zama motor Germany zama model zama price

zama motor is an AC motor that generates electromagnetic torque through the interaction between the rotating magnetic field in the air gap and the induced current in the rotor winding, thereby converting electrical energy into mechanical energy. Three-phase asynchronous motors are mainly used as motors to drive various production machinery, such as: fans, pumps, compressors, machine tools, light industry and mining machinery, threshers and crushers in agricultural production, processing machinery for agricultural products, etc. Simple structure, easy manufacturing, low price, reliable operation, robust and durable, high operating efficiency and suitable working characteristics.

zama motor speed control

The motor consists of three parts: a squirrel-cage motor, an electromagnetic slip clutch, and a DC excitation power supply (controller). The DC excitation power supply has low power and is usually composed of a single-phase half-wave or full-wave thyristor rectifier. Changing the conduction angle of the thyristor can change the magnitude of the excitation current. The electromagnetic slip clutch consists of three parts: an armature, magnetic poles, and an excitation winding. The armature and the latter have no mechanical connection and can rotate freely. The armature is coaxially connected to the motor rotor, called the active part, driven by the motor; the magnetic poles are connected to the load shaft via a coupling, called the driven part. When both the armature and the magnetic poles are stationary, if DC current is applied to the excitation winding, several pairs of N and S alternating polarity magnetic poles will form along the circumference of the air gap, and their magnetic flux passes through the armature. When the armature rotates with the driving motor, due to the relative motion between the armature and the magnetic poles, eddy currents are induced in the armature. These eddy currents interact with the magnetic flux to generate torque, driving the rotor with magnetic poles to rotate in the same direction, but its speed is always lower than the armature speed N1. This is a slip speed control method. By changing the DC excitation current of the slip clutch, the output torque and speed of the clutch can be changed. A hydraulic coupling is a hydraulic transmission device, generally consisting of a pump wheel and a turbine, collectively referred to as working wheels, placed in a sealed housing. A certain amount of working fluid is filled in the housing. When the pump wheel rotates under the drive of the prime mover, the fluid inside is pushed by the blades to rotate. Under the action of centrifugal force, it enters the turbine along the outer ring of the pump wheel, giving thrust to the turbine blades in the same rotation direction, thereby driving the production machinery to operate. The power transmission capacity of the hydraulic coupling is consistent with the relative amount of fluid filling in the housing. During operation, changing the filling rate can change the turbine speed of the coupling, achieving stepless speed control.

zama motor structure

Motor control structure. Brushless DC motor is a type of synchronous motor, which means that the rotor speed of the motor is affected by the speed of the stator's rotating magnetic field and the number of rotor poles (P). N = 120 · f / P. With a fixed number of rotor poles, changing the frequency of the stator's rotating magnetic field can change the rotor speed. A brushless DC motor adds electronic control (driver) to a synchronous motor, controlling the frequency of the stator's rotating magnetic field and feeding back the motor rotor speed to the control center for repeated correction, aiming to achieve characteristics close to those of a DC motor. That is, a brushless DC motor can maintain a certain rotor speed within the rated load range even when the load changes. The brushless DC driver includes a power section and a control section: the power section provides three-phase power to the motor, and the control section converts the input power frequency as required. The power section can accept direct DC input (generally 24V) or AC input (110V/220 V). If the input is AC, it must first be converted to DC by a converter (converter). Whether the input is DC or AC, before entering the motor coils, the DC voltage must be converted by an inverter (inverter) into 3-phase voltage to drive the motor. The inverter (inverter) generally consists of 6 power transistors (Q1～Q6) divided into upper arms (Q1, Q3, Q5) and lower arms (Q2, Q4, Q6) connected to the motor as switches to control the current flowing through the motor coils. The control section provides PWM (Pulse Width Modulation) to determine the switching frequency of the power transistors and the commutation timing of the inverter (inverter). Brushless DC motors are generally desired for speed control applications where the speed remains stable at the set value with minimal variation when the load changes. Therefore, Hall sensors (hall-sensor) capable of sensing the magnetic field are installed inside the motor for closed-loop speed control and as a basis for phase sequence control. However, this is only used for speed control and cannot be used for position control.

zama motor working principle

The startup and operation of the motor are formed by the interaction of the magnetic fields generated by the stator windings, the rotor squirrel-cage windings, and the permanent magnets. When the motor is stationary, three-phase symmetrical current is supplied to the stator windings, generating a stator rotating magnetic field. The stator rotating magnetic field rotates relative to the rotor, inducing current in the squirrel-cage windings and forming a rotor rotating magnetic field. The asynchronous torque generated by the interaction between the stator rotating magnetic field and the rotor rotating magnetic field accelerates the rotor from rest. During this process, the rotor permanent magnet field and the stator rotating magnetic field have different speeds, producing an alternating torque. When the rotor accelerates to a speed close to the synchronous speed, the speed of the rotor permanent magnet field approaches that of the stator rotating magnetic field. The stator rotating magnetic field speed is slightly greater than the rotor permanent magnet field speed, and their interaction produces torque that pulls the rotor into synchronous operation. In synchronous operation, no current is generated in the rotor windings. At this time, only the permanent magnets on the rotor produce a magnetic field, which interacts with the stator rotating magnetic field to generate driving torque. Thus, it can be seen that permanent magnet synchronous motors rely on the asynchronous torque of the rotor windings to start. After startup is complete, the rotor windings no longer play a role, and the driving torque is generated by the interaction of the magnetic fields produced by the permanent magnets and the stator windings.

Weidou Intelligent Technology professionally sells German zama motors, zama motors, zama drives, zama synchronous motors, zama servo motors, zama DC motors, zama AC motors, zama stepper motors, zama synchronous motors, zama asynchronous motors, zama single-phase motors, zama three-phase motors, zama drive motors, zama geared motors, zama electric motors, zama original imports from Germany. Welcome customers to inquire and order.