News
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How High Vibration of Load Equipment Damages Motors & Motor Bearings: Causes, Hazards & Solutions
High vibration transmitted from fans, crushers, pumps and other industrial loads is a common hidden fault for industrial motors. Most plant maintenance teams only monitor motor temperature and current, ignoring continuous vibration from connected loads. Long-term abnormal vibration mainly damages...Read More -
IC411 vs. IC416: How to Choose the Right Cooling Method for VFD-Driven Motors
Using a Variable Frequency Drive (VFD) to control motor speed is one of the most effective ways to save energy and optimize industrial processes. However, running a standard motor on a VFD without considering its cooling method is a recipe for premature insulation failure and motor burnout. When ...Read More -
Sliding Bearings vs. Rolling Bearings in High-Voltage Motors: Which Is More Advanced and Longer-Lasting?
Different Working Principles Rolling bearings use balls or rollers to convert sliding friction into rolling friction. They have low starting torque and are simple. Sliding bearings have no rolling elements. The shaft floats on a thin oil film, achieving pure fluid friction. This film also absorbs...Read More -
Industrial Safety Upgrade: The “One-Letter” Difference Between Ex db and Ex db eb Explosion-Proof Motors
In industries like oil, gas, chemical, and pharmaceuticals where explosive gas risks are a daily reality, explosion-proof motors act as the vital heart of safe operations. However, when procurement and technical teams look at explosion-proof markings, a difference of just one or two letters can s...Read More -
Critical Explosion‑Proof Motor Selection: Class I Div 2 Group B Certification Difference in North American Standard
A client from USA recently inquired about replacing existing TECO explosion proof motors used in chemical & energy projects. The original NEMA motor adopted strict North American hazardous area standards: Class I, Div 2, Groups B, C & D Class I, Zone 2, Groups IIB+H₂, IIB & IIA The ...Read More -
Why Load Confirmation is the Foundation of High-Voltage Motor Selection
In heavy industrial applications, High-Voltage (HV) motors are the primary drivers for critical assets. A common mistake in procurement is treating a motor as a standalone commodity based solely on its nameplate power (kW) and voltage (kV). In reality, the motor and the driven equipment operate...Read More -
Does Heating Motor Bearings Lead to Bearing Magnetization?
For large-sized motor bearings, the “hot fitting” process is a common assembly method. This process involves heating the bearing—leveraging the principle of thermal expansion and contraction in metals—to achieve an interference fit between the bearing and the shaft, thereby preventin...Read More -
How Different Mounting Methods Affect Motor Bearing Temperatures?
B35-Mounted Motors: Thermal Dissipation Control Requirements for Bearing Systems Compared to B3-mounted motors, B35 motors are not only secured via their base feet but must also be fixed to the driven equipment through a flange on the end cover. This arrangement ensures and constrains the...Read More -
Ensure Stable Operation: Voltage Fluctuation Adaptability Test for Three-Phase Asynchronous Motors
Voltage fluctuation is a common power anomaly in industrial production, caused by factors such as lightning strikes, short circuits, startup of high-power equipment, and grid switching. Such fluctuations may lead to abnormal operation, failure shutdown, or even damage of three-phase asynchrono...Read More -
Asynchronous Motors Replace Slip Ring Motors: Driving Efficient Upgrade of Industrial Production
In the context of the global industrial transformation towards high efficiency, energy conservation and cost reduction, asynchronous motors have gradually replaced traditional slip ring motors in various industrial fields, becoming the core power support for enterprise production and up...Read More -
Why High-Power Motors Are Designed for High Voltage？
In heavy industry, high-power motors (typically 200kW and above) are almost exclusively engineered as high-voltage (HV) motors—operating at 3kV, 6kV, or 10kV—rather than low-voltage (LV) 380V/660V systems. This design choice is rooted in fundamental electrical principles and delivers overwhelming...Read More -
When 12 mm/s Vibration Meets High-Voltage Motor Bearings
Why load-side vibration exceeds motor limits — and how we address it transparently In a recent inquiry for a high-voltage motor driving a vacuum pump via a rigid coupling, a professional customer raised a critical concern: Could the pump’s high vibration damage the motor bearings? After reviewi...Read More