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Applicable to method for detecting fault of three-phase alternator, device for detecting fault

一种三相交流、检测装置的技术，应用在电动发电机测试、测量装置、测量电等方向，能够解决认证成本高、成本高等问题

Active Publication Date: 2017-09-29
SAGEM DEFENSE SECURITE SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Applicable to method for detecting fault of three-phase alternator, device for detecting fault
  • Applicable to method for detecting fault of three-phase alternator, device for detecting fault
  • Applicable to method for detecting fault of three-phase alternator, device for detecting fault

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Embodiment Construction

[0036] refer to figure 1 , the power supply circuit 2 includes a three-phase alternator 4 , an uncontrolled three-phase rectifier bridge 6 connected to the three-phase alternator 4 , and a load 8 electrically connected to the three-phase rectifier bridge 6 .

[0037] Alternator 4 includes a rotor and a stator having a first phase 12 , a second phase 14 and a third phase 16 .

[0038] The three-phase rectifier bridge 6 is implemented in a conventional manner using three pairs of diodes 10 . Each pair of diodes 10 is connected in parallel. Two diodes of the same pair are connected in series in the same direction. A first phase 12, a second phase 14 and a third phase 16 of the alternator are connected to the midpoint of each pair of diodes 10, respectively.

[0039] The load 8 is constituted by any load capable of being powered by the three-phase alternator 4, such as, but not limited to, a control unit of an engine installed on an aircraft, for example. The return line 20 fr...

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Abstract

The invention relates to a fault detection method of a three-phase AC generator connected with a three-phase rectifier bridge. The method includes the steps of: rectifying (70) the voltage produced by the three-phase alternator; adding (76) the rectified voltages produced in the first phase and the second phase to obtain a sum of the voltages; Subtract (78) twice the rectified voltage generated in the third phase from the sum of said voltages to obtain a voltage difference; compare (80) this voltage difference with the high and low thresholds; when the voltage difference is less than A fault is detected (82) when said low threshold or voltage difference is greater than said high threshold. The invention also relates to a fault detection device and a related computer program.

Description

technical field [0001] The invention relates to a fault detection method of a three-phase alternating current generator and a related fault detection device. Background technique [0002] In particular, the detection method is suitable for detecting an open circuit of a phase of an alternator and / or a short circuit of a phase to ground. [0003] For example, the method may be adapted to detect a failure of an alternator supplying an engine control unit, eg an aircraft engine. This control unit controls the operation of the engine according to altitude, external pressure, external temperature, flow rate of injected fuel, and the like. In this application, for passenger safety, it is important to detect alternator failure so that backup power mode can be quickly established. Of course, the method and apparatus for detecting faults are also applicable to any other application powered by a three-phase alternator. [0004] Fault detection is usually done by measuring the phase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34H02P29/024
CPCH02P29/0241G01R31/343G01R31/34
Inventor 乔尔·瓦诺利托尼·福尔蒙特
Owner SAGEM DEFENSE SECURITE SA
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