Renesas Electronics Refrigerator Compressor Digital Inverter
Renesas Electronics Refrigerator Compressor Digital Inverter combines multiple Renesas products to deliver a comprehensive solution. Due to today's power-saving requirements, digital inverters for refrigerators are becoming more popular. A compressor driven by a digitally controlled inverter has the power to adapt itself to the usage habit of the consumer throughout the day, and it can operate at various speeds. It will speed up during the day as users open and close the doors, and at night, slow down to maintain the temperature. This simple action can save users 20% to 30% on an electric bill.
This design combines the 16-bit microcontroller (RL78/G14) and op-amp (READ2302) to ensure an adaptable and robust solution for this type of application. Supporting a power rating up to 350W, this design uses the MCU to control the BLDC compressor motor (180° sine-wave control), and the op-amp is used for motor current sensing using the 3-shunt control methodology.
Features
- Adaptable to different compressors
- Improved system efficiency and energy usage
- 180° sensorless FOC control
Block Diagram
Microcontroller
- RL78/G14
Low power consumption, high function general-purpose microcontrollers
Regulator
- ISL80136
40V, Low Quiescent Current, High Accuracy, 50mA Linear Regulator
Op-Amp
- READ2302
High drivability and high slew rate, input output full range, CMOS dual operational amplifier
Published: 2020-02-10
| Updated: 2024-05-06