Ask which motor type appears most often in industry and the answer is usually the asynchronous motor. Running on alternating current (AC), these motors have no brushes or commutator; that simple construction makes them a low-failure, easy-to-maintain workhorse. At HEM Motor we manufacture asynchronous motors in our own facility and deliver from stock, offering both single-phase and three-phase models across a wide power and speed range.
The operating principle is simple yet robust: the rotating magnetic field in the stator induces current in the rotor and torque is born. Because the rotor turns slightly slower than this field, the resulting gap is called slip; near full load this is about 4% in our motors. Built with IP55 protection and Class F insulation, they suit speed and torque control via an inverter.
With the right protection relay and thermal setting, an asynchronous motor serves trouble-free for many years. If you seek higher efficiency, see our IE4 and IE5 series. For model selection at the right power and speed, current stock and a quote, call +90 (532) 345 49 86 or reach us via our contact page.
When you run a new asynchronous motor for the first time, especially while it turns at no load, you may hear a thin, high-pitched whine. Many users mistake this sound for a sign of... More Details
One of the most critical components that determines the efficiency of an asynchronous motor, its starting behavior, and which IE class it can reach is the often overlooked squirrel... More Details
When buying an asynchronous motor, people usually look at power, speed and efficiency class; yet there is one more dimension that quietly defines the motor's character: the air gap... More Details
When choosing an asynchronous motor to drive a high-inertia load, there is one parameter most purchasing decisions overlook: the load moment of inertia J (kgm²). A large fan impell... More Details
The efficiency value (%) written on the nameplate of an asynchronous motor shows the best point reached at full load. But in real plants motors rarely run at full load; most of the... More Details
The power stated on an asynchronous motor's nameplate assumes a balanced (symmetrical) three-phase supply. In a real grid, however, the voltages of the three phases are often not e... More Details
The most reliable way to know whether an asynchronous motor can drive a load correctly is to read the motor's speed-torque (M-n) curve. This curve shows how much torque the motor p... More Details
At the top of the causes of burnout in three-phase asynchronous motors is an insidious fault that often develops unnoticed: single phasing (phase loss). The interruption of one of ... More Details
Star-delta starting is one of the most common methods for reducing starting current in medium and large asynchronous motors. However, the success of this method often depends on a ... More Details
When selecting an asynchronous motor, most people look only at its power and speed; yet how often the motor stops and starts is a criterion at least as decisive as power. At every ... More Details
The frequency drive (VFD) is the most common way to adjust the speed of an asynchronous motor, and it delivers major energy savings in applications such as pumps, fans and conveyor... More Details
When you disconnect an asynchronous motor from the mains, it does not stop instantly. The rotor and the load attached to it keep turning because of the kinetic energy they carry. A... More Details
When you start an asynchronous motor for the first time, the motor draws, for a brief moment, a current far above the rated current. This high initial current is called the startin... More Details
When buying an asynchronous motor, most businesses carefully study the power (kW) and efficiency class (IE3/IE4) but overlook the "cos phi" value on the nameplate. Yet the power fa... More Details
When buying an asynchronous motor, the labels "insulation class: F" and "temperature rise: B (80K)" on the nameplate tell you far more than the rated power figure. These two values... More Details
The cylindrical capacitor you see when you open the black box of a single-phase motor is really the heart of that motor. A single-phase supply needs this capacitor for the motor to... More Details
The asynchronous motor is the most widely used drive element in industry, and most of its reliability depends on a part almost no user ever sees: the squirrel-cage rotor. When the ... More Details
OSB, MDF and chipboard production and wood drying kilns are demanding industrial environments where high temperature, fine dust and continuous operation come together. In these pla... More Details
In high-power facilities, electric motor selection is not limited to kW alone; the voltage selection is at least as decisive as the power. A 690V asynchronous motor offers a seriou... More Details
Most motors in industry run at 2 and 4 poles at high and medium speed; however, some applications demand low speed and high torque. This is exactly where 6-pole (about 1000 rpm) an... More Details
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