maxon motor motor Germany maxon motor model maxon motor price

maxon motor 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 of a stepper motor 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 are 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 are lower efficiency, significant heat generation, and occasional "step loss".

maxon motor motor braking methods

Regarding motor braking, users often confuse the functions of electromagnetic braking, regenerative braking, and dynamic braking, leading to the selection of incorrect accessories. A dynamic brake consists of a dynamic braking resistor and shortens the mechanical feed distance of the servo motor through energy consumption braking during faults, emergency stops, or power failures. Regenerative braking refers to the process where the servo motor feeds the energy generated during braking back to the DC bus through an inverter circuit during deceleration or stopping, where it is absorbed by a resistive-capacitive circuit. Electromagnetic braking locks the motor shaft via a mechanical device. Differences among the three: (1) Regenerative braking only works when the servo drive is functioning normally; it cannot brake the motor during faults, emergency stops, or power failures. Dynamic brakes and electromagnetic brakes do not require power to operate. (2) Regenerative braking operates automatically by the system, whereas dynamic brakes and electromagnetic brakes require external relay control. (3) Electromagnetic braking is generally activated after SV and OFF; otherwise, it may cause amplifier overload. Dynamic braking is generally activated after SV, OFF, or main circuit power-off; otherwise, it may cause overheating of the dynamic braking resistor.

maxon motor motor structure

The motor rotor consists of the rotor core, rotor winding, and shaft. The rotor core is also part of the motor's magnetic circuit and is made of stacked silicon steel sheets. Unlike the stator core laminations, the rotor core laminations have slots on the outer circumference. After stacking, the outer cylindrical surface of the rotor core uniformly forms many slots of the same shape to house the rotor winding. The rotor winding is another part of the induction motor circuit; its function is to cut the stator magnetic field, generate induced electromotive force and current, and rotate the rotor under the action of the magnetic field. Its structure can be divided into two types: squirrel-cage winding and wound rotor winding. The main characteristics of these two rotors are: squirrel-cage rotors have a simple structure, are easy to manufacture, economical, and durable; wound rotors have a complex structure and are expensive, but external resistance can be introduced into the rotor circuit to improve starting and speed regulation performance. The squirrel-cage rotor winding consists of conductive bars placed in the rotor slots and end rings at both ends. To save steel and increase production efficiency, the conductive bars and end rings of low-power induction motors are usually cast in one piece from molten aluminum. For high-power motors, since the quality of cast aluminum is difficult to guarantee, copper bars are often inserted into the rotor core slots, and end rings are welded at both ends. The squirrel-cage rotor winding is self-closed and does not require an external power supply. Its shape resembles a cage, hence the name squirrel-cage rotor.

maxon motor motor structure

The motor armature core is the main part of the main magnetic circuit and is used to embed the armature winding. Generally, the armature core is made by stacking laminations punched from silicon steel sheets of 0.5mm thickness to reduce eddy current loss and hysteresis loss in the armature core during motor operation. The stacked core is fixed on the shaft or rotor bracket. Armature slots are opened on the outer circumference of the core, and the armature winding is embedded in the slots. The function of the armature winding is to generate electromagnetic torque and induced electromotive force. It is the key component for energy conversion in DC motors, hence the name armature. It is composed of many coils (hereinafter referred to as elements) connected according to certain rules. The coils are wound with high-strength enamel-covered wire or glass-fiber-covered flat copper wire. The coil sides of different coils are embedded in the armature slots in upper and lower layers. Proper insulation must be ensured between the coils and the core, as well as between the upper and lower layers of coil sides. To prevent centrifugal force from throwing the coil sides out of the slots, the slot openings are secured with slot wedges. The end connections of the coils extending out of the slots are bound with thermosetting non-woven glass tape. In DC motors, the commutator paired with brushes converts the external DC power supply into alternating current in the armature coils, keeping the direction of electromagnetic torque constant. In DC generators, the commutator paired with brushes converts the alternating electromotive force induced in the armature coils into direct electromotive force drawn from the positive and negative brushes. The commutator is a cylinder composed of many commutator segments insulated from each other by mica sheets. The shaft supports the rotation of the rotor and requires certain mechanical strength and rigidity; it is generally machined from round steel.

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