Industry Background & Market Demand

Rapid market growth:China’s photovoltaic installed capacity sees sharp growth (143 GW of newly added capacity from January to October 2023, a year-on-year increase of 144.8%).

Changzhou serves as a vital new energy industrial base, with industrial scale accounting for nearly one-tenth of the national total.

PV panels suffer severe contamination; dust accumulation reduces power generation efficiency by 30%.

Manual cleaning has prominent drawbacks: high costs, low efficiency and risks of damaging panels.

Hetai Motor Solutions

Core Product Technologies & Innovative Design

Changzhou Hetai Motors has developed stepper motor and BLDC motor solutions tailored to the performance requirements of photovoltaic cleaning robots.

The motors integrate multiple innovative technologies:Precise winding technology: Star winding structure matched with 120° Hall sensor angle ensures accurate and smooth current commutation.

Optimized thermal management: Class B insulating materials combined with special heat dissipation structures enable stable operation within a wide temperature range of -20℃ ~ +50℃.

Compact design: 42mm diameter body, only 63mm in length (Model 42BLF02) and weight under 0.5kg, delivering ultra-high power density.

Dual sealing protection: IP65 protection rating effectively resists erosion by sand, dust and water mist.

Case 1: Shanghai Tampa Bay New Materials – Distributed Rooftop Cleaning Solution

Challenge: Power generation efficiency of modules at a rooftop power station of a factory in Jiangsu dropped by over 20% due to dust emissions from factory chimneys.

Solution: Tracked robots equipped with Hetai 57 BLDC motors overcome two technical bottlenecks:

✅ Low-profile design (thickness ＜15cm) to adapt to confined space on color steel tile rooftops;

✅ Anti-electromagnetic interference technology ensures stable operation under high-voltage grid-connected environments.

Results: 3 robots cover a 4.42MW rooftop station, construction period shortened by 30%, and verified power generation gain reaches 12.7%.

Case 2: Anhui Zero Carbon New Energy – Intelligent Operation & Maintenance for Large Ground-Mounted Power Stations

Challenge: Daily dust accumulation reaches 0.8mm in northwest wind-sand zones, and the failure rate of conventional robots exceeds 35%.

Solution: Hetai 42 servo motors drive flexible cleaning arms to realize:

Dynamic pressure compensation: Automatically adjust brush pressure according to module inclination angle, achieving over 98% cleaning uniformity;

PV self-power supply system: Combined with laser detection modules to realize closed-loop energy management.

Results: Robot failure rate of the 100MW power station reduced to 4%, cutting annual operation and maintenance costs by 1.8 million RMB.

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