Permanent magnet motor rotor position - speed detection device
A rotor position and rotational speed detection technology, applied in the direction of electronic commutator, etc., can solve problems such as complex methods, inability to obtain the initial angle of rotor position, easy to generate micro-vibration, etc., and achieve simple hardware structure, flexible communication rate and data volume configuration , Versatility and adaptability
Active Publication Date: 2019-08-27
NAVAL UNIV OF ENG PLA
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Problems solved by technology
Among them, the grating encoder cannot obtain the initial angle of the rotor position in a static state, and can only realize the detection of the dynamic rotor position-speed. An additional control algorithm is required to obtain the initial angle. This method is complex and prone to micro-vibration, so it is rarely used. For permanent magnet synchronous motor rotor position-speed detection
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[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0028] Such as figure 1 As shown, the present invention provides a permanent magnet motor rotor position-speed detection device, which is characterized in that it includes a timing controller, a peripheral communication interface, a digital converter, an excitation signal conditioning circuit, a rotary transformer, and a feedback signal conditioning circuit: in,
[0029] As a position sensor, the resolver includes a stator and a rotor; among them, the stator includes 1 set of excitation winding and 2 sets of feedback winding; when the excitation winding is fed with AC excitation current, the feedback winding will output an analog signal containing rotor position information to the feedback signal conditioning Circuit; the rotary ...
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The invention discloses a permanent magnet motor rotor position-rotation speed detection device. The device comprises a time sequence controller, a communication interface, a digital converter, analog conditioning circuits and a rotary transformer. According to the time sequence controller, an excitation signal is generated by configuring the digital converter and is amplified by an excitation signal conditioning circuit, and an excitation current with rated amplitude and power is provided for the rotary transformer. Under the effect of the excitation current, the rotary transformer feeds back a signal containing position information, and filtering and amplitude modulation are carried out on the signal through a feedback signal conditioning circuit. The digital converter resolves a position, a rotation speed and device fault information of a current rotor according to the feedback signal. The time sequence controller sends the resolved position, rotation speed and device fault information to an upper layer controller through Manchester encoding, thereby realizing detection of the position and the rotation speed. The device has the advantages of high detection precision, high applicability, flexible configuration, high reliability and applicability to a digital control system and is particularly applicable to a synchronous motor control system.
Description
technical field [0001] The invention belongs to the field of medium and high-power electric transmission, and in particular relates to a permanent magnet motor rotor position-speed detection device. Background technique [0002] With the development and promotion of new permanent magnet materials, new electromechanical conversion equipment represented by permanent magnet synchronous motors has become an important part of the field of electrical transmission. Due to its high power density, high reliability, good control performance, low vibration and noise, permanent magnet synchronous motors have been widely used in automotive power, locomotive traction, and shipbuilding industries. Especially for applications with high vibration and noise requirements, permanent magnet motors have advantages that conventional AC motors cannot match. [0003] In the permanent magnet synchronous motor control, the control inverter needs to determine the coordinate axis of the rotating coordi...
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IPC IPC(8): H02P6/17
Inventor 艾胜任强程思为肖飞胡亮灯曾启帆谢帧康军王钰熊又星
Owner NAVAL UNIV OF ENG PLA