIANGSU UONONE NEW ENERGY