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Device and method for processing peak voltage of winch frequency conversion speed adjusting device

A technology of variable frequency speed regulation and peak voltage, applied in the direction of electrical components, AC motor control, irreversible AC power input conversion to DC power output, etc., can solve problems such as coil voltage impact and motor failure, and reduce overshoot voltage , prolong life, reduce the effect of change rate

Inactive Publication Date: 2014-02-26
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Excessive peak voltage is added to the coil of the motor stator, causing a voltage impact on the coil, and frequent peak voltage impacts will cause the motor to fail prematurely

Method used

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  • Device and method for processing peak voltage of winch frequency conversion speed adjusting device

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Experimental program
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Embodiment Construction

[0015] Below in conjunction with specific embodiment, further illustrate the present invention.

[0016] It can be seen from the figure that a device for controlling the peak voltage of the frequency conversion speed regulating device of the winch is characterized in that it includes a diode D 1 -D 12 , Resistive element R 1 -R 13 , capacitance C 1 -C 2 , Zener tube Z 1 -Z 10 .

[0017] The diode D 1 -D 4 respectively with resistor R 1 -R 4 Parallel, then series to form A phase, D 5 -D 8 respectively with resistor R 5 -R 8 Parallel, then series to form B phase, D 9 -D 12 respectively with resistor R 9 -R 12 They are connected in parallel and then connected in series to form phase C, thus forming a three-phase rectification.

[0018] R 1 , R 5 , R 9 connected together at the upper end and then with C 1 、C 2 One end connected in parallel, R 4 , R 8 , R 12 The lower ends are connected together and then with C 1 、C 2 The other end of the parallel conne...

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Abstract

The invention relates to a device and a method for processing peak voltage of a winch frequency conversion speed adjusting device. The device comprises diodes D1-D12, resistive elements R1-R13, capacitors C1-C2 and voltage-stabilizer tubes Z1-Z10. By reducing a change rate dv / dt of output voltage of a frequency converter, overshoot voltage at a motor end caused by an overlong driving cable is reduced, insulation of a motor is protected, bearing current is reduced, service life of the cable and the motor is prolonged, temperature of the motor is reduced, noise of the motor is reduced, electromagnetic interference is reduced, and system reliability is improved.

Description

technical field [0001] The invention relates to a method for controlling the peak voltage of a frequency conversion speed regulating device of a drawworks, which is suitable for an electric transmission system of a mine hoist using the frequency conversion speed regulation technology. Background technique [0002] At present, the electrical drive systems of mine hoists in underground mines in my country mainly include: for large mine hoists, DC drive systems are mainly used, and DC motor-DC generator systems and thyristor converter-DC motor systems are also used; these two systems There are inherent shortcomings of DC motors, such as low efficiency and large maintenance workload. For medium and small hoists, AC electric transmission systems are mostly used, such as AC wound motors, and motor rotors are used to switch resistors for speed regulation. Although the equipment of this electric transmission system is simple, it has step-by-step speed regulation. The performance is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08H02M7/10
Inventor 于月森吕凤新吕威戚文艳张椿伍小杰
Owner CHINA UNIV OF MINING & TECH
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