Chemnitzer Zahnradfabrik motor, Germany Chemnitzer Zahnradfabrik model, Chemnitzer Zahnradfabrik price

Chemnitzer Zahnradfabrik motors are permanent magnet motors controlled by electronic circuit commutation or current control. Permanent magnet brushless motors come in two types: sine wave drive and square wave drive. Those with rectangular wave drive current are commonly referred to as permanent magnet brushless DC motors, while those with sine wave drive current are commonly referred to as permanent magnet AC servo motors. Based on sensor type, they can be classified into sensor-equipped motors and sensorless motors.

Chemnitzer Zahnradfabrik motor mechanical characteristics

Motor features include low moment of inertia, low starting voltage, and low no-load current. By eliminating the contact commutation system, the motor speed is significantly increased, with a maximum speed of up to 100 000rpm. Brushless servo motors can achieve control of speed, position, torque, etc., without an encoder during servo control. There is no brush wear, offering advantages such as long life, low noise, and no electromagnetic interference, in addition to high speed. Features of DC brushed servo motors: 1. Compact size, fast action and response, high overload capacity, and wide speed regulation range. 2. High torque at low speed, low fluctuation, and smooth operation. 3. Low noise and high efficiency. 4. Rear encoder feedback (optional) forms a DC servo system, among other advantages. 5. Wide voltage transformation range and adjustable frequency. DC servo motors can be applied in spark erosion machines, robotic arms, precision machinery, etc. They can be configured with 2500P/R high-resolution standard encoders and tachometers, and can be additionally equipped with gearboxes, bringing reliable accuracy and high torque to mechanical equipment. Good speed regulation, highest output power per unit weight and volume, greater than AC motors, and far exceeding stepper motors. Multi-stage structure ensures low torque fluctuation. Servo motors are used in closed loops. This means they continuously send signals to the system and correct their operation based on signals from the system. Servo motors can also be controlled by microcontrollers.

Chemnitzer Zahnradfabrik motor classification

The rotor of the motor is designed with salient poles. The field coils mounted on the magnetic pole cores are connected in series, arranged with alternating opposite polarities, and have two lead wires connected to two slip rings mounted on the shaft. The field coils are excited by a small DC generator or a battery. In most synchronous motors, the DC generator is mounted on the motor shaft to supply the excitation current to the rotor pole coils. Since this type of synchronous motor cannot start automatically, a squirrel-cage winding is installed on the rotor for starting purposes. The squirrel-cage winding is placed around the rotor, with a structure similar to that of an asynchronous motor. When three-phase AC power is applied to the stator windings, a rotating magnetic field is generated within the motor. The squirrel-cage winding cuts the magnetic flux lines, generating induced current, which causes the motor to rotate. After the motor starts rotating, its speed gradually increases to slightly below the speed of the rotating magnetic field. At this point, the rotor field coils are excited by DC current, forming specific magnetic poles on the rotor. These poles attempt to track the rotating magnetic poles on the stator, thereby increasing the rotor speed until it rotates synchronously with the rotating magnetic field.

Chemnitzer Zahnradfabrik motor applications

Motors are primarily used in digital control systems, offering high precision and reliable operation. When position detection and speed feedback are employed, closed-loop control can also be achieved. Stepper motors have been widely applied in digital control systems, such as in digital-to-analog conversion devices, CNC machine tools, computer peripheral equipment, automatic recorders, and clocks. They are also used in industrial automation production lines and printing equipment. A stepper motor is an open-loop control element that converts electrical pulse signals into angular or linear displacement. Under non-overload conditions, the motor's speed and stopping position depend solely on the frequency and number of pulse signals, unaffected by load variations. That is, each pulse signal causes the motor to rotate by one step angle. The existence of this linear relationship, combined with the fact that stepper motors exhibit only periodic errors without cumulative error, makes using stepper motors for speed and position control very straightforward. Although stepper motors are widely used, they cannot be operated under conventional conditions like standard DC or AC motors. They require a control system composed of dual-ring pulse signals and power drive circuits to function. Therefore, effectively utilizing stepper motors is not easy, as it involves extensive professional knowledge in mechanics, electrical engineering, electronics, and computing. Nowadays, while there are indeed many manufacturers producing stepper motors, very few have specialized technical personnel capable of independent development and research. Most manufacturers employ only ten to twenty people and lack even the most basic equipment, operating merely at a stage of blind imitation. This causes considerable trouble for users in product selection and application. In view of the above, we have decided to take the widely used variable-reluctance stepper motor as an example to describe its basic working principles, hoping to assist a broad range of users in product selection, application, and overall machine improvement.

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