A system and method for preventing demagnetization
An anti-retraction, permanent magnet motor technology, applied in the control system, electrical components, motor control and other directions, can solve the problems of magnetic steel demagnetization, motor failure, magnetic pole surface current density and penetration depth, etc., to reduce the temperature of the stator coil. , the effect of improving efficiency
Active Publication Date: 2020-09-25
ATLAS COPCO WUXI COMPRESSOR
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- Application Information
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Problems solved by technology
Due to the influence of the skin effect, the current density and penetration depth of the magnetic pole surface of the rotor are relatively large, and the heat loss is relatively high
In this case, the magnetic steel is easily demagnetized due to overheating, causing the motor to fail completely or fail to meet the expected performance requirements, greatly shortening the service life of the motor rotor
Method used
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[0027] In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0028] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.
[0029] Second, "one embodiment" or "an embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to ...
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The invention discloses a demagnetization-prevention system and method. The demagnetization-prevention system comprises a driving unit, an induction unit, a control unit and a speed adjustment unit, wherein the driving unit comprises a stator and a rotor, wherein the stator and the rotor generate current rotational speeds, a coil of the stator generates a stator coil temperature, the induction unit is used for detecting the stator coil temperature and the current rotational speeds and feeding back the stator coil temperature and the current rotational speeds to the control unit, the control unit is used for receiving the stator coil temperature fed back by the induction unit, giving out a signal after operation and controlling a working state of the speed adjustment unit, and the speed adjustment unit is used for receiving the signal of the control unit and adjusting the current rotational speed in the driving unit. The rotational speed in the driving unit is correspondingly increasedor reduced through detecting the stator coil temperature by the control unit, so that the purpose of improving the efficiency or reducing the stator coil temperature is achieved, and warning and shutdown protection are provided.
Description
technical field [0001] The invention relates to the field of electric servo transmission, in particular to an anti-demagnetization system and method. Background technique [0002] There is an alternating current changing at a certain frequency in the coil of the AC permanent magnet servo motor. As the current changes, the electromagnetic field generated by the coil is also constantly changing. Due to the influence of the skin effect, the current density and penetration depth of the magnetic pole surface of the rotor are relatively large, and the heat loss is relatively high. In this case, the magnetic steel is easily demagnetized due to overheating, resulting in complete failure of the motor or failing to meet the expected performance requirements, greatly shortening the service life of the motor rotor. Contents of the invention [0003] The purpose of this section is to outline some aspects of embodiments of the invention and briefly describe some preferred embodiments. ...
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IPC IPC(8): H02P29/60H02H7/085
CPCH02H7/085H02P29/60
Inventor 王磊陈斌
Owner ATLAS COPCO WUXI COMPRESSOR