COLZANI motor Germany COLZANI model COLZANI price

COLZANI motor is a commonly used AC motor. The synchronous motor is the heart of the power system; it is a component that integrates rotation and stationary states, electromagnetic changes and mechanical motion, to realize the conversion between electrical energy and mechanical energy. Its dynamic performance is very complex, and its dynamic performance has a great impact on the dynamic performance of the entire power system. The characteristic is: during steady-state operation, there is an invariant relationship between the rotor speed and the grid frequency: n=ns=60f/p, where f is the grid frequency, p is the number of pole pairs of the motor, and ns is called the synchronous speed. If the grid frequency remains unchanged, the speed of the synchronous motor is constant in steady state and independent of the load magnitude. Synchronous motors are divided into synchronous generators and synchronous motors. AC machines in modern power plants are mainly synchronous generators.

COLZANI motor applications

Motors are mainly used as electric motors. They are the most widely used and highest demand type of motor in industrial and agricultural production and various sectors of the national economy. Metal cutting machine tools, steel rolling equipment, blowers, crushers, water pumps, oil pumps, light industrial machinery, textile machinery, mining machinery, etc., mostly use asynchronous motors for drive. In daily life, the application of asynchronous motors is also increasingly widespread, such as in household appliances like electric fans, washing machines, refrigerators, and air conditioners, which all use single-phase asynchronous motors. In electric drives, the vast majority of drive motors are asynchronous motors, accounting for approximately 60% of the total grid load. The wide application of asynchronous motors is due to their advantages such as simple structure, ease of use, reliable operation, high efficiency, ease of manufacturing, and low cost. The speed regulation performance of asynchronous motors themselves is poor; in occasions requiring a wide and smooth speed regulation range, DC motors are generally used. In the past one or two decades, asynchronous motor AC speed control systems developed based on power electronic devices and microcomputers have improved the speed regulation performance of asynchronous motors, thus making their applications more extensive. During operation, asynchronous motors must absorb reactive power from the grid, which will worsen the power factor of the grid. Since the power factor of the grid can be compensated by other means, this does not hinder the widespread use of asynchronous motors.

COLZANI motor classification

Motor classification: 1. Classification by power supply: Based on the operating power supply, motors are divided into DC motors and AC motors. AC motors are further divided into single-phase motors and three-phase motors. 2. Classification by structure and operating principle: Motors are divided into DC motors, asynchronous motors, and synchronous motors based on their structure and operating principle. Synchronous motors are further divided into permanent magnet synchronous motors, reluctance synchronous motors, and hysteresis synchronous motors. Asynchronous motors are divided into induction motors and AC commutator motors. Induction motors are further divided into three-phase asynchronous motors, single-phase asynchronous motors, and shaded-pole asynchronous motors. AC commutator motors are further divided into single-phase series-wound motors, AC/DC universal motors, and repulsion motors. 3. Classification by starting and running mode: Motors are divided into capacitor-start single-phase asynchronous motors, capacitor-run single-phase asynchronous motors, capacitor-start-and-run single-phase asynchronous motors, and split-phase single-phase asynchronous motors based on their starting and running modes. 4. Classification by application: Motors are divided into drive motors and control motors based on their application. Drive motors are further divided into motors for power tools (including drilling, polishing, grinding, slotting, cutting, reaming, and other tools), motors for home appliances (including washing machines, electric fans, refrigerators, air conditioners, tape recorders, VCRs, DVD players, vacuum cleaners, cameras, hair dryers, electric shavers, etc.), and motors for other general small mechanical equipment (including various small machine tools, small machinery, medical devices, electronic instruments, etc.). Control motors are further divided into stepper motors and servo motors. 5. Classification by rotor structure: Motors are divided into squirrel-cage induction motors (referred to as squirrel-cage asynchronous motors in old standards) and wound-rotor induction motors (referred to as wound-rotor asynchronous motors in old standards) based on the rotor structure. 6. Classification by operating speed: Motors are divided into high-speed motors, low-speed motors, constant-speed motors, and variable-speed motors based on their operating speed. 7. Classification by protection type: Open type and enclosed type. The rotating parts and live parts inside the motor housing have necessary mechanical protection to prevent accidental contact, without significantly obstructing ventilation. Protected motors are further divided into the following types based on their ventilation and protection structures: mesh-covered type, drip-proof type, splash-proof type, enclosed type, waterproof type, watertight type, submersible type, and explosion-proof type.

COLZANI motor speed control

Motor speed control, the principle of speed control for wound-rotor induction motors realized using current-source PWM converters: the rotor electrical energy of the induction motor is converted from AC rotor energy to DC by an uncontrollable rectifier composed of a diode bridge rectifier, and then the current-source PWM converter converts the DC electrical energy into AC electrical energy with a frequency equal to the grid frequency, adjustable current amplitude, and adjustable phase. The converted electrical energy is fed back to the grid for cyclic use through an autotransformer. This speed control scheme has the following characteristics while achieving speed control: (1) The input-output ratio of the transformer can be fixed as needed, and electrical isolation between input and output is not required, so this scheme adopts an autotransformer, greatly saving transformer costs. (2) The AC side output current of the current-source PWM converter is a pulse current containing several harmonics. To ensure normal operation of the power system and make the energy fed back to the grid meet international harmonic standards, it is very necessary to take appropriate filtering measures at the connection point between the PWM converter and the grid. (3) The AC side output current of the current-source PWM converter is sinusoidal after filtering, and the phase angle is controllable, so adopting an appropriate control scheme can solve the harmonic and power factor problems of the speed control system while realizing motor speed control. It has obvious advantages compared with thyristor cascade speed control. ① AC voltage regulation speed control; ② Rotor series resistance AC speed control; ③ AC cascade speed control. A wound-rotor induction motor is an induction motor whose primary winding on the stator is connected to the power supply, and whose rotor has a multi-phase winding connected to slip rings. The three-phase symmetrical windings of the rotor can be connected in Y configuration or delta configuration. The characteristic of this rotor is that the rotor winding can be connected to external resistors to improve the starting performance of the motor or to adjust the speed.

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