Home Appliance Motor Control Solution

This solution supports various motor types used in home appliances: (1) BLDC motors - commonly used in inverter air conditioners and washing machines for high efficiency. (2) PMSM motors - permanent magnet synchronous motors for compressor applications with excellent efficiency. (3) Induction motors - traditional AC motors that can be controlled with V/F algorithm. (4) The FOC (Field Oriented Control) algorithm provides precise torque control for BLDC and PMSM motors. (5) V/F control can be used for simpler induction motor applications. The solution is optimized for 0.5-2.5kW motors typical in residential appliances.

The solution includes comprehensive protection features: (1) Overvoltage protection (OVP) - monitors DC bus voltage and shuts down if exceeds 400V. (2) Undervoltage protection (UVP) - prevents operation if DC bus drops below 200V to avoid unstable control. (3) Overcurrent protection (OCP) - cycle-by-cycle current limiting at 20A peak with hardware fast shutdown. (4) Overtemperature protection (OTP) - NTC thermistor monitors heatsink temperature, derates at 80°C, shuts down at 100°C. (5) Short circuit protection - responds within 2μs to protect IGBTs. (6) All protections are automatic recovery type - system restarts when fault clears.

We provide comprehensive development support: (1) Reference design - complete schematics, PCB layout, and BOM for typical applications. (2) Software libraries - FOC control algorithm with source code for popular MCUs (STM32, GD32). (3) Technical documentation - application notes for thermal design, EMI optimization, and PCB layout. (4) Evaluation kit - populated PCB with test points and programming interface. (5) FAE support - on-site or remote technical assistance for design review and debugging. (6) Training - online and in-person training sessions on motor control fundamentals. (7) Sample code - working examples for air conditioner and washing machine applications.

The solution achieves excellent efficiency across the operating range: (1) Inverter stage efficiency - 96-98% at rated load using SGM15N60 IGBTs with optimized switching. (2) Motor efficiency - 90-94% depending on motor type and speed. (3) System efficiency - 85-92% overall including control losses. (4) Efficiency varies with load - typically 90% at 50% load, 92% at 100% load. (5) Standby power - <5W when motor is stopped. (6) Compared to traditional on/off control, inverter solution saves 30-50% energy. Actual savings depend on application duty cycle. For air conditioners, annual energy savings of 30-40% are typical.

Typical development timeline: (1) Evaluation phase - 2-4 weeks to test reference design with your motor. (2) Customization - 4-6 weeks to adapt hardware and software for your specific requirements. (3) Prototype - 2-3 weeks for PCB fabrication and assembly. (4) Testing - 4-6 weeks for functional, reliability, and safety testing. (5) Certification - 4-8 weeks for required safety certifications (CE, UL, etc.). Total time from start to production: 4-6 months for experienced teams, 6-9 months for first-time developers. We can accelerate this with our FAE support - some customers have achieved production in 3 months with intensive support.

The solution is designed to meet major safety and EMC standards: (1) Safety - IEC 60335-1 for household appliances, IEC 60730 for automatic controls. (2) EMC - CISPR 14-1 for conducted emissions, IEC 61000-4-x for immunity. (3) Efficiency - meets or exceeds energy efficiency regulations in major markets. (4) Components - all Silan devices are AEC-Q101 qualified and RoHS compliant. (5) We provide test reports for reference design to accelerate your certification process. (6) Our FAE team can assist with pre-compliance testing and design modifications if needed. Most customers pass certification on first attempt using our reference design.