CAM Sensor Rotary Type B

Rotary Sensors & Targets Type B: 25mm/30mm/50mm for CAM622

Resonant inductive position sensors and targets for measuring full absolute angle across 360°. The sensor connects to a Resonant Inductive Encoder IC such as the CAM622 to provide high-quality position and velocity data to a host device. The sensor design includes two pairs of PCB coils for detecting the target. Fine coils provide high accuracy and resolution and repeat 3 times around 360°. Coarse coils repeat once around 360° for full absolute measurement of angle. The matching non-contact target design includes a PCB printed resonator coil and SMD capacitor(s). These form a resonant circuit, owered without electrical contact by the sensor’s excitation coil. The resonator coil design is patterned to minimise the effect of misalignments on reported angle. The sensor and target are Type “B3” or “B5”. “B” refers to the resonator frequency band centred on 833kHz. “3” or “5” are the numbers of fine sensor coil periods per coarse.

Features

• Robust, non-contacting, environmentally immune
• Coil patterns fit inside 25/30/50mm PCB diameter
• centre hole to take shafts
• Sensor and Target PCBs built on 4 PCB layers
• Up to 16 bits of noise free resolution with CAM622 depending on gap, environment, filter level
• PCB Gerbers available to customers

Applications

• High-speed closed loop motion control
• Traction motor velocity feedback and commutation
• Pan and tilt sensing for surveillance cameras
• Valve position sensing
• Optical Encoder replacement (more robust)
• Magnetic encoder replacement (more performance)