Phase Shift Torque Generation
Key Parameter Matching
Motor Type | Standard Capacitance Range | Typical Voltage Rating |
---|---|---|
Household appliances | 1-100μF | 250V/400V |
Industrial medium power | 100-500μF | 400V/600V |
Refrigeration compressors | 150-300μF | 600V/1000V |
Visual Inspection
✓ Oil leakage (>30% capacity loss)
✓ Shell bulging (internal short circuit indicator)
✓ Fuzzy labeling (verify capacitor code interpretation)
Multimeter Measurement
Bypass Verification Method
Temporarily parallel with high-quality capacitor (≥80% of failed capacitance)
→ Normal operation confirms original capacitor failure
Aftermarket Component Risks
✓ Counterfeit characteristics: Brittle aluminum foil / Dielectric stratification / Abnormal ESR
✓ Authentication tips: Genuine manufacturers use laser anti-counterfeit codes on bottom
Special Environment Adaptations
Operating Conditions | Recommended Capacitor Type | Special Requirements |
---|---|---|
High temperature | Polypropylene film capacitors | 20% capacity margin required |
Frequent start-stop | Metallized polypropylene capacitors | Avoid direct insertion mounting |
Continuous full-load | Parallel dual capacitors system | Include voltage balancing resistors |
When no exact replacement is available:
Capacitor Parallel Connection
Total capacitance
Example: 200μF needed → Use four 50μF capacitors in parallel
Star-Delta Starting
Implement contactor-based voltage reduction for starting
Applicable to motors above 3kW, efficiency loss ~15%
R&D center: Headquarters Dongguan
Manufacturing center: Susong, Anqing, Anhui