Precision OEM/ODM solutions engineered by Ningbo Taojun to optimize global heating, ventilation, and commercial refrigeration networks.
Shaded pole motors remain the mechanical workhorse of B2B refrigeration cooling circuits due to their unmatched structural simplicity and high operational reliability. By employing a copper loop (shading ring) around a portion of each stator pole, a phase lag in the magnetic flux is engineered, producing a rotating magnetic field without auxiliary startup windings or capacitor components.
Modern factories now implement Class B and Class F insulation protocols. Utilizing automatic winding systems, specialized copper alloys, and high-performance laminations, modern shaded pole motors maintain continuous structural integrity even under high-humidity evaporator cycles or high-ambient condenser environments.
To prevent failures during rotor locking conditions (caused by fan blade ice accumulation or debris), leading factories integrate internal thermal protectors or rely on intrinsic impedance designs. This ensures zero fire risk and prevents structural coil breakdown over 10-year lifespan metrics.
While modern EC (Electronically Commutated) motors are growing in market share, the shaded pole motor is favored by refrigeration OEMs due to its low unit cost, ease of maintenance, and high resistance to transient voltage spikes typical of developing power grids.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a beautiful tourist city. Founded in 1988, its predecessor was Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over 30 years of development have allowed us to evolve into a national high-tech enterprise (awarded in 2021) integrating refrigeration parts design, R&D, mass production, and comprehensive after-sales support.
Our leading product lines consist of: high-performance copper filters/driers, check valves, air conditioning valves, wire-tube and fin-type condensers, brass and copper accessories, and general HVAC system components. We have achieved deep market integration, partnering with globally recognized brands including Haier, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Industrial Operations
Manufacturing Plant
Robot Precision Welding
R&D Testing Lab
HVAC/R distributors and refrigeration equipment manufacturers look at key engineering matrices when selecting shaded pole motor factories.
Motors must match country-specific voltages (110V-120V at 60Hz or 220V-240V at 58/60Hz) to support international distribution models.
Startup torque at low ambient temperatures (-35°C in freezers) must remain sufficient to spin the blower wheel without electrical binding.
IP42, IP44, or IP54 enclosures with closed-stator structures to protect windings against water drops, humidity condensation, and dust ingress.
Sleeve bearings with oil reservoir systems or maintenance-free dual ball bearings ensuring 30,000+ continuous running hours.
Our core manufacturing equipment is imported directly from Germany to ensure maximum precision and dimensional stability of copper windings, iron cores, and structural housings.
We have 15 engineers in our R&D center, all of them are doctors or professors from the University of Science and Technology of China, directing our thermodynamic and motor efficiency design frameworks.
High-grade copper, non-shrinkage ITO films, and liquid crystal spacers are sourced directly from Japan. Insulating materials are sourced from leading European suppliers.
All mechanical and electrical components undergo a strict stress testing sequence:
Industrial Assembly Workshop
Automated Production Lines
Environmental Testing Lab
✓ Shell: High purity, rust-resistant, pressure-resistant copper pipe.
✓ Inner core: 3A molecular sieve (water absorption ≥20%) + activated carbon layer.
✓ Sealing process: Precise argon arc welding to guarantee leak-proof refrigeration cycles.
✓ Extended Lifespan: High absorption capacity reduces system moisture and acid corrosion on the compressor unit.
✓ Fast Cooling Performance: Optimized internal structure reduces system flow resistance.
✓ Adaptability: Extensively certified for household freezers, cold rooms, and automotive air conditioning systems.
✓ Refrigerator, mini-bar, and domestic/commercial ice maker repairs.
✓ Commercial refrigeration system maintenance and HVAC updates.
✓ Heat pump condenser units and industrial evaporative cooler fans.
Our company, founded in 1988, has been producing premium refrigeration parts and core filter driers for 41 years (incorporating our early history). Our high structural control ability, vacuum tests, and visual CCD sorting ensure each batch delivered matches the strict criteria required for modern green refrigeration gases.
From a local workshop to an international technology partner: the timeline of Taojun.
Expansion of factory buildings to accommodate domestic HVAC/R component demands.
Introduction of MES intelligent workshop management systems for tracking production cycles.
Upgrade to fully automated green processes and IoT integration on production lines.
Honesty: We prioritize reliable partnerships, premium quality material inputs, and transparent communications with our industrial buyers. Honesty is the true root of Taojun's long-term global growth.
Innovation: Ongoing innovations across motor efficiency, materials research, automated mechanics, and green logistics allow our manufacturing processes to meet changing regulations worldwide.
Responsibility: Providing long lifetime assurances, low environmental footprints, and RoHS/REACH compliance to support customer ESG initiatives.
- Detailed project consulting led by engineers with 15+ years of pump and motor experience.
- Tailored design and testing of motor windings, shaft options, and mounting brackets.
- 24-hour service hotline with technical responses within 8 hours.
- Technical integration training and equipment evaluations.
- Installation support, electrical debugging, and system trouble-shooting.
- 1-year product warranty with free lifetime online technical assistance.
- Continuous feedback loops integrated directly with our production quality management team.
- Long-term supply security programs with flexible MOQ policies and shipping tracking.
Verifiable certifications (GB/T19001-2016/ISO9001:2015 Registration No.: 41325Q00065R0S) for designing and producing filter driers, condensers, access valves, and related refrigeration motor integrations. Validated via CNCA (www.cnca.gov.cn) and Zhongci International.
Main Certification Document
Detailed Scope of Certification
As a premier manufacturing partner, we design our shaded pole motors to meet specific thermal and electromagnetic criteria. Understanding these parameters is crucial for high-efficiency refrigeration and HVAC system designs:
The electromagnetic core is built with high-permeability, low-loss cold-rolled non-oriented silicon steel sheets. Stamping stator laminations with precise automated progressive dies reduces hysteresis loss and eddy current losses, lowering operational heat.
We use high-purity polyurethane-enameled copper wire. Automatic needle winding machines ensure tight layer styling, a high slot fill factor, and uniform copper distribution. This produces reliable torque and heat dissipation under prolonged continuous operation.
Rotors are pressure die-cast using high-conductivity pure aluminum. Every rotor assembly undergoes high-precision dynamic balancing to minimize radial runout and mechanical vibration, extending bearing life and ensuring quiet operation.
| Parameter | Value |
|---|---|
| Rated Voltage | 110V / 220V / 240V |
| Frequency Range | 50Hz / 60Hz |
| Output Power | 2W to 35W |
| Insulation Class | Class B / Class F |
| Bearing Types | Sleeve / Dual Ball |
| Noise Rating | ≤ 38 dB(A) |
Providing information increment for engineers, buyers, and import-export managers sourcing shaded pole motors and refrigeration accessories.
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