STMicroelectronics STEVAL-CTM014A Reference Design
STMicroelectronics STEVAL-CTM014A Reference Design has been designed to drive a 3-phase brushless DC motor up to 700W, typically of a washing machine appliance. The circuit is composed of four distinct parts: the control section, the compressor drive section, the auxiliary power supply circuit, and the communication circuit.
The control part utilizes the STM32G431CB as the primary control chip, primarily used to control motors. It also includes current, voltage, temperature sampling, communication realization, overcurrent protection, overvoltage protection, and overtemperature protection.
The compressor drive part includes a three-phase inverter circuit, with lower bridge current sampling of the IPM (current sampling is realized by the STM32G431CB's internal integrated operational amplifier). The three-phase inverter bridge adopts the STGIPQ8C60T-HZ intelligent power module. The STGIPQ8C60T-HZ features six IGBTs, gate drive circuits, NTC temperature sampling, and overcurrent comparison circuits.
The auxiliary power supply circuit includes a transformer, a switching power supply controller, a power switch tube, a rectifier diode, and other components. The VIPER122 integrates a switching power supply control chip and a power MOSFET, and also has short-circuit protection functions. Mentioned functions simplify the design of the power supply and reduce its size.
Regarding the communication circuit, the STMicroelectronics STEVAL-CTM014A features a single-line, half-duplex serial communication circuit with isolation, enabling convenient communication with the washing machine control panel. A typical application for this reference design is motor control.
Features
- Motor control solution for a 3-phase BLDC up to 700W
- Compliant with the current STM32 ZEST software algorithm
- 230VAC/50Hz input voltage
- 16kHz inverter switch frequency
- DC bus overvoltage protection
- Overcurrent protection in the intelligent power module (IPM)
- Over-temperature protection in the IPM
- Three-shunt current sensing
- Back electromotive force sampling of the motor
- STLINK-V3 connection for debug and configuration
- Isolated one-wire half-duplex serial communication
- Control stage based on STM32G431 to perform motor control algorithms, current, voltage, and temperature sampling
- Power stage based on the STGIPQ8C60T-HZ IPM
- NTC (UL 1434 CA 2 and 4)
- UL 1557, file E81734
Related Products
STMicroelectronics STM32G4 Mixed-Signal Microcontrollers (MCUs)
Combines a 32-bit Arm® Cortex®-M4 core (with FPU and DSP instructions) running at 170MHz.
STMicroelectronics STGIPQ8C60T SLLIMM Nano 2nd Series IPM
Provides a compact, high-performance AC motor drive in a simple, and rugged design.
STMicroelectronics VIPER122 High Voltage Converter
Combines a 730V rugged power MOSFET with PWM control.
Complete Your Design
STMicroelectronics Standard Products
A broad range of drop-in replacements for general-purpose analog ICs, discretes, and serial EEPROMs.