Rotation detecting structure of electric motor and its detecting method
A detection method and motor technology, which is applied in the field of motors, can solve the problems of HALL schemes that cannot output waveforms, high cost of HALL effect sensors, and increased difficulty in electromagnetic compatibility design, so as to achieve simple and easy connection circuits, and improve reliability and authenticity , the effect of simple structure
Active Publication Date: 2008-07-23
GUANGDONG ZHAOQING L&V
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Problems solved by technology
[0003] (1) The cost of the HALL effect sensor is high, and the configuration requirements are high. It is necessary to use a special and more complicated HALL circuit, ring magnet or other electronic output components. The HALL sensor circuit also increases the difficulty of electromagnetic compatibility design.
[0004] (2) There are many intermediate links from signal sampling to signal output, and there are many links that lead to failure. The reliability of the circuit components themselves and the connection will affect the output of the signal
For example, the demagnetization of the ring magnet or the damage of any electronic component in the HALL circuit may cause the HALL scheme to fail to output the correct waveform, and the detection reliability is low
[0005] (3) The HALL sensor circuit and its accessories will increase the volume of the product
The service life of the HALL detection device is limited by the service life of HALL components and ring magnets
Method used
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Embodiment Construction
[0032] Figure 1 to Figure 7 Shown are embodiments of the invention, such as figure 1 As shown, the motor includes a magnetic tile 1, a silicon steel sheet 2, a winding 3, a bearing 4, a rectifying rotating device 5, a positive pole brush 6 and a negative pole brush 7, and the rectifying rotating device is a commutator with an eight-pole commutating piece 9. Such as figure 1 As shown, the rectifying rotating device is divided into upper and lower sections along the direction of the motor shaft, and the lower section is the power connection section, as shown in figure 2 As shown, it is connected in contact with the positive electrode brush 6 and the negative electrode brush 7. The upper section is the potential detection section, such as image 3 As shown, an insulating layer 8 is provided at every other pole along the circumferential direction, so that the commutator segments 9 and the insulating layers 8 are alternately arranged at intervals. The corresponding potential ...
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This invention discloses a rotation detection structure of a motor including a commutation rotation device, a positive brush and a negative brush, in which, the rotation device is divided into two sections along the shaft direction, one of which is a supply connection section contacting with the brushes, the other is a potential detection one spaced regularly axially and having insulation layers and a potential detecting piece is set corresponding to the section forming a sliding contact with the commutation rotating device. This invention also discloses a detection method including: the positive and negative brushes are connected with the voltage output of the motor circuit, the detector is connected with the signal input of the filter circuit and the output of which is connected with the outer signal display devices, when the motor rotates, the detector detects the zero potential and high potential periodically and alternately to form regular rectangle waves to detect the rotation of the motor.
Description
technical field [0001] The invention relates to a motor, in particular to a motor rotation detecting structure and a detecting method thereof. Background technique [0002] At present, for the rotation detection of the motor, it is usually to connect a HALL effect sensor (Hall effect sensor) to the motor circuit, and then output the collected signal to the HALL circuit through the ring magnet or other electronic components, through which the effective output Waveform to observe the operation of the motor. However, this detection technology has the following disadvantages: [0003] (1) The cost of the HALL effect sensor is high, and the configuration requirements are high. It is necessary to use a special and more complicated HALL circuit, ring magnet or other electronic output components. The HALL sensor circuit also increases the difficulty of electromagnetic compatibility design. [0004] (2) There are many intermediate links from signal sampling to signal output, and th...
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IPC IPC(8): H02K29/06G01R31/34
CPCH02K13/00H02P6/182H02K23/66H02K11/0015H02K11/21
Inventor 黎志航虞建军
Owner GUANGDONG ZHAOQING L&V