Industrial Electric Motors — HEM Motor

Protection level is stated by the IP code. Our standard production is IP55: complete dust protection plus resistance to water jets from any direction, suitable for outdoor, humid and dusty environments. For heavier duties such as washdown areas, IP56/IP65 options can be manufactured.

Evaluate in order: required power (kW) and speed, mounting arrangement (foot/flange), efficiency class, protection class (IP) and the operating environment. Special conditions such as frequent starts, high inertia or drive operation affect the choice. When in doubt, share your application details and we, as the manufacturer, will recommend the right model.

Power is chosen from the driven machine's shaft demand and starting load; speed from the rpm the machine needs. Common asynchronous speeds are 3000, 1500 and 1000 rpm (2-4-6 pole). An exaggerated safety margin wastes energy, while borderline sizing causes overheating. Tell us your application and we will pin down the right power-speed combination together.

The main causes of overheating are undersized motors, blocked ventilation, supply imbalance and overload. Select the correct power for the duty, keep the fan cover and cooling fins clean, and use thermal overload or PTC protection. On applications with frequent starts, a variable frequency drive also keeps winding temperature under control.

First make sure the motor matches the load; a motor running constantly at low load is inefficient. On variable-flow pump and fan duties a frequency drive cuts consumption substantially. Direct coupling instead of belt drives, regular maintenance and replacing old IE1-IE2 motors with IE3/IE4 units also deliver lasting efficiency gains.

Our motors are widely used in pump and booster sets, fan-ventilation systems, compressors, conveyor lines, crushing-screening plants, concrete batching plants, agricultural and food machinery, and recycling lines. With a manufacturing range from 0.55 kW to 355 kW we supply businesses of every scale, from small workshops to heavy industry.

AC motors run on alternating current, DC motors on direct current. Within the AC family, synchronous motors rotate exactly at line frequency and serve special applications, while asynchronous (induction) motors rotate with a small slip and are the industrial standard thanks to their simple, rugged construction. Our production focuses on three-phase asynchronous motors, which have the widest field of use.

Three-phase motors run on 380 V industrial supply, deliver balanced torque at higher powers and are the industry standard. Single-phase motors run on 220 V domestic supply and usually serve small pumps, compressors and workshop equipment up to about 2.2 kW. If your facility has a three-phase line, a three-phase motor of the same power will run more efficiently and last longer.

An asynchronous (induction) motor has no brushes or commutator on its rotor; this simple construction means few failures, easy maintenance and low cost. It can run direct-on-line or with a drive and withstands harsh environments. That is why it is the most widely used industrial motor type and the core of our production programme.

As the IE level defined in IEC 60034-30 rises, more of the energy a motor draws is converted into useful work. IE4 (super premium) and IE5 (ultra premium) motors cut losses noticeably compared with IE2-IE3 models. On motors running long hours daily, even a few percent of extra efficiency turns into substantial yearly savings, so the price difference typically pays for itself quickly.