Method and apparatus for flexibly starting high voltage motor

A soft start and high voltage technology, which is applied in the direction of motor generator/starter, single multi-phase induction motor starter, continuously variable inductor/transformer, etc., can solve the problem of limited adjustment range and large harmonic pollution , large loss and other problems, to achieve the effect of long service life, good energy saving effect and strong overload capacity

Inactive Publication Date: 2008-10-01
谢有神
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the injection of DC, the noise is large, the adjustment range is limited, the harmonic pollution is large, and the loss is also large

Method used

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  • Method and apparatus for flexibly starting high voltage motor
  • Method and apparatus for flexibly starting high voltage motor
  • Method and apparatus for flexibly starting high voltage motor

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] Implementation Mode 1: see Figure 1-Figure 3 .

[0022] This embodiment includes a high-voltage motor running power switch 1, and also includes an inductor coil 2, an inductor core 3, a driving mechanism 4, a transmission mechanism 5, a fixed bracket 6, and a track 7. For each phase of the high-voltage motor running power supply, The input and output terminals of the operating power switch 1 are all connected in parallel with the inductor coil 2 (see figure 1 ). From figure 2 It can be seen that the driving mechanism 4 can adopt all driving mechanisms in the prior art, such as a motor driving mechanism (motor-belt pulley or motor-gear, etc.) or a pneumatic driving mechanism (such as a cylinder-propelling rod, etc.) or a hydraulic driving mechanism (such as Hydraulic cylinder—promoting rod etc.), transmission mechanism 5 then adapts with driving mechanism. In this embodiment, the drive mechanism 4 adopts a motor-gear structure, and the transmission mechanism 5 adop...

Embodiment approach 2

[0023] Implementation mode two: see Figure 4

[0024] In addition to the high-voltage motor running power switch 1, inductor coil 2, inductor core 3, drive mechanism 4, transmission mechanism 5, fixed bracket 6, and track 7 provided in Embodiment 1, this embodiment also has a coil frame 8 Each inductor coil 2 is installed on the coil frame 8, the screw nut 52 of the transmission mechanism 5 is arranged on the coil frame 8, the screw rod 51 is rotatably installed on the fixed bracket 6, and the inductor core 3 is also fixed on the fixed bracket 6, the motor 41 of the driving mechanism 4 drives the screw rod 51 to rotate through the gear 42, so that the screw nut moves on the screw rod, so that the inductor coil 2 moves, and the inductor core 3 is inserted or withdrawn.

[0025] When the device of the present invention works, the low-voltage control power supply of the driving mechanism 4 is first connected, so that the motor 41 drives the transmission mechanism 5 and the indu...

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Abstract

The present invention discloses a soft starting method of a high voltage motor and a device thereof. According to the invention, an inductor with adjustable magnetic resistance is provided at each phase of electric power source at two ends of the operation power switch of the high voltage motor. The adjustment to the magnetic resistance of the inductor is realized by the relative movement between the inductor coil and the magnetic core of the inductor. The method of the invention has the advantages of small and smooth starting current, no harmonic pollution, no injuring effect to the electric motor, low cost, energy saving and strong overload capacity. The method is mainly used for the soft starting and soft stopping of the high voltage motor.

Description

technical field [0001] The invention relates to the technical field of motor drive control. In particular, it relates to a soft starter for a high-voltage motor. It is mainly suitable for being connected in series in the stator winding circuit of a high-voltage motor for voltage-regulating soft-starting, especially for soft-starting and soft-stopping of high-power high-voltage motors above 500KW and 6-10KV. Background technique [0002] At present, there are many methods and devices for soft starting of high-voltage motors. Reactors are generally used as starting equipment for high-power high-voltage motors. Although the structure is simple, the reactance (impedance) value is fixed during the starting process and the starting characteristics are relatively hard. And it is easy to produce secondary impact, and it will also cause unsuccessful starting when the selection is not correct. In addition, there are those that use thyristors for voltage regulation, those that use li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/26H01F21/06
Inventor 谢有神
Owner 谢有神
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