Hall-Effect Rotary Encoder
Four-element Hall-effect based rotary angle sensor.
Description
The Hall-Effect Rotary Encoder unit simulates a 360-degree rotary angle sensor using four Hall sensors evenly spaced under a rotating magnet. The sensors generate four sine waves.
The equations
The voltages between the elements of a steering angle sensor are described by the equations:
Where:
-
- voltage between elements and ,
-
- voltage between elements and ,
-
and - voltage amplitudes for axes and , reflecting the sensitivity mismatch,
-
and - voltage offsets for axes and ,
-
- quadrature error.
The rotation angle is calculated by the formula:
Ports
Non-directional
R - encoder shaft
`rotational mechanics
Mechanical rotational port corresponding to the positive connection of the transducer.
C - sensor housing
`rotational mechanics
Mechanical rotational port corresponding to the negative (reference) connection.
yp is the positive terminal associated with the Hall voltage occurring along the y-axis
electricity
Positive electrical port associated with the Hall sensor output in the positive direction of the y-axis.
Dependencies
To enable this port, set Output interface to `Electrical connections'.
yn is the negative terminal associated with the Hall voltage occurring along the y-axis
`electrical'
Negative electrical port associated with the Hall sensor output in the negative y-axis direction.
Dependencies
To enable this port, set Output interface to `Electrical connections'.
xp is the positive terminal associated with the Hall voltage occurring along the x-axis
electrical
Positive electrical port associated with the Hall sensor output in the positive direction of the x-axis.
Dependencies
To enable this port, set the Output interface parameter to Electrical connections
.
xn is the negative terminal associated with the Hall voltage occurring along the x-axis
electrical
Negative electrical port associated with the Hall sensor output in the negative x-axis direction.
Dependencies
To enable this port, set the Output interface parameter to Electrical connections
.
Parameters
X-axis voltage amplitude - x-axis voltage
`2.5 V (by default)
x-axis voltage amplitude.
Y-axis voltage amplitude - y-axis voltage amplitude
2.5 V (by default)
Y-axis voltage amplitude.
X-axis voltage offset - x-axis voltage offset
0 (By default)
Potential difference when an electric current flows through a conductor in the absence of an external magnetic field along the x-axis.
Y-axis voltage offset - y-axis voltage offset
0 (By default)
Potential difference when an electric current flows through a conductor in the absence of an external magnetic field along the y-axis.
Quadrature error - quadrature error
0 (by default) | scalar
The magnitude of the quadrature error. Quadrature switching can reduce offset errors.
Output interface - interface for decoded information
Electrical connections (by default)
| Decoded angular position
Interface for decoded information, available values:
-
Electrical connections (by default)
. -
Decoded angular position
.