New Energy Vehicle Water Pump Solution Based on Infineon MOTIX™ Embedded Power ICs

With the improvement of automobile electrification, the progress of automatic driving and intelligence, the application of motors in cars will increase, and the types and drives of motors are also changing. Traditional mechanical drive or motor relay control is shifting towards PWM (pulse width modulation) speed regulation and BLDC (brushless DC) motor control. As the name suggests, the automotive electronic water pump is a water pump with an electronic control drive unit used in automobiles. It is mainly composed of three parts: overcurrent unit, motor unit and electronic control unit. Because it has an electronic control unit, the working state of the water pump can be adjusted at will, such as: controlling the start/stop of the water pump, flow control, pressure control, anti-dry running protection, self-maintenance and other functions, and the working state of the water pump can be controlled by external signals. The power of electronic water pumps is relatively small, generally below 1000W, and the motor generally uses a brushless DC motor. The electronic water pump has many advantages such as compact structure, easy use, powerful functions, long life, stable performance, low noise, low energy consumption, high efficiency, etc., so it is deeply favored by industry insiders. With the rapid development of industry, the application field of electronic water pumps is becoming more and more extensive, especially in the field of new energy vehicles.

Pinjia Group has been committed to the design and promotion of automotive industry product solutions. This solution is an automotive water pump motor control solution developed based on Infineon MOTIX™ Embedded Power ICs. The main features of this solution are high efficiency, low noise, high reliability, intelligence and high dynamic response. Compared with solutions from other semiconductor companies, the advantage of this solution is that the chip uses the cortex-M3 core and integrates BDRV, charge pump, LIN BUS, LDO, and CSA. At present, this solution has been used in car manufacturers such as Great Wall, FAW, SAIC, BYD, Geely, and Hozon.

►Scenario application diagram

►Product physical image

► Display board photos

►Solution Block Diagram

►Core technology advantages

1): 32-bit Arm® Cortex®-M3 core at up to 40MHz;

2): Flash up to 256KB, include 4K EEPROM emulation;

3): 14-bit Sigma-Delta ADCs;

4): 10-bit SAR ADC for sensing;

5): NFET drivers with charge pump;

6): Integrated LIN transceiver compatible with LIN standard 2.2 and SAE J2602-supports fast programming via LIN;

7): Timers for PWM signal generation for 3 Phase motor control;

8)：On chip oscillator & PLL;

9): Current sense amplifier;

10): Grade-1 & Grade-0 Qualification.

►Solution Specifications

1): Sensorless FOC, saving hall costs.

2): speed up to 5000RPM.

3): Overvoltage, undervoltage, short circuit, open circuit, overcurrent, and overtemperature protection.

4): Current, Speed ​​PID;

5): Support LIN communication and LIN upgrade.

6): Support PWM speed regulation.