Renesas Electronics launches IPS2550 magnetless inductive position sensor

At present, the global automotive industry is accelerating into the era of "electrification". An obvious trend is that brushless motors are replacing traditional motors as the "new darling" in the automotive field. And as the industry’s demand for motor performance continues to increase, motor commutation The way has also changed dramatically. Among them, the use of inductive position sensors broke the pattern in the field of motor commutation. The so-called inductive position sensor, whose function is to determine the rotor magnetic pole position in a DC brushless motor, thereby controlling the direction of current in the exchange coil, so as to provide higher accuracy and efficiency for motor commutation.

What I want to introduce to you today is the IPS2550 non-magnet inductive position sensor launched by Renesas Electronics. The sensor complies with AEC-Q100 Class 0 automotive certification and is designed for automotive applications. It uses the physical principle of the eddy current effect to detect the position of a metal target moving above a set of coils composed of a transmitter coil and two receiver coils. And the output interface of IPS2550 can be configured as a single-ended output to improve the cost-effectiveness of the system, or configured as a differential output to better suppress common-mode interference.

IPS2550 provides the industry with a thinner and lighter non-contact sensor, which has the high performance and stability required for automotive applications and is flexible and easy to customize, enabling manufacturers to cost-effectively manufacture their own rotation Alternative products for transformers or magnetic sensors. Based on Renesas’ unique inductive position sensing technology, the magnet-free IPS2550 has a maximum speed of 600 krpm (electrical) and is designed around a motor to accommodate the off-axis (through and side-axis) and on-axis positioning.

Compared with other sensing technologies, customers can match the number of sectors to the pole pairs of the motor and improve accuracy in a cost-effective manner. In addition, with its abundant supporting tools, no matter whether it is a novice who has just touched the sensor or an expert in the field of motor commutation, they can easily create tailor-made sensing elements with them.

When the IPS2550 sensor is combined with a Renesas microcontroller (MCU), gate driver, and motor driver, customers can also build complete motor commutation for applications such as traction motors, electronic power steering, starter generators, and other motors solution.

In addition, today I will also introduce the following two successful product portfolios launched by Renesas Electronics based on the IPS2550 sensor:

48V auxiliary inverter

Renesas 48V auxiliary inverter is a 48V motor proof-of-concept control solution. It is equipped with Renesas electronics microcontroller RH850/C1M-A2, inductive position sensor IPS2550, three half-bridge drivers ISL78434, and 12V low voltage isolation A series of high-performance devices such as the flyback converter ISL78215 are suitable for light hybrid electric vehicles (MHEV) combined with high-speed position sensors.

In terms of performance, the solution has a 12V/48V dual power supply concept with domain isolation function, supports shunt-based and Hall sensor-based current sensing, cosine/sine resolver, and rotor position induction sensors, and has DC link voltage measurement And the self-diagnostic monitoring function can effectively improve the safety and reliability of the motor system.

Remote sensing with an inductive position sensor and CAN/LIN

A remote sensing solution consisting of Renesas RH850/F1KM-S1, RL78/F13 microcontroller, RAA270005KFP power management IC, and IPS2550 inductive position sensor, by connecting ECU and inductive position sensor to the throttle grip and console And the accelerator pedal to achieve long-distance transmission. This product is used in E/E architecture vehicles with centralized ECUs, which can reduce the effects of noise and parasitic components caused by long-distance communications.

In terms of performance, the solution supports full-duplex communication (sensor reconfiguration during the entire life cycle, enhanced data security, OTA update), and this solution can provide multiplexed multiple sensors on one interface, thereby Reduce PCB wiring. In addition, remote sensing can be realized by transmitting data through CAN or LIN.