Line breaking detection method for servo motor power line

A disconnection detection, servo motor technology, applied in the control of generators, motor generator control, control of electromechanical brakes, etc., can solve problems such as inability to determine the location of disconnection and difficulty in troubleshooting

Inactive Publication Date: 2014-12-24
SHENZHEN VMMORE CONTROL TECH
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Problems solved by technology

[0007] In addition, the method disclosed in this invention can only detect broken wires, but cannot judge the location of the

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  • Line breaking detection method for servo motor power line
  • Line breaking detection method for servo motor power line
  • Line breaking detection method for servo motor power line

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] see figure 1 , figure 1 It is a structural block diagram of the AC servo driver of the servo motor power line disconnection detection method of the servo driver in the present invention. In this embodiment, the servo motor power line disconnection detection method includes: providing an AC servo driver, and the AC servo driver includes Motor closed-loop control circuit, phase current command calculation unit and disconnection detection logic unit; the phase current command calculation unit calculates the three-phase current command, U-phase current and V The phase current is converted in...

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Abstract

The invention discloses a line breaking detection method for a servo motor power line. An alternating current servo driver is provided, the alternating current servo driver comprises a motor closed-loop control circuit, a phase current instruction calculating unit and a line breaking detection logical unit. The phase current instruction calculating unit feds a three-phase feedback current and a three-phase current instruction into the line breaking detection logical unit according to a torque current instruction in the motor closed-loop control circuit, a line breaking logical judgment strategy is configured in the line breaking detection logical unit, and line breaking judgment is conducted through the line breaking logical judgment strategy. By means of the line breaking detection method for the servo motor power line, phase currents can be judged directly, when large deviation exists between the torque current instruction and a practical torque current and the output target torque is smaller than a detection threshold value in a torque mode, more than two broken lines in the three-phase power line can also be accurately recognized, the comparative result of the phase current instruction and the feedback phase current in each period can be filtered, and thus false alarming cannot happen.

Description

technical field [0001] The invention relates to the technical field of electrical equipment detection, in particular to a method for detecting a disconnection of a servo motor power line. Background technique [0002] During the operation of the servo motor, due to vibration, aging, corrosion and other reasons, the power line may be disconnected. If the disconnection is not detected and processed, the motor will appear uncontrolled stalling, oscillation, free stop, etc. phenomenon, endangering the safety of equipment and personnel. [0003] Chinese Invention Patent Application Publication CN1778033A discloses a method for detecting disconnection of a servo motor power line. Figure 6 is its system structure diagram. In this figure, the difference between the torque current command Iq*100 and the actual torque current Iq110 is converted into a q-axis voltage command through PI calculation 103, and the difference between the excitation current command Id*102 and the actual ex...

Claims

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Application Information

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IPC IPC(8): H02P21/00
Inventor 陈阳
Owner SHENZHEN VMMORE CONTROL TECH
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