hoyer motor Germany hoyer model hoyer price

hoyer motors are a type of motor that changes speed by altering the number of magnetic pole pairs, voltage, current, frequency, and other parameters to achieve higher performance. Due to their excellent performance, adjustable-speed motors are widely used in industries such as steel, power plants, cables, chemicals, petroleum, cement, textiles, printing and dyeing, papermaking, and machinery for stepless speed control of loads with constant torque or decreasing torque. They are particularly suitable for driving pumps and fans with significant flow variations, achieving good energy-saving results.

hoyer motor advantages

The motor consists of the motor body and the driver, representing a typical mechatronic product. The stator windings of the motor are mostly configured in a three-phase symmetrical star connection, very similar to three-phase asynchronous motors. Permanent magnets that have been magnetized are attached to the rotor of the motor. To detect the polarity of the motor rotor, position sensors are installed inside the motor. The driver is composed of power electronic devices and integrated circuits, among others. Its functions include: receiving start, stop, and brake signals from the motor to control starting, stopping, and braking; receiving signals from position sensors and forward/reverse rotation signals to control the switching of power transistors in the inverter bridge, generating continuous torque; receiving speed commands and speed feedback signals to control and adjust rotational speed; and providing protection and display functions.

hoyer motor applications

Variable frequency speed control for motors has become the mainstream speed regulation solution and can be widely applied to stepless speed transmission across various industries. Particularly with the increasingly widespread application of variable frequency drives (VFDs) in industrial control, the use of variable frequency motors has also grown. It can be said that due to the superiority of variable frequency motors over standard motors in variable frequency control, wherever VFDs are used, variable frequency motors are commonly seen. The social benefits of domestically produced high-voltage variable frequency devices are significant, mainly including energy saving, thereby conserving resources and reducing environmental pollution. They eliminate startup shocks to the motor and impacts on the power grid, reducing failure rates of motors and equipment. They improve control precision and automation levels. The economic benefits of variable frequency speed control are also very significant. For pumps and fans, fluid flow is proportional to the first power of speed, torque is proportional to the square of speed, and power is proportional to the cube of speed. As speed decreases, motor power consumption drops by the cube, making the energy-saving effect of variable frequency speed control very pronounced. If flow rate decreases, speed decreases, head decreases, and motor power consumption decreases, theoretically saving energy. If air dampers or valves were originally used for regulation, a decrease in flow rate leads to an increase in head and a reduction in motor power; thus, variable frequency speed control saves more energy than damper or valve regulation. In addition to energy efficiency improvements, there are indirect economic benefits for different loads, mainly including improved power factor, realization of soft starts, reduced electrical and mechanical damage to the motor from starting torque, and smooth, stable, and high-precision control.

hoyer motor working principle

A DC motor converts direct current electrical energy into mechanical energy. It is widely used in electric drives due to its good speed regulation performance. DC motors are classified into 3 types based on excitation method: permanent magnet, separately excited, and self-excited. Among these, self-excited motors are further divided into 3 types: shunt-wound, series-wound, and compound-wound. When DC power supplies current to the armature winding through brushes, conductors under the N pole on the armature surface carry current in the same direction. According to the left-hand rule, these conductors experience a counter-clockwise torque. Similarly, part of the conductors under the S pole on the armature surface also carry current in the same direction and, according to the left-hand rule, experience a counter-clockwise torque. Thus, the entire armature winding, i.e., the rotor, rotates counter-clockwise, converting input DC electrical energy into mechanical energy output at the rotor shaft. The motor consists of a stator and a rotor. Stator components include the base, main magnetic poles, commutating poles, and brush assembly. Rotor (armature) components include the armature core, armature winding, commutator, shaft, and fan.

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