Shenghe Motor logoShenghe MotorAir Purifier
Request QuoteGet Catalog
Application — Air Purification

Brushless Motor For Air Purifiers And Silent Fan Drives.

Air purifier buyers judge a product by two things: how clean the air gets and how little noise the unit makes. Brushless DC motors eliminate brush friction and commutator whine, reducing motor noise to below 30 dB on low speed while delivering the airflow that HEPA filtration demands. Shenghe builds ultra-quiet BLDC fan motors for residential air purifiers, commercial fresh air units and industrial dust collection systems.

  • 12V / 24V DC, adapter or battery powered
  • 20W — 200W covering portable to commercial units
  • Ultra-low noise: under 30 dB(A) on low speed
  • Long life: 20,000+ hours continuous operation
Request Quote Get Catalog WhatsApp
Why BLDC In Air Purification

What Replaces AC And Brushed Motors In Fan-Driven Air Products

  • Ultra-low noise — no brush chatter, no commutator whine
  • 85-92% efficiency improves Energy Star CADR/watt ratio
  • Variable speed maintains target airflow as filters load
  • 20,000+ hour bearing life for continuous 24/7 operation
  • Compact outer diameter fits slim tower and wall-mount designs
  • No carbon dust from brushes contaminating clean air output

Typical Air Purifier Motor Spec Range

ParameterRange
VoltageDC 12V / 24V
Rated power20 W — 200 W
Motor speed500 — 3000 RPM
Noise level< 30 dB(A) at low speed
Efficiency85% — 92%
Bearing life> 20,000 hours
Motor diameter42 mm — 90 mm
FeedbackHall sensor, FG tachometer output

Typical Air Purification Use Cases

  • HEPA air purifiers: Centrifugal and axial fan drives for residential and office units with multi-stage filtration
  • Industrial dust collectors: High-static-pressure blower motors for workshop and factory air cleaning
  • Cleanroom fans: FFU (fan filter unit) motors for semiconductor, pharma and food processing cleanrooms
  • Fresh air ventilation: ERV and HRV core fan motors for whole-building mechanical ventilation
  • Vehicle cabin filters: 12V BLDC fan motors for automotive and heavy equipment cabin air purifiers
  • Portable air cleaners: Battery-powered personal and desktop air purifiers for travel and office
  • Fume extractors: Benchtop solder fume and laser fume extraction fan drives

Technical Details For Purifier OEMs

  • Dynamic balancing: Rotor balanced to G2.5 or better to eliminate vibration-induced noise
  • Sinusoidal drive: FOC controller reduces torque ripple to under 2% for whisper-quiet operation
  • Constant-airflow mode: Firmware automatically increases speed as filter resistance grows
  • Sleep mode current: Controller draws < 0.3 W standby for always-on air quality monitoring
  • PWM speed input: 0-10V or PWM signal from air quality sensor board controls fan speed
  • RoHS / REACH compliant: All materials meet consumer electronics regulatory requirements

Motor For Your Air Purifier?

Send your target airflow (CFM or m3/h), static pressure, noise limit, motor diameter constraint and quantity. We recommend a motor-fan combination optimized for your purifier design and quote within one working day.

Request Quote Get Catalog WhatsApp