Carl Rehfuss motor, Germany Carl Rehfuss model, Carl Rehfuss price

Carl Rehfuss 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".

Carl Rehfuss motor classification

Motors are classified by the supply method of excitation current. Permanent magnet synchronous motors are synchronous motors that use permanent magnets to establish the excitation magnetic field; the stator generates a rotating magnetic field, and the rotor is made of permanent magnet material. Synchronous motors require a DC magnetic field for energy conversion; the DC current producing this field is called the motor's excitation current. Separately excited motors obtain excitation current from another power source. Self-excited motors obtain excitation current from the motor itself. Classified by supply frequency, permanent magnet brushless motors include two types: permanent magnet brushless DC motors and permanent magnet brushless AC motors. Both require variable-frequency power supply when operating as motors. The former requires a square-wave inverter, while the latter requires a sine-wave inverter. Classified by air-gap magnetic field distribution: Sine-wave permanent magnet synchronous motors use permanent magnet materials for poles; when three-phase sine-wave current is input, the air-gap magnetic field distributes according to a sine law, abbreviated as permanent magnet synchronous motor. Trapezoidal-wave permanent magnet synchronous motors also use permanent magnet materials for poles, but input square-wave current, resulting in a trapezoidal distribution of the air-gap magnetic field, with performance closer to DC motors. Self-controlled variable-frequency synchronous motors constructed with trapezoidal-wave permanent magnet synchronous motors are also called brushless DC motors.

Carl Rehfuss motor classification

The vibration of the vibrating body is generated by two excitation systems, and its vibration form is called composite vibration. Generally, there are two forms: dual-frequency composite and dual-amplitude composite. Certain special-performance vibrating screening equipment uses two vibrating motors of different models and speeds, installed at the feed end and discharge end of the screening machinery, respectively. This causes large-amplitude, low-frequency vibration at the feed end and small-amplitude, high-frequency vibration at the discharge end. The middle section of the screening machinery overlaps these two vibrations, enabling more effective screening. When the projection of the vibration trajectory of the vibrating body on the horizontal plane is a circle or ellipse, the vibration form is called rotary vibration. Rotary vibration can be divided into three forms: planar rotary vibration, vortex rotary vibration, and complex rotary vibration. When the projection of the vibration trajectory on the vertical plane is a horizontal straight line, the vibration form is called planar rotary vibration; when the projection is an inclined straight line, it is called vortex rotary vibration; when the projection is a circle or ellipse, it is called complex rotary vibration. Vibrating machinery excited by vertical vibrating motors usually produces rotary vibration, the specific form of which depends on the angle between the excitation blocks at both ends of the vertical vibrating motor. Alternatively, two horizontal vibrating motors can be installed on both sides of the vibrating equipment with their shafts set at a specified angle, causing the vibrating machinery to produce rotary vibration.

Carl Rehfuss motor performance

Since the 20s and 80s, with the development of integrated circuits, power electronics technology, and AC variable-speed drive technology, permanent magnet AC servo drive technology has seen prominent development. Famous electrical manufacturers worldwide have successively launched their own series of AC servo motors and servo drives, continuously improving and updating them. AC servo systems have become the main development direction of contemporary high-performance servo systems, putting traditional DC servo systems at risk of being eliminated. After the 90s, AC servo systems commercialized worldwide adopted full-digital control sine-wave motor servo drives. The development of AC servo drive devices in the transmission field is advancing rapidly. Compared with DC servo motors, the main advantages of permanent magnet AC servo motors are: 1. No brushes or commutators, resulting in reliable operation and low maintenance requirements. 2. Convenient heat dissipation for stator windings. 3. Low inertia, making it easy to improve system responsiveness. 4. Suitable for high-speed, high-torque operating conditions. 5. Smaller volume and weight for the same power rating.

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