STMicroelectronics has released two reference designs that simplify the construction of complete industrial or household compressor motor drives with the STSPIN32 motor control system (SiP). Each integrates the motor controller with a three-phase inverter to power the motor and an offline converter and auxiliary circuit. A production-ready PCB design and motor control firmware are also included.
The STEVAL-CTM011V1 is intended for general industrial compressors up to 250W and the STEVAL-CTM012V1 meets strict eco-design regulations for use in household appliances. Plug-and-play reference designs easily combine with a host system to start driving a motor and allow customers to adjust settings for optimal performance. Both guarantee an average efficiency of over 96.5%.
At the heart of each project, ST's STSPIN32F0601Q Motor Control SiP contains an Arm Cortex-M0 STM32F031 microcontroller to customize motor control to the specific needs of the end application and a robust 600V three-phase gate driver for the inverter. The supplied firmware includes high-efficiency sensorless field-oriented control (FOC). The SiP is a compact, thermally efficient quad flat lead-free (QFN) device that meets high leakage requirements for safety and reliability.
The offline AC/DC converter is a VIPER122 analog converter that integrates control logic with an 800V avalanche-resistant power section. Frequency swing prevents interference with other equipment, while low power consumption and support for light load burst mode operation help meet energy saving regulations.
The inverter stage of the 250W STEVAL-CTM011V1 reference design for industrial and general-purpose applications comprises six rugged STGD5H60DF insulated-gate bipolar transistors (IGBTs). They are designed to maximize efficiency at high switching frequencies, allowing for smaller capacitive and magnetic components. Furthermore, its low thermal resistance increases reliability and precise parameter distribution aids in safe paralleling in high power applications.
The STEVAL-CTM012V1 home appliance reference design contains six STPOWER STD8N60DM2 600V N-channel MDmesh DM2 power MOSFETs. They are ideal for high-efficiency converters, including zero-voltage switching (ZVS) phase-shift converters, combining high speed, low-loss switching performance and low on-state losses.
The production-ready circuit board design saves significant development time by avoiding complex layout and signal routing challenges. The compact contour of the 11.2 x 7.5 cm plate helps fit industrial and appliance formats.
