Ready to evaluate this sensor technology in a test setup? Dynamometer test bench? Or whatever your test setup is? This is the fast way to do it – get the SG210 reference design and mount it on your test bench to start collecting data. This reference design comes complete with CAD drawings and allows for easy testing of both the torque measurements and the absolute angle measurement.
The sensor is based on the SG30 Sensor Kit integrated in a standard industrial form factor.
Features
- Fast torque, angle, temperature, and cadence output
- Contactless, zero friction, and magnet-free
- ±300Nm rated torque, Ø20mm shaft
- Total torque offset error ≤0.6% of FS including hysteresis and temperature
- Low power consumption (50mA/5V)
- Adjustable airgap for evaluation of link performance
- 360-degree absolute angle output (x2)
- 1ms sample period, digital serial port output
Specifications
Measurement
- Torque range (rated): -300Nm to +300Nm
- Torque resolution: 4096 steps/LSB ~ 12 bits
- Absolute angle: 0-359 deg in 1 deg steps (x2)
- Cadence: -220 RPM to +220 RPM (derived from angle)
- Sample rate: 1000 Sa/s (1 ms sample period)
Mechanical
- Total weight: 1800g
- Shaft diameter and tolerance: 20mm (g6)
- Box size excluding shaft: 68x68x68mm
- Surface treatment: Electroless nickel plating
- Axial length (rotor + stator + 1.5 mm airgap)*: 9 mm
- Airgap range (axial direction): 0.3 to 2.5 mm
Electrical
- Supply voltage: 3.3V to 5.5V
- Current consumption: 50mA (max)
Interface
- Connector: Binder 09 0173 300 08
- Serial interface: UART 0-3.3V levels, 230 400 baud, N81
- Simple binary protocol including CRC*
Environmental
- Temperature range (operational): -20C to +85C
- Humidity: DIN 79009, 5.2.1
- Vibration: DIN 79009, 5.2.3
- Shock: DIN 79009, 5.2.2
- Protection (casing): IP4x (can be sealed to IP67 by changing to sealed bearings and adding lid o-ring)
- Protection (electronics): Overmolded sealed for operation in motor housing (oil or grease)
*) According to GD10950 (request copy) or customized
Documentation
To understand why torque sensors based on strain gauges are superior to torque sensors based on the magnetostrictive/magnetoelastic principle in e-bike applications, read our white paper comparing the two.