Jinxin Electronics launches automotive air conditioning compressor solution

Release time：2024-07-25 Source：Original

By adjusting and controlling the temperature, humidity, air cleanliness and air flow in the cabin to the best state, the car air conditioner provides a comfortable environment for the driver and passengers and improves the driving experience. As the heart of the automotive air conditioning refrigeration system, the air conditioning compressor plays a role in compressing and transporting refrigerant vapor.

In order to enable the car air conditioner to achieve fast start, fast cooling and heating, stable operation, energy saving and silence, the car air conditioning compressor as the heart needs to provide strong performance support. In response to the above application needs, Jinxin Electronics has launched an automotive air conditioning compressor solution. The scheme takes the 32-bit DSP automotive chip ADP32F035BQ as the control core, and uses the self-developed non-inductive FOC control algorithm for the automotive air conditioning compressor, which can well observe the speed and torque of the load, and has the characteristics of fast and reliable starting, large torque at low speed, stable operation at high speed, low noise and high efficiency.

Air conditioning compressor scheme

Product Parameters:

Hardware composition: ADP32F035BQ + IPM

Working Voltage: DC 360V/ 540V

Power: 3000~4000W

Motor: PMSM motor

Control algorithm: Dual resistance/single resistance non-inductive FOC control

Protection functions: over-voltage, under-voltage, over-current, phase loss, blocking protection, etc

Scheme features:

It has a strong load-on-load start-up capability, which improves the success rate of on-load start-up

Weak magnetic speed up function, smooth in and out of weak magnet

The use of self-developed algorithm scheme makes the motor control more stable

Main control chip characteristics

ADP32F035BQ is a high-reliability automotive DSP chip designed for automotive motor drivers, air conditioning compressors, automotive OBCs, DC/DC converters, etc., with high cost performance and excellent control performance.

Frequency	100MHz
Acceleration unit	CLA controls algorithm accelerators
Storage resources	36KB RAM/128KB Flash
Communication interface	SPI/SCI/I2C/LIN/CAN
peripheral	12PWM+3CAP+QEP+delay filtering
Simulate peripherals	3 Comparators + 14-channel ADC + temperature sensor + dual sample hold
Motor drive method	sensitive/non-inductive square waves; Sensible/non-inductive string waves

Table 1 ADP32F035BQ main resources

Control/power circuitry

The control circuit adopts ADP32F035QP64Q chip, the power circuit adopts intelligent power module IPM, the current sampling technology of the lower bridge arm, and the CAN communication circuit, as shown in the figure below:

Power supply circuit

CAN communication circuit

main control circuit

Power module circuit

Test conditions and current waveforms

The core electronics laboratory has the load test conditions of the automotive air conditioning compressor, which can freely change the test conditions of the compressor, back pressure, balance pressure, etc., and the figure below is the test platform of the core electronic compressor.

Based on the above design ideas, our company has launched a board-level solution, and the following is the current waveform of the product during operation.

Run the waveform

Start the waveform

Technical support

Jinxin Electronics can provide customers with the schematic diagram, PCB reference board diagram, source code, and software and hardware development technical support corresponding to the above solution, if you need to know more about the details of the solution, please call 0731-88731027.