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Dragging device with high starting performance induction motor and frequency transformer cooperatively running

A technology of induction motor and starting performance, which is applied in the direction of AC motor control, starter parts, electrical components, etc., can solve the high problems of motors and frequency converters, achieve high safety factor operation, ensure optimal efficiency, and have obvious energy-saving effects Effect

Inactive Publication Date: 2009-03-11
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to improve the problem that the capacity of the motor and the frequency converter in the traditional frequency conversion drive device is obviously higher than the actual load, thereby providing a drive device with high starting performance matching the load capacity and the joint operation of the motor and the frequency converter

Method used

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  • Dragging device with high starting performance induction motor and frequency transformer cooperatively running
  • Dragging device with high starting performance induction motor and frequency transformer cooperatively running
  • Dragging device with high starting performance induction motor and frequency transformer cooperatively running

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Experimental program
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specific Embodiment approach 1

[0010] Specific implementation mode one: refer to figure 1 Describe this specific embodiment, the driving device for the joint operation of the induction motor with high starting performance and the frequency converter, which includes: the first AC contactor KM1, the fourth AC contactor KM4, the frequency conversion system 3, the three-phase motor 4, the first current Sensor 5, the second current sensor 6, the third current sensor 7 and the main controller 1, the A-phase static terminal of the first AC contactor KM1, the B-phase static terminal of the first AC contactor KM1 and the first AC contactor KM1 The C-phase static terminal of the frequency conversion system 3 is respectively connected to the A-phase power input terminal A1, the B-phase power input terminal B1 and the C-phase power input terminal C1 of the frequency conversion system 3, and the A-phase power output terminal A3 and the B-phase power output terminal of the frequency conversion system 3 The terminal B3 an...

specific Embodiment approach 2

[0013] Specific implementation mode two: refer to figure 2 Describe this specific embodiment, the difference between this embodiment and specific embodiment 1 is that it also includes the second AC contactor KM2 and the fifth AC contactor KM5, and the windings of its three-phase motor 4 include: motor winding L1, motor winding L2, motor winding L3, motor winding L4, motor winding L5 and motor winding L6, the ends of the motor winding L1, motor winding L2 and motor winding L3 are respectively connected to the head ends of the motor winding L4, motor winding L5 and motor winding L6 , the A-phase static end of the second AC contactor KM2, the B-phase static end of the second AC contactor KM2, and the C-phase static end of the second AC contactor KM2 are respectively connected to the first end of the motor winding L1 and the motor winding L2 The first end of the first AC contactor KM2 is connected to the first end of the motor winding L3, and the A-phase moving end of the second ...

specific Embodiment approach 3

[0015]Specific embodiment three: the difference between this embodiment and specific embodiment two is that it also includes: a motor integrated protector 2 and an air circuit breaker S1, and the three-phase power supply is connected to the A-phase static end and the air circuit breaker of the air circuit breaker S1 respectively. The B-phase static end of the switch S1 is connected to the C-phase static end of the air-break switch S1, the A-phase moving end of the air-breaking switch S1, the B-phase moving end of the air-breaking switch S1, and the C-phase moving end of the air-breaking switch S1 Respectively connected to the A-phase current input end of the integrated motor protector 2, the B-phase current input end of the integrated motor protector 2 and the C-phase current input end of the integrated motor protector 2, the A-phase current input end of the integrated motor protector 2 The output terminal, the B-phase current output terminal and the C-phase current output term...

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Abstract

The invention provides a drive apparatus for the combined running of an induction motor with high starting performance and a frequency converter, relating to the field of motor drive. The invention solves the problems that the traditional frequency conversion drive apparatus capacity is obviously higher than the actual load. A three-phase power supply of the apparatus is connected with three static ends of a first AC contactor KM1 and a three-phase power supply input end of a frequency conversion system, three power output ends of the frequency conversion system are connected with three follower ends of the first AC contactor KM1 by a fourth AC contactor KM4, the three follower ends of the first AC contactor KM1 are respectively connected with a three-phase winding of a three-phase motor, a main controller detects three-phase current, a control signal output end of the main controller is connected with a control signal input end of the frequency conversion system, and two control signal output ends of the main controller are respectively connected with coils of two AC contactors. The invention is widely used in various drive occasions, especially in the over loading starting operating condition by means of good energy saving effect.

Description

technical field [0001] The invention relates to a motor driving device. Background technique [0002] In industrial and agricultural production, there are various occasions where the drive device needs high starting performance. The selection of the motor in the drive device working in these occasions is mainly based on the load start. Due to the large starting current of the conventional induction motor, the start The torque is not high, causing the power of the selected motor to be greater than that required for normal operation, especially for heavy-load starting applications such as oil field pumping units. The power required for normal operation is only 50% of the power required for load starting, or even more. Low, this selection method causes a huge waste of equipment costs; at the same time, the motor is "big horse-drawn cart", and the work efficiency is low, resulting in a waste of electric energy. [0003] At present, the frequency conversion drive devices put int...

Claims

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Application Information

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IPC IPC(8): H02P27/04H02P1/04H02P23/02
Inventor 曹君慈霍菲阳高晗璎李伟力张晓晨沈稼丰
Owner HARBIN UNIV OF SCI & TECH
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