zurrer motor Germany zurrer model zurrer price

zurrer 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 include no cumulative error, simple structure, easy 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".

zurrer motor classification

The motor drive current is purely AC; brushless DC motors can be divided into brushless speed motors and brushless torque motors. Generally, there are two types of drive currents for brushless motors: one is trapezoidal wave (usually "square wave"), and the other is sine wave. Sometimes the former is called a DC brushless motor, and the latter is called an AC servo motor, strictly speaking, a type of AC servo motor. To reduce rotational inertia, brushless DC motors usually adopt a "slender" structure. Brushless DC motors are much smaller in weight and volume than brushed DC motors, and the corresponding rotational inertia can be reduced by about 40%—50%. Due to processing issues with permanent magnet materials, the general capacity of brushless DC motors is below 100kW. This type of motor has good linearity in mechanical and regulation characteristics, wide speed regulation range, long life, convenient maintenance, and low noise, without the series of problems caused by brushes, so it has great application potential in control systems. The stator windings of the motor are mostly made into three-phase symmetrical star connections, very similar to three-phase asynchronous motors. The rotor of the motor is bonded with magnetized permanent magnets. To detect the polarity of the motor rotor, position sensors are installed inside the motor. The driver consists of power electronic devices and integrated circuits, etc., with functions including: receiving start, stop, and brake signals of the motor to control its start, stop, and braking; receiving position sensor signals and forward/reverse signals to control the on/off of each power tube in the inverter bridge to generate continuous torque; receiving speed commands and speed feedback signals to control and adjust the speed; providing protection and display, etc. Since brushless DC motors operate in a self-controlled manner, they do not require additional starting windings on the rotor like synchronous motors under heavy load start with variable frequency speed regulation, nor do they produce oscillation and step loss during sudden load changes. The permanent magnets of small and medium capacity brushless DC motors mostly use rare earth neodymium iron boron (Nd-Fe-B) materials with high magnetic energy product. Therefore, the volume of rare earth permanent magnet brushless motors is reduced by one frame size compared to three-phase asynchronous motors of the same capacity. Research on variable frequency speed regulation of asynchronous motors over the past thirty years has ultimately been seeking methods to control asynchronous motor torque. Rare earth permanent magnet brushless DC motors will surely show advantages in the field of speed regulation due to their wide speed regulation, small volume, high efficiency, and small steady-state speed error. Because brushless DC motors have the characteristics of DC brushed motors and are also frequency-changing devices, they are also known as DC variable frequency, with the international generic term being BLDC. The operating efficiency, low-speed torque, and speed precision of brushless DC motors are better than any variable frequency drive with other control technologies, making them worthy of industry attention. This product has been produced exceeding 55kW, and can be designed up to 400kW, meeting the industry's needs for energy saving and high-performance drive.

zurrer motor performance

Although the working principle of the motor is similar to that of split-phase single-phase asynchronous motors, the former has a much larger rotor resistance than the latter. Therefore, compared with single-unit asynchronous motors, servo motors have three significant characteristics: 1, large starting torque. Due to the large rotor resistance, there is a clear difference compared to the torque characteristic curve of ordinary asynchronous motors. It allows the critical slip ratio S0>1, which not only makes the torque characteristic (mechanical characteristic) closer to linear but also provides a larger starting torque. Therefore, when the stator has control voltage, the rotor rotates immediately, featuring fast start and high sensitivity. 2, wide operating range, 3, no self-rotation phenomenon. For a normally operating servo motor, as soon as the control voltage is lost, the motor stops immediately. When the servo motor loses control voltage, it is in a single-phase operating state. Due to the large rotor resistance, the two torque characteristics generated by the interaction of the two rotating magnetic fields in opposite directions in the stator with the rotor (T1－S1, T2－S2 curves) and the synthetic torque characteristic (T－S curve). The output power of AC servo motors is generally 0.1-100W. When the power frequency is 50Hz, voltages include 36V, 110V, 220, 380V; when the power frequency is 400Hz, voltages include 20V, 26V, 36V, 115V, and others. AC servo motors run smoothly with low noise. However, the control characteristic is nonlinear, and due to large rotor resistance, high losses, and low efficiency, they are larger in volume and heavier in weight compared to DC servo motors of the same capacity, so they are only suitable for small power control systems of 0.5-100W.

zurrer motor applications

The motor stator generates a stationary magnetic field. This stationary magnetic field surrounds the armature (or rotor). An external power source excites the armature magnetic field. On the shaft of a DC brushed motor, there are also two arc-shaped copper pieces called commutator segments. When the motor rotates, carbon brushes slide on the commutator. This generates a rotating magnetic field that attracts the stationary magnetic field of the stator. The current in the armature and stator windings is supplied by batteries or other DC power sources (permanent magnet DC brushed motors do not have stator windings). The battery (or DC power source) provides a constant DC voltage. The voltage amplitude determines the motor speed, so the battery or DC power source is a linear excitation source. The most effective way to change the speed of a DC brushed motor is to use pulse width modulation (pwm) technology. pwm technology switches a constant voltage source at a fixed frequency. Changing the pulse width of the pwm signal can adjust the motor speed. The ratio between the high and low levels of the pulse is called the duty cycle of the pwm signal. The amplitude of the DC battery level is equal to the average amplitude of the pwm signal. DC brushed motors have good starting and speed regulation performance and are often applied in occasions with high requirements for starting and speed regulation, such as large reversible rolling mills, mine hoists, high-speed elevators in hotels, gantry planers, electric locomotives, internal combustion locomotives, city trams, subway trains, electric bicycles, papermaking and printing machinery, ship machinery, large precision machine tools, and large cranes.

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