In battery electric and hybrid vehicles, a fast and accurate rotor position measurement is essential for efficient e-motor controls. A precise position signal from standstill (0 rpm) to maximum rotation speed (100,000 rpm) is required for high torque and efficiency of the traction drive and more power and extended driving range of the vehicle.
Download this datasheet to learn more about the SPINpad.
KYOCERA AVX has developed a new type of resolver based on an active system in a two-PCB design. The High-Speed Rotation Position Technology (HSRP) is partially based on KYOCERA AVX’s mature Autopad technology.
As the next step in development, the new antenna system of the SPINpad position sensor and the development of a new IC allow for the accurate high-speed measurement of e-motors.
The main components of the inductive system are the static element called Pad, a PCB with its transmitting and receiving antennas and the rotating target as an activated resonant element. The sensor is characterized by its flat envelope, low weight, and its minimal impact on rotation and acceleration.
Driven by a 5 Vdc supply voltage, the MCU can be reduced to one voltage level. Transmitting on trigger frequencies by about 4 MHz, magnetic fields of the e-motor do not affect the measurement. Due to its immunity a shielding against the E-motor can be eliminated for a reduction of components and less required assembly space.
For safety-critical applications the sensor is developed according ISO 26262. Combined with KYOCERA AVX’s innovative encapsulation technology the SPINpad is reliable against the harsh environment of transmission oils.
Features
- Flexible designs, can be matched to motor pole-pairs giving positional accuracy < 0.5deg electrical
- Different targets available
- Signal immediately after power on
- High speed up to 100,000 rpm
- Ready for ASIL C (D) or with redundant measurement ASIL D (D)
- Immune to low frequency magnetic fields
- Small package size, flat design
- Temperature range: -40° to 160° C
Filed Under: Sensors, Technology News