Direct current power ergometer and its control system

A technology of electric dynamometer and DC motor, which is applied in the direction of power metering, measuring devices, instruments, etc., and can solve the problems of more fatal impact on measurement accuracy, waste, and impact on measurement accuracy, etc.

Inactive Publication Date: 2005-03-02
HAIYANG SCI & TECH SHIYAN CITY
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AI Technical Summary

Problems solved by technology

[0002] The power measurement equipment used in the traditional power transmission test system is mainly the hydraulic dynamometer and the eddy current dynamometer. Their disadvantage is that the mechanical energy absorbed by the dynamometer is finally converted into heat energy and taken away by the circulating cooling water. The input torque is measured indirectly by measuring the counter torque of the floating casing, and the measurement accuracy will be affected by the friction force of the floating casing bearing and the swing angle of the arm, especially when the floating casing bearing is loaded non-uniformly for a long time After fatigue occurs, the impact on measurement accuracy is more fatal

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  • Direct current power ergometer and its control system
  • Direct current power ergometer and its control system

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Embodiment Construction

[0005] according to Figure one As shown, the mechanical power transferred from the prime mover 1 through an intermediate device (such as a gearbox) 2 is measured by a bearingless torque sensor 3 and directly converted into a DC power by the dynamometer host 4 (DC motor or DC generator), and then The four-quadrant DC motor drive control cabinet 5 is converted into three-phase AC power matching the power supply parameters of the grid by active inverter mode, and then sent to the output side of the power distribution cabinet 7 after passing through the high-order harmonic isolation transformer 6. The invention also needs to connect the reactive power compensation cabinet at the output side of the power distribution cabinet 7 in parallel. The three-phase alternating current power is sent to the power distribution cabinet 7 through the isolation transformer 6 to eliminate high-order harmonics. Such electric power can be fed back to the power grid or sent to the prime mover for reuse, ...

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Abstract

The invention discloses a direct current electric dynamometer and its control system for changing mechanical energy absorbed by dynamometer into direct electric power which then being changed into indirect electric power through active inversion to feedback to electric network, besides, there is no problem of inaccurate measurement of torsion moment caused by heterogeneous bearing of floating shell axis. Its properties are that torsion moment put out from electric machine is measure directly by nonbearing torsion moment sensor on output axis of dynamometer, after mechanical energy of prime mover changed by dynamometer into direct electric power which is the changed into three-phase alternating current indirect electric power matching with direct electric power through four-quadrant direct current motor motion control tank. The invention can completely recovery power delivered in system and save energy, and measure torsion moment more directly and accurately.

Description

Technical field [0001] The invention relates to an electric power dynamometer and its control system, in particular to a direct current electric dynamometer and its control system. Background technique [0002] The power measurement equipment used in the traditional power transmission test system is mainly hydraulic dynamometer and eddy current dynamometer. Their shortcomings are: the mechanical energy absorbed by the dynamometer is finally converted into heat energy and the waste is taken away by the circulating cooling water. The input torque measurement is indirectly obtained by measuring the reaction torque of the floating casing. The measurement accuracy will be affected by the friction of the floating casing bearing and the swing angle of the arm, especially when the floating casing bearing is not uniformly loaded for a long time After fatigue, the impact on measurement accuracy is even more fatal. Summary of the invention [0003] The purpose of the DC power dynamometer a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/24
Inventor 李四海
Owner HAIYANG SCI & TECH SHIYAN CITY
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