参数资料
型号: AG003-01
厂商: NVE Corp/Sensor Products
文件页数: 113/145页
文件大小: 0K
描述: ASSEMBLY CURRENT SENSOR EVAL
标准包装: 1
传感器类型: 磁性 GMR(大型磁阻传感)
接口: 模拟
嵌入式:
已供物品: 板,CD
已用 IC / 零件: AA 系列电流传感器
相关产品: 391-1054-5-ND - SENSORS MAGNETIC FIELD LP 8-SOIC
391-1052-5-ND - SENSORS MAGNETIC FIELD 8SOIC
391-1050-5-ND - SENSORS MAGNETIC FIELD 8SOIC
391-1049-5-ND - SENSORS MAGNETIC FIELD 8MSOP
391-1048-5-ND - SENSORS MAGNETIC FIELD 8SOIC
391-1045-5-ND - SENSORS MAGNETIC FIELD 8SOIC
391-1032-5-ND - SENSORS MAGNETIC FIELD 8MSOP
391-1030-5-ND - SENSORS MAGNETIC FIELD 8MSOP
AB001-02-ND - SENSORS MAGNETIC FIELD 8SOIC
391-1020-5-ND - SENSORS MAGNETIC FIELD LP 8-SOIC
更多...
其它名称: 391-1004
Application Notes
GT Sensor Operation with Magnetic Encoders
Magnetic encoders generate their own magnetic field, so they are much easier to work with than gear
tooth wheels, as no bias magnet is required for the sensor. Also, magnetic encoders have alternating
north and south magnetic poles on their faces. Therefore the magnetic field is generated by the moving
body, and sensor offset problems are greatly reduced. The following drawing shows a GT Sensor
response to a magnetic encoder:
GMR Sensor
Direction of Sensitivity
GMR Sensor
Resistors R3, R4
Resistors R1, R2
Voltage Output of
GMR Bridge
Rotation
S
N
GMR Sensor
Resistors R3, R4
S
N
GMR Sensor
Resistors R1, R2
Voltage Output of
GMR Bridge
Rotation
S
GMR Sensor
Resistors R3, R4
N
S
N
GMR Sensor
Resistors R1, R2
Voltage Output of
GMR Bridge
Rotation
S
GMR Sensor
Resistors R3, R4
N
S
N
GMR Sensor
Resistors R1, R2
Voltage Output of
GMR Bridge
Rotation
S
N
S
N
Note that in this case, as long as the sensor is positioned symmetrically with the encoder, offset is
minimized. Also note that the GT Sensor provides one full sine wave output for each magnetic pole.
This is double the frequency of a Hall effect sensor, which provides one full sine wave output for each
north-south pole pair. As a result, replacing a Hall sensor with a GT sensor doubles the resolution of
the output signal.
- 113 -
www.nve.com phone: 952-829-9217 fax: 952-829-9189
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