DEUFRA motor Germany DEUFRA model DEUFRA price

DEUFRA motor is a discrete-value control motor that converts electrical pulse excitation signals into corresponding angular or linear displacement. This motor moves one step for each input electrical pulse, so it is also called a pulse motor. It is a micro special motor that converts electrical pulse signals into angular displacement to control rotor rotation. It serves as an actuator in automatic control devices. For each input pulse signal, the stepper motor advances one step, hence it is also known as a pulse motor. Stepper motors are widely used in peripheral equipment of digital computers, as well as in printers, plotters, and disk drives. The drive power supply for stepper motors consists of a variable-frequency pulse signal source, a pulse distributor, and a pulse amplifier, which provide pulse current to the motor windings. The operating performance of a stepper motor depends on the good coordination between the motor and the drive power supply. The advantages of stepper motors include no cumulative error, simple structure, convenient use and maintenance, low manufacturing cost, and high ability to drive load inertia. They are suitable for small and medium-sized machine tools and applications with low speed and precision requirements. The disadvantages include lower efficiency, significant heat generation, and occasional "step loss".

DEUFRA motor braking methods

The motor is an AC motor with brushes and a commutator. Some series-wound motors can be powered by either AC or DC, and are called AC/DC universal motors. They are named for their field winding and armature winding connected in series. The structure of a single-phase series-wound motor is very similar to that of a DC series-wound motor. The main difference is that the stator core of a single-phase series-wound motor must be laminated from silicon steel sheets, while the poles of a DC motor can be either laminated or made as a solid structure. The principle of generating rotating torque in a single-phase AC series-wound motor is similar to that of a DC series-wound motor and can be explained using the operating principle of DC motors. The stator winding and armature winding of a single-phase series-wound motor are connected in series. The direction of rotation of a series-wound motor depends on the direction of electromagnetic torque and current. Therefore, when operating on an AC power supply, as the polarity alternates, the polarity of the stator magnetic field and the direction of the rotor current (or its generated magnetic field) change simultaneously. According to the left-hand rule, the direction of the electromagnetic force remains unchanged, so the series-wound motor maintains a constant direction of rotation. When powered with forward polarity, the electromagnetic torque is counterclockwise. If the positive and negative poles of the power supply are swapped, both the excitation flux and the armature current direction change simultaneously, but the electromagnetic torque direction remains counterclockwise. Thus, the motor's direction of rotation does not change, meaning the electromagnetic torque and rotation direction of a single-phase AC series-wound motor do not vary with changes in power supply polarity.

DEUFRA motor fault handling

Motor measurement terminals. (1) First, identify the two ends (start and finish) of each of the three-phase windings. Set the multimeter to the resistance range for measurement. Coils belonging to the same phase are connected and show no resistance, while coils not belonging to the same phase are not conductive. Therefore, the multimeter can be used to determine which two wire ends belong to the same phase winding leads. (2) To identify the like-polarity ends of the lead wires from two windings, set the analog multimeter to the DC current range with the smallest scale. Connect the two wire ends of any one phase winding to the multimeter probes. Then, briefly touch the two wire ends of another phase winding to the positive and negative terminals of a dry cell battery. At the moment the battery is connected to the coil, if the meter needle deflects toward the greater-than-zero side (i.e., clockwise), the battery positive terminal and the black probe of the multimeter are like-polarity ends; otherwise, they are opposite. Daily maintenance content for continuously operating three-phase asynchronous motors: visual inspection; check whether the fan is working properly; check for abnormal vibration; verify whether the coupling connection is reliable; ensure the base mounting is secure; check whether the bearings are working properly (by listening to the sound); check whether the temperature is normal (using an infrared thermometer); regularly inspect wire connections and switch contacts; check whether the operating current is normal (using a clamp-on ammeter). Additionally, wound-rotor motors require inspection of the carbon brushes and slip rings.

DEUFRA motor performance

The performance of a motor is closely related to its excitation method. Typically, there are 4 types of excitation methods for DC motors: separately excited DC motor, shunt-excited DC motor, series-excited DC motor, and compound-excited DC motor. Understand the characteristics of each of the 4 methods: 1. Separately excited DC motor: The field winding has no electrical connection with the armature. The excitation circuit is supplied by a separate DC power source. Therefore, the excitation current is not affected by the armature terminal voltage or armature current. 2. Shunt-excited DC motor: The circuit is parallel-connected for current division. The voltage across the shunt winding is the same as the voltage across the armature. However, the shunt winding is wound with thin wire and has many turns, resulting in high resistance, which keeps the excitation current low. 3. Series-excited DC motor: The current is series-connected for voltage division. The field winding is connected in series with the armature, so the internal magnetic field of this motor changes significantly with changes in armature current. To avoid large losses and voltage drops in the field winding, its resistance should be as low as possible. Therefore, series-excited DC motors are usually wound with thicker wire and have fewer turns. 4. Compound-excited DC motor: The motor's magnetic flux is generated by the excitation currents in two windings.

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