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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 / MM32SPIN0230 microcontroller, the refrigerator compressor takes MM32SPIN05TUOP / MM32SPIN0230 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℃

MM32 MCU Model:

MM32SPIN0230 Series

MCU Specifications:

- Arm® Cortex-M0 core, operating at a frequency of up to 96MHz
- 32KB Flash, 4KB SRAM
- One 12-bit analog-to-digital converter ADC, 11 channels supported and sampling rate 1Msps
- Four general-purpose timers and one PWM advanced timers for motor control
- Supports UART/SPI communication
- Embed two operation amplifiers and two comparators for motor applications

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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