Brushless double-fed motor start control device capable of achieving multi-mode operation and method
A multi-mode operation, doubly-fed motor technology, applied in the direction of single motor speed/torque control, can solve problems such as inability to ensure that brushless doubly-fed motors cannot work, and achieve the effect of improving reliability
Pending Publication Date: 2017-07-28
GUANGDONG SHANGSHUI ENERGY TECH
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Problems solved by technology
Once the high-voltage power supply is abnormal, the brushless doubly-fed motor cannot work
None of the existing control schemes can ensure that the motor can still run continuously when the power supply of the power winding is abnormal
Method used
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[0031] In order to make the object, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0032] refer to figure 1 , the present invention can realize multi-mode running brushless doubly-fed motor starting control device, including brushless doubly-fed motor 7, three-phase full-control grid-side converter 3, three-phase full-control motor-side converter 4, The first and second AC power sources 1 and 2 and the control switch K1 , the power winding control switch K2 and the system control unit 6 . Among them, the AC side of the three-phase full-control grid-side converter 3 is connected to the first AC power supply 1 in sequence, and the DC side of the three-phase full-control grid-side converter ...
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The invention provides a brushless double-fed motor start control device capable of achieving multi-mode operation. The device comprises a brushless double-fed motor, a three-phase full-control type power grid side current transformer, a three-phase full-control type motor side current transformer, a first alternating current power supply, a second alternating current power supply, a control switch, a power winding control switch and a system control unit. The three-phase full-control type power grid side current transformer, the three-phase full-control type motor side current transformer, the control switch and the power winding control switch are connected with the system control unit. The invention also provides a method of start control. According to the invention, the control device and the method are advantageous in that it is achieved that a brushless double-fed motor is capable of continuously operating when a power winding power supply is abnormal, so reliability of operation of the brushless double-fed motor is further improved.
Description
technical field [0001] The invention relates to the field of motor speed regulation systems, in particular to a start-up control device and method for a brushless double-fed motor capable of realizing multi-mode operation. Background technique [0002] Brushless double-fed motor is a new type of motor. The brushless double-fed motor realizes the brushless structure through the power winding, the control winding and the specially designed rotor. At present, there are only two working modes of super-synchronous and sub-synchronous for brushless doubly-fed motors. In these two working modes, the power winding must be connected to a stable and reliable high-voltage power supply. Once the high-voltage power supply is abnormal, the brushless doubly-fed motor cannot work. None of the existing control schemes can ensure that the motor can still run continuously when the power supply of the power winding is abnormal. Contents of the invention [0003] In view of the above-menti...
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Login to View More IPC IPC(8): H02P6/08
CPCH02P6/08
Inventor 杨华马小亮
Owner GUANGDONG SHANGSHUI ENERGY TECH