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1. Application Scenarios
Industrial automation equipment includes PLCs, servo drives, stepper drives, industrial robots, motion controllers, etc., with power ranges from tens of watts to tens of kilowatts.
2. The Role of the Product in the System
| Product Category | System Function |
| Rectifier bridge | Three phase/single-phase AC rectification to DC bus |
| Fast recovery diode | IGBT freewheeling diode, output rectifier |
| SBD (Schottky) | Control board auxiliary power output rectification |
| SiC diode | High end servo PFC level, improving efficiency |
3. Recommended Product Model
| Product Category | Recommended Series/Model | Key Parameters |
| Three-phase rectifier bridge | GBJ/KBJ series (15A-50A/600V-1200V) | Strong surge resistance capability |
| Fast recovery diode | FRxx/USR series (600V/1200V) | Soft recovery, low EMI |
| SBD diode | 45V–100V SBD | Auxiliary power output rectification |
4. AC/DC Module Application
● The servo drive front-end consists of a three-phase rectifier bridge and a large capacitor, providing a DC bus
● The auxiliary power supply of the control board adopts a flyback topology
5. Application of PFC Circuit
● High power industrial automation equipment (>5kW) requires the addition of PFC to meet harmonic requirements
● Recommended three-phase PFC or Vienna PFC topology
6. Common Customer Needs
| Demand | Our Response |
| Servo response should be fast (bandwidth>1kHz) | Recommend low Qg MOSFET/IGBT to optimize the driving circuit |
| To adapt to harsh power grid environments (voltage fluctuations ± 20%) | Recommended high voltage and wide voltage input devices |
| Control system EMI should be low (CISPR 11) | Recommend ultra soft recovery diode to reduce ringing |
| To achieve functional safety (SIL level) | Provide device reliability and failure rate data (FIT) |
