Gunda motor Germany Gunda model Gunda price

Gunda motor refers to a motor that can operate on both DC and AC power supplies. This type of electric motor is widely used in household appliances, manual devices, computing tools, and precision machinery. In addition, this type of motor is frequently used in medical equipment, communication technology, measurement technology, the film industry, and many other fields.

Gunda motor classification

Motors are divided into two types: reactive and Sawyer-type. The Sawyer-type linear stepper motor consists of a stationary part (called the reaction plate) and a moving part (called the mover). The reaction plate is made of soft magnetic material, with teeth and slots evenly machined on its surface. The motor's mover consists of permanent magnets and two coil-wound magnetic poles A and B. The mover is supported by an air cushion to eliminate mechanical friction during movement, ensuring smooth motor operation and improving positioning accuracy. The maximum travel speed of this motor can reach 1.5 m/s, acceleration can reach 2g, and positioning accuracy can reach over 20 micrometers. Two Sawyer-type linear stepper motors assembled perpendicular to each other form a planar motor. By applying different combinations of control currents to the motors in the x direction and y direction (Figure 3), the motor can move along any geometric trajectory within the plane. Large-scale automatic plotters are new devices that combine computers with planar motors. Planar motors can also be used in laser cutting systems, with control accuracy and resolution reaching tens of micrometers.

Gunda motor maintenance methods

When the no-load current of the motor exceeds the limit data, it indicates that the motor has failed. Causes of high no-load current include excessive internal mechanical friction, partial short circuits in the coils, and demagnetization of the magnetic steel. We continue with further tests and inspections to determine the cause or location of the fault. When the no-load/load speed ratio of the motor is greater than 1.5, turn on the power and rotate the throttle to make the motor run at high speed under no-load for more than 10s. After the motor speed stabilizes, measure the maximum no-load speed N1 of the motor at this time. Under standard test conditions, after traveling a distance of more than 200m, begin measuring the maximum load speed N2 of the motor. No-load/load speed ratio = N2 ÷ N1. When the no-load/load speed ratio of the motor is greater than 1.5, it indicates that the demagnetization of the motor's magnetic steel is quite severe, and the entire set of magnetic steel inside the motor should be replaced; in actual electric vehicle maintenance, the entire motor is generally replaced. The direct cause of motor heating is high current. The relationship between motor current I, motor input electromotive force E1, induced electromotive force during rotation (also called back EMF) E2, and motor coil resistance R is: I = (E1-E2) ÷ R. An increase in I indicates that R has decreased or E2 has reduced. A decrease in R is generally caused by short circuits or open circuits in the coils, while a reduction in E2 is generally caused by demagnetization of the magnetic steel or short/open circuits in the coils. In the practice of maintaining complete electric vehicles, the method for dealing with motor heating faults is generally to replace the motor. Whether high-speed or low-speed, motors should not exhibit mechanical collisions or discontinuous, irregular mechanical noise during loaded operation. Different types of motors can be repaired using different methods. The causes of short driving range and lack of power in the motor (commonly known as weak motor) are relatively complex. However, after excluding the above 4 types of motor faults, generally speaking, the fault of short driving range is not caused by the motor, but is related to battery capacity attenuation, the charger not fully charging the battery, controller parameter drift (PWM signal not reaching 100%), etc. Phase loss in brushless motors is generally caused by damage to the Hall elements of the brushless motor. We can determine which Hall element has failed by measuring the resistance of the Hall element output leads relative to the Hall ground and Hall power supply leads, using a comparison method. To ensure precise commutation position of the motor, it is generally recommended to replace all three Hall elements simultaneously. Before replacing the Hall elements, it is necessary to clarify whether the electrical angle of the motor phase is 120° or 60°. Generally, for motors with 60° phase angle, the three Hall elements are arranged in parallel. For motors with 120° phase angle, the middle Hall element among the three is arranged in a flipped 180° position.

Gunda motor classification

The excitation method of a motor refers to how the field winding is supplied with power to generate magnetomotive force and establish the main magnetic field. According to different excitation methods, DC motors can be divided into the following types: 1. Separately excited DC motor: A DC motor where the field winding has no connection with the armature winding and is supplied by another DC power source is called a separately excited DC motor. Permanent magnet DC motors can also be regarded as separately excited DC motors. 2. Shunt-excited DC motor: In a shunt-excited DC motor, the field winding is connected in parallel with the armature winding. As a shunt generator, the terminal voltage generated by the motor itself supplies the field winding; as a shunt motor, the field winding and armature share the same power source, and its performance is identical to that of a separately excited DC motor. 3. Series-excited DC motor: In a series-excited DC motor, the field winding is connected in series with the armature winding, and then connected to the DC power supply. The excitation current of this DC motor is the armature current. 4. Compound-excited DC motor: A compound-excited DC motor has two field windings: shunt and series. If the magnetomotive force generated by the series winding is in the same direction as that generated by the shunt winding, it is called cumulative compounding. If the directions of the two magnetomotive forces are opposite, it is called differential compounding. DC motors with different excitation methods have different characteristics. Generally, the main excitation methods for DC motors are shunt, series, and compound excitation, while the main excitation methods for DC generators are separate, shunt, and compound excitation.

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