Brushless double-feed motor-based variable frequency speed regulation system
A technology of variable frequency speed regulation and double-fed motor, which is applied to the starter of a single multi-phase induction motor, AC motor control, motor generator/starter, etc., and can solve the problem of ensuring the speed regulation range of brushless double-fed motor Difficulty in starting the doubly-fed motor, reducing the capacity of the frequency converter, etc., to achieve the effect of speed regulation, energy-saving operation, capacity saving, and impact reduction
Inactive Publication Date: 2016-03-23
WUXI SILENT ELECTRIC SYST SES TECH CO LTD +1
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Problems solved by technology
[0004] The invention provides a frequency conversion speed regulation system based on a brushless doubly-fed motor, which solves the difficulty in starting the brushless doubly-fed motor and the difficulty of not only ensuring the speed regulation range of the brushless doubly-fed motor, but also ensuring a reasonable reduction of the frequency converter. technical problems with capacity
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[0014] The present invention will be further described below in conjunction with the accompanying drawings.
[0015] A variable frequency speed regulation system based on a brushless doubly-fed motor, including a power grid 7, a brushless doubly-fed motor 1 and a frequency converter 4, the power grid 7 is directly connected to the power winding 2 of the brushless doubly-fed motor 1, and a double-throw switch The moving end of 5 is connected with the control winding 3 of the brushless doubly-fed motor 1, the first fixed end of the double-throw switch 5 is connected to the power grid 7 through the frequency converter 4, and the three resistors are connected in a star-shaped connection to form Two sets of start-up resistors 6, the outlet terminals of the three star-connected resistors are respectively connected to the taps of the three-phase winding of the control winding 3 through the second fixed end of the double-throw switch 5.
[0016] Each resistor 9 of the three resistors ...
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The invention discloses a brushless double-feed motor-based variable frequency speed regulation system, and aims at solving the problem that a brushless double-feed motor is difficult to start, and the speed regulation range of the brushless double-feed motor cannot be easily ensured. The brushless double-feed motor-based variable frequency speed regulation system comprises a power grid (7), the brushless double-feed motor (1) and a converter (4), wherein the power grid (7) is directly connected with a power winding (2) of the brushless double-feed motor (1); a running end of a double-throw switch (5) is connected with a control winding (3) of the brushless double-feed motor (1); a first fixed end of the double-throw switch (5) is connected with the power grid (7) through the converter (4); three resistors are connected into a star connection way and form two groups of starting resistors (6); and leading-out terminals of the three resistors which are in star connection are connected with a tap of a three-phase winding of the control winding (3) through a second fixed end of the double-throw switch (5) respectively. The capacity of the converter is reduced; and the cost of the overall system is reduced.
Description
technical field [0001] The invention relates to a frequency conversion speed regulation system, in particular to a frequency conversion speed regulation system based on a brushless double-fed motor. Background technique [0002] At present, in the field of high-power fans and water pumps, the traditional method is to directly connect the motor to the power grid, but the disadvantage is that the motor basically runs at a fixed speed, and the loss is relatively large when the load requirement is low, so At present, in consideration of energy saving, more and more high-power fans and water pumps have begun to use frequency conversion speed control systems. [0003] In a variety of frequency conversion speed control systems, the motor speed control systems used mainly include cage rotor asynchronous motors, wound asynchronous motors and permanent magnet motors. The frequency conversion speed control systems composed of these three motors have their own advantages and disadvantag...
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IPC IPC(8): H02P27/04H02P25/18H02P25/22H02P1/32
Inventor 邵诗逸乌云翔周思宇任发张云浩
Owner WUXI SILENT ELECTRIC SYST SES TECH CO LTD