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Refrigerator compressor

The compressor is the heart of the refrigeration system. It inhales the low-temperature and low-pressure refrigerant gas from the inspirition tube, drives the piston through motor to compress such gas and discharges the high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle, thus realizing the refrigeration cycle of compression→ condensation → expansion → evaporation (heat absorption). The compressor consists of shell, motor, cylinder, piston, control equipment (starter and thermal protector) and cooling system.

Based on MindMotion’s MM32SPIN05TUOP microcontroller, the refrigerator compressor takes MM32SPIN05TUOP as its main control.



Refrigerator compressor


MM32 MCU Model：

MM32SPIN05TUOP

MCU Specifications：

- Arm® Cortex-M0 core, operating at a frequency of up to 72MHz
- 32KB Flash, 4KB SRAM
- Include 12-bit ADCs, with the sampling speed up to 1Msps
- Five general-purpose timers and one PWM advanced timers for motor control
- One I2C interface, two SPI interfaces, two UART interfaces
- Embed one operation amplifiers and five comparators for motor applications
- Working voltage: 2.0V~5.5V
- Working temperature range: -40℃ to +85℃

Features:

- Single resistor sensorless FOC control to save cost and board space
- Back pressure (0.7Mpa) and equilibrium pressure (0.4Mpa) startup
- Rotational speed closed-loop control to maintain high accuracy within the full rotational speed range
- Limited power control
- Weak magnetic acceleration and MTPA, low speed with high efficiency
- Vibration suppression algorithm and ultra-quiet working mode
- Sliding mode control and primary energy efficiency
- Overcurrent, over-and under voltage, block running and startup protection

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